Installation and Maintenance Manual IM 1152-10

Group: ATS
Part Number: IM1152-10
Date: July 2024

ThinLine Horizontal Fan Coils and

Cabinet Unit Heaters
Type FC and FH

Exposed Horizontal Cabinet Fan Coil

Recessed Horizontal Cabinet Fan Coil

Concealed Horizontal Unit Heater Concealed Horizontal Fan Coil

 Table of Contents

Table of Contents Controls and Thermostats . . . . . . . . . . . . . . . . . . . . 22

Digital-Ready Controls . . . . . . . . . . . . . . . . . . . . . . . 22
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Digital Thermostats . . . . . . . . . . . . . . . . . . . . . . . . . 24
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
T180 Programmable Thermostat . . . . . . . . . . . . . . . 25
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
MicroTech III Controller . . . . . . . . . . . . . . . . . . . . . . 25
Receiving and Storage . . . . . . . . . . . . . . . . . . . . . . . . 5
Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Pre-Installation Notes . . . . . . . . . . . . . . . . . . . . . . . . . 5
Factory Installed Equipment . . . . . . . . . . . . . . . . . . 29
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Uncrating and Inspecting the Unit . . . . . . . . . . . . . . . 7
Unit Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Recommended Maintenance Clearance . . . . . . . . . . 8
Valve and Piping Packages . . . . . . . . . . . . . . . . . . . 39
Duct Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Factory-Installed Valve and Piping Packages . . . . . 39
Ductwork Recommendations . . . . . . . . . . . . . . . . . . . 8
Control Valve Options . . . . . . . . . . . . . . . . . . . . . . . . 41
External Insulating Requirements . . . . . . . . . . . . . . . 8
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Piping Connection Recommendations . . . . . . . . . . . . 9
Model Number Description . . . . . . . . . . . . . . . . . . . . 51
Chilled Water Pipe Connections . . . . . . . . . . . . . . . . 10
Addendum IM 1014 — MT155 . . . . . . . . . . . . . . . . . . 57
Field-Installed Valve & Piping . . . . . . . . . . . . . . . . . . . 11
Addendum IM 1089 — MT155 A/B . . . . . . . . . . . . . . 61
Steam Piping Connections . . . . . . . . . . . . . . . . . . . . 12
Addendum IM 1015 — MT158 A . . . . . . . . . . . . . . . . 65
Two-Pipe Systems with Electric Heat . . . . . . . . . . . . 12
Addendum IM 1016 — MT158 B . . . . . . . . . . . . . . . . 69
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . 13
Addendum IM 1017 — MT168 . . . . . . . . . . . . . . . . . . 73
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Addendum IM 846 — MT170 . . . . . . . . . . . . . . . . . . . 77
Condensate Overflow Detection Device . . . . . . . . . 15
Addendum IM 1019 — MT180 . . . . . . . . . . . . . . . . . . 87
Decorative Trim Flange for Partially-Recessed Units . . 15
Addendum IM 1171 — Digitally Adjustable
Electric Heat Over-Temp Reset Button . . . . . . . . . . 16
Display Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Initial Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Addendum IM 831 — Thermostat
Cleaning & Flushing the Water System . . . . . . . . . . 17 Conversion Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Venting Hydronic Coils . . . . . . . . . . . . . . . . . . . . . . . 17 Addendum IM 763 — Automatic
Equipment Start Up Check List . . . . . . . . . . . . . . . . 18 Changeover Switch . . . . . . . . . . . . . . . . . . . . . . . . . 121
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Addendum OM 1111 — MicroTech Unit Controller
with I/O Expansion Module for Fan Coils . . . . . . . 123
General Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 19
Addendum ED 19059 — ThinLine and
Monthly Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Large Cap Fan Coils . . . . . . . . . . . . . . . . . . . . . . . . 155
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . 21

©2024 Daikin Applied, Minneapolis, MN. All rights reserved throughout the world. This document contains the most current product
information as of this printing. Daikin Applied Americas Inc. has the right to change the information, design, and construction of the
product represented within the document without prior notice. For the most up-to-date product information, please go to
www.DaikinApplied.com.
™® MicroTech and Daikin Applied are trademarks or registered trademarks of Daikin Applied Americas Inc. The following are
trademarks or registered trademarks of their respective companies: BACnet from American Society of Heating, Refrigerating and
Air-Conditioning Engineers, Inc.; Echelon, LonWorks, LonMark, and LonTalk from Echelon Corporation; Modbus from Schneider
Electric; and Windows from Microsoft Corporation.

IM 1152-10 • HORIZONTAL FAN COILS 2 www.DaikinApplied.com

 Introduction

Introduction They are also available in four-pipe configurations with a

primary coil and a secondary reheat or preheat coil. A variety
Daikin Applied Thinline Horizontal Fan Coils are intended for of factory-built piping packages are available, either factory or
use in single zone applications. They are available in sizes field-installed. Units are available with a variety of thermostat
from 200 to 1200 cfm. Figure 2 describes the main features of and fan speed control options, including the MicroTech® III
these units and can be referred to for component placement. controller board.
These units are available in two-pipe configurations with one
hydronic coil, with or without electric heat.

Figure 1: Nomenclature (see page 51 for complete model number description)

FC H C – 2 02 A

Unit Type Voltage

FC = Fan Coil A = 115/60/1
FH = Cabinet Unit Heater E = 208-230/60/1
J = 277-265/60/1

Unit Configuration
H= Horizontal Unit Size
02 = 200 CFM
03 = 300 CFM
Cabinet Type 04 = 400 CFM
C = Cabinet 06 = 600 CFM
R = Recessed 08 = 800 CFM
H = Hideaway 10 = 1000 CFM
12 = 1200 CFM

Design Series

Figure 2: Model FCHH with Return Plenum

Return Plenum

Primary Coil
(Chilled Water Cooling)
2-, 3- or 4-row

Secondary Coil
Drain Pain
(Hot Water or Steam Heating)
Galvanized or Stainless Steel
Standard or High Capacity

www.DaikinApplied.com 3 IM 1152-10 • HORIZONTAL FAN COILS

 Introduction

Safety Operating Limits

Follow all safety codes. Wear safety glasses and work gloves. This equipment is designed for indoor installation only.
Use a quenching cloth for brazing operations. Have a fire Sheltered locations such as attics, garages, etc., generally
extinguisher available. Follow all warnings and cautions in will not provide sufficient protection against extremes in
these instructions and attached to the unit. Consult applicable temperature and/or humidity, and equipment performance,
local building codes and National Electrical Codes (NEC) for reliability, and service life may be adversely affected.
special requirements.
DANGER
Recognize safety information. When you see a safety symbol
on the unit or in these instructions, be alert to the potential Disconnect all electrical power before servicing unit. Electrical
for personal injury. Understand the meanings of the words shock will cause severe injury or death.
DANGER, WARNING, and CAUTION.
• DANGER identifies the most serious hazards that will WARNING
result in death or severe personal injury; Hazardous Voltage!
• WARNING means the hazards can result in death or Use copper conductors only. Unit terminals are not designed
severe personal injury; to accept other types of conductors. Failure to do so may
• CAUTION identifies unsafe practices that can result in cause damage to the equipment.
personal injury or product and property damage.
Improper installation, adjustment, service, maintenance, or use WARNING
can cause explosion, fire, electrical shock, or other conditions Personal injury hazard. Wear protective gloves to avoid
which may result in personal injury or property damage. possible cuts and abrasions from exposed edges. Avoid
This product must be installed only by personnel with the contact with sharp edges
training, experience, skills, and applicable licensing that makes
him/her “a qualified professional HVACR installer.” CAUTION
Cleaning agents may cause serious damage to internal
components, such as aluminum coils and electronic controls,
etc. Do not operate fan coil while building maintenance
cleaning agents are in use.

CAUTION
Sharp edges and coil surfaces are injury hazards. Avoid
contact with them.

CAUTION
Moving machinery and electrical power hazards may cause
severe personal injury or death. Disconnect and lock off
power before servicing equipment.

NOTICE
Installation and maintenance are to be performed only by
qualified personnel who are familiar with and in compliance
with state, local and national codes and regulations, and
experienced with this type of equipment.

IM 1152-10 • HORIZONTAL FAN COILS 4 www.DaikinApplied.com

 Introduction

Receiving and Storage Pre-Installation Notes

Upon receipt of the equipment, check carton for visible Installation and maintenance are to be performed only by
damage. Make a notation on the shipper’s delivery ticket qualified personnel who are familiar with and in compliance
before signing. If there is any evidence of rough handling, with state, local and national codes and regulations, and
immediately open the cartons to check for concealed damage. experienced with this type of equipment. Before beginning
If any damage is found, notify the carrier within 48 hours to installation, please read this publication in its entirety.
establish your claim and request their inspection and a report. Directions given in this bulletin for right and left sides or coil
The Warranty Claims Department should then be contacted. hand assume a position facing the front (discharge) of the unit.
Do not stand or transport the machines on end. For storing, 1. To prevent damage, do not operate this equipment
each carton is marked with “up” arrows. for supplementary heating and cooling during the
construction period. Doing so will void the warranty.
Temporary storage at the job site must be indoors, completely
sheltered from rain, snow, etc. High or low temperatures 2. Inspect the carton for any specific tagging numbers
naturally associated with weather patterns will not harm the indicated by the factory per a request from the installing
units. Excessively high temperatures, 140°F (60°C) and contractor. At this time the voltage, phase and capacity
higher, may deteriorate certain plastic materials and cause should be checked against the plans.
permanent damage. 3. Check the packing list and unit identification/tagging
numbers against the plans to verify that the unit is being
IMPORTANT installed in the correct location. The unit data plate is
This product was carefully packed and thoroughly inspected attached to the front of the control box (see Figure 3).
before leaving the factory. Responsibility for its safe delivery Remove the bottom panel on cabinet units to access
was assumed by the carrier upon acceptance of the shipment. it. The panel contains specific information on standard
Claims for loss or damage sustained in transit must therefore components as listed in Figure 1 on page 3 and
be made upon the carrier as follows: starting in Table 3 on page 51.
VISIBLE LOSS OR DAMAGE 4. Before installation, check the available dimensions of
Any external evidence of loss or damage must be noted on
the space where the unit is to be installed against the
the freight bill or carrier’s receipt, and signed by the carrier’s
agent. Failure to adequately describe such external evidence dimensions of the unit.
of loss or damage may result in the carrier’s refusal to honor 5. Note the location and routing of water piping, condensate
a damage claim. The form required to file such a claim will be drain piping, and electrical wiring. The locations of these
supplied by the carrier. items should be clearly marked on submittal drawings.
CONCEALED LOSS OR DAMAGE
6. An installing contractor may find it beneficial to confer
Concealed loss or damage means loss or damage which
does not become apparent until the product has been with piping, sheet metal, and electrical foremen before
unpacked. The contents may be damaged in transit due to installing any unit.
rough handling even though the carton may not show external NOTE: Check the unit data plate for correct voltage with the
damages. When the damage is discovered upon unpacking, plans before installing the equipment. Also, make
make a written request for inspection by the carrier’s agent sure all electrical ground connections are made in
within fifteen (15) days of the delivery date and file a claim accordance with local code.
with the carrier

www.DaikinApplied.com 5 IM 1152-10 • HORIZONTAL FAN COILS

 Introduction

7. After installation, cover the unit with the shipping carton 9. Air ducts, when used with hideaway units, should be
or other appropriate material for protection during installed in accordance with local and national codes,
finishing of the building. This is critical while spraying including National Fire Protection Association standards
fireproofing material on ceiling beams, bar joists, for the Installation of Air Conditioning and Ventilating
sandblasting, spray painting and plastering. Damage to Systems and the National Fire Protection Association
the unit due to a failure to protect it during finishing of the standards for the Installation of Air Conditioning and
building is not covered by the warranty. Ventilation Systems other than Residence Type.
8. Maximum entering water temperature is 200°F (93°C). 10. Completed installation of hideaway units without return
plenum must comply with the requirements of NFPA90B
Figure 3: Data Plate Location with regard to the use of concealed ceiling spaces as
return air plenums.
11. When a return air duct is not provided, applicable codes
may limit installation to single story buildings.
12. A one-inch duct collar is provided on units with a ducted
return and/or discharge to attach ductwork. Daikin
Applied recommends using galvanized sheet metal
ductwork. Slide the sheet metal duct over the duct collar
flange of the unit, seal the joint and fasten with sheet
metal screws.
13. Vibration isolators are generally not needed, if required
by local codes, they must be provided by the installing
contractor.
14. Valve and Piping Packages supplied with the unit
should be supported during the installation process. It is
advisable to keep the support in place after the unit has
been installed and started.

IM 1152-10 • HORIZONTAL FAN COILS 6 www.DaikinApplied.com

 Installation

Installation 9. All water and drain lines should be well insulated to

prevent sweating and heat loss. See External Insulating
Requirements for more detail Electrical connections can
Uncrating and Inspecting the Unit now be made to the electrical panel or chase, in case the
panel is not provided. Unless it is a special-order unit,
WARNING all electrical connections are made in the main electrical
Plastic packaging is a suffocation hazard, dispose of properly. control panel located on the opposite side of the primary
Keep away from children. panel connections. Electrical power wiring goes through
the chase located between the drain pan and coil
1. Carefully remove the packaging, remaining alert to any section. If needed the power connections may be done
signs of shipping damage. Be careful not to discard through knockouts located on both sides of the unit. See
components that may be included with the packaging. Figure 4.
2. If the unit is damaged, file a claim with the carrier. Notify
the local Daikin Applied representative immediately. Figure 4: Electrical Knockouts (Typical)

3. You may want to retain some or all of the packaging to

provide jobsite unit location information and temporary
protection for the fan coil after installation. Be sure to
dispose of plastic packaging and protective cardboard
properly, in accordance with local recycling rules and
guidelines.
4. Touch up painted panels if necessary. If panels need
paint, sanding is not necessary. However, clean the
surface of any oil, grease, or dirt residue so the paint will
adhere. Purchase factory approved touch up paint from
your Daikin Applied Representative or Daikin Applied
Service.

10. The installer shall provide wiring to the unit. Branch

Installation circuit overcurrent protection and disconnect should
1. Consult job blueprints for unit location. conform to the applicable electrical codes. The motor
provided is “thermally protected.” See Electrical
2. Clean area where unit is to be installed, removing all Connections on page 13.
construction dirt and debris.
11. All panels and doors should be in place and closed
3. Remove the unit from the shipping carton and plastic before starting up the unit.
covering. Save the carton and plastic to use as a
protective cover after the installation is complete. 12. During summer construction, there is an unusually
high amount of moisture in the air; therefore, the
4. Rotate fan wheels by hand to make sure the wheels initial pulldown should be very gradual (high speed for
rotate freely. maximum airflow with reduced GPM and elevated chilled
5. Unit is ready for installation. See Duct Connections for water temperature for reduced capacity). This procedure
more detail. will reduce the possibility of the unit sweating.
6. Secure unit in proper position. The top of the unit must
be level. If hanger rods are used, “back-up” nuts should
be put on the rods to prevent the mounting nuts from
loosening. Install the drain pan by releasing the attached
cable ties(4) and securing the drain pan to the unit via
four detent pins (Figure 4). The drain pan is designed
to have a little gradient to ensure proper drainage and
operation. Do not level Drain Pan.
7. Water and drain connections can now be made to
the unit. Piping must be installed in accordance with
local codes and regulations. See Piping Connection
Recommendations for more detail.
8. Vent the coils.

www.DaikinApplied.com 7 IM 1152-10 • HORIZONTAL FAN COILS

 Installation

Recommended Maintenance Ductwork Recommendations

Clearance Follow the general recommendations listed below when
installing the ductwork for the unit.
Cabinet units have removable bottom and side panels for easy
access to components for service and maintenance. The fan 1. Air ducts should be made of galvanized steel and
assembly and main drain pan are easily removable from the connected to the flange of the unit with a canvas
bottom for cleaning. See Accessing/Removing the Main Fan connector. Insert the duct into the flange and fix
Deck and Motor Assembly on page 21 for more information. with screws. Duct connections must be installed in
accordance with national and local codes.
Figure 5 shows recommended maintenance clearances for
hideaway units. For exposed units use: 24 inches [61 cm] 2. Discharge ductwork should run in a straight line,
on either side (A and B) and 18 inches [46 cm] (C) below for unchanged in size or direction, for a minimum distance of
bottom panel removal. Units are referred to as either right-hand three fan diameters from the unit (approximately
or left-hand depending upon the piping connection. Hand is 20 inches).
designated by facing the front of the unit (airflow discharges 3. Avoid making sharp turns when making duct turns and
from the front or bottom). transitions. Use proportional splits, turning vanes, and air
scoops when necessary.

Duct Connections 4. When possible, construct and orient supply ductwork

turns in the same direction as the fan rotation.
Air ducts, when used with hideaway units, should be installed
in accordance with local and national codes, including
National Fire Protection Association standards for the External Insulating Requirements
Installation of Air Conditioning and Ventilating Systems and
Insulate and vapor-seal surfaces that are colder than the
the National Fire Protection Association standards for the
surrounding air dew point to prevent unplanned condensation.
Installation of Air Conditioning and Ventilation Systems other
Daikin Applied recommends field-insulation in the following
than Residence Type.
areas to prevent potential condensate problems:
A one-inch duct collar is provided on units with a ducted
• Supply and return water piping connections
return and/or discharge to attach ductwork. Daikin Applied
recommends using galvanized sheet metal ductwork. Slide the • Condensate drain lines and connections
sheet metal duct over the duct collar flange of the unit, seal the • Fresh air intake duct connections
joint and fasten with sheet metal screws. • Discharge duct connections
• Wall boxes

Figure 5: Concealed Hideaway Unit Clearance

Opposite Wall D Back Wall

Coil Connection Wall

Ceiling
C

A = 8" (same side connection) or 24" (opposite side)

B = 24"
C = 3"
D = 18" for Hideaway units without plenum

IM 1152-10 • HORIZONTAL FAN COILS 8 www.DaikinApplied.com

 Installation

Piping Connection Recommendations

General Guidelines
• The piping to and from the unit must be protected from
IMPORTANT outside air and freeze conditions. It must be suitably
Venting is required on the return piping for secondary preheat insulated for condensation and for heat loss or gain.
or reheat coils. It is included on factory-built piping packages, Penetrations entering the unit end compartments must be
but must be added by the installing contractor for field-installed fitted/sealed for unit integrity.
piping. See Figure 7 • Exterior condensate may be an issue if field piping does
not have a control valve. Review the supply and return
WARNING header locations in the dimensions drawings. If using a
field-assembled piping package, allow sufficient room to
Avoid overheating when soldering field connections install the secondary drain pan. Uninsulated piping for
to the coil to prevent leakage, overheating of the chilled water should not extend over the edges of the
copper tubes, and melting of valves, factory-soldered secondary condensate drain pan.
joints or component gasketing. A quenching cloth is
• Supply and return shutoff valves are recommended at
recommended. See Figure 6.
each unit. The return valve is used for balancing and
should have a “memory stop” so that it can always be
• Piping can be steel, copper or PVC, but must comply with
closed off, but can only be re-opened to the proper
local codes.
position for the flow required.
• Proper ventilation is required for soldering. When
• Primary coils are factory-equipped with vents for venting
soldering, use a quenching cloth to protect fan coil
the system, but secondary coils (preheat or reheat) are
components from overheating damage—melting
not. If the unit is not equipped with factory-built piping
insulation, also damage to valves, wiring, electronics,
packages which includes a secondary coil air vent, then
sensors, etc. See Figure 6. When Daikin Applied provides
vents must be added. See Figure 7.
valve packages with unions, o-rings are included. When
soldering near unions, remove the o-rings before heating. • Be sure to install control valves on the correct fan coil.
Indiscriminate mixing of valves in the field can result in
Figure 6: Protect Components from Overheating valves improperly sized for the desired flow rate, which
can result in poor operation and coil freezes.
• Install control valves so there is at least 2" (51mm)
minimum clearance to remove the actuator from the
valve body.

Figure 7: Secondary Coil Air Vent

• If sealant compound is not provided for flexible hose

fittings, apply Teflon tape to the connections to help
prevent leaks.
• Ensure proper insulation of supply and return piping. • Do not connect a unit to the supply and return piping
Proper insulation prevents loss of fan coil capacity, until the water system has been cleaned and flushed
overheating of end compartments, and/or moisture completely. After this is done, the initial connection should
dripping. have all valves wide open in preparation for water system
flushing.
• Automatic flow control devices must not be installed prior
to system cleaning and flushing.
• Check local code for any requirement for electrical fittings.

www.DaikinApplied.com 9 IM 1152-10 • HORIZONTAL FAN COILS

 Installation

Drain Piping Chilled Water Pipe Connections

• Condensate piping can be steel, copper, or PVC. A
means of disconnection must be furnished to facilitate fan No Valve Package
deck removal. • Connect chilled water pipes to the unit. The water supply
• No point of the drain system may be above the drain pan is on the bottom and water return is on top of the coil
of any unit. header. Connections may be 1/2" nominal sweat (5/8"
• Pipe insulation is recommended to avoid condensation. O.D.), 1/2" FPT adapters, or 3/4" FPT adapters.
• Suggested slope of the drain pipe is at least 1/8" per foot
to facilitate adequate condensate drainage but local code Connecting to a Factory-Installed Valve
requirement should prevail. & Piping Package
• Slide the pipe over the drain pan nipple and tighten To view connection locations for factory-installed valve & piping
the collar on the pipe with a hose clamp (supplied by packages, see Factory-Installed Valve and Piping Packages on
installer). page 39. Before installing supply and return lines to a factory
• The drain line should be supported to prevent undue piping package, review the following items.
stress on the secondary drain pan. Make sure the drain • All piping connections are 5/8" O.D.S. (1/2" nominal)
line is free of kinks. female copper connections.
• Trap drain line according to local codes. • Supply and return piping should not interfere with the
NOTE: Traps for exposed units may be located outside secondary drain pan or condensate line. The installer
the cabinet as there is insufficient space inside the unit. must provide adequate piping system filtration and water
• Cap overflow drain connection or connect it with clear treatment. Daikin Applied Deluxe and Enhanced piping
piping to the point where it can be used as an indicator packages include a strainer which prevents debris from
for a clogged main drain connection. entering the coil. Clean the strainer regularly.
• The fan coil ships with brackets and special shipping
packaging to adequately support the piping package
during shipment. Remove the packaging before
connecting to the water piping but leave the support
brackets in place during and after the installation.
• Set ALL valves to the fully open position to prevent
damage to the valve seat during brazing. Use a
quenching cloth as protection.
• Remove the secondary drain pan, if in place, to prevent
exposure to dripping solder or excessive temperatures.
• Solder water piping connections to supply and return end
connections. Avoid overheating factory soldered joints to
prevent the possibility of leakage.
• Insulate fan coil piping to secondary drain pan
connections and any piping that is not above the
secondary drain pan.

IM 1152-10 • HORIZONTAL FAN COILS 10 www.DaikinApplied.com

 Installation

Field-Installed Valve & Piping

Review General Guidelines on page 9 before beginning. If the unit does not have a factory-installed valve & piping
Then carry out the following steps to install valves and piping. package, the changeover switch or sensor can be ordered for
field installation. The installer should attach the sensor or auto
• For units equipped with a secondary coil make sure that
changeover switch parallel to and in direct contact with the
an air vent is included in the return line piping. Primary
supply water pipe.
coils are factory-equipped with vents, secondary coils are
not. See Figure 7. Valve Package support brackets are NOTE: The installer is responsible to ensure the changeover
included with the secondary coil kits. sensor is installed in a location that can sense active
water temperature. Otherwise, the unit may fail
• Remove the secondary drain pan, if in place, to prevent to sense the correct operating mode and disable
exposure to dripping solder or excessive temperatures. temperature control.
NOTE: Field-installed valve and piping packages provided
by Daikin Applied include the secondary drain pan. When using field-supplied 3-way control valves, install the
If valve packages by the field, secondary drain pans changeover sensor upstream of the valve and the bypass
should be provided by others. on the supply water pipe. When using field-supplied two-way
control valves install the changeover sensor in a location that
• Slide ½" copper tubing or connection couplings (provided
will detect active water temperature. The unit must always be
by installer) onto the coil connections. Solder the joint
able to sense the correct system water temperature, regardless
using a good-quality, lead-free solder to provide a
of the control valve position.
watertight connection.
NOTE: The maximum length of the automatic changeover
• After connections are complete, insulate all piping to the
wire cannot exceed 10 feet from the control panel
coil connections as necessary to prevent condensate to the sensor. If the wire extends beyond the unit
from dripping outside of the secondary drain pan. chassis, use shielded conductors to eliminate radio
• Install the optional secondary drain pan. frequency interference (RFI).

Shutoff/Balancing Valve Figure 8: Automatic Changeover Switch and Sensor

Each fan coil should be at least be equipped with shutoff valves
on both the supply and return lines for easy serviceability
and removal if it becomes necessary. We suggest using a
combination shutoff/balancing valves between the main supply
line and the fan coil unit. These could be furnished by a 3rd-
party as part of a field-installed valve & piping package. The
balancing valve installed on the return line is used to adjust the
water flow to provide the best performance.

Automatic Changeover Sensor

Two-pipe changeover units require an automatic changeover
switch or pipe sensor that determines heating or cooling
mode based on the supply water temperature. On units with a
factory-installed valve & piping package, the factory straps the
changeover switch or sensor to the piping supply water pipe.
See Figure 8. For field-installed Valve Packages, the ACO
must be ordered separately.
For a two-pipe system with intermediate supplemental electric Figure 9: Bypass Bleed Line
heat, a second set is required including a changeover switch.
See Two-Pipe Systems with Electric Heat on page 12 BYPASS BLEED LINE
FLOW

section for more details. RETURN

NOTE: A bypass bleed line is installed on all factory provided

fan coil valve packages with a 2-way control valve FLOW
RETURN
to prevent stagnation of water near the changeover
switch (aqua-stat)or changeover sensor (10K pipe
sensor). The bleed line allows 3 – 4 gpm of flow to
bypass the coil which is necessary for the proper
function of the automatic changeover system. All
valve packages, cooling and heating, with a 2-way
control valve automatically include the bypass bleed
line. If the bleed line is unwanted, it may be crimped
by the installing contractor to prevent bypass flow.

www.DaikinApplied.com 11 IM 1152-10 • HORIZONTAL FAN COILS

 Installation

Steam Piping Connections Two-Pipe Systems with Electric Heat

CAUTION IMPORTANT
Coil Damage! Daikin Applied recommends operating the electric heater at
the High motor speed setting.
In all steam coil installations, the condensate return
connections must be at the low point of the coil to ensure
The electric heating coil is designed to be the total source
condensate flows freely from the coil at all times. Failure to
of heat for the unit. If used for auxiliary intermediate season
do so may cause physical coil damage from water hammer,
heating, additional control is required. A second changeover
unequal thermal stresses, freeze-up and/or corrosion
switch is required. For units ordered with intermediate electric
heat, the second changeover switch is factory installed.
Make piping connections to the steam coil per job
requirements. (Daikin Applied does not supply steam piping To protect the electric heat elements, an automatic and manual
connections.) Install a 1/2", 15-degree swing check vacuum electric heat switch disengages the electric heat to prevent
breaker in the unused condensate return trapping as overheating. For information on resetting the manual switch,
close as possible to the coil. The following procedures are see Electric Heat Over-Temp Reset Button on page 16. For
recommended: a typical wiring diagram, see Figure 59.
• Vent the vacuum breaker line to atmosphere or connect
it into the return main at the discharge side of the steam
trap.
• Pitch all steam supply and return mains down a minimum
of one inch per ten feet in the direction of flow.
• Do not drain the steam mains or takeoff through the coils.
Drain the mains ahead of the coils through a steam trap
to the return line.
• Overhead returns require one psig of pressure at the
steam trap discharge for each two-feet elevation to
ensure continuous condensate removal.
• Proper steam trap selection and installation is necessary
for satisfactory coil performance and service life. For
installation, use the following steps:
— Position the steam trap discharge at least 12
inches below the condensate return connection.
This provides sufficient hydrostatic head pressure
to overcome trap losses and ensure complete
condensate removal.
— Daikin Applied recommends using float and
thermostatic traps because of gravity drain and
continuous discharge operation.
— Use float and thermostatic traps with atmospheric
pressure gravity condensate return, with automatic
controls or where the possibility of low pressure
supply steam exists.
— Always install strainers as close as possible to the
trap inlet side.

IM 1152-10 • HORIZONTAL FAN COILS 12 www.DaikinApplied.com

 Installation

Electrical Connections
WARNING Electrical Data
A means for disconnect from electrical supply shall be The wiring diagram for the unit is attached to the exterior of the
provided according to NEC or local codes. Confirm that the blower housing. See Figure 11. Be sure the available power
power has been switched OFF before installing or servicing is the same voltage and phase as that shown on the unit data
the unit. plate. See Figure 3, for the location of the data plate. See page
44 through page 50 for typical wiring diagrams.
Installation and maintenance must be performed only by Line and low voltage wiring must be done in accordance
qualified personnel who are familiar with local codes and with local codes or the National Electrical Code, whichever is
regulations, and are experienced with this type of equipment. applicable.
Wiring connection must be completed according to the wiring
diagram on the unit. The unit must be GROUNDED. Installation Apply correct line voltage to the unit. Power wires to the unit
of all field wiring must comply with NEC and local codes. must be sized correctly. Branch circuit overcurrent protection
must be provided per local codes. See the data plate for
Line and voltage wiring must be done in accordance with local correct ratings.
codes or the National Electrical Code, whichever is applicable.
All 208-230V single-phase units are factory wired for
Apply correct line voltage to the unit. Power to the unit must be 230 V operation. For 208 V operation, the L1 wire connection
sized correctly. Branch circuit overcurrent protection must be to the unit transformer (found in the main control box) must be
provided per local codes. See the data plate for correct ratings. changed. The L1 wire must be disconnected from the 230 V
(orange) wire and connected to the 208 V (red) wire. The
Standard Electrical Connection 230 V wire must then be capped off with a wire nut or male
Field electrical power connections are made in the electrical terminal as appropriate. Please refer to the unit wiring diagram.
control box, which is mounted to the side of the chassis
opposite the primary coil piping connections. See Figure 10. An Figure 11: Location of the Wiring Diagram.
optional disconnect switch is located in this box.
Units with an electric heat option that have the same voltage
as the unit have single-point power connections and bring the
power conductors into this same connection box through one
of the knockouts. Units with electric heat that has a different
voltage should bring the electric heat into one of the knockouts
on the chase. See Figure 10.
If provided by the field, low voltage wires should be brought
into a knockout located next to the electrical control box. See
Figure 4.
Install a strain relief and pass the wires through the strain relief Operating Voltages
into the control box. Make the connections and reinstall the
control box cover. Operating voltages are as follows (+/– 10%).
• 115/60/1
Figure 10: Electrical Power Connections • 208-230/60/1
• 265-277/60/1
NOTE: Voltages listed are to show voltage range. However,
units operating with overvoltage and undervoltage for
extended periods of time will experience premature
component failure.
← Electrical Knockout

← Disconnect Switch (Optional)

Bottom View

www.DaikinApplied.com 13 IM 1152-10 • HORIZONTAL FAN COILS

 Installation

ECM Blower
If the unit is equipped with an ECM blower, additional steps Figure 14: Power Connector
may be required during the air balancing process. The ECM
blower is controlled by a control board. Three-speed taps are
provided with an ECM blower: high, medium and low.
Power Connector
The unit has been factory configured to produce PSC
equivalent airflow on high speed, with medium speed at 80%
and low speed at 60% of full volume. If these settings are
acceptable, then no further configuring is necessary. If different Pin Description
speeds are required select a field adjustment ECM. 1 JUMPER PIN 1 TO PIN 2 FOR
2 120 VAC LINE INPUT ONLY
Figure 12: ECM Blower 3 CHASSIS GROUND
4 AC LINE
5 AC LINE

ECM Motor → Figure 15: Signal Connector

Signal Connector

Pin Description Pin Description

EC Motor Pin Out Locations
1 C1 - Common 9 O
Figure 14 and Figure 15 show the pin locations for both 2 W/W1 – High Speed 10 BK/PWM
connectors. 3 C2 - Common 11 HEAT
4 DELAY 12 R- 24V
Figure 13: Connectors 5 COOL 13 EM/W2- Super High
6 Y1 – Low Speed 14 Y/Y2 – Super Low
7 ADJUST 15 G – Medium Speed
8 OUT- 16 OUT+

IM 1152-10 • HORIZONTAL FAN COILS 14 www.DaikinApplied.com

 Accessories

Accessories Decorative Trim Flange for

Condensate Overflow Detection Partially-Recessed Units
A fixed trim flange is used for partially-recessed fan coils (with
Device height restrictions of 14.5 inches or below). Trim Flanges
are also used with fan coils featuring a bottom discharge
The condensate overflow detection device is a factory-installed
configuration.
option on fan coils. This device has a condensate overflow
switch with dry contacts and is connected to the LV board or The sheetrock location for the unit should be cut to the
MicroTech board. See Figure 16. appropriate size, then framed with steel or wooden studs
before the decorative trim flange is installed. See Figure 45 on
If you suspect it is not working properly, check to be sure that
page 38 for a sample illustration and recommended gaps.
the float is installed straight up with the proper elevation. See
Accessing/Removing the Main Fan Deck and Motor Assembly DO NOT secure the Trim Flange without a stud frame to the
on page 21 for instructions on removing the main drain pan drywall.
to access the device.
The condensate overflow switch needs to be wired to the Figure 17: Decorative Trim Flange
proper controller (MicroTech for example) to shut off the fan if
excessive water is present in the drain pan.
← Framing Studs
Figure 16: Condensate Overflow Switch Installation

← Decorative Trim

Unit

Installing Horizontally Recessed Units

1. Using hanging rods, install the fan coil cabinet into the
ceiling ½" – ¾" above the drop ceiling panels.
2. The ceiling plate (delivered as an accessory from Daikin
Applied) is attached to the panel supports with four (4) 3"
screws and fastened tight to the ceiling.

Figure 18: Trim Flange Securing Detail

Metal or Wood Stud Frame
Multi-purpose Screw

Unit Cabinet

Ceiling Material 1/4" Gap

Trim Flange

NOTE: Max 1/4" all-around gap is recommended between

the cabinet unit and the trim flange

www.DaikinApplied.com 15 IM 1152-10 • HORIZONTAL FAN COILS

 Accessories

Electric Heat Over-Temp Reset

Button
DANGER
PERSONAL INJURY HAZARD.
Power supply can cause electrical shock. Always disconnect
power to unit before servicing.

The electric heat options comes with two over-temperature

switches. The first resets automatically when the over-
temperature condition no longer exists. The second, backup
high limit switch must be reset manually.
NOTE: The need to reset the manual switch may indicate
that there are improperly functioning system
components. If the switch trips again, contact Daikin
Applied Service for help in diagnosing the cause.
To reset the manual switch, carry out the following steps:
1. Disconnect all power to the unit. Verify the power has
been disconnected.
2. Remove the raceway access covers (see Accessing/
Removing the Main Fan Deck and Motor Assembly on
page 21).
3. Access and push in the red reset button in the raceway
of the heater assembly. See Figure 19.
4. Reinstall the access cover.
5. Reconnect the power.

Figure 19: Electric Heat Over-Temp Reset Button Location

IM 1152-10 • HORIZONTAL FAN COILS 16 www.DaikinApplied.com

 Initial Start-Up

Initial Start-Up • *Flush should continue for at least two hours or longer
until the drain water is clean and clear.
• Shut off the circulator pump and open all drains and vents
Cleaning & Flushing the Water to completely drain down the system.
System • Short-circuited supply and return run outs should now be
connected to the unit supply and return connections. Do
CAUTION not use sealers at the swivel flare connections of hoses.
• Refill the system with clean water. Test the water using
Units must be checked for water leaks upon initial water
litmus paper for acidity, and treat as required to leave the
system startup. Water leaks may be a result of mishandling or
water slightly alkaline (pH 7.5 to 8.5).
damage during shipping. Failure by the installing contractor to
check for leaks upon start-up of the water system could result • Antifreeze may also be added at this time. Use
in property damage commercial grade antifreeze designed for HVAC systems
only. Do not use automotive grade antifreeze. Antifreeze
• Prior to first operation of any unit, clean and flush the will have an effect on the performance of the unit.
water circulating system of all construction dirt and debris. • Once the system has been filled with clean water and
• If units are equipped with water shutoff valves, either antifreeze (if used), precautions should be taken to
electric or pressure operated, connect the supply and protect the system from contamination.
return runouts together at each unit location. This will
prevent the introduction of dirt into the unit. See Figure 20.
• Fill the system at the water makeup connection with all air
Venting Hydronic Coils
vents open. After filling, close all air vents.
IMPORTANT
• Start the main circulator with the pressure reducing
valve open. It is not Daikin Applied’s policy to make recommendations
on what brand or type of water treatment is to be installed
• Check vents in sequence to bleed off any trapped air,
and used. It is the responsibility of the general contractor/
ensuring circulation through all components of the
owner to verify that the water supply to the units is free from
system.
contaminates, corrosive agents, chemicals and/or minerals.
• While circulating water, check for any leaks in the unit The general contractor/owner should contact a local water
and surrounding piping and repair as necessary. treatment company regarding water quality issues and
• Drains at the lowest point(s) in the system should be treatment. A fouled water system will lead to premature
opened for initial flush and blow-down, making sure city component failure.
water fill valves are set to make up water at the same rate.
• Check the pressure gauge at pump suction and manually Hydronic coils require a vent, either manual or automatic, to
adjust the makeup to hold the same positive steady release air from the unit. Primary coils on all ThinLine fan coils
pressure both before and after opening the drain valves. come standard with a coil air vent. It is located on the piping
side of the unit, above the coil connections.
Figure 20: Connections for flushing system piping Secondary coils on ThinLine units are not equipped with an
air vent, but one is included on all factory-supplied valve and
piping packages. It is located on the pipe closest to the outlet
Return Runout coil connection. See Figure 20.
Perform the following steps to vent both primary and secondary
Supply Runout coils after installing the unit:
• Pressurize the building piping system with water and vent
any trapped air at system vents.
• For units with manual air vents, back the set screw out to
Mains expel air from the unit and then re-tighten the set screw.
• Automatic air vents should require no adjustment for
the coil to vent. However, if the coil does not vent
Flexible Hose immediately, unscrew the outer portion of the fitting to
expel air from the port. If debris has become trapped in
the vent, completely remove the outer portion of the fitting
and clean.

www.DaikinApplied.com 17 IM 1152-10 • HORIZONTAL FAN COILS

 Initial Start-Up

Equipment Start Up Check List

IMPORTANT
Fan coils must be filled with water before operating a circulating pump. Filling the system properly will result in immediate lubrication
of the bearings. The pump bearings should not be allowed to operate dry.

Receiving and Inspection Electrical/Controls Connection

□ Unit received undamaged □ Refer to unit wiring diagram
□ Unit received complete as ordered □ Connect incoming power service or services
□ Parts for field installation received as ordered □ Install and connect parts for field installation
□ Unit arrangement/hand correct Unit Start-up
□ Unit structural support complete and correct □ General visual unit and system inspection
Handling and Installation □ Check for proper fan rotation
□ Mounting grommets/isolators used □ Record electrical supply voltage
□ Unit mounted level and square □ Check all wiring for secure connections
□ Proper access provided for unit and accessories □ Close all unit isolation valves
□ Proper electrical service provided □ Flush water systems
□ Proper overcurrent protection provided □ Fill systems with water
□ Proper service switch/disconnect provided □ Vent water systems, as required
□ Proper chilled water line size to unit □ All ductwork and grilles in place
□ Proper hot water line size to unit □ All unit panels and filters in place
□ All services to unit in code compliance □ Start fans, pumps, chillers, etc.
□ All shipping screws and braces removed □ Check for overload conditions of all units
□ Unit protected from dirt and foreign matter □ Check all ductwork and units for air leaks
□ Install & connect parts for field installation □ Balance water systems, as required
Cooling/Heating Connections
□ Balance air systems, as required
□ Protect field-provided valve package components from heat □ Record all final settings for future use
□ Mount field-provided valve packages □ Check piping and ductwork for vibration
□ Connect field piping to unit □ Check all dampers for proper operation
□ Pressure test all piping for leaks □ Verify proper cooling operation
□ Install drain line and traps, as required □ Verify proper heating operation
□ Insulate all piping, as required □ Reinstall all covers and access panels
□ Install secondary drain pan under piping, as required □ Verify proper condensate drainage

Ductwork Connections
□ Install ductwork, fittings and grilles, as required
□ Flexible duct connections at unit
□ Proper supply and return grille type and size
□ Control outside air for freeze protection
□ Insulate all ductwork, as required

IM 1152-10 • HORIZONTAL FAN COILS 18 www.DaikinApplied.com

 Maintenance

Maintenance Figure 21: Filter Removal for Units with Bottom Returns

General Maintenance
Normal maintenance on all units is generally limited to filter
changes and cleaning the condensate drain pans. Units are
provided with permanently lubricated motors and require no
oiling.
Record performance measurements of volts, amps, and
water temperature differences (both heating and cooling). A
comparison of logged data with start-up and other annual data
is useful as an indicator of general equipment condition.

Filter Changes Figure 22: Filter Removal for Units with Rear Returns

Filter changes are required at regular intervals. The time period

between changes will depend upon the project requirements.
Some applications, such as motels, produce a lot of lint from
carpeting and linen changes, and will require more frequent
filter changes. Units equipped with a MicroTech III board may
have Change Filter indicator lights set to be activated at certain
time intervals (60, 90 or 120 days). For units which were not ↓ Pull Down
provided with MicroTech board check filters at 60-day intervals
for the first year until experience is acquired. If light cannot
be seen through the filter when held up to sunlight or a bright
light, it should be changed. A more critical standard may be
desirable.
Filters can be removed without removing any panels. See Coils
Figure 21 or Figure 22. Cabinet units are equipped with large
bottom access doors allowing easy access to the filter media Units provided with the proper type of air filters, even when
from any direction. replaced regularly,may require periodic coil cleaning. Coils may
be cleaned in-place by removing the motor/blower assemblies
A. To remove the filter and brushing the entering air face with a soft brush in a parallel
Bottom return: motion with the fins. Do not brush perpendicular to the fin
orientation, damage may occur. Brushing should be followed
1. Turn the tabs on the side of the filter frame. by blowing air through the fins with a vacuum cleaner from the
2. Slide your fingers along the bottom of the filter until they leaving air side then removing all debris with the vacuum.
reach the rear paperboard edge.
3. Pull the filter out of the unit.
Back return:
1. Turn the tabs on the bottom of the filter frame. Open the
frame.
2. Feel for the paperboard edge of the filter. Slide the filter
down and remove it.
C. To install a new filter
1. Bottom: Slide the filter in. Turn the tabs into place.
2. Back: Push the filter up until it clears the front lip on the
filter housing, then turn the tabs into place.
3. Close the tabs of the filter frame.

www.DaikinApplied.com 19 IM 1152-10 • HORIZONTAL FAN COILS

 Maintenance

Electric Resistance Heater Assembly Condensate Drain Pans

Electric resistance heaters typically require no periodic The main and secondary condensate drain pans should be
maintenance when the unit’s air filters are changed properly. checked annually and cleaned and flushed as required. See
Other conditions and equipment in the system may affect the Figure 24.
operation and service life of the heaters. The most important
operating conditions for an electric heater is airflow and supply Figure 24: Primary and Secondary Drain Pans
voltage. As a rule, Daikin Applied recommends operating the
electric heater on the High speed, never on Low. Restricted
or insufficient airflow over the elements and/or high supply
voltage to the elements will result in the unit overheating. This
condition may result in the heater cycling on the high limit
thermal cutout and premature failure of the heater.
Open-wire type heaters provided with ThinLine fan coils Primary Drain Pan →
(see Figure 23) have an automatic reset switch with a back ← Secondary Drain Pan
up high limit thermal switch. Automatic reset switches reset
after the heater has cooled. High limit thermal switches must
be manually reset. The high limit thermal cutout switch and
automatic reset switch are only safety devices, not intended for
continuous operation. With proper unit application and normal
operation, the high limit thermal devices will not trip. Accessing the Secondary Drain Pan
The need to reset the manual switches indicates there is a DANGER
problem. Any conditions that causes high limit cutout MUST be
corrected immediately. High supply voltage causes excessive Water coils exposed to freezing temperatures should be
amperage draw and may result in tripping the circuit breaker or drained or anti-freeze should be added to the water circuit to
blowing fuses on the incoming power supply. avoid freezing.

To access the secondary drain pan (cabinet units), remove

Figure 23: Exposed Electric Heater Assembly the side panel from the side of the unit where the main piping
connections are made (this is opposite the control panel side).
Drain Pan
1. Remove the 4 detent pins from the drain pan and move
the pan to a location for inspection and cleaning.
2. After inspection and cleaning, reinstall the drain pans by
reversing the procedure in Step 1.

Figure 25: Drain Pan Attachment to Coil Section

IM 1152-10 • HORIZONTAL FAN COILS 20 www.DaikinApplied.com

 Maintenance

Blower Figure 27: Removing Fan Deck Assembly

Dirt and dust should not be allowed to accumulate on the

blower wheels or housing (see typical, Figure 26). Excessive
debris can result in an unbalanced blower wheel condition
which can damage the wheel and/or motor. The wheel and
housing should be cleaned periodically using a brush and
vacuum cleaner. Care must be taken to not dislodge the factory
balancing weights on the blower blades.

Accessing/Removing the Main Fan Deck and

Motor Assembly
Both the fan deck and the main condensate drain pan are
easily removed for access and cleaning as follows.
Fan Deck:
1. Disconnect electrical power to the unit.
2. Remove the two screws that attach the fan deck to the
chassis, see Figure 27 (on sizes 10 and 12 units, there
are 4 screws to be removed). Figure 28: Unit Wiring Harness

3. Firmly grasp the fan deck and lift upward and off the unit.
See Figure 28.
4. Disconnect the fan motor wiring harness by removing the
plug where it attaches to the connector on the side of the
chassis. See Figure 28.
5. To reinstall, follow these steps in reverse order.

NOTE: Push the tabs inward on the sides of the plug to free it
from the connector base.

Monthly Intervals
• Inspect and clean the condensate drain pan to help avoid
clogging of drainage by dirt, dust, etc. Inspect drainage Replacement Parts
piping for proper condensate flow.
Factory replacement parts should be used wherever possible
• Check and clean the coil. Clean the coil with a low to maintain the unit’s performance, service life, operating
pressure water jet or low pressure air. characteristics and testing agency listings. Replacement
• Clean and tighten all the wiring connections. parts may be purchased through a local Daikin Applied sales
representative.
Figure 26: Fan Housing
Contact your local Daikin Applied sales representative or
Daikin Applied Parts before attempting any unit modifications.
Any modifications not authorized by Daikin Applied could void
all factory warranties and result in personal injury and/or unit
damage.
When ordering replacement parts the following information
must be supplied to ensure proper item identification:
1. Unit model number
2. Unit serial number
3. Unit orientation, hand connection (right or left hand when
facing into the airstream)
4. Complete part description including any numbers
See replacement parts list for descriptions and part numbers.
Contact Daikin Applied for authorization of any returned parts,
such as defective parts covered under warranty.

www.DaikinApplied.com 21 IM 1152-10 • HORIZONTAL FAN COILS

 Controls and Thermostats

Controls and Thermostats

Digital-Ready Controls
A wide variety of control options are available for Daikin Figure 29: LV Interface Board 24 VAC connections
Applied ThinLine Horizontal Fan Coils, both unit-mounted
and remote-mounted. This section provides a brief overview
of these options and their operation. For more complete
information, contact your Daikin Applied representative.

3-Position Fan Switch with Manual ON-

OFF
This three-speed fan switch (High, Med,
Low) with ON-OFF option, shown at the
right, is available as unit- or remote-
mounted. It operates on low-voltage
or line-voltage power and can be
provided with a factory-mounted low-
voltage interface board, which contains
three-24 volt relays with line voltage
contactors and terminal connections. The
transformer is factory-installed and wired.
Figure 30: LV Terminal Strip 24 VAC connections
Sequence of operation
• OFF: Fan is turned OFF. The
motorized fresh-air damper, when
supplied, is closed .
• High, Medium, Low: Fan runs continuously at the
selected speed. The two-position, motorized fresh-air
damper, when supplied, is opened.

Low-Voltage Interface Board or Terminal

Strip
A low-voltage interface board or terminal strip is used with any
remote (wall mounted) Daikin Applied thermostat or control.
They can also be used in conjunction with a field-supplied
controller of a building automation system (BAS) control where
low voltage is needed to operate the fan coil. They are located
in the control box for the unit (see Figure 29).
The LV interface board or terminal strip include:
• Three 24-volt relays with line-voltage contactors to
operate the fan motor speeds (LV interface board only).
• Terminal connections for interfacing to:
— An optional remote-mounted thermostat.
— Low-voltage actuators for heating and cooling valves.
— A return air sensor.
— A pipe temperature sensor for changeover from
heating to cooling on two-pipe systems.
• A factory-wired and installed transformer.
See Figure 29 for a list of connecting points. For additional
wiring information, see the typical wiring diagram on page
44 or the unit’s wiring diagram, which is attached to the fan
coil exterior. (see Figure 11 on page 13).

IM 1152-10 • HORIZONTAL FAN COILS 22 www.DaikinApplied.com

 Controls and Thermostats

MT155 Thermostat
For more details refer to Addendum IM 1014 — MT155 on TA155: A HEAT-OFF-COOL system switch manually selects
page 57. The MT155 series thermostat provides ON- heating or cooling mode (Addendum IM 1089 — MT155 A/B
OFF control for low-voltage or line-voltage valves and fan on page 61). In the HEAT position, only the heat output
motors. This thermostat is designed as a remote-mount with cycles with demand. In the COOL position, only the cool output
connection to the LV interface board mounted on the fan coil cycles with demand. In the OFF position, heating and cooling
unit. Options include manual or automatic changeover and outputs are off. Units with a two position system switch or
three-speed fan control for continuous or cycling fan operation. without a system switch must use a load transfer switch when
both heating and cooling outputs are used. This prevents
Figure 31: MT155 Thermostats control failure and equipment damage caused by direct cycling
between loads.
TB155: An ON-OFF system switch enables auto-changeover
of heating and cooling modes (Addendum IM 1089 — MT155
A/B on page 61). In the ON position the thermostat activates
heating or cooling outputs dependant upon the relationship
between set point and ambient temperature. Heat on to cool
on dead band is 4°F. In the OFF position, heating and cooling
outputs are OFF. Units without a system switch cycle between
heating and cooling with a 4°F dead band.
FAN: Some units have a switch for manual selection of fan
speed. On these units fan operation is either internally wired for
fan continuous operation or is dependant upon connection to
the fan supply input . When internally wired for fan continuous
operation, the fan will be OFF when the system switch is OFF.
Two standard control options are available: When dependant upon external connections the fan may not
• Continuous fan and ON-OFF valve cycle operation: The be OFF with the system switch in the OFF position. The fan
thermostat cycles the valves on and OFF. The fan runs supply input is switched to fan speed outputs (HI-MED-LO).
continuously at the manually selected fan speed.
• ON-OFF fan and ON-OFF valve cycle operation: The
thermostat cycles the fan from the manually selected fan
speed to OFF and it cycles the valves ON and OFF.
When the system switch is in the OFF position, the fan coil
system including the fan is shut OFF.

www.DaikinApplied.com 23 IM 1152-10 • HORIZONTAL FAN COILS

 Controls and Thermostats

Digital Thermostats
Daikin Applied offers a broad Two standard control options are available:
range of remote, wall-mounted • Continuous fan and modulating (or ON-OFF) valve
digital thermostats with the operation: The fan runs continuously at the manually
capability to control ON- selected fan speed (high, medium or low). The controller
OFF, 3-wire and proportional modulates the valves or, on the MT158, dip-switches can
modulating valves and be set to cycle the valves ON and OFF.
Normally-Closed or Normally-
Open actuator valves. For • ON-OFF fan cycle operation and modulating (or ON-
more information, refer to OFF) valve operation: The controller cycles the fan from
Daikin Applied publications ED the manually selected fan speed to OFF. The controller
18513 and ED 18527. modulates the valves or, on the MT158, dip-switches can
be set to cycle the valves ON and OFF.

T170 Thermostat with Digital Display

MT158 and MT168 Thermostat- Two thermostats are offered for remote installation only: TA170
for three-speed fan control and TB170 for staged fan operation.
Controllers with Digital Display Both thermostats are used for ON-OFF control of low- or
For more details refer to Addendum IM 1089 — MT155 A/B on line-voltage valves with auto changeover. Detailed installation
page 61, Addendum IM 1016 — MT158 B on page 69 and instructions and modes of operation can be found in Addendum
Addendum IM 1017 — MT168 on page 73. Series MT158 IM 846 — MT170 on page 77.
and MT168 microprocessor-based thermostat-controllers
combine a proportional integral control algorithm with adaptive Figure 33: T170 Thermostat with Digital Display
logic. They are remote-wall mounted.

Figure 32: MT158 and MT168 Thermostats

Heating and cooling outputs for the MT158 are individually

configurable for three-wire floating control valves or ON/OFF
valves in the Normally Open or Normally Closed modes.
Heating and cooling outputs for the MT168 provide 0-10 Vdc
or 4-20 mA for proportional modulating valve control. The
integrated, three-speed fan control switch is line voltage to
allow direct connection to the fan motors. Manual or automatic
changeover is provided with remote setback capability from
a time clock or facility management system. Features include
a Fahrenheit or Celsius digital display and a built-in purge
cycle which assists the controller to determine if the system is
supplying hot water or cooling.

IM 1152-10 • HORIZONTAL FAN COILS 24 www.DaikinApplied.com

 Controls and Thermostats

T180 Programmable Thermostat MicroTech III Controller

Daikin Applied offers two different 7-Day Programmable Digital
Heating/Cooling Thermostat with constant fan or Fan cycled, IMPORTANT
ON/OFF Valve Control depending on the fan speed control. Units equipped with MicroTech III controllers should be used
The thermostat interface contains buttons for use in navigation in conjunction with wall-mounted sensors only. Thermostats
to accompanying menus/screens and for performing specific should not be used with MicroTech controllers.
operations. Detailed installation instructions and modes of
operation can be found in Addendum IM 1019 — MT180 on ThinLine fan coils can be
page 87. provided with unit-mounted
MicroTech controllers and
Figure 34: T180 Thermostat with Digital Display multiple unit- or room-
mounted sensors.
MicroTech is a unit-mounted
controller able to operate in
either a stand-alone non-
communicating environment
or a communicating
environment. To operate
in a communicating
environment, a board
named communication module, is installed on the unit controller.
There are two types of communication modules available with
MicroTech controllers: LonWorks and BACnet MSTP.
Unit controllers and/or I-O expansion boards have inputs
for room or return temperatures, temperature setpoint
adjustments, fan speed switches, entering water temperatures,
discharge air temperatures, changeover auto switches, low
temperature detection, emergency shutdown detection,
condensate overflow detection, dirty air filter detection and
occupancy. All sensors are software selectable and the
controller is configured based on the selection.
For units with factory installed MicroTech III controllers, please
see OM 1111 for details.

www.DaikinApplied.com 25 IM 1152-10 • HORIZONTAL FAN COILS

 Controls and Thermostats

Sensors
Room Temperature Sensor with Setpoint MicroTech III Wall-Mounted Room
Adjustable Module and Fan Speed Temperature Sensor with Timed
Control Override
The Digitally Adjustable sensor MicroTech III Wall Mounted Room
provides the ultimate of temperature Temperature Sensors provide electronic
control and display, simple user sensing of room temperatures at wall
interface, alarm annunciation, and locations. The sensor features a thermistor
alarm reset. The easy to ready LCD (10kO), a green LED for unit status and
clearly identifies the system operating tenant override button.
mode including occupied/unoccupied
mode, fan operation and control, unit Sensor Specifications
status, timed override status, alarm • Thermistor resistance (10kΩ)
annunciation, and energy savings (Conforms to Advance Thermal
mode through a series of recognizable Products curve 2)
icons. Tactile response buttons initiate
adjustments for temperature set • Ambient Temperature Limits:
points, system mode, fan mode, occupancy, tenant override — Shipping and Storage: 40°F to 160°F (–40°C to 71°C)
and fault reset functions. The large numeric LCD will display — Operating: 40°F to 140°F (4°C to 60°C)
space temperature (°F or °C) with the corresponding setpoint • Locations: NEMA Type 1, Indoor only
conditions. This sensor is designed for use with BACnet or
• Connections: Color Coded Leads
LonWorks applications. However, it can also be installed as a
standalone sensor using factory default set points. Wiring
For detailed installation instructions and modes of operation 3-lead NEC Class II low voltage wiring.
see Addendum IM 1171 — Digitally Adjustable Display Sensor
on page 92. NOTE:
1. Do not install the wire cables in the same conduit with
power wiring.
2. Never apply external voltage of any type to any terminal
or damage will result.
3. Do not exceed ratings of the device. This is a low voltage
device:
4. Always use 22-gauge wire and never locate the room
temperature sensor more than 250′ from the unit:
Wiring must be installed in accordance with the National
Electrical Code and all local codes and ordinances, which can
require the use of plenum rated cable or conduit.

Mounting Location
Locate the sensor on a wall where exposure to unrestricted air
circulation represents the average temperature of the space. A
common mistake is to mount the sensor too close to the supply
air diffuser in a room. This causes short cycling of the air
conditioning unit and large room temperature swings.

IM 1152-10 • HORIZONTAL FAN COILS 26 www.DaikinApplied.com

 Controls and Thermostats

Installation
Utility Box Mounting of Sensor 669529001
DANGER
THIS EQUIPMENT PRESENTS 1. Feed the cable from the utility box.
HAZARDS OF ELECTRICITY. 2. Strip 1/4–inch of insulation from the end of the wires.
Failure to read and follow these instructions can result in 3. Connect stripped, labeled wires to matching terminals on
property damage, severe personal injury or death. the temperature sensor base. See Figure 35.
4. Tighten screws on terminal connections. Gently tug wire
CAUTION to check for secure connections. Confirm that each wire
is connected to the proper terminal.
Be certain that exposed portions of wires do not come in
contact with each other. 5. Neatly store excess wire back inside the utility box.
6. Mount the sensor base to the utility box using two 6-32 ×
1. Turn off power at the main service panel by removing the 5/8–inch flat head sheet metal screws provided with the
fuse or switching the appropriate circuit breaker to the sensor.
OFF position. 7. Replace cover on wall temperature sensor by attaching
2. To remove the cover on sensor 669529001, loosen two the catches at the top of the cover to the top tabs on the
Allen-wrench set screws located on the underside of the sensor base. Secure the cover to the base by tightening
cover. the two Allen wrench set-screws on the bottom of the
sensor cover. Do not overtighten.
3. Place the wall sensor mounting base against the wall
where the sensor where be located. Using the base as a NOTE: Sensor 669529001 has two Allen wrench set-screws
template trace the mounting holes onto the wall. on the underside of the sensor cover to secure it in
place. Do not overtighten.
4. Drill a 3/16" hole at each mounting hole mark.
5. Insert wall anchors into mounting holes and tap in to the
wall surface.
6. Feed wires through the back of the sensor mounting
base and align sensor mounting holes with wall anchors.
7. Use supplied screws to secure sensor base to wall.
8. Connect stripped, labeled wires to matching terminals
on the temperature sensor. Refer to Figure 35 for wiring
details.
9. Tighten screws on terminal connections. Gently tug wire
to check for secure connections. Confirm that each wire
is connected to the proper terminal.
10. Seal the hole where the wire enters through the wall
behind the temperature sensor, with non-flammable
insulation or putty.
11. Replace cover on wall temperature sensor by snapping
it in place.
12. Turn on power to the system at the main service panel.
13. Test wall temperature sensor operation as described in
“Testing”.
NOTE: Mount the sensor five feet above the floor. Do
not mount the sensor on an outside wall, in direct
sunlight, behind a door, or in an area affected by a
vent or duct.

www.DaikinApplied.com 27 IM 1152-10 • HORIZONTAL FAN COILS

 Controls and Thermostats

Wiring Timed Override

Figure 35: Temperature Sensor Wiring to MicroTech III Unit Press Override button for more than 3 but less than 10
Controller seconds and Unit will return to Occupied operation until the
override time expires ( as programmed in BMS).

Figure 36: MicroTech III Room Temperature Wall Sensor

with Timed Override

Cool Test
1. Using the building automation system (BMS), adjust
room cooling setpoint to 5 degrees below room
temperature.
2. Air conditioning should come on within five (5) minutes. Troubleshooting
Status indicator may come on.
Symptom Remedy
3. Using the BMS, adjust the set temperature 2 degrees
Check for 5 VDC at sensor, LED is
above the room temperature and the A/C should turn off. No LED illuminated dark when 5 VDC
There may be a fan delay on your system. is not present
Sensor must be located as described
Heat Test Unit turns on and off too frequently in
“ Mounting Location”.
1. Using the building automation system (BMS), adjust
room heating setpoint to 5 degrees above room
temperature.
2. Heating should come on within five (5) minutes. Status
indicator may come on.
3. Using the BMS, adjust the set temperature 2 degrees
above the room temperature and the A/C should turn off.
There may be a fan delay on your system.

IM 1152-10 • HORIZONTAL FAN COILS 28 www.DaikinApplied.com

 Factory-Installed Equipment

Factory-Installed Equipment Figure 37: Factory Installed Dampers

The fresh air damper module with top or rear fresh air inlets
is available for concealed, recessed or exposed units. Fresh
Air Damper control can be automated or manual. Automatic
options include a 2-position control or a full economizer option
(MicroTech controller only).
Manual Damper – The manual damper is field-adjustable to
allow a zero to 25 percent fresh air position.
Auto Two-Position Damper – The auto two-position damper
is factory set at 25 percent when open. The damper can be set
in the field to allow a zero to 50 percent fresh air position.
Economizer Damper – The economizer damper is
accompanied by a factory-installed and wired modulating
actuator. The damper is factory set at 25 percent default
minimum and 100 percent maximum opening. The damper
is field adjustable using MicroTech III to allow a zero to 100
percent fresh air.

www.DaikinApplied.com 29 IM 1152-10 • HORIZONTAL FAN COILS

 Physical Data

Physical Data
Unit Data
Table 1: Physical Data: Coils, Fans, Motors and Filters
Size 02 Size 03 Size 04 Size 06 Size 08 Size 10 Size 12
Primary Coil Data
Face Area, ft2 (cm2) 1.08 (1004) 1.08 (1004) 1.43(1323) 2.11(1962) 2.46(2281) 3.14(2917) 3.83(3559)
Fins/inch (cm) 12 (4.7) 12 (4.7) 12 (4.7) 12 (4.7) 12 (4.7) 12 (4.7) 12 (4.7)
Connection Size 1/2" Nominal Copper (5/8" OD)
Coil Dimensions
2-Row 17.3 × 1.7 × 9 17.3 × 1.7 × 9 22.8 × 1.7 × 9 33.8 × 1.7 × 9 39.3 × 1.7 × 9 50.2 × 1.7 × 9 61.3 × 1.7 × 9
L × D × H, in (cm) (43.9 × 4.4 × 22.9) (43.9 × 4.4 × 22.9) (57.9 × 4.4 × 22.9) (85.9 × 4.4 × 22.9) (99.8 × 4.4 × 22.9) (127.6 × 4.4 × 22.9) (155.7 × 4.4 × 22.9)
3-Row 17.3 × 2.6 × 9 17.3 × 2.6 × 9 22.8 × 2.6 × 9 33.8 × 2.6 × 9 39.3 × 2.6 × 9 50.2 × 2.6 × 9 61.3 × 2.6 × 9
L × D × H, in (cm) (43.9 × 6.6 × 22.9) (43.9 × 6.6 × 22.9) (57.9 × 6.6 × 22.9) (85.9 × 6.6 × 22.9) (99.8 × 6.6 × 22.9) (127.6 × 6.6 × 22.9) (155.7 × 6.6 × 22.9)
4-Row 17.3 × 1.7 × 9 17.3 × 3.5 × 9 22.8 × 3.5 × 9 33.8 × 3.5 × 9 39.3 × 3.5 × 9 50.2 × 3.5 × 9 61.3 × 3.5 × 9
L × D × H, in (cm) (43.9 × 8.8 × 22.9) (43.9 × 8.8 × 22.9) (57.9 × 8.8 × 22.9) (85.9 × 8.8 × 22.9) (99.8 × 8.8 × 22.9) (127.6 × 8.8 × 22.9) (155.7 × 8.8 × 22.9)
Coil Volume, Gal (Liters)
2-Row 0.19 (0.7) 0.19 (0.7) 0.24(.9) 0.32(1.2) 0.37(1.4) 0.46(1.7) 0.55(2.1)
3-Row 0.26 (1.0) 0.26 (1.0) 0.32(1.2) 0.45(1.7) 0.52(2.0) 0.64(2.4) 0.77(2.9)
4-Row 0.34 (1.3) 0.34 (1.3) 0.43(1.6 0.61(2.3) 0.70(2.6) 0.87(3.3) 1.05(4.0)
Secondary Coil Data: 1-Row Standard Capacity, Hot Water or Steam
Face Area, ft2 (cm2) 0.61(567) 0.61(567) 0.84(780.1) 1.3(1208) 1.5(1421) 1.99(1845) 2.44(2267)
Fins/inch (cm) 12 (4.7) 12 (4.7) 12 (4.7) 12 (4.7) 12 (4.7) 12 (4.7) 12 (4.7)
14.7 × .86 × 6 14.7 × .86 × 6 20.2 × .86 × 6 31.2 × .86 × 6 36.7 × .86 × 6 47.7 × .86 × 6 58.7 × .86 × 6 (149.0
L × D × H, in (cm)
(37.3 × 2.2 × 15.2) (37.3 × 2.2 × 15.2) (51.3 × 2.2 × 22.9) (79.2 × 2.2 × 22.9) (93.2 × 2.2 × 22.9) (121.1 × 2.2 × 22.9) × 2.2 × 22.9)
Coil Volume,
0.06 (0.23) 0.06 (0.23) 0.08 (0.30) 0.11 (0.42) 0.12 (0.45) 0.15 (0.57) 0.18 (0.70)
Gal (Liters)
Secondary Coil Data: 1-Row High Capacity, Hot Water or Steam
Face Area, ft2 (cm2) 0.82 (762) 0.82 (762) 1.26 (1171) 1.73 (1607) 2.04 (1895) 2.65 (2460) 3.26 (3029)
Fins/inch (cm) 12 (4.7) 12 (4.7) 12 (4.7) 12 (4.7) 12 (4.7) 12 (4.7) 12 (4.7)
14.7 × .86 × 8 14.7 × .86 × 8 20.2 × .86 × 8 31.2 × .86 × 8 36.7 × .86 × 8 47.7 × .86 × 8 58.7 × .86 × 8
L × D × H, in (cm)
(37.3 × 2.2 × 20.3) (37.3 × 2.2 × 20.3) (51.3 × 2.2 × 22.9) (79.2 × 2.2 × 22.9) (93.2 × 2.2 × 22.9) (121.1 × 2.2 × 22.9) (149.0 × 2.2 × 22.9)
Coil Volume,
0.08 (0.30) 0.08 (0.30) 0.11 (0.42) 0.14 (0.53) 0.16 (0.61) 0.20 (0.76) 0.24 (0.92)
Gal (Liters)
Fan/Motor Data
Fan Quantity 1 1 2 2 2 4 4
Motor Quantity 1 1 1 1 1 2 2
Filter Data
Throwaway (MERV 4), MERV 8*, MERV 13**, and Aluminum Washable
Quantity
1 1 1 1 1 2 2
Hideaway 9(3/8) x 19(1/4) x 1 9(3/8) x 19(1/4) x 1 9(3/8) x 24(3/4) x 1 9(3/8) x 35(3/4) x 1 9(3/8) x 41(1/4) x 1 9(3/8) x 26 x 1 9(3/8) x 31(1/2) x 1
L x D x H (in) 9(3/8) x 19(1/4) x 2 9(3/8) x 19(1/4) x 2 9(3/8) x 24(3/4) x 2 9(3/8) x 35(3/4) x 2 9(3/8) x 41(1/4) x 2 9(3/8) x 26 x 2 9(3/8) x 31(1/2) x 2
Cabinet 10(3/4) x 20(7/8) x 1 10(3/4) x 20(7/8) x 1 10(3/4) x 24(3/4) x 1 10(3/4) x 36(3/8) x 1 10(3/4) x 40(1/4) x 1 10(3/4) x 25(7/8) x 1 10(3/4) x 31(3/4) x 1
L x D x H (in) 10(3/4) x 20(7/8) x 2 10(3/4) x 20(7/8) x 2 10(3/4) x 24(3/4) x 2 10(3/4) x 36(3/8) x 2 10(3/4) x 40(1/4) x 2 10(3/4) x 25(7/8) x 2 10(3/4) x 31(3/4) x 2
*PSC requires 2" depth
**For use with ECM only

Shipping Weights
Table 2: Approximate Shipping Weights - lbs (kg)*
Unit Size
Unit Type
S02 S03 S04 S06 S08 S10 S12
FCHC/FCHR 108 (49) 110 (50) 124 (56) 139 (63) 151 (69) 184 (84) 196 (89)
FCHH 30 (14) 33 (15) 35 (16) 45 (20) 55 (25) 62 (28) 65 (30)
Note: *Approximate dry weights do not include plenums, valve packages, hot water coils, electric heaters or other options.

IM 1152-10 • HORIZONTAL FAN COILS 30 www.DaikinApplied.com

 Physical Data

Unit Dimensions
Figure 38: Dimensions – Hideaway Fan Coil, Front Discharge – Free Return
Reheat coil shown

Top View

5.01

(4) Mounting
Holes Secondary Drain Pan (1)
⅜" × ⅝"
Control
Box
⅝" O.D. Coil
Connections
(Typical)

1.0 NOTES: (1) Secondary drain pan is only supplied with factory-provided
C 1.73 piping packages
(2) Same-hand connection shown, opposite-hand configuration
6.0
has secondary coil connections on the control box side

○
×
REFERENCE POINT
F
0.5 D H
1.54
0.64 2.49 1.25
4.35
3.4
B 0.68 L 15.28
1.62
REFERENCE POINT REFERENCE POINT
○
× ○
×

9.25

9.47 8.08 P 6.75 K

9.86 9.42

5.21 1.5
0.5" O.D.
A Overflow Connection
3.11
0.75" O.D.
Drain Connection
Front View Side View

S02 S03 S04 S06 S08 S10 S12

Dimension
inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm)
Overall Unit Width A 28.48 (723) 28.48 (723) 33.98 (863) 44.98 (1142) 50.48 (12.82) 61.48 (1562) 72.48 (1841)
Chassis Width B 20.63 (524) 20.63 (524) 26.13 (664) 37.13 (943) 42.63 (1083) 53.63 (1362) 64.63 (1641)
Mounting Hole Distance (Rear) C 18.64 (473) 18.64 (473) 24.14 (613) 35.14 (892) 40.64 (1032) 51.64 (1312) 62.44 (1702)
Mounting Slot Location (Front) D 19.35 (491) 19.35 (491) 24.85 (631) 35.85 (911) 41.35 (1050) 52.35 (1330) 63.35 (1609)
Discharge Opening - Width F 17.39 (442) 17.39 (442) 22.84 (581) 33.89 (867) 39.39 (1000) 50.39 (1280) 61.39 (1559)
Primary Coil Location H 1.81 (46) for 2- or 3-row primary coil; 2.81 (71) for 4-row primary coil
Secondary Coil - Standard Capacity 2.86 (73)
L
Secondary Coil - High Capacity 0.86 (22)
Secondary Coil - Standard Capacity 5.0 (127)
K
Secondary Coil - High Capacity 7.0 (178)

www.DaikinApplied.com 31 IM 1152-10 • HORIZONTAL FAN COILS

 Physical Data

Figure 39: Dimensions – Hideaway Fan Coil With Plenum, Front Discharge – Rear Return

Top View

5.01

(4) Mounting
Holes Secondary Drain Pan (1)
⅜" × ⅝"
Control
Box
⅝" O.D. Coil
Connections
(Typical)

1.0 NOTES: (1) Secondary drain pan is only supplied with factory-provided
C 1.73 piping packages
(2) For units without mixing box
6.0
(3) Same-hand connection shown, opposite-hand configuration
has secondary coil connections on the control box side
○
×
REFERENCE POINT
F
0.5 D H
1.54
0.64 2.49 1.25 21.5 (2)
4.35 20.2 (2)
5.4
B 0.68 L 17.3 (2)
1.62
REFERENCE POINT REFERENCE POINT
○
× ○
×

9.25 8.8

9.47 8.08 P 6.75 K 9.88

9.86 9.42

5.21 1.5
0.5" O.D.
A Overflow Connection
3.11
0.75" O.D.
Drain Connection
Front View Side View

S02 S03 S04 S06 S08 S10 S12

Dimension
inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm)
Overall Unit Width A 30.48 (771) 30.48 (771) 35.98 (944) 46.98 (1193) 52.48 (1333) 63.48 (1612) 74.48 (1892)
Chassis Width B 20.63 (524) 20.63 (524) 26.13 (664) 37.13 (943) 42.63 (1083) 53.63 (1362) 64.63 (1641)
Mounting Hole Distance (Rear) C 18.64 (473) 18.64 (473) 24.14 (613) 35.14 (892) 40.64 (1032) 51.64 (1312) 62.44 (1702)
Mounting Slot Location (Front) D 19.35 (491) 19.35 (491) 24.85 (631) 35.85 (911) 41.35 (1050) 52.35 (1330) 63.35 (1609)
Discharge Opening - Width F 17.39 (442) 17.39 (442) 22.84 (581) 33.89 (867) 39.39 (1000) 50.39 (1280) 61.39 (1559)
Plenum/Return Air Opening - Width G 21.5 (546) 21.5 (546) 27.0 (686) 38.0 (965) 43.5 (1105) 54.5 (1384) 65.5 (1664)
Primary Coil Location H 1.81 (46) for 2- or 3-row primary coil; 2.81 (71) for 4-row primary coil
Secondary Coil - Standard Capacity 2.86 (73)
L
Secondary Coil - High Capacity 0.86 (22)
Secondary Coil - Standard Capacity 5.0 (127)
K
Secondary Coil - High Capacity 7.0 (178)

IM 1152-10 • HORIZONTAL FAN COILS 32 www.DaikinApplied.com

 Physical Data

Figure 40: Dimensions – Hideaway Fan Coil With Plenum, Front Discharge – Bottom Return

Top View

G
Secondary Drain Pan (1)
5.01
0.952 E 0.952

(4) Mounting
Holes
⅜" × ⅝"
Control Return Air Opening
Box
⅝" O.D. Coil
Connections
(Typical)

1.0 NOTES: (1) Secondary drain pan is only supplied with factory-provided
C 1.73 piping packages
(2) Same-hand connection shown, opposite-hand configuration
6.0
has secondary coil connections on the control box side

○
×
REFERENCE POINT
F
0.5 D H
1.54
0.64 2.49 1.25
4.35 20.2
5.4
B 0.68 L 17.3
1.62
REFERENCE POINT REFERENCE POINT
○
× ○
×

9.25

9.47 8.08 P 6.75 K

9.86 9.42 11.13

0.647

5.21
0.75" O.D.
Drain Connection 2.11 2.25
A
0.5" O.D. 7.812
Overflow Connection
Front View 3.11
1.5

Side View

S02 S03 S04 S06 S08 S10 S12

Dimension
inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm)
Overall Unit Width A 30.48 (771) 30.48 (771) 35.98 (944) 46.98 (1193) 52.48 (1333) 63.48 (1612) 74.48 (1892)
Chassis Width B 20.63 (524) 20.63 (524) 26.13 (664) 37.13 (943) 42.63 (1083) 53.63 (1362) 64.63 (1641)
Mounting Hole Distance (Rear) C 18.64 (473) 18.64 (473) 24.14 (613) 35.14 (892) 40.64 (1032) 51.64 (1312) 62.44 (1702)
Mounting Slot Location (Front) D 19.35 (491) 19.35 (491) 24.85 (631) 35.85 (911) 41.35 (1050) 52.35 (1330) 63.35 (1609)
Return Air Opening - Width E 17.7 (450) 17.7 (450) 23.2 (589) 34.2 (869) 39.7 (1008) 50.7 (1288) 61.7 (1567)
Discharge Opening - Width F 17.39 (442) 17.39 (442) 22.84 (581) 33.89 (867) 39.39 (1000) 50.39 (1280) 61.39 (1559)
Plenum Width G 21.5 (546) 21.5 (546) 27.0 (686) 38.0 (965) 43.5 (1105) 54.5 (1384) 65.5 (1664)
Primary Coil Location H 1.81 (46) for 2- or 3-row primary coil; 2.81 (71) for 4-row primary coil
Secondary Coil - Standard Capacity 2.86 (73)
L
Secondary Coil - High Capacity 0.86 (22)
Secondary Coil - Standard Capacity 5.0 (127)
K
Secondary Coil - High Capacity 7.0 (178)

www.DaikinApplied.com 33 IM 1152-10 • HORIZONTAL FAN COILS

 Physical Data

Figure 41: Dimensions – Cabinet Fan Coil, Front Discharge – Rear Return

Control
Top Box
25.0
18.0
View
(4)
¾" Mounting
Holes

RefeRence Point
○
×

C.XX
2.375 D
4.5
NOTE: (1) Unit is shown with duct collar flanges for return and discharge openings

A Coil connections are 5/8" O.D.

S E S
15.28 F 15.28
RefeRence Point
○
×
2.23
3.98
5.48 6.48
8.91
Front 14.0
11.75
12.00
View

3.51

1.0 1.0 5.81

RefeRence Point
Back View 7.26
○
× 9.01

(8) 2" Piping (4) 1" Electrical Power 10.09

1.63 1.65
Side 7.55 8.82
Knockouts Knockouts
12.04
(4) 2" Drain
View Knockouts

4.88

3.53

S02 S03 S04 S06 S08 S10 S12

Dimension
inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm)
Overall Unit Width A 47.64 (1210) 47.64 (1210) 53.14 (1350) 64.14 (1629) 69.64 (1769) 80.63 (2048) 91.64 (2328)
Mounting Hole Distance D 40.64 (1032) 40.64 (1032) 46.14 (1172) 57.14 (1451) 62.64 (1591) 73.64 (1870) 84.64 (2150)
Return Air Opening - Width E 19.0 (483) 19.0 (483) 22.9 (581) 34.5 (876) 38.4 (975) 50.0 (1270) 61.6 (1565)
Discharge Opening - Width F 17.09 (434) 17.09 (434) 22.59 (574) 33.59 (853) 39.09 (993) 50.09 (1272) 61.09 (1552)
Return Air Opening Location S 14.32 (364) 14.32 (364) 15.13 (384) 14.82 (376) 15.63 (397) 15.32 (389) 15.01 (381)

IM 1152-10 • HORIZONTAL FAN COILS 34 www.DaikinApplied.com

 Physical Data

Figure 42: Dimensions – Cabinet Fan Coil, Front Discharge – Bottom Return

Control
Top Box
25.0
18.0
View
(4)
¾" Mounting
Holes

RefeRence Point
○
×

C.XX
2.375 D
4.5 NOTE: (1) Unit is shown with duct collar flange for discharge opening

Coil connections are 5/8" O.D.

A

15.28 F 15.28
RefeRence Point
○
×
2.23
3.98
5.48 6.48
8.91
11.75
12.00
14.0

3.51
Bottom
5.81
View
Back View 7.26
9.01
Return 8.82
(8) 2" Piping (4) 1" Electrical Power 10.09
Knockouts Knockouts
12.04
S E S 2.36 (4) 2" Drain
Knockouts

1.0

RefeRence Point
○
×

1.63
7.55
Side
View
4.88

S02 S03 S04 S06 S08 S10 S12

Dimension
inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm)
Overall Unit Width A 47.64 (1210) 47.64 (1210) 53.14 (1350) 64.14 (1629) 69.64 (1769) 80.63 (2048) 91.64 (2328)
Mounting Hole Distance D 40.64 (1032) 40.64 (1032) 46.14 (1172) 57.14 (1451) 62.64 (1591) 73.64 (1870) 84.64 (2150)
Return Air Opening - Width E 18.5 (470) 18.5 (470) 22.88 (581) 34.5 (876) 38.38 (975) 50.0 (1270) 61.63 (1565)
Discharge Opening - Width F 17.4 (442) 17.4 (442) 22.98 (588) 33.59 (853) 39.39 (1001) 50.39 (1280) 61.09 (1552)
Return Air Opening Location S 14.57 (370) 14.57 (370) 15.13 (384) 14.82 (376) 15.63 (397) 15.32 (389) 15.01 (381)

www.DaikinApplied.com 35 IM 1152-10 • HORIZONTAL FAN COILS

 Physical Data

Figure 43: Dimensions – Cabinet Fan Coil, Bottom Discharge – Rear Return

Control
Top Box
35.0
28.0
View
(4)
¾" Mounting
Holes

REFERENCE POINT
○
×

C.XX
2.375 D
4.5

Coil connections are 5/8" O.D.

A
15.28 F 15.28 S E S
REFERENCE POINT
2.73
○
×
2.23
3.98
5.48 6.48
8.91
Bottom Discharge 7.5 Return 11.75
12.00
View 14.0
15.14

3.51
5.81

Back View 7.26

15.2 9.01

(8) 2" Piping (4) 1" Electrical Power 10.09

Knockouts Knockouts
12.04
(4) 2" Drain
Knockouts

REFERENCE POINT
○
×
1.65

8.82 Side
View
3.53

S02 S03 S04 S06 S08 S10 S12

Dimension
inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm)
Overall Unit Width A 47.64 (1210) 47.64 (1210) 53.14 (1350) 64.14 (1629) 69.64 (1769) 80.63 (2048) 91.64 (2328)
Mounting Hole Distance D 40.64 (1032) 40.64 (1032) 46.14 (1172) 57.14 (1451) 62.64 (1591) 73.64 (1870) 84.64 (2150)
Return Air Opening - Width E 16.22 (412) 16.22 (412) 21.7 (552) 32.72 (831) 38.22 (971) 49.22 (1250) 60.22 (1530)
Discharge Opening - Width F 17.09 (434) 17.09 (434) 22.59 (574) 33.59 (853) 39.09 (993) 50.09 (1272) 61.09 (1552)
Return Air Opening Location S 14.32 (364) 14.32 (364) 15.13 (384) 14.82 (376) 15.63 (397) 15.32 (389) 15.01 (381)

IM 1152-10 • HORIZONTAL FAN COILS 36 www.DaikinApplied.com

 Physical Data

Figure 44: Dimensions – Cabinet Fan Coil, Bottom Discharge – Bottom Return

Return

Control
Top Box
35.0
28.0
View
(4)
¾" Mounting
Holes

REFERENCE POINT
○
×

C.XX
2.375 D
4.5

Coil connections are 5/8" O.D.

A
15.28 F 15.28
REFERENCE POINT
2.73
○
×
2.23
3.98
5.48 6.48
7.5 8.91
Discharge 11.75
12.00
14.0
15.14

3.51
Bottom
5.81
View
15.2
Back View 7.26
9.01

(8) 2" Piping (4) 1" Electrical Power 10.09

Knockouts Knockouts
12.04
(4) 2" Drain
Return 8.82
Knockouts

S E S 2.36

Side
View

S02 S03 S04 S06 S08 S10 S12

Dimension
inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm)
Overall Unit Width A 47.64 (1210) 47.64 (1210) 53.14 (1350) 64.14 (1629) 69.64 (1769) 80.63 (2048) 91.64 (2328)
Mounting Hole Distance D 40.64 (1032) 40.64 (1032) 46.14 (1172) 57.14 (1451) 62.64 (1591) 73.64 (1870) 84.64 (2150)
Return Air Opening - Width E 16.22 (412) 16.22 (412) 21.7 (552) 32.72 (831) 38.22 (971) 49.22 (1250) 60.22 (1530)
Discharge Opening - Width F 17.09 (434) 17.09 (434) 22.59 (574) 33.59 (853) 39.09 (993) 50.09 (1272) 61.09 (1552)
Return Air Opening Location S 14.32 (364) 14.32 (364) 15.13 (384) 14.82 (376) 15.63 (397) 15.32 (389) 15.01 (381)

www.DaikinApplied.com 37 IM 1152-10 • HORIZONTAL FAN COILS

 Physical Data

Figure 45: Dimensions – Recessed Cabinet Fan Coil with Ceiling Plate

25.0 29.5

NOTES: (1) See sheet #1 for unit dimensions

(2) For installations with height restrictions below
4.5 14", use the fixed trim flange accessory

2.0 typ. Metal or Wood Stud Frame

7.0 X 7.0 Multi-purpose Screw
2.0 typ.
Y

Bottom View Unit Cabinet

Ceiling Material 1/4" Gap

Trim Flange

Trim Flange Securing Detail

NOTE: Max 1/4" all-around gap is recommended between
Unit
the cabinet unit and the trim flange
Cabinet
14.5" min.
16.0" max.

3.0

Detail A
Floating Ceiling Panel
Detail A
Side View Plate to cabinet connection for fully recessed units

Figure 46: Dimensions – Trim Flange Mount

25.0 29.5

NOTES: (1) See sheet #1 for unit dimensions

(2) For installations with height restrictions below
4.5 14", use the fixed trim flange accessory

2.0 typ. Metal or Wood Stud Frame

7.0 X 7.0 Multi-purpose Screw
2.0 typ.
Y

Bottom View Unit Cabinet

Ceiling Material 1/4" Gap

Trim Flange

Trim Flange Securing Detail

NOTE: Max 1/4" all-around gap is recommended between
Unit
the cabinet unit and the trim flange
Cabinet
14.5" min.
16.0" max.

3.0

Floating Ceiling Panel

Detail A Detail A
Plate to cabinet connection for fully recessed units
Side View

IM 1152-10 • HORIZONTAL FAN COILS 38 www.DaikinApplied.com

 Factory-Installed Valve and Piping Packages

Factory-Installed Valve and Available Packages

Piping Packages All factory-installed valve packages are flexible, configurable
and fully software-selectable in our Daikin Applied Tools™
Factory valve and piping packages are available for both selection program. Custom valve packages are available also.
two-pipe and four-pipe systems with either right or left hand Numerous piping packages are available to match design
connections. Four-pipe systems can be configured with the configurations. Additional components can be added to meet
heating and cooling connections on the same or opposite exact requirements, including P/T ports, unions, and flexible
sides of the unit. Packages can be either factory-installed or stainless steel hoses.
factory-assembled and shipped loose with the unit. All factory-
assembled packages are fully leak tested. Units are also Basic Packages
available without valve and piping packages in either a right-
Basic valve and piping packages add control valves to the
hand or left-hand configurations.
Shut-Off Only package. All Daikin Applied control valves are
Factory-installed packages are soldered to the coil and wired to factory-mounted in the supply water pipe. See Control Valve
the unit control box, MicroTech controller or LV Interface Board. Options on page 41 for more information on the variety of
For field-installed packages, chilled and hot water pipes are the control valves available.
only field connections required. Piping is 1/2" nominal copper
(5/8" OD). Figure 48: Basic Package

Figure 47: Four-Pipe Deluxe Valve and Piping Package C

O
I
L

(See Figure 52 for components key)

Pre-determined field connection points are located for easy

access. The installing contractor can pre-pipe the building
water connections before the units arrive on the jobsite. A label
clearly identifies chilled and hot water connection points on
every unit.
All chilled water piping and components are located to allow
condensate to drain into the secondary drain pan supplied with
the valve package. Insulation of the factory piping package is
not required.

www.DaikinApplied.com 39 IM 1152-10 • HORIZONTAL FAN COILS

 Factory-Installed Valve and Piping Packages

Enhanced Packages Deluxe Packages

Enhanced valve and piping packages add a strainer to the Deluxe valve and piping packages add a strainer to the
Basic package supply water pipe. The strainer body is cast Premium package. The strainer is available with or without an
brass construction with a stainless steel mesh that is easy to optional draining (blow-off) valve.
remove for cleaning.
Figure 51: Deluxe Package
Figure 49: Enhanced Package
C
C O
O I
I L
L
(See Figure 52 for components key)
(See Figure 52 for components key)
Figure 52: Components Key for Schematics
Premium Packages
Premium valve and piping packages replace the Basic Manual Shutoff Ball Valve: Water shut-off.
Handle rotates 90 degrees.
package a ball valve in the return line with a manual or
automatic circuit setter. The manual circuit setter is also known Manual Shutoff Ball Valve with Memory
as a manual flow control valve. The auto circuit setter acts as Stop: Used on return line for limiting water
flow.
both a flow setting device and a shut-off valve. It allows water
flow through the fan coil to be set quickly and accurately. The 2-Way, ON/OFF Spring Return,Valve,
(N.C. or N.O.): Turns ON or OFF water flow
circuit setter includes a cartridge within the valve body that is to the coil in response to 24V or line voltage
signal.
sized to allow a specific flow rate through the coil without any
action required by a system piping balancer. 3-Way, ON/OFF Spring Return,Valve,
(N.C. or N.O.): Diverts water flow to the coil
P/T ports are included, which are used to measure the or the bypass in response to 24V or line
voltage signal.
temperature or pressure drop across the valve. This pressure
drop can be compared to factory supplied tables that relate the 2-Way Modulating Valve (Floating point
pressure drop to a specific flow rate. The manual circuit setter or proportional): Modulates the flow of
water through the coil in response to 24V or
valve also has a memory stop so that the correct setting can 0-10VDC signal.
be found quickly.
3-Way Modulating Valve (Floating point
or proportional): Modulates the flow of
water through the coil in response to 24V or
Figure 50: Premium Package 0-10VDC signal.

C PT Port: For connecting a pressure or

temperature gauge.
O
I Y-Strainer: Removable screen filters out
small particles from supply line during
L normal system operation.

Manually Adjustable Circuit Setter with

Shutoff: Pressure-dependent, ball-type,
(See Figure 52 for components key) manual flow control.

Cartridge-Type, Auto-Fixed Circuit Setter:

Pressure-compensated, automatic fixed-
flow control.

Union: For easy removal of piping from coil.

Bypass Balancing Valve: Adjustable

balancing of water flow through the bypass
circuit on a 3-way control valve.
Note: Daikin Applied 3-way valves are equipped with a fixed balance orifice in the bypass line,
eliminating the need for a separate balancing valve.

IM 1152-10 • HORIZONTAL FAN COILS 40 www.DaikinApplied.com

 Factory-Installed Valve and Piping Packages

Control Valve Options

Except for Shut-off Only packages, all valve and piping Two-Way Modulating Valves
packages include control valves for controlling water flow.
All Daikin Applied control valves are factory assembled and These valves modulate the water flow through the coil in
mounted in the supply water pipe downstream of the coil. response to a signal from the Daikin Applied thermostat
Several options are available: or controller. Standard Daikin Applied modulating valves
are three-wire floating point valves. Zero to 10 VDC equal
percentage proportional valves are also available. The
Two-Way Two-Position Valves modulating valves are factory mounted in the supply water pipe
These valves will be either Fully-Open or Fully-Closed in upstream of the coil. Daikin modulating valves are failed-in-
response to a line voltage (115, 208-230 or 265-277 VAC) place type.
or 24 VAC signal from the Daikin Applied thermostat or
MicroTech controller. Some means of relieving pump head Three-Way Modulating Valves
pressure should be applied when two-way valves are selected.
Normally-Open or Normally-Closed valves are available, both These valves modulate water flow through a coil in response to
spring-return type. a signal from a Daikin Applied thermostat or controller. Three-
way valves allow water that is directed through the coil to mix
with water that is directed through the bypass line. This mixture
Three-Way Two-Position Valves exits through the leaving water pipe. Modulating valves are
These valves either allow full water flow through the coil or three-wire, floating-point valves or 0-10 VDC equal percentage
divert the flow through a bypass line. The valves respond to a proportional. The modulating valves are factory mounted in
line voltage (115, 203-230 or 265-277 VAC) or to 24 VAC signal the supply water pipe upstream of the coil. Daikin Applied
from the Daikin Applied thermostat or MicroTech controller. All modulating valves are failed-in-place type.
standard three-way valves come with a fixed-balance orifice in
a bypass line to compensate for flow balancing in the bypass Selecting Correct Size Modulating
position, eliminating the need for an additional balancing valve.
Normally-Open or Normally-Closed valves are available. Valves
Daikin Applied Tools software automatically selects the best
modulating valve size for the unit and coil being considered. By
combining the ARI performance data, the coil flow rate and the
DP across the water coil, the water coil Cv is calculated and
the best matching modulating port size is selected. Valve and
piping packages can easily be configured and automatically
selected using Daikin Applied Tools.
NOTE: MicroTech controllers do not currently support 0-10
VDC Proportional valves.

www.DaikinApplied.com 41 IM 1152-10 • HORIZONTAL FAN COILS

 Factory-Installed Valve and Piping Packages

Figure 53: Factory-installed Valve & Piping Packages (right-hand shown)

Connecting
ConnectingPipe
PipeLocations:
Locations: 2-Pipe
2-Pipe Cooling or Heating
Cooling Only, Right-hand
Deluxe Package shown
Deluxe Package shown, see schematic (page 2) for the list of components selected for this package

5.38
3.42
REFERENCE POINT
○
×

Primary
Supply
Front
View

Primary
Return

0.56‡
1.5†
7.0

20.25
B † Overflow Connection
A ‡ Drain Connection
REFERENCE POINT
○
×

4.43
Primary

End 5.5
Supply

View
10.42 11.1

10.8
Primary
Return
10.58†

Primary Package Connections from Reference Point

Name Component Description (2- & 3-row Coil)
Supply (A)* Return (B)*
Basic 2W 2Way control valve, shut-off valves 12.2 16.2
Basic 3W 3Way control valve, shut-off valves 12.2 17.0
Enhanced 2W 2Way control valve, shut-off valves, strainer 15.8 16.3
Enhanced 3W 3Way control valve, shut-off valves, strainer 15.8 17.0
Premium 2W, auto flow 2Way control valve, shut-off valves, auto flow-setter 12.3 15.8
Premium 2W, manual flow 2Way control valve, shut-off valves, manual flow-setter 12.3 16.6
Premium 3W, auto flow 3Way control valve, shut-off valves, auto flow-setter 12.2 14.8
Premium 3W, manual flow 3Way control valve, shut-off valves, manual flow-setter 12.2 15.6
Deluxe 2W, auto flow 2Way control valve, shut-off valves, strainer, auto flow-setter 15.8 15.8
Deluxe 2W, manual flow 2Way control valve, shut-off valves, strainer, manual flow-setter 15.8 16.6
Deluxe 3W, auto flow 3Way control valve, shut-off valves, strainer, auto flow-setter 12.2 14.8
Deluxe 3W, manual flow 3Way control valve, shut-off valves, strainer, manual flow-setter 12.2 15.6
NOTE: For 4-row Primary Coils add 1" to the dimensions A and B shown

IM 1152-10 • HORIZONTAL FAN COILS 42 www.DaikinApplied.com

 Factory-Installed Valve and Piping Packages

Figure 54: Factory-installed Valve & Piping Packages (right-hand shown), continued

Connecting Pipe
Connecting Locations:
Pipe 4-Pipe
Locations: Cooling
4-Pipe and
Cooling & Heating, Same-side Right-hand
Heating Same-side,
Deluxe Package shown
Deluxe Package shown, see schematic (page 2) for the list of components selected for this package

10.35
7.7
5.38 Primary
3.42 Supply
REFERENCE POINT
○
× Secondary
Return

Primary
Return

Secondary
Supply

0.56‡
1.5†
7.0
Front View

† Overflow Connection
20.25 ‡ Drain Connection
B K C
A D
REFERENCE POINT REFERENCE POINT
○
× ○
×

4.4
Secondary X
Primary Return
Supply
5.5
11.1
10.42
10.8 7.9
Primary
Return

10.58†
Secondary
Supply

Primary Piping End View Secondary Piping End View

Primary Package
Secondary Package Secondary Coil Connection
Connections from Reference
Length from Reference Point
Point (2- & 3-row Coil)
Name Component Description
High Standard
Return Supply Preheat Reheat
Supply (A)* Return (B)* Capacity Capacity
(C) (D) (K) (K)
(X) (X)
Basic 2W 2Way control valve, shut-off valves 12.2 16.2 6.5 7.1
Basic 3W 3Way control valve, shut-off valves 12.2 17.0 9.0 7.1
Enhanced 2W 2Way control valve, shut-off valves, strainer 15.8 16.3 6.5 10.7
Enhanced 3W 3Way control valve, shut-off valves, strainer 15.8 17.0 9.0 10.7
Premium 2W, auto flow 2Way control valve, shut-off valves, auto flow-setter 12.3 15.8 6.1 7.1
Premium 2W, manual flow 2Way control valve, shut-off valves, manual flow-setter 12.3 16.6 10.6 7.1
4.53 1.03 0.8 2.8
Premium 3W, auto flow 3Way control valve, shut-off valves, auto flow-setter 12.2 14.8 5.1 7.1
Premium 3W, manual flow 3Way control valve, shut-off valves, manual flow-setter 12.2 15.6 9.6 7.1
Deluxe 2W, auto flow 2Way control valve, shut-off valves, strainer, auto flow-setter 15.8 15.8 6.1 10.7
Deluxe 2W, manual flow 2Way control valve, shut-off valves, strainer, manual flow-setter 15.8 16.6 10.6 10.7
Deluxe 3W, auto flow 3Way control valve, shut-off valves, strainer, auto flow-setter 12.2 14.8 5.1 10.7
Deluxe 3W, manual flow 3Way control valve, shut-off valves, strainer, manual flow-setter 12.2 15.6 9.6 10.7
NOTE: For 4-row Primary Coils add 1" to the dimensions A and B shown

www.DaikinApplied.com 43 IM 1152-10 • HORIZONTAL FAN COILS

 Wiring Diagrams

Wiring Diagrams
Figure 55: Fan Coil Wiring Diagram – Typical Low Voltage Interface Board and PSC, Intermediate Electric Heat, F/A
Damper, 3-Speed Switch–Unit Mounted

IM 1152-10 • HORIZONTAL FAN COILS 44 www.DaikinApplied.com

 Wiring Diagrams

Figure 56: Fan Coil Wiring Diagram – Typical Low Voltage Interface Board and PSC, Intermediate Electric Heat, F/A
Damper, 3-Speed Switch–Unit Mounted

www.DaikinApplied.com 45 IM 1152-10 • HORIZONTAL FAN COILS

 Wiring Diagrams

Figure 57: Fan Coil Wiring Diagram – Typical Low Voltage Terminal Strip and ECM, Intermediate Electric Heat, F/A Damper,
3-Speed Switch–Unit Mounted

IM 1152-10 • HORIZONTAL FAN COILS 46 www.DaikinApplied.com

 Wiring Diagrams

Figure 58: Fan Coil Wiring Diagram – Typical Low Voltage Terminal Strip and ECM, Intermediate Electric Heat, F/A Damper,
3-Speed Switch–Unit Mounted

www.DaikinApplied.com 47 IM 1152-10 • HORIZONTAL FAN COILS

 Wiring Diagrams

Figure 59: Fan Coil Wiring Diagram – Typical MicroTech Controller with ECM and Economizer, Intermediate Electric Heat

IM 1152-10 • HORIZONTAL FAN COILS 48 www.DaikinApplied.com

 Wiring Diagrams

Figure 60: Fan Coil Wiring Diagram – Typical MicroTech Controller with ECM and Economizer, Intermediate Electric Heat,
continued

www.DaikinApplied.com 49 IM 1152-10 • HORIZONTAL FAN COILS

 Wiring Diagrams

Figure 61: Fan Coil Wiring Diagram – Unit Mounted 3 Speed Switch, Low Voltage Valves

IM 1152-10 • HORIZONTAL FAN COILS 50 www.DaikinApplied.com

 Model Number Description

Model Number Description

Table 3: Model Number Description: Fields 1—21
Field 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Code FC HC 1 02 A A G M Y YY W 3 12 R F T YY 12 Y Y N

1. Unit Type 12. Primary Coil Rows

• FC = fan coil • 2 = 2 row
• FH = cabinet unit heater • 3 = 3 row
2. Product Identifier • 4 = 4 row
• HC = horizontal, exposed 13. Primary Coil Fins Per Inch
• HH = horizontal, concealed • 12 = 12 fins per inch
3. Design Series 14. Primary Coil Connection Hand
• 1 = Design 1 • L = left hand
4. Unit Size - nominal capacity • R = right hand
• 02 = 200 cfm 15. Primary Coil Piping Package
• 03 = 300 cfm • F = factor installed
• 04 = 400 cfm • L = shipped loose
• 06 = 600 cfm • Y = none
• 08 = 800 cfm 16. Primary Coil Connection Type
• 10 = 1000 cfm • S = sweated
• 12 = 1200 cfm • T = threaded
5. Volts/Hertz/Phase • N = none
• A = 115/60/1 17. Preheat Coil Type
• E = 208-230/60/1 • E1 = electric single stage
• J = 265-277/60/1 • M1 = intermediate electric single-stage
6. Coil fin type • W1 = water standard capacity
• A = aluminum • W2 = water high capacity
7. Coil casing material • S1 = standard capacity
• G = galvanized • S2 = high capacity
8. Coil air vent • YY = none
• M = manual 18. Preheat Coil Fins Per Inch
• A = auto • 12 = 12 fins per inch
9. Coil coating 19. Preheat Coil Connection Hand
• Y = none • L = left hand
10. Not currently used • R = right hand
• YY = none • Y = none
11. Primary Coil Type 20. Preheat Coil Piping Package

• C = chilled water only • F = factor installed

• W = CW/HW 2-pipe • L = shipped loose
• H = hot water only • Y = none
• S = steam 21. Preheat Coil Connection Type
• S = sweated
• T = threaded
• N = none

www.DaikinApplied.com 51 IM 1152-10 • HORIZONTAL FAN COILS

 Model Number Description

Table 4: Model Number Description: Fields 22—41

Field 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
Code YY W1 12 R F T Y 000 Y P PSC S 3 Q Y MR Y D Y R

22. Not currently used 30. Not currently used

• YY = none • YY = none
23. Reheat Coil Type 31. Drain Pan Material
• W1 = water standard capacity • G = galvanized
• W2 = water high capacity • S = stainless steel
• S1 = standard capacity 32. Blower Motor Type
• S2 = high capacity • PSC = PSC motor
• YY = none • ECM = ECM motor
24. Reheat Coil Fins Per Inch • XXX = special
• 12 = 12 fins per inch 33. Discharge Conditions
25. Reheat Coil Connection Hand • S = standard static
• L = left hand • H = high static
• R = right hand 34. Motor Speed
• Y = none • 3 = 3 speed
26. Reheat Coil Piping Package 35. Motor Connections
• F = factor installed • Q = quick connect
• L = shipped loose 36. Not currently used
• Y = none • YY = none
27. Reheat Coil Connection Type 37. Fresh Air Damper
• S = sweated • MR = manual rear
• T = threaded • 2R = automatic, 2-position, rear
• N = none • ER = automatic, economizer
28. Electric Heat Power Supply • XX = special
• A = 115-60-1 • YY = none
• E = 208-230/60/1 38. Not currently used
• J = 277-265/60/1 • YYY = none
• Y = None 39. Unit Disconnect Switch
29. Electric Heat Wattage
• D = toggle disconnect switch
• 005 = 0.5 kW electric heat • X = special
• 010 = 1.0 kW electric heat • Y = none
• 015 = 1.5 kW electric heat 40. Site Control Voltage
• 020 = 2.0 kW electric heat
• L = 24V (low) voltage
• 025 = 2.5 kW electric heat
• H = line voltage
• 030 = 3.0 kW electric heat
41. Control Type
• 040 = 4.0 kW electric heat
• A = analog
• 050 = 5.0 kW electric heat
• D = digital
• 060 = 6.0 kW electric heat
• L = Digital Ready (low-voltage interface board /
• 080 = 8.0 kW electric heat
terminal strips) and 3-speed switch
• 100 = 10.0 kW electric heat
• M = MicroTech III
• 000 = None
• R = Digital Ready (low-voltage interface board /
terminal strips)
• S = 3-speed switch
• X = Special
• Y = None

IM 1152-10 • HORIZONTAL FAN COILS 52 www.DaikinApplied.com

 Model Number Description

Table 5: Model Number Description: Fields 42—56

Field 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
Code Y Y Y RL MOR Y 3MOU YYYY 3MOU Y Y C Y Y Y

42. Network Communication Card 47. Timed Override

• Y = none • Y = none
43. Changeover Type 48. Valve - Primary Coil
• Y = none • See Table 4
• A = auto 49. Valve - Preheat Coil
• M = manual • See Table 4
• U = user selectable 50. Valve - Reheat Coil
44. Programmability • See Table 4
• Y = none 51. Future Control Function
45. Setpoint Adjustment • Y = None
• YY = none 52. Low Temperature Protection
• UL = unit-mounted, +/- 3 degrees • A = auto
• UF = unit-mounted, full range • Y = None
• RL = remote-mounted, +/- 3 degrees • X = special
• RF = remote-mounted, full range 53. Condensate Overflow Protection
46. Fan Speed Control
• C = condensate overflow protection
• YYY = None • Y = None
• MBU = manual, off/low/med/high, • X = special
unit-mounted
54. Discharge Air Thermistor
• MBR = manual, off/low/med/high,
remote-mounted • Y = None
• X = special
55. Smoke Input Sensor
• Y =none
• X = special
56. Occ / Vacant Control Input
• Y = none
• X = special

www.DaikinApplied.com 53 IM 1152-10 • HORIZONTAL FAN COILS

 Model Number Description

Table 6: Model Number Description: Fields 57—72

Field 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
Code Y Y Y Y S 18 P I 00 S 00 00 30F TA FR 1

57. Filter Status Sensor 68. Right Hand End Pocket Extension
• Y = none • 00 = none
• X = special • 04 = 4 inch extended length
58. Fan Status Sensor 69. Subbase (not applicable)
• Y = none 70. Discharge Air - Outlet
• X = special • BA = bottom discharge with double deflection
59. Future Control Function grille
• Y = none • BD = bottom discharge with duct collar
60. Future Control Function • BP = open bottom discharge
• BS = bottom discharge with stamped louver grille
• Y = none
• FA = front discharge with double deflection grille
61. Cabinet Style
• FD = front discharge with duct collar
• S = standard
• FP = open front discharge
• T = tamperproof
• FS = front discharge with stamped louver grille
• Y = none
• XX = special
62. Cabinet Gauge
71. Return Air Inlet
• 16 = 16 gauge
• BS = bottom inlet with stamped louver
• 18 = 18 gauge
• BD = bottom inlet with duct collar (plenum)
• YY = none
• RD = rear inlet with duct collar (plenum)
• XX = special
• RS = rear inlet with stamped louver
63. Cabinet Coating Type
• XX = special
• B = powder coat
• YY = no plenum (open return)
• Y = none
72. Filter
64. Color- Cabinet
• 1 = 1 inch Throwaway Filter
• I = antique ivory
• 3 = 1 inch Throwaway + (1) Extra
• W = off white
• G = soft gray
• C = cupola white
• P = putty beige
• Y = none
• X = special
65. Cabinet Depth Extension
• 00 = none
66. Unit Lineup Position
• S = standalone
67. Left Hand End Pocket Extension
• 00 = none
• 04 = 4 inch extended length

IM 1152-10 • HORIZONTAL FAN COILS 54 www.DaikinApplied.com

 Model Number Description

Table 7: Model Number Description: Fields 73—78

Field 73 74 75 76 77 78
Code YYY Y A S Y 1

73. Special Options 77. Extended Warranty

• YYY = none • Y = none (standard warranty)
74. Reserved for future use • 1 = 1 year Extended component warranty
(30 month from shipment or 24 month from
• Y = none
installation)
75. Agency Listing
• 2 = 2 year Extended component warranty
• A = ETL, CETL, ARI (42 month from shipment or 36 month from
• R = ETL, CSA installation)
• X = special • 3 = 3 year Extended component warranty
• Y = none (54 month from shipment or 48 month from
installation)
76. Packaging
• 4 = 4 year Extended component warranty
• S = Standard (66 month from shipment or 60 month from
• T = palletized based on tagging and by floor installation)
• X = special
78. Product Style
• 1 = Style 1

Figure 62: Model Number Detail — Valve Package Fields 48—50

3 O M U

Coil Valve Type

• Y = none
• 2 = two-way
• 3 = three way
Unpowered Position
• Y = none
• C = closed
• O = open
Control Type
• Y = none
• E = EOC (two-position)
• M = modulating
Actuator Input
• Y = None
• L = Low Voltage (24 Volt)
• U = Unit Voltage
• P = 0-10V Proportional
• F = 3 Wire Floating Point

www.DaikinApplied.com 55 IM 1152-10 • HORIZONTAL FAN COILS

 Addendum Material

IM 1152-10 • HORIZONTAL FAN COILS 56 www.DaikinApplied.com

 Addendum IM 1014 — MT155

Installation and Maintenance Manual IM 1014

Group: Applied Air Systems
Part Number: 910102989
Date: October 2013

MT 155 Thermostat

Installation
DANGER 1. Install the thermostat with the two furnished mounting
screws to a standard 2" × 4" electrical box, 4-11/16" ×
READ THESE INSTRUCTIONS CAREFULLY BEFORE 21/8" square device box with a 2" x 4" adapter ring or
ATTEMPTING TO INSTALL, OPERATE OR SERVICE to a 4" × 4" box with accessory adapter plate.
THIS THERMOSTAT.
2. For wall installations, mount the thermostat on an
Failure to observe safety information and comply with inside wall approximately 5 feet above the floor. The
instructions could result in PERSONAL INJURY, DEATH location should provide circulation at average room
AND/ OR PROPERTY DAMAGE. temperature. Avoid direct sunlight or sources of hot or
To avoid electrical shock or damage to equipment, cold air in the room or wall.
disconnect power before installing or servicing. Use only 3. Remove the knob and then the cover. Mount
wiring with insulation rated for full thermostat operating thermostat base assembly to the outlet box using the
voltage. Use copper wire only. Insulate or wirenut all un- screws provided, tighten the screws evenly but do not
used leads. Any wiring, including the remote probe,may over tighten. Make wiring connections as noted.
carry the full operating voltage of the thermostat.
4. To use a remote sensor, remove jumper JP-1 to
To avoid potential fire and/ or explosion do not use in disable local sensing. See Figure 1. Failure to remove
potentially flammable or explosive atmospheres. Retain JP-1 when using a remote sensor will cause improper
these instructions for future reference. You must review operation of the thermostat. Some units do not have
your application and national and local codes to ensure remote sensing capability. See Application Notes.
that your installation will be functional and safe.
5. Reinstall the cover assembly. Install cover locking
screw provided. Reinstall the knob.
Figure 1: Removing Jumper JP-1
INSTALL COVER 6. Checkout: After wiring and installation are complete,
LOCKING SCREW
energize the system and check the operation. Adjust
the thermostat as necessary to complete at least one
cycle. Be sure the thermostat and all other equipment
are functioning correctly.
IM 1014 MTA/B 155 Thermostat

REMOVE JP1
JP1

WHEN USING A
REMOTE SENSOR

IM 1152-10 57
Addendum IM 1014 — MT155

Thermostat Operation Application Notes

Temperature Range: 50°F - 90°F (10°C - 32°C)
1. To use a remote sensor, remove jumper JP-1 to disable
TA155: A HEAT-OFF-COOL system switch manually selects local sensing. See Figure 1. Failure to remove JP-1
heating or cooling mode. In the HEAT position, only the heat when using a remote sensor will cause improper
output cycles with demand. In the COOL position, only the cool operation of the thermostat. Some units do not have
output cycles with demand. In the OFF position, heating and remote sensing capability.
cooling outputs are off. Units with a two position system switch 2. Units with remote sensing capability have a four-position
or without a system switch must use a load transfer switch terminal block at TB1. If TB1 is two position the unit is
when both heating and cooling outputs are used. This prevents local sensing only.
control failure and equipment damage caused by direct cycling
3. Remote probe wiring should be located away from any
between loads.
electrical motors or power wiring
TB155: An ON-OFF system switch enables auto-changeover of
4. Some units are internally wired for permanent fan
heating and cooling modes. In the ON position the thermostat
continuous operation.
activates heating or cooling outputs dependant upon the
relationship between set point and ambient temperature. Heat 5. On units with a Fan Supply input, the operation of the fan
on to cool on dead band is 4°F. In the OFF position, heating is determined by wiring connection. For fan continuous,
and cooling outputs are off. Units without a system switch cycle jumper the Fan Supply input (TB2-5) to the Switched
between heating and cooling with a 4°F dead band. Power output (TB3-3).
FAN: Some units have a switch for manual selection of fan 6. For fan cycling operation with a call for heat or cool, a fan
speed. On these units fan operation is either internally wired for relay must be used.
fan continuous operation or is dependant upon connection to 7. Observe electrical ratings. Thermostatic outputs are pilot
the fan supply input . When internally wired for fan continuous duty only.
operation, the fan will be off when the system switch is off.
When dependant upon external connections the fan may not
be off with the system switch in the off position. The fan supply
input is switched to fan speed outputs (HI - MED - LO).
SWITCHED POWER: L1 power is switched to this output any
time the system switch is out of the OFF position.

Ratings
Table 1: Fan and system switches

Voltage Inductive Resistive Pilot Thermostatic

Rating FLA LRA Amps Duty Switching
24 VAC N.A. N.A. N.A. 24 VA 10 VA
120 5.8 34.8 6.0 125 VA 20 VA
240 2.9 17.4 5.0 125 VA 20 VA
277 2.4 14.4 4.2 125 VA 20 VA

Table 2: Wire Lead Colors (if applicable)

Wire Color Purpose
White with Orange Stripe Fan High
White with Red Stripe Fan Med.
White with Brown Stripe Fan Low
Red Heat
Blue Cool
Black L1
Yellow L2 or Neutral
Orange Switched Power
Violet Fan Supply
Brown Remote Probe
Brown Remote Probe

IM 1014 • MT A/B 155 THERMOSTAT 2 www.DaikinApplied.com

58 IM 1152-10
 Addendum IM 1014 — MT155

Wiring Diagrams
Figure 2: Units with remote sensing capability Figure 4: Units with no switches with local/remote sensing
capability
TB3-1 HEAT
OUTPUT

TB3-2 COOL
TB3-1 HEAT
TB3 OUTPUT OUTPUT
1

TB3-3
2 3

SWITCHED POWER TB3-2 COOL

TB3 OUTPUT
TB2-1 L1

1
TB2

2 3
L2 or NEUTRAL TB1-4 TB2-2 FAN HIGH TB3-3
L1
1

CONNECT 5
TB2-3 FAN MED
2 3

NO CONNECTION TB1-3 FAN FOR FAN

4

CONTINUOUS
TB2-4 FAN LOW
2 3

REMOTE PROBE 1 TB1-2

4

L2 or NEUTRAL TB1-4
5

REMOTE PROBE 2 TB1-1 TB2-5 FAN SUPPLY

TB1
1

NO CONNECTION TB1-3

4
2 3
REMOTE PROBE 1 TB1-2

REMOTE PROBE 2 TB1-1

TB1
1
Figure 3: Units with switches used for local sensing only
Figure 5: Units with no switches used for local sensing
TB3-1 HEAT
only
OUTPUT

TB3-2 COOL TB3-1 HEAT

TB3 OUTPUT OUTPUT
1
2 3

TB3-3 SWITCHED POWER

TB3-2 COOL
TB3 OUTPUT
TB2-1 L1

1
TB2
L2 or NEUTRAL TB2-2 FAN HIGH

2 3
TB1-4 TB3-3
1

CONNECT L1
TB2-3 FAN MED
2 3

NO CONNECTION TB1-3 FOR FAN

FAN
2

CONTINUOUS
TB2-4 FAN LOW
1

L2 or NEUTRAL TB1-4
5

TB2-5 FAN SUPPLY

TB1

NO CONNECTION TB1-3
2
1
TB1

IM 1014 (10/13) ©2013 Daikin Applied | (800) 432–1342 | www.DaikinApplied.com

IM 1152-10 59
 Addendum Material

IM 1152-10 • HORIZONTAL FAN COILS 60 www.DaikinApplied.com

 Addendum IM 1089 — MT155 A/B

Installation and Maintenance Manual IM 1089

Group: Applied Air Systems
Part Number: IM 1089
Date: October 2013

MT 155 A/B Thermostat Field Installation

24V Valve Packages on ThinLine™ Vertical Fan Coil Units with Factory-
Installed Low Voltage Interface Board

General Installation
DANGER
Two-pipe system (Cooling or Heating)
READ THESE INSTRUCTIONS CAREFULLY BEFORE
To field wire a T*155 thermostat (either as wall-mounted or
ATTEMPTING TO INSTALL, OPERATE OR SERVICE
unit-mounted) and field-install valve package for a 2-pipe
THIS THERMOSTAT.
system the following accessories are required:
Failure to observe safety information and comply with
• Single-Pole Double-Throw Automatic Changeover
instructions could result in PERSONAL INJURY, DEATH
Switch (SPDT ACO Kit P/N 039398600)
AND/ OR PROPERTY DAMAGE.
• Thermostat TA155 (kit) – PN 107345302 or
To avoid electrical shock or damage to equipment, Thermostat TB155 (kit) – PN 107345304
disconnect power before installing or servicing. Use only
wiring with insulation rated for full thermostat operating • 10K Return Air Sensor - PN 107345501
voltage. Use copper wire only. Insulate or wire-nut all un-
Step 1: Installing NC (Normally Closed)
used leads. Any wiring, including the remote probe, may
carry the full operating voltage of the thermostat. To avoid valve packages
potential fire and/ or explosion do not use in potentially • Solder the appropriate inlet and outlet pipe
flammable or explosive atmospheres. Retain these connections from the valve package to the coil
instructions for future reference. You must review your connections. Refer to Figures 1, 2, 3 and 4.
application and national and local codes to ensure that • Snap-on the SPDT ACO Switch on the supply side of
your installation will be functional and safe. the valve package (SPDT ACO Kit P/N 039398600 to
be ordered as field-installed option)
CAUTION • Cut white wire 60 of the wiring harness leading from
Care should be used to avoid electrostatic discharge to the Low Voltage Interface Board terminal connection
the microprocessor. (see Fig. 1) prior to attaching the quick-connect
This unit has configuration dip switches and jumpers. connector of the On-Off valve actuator to the interface
You may need to reconfigure the thermostat for your board (Fig. 3). The white wire lead going to the
application. actuator will be connected to terminal No. 1 of the
ACO switch (see Fig. 5):
— Terminal No. 1: black wire - to be connected to
the valve side (G terminal) with white wire of the
terminal strip
— Terminal No. 2: red wire – to be connected to the
IM 1089 MT A/B Thermostat: Field Installation

red wire (TB3-1) of the thermostat

— Terminal No. 3: blue wire – to be connected to the
blue wire (TB3-2) of the thermostat

IM 1152-10 61
Addendum IM 1089 — MT155 A/B

Figure 1: Automatic changeover connection between the valve actuator and the interface board
Cap the
wire

RED to TB3 - 1
WHITE 60 BLACK of T-stat WHITE
ACO to TB3 - 2 CLG +
BLUE of T-stat
G0 WHITE 61
CLG –
WHITE 62
COM
Valve
Acuator
Wiring Harness LV
Board

Step 2: Provide power to thermostat

• Connect a wire from thermostat terminal TB1- 4 (L2 • Connect a wire from thermostat terminal TB2- 24 ( Low
Neutral) to the common terminal on Low Voltage Interface fan speed) to the Low terminal
Board (terminal C ) Refer to Figures 2 and 4. • Remove Jumper JP1 to allow the remote mounted 10K
• Connect a wire from thermostat terminal TB2- 1 (24VAC) Return Air Sensor to operate.
to the 24 V terminal connection R. • Mount the 10K Return Air Sensor (PN 107345501) above
• Connect fan speed wires from the thermostat to the filter through the knockout provided Note: (1) If a
appropriate Low Voltage Interface Board terminals: fan coil unit is to be used for heating or cooling only, the
• Connect a wire from thermostat terminal TB2- 2 ( High SPDT ACO Switch (SPDT ACO Kit P/N 039398600) is not
fan speed) to the HI terminal required. For such applications just follow Step 2.
• Connect a wire from thermostat terminal TB2- 3 ( Med fan
speed) to the Med terminal

Figure 2: Low Voltage Interface Board shown with all additional support options
Line Voltage

Hi-Med-Lo Fan
motor control

FA
Clg. 24vac valve actuators inputs

Htg. 24vac valve actuators inputs

Room air or return air temperature sensor

Wiring Harness
Clg. 24vac
valve actuators Pipe sensor or ACO switch
– with quick Condensate overflow sensor output
connects t
Remote thermostat 24 VAC power
Htg. 24vac
valve actuators
– with quick
connects Unit mounted 24VA
LINE
sensor Changeover VOLTAGE
XFMR
pipe sensor
or switch Condensate overflow sensor

Available in Stock

IM 1089 • MT 155 A/B THERMOSTATS 2 www.DaikinApplied.com

62 IM 1152-10
 Addendum IM 1089 — MT155 A/B

Figure 3: Factory-installed and wired Low Voltage Interface Board (Wiring Diagram)

Figure 4: Thermostat TB155 autochangeover to be used with ON-OFF 24V valve packages, SPDT ACO and unit-mounted
Low Voltage Interface Board

Figure 5: Automatic changeover switch (SPDT ACO Kit P/N 039398600)

www.DaikinApplied.com 3 IM 1089 • MT 155 A/B THERMOSTATS

IM 1152-10 63
Addendum IM 1089 — MT155 A/B

Four-pipe system (Cooling and Heating)

Two piping packages will be required for CW and HW coils. Step 2: Provide power to thermostat
The following accessories needed for field-installed thermostat
model T*155 (unit-mounted or wall-mounted): • Connect a wire from thermostat terminal TB1- 4 (L2
Neutral)to the common terminal on the interface board
• Thermostat TA155 (kit) – PN 107345302 or Thermostat (terminal C) Refer to Figure 2 and 4.
TB155 (kit) – PN 107345304
• Connect a wire from thermostat terminal TB2- 1 (24VAC)
• 10K Return Air Sensor - PN 107345501 for unit-mounted tothe 24 V terminal connection R.
applications only (for wall-mounted applications the
• Connect fan speed wires from the thermostat to the
sensor is imbedded with the thermostat)
appropriate Low Voltage Interface Board terminals:
• Connect a wire from thermostat terminal TB2- 2 ( High
Step 1: Installing valve packages fan speed) to the HI terminal
• Solder the appropriate inlet and outlet CW pipe • Connect a wire from thermostat terminal TB2- 3 ( Med fan
connections from the valve package to the coil speed) to the Med terminal
connections.
• Connect a wire from thermostat terminal TB2- 24 ( Low
• Solder the appropriate inlet and outlet HW pipe fan speed) to the Low terminal
connections from the valve package to the coil
• Remove Jumper JP1 to allow the remote mounted the
connections.
10K Return Air Sensor to operate.
• Snap-on the Quick-connects of the valve actuators to the
• Mount the 10K Return Air Sensor (PN 107345501) above
appropriate terminals of the Low Voltage Interface Board
the filter through the knockout provided
as per Fig. 2.
NOTE: (2) For thermostats supplied by others refer to the
manufacturer’s installation literature and use this
manual as a guideline only.

IM 1089 (10/13) ©2013 Daikin Applied | (800) 432–1342 | www.DaikinApplied.com

64 IM 1152-10
 Addendum IM 1015 — MT158 A

Installation and Maintenance Manual IM 1015

Group: Applied Air Systems
Part Number: 910102990
Date: October 2013

MTA 158 Microprocessor Thermostat

ON/OFF Controller

Installation
DANGER 3. Remove the cover. Mount thermostat base assembly
to the outlet box using the screws provided, tighten
READ THESE INSTRUCTIONS CAREFULLY BEFORE the screws evenly but do not over tighten. Connect
ATTEMPTING TO INSTALL, OPERATE OR SERVICE wires as shown in the appropriate wiring diagram for
THIS THERMOSTAT. your thermostat style.
Failure to observe safety information and comply with 4. To use a remote sensor on units with local sensing
instructions could result in PERSONAL INJURY, DEATH capability, remove jumper JP-1 to disable local
AND/ OR PROPERTY DAMAGE. sensing. Failure to remove JP-1 will cause improper
To avoid electrical shock or damage to equipment, operation of the thermostat.
disconnect power before installing or servicing. Use only
wiring with insulation rated for full thermostat operating Figure 1: Wiring Diagram for ON/OFF Output
voltage. Use copper wire only. Insulate or wirenut all Configuration
unused leads. Any wiring, including the remote probe,may
C ONNE C T IONS
LINE V OLTAG E

L1 (HOT)
carry the full operating voltage of the thermostat. 1
To avoid potential fire and/ or explosion do not use in LO
2
potentially flammable or explosive atmospheres. MED L2 OR NEUTRAL
3 FAN
Retain these instructions for future reference. You must HIGH
review your application and national and local codes to 4
OR SINGLE SPEED FAN
ensure that your installation will be functional and safe.
24 VAC 1
5 24 VAC
CAUTION 24 VAC 2 XFMR
6
Care should be used to avoid electrostatic discharge to SETBACK INPUT
the microprocessor. 7
MAIN 1 MAIN 1
This unit has configuration jumpers. You may need to 10 OUTPUT
reconfigure this thermostat for your application. SEC 1 SECONDARY
11 1 OUTPUT
C ONNE C T IONS
LOW V OLTAG E

1. Install the thermostat with the two furnished mounting 12

IM 1015 MTA 158 Microprocessor Thermostat ON/OFF Controller

screws to a standard 4-11/16" × 2-1/8" square device

13
box with a 2" × 4” adapter ring.
2. For wall installations, mount the thermostat on an 14
inside wall approximately 5 feet above the floor. The 15 REMOTE PROBE
location should provide circulation at average room
temperature. Avoid direct sunlight or sources of hot or 16 PIPE SENSOR
cold air in the room or wall. 17

IM 1152-10 65
Addendum IM 1015 — MT158 A

Table 1: MTA 158 Operation*

Output OFF with Demand ON with Demand 5. Remove the LCD plastic protective film. Reinstall the
Main 1 ON ON cover assembly. Install the cover locking screw provided
(Terminal 10) at temperature demand at temperature demand in the hole at the left side of the control enclosure to
Main 2 complete the installation.
(Terminal 12) NA NA

Summer: OFF Summer: ON 6. Checkout: After wiring and installation are complete,
Secondary with heat demand with heat demand
(Terminal 11) energize the system and check the operation. Adjust the
Winter: Disabled Summer: Disabled
thermostat as necessary to complete at least one cycle.
Secondary 2
(Terminal 13)
NA NA Be sure the thermostat and all other equipment are
Note: * Operation determined by configuration. See Dip Switch Configuration Table. functioning correctly.

Thermostat Operation
These thermostats are designed to control ON-OFF, N.O. and Setback Operation
N.C. valves, relays and Erie® three wire floating valves. These
units may include a fan switch with one or more fan speed Connection of the Setback Input to 24 VAC 1 will force the
selections. control into unoccupied mode (see wiring diagram). Pressing
an arrow key or the mode button on the thermostat cover will
disable the setback input for one hour.
Mode Button Operation
OFF: All thermostat outputs are off, fan is still operational if Pipe Sensor Operation
connected to manual fan speed switch.
If cold water is detected, the system will operate in summer
AUTO: The thermostat automatically selects heating or cooling mode and the Main output will be cooling. If hot water is
mode depending on the set point and room temperature. The detected, the system will operate in winter mode, the Main
appropriate HEAT or COOL indicator is enabled in addition to output will be heating and First Stage Secondary Output will be
AUTO. A 3°F dead-band is provided to prevent short cycling disabled. In the case of an ambiguous reading, neither hot nor
between heating and cooling modes. After change-over the cold, the thermostat will initiate a purge cycle.
control points automatically shift so that the heating off-point or
the cooling off-point equals the setpoint temperature.
Ratings
COOL: The thermostat operates as a cooling-only thermostat.
by pressing the UP and DOWN arrows simultaneously. The Table 2: Fan and system switches
heating outputs are disabled.
Voltage Inductive Resistive Pilot Thermostatic
HEAT: The thermostat operates as a heating-only thermostat. Rating FLA LRA Amps Duty Switching
The cooling outputs are disabled. 24 VAC N.A. N.A. N.A. 24 VA 10 VA
120 VAC 5.8 34.8 6.0 125 VA NA
If constructed without a mode button, the thermostat operates
240 VAC 2.9 17.4 5.0 125 VA NA
in Auto mode, subject to configuration of the 2/4 pipe jumper
277 VAC 2.4 14.4 4.2 125 VA NA
and pipe sensor input.

Fan Speed Switch Operation

Fan speed is determined by manual selection from fan switch
OFF to HIGH, MEDIUM and/ or LOW. In units with the Cycling
Fan Option (demand output), the Fan operation (CYCLING vs.
CONTINUOUS) is determined by application connections. In
OFF position all outputs are off and display blank.

Up/ Down Arrow Operation

A first touch of either arrow will display the set point (a single
set point is employed for both heating and cooling). Continued
pressure on either arrow will scroll the set point to new values.
After three seconds with no pressure on either arrow, the
selected set point becomes effective and the display of the
room temperature resumes.

IM 1015 • MTA 158 MICROPROCESSOR THERMOSTAT 2 www.DaikinApplied.com

66 IM 1152-10
 Addendum IM 1015 — MT158 A

Service Menu Figure 3: Circuit Board Jumpers

Access: Press UP▲ and DOWN▼ arrows for 5 seconds. ON

1
DIP S WIT C H
Menu Selection: Select 1 to 5 by pressing the mode button or

2 3 4 5 6
by pressing the UP▲ and DOWN▼ arrows simultaneously.
Adjust Value: Use UP▲ or DOWN▼ arrow.
AUTO J P4
Item # Function Range Default 10 11 12 13 15 16 17
1 Zone Temp Offset -5.1°F to 5.1°F 0°F 5 6 7 1 2 3 4
2 Valve Stroke Time 30 sec. to 5 min. 120 sec.
3 Fan Delay to OFF 0 to 10 minutes 0 sec.
Compressor
4 Minimum OFF 30 sec. to 10 min. 120 sec.
Time

J P1
0 = Time Based
5 Purge Cycle 1 = Temperature 1
Based

Figure 2: Dipswitch Configuration Table 3: Circuit Board Jumper Configuration

ON
S E C ONDAR Y 1 OF F WIT H DE MAND S E C ONDAR Y 1 ON WIT H DE MAND Jumper Designation Jumper Installed ON Jumper Removed
1 2 3 4 5 6

MAIN 1 OF F WIT H DE MAND MAIN 1 ON WIT H DE MAND JP1 Local Sensing Remote Sensing
C E NT IG R ADE DIS P LAY FAHR E NHE IT DIS P LAY JP4 2 Pipe System* 4 Pipe System
OP E R AT ING P OS IT ION N/A

Application Notes
OP E R AT ING P OS IT ION N/A
85 F / 60 F S E T B AC K 90 F / 50 F S E T B AC K

1. When no pipe sensor is used the main output controls

cooling and the secondary output controls heating.
2. The pipe sensor should be mounted on the main coil
Example: This dip switch is configured for on with demand, °F
input for water system operation and in the main duct
Display, ON-OFF Operation And 90/50°F Setback. system for forced air operation.
NOTE: Thermostat power must be cycled for changes in dip 3. The set point and operating mode will be retained on a
switch configuration to take effect. loss of power.
4. When using either a remote probe or pipe sensor, run
wiring away from any electrical motors or power wiring.

Power-Up Operating Sequence

Upon application of power, an MTA158 will go directly to
normal operation.

IM 1015 (10/13) ©2013 Daikin Applied | (800) 432–1342 | www.DaikinApplied.com

IM 1152-10 67
 Addendum Material

IM 1152-10 • HORIZONTAL FAN COILS 68 www.DaikinApplied.com

 Addendum IM 1016 — MT158 B

Installation and Maintenance Manual IM 1016-2

Group: Applied Air Systems
Part Number: IM1016-2
Date: July 2018

MTB 158 Microprocessor Thermostat

ON/OFF and 3-Wire Controller

DANGER Installation
READ THESE INSTRUCTIONS CAREFULLY BEFORE 1. Install the thermostat with the two furnished mounting
ATTEMPTING TO INSTALL, OPERATE OR SERVICE screws to a standard 4-11/16" × 2-1/8" square device
THIS THERMOSTAT. box with a 2" × 4" adapter ring.
Failure to observe safety information and comply with 2. For wall installations, mount the thermostat on an
instructions could result in PERSONAL INJURY, DEATH inside wall approximately 5 feet above the floor. The
AND/ OR PROPERTY DAMAGE. location should provide circulation at average room
To avoid electrical shock or damage to equipment, temperature. Avoid direct sunlight or sources of hot or
disconnect power before installing or servicing. Use only cold air in the room or wall.
wiring with insulation rated for full thermostat operating 3. Remove the cover. Mount thermostat base assembly
voltage. Use copper wire only. Insulate or wirenut all un- to the outlet box using the screws provided, tighten
used leads. Any wiring, including the remote probe,may the screws evenly but do not over tighten. Connect
carry the full operating voltage of the thermostat. wires as shown in the appropriate wiring diagram for
To avoid potential fire and/ or explosion do not use in your thermostat style.
potentially flammable or explosive atmospheres. 4. To use a remote sensor on units with local sensing
Retain these instructions for future reference. You must capability, remove jumper JP-1 to disable local
review your application and national and local codes to sensing. Failure to remove JP-1 will cause improper
ensure that your installation will be functional and safe. operation of the thermostat.
5. Remove the LCD plastic protective film. Reinstall
CAUTION the cover assembly. Install the cover locking screw
Care should be used to avoid electrostatic discharge to provided in the hole at the left side of the control
the microprocessor. enclosure to complete the installation.
This unit has configuration jumpers. You may need to 6. Checkout: After wiring and installation are complete,
reconfigure this thermostat for your application. energize the system and check the operation. Adjust
the thermostat as necessary to complete at least one
cycle. Be sure the thermostat and all other equipment
are functioning correctly.

IM 1152-10 69
Addendum IM 1016 — MT158 B

Figure 1: Wiring Diagram for 3-Wire Valve Configuration Table 1: Ratings

Fan and system switches
C ONNE C T IONS

Thermostatic
LINE V OLTAG E

L1 (HOT) Voltage
1 Rating Inductive Resistive Switching
Amps Pilot Duty (Pilot Duty)
LO FLA LRA
2 24 VAC N.A. N.A. N.A. 24 VA 10 VA
MED L2 OR NEUTRAL
3 FAN 120 VAC 5.8 34.8 6.0 125 VA NA
HIGH 240 VAC 2.9 17.4 5.0 125 VA NA
4 277 VAC 2.4 14.4 4.2 125 VA NA
OR SINGLE SPEED FAN

24 VAC 1
5 24 VAC
6
24 VAC 2 XFMR Thermostat Operation
SETBACK INPUT These thermostats are designed to control ON-OFF, N.O.
7
and N.C. valves, relays and three-wire floating valves. These
MAIN 1 OPEN
10 MAIN units may include a fan switch with one or more fan speed
SEC 1 OPEN selections.
11
C ONNE C T IONS
LOW V OLTAG E

MAIN 2 CLOSE
12 Table 2: Main and Secondary Output Operation*
SEC 2 CLOSE SECONDARY
13 3-Wire OFF ON
Output Floating with Demand with Demand
OUTSIDE AIR
14 DAMPER OUTPUT Main 1 Powers main ON at temp ON at temp
(Terminal 10) valve open demand demand
15 REMOTE PROBE Main 2 Powers main Cycles ON with Cycles ON with
(Terminal 12) valve closed demand demand
16 PIPE SENSOR
Summer: OFF Summer: ON with
Secondary Powers secondary with heat demand heat demand
17 (Terminal 11) valve open
Winter: Disabled Winter: Disabled

Secondary 2 Powers secondary ON at second ON at second

(Terminal 13) valve closed stage heating stage heating
demand demand
Figure 2: Wiring Diagram for ON/OFF Ouput Configuration Note: * Operation determined by configuration. See Dip Switch Configuration
Table.
C ONNE C T IONS
LINE V OLTAG E

L1 (HOT)
1
LO
Mode Button Operation
2
OFF: All thermostat outputs are off, fan is still operational if
MED L2 OR NEUTRAL
3 FAN connected to manual fan speed switch.
HIGH
4 AUTO: The thermostat automatically selects heating or cooling
OR SINGLE SPEED FAN
mode depending on the set point and room temperature. The
5
24 VAC 1 appropriate HEAT or COOL indicator is enabled in addition to
24 VAC
24 VAC 2 XFMR
AUTO. A 3°F dead-band is provided to prevent short cycling
6 between heating and cooling modes.
SETBACK INPUT
7 After change-over the control points automatically shift so that
MAIN 1 MAIN 1 the heating OFF-point or the cooling OFF-point equals the set
10 OUTPUT
SEC 1
point temperature.
SECONDARY
11 1 OUTPUT COOL: The thermostat operates as a cooling-only thermostat.
C ONNE C T IONS
LOW V OLTAG E

FAN DEMAND
12 OUTPUT
The heating outputs are disabled.
HEAT 2 2ND STAGE
13 HEAT: The thermostat operates as a heating-only thermostat.
HEAT
OUTSIDE AIR The cooling outputs are disabled.
14 DAMPER OUTPUT
If constructed without a mode button, the thermostat operates
15 REMOTE PROBE in Auto mode, subject to configuration of the 2/4 pipe jumper
16 PIPE SENSOR and pipe sensor input.
17

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 Addendum IM 1016 — MT158 B

Fan Speed Switch Operation Service Menu

Fan speed is determined by manual selection from fan switch Access: Press UP▲ and DOWN▼ arrows for 5 seconds.
OFF to HIGH, MEDIUM and/ or LOW. In units with the Cycling
Menu Selection: Select 1 to 5 by pressing the mode button or
Fan Option (demand output), the Fan operation (CYCLING vs.
by pressing the UP▲ and DOWN▼ arrows simultaneously.
CONTINUOUS) is determined by application connections. In
OFF position all outputs are off and display blank. Adjust Value: Use UP▲ or DOWN▼ arrow.

Up/ Down Arrow Operation Table 3: Service Menu Functions

A first touch of either arrow will display the set point (a single Item # Function Range Default
set point is employed for both heating and cooling). Continued 1 Zone Temp Offset -5.1°F to 5.1°F 0°F
pressure on either arrow will scroll the set point to new values. 2 Valve Stroke Time 30 sec. to 5 min. 120 sec.
After three seconds with no pressure on either arrow, the 3 Fan Delay to OFF 0 to 10 min. 0 sec.
selected set point becomes effective and the display of the Compressor
4 Minimum OFF 30 sec. to 10 min. 120 Sec.
room temperature resumes. Time
0 = Time Based
Setback Operation 5 Purge Cycle 1 = Temperature 1
Based
Connection of the Setback Input to 24 VAC 1 will force the
control into unoccupied mode (see wiring diagram). Pressing Figure 3: Circuit Board Jumpers
an arrow key or the mode button on the thermostat cover will
ON
disable the setback input for one hour.

1
DIP S WIT C H

2 3 4 5 6
Pipe Sensor Operation
If cold water is detected, the system will operate in summer
AUTO J P4
mode and the Main output will be cooling. If hot water is
10 11 12 13 15 16 17
detected, the system will operate in winter mode, the Main
output will be heating and First Stage Secondary Output will be
5 6 7 1 2 3 4

disabled. In the case of an ambiguous reading, neither hot nor

cold, the thermostat will initiate a purge cycle.

Three Wire Floating Valve Operation

J P1
Open and Close outputs are used to position the valve.
Stroke time is factory set at two minutes. Outputs are off after
reaching full on or off position. Valves are periodically reset for Figure 4: Dip Switch Configuration
accuracy.
ON
Secondary 1 OFF with Demand Secondary 1 ON with Demand
1 2 3 4 5 6

Outside Air Damper Operation Main 1 OFF with Demand Main 1 ON with Demand

This output is ON any time the control is turned ON. Centigrade Display Fahrenheit Display

Secondary 3 ON – OFF Secondary 3-Wire Floating

Application Notes Main 3 ON – OFF Main 3-Wire Floating

85°F/60°F Setback 90°F/50°F Setback

1. When no pipe sensor is used the main output controls
cooling and the secondary output controls heating.
2. The pipe sensor should be mounted on the main coil Example: This dip switch is configured for ON with demand, ºF
input for water system operation and in the main duct display. ON-OFF operation and 90ºF/50ºF setback.
system for forced air operation. NOTE: Thermostat power must be cycled for changes in the
dip switch configuration to take effect.
3. The set point and operating mode will be retained on a
loss of power.
Table 4: Circuit Board Jumper Configuration
4. When using either a remote probe or pipe sensor, run
wiring away from any electrical motors or power wiring. Jumper Designation Jumper Installed ON Jumper Removed
JP1 Local Sensing Remote Sensing
JP4 2 Pipe System* 4 Pipe System

Power-Up Operating Sequence

Upon application of power, an MTA158 will go directly to
normal operation.

IM 1016-2 (07/18) ©2018 Daikin Applied | (800) 432–1342 | www.DaikinApplied.com

IM 1152-10 71
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 Addendum IM 1017 — MT168

Installation and Maintenance Manual IM 1017-1

Group: Applied Air Systems
Part Number: 910102992
Date: January 2017

MT 168 0-10 VDC/4-20mA Thermostat

Installation
DANGER 1. Install the thermostat with the two furnished mounting
screws to a standard 4-1/16" × 2-1/8" square device
READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING box with a 2" × 4" adapter ring.
TO INSTALL, OPERATE OR SERVICE THIS THERMOSTAT.
2. For wall installations, mount the thermostat on an
Failure to observe safety information and comply with instructions inside wall approximately 5 feet above the floor. The
could result in PERSONAL INJURY, DEATH AND/ OR PROPERTY location should provide circulation at average room
DAMAGE. temperature. Avoid direct sunlight or sources of hot or
To avoid electrical shock or damage to equipment, disconnect power cold air in the room or wall.
before installing or servicing. Use only wiring with insulation rated for 3. Remove the cover. Mount thermostat base assembly
full thermostat operating voltage. Use copper wire only. Insulate or to the outlet box using screws provided. Tighten the
wire-nut all un-used leads. Any wiring, including the remote probe, may screws evenly but do not overtighten. Connect wires
carry the full operating voltage of the thermostat. per wiring diagram.
To avoid potential fire and/ or explosion do not use in potentially 4. To use a remote sensor on units with local sensing
flammable or explosive atmospheres. capability, remove jumper JP-1 to disable local
Retain these instructions for future reference. You must review your sensing. Failure to remove JP-1 will cause improper
application and national and local codes to ensure that your installation operation of thermostat.
will be functional and safe. 5. Connecting a jumper between terminals 16 and 17
will disable the secondary output and change the
CAUTION main output to heat mode.
Care should be used to avoid electrostatic discharge to the 6. Connection of a 24 VAC set-back signal will force
microprocessor. the control into unoccupied mode (see diagram).
This unit has configuration dip switches and jumpers. You may need to Pressing an arrow key or the mode buttons on the
reconfigure the thermostat for your application. thermostat cover will disable the setback input for
one hour.
7. Remove the LCD plastic protective film to complete
the installation. Reinstall the cover assembly. Install
cover locking screw provided.
8. Checkout: After wiring and installation are complete,
energize the system and check the operation. Adjust
the thermostat as necessary to complete at least one
cycle. Be sure the thermostat and all other equipment
are functioning correctly.

IM 1152-10 73
Addendum IM 1017 — MT168

Figure 1: Mounting Application Notes

1. When no changeover pipe sensor is used, the main
output controls cooling and the secondary output controls
heating.
2. The fan output, terminal 12, is energized whenever there
is a demand for heating or cooling. This output can be
connected to a relay that can be used to provide fan
cycling to terminal 1.
3. The changeover pipe sensor should be mounted on the
main coil input for water system operation and in the
main duct system for forced air operation.

Figure 2: Typical Wiring* 4. The set point and operating mode will be retained on a
loss of power.
C O N N E C T IO N S

5. When using either a remote probe or pipe sensor, run

L IN E V O LTA G E

L1 (HOT)
1
wiring away from any electrical motors or power wiring.
LO FAN
2 6. The auxiliary heat output supplies a 24 VAC signal with
MED FAN L2 OR NEUTRAL
3 FAN call for heat. This output is shipped configured for staged
HIGH FAN heat.
4 OR SINGLE SPEED
7. The thermostat is shipped with all dip switches in the
24 VAC 1 “ON” (closed) position.
5 24 VAC
24 VAC 2 XFMR 8. The damper output is ON when mode is AUTO, HEAT or
6
COOL. Damper is OFF in set back.
SETBACK
7
MAIN 1
10
SECONDARY
0-10 VDC
OUTPUT Thermostat Operation
11 0-10 VDC
1 OUTPUT These thermostats are designed to control 0-10 VDC/4-0 mA
C O N N E C T IO N S
L O W V O LTA G E

FAN
12 OUTPUT valves. These units may include a fan switch with one or more
AUXILIARY fan speed selections.
13 HEAT
OUTPUT
DAMPER
14 OUTPUT Mode Button Operation
15 OPTIONAL REMOTE PROBE OFF: All thermostat outputs are off, fan is still operational if
16 connected to a manual fan switch.
AUTO: The thermostat automatically selects heating or cooling
17 OPTIONAL PIPE SENSOR
mode depending upon the relationship of the setpoint and the
room temperature. The appropriate HEAT or COOL indicator
is enabled in addition to AUTO. A 3°F dead band is provided
NOTE: Note: * Specific models may have fewer connections.
to prevent short cycling between heating and cooling modes.
After changeover, the control points automatically shift so that
Electrical Ratings the heating OFF-point equals the set point temperature or the
cooling OFF-point equals the set point temperature.
Table 1: Fan switch (terminals 1-4) line voltage
COOL: The thermostat operates as a cooling only thermostat.
connections
The heating outputs are disabled.
Voltage Inductive Resistive Pilot Thermostatic HEAT: The thermostat operates as a heating-only thermostat.
Rating FLA LRA Amps Duty Switching
The cooling outputs are disabled.
24 VAC N.A. N.A. N.A. 24 VA 10 VA
120 VAC 5.8 34.8 6.0 125 VA NA
240 VAC 2.9 17.4 5.0 125 VA NA
277 VAC 2.4 14.4 4.2 125 VA NA

IM 1017-1 • MT 168 0-10 VDC/4-20mA THERMOSTAT 2 www.DaikinApplied.com

74 IM 1152-10
 Addendum IM 1017 — MT168

Fan Speed Switch Operation Service Menu:

Fan speed is determined by manual selection from fan switch Access: Press UP▲ and DOWN▼ arrows for 5 seconds.
OFF to HIGH, MEDIUM and/or LOW. In the OFF position, all
Menu Selection: Select 1 to 5 by pressing the mode button or
outputs are off and the display is blank.
by pressing the UP▲ and DOWN▼ arrows simultaneously.

Up/Down Arrow Operation Adjust Value: Use UP▲ or DOWN▼ arrow.

A first touch of either arrow will display the setpoint (a single

Table 4: Service Functions
set point is employed for both heating and cooling). Continued
pressure on either arrow will scroll the setpoint to new values. Item # Function Range Default
After three consecutive seconds on either arrow, the selected 1 Zone Temp Offset -5.1 °F to 5.1 °F °0 F
setpoint becomes effective and the display of the room 2 Valve Stroke Time 30 sec. to 5 min. 120 sec.
temperature resumes. 3 Fan Delay to OFF 2 to 10 min. 120 sec.
Compressor
4 Minimum OFF 30 sec. to 10 min. 120 sec.
Configuration Time
0 = time based
5 Purge Cycle 1
Table 2: Circuit Board Jumper Configuration 1 = temperature
based
Jumper Closed ON* Open OFF
JP1 Local Sensing Remote Sensing
JP2 2 Pipe System 4 Pipe System
JP3 Factory Use Only

JP4 0-10 VOC 4-20 mA

Main Output Main Output

JP5 0-10 VOC 4-20 mA

Secondary Output Secondary Output

Table 3: Dip Switch Configuration

Switch Closed ON* Open OFF
1 Not Use Not Used

2 Staged Heat 3°F Diff. Aux. Heat No Diff. (Term.

(Term. 13) 13)
3 °F Display °C Display
Main & Sec. Outputs Main & Sec. Outputs
4 0-10 VOC (Term. 10 & 4-20 mA (Term. 10 & 11)
11) requires JP4 & JP5 Remove JP4 & JP5
5 Operating Position Not Used
6 Setback= 90°F & 50°F Setback = 85°F & 60°F
Note: * On is with the dip switch handle to the right. See diagram.

Figure 3: Circuit Board

IM 1017-1 (01/17) ©2017 Daikin Applied | (800) 432–1342 | www.DaikinApplied.com

IM 1152-10 75
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 Addendum IM 846 — MT170

Installation and Maintenance Manual IM 846

Group: Applied Air Systems
Part Number: 910102993
Date: October 2013

T170 Thermostat
24 VAC/120–277 VAC
3-Speed Fan Control (Continuous or Cycling) or Staged Fan Control

WARNING
BEFORE ATTEMPTING TO INSTALL, OPERATE, OR
SERVICE THIS THERMOSTAT, CAREFULLY READ
THESE INSTRUCTIONS.
Failure to observe safety information and comply with
instructions could result in PERSONAL INJURY, DEATH,
AND/OR PROPERTY DAMAGE.
To avoid potential fire and/or explosion, do not use in
potentially flammable or explosive atmospheres.
Retain these instructions for future reference. This
product, when installed, is part of an engineered system
whose specifications and performance characteristics are
not designed or controlled by Daikin. You must review
your application and national and local codes to assure
that your installation is functional and safe.

US
DANGER
Hazardous voltage. To avoid electrical shock or damage
to equipment, disconnect power before installing or
servicing.
Failure to follow these instructions will result in death or
serious injury.
IM 846 T 170 Thermostat

IM 1152-10 77
Addendum IM 846 — MT170

Installation
Thermostat Model and Part Number The thermostat base mounts to a field provided 4" × 4" outlet
box with a 2" × 4" mud ring (Figure 1). The thermostat cover
Daikin offers two different thermostats depending on the fan assembly mounts to the thermostat base.
speed control used (Table 1).
1. Disconnect power before installing or servicing.
Table 1: Thermostat model and part numbers 2. Run line voltage wiring (and low voltage wiring if
applicable) into the field provided outlet box and mud
Model Number Part Number Fan Speed Control ring (Figure 1).
TA170-001 107345335 3-Speed Fan Control
TB170-001 107345336 Staged Fan 3. Locate all connections within the mud ring/connection
Note – For a list of thermostat features, refer to ED 3611. box and wire nut all unused wires.
4. Remove the thermostat cover assembly from its base to
Optional Occupancy Detection Sensors/ gain access to the circuit board (Figure 2).
Kits 5. On the circuit board, set the voltage selection switch
In addition to the T170 thermostat, Daikin offers optional (Figure 2) to the appropriate voltage for the application
occupancy detection sensors that can be ordered and used
• 24 V = 24 VAC
in conjunction with the thermostat. When ordering, use the
associated kit number(s) • 110–277 V = 120, 240, or 277 VAC.
NOTE: The circuit board is shipped with the voltage selection
switch in the 110-227 V position. For 24 VAC use, the
Table 2: Occupancy sensor model and kit numbers
switch must be in the 24 V position.
Model Number Kit Number
6. The circuit board is also equipped with configuration
SA200-001 6677877211
jumpers (JP1, JP3, and JP4 in Figure 2). Depending on
SB200-001 6677877311
the application, it may be necessary to reconfigure the
SD200-001 6677877411
following jumpers:
SB200-002 6677877511
• JP4: 2/4 Pipe Sensor Jumper - This jumper selects
between 2-pipe (jumper ON) and 4-pipe (jumper OFF)
Mounting and Wiring the Thermostat operation (Fan Operation).
• JP3: Door/Window Switch Jumper - This jumper is
CAUTION shipped normally open. Placement of a jumper allows
Before applying power, the voltage selection switch must be in for occupancy detection and door/window switch only
the appropriate position. Failure to select the correct voltage operation (Optional Occupancy Detection Equipment
can cause thermostat malfunction or permanently damage Operation).
the thermostat. • JP1: Removal of this jumper allows the sensor to be
located in a remote location.
CAUTION 7. Connect the color coded thermostat wires (Figure 3) to
To use a remote sensor on units with local sensing capability, the line voltage wires located in the mud ring/connection
remove jumper JP1 to disable local sensing. Failure to remove box and secure the connections with wire nuts.
JP1 can cause improper operation of the thermostat with a 8. Install the thermostat base to the mud ring/outlet box
remote probe installed. using two furnished mounting screws. Tighten the screws
evenly but do not over tighten.
CAUTION
NOTE: An output ratings chart (Table 3) is located on the
Use copper wire only. Insulate or wire nut all unused leads. inside of the base.
Avoid electrostatic discharge to the thermostat. Failure to do
9. With the base now secured, verify that the circuit board is
so can cause thermostat malfunction or permanently damage
firmly snapped into the cover and is not dislodged.
the thermostat.
10. Install the cover assembly to the base, pressing firmly to
DANGER engage the cover locking snaps.
Hazardous voltage. Combined load current is not to exceed
20 amps. Mount only to a grounded metallic box. Low voltage
wiring is Class 2. To avoid electrical shock or damage to
equipment, disconnect power before installing or servicing.
Failure to follow these instructions will result in death or
serious injury.

IM 846 • T 170 THERMOSTAT 2 www.DaikinApplied.com

78 IM 1152-10
 Addendum IM 846 — MT170

Figure 1: Mounting the thermostat Table 3: Output ratings

4 × 4 outlet box Inductive
Voltage Resistive Pilot Duty HP
FLA LRA Amps
CAUTION 24 VAC NA NA NA 24 VA NA
To avoid damaging the unit, 120 VAC 5.8 34.8 6.0 125 VA 1/4
make all wiring connections
240 VAC 2.9 17.4 5.0 125 VA 1/4
inside the box.
277 VAC 2.4 14.4 4.2 125 VA 1/4

2 × 4 mud ring Operation

Thermostat Button Operation
Cover locking snaps The thermostat interface (Figure 4) contains buttons for
(both sides) use in navigating to accompanying menus/screens and for
performing specific operations. These buttons and operations
Base
are described below.
Cover assembly
Figure 4: Thermostat interface (model #TA170-001
Figure 2: Circuit board shown)

MODES:
AUTO
UP/DOWN
COOL ARROW
JP4 HEAT BUTTONS
OFF

JP3

JP1

SYSTEM FAN SPEED

BUTTON BUTTON BUTTON
or
F/C
Voltage Selection Switch BUTTON
(part #107345336)

Figure 3: Wiring diagram

Wiring diagram
Setback Input/ door Switch
System Button Operation
White/black

White/Yellow
Remote Probe The System button (Figure 4) contains and displays the
LOW VOLTAGE

Accessories
following modes of operation:
THERMOSTAT CONNECTIONS

White/Violet
Circuit Common Available
from
Pipe Sensor SUNNE CONTROLS
OFF—All thermostat outputs are off. The fan is still operational
White/Blue
if FAN ON is selected.
Occupancy Detector
White/Gray
AUTO—The thermostat automatically selects heating
Yellow L2 / NEUTRAL or cooling mode depending on the set point and room
Blue
Cool temperature. If demand exists, the appropriate HEAT or COOL
(Main Output)
Heat
icon illuminates. A 3°F dead band is provided to prevent short
Red (Secondary Output)
cycling between heating and cooling modes. After changeover,
LINE VOLTAGE

White/Brown Fan Low the control point automatically shifts so that the control OFF
OUTPUTS
White/Red Fan Medium
See Ratings point equals the set point temperature.

White/Orange Fan High COOL—The thermostat operates as a cooling only thermostat.

Brown Outside Air HEAT—The thermostat operates as a heating only thermostat.

Black L1

www.DaikinApplied.com 3 IM 846 • T 170 THERMOSTAT

IM 1152-10 79
Addendum IM 846 — MT170

Up/Down Arrow Button Operation Thermostat Menu Functions

4. Use the Up▲ and Down▼ arrow buttons (Figure 4) to The thermostat menu contains nine functions which can be
increase or decrease the temperature. accessed using controls on the thermostat. Accessing the
menu functions and details of each function are described
Fan Button Operation below.
Use the Fan button (Figure 4) to control operation of the fan. Menu Function Access
In the ON position, the fan output operates continuously. In
the AUTO position, the output cycles with demand. In the OFF 1. Press and hold the UP and DOWN arrow buttons (Figure
position, all outputs are off. 5) for five seconds.
NOTE: Model #TB170-001 (part #107345336) has staged fan 2. The current display clears and the number “1” appears.
control.
3. 3 Press the SYSTEM button to scroll to the next item
number.
Speed Button Operation (TA170-001)
4. Use the UP and DOWN buttons to make changes within
The fan Speed button (Figure 4) for model #TA170-001 (part the selected number.
#107345335) is determined by manually selecting HI, MED, or
LO. Press and hold the Speed button for five seconds to toggle
Figure 5: Thermostat menu
the displayed temperature from Fahrenheit to Celsius.
HOLD BOTH STEP

F/C Button Operation (TB170-001) FOR

5 SECONDS
THROUGH
SELECTIONS
1 F/C Display Selection
2 Continuous Set Point Display
Model #TB170-001 (part #107345336) is configured for 3 Fan Off Delay
staged fan control and therefore utilizes a F/C button (Figure 4 Range Limit Lo
4) instead of a Speed button. When pressed, the F/C button 5 Range Limit High
toggles between Fahrenheit and Celsius. AND 6 Setback Heat
SYSTEM 7 Setback Cool
Verifying Thermostat Operation TEMPERATURE
8 Zone Temperature Offset
ADJUSTMENT 9 Key Pad Lockout
To verify thermostat operation after mounting and wiring it,
perform the following:
1. Energize the system. 1. F/C (Fahrenheit/Celsius) display selection: When this
2. Set the fan to ON. function is selected, the F and C icons appear and the
selected icon flashes. To toggle between F or C, press
3. Select each fan speed, if available, to verify operation.
the up or down arrow button.
4. Set the system button to AUTO or other available selection.
2. Continuous set point display: When this function is
5. Using the UP▲ arrow, adjust the temperature to more selected, the F or C icon, current digits, and the set
than 5°F above ambient temperature to cycle on heating. point icon appear. If the Continuous set point display is
6. Using the DOWN▼ arrow, adjust the temperature to more enabled, the set point icon flashes. To toggle between
than 5°F below ambient temperature to cycle on cooling. continuous display of set point and display of zone
temperature, press the up or down arrow button.
3. FAN OFF delay: When this function is selected, the
FAN, OFF, and digits appear. The digits represent the
number of seconds the fan stays on after the heating and
cooling outputs are turned off. To increase or decrease
the value from 0–255 seconds, press the up or down
arrow button.
4. Range limit low: When this function is selected, the
current minimum range setting, the SET POINT icon and
the LO icon appear. To increase or decrease the value,
press the up or down arrow button.
5. Range limit high: When this function is selected,
the current maximum temperature range adjustment,
SET POINT icon, and LO icon appear. To increase or
decrease the value, press the up or down arrow button.

IM 846 • T 170 THERMOSTAT 4 www.DaikinApplied.com

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 Addendum IM 846 — MT170

6. Set back heat: When this function is selected, the Fan Operation
current temperature range adjustment, the SET BACK
icon, and the HEAT icon appear. To increase or decrease The thermostat may be factory configured for standard or
the value, press the up or down arrow button. staged fan operation.

7. Set back cool: When this function is selected, the Standard Fan Configuration (TA170-001)
current Cool setback value, the SET BACK icon, and the
COOL icon appear. To increase or decrease the value, Units with standard fan operation (Figure 7) have a selectable
press the up or down arrow button. fan Speed button.

8. Zone temperature offset: When this function is

Figure 7: Standard fan operation
selected, the numeric ones and tenths (0.0) appear with
a leading minus sign. To increase or decrease the value STANDARD FAN OPERATION
+/– 9°F, press the up or down arrow button. Increments FAN ON: Fan is on continuously.

are made in 1°F and 0.5°C. FAN AUTO: Fan cycles on with demand.

SPEED: Fan speed is

9. Keypad lockout: When this function is selected, the ON selected by the user. TEMPERATURE DEMAND - COOL

and OFF icons appear. The enabled icon flashes. OFF

is the default. ON disables the keypad except for entry -4 F -3 F -2 F -1 F 1F 2F 3F 4F

Set Point
into the service menu. To increase or decrease the value, TEMPERATURE DEMAND - HEAT

press the up or down arrow button.

FAN AUTO: Fan cycles on with demand.
NOTE: In the event of a power failure, these values are FAN ON: Fan is on continuously.
stored and can be recalled.

Staged Fan Configuration (TB170-001)

Condensate Overflow Interrupt
Factory configuration is available for staged fan operation
The remote probe input can be used with a condensate (Figure 8) to provide occupant comfort while using the most
overflow switch (CO), either in conjunction with a remote probe effective fan speed.
(normally closed CO switch, Figure 6), or with local sensing
(normally open CO switch, Figure 6). When the condensate
Figure 8: Staged fan operation
switch activates, the thermostat displays a service wrench icon
and disables all outputs. STAGED FAN OPERATION
FAN HIGH
Figure 6: Local and remote probe installation FAN MEDIUM
FAN ON: Fan stays at lowest speed.
FAN LOW
Local Sensor Installation TEMPERATURE DEMAND - COOL
Control System
OFF ON

Remote Probe -5 F -4 F -3 F -2F -1 F

System
SET
POINT
1F 2F 3F 4F 5F
White/Yellow
ON

TEMPERATURE DEMAND - HEAT

FAN LOW
FAN ON: Fan stays at lowest speed.
Normally Open FAN MEDIUM
Circuit Common Condensate Switch
White/Violet FAN HIGH

Remote Probe Installation Controlled Off Factory Configuration

A factory configuration may be provided for minimum heating
Remote Probe and cooling requirements. Using this configuration, the HEAT
White/Yellow and COOL outputs are automatically cycled on at the heat
Normally Closed setback limit. Your thermostat may not have this feature.
Circuit Common Condensate Switch
White/Violet

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Fan Coil Operation 5. After the three minute purge cycle occurs, the thermostat
checks to see if the water temperature is more than 15°F
Fan Coil operation is either a 2-pipe or 4-pipe configuration from the set point, or above 80°F, or below 60°F.
which is determined by jumper selection JP4 (Mounting and
Wiring the Thermostat). If yes, normal HVAC operation occurs.
If no, the valve is left open and the thermostat continues
2-Pipe Operation to search for a valid reading.
In this configuration, the thermostat permanently disables NOTE: If at any time the demand goes away, the thermostat
the secondary output and disables the fan from cycling in an will stop the purge cycle.
invalid mode. The main output configuration is dependent
on the pipe sensor input. With a pipe sensor connected, the Table 4 shows output operation, depending on the sensed
thermostat automatically selects heating or cooling depending water temperature.
on the sensed water temperature. If the pipe sensor input is
open (unconnected), the main output only cools. If the pipe Table 4: Output operation
sensor input is shorted, the main output only heats. Normal
Output Operation
thermostat default is for 4-pipe operation. For 2-pipe operation, 2-Pipe/4-Pipe Water
Selection Temperature Secondary
install a jumper on JP4. Main Output Output
Cooling only
4-Pipe Operation Cold The fan does not Disabled
cycle ON with a
In this configuration, both the main output (COOL) and the 2-pipe heat demand.
secondary output (HEAT) are available. These both cycle ON JP4 ON Heating only
depending on the mode of the thermostat. With a pipe sensor Hot The fan does not Disabled
connected, the thermostat automatically changes the main cycle ON with a
cool demand.
output to heat and disables the secondary output if the main coil Cold Cooling Heating
water is hot. For 4-pipe operation, the JP4 jumper is removed. Heating only
4-pipe
JP4 OFF Hot The fan does not Disabled
Pipe Sensor Operation cycle ON with a
cool demand.
A pipe sensor can be connected when the thermostat is
configured for either 2-pipe or 4-pipe configuration. The pipe
sensor is used to determine the water temperature in the main
Setback Operation
coil, which should be connected to the primary output. In this configuration, the low level switch input normally is
open. To enable setback operation, the JP3 jumper is removed
Pipe sensor input—use a 10K Remote Probe or a standard
(Mounting and Wiring the Thermostat). The input will close and
ON-OFF Aquastat for summer/winter changeover.
the thermostat heating and cooling setback limits can then be
used as temperature control points. Fan operation in setback
Purge Cycle
is cycled with demand. Press any thermostat key to override
With a pipe sensor connected, the thermostat initiates a setback for one hour. Setback overrides any user setting except
purge cycle if the sensed water temperature is ambiguous if the control is turned to OFF.
(not adequately hot or cold). The sequence for purge cycle
operation is as follows:
1. The thermostat has a call for heat or cooling.
NOTE: If at any time the call goes away, the thermostat stops
the purge cycle.
2. The thermostat checks the pipe sensor to verify water
temperature.
3. If the water temperature is beyond 15°F of the set point,
normal HVAC control occurs.
4. If the water temperature is not beyond 15°F of the
set point, the thermostat checks to see if the water
temperature is above 80°F or below 60°F.
If yes, normal HVAC control occurs.
If no, the thermostat opens the main output (COOL) for
three minutes.

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Optional Occupancy Detection Equipment Operation

The T170 thermostat can be used with optional S200 series Operation
occupancy detection equipment. Purchasing and installing
this equipment to compliment the thermostat adds energy In an occupied mode, the thermostat operates normally
savings by setting back HVAC operation during occupied and and looks for a door open signal. When the door opens, the
unoccupied times. Optional detection equipment configurations thermostat waits for a door close signal. If the door is open for
and operation are described below. more than two minutes, the thermostat turns the HVAC system
outputs to OFF. During this two minute period, if any button
is pressed on the keypad, the time delay is extended to ten
SB200-001 Occupancy Sensor minutes. The time delay can only be extended once. Once the
The SB200-001 occupancy sensor (Figure 9) serves as an HVAC outputs transition to OFF, a door closure is required to
occupancy sensor for automatic control of a guest room HVAC re-enable the outputs. When the door closes, the thermostat
system. It incorporates an innovative dual delay processor starts a two minute timer and tries to detect occupancy. If the
which allows the sensor to verify the nature of occupancies, timer expires and no occupancy is detected, the thermostat
and is capable of eliminating unnecessary actuations of the transitions to an unoccupied state. If occupancy is detected
HVAC device due to unintentional passages or short time while the timer is running, the thermostat will remain in the
occupancies. The sensor may also serve as a slave sensor occupied mode.
(Figure 11). In an unoccupied mode, the thermostat sets heating and cooling
The sensor switch is open in occupied mode and closed in set points to setback values as determined by factory or user
unoccupied mode. An optional door and/or window switch settings. The fan is automatically set to cycle with demand. The
(Figure 9) is open when the door/window is open and is closed thermostat continually monitors the occupancy sensor and will
when the door/window is closed. enter into occupied mode if occupancy is detected.
NOTE: To use this configuration, a jumper must be installed If the installation is only using a door/window switch, the
to JP3 to allow occupancy input. thermostat will disable the HVAC outputs if this output is open
An optional door and/or window switch (Figure 9) can for longer than two minutes.
be added for use with the SB200-001 sensor. To enable door/window switch only operation, install a jumper to
JP3 (Mounting and Wiring the Thermostat) and the occupancy
input must be shorted to circuit common.

Figure 9: Optional equipment configuration #1

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SD200-001 Occupancy Sensor

The SD200-001 occupancy sensor (Figure 10) serves as a Operation
master sensor for a guest room HVAC management system.
The sensor provides HVAC operation according to occupancy In an occupied mode, the SD200-001 occupancy sensor
status, as well as door/window switch monitoring, selectable (Figure 10) and door switch use advanced microprocessor
high/low temperature setback, form-C output, slave sensor logic to determine occupancy. A door open signal will initiate
connectivity, and a five minute door open HVAC shut-off. occupancy status detection. If the sensor determines that a
room is occupied, it will allow normal HVAC control. The sensor
NOTE: To use this configuration, the jumper to JP3 is will wait for another door open signal before determining
removed to allow setback input. occupancy again.
An optional door and/or window switch (Figure 10)
In an unoccupied mode, the sensor continually monitors
and slave sensor can be added for use with the
SD200-001 sensor. the room. Any occupancy detection will set the operation to
occupied mode.

Figure 10: Optional equipment configuration #2

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SD200-002 Occupancy Sensor

The SD200-002 occupancy sensor serves as a stand alone Operation
master sensor for a guest room HVAC management system.
The sensor provides HVAC operation according to occupancy With each occupancy detection, an OFF delay is started and
status, as well as selectable high/low temperature setback, can be set to delay for up to 30 minutes.
form-C output, and a five minute door open HVAC shut-off.
This system provides basic room setback and is ideal for
control of HVAC in commercial spaces.
NOTE: To use this configuration, the jumper to JP3 is
removed to allow setback input.

Figure 11: Optional equipment configuration #3

IM 846 (10/13) ©2013 Daikin Applied | (800) 432–1342 | www.DaikinApplied.com

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 Addendum IM 1019 — MT180

Installation and Maintenance Manual IM 1019

Group: Fan Coil
Part Number: IM 1019
Date: October 2011

MT 180 Programmable Thermostat

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Table of ConTenTs

Table of ConTenTs

Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . 3 Technical and Application Notes . . . . . . . . . . . . . . . 13

Applications and Features . . . . . . . . . . . . . . . . . . . . . 3 Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Standard Fan Operation . . . . . . . . . . . . . . . . . . . . 13
Thermostat Model and Part Number . . . . . . . . . . . . 4 Staged Fan Operation with
Optional Sensors/Kits . . . . . . . . . . . . . . . . . . . . . . . 4 Temperature Demand . . . . . . . . . . . . . . . . . . . . . . 13

Installing, Mounting and Wiring the Thermostat . . . 5 Fancoil Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Pipe Sensor Operation . . . . . . . . . . . . . . . . . . . . . 14

Front Panel Reference . . . . . . . . . . . . . . . . . . . . . . . . 7 Purge Cycle Operation . . . . . . . . . . . . . . . . . . . . . 14

Display Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Time-Based Purge (Default) . . . . . . . . . . . . . . . . . 14

Saving Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 HVAC Setback Systems . . . . . . . . . . . . . . . . . . . . . . 14

Up/Down Arrow Button Operation . . . . . . . . . . . . . . . 9 Setback Operation - Remove JP3 . . . . . . . . . . . . 14

System Button Operation . . . . . . . . . . . . . . . . . . . . . . 9 Door Switch Only Operation - Install JP3 . . . . . . . 14

Fan Button Operation . . . . . . . . . . . . . . . . . . . . . . . . . 9 Optional Occupancy Detection

Equipment Operation . . . . . . . . . . . . . . . . . . . . . . . . 15
Program Button Operation . . . . . . . . . . . . . . . . . . . . . 9
Occupancy Operation (Install JP3) . . . . . . . . . . . . . 15
Function Overview . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operation from an Occupied Mode . . . . . . . . . . . . 15
Setting the Clock & Day . . . . . . . . . . . . . . . . . . . . 10
Operation from an Unoccupied Mode . . . . . . . . . . 15
Setting the Temperature Display . . . . . . . . . . . . . . 10
SB200-001 Occupancy Sensor . . . . . . . . . . . . . . . 16
Copy Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SD200-001 Occupancy Sensor . . . . . . . . . . . . . . 17
Thermostat Configuration/ Service Menu . . . . . . . . . 10
SD200-002 Occupancy Sensor . . . . . . . . . . . . . . 17
Programming Time & Temperature Settings . . . . . . 10
Annex I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Custom Program . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Annex II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Time & Temperature Programming Example . . . . 11
Overriding the Program . . . . . . . . . . . . . . . . . . . . . 12
System Check-out . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Condensate Overflow Interrupt . . . . . . . . . . . . . . . . 12

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WARNING
Applications and Features
READ THESE INSTRUCTIONS CAREFULLY BEFORE
ATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS For 2 or 4 Pipe Fan Coil and ON/OFF Control
THERMOSTAT. Applications
Failure to observe safety information and comply with • 7 Day, 4 Event Programmability
instructions could result in PERSONAL INJURY, DEATH
AND/OR PROPERTY DAMAGE. • System Selection: OFF-Heat-Cool-Auto-Setback
• 6 Outputs: 1H, 1C, Up to 3 Fan, OA Damper
To avoid electrical shock or damage to equipment, disconnect
power before installing or servicing and use only wiring with • Fan Control: 1-3 Speeds
insulation rated for full thermostat operating voltage. — Cycling (Auto) or Continuous (ON)
Before installing this control, the Voltage Selection Switch — Automatic Fan Speed Staging (TB180 models only)
must be placed in the correct position. See instructions. To
avoid potential fire and/or explosion do not use in potentially
Connections for:
flammable or explosive atmospheres. • Fan Coil Pipe Sensor
Retain these instructions for future reference. This product, • Remote Temperature Probe
when installed, will be part of an engineered system whose • Occupancy Control
specifications and performance characteristics are not • Door Switch or Setback
designed or controlled by PECO. You must review your
• Condensate Overflow
application and national and local codes to assure that your
installation will be functional and safe.

CAUTION
• Use copper wire only, insulate or wire nut all unused
leads.
• Care should be used to avoid electrostatic discharge to
the T180 thermostat.
• This unit has configuration jumpers. You may need to
reconfigure this thermostat for your application

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Specifications Thermostat Model and Part Number

Daikin offers two different 7-Day Programmable Digital
Table 1: MT180 Programmable Thermostat Specifications Heating/Cooling Thermostat with constant fan or Fan cycled,
On/Off Valve Control depending on the fan speed control used
Temperature Set Point Range 50 to 90°F / 10 to 32°C
(See Table 2).
Differential 1°

Memory – Back-Up EEPROM, No batteries required,

Stores settings for unlimited time Table 2: Thermostat Model and Part Number
Installs on standard 4" × 4" device box
Mounting with a 2" × 4" horizontal mud ring Model Number Part Number Fan Speed Control
Physical Dimensions 4.4"(h) × 5.8"(w) × 1.1"(d) TA180-001 910119110 3-speed fan control
Agency Approvals UL, UL Canada TB180-001 910119111 Staged fan control
Electrical Ratings (see Ratings table)

Figure 1: MT180 Programmable Thermostat Dimensions Optional Sensors/Kits

In addition to the T180 thermostat, Daikin offers optional
sensors for occupancy detection (page 14 and page 15) and
10K pipe sensor page 12) that can be ordered and used
in conjunction with the thermostat. Use the associated kit
number(s) provided in Table 3 when ordering.

Table 3: Sensor Model and Kit Numbers

Sensor Model Number Daikin Part Number
SB200-001 6677877311
Occupancy Detection SD200-001 6677877411
Sensor
SD200-002 6677877511
10K Pipe Sensor 107201601

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Installing, Mounting and Wiring the Thermostat

CAUTION Figure 3: Circuit Board
Before applying power, the voltage selection switch must be in
the appropriate position. Failure to select the correct voltage
can cause thermostat malfunction or permanently damage
the thermostat.

CAUTION
To use a remote sensor on units with local sensing capability,
remove jumper JP1 to disable local sensing. Failure to remove
JP1 can cause improper operation of the thermostat with a
remote probe installed.

CAUTION
• Use copper wire only. Insulate or wire nut all unused
leads.
• Avoid electrostatic discharge to the thermostat.
• Failure to do so can cause thermostat malfunction or
permanently damage the thermostat.
The thermostat should be used indoors only. It should be
mounted on an inner wall in a location with freely circulating
DANGER air, and where it will be responsive to changes in room
Hazardous voltage. Combined load current is not to exceed temperature. Avoid mounting near heat generating appliances
20 amps. Mount only to a grounded metallic box. Low voltage (i.e. TV, heater, refrigerator), or in direct sunlight.
wiring is Class 2. To avoid electrical shock or Damage to The thermostat base mounts to a field provided 4” × 4” outlet
equipment, disconnect power before installing or servicing. box with a 2” × 4” horizontal mud ring. The thermostat cover
Failure to follow these instructions will result in death or assembly mounts to the thermostat base.
serious injury
1. Disconnect power before installing or servicing.
Figure 2: Mounting the Thermostat 2. Run line voltage wiring (and low voltage wiring if
applicable) into the field provided outlet box and mud
ring (Figure 2).
3. Locate all connections within the mud ring/connection
box and wire nut all unused wires.
4. Remove the thermostat cover assembly from its base to
gain access to the circuit board (Figure 3).
5. On the circuit board, set the voltage selection switch
(Figure 3) to the appropriate position prior to application
of power.
• 24V = 24 VAC
• 110-277 V = 120, 240 or 277 VAC

NOTE: The circuit board is shipped with the voltage selection

switch in the 110-227 V position. For 24 VAC use, the
switch must be in the 24 V position

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6. The circuit board is also equipped with configuration Figure 4: Wiring Diagram
jumpers (JP1, JP3, and JP4 in Figure 3). Depending on
the application, it may be necessary to reconfigure the
following jumpers:
JP1 Jumper Selection – Remote Temperature Sensor
Local Sensing – Install JP1
Remote Sensing – Remove JP1 – Accessory sensors
are available in standard 60” lengths but can be
extended to meet application requirements.
JP3 Jumper Selection – HVAC Setback Systems
The JP3 jumper allows the T180 to be configured for
Setback, Occupancy Detection or Door Switch Only
Occupancy Operations. For further descriptions of these
conditions please see the Technical and Application
Notes‚ page 12.
• Setback Operation - Remove JP3
• Occupancy Detection - Install JP3
• Door Switch Only - Install JP3
JP4 Jumper Selection – 2 or 4 Pipe Operation
Connection of a pipe sensor will change the operation of
the outputs as shown in Table 4. (See Technical Notes
for further information on Pipe Sensor Operation‚ page Table 4: Jumper Activation
12)
Secondary
Pipe Sensor Main Output
• 2-Pipe Operation - Install JP4 - The thermostat will JP4 Section Water Temp Aqua Stat (Blue Wire) Output (Red
wire)
permanently disable the Secondary Output and
2-Pipe Cold Open Cooling Only Disabled
disables system and fan invalid modes.
JP4-ON Hot Closed Heating Only Disabled
• 4-Pipe Operation - Remove JP4 - Both the Main 2-Pipe Cold Open Cooling Heating
Output (COOL) and Secondary Output (HEAT) will be JP4-OFF Hot Closed Heating Only Disabled
available. NOTE: *Fan will not cycle on for disabled modes.
7. Connect the color coded thermostat wires (Figure 4) to
the line voltage wires located in the mud ring/connection
box and secure the connections with wire nuts. Table 5: Output Ratings
8. Install the thermostat base to the mud ring/outlet box Voltage FLA LRA RES Amps Pilot Duty HP
using two furnished mounting screws. Tighten the screws 24 VAC NA NA NA 24 VA NA
evenly but do not over tighten. 120 VAC 5.8 34.8 6.0 125 VA ¼
240 VAC 2.9 17.4 5.0 125 VA ¼
NOTE: Note: An output ratings chart (Table 5) is located on
the inside of the base. 277 VAC 2.4 14.4 4.2 125 VA ¼
Combined Load Current Not to Exceed 20 Amps
9. With the base now secured, verify that the circuit board is
firmly snapped into the cover and is not dislodged.
10. Install the cover assembly to the base, pressing firmly to
engage the cover locking snaps.

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Front Panel Reference Display Reference

Figure 5: MT180 Programmable Thermostat Interface Figure 6: MT180 Programmable Thermostat Display

The thermostat interface (Figure 5) contains buttons for 1. System Mode Display (See Table 6)
use in navigating to accompanying menus/screens and for
2. Temperature Display (See Table 7)
performing specific operations. These buttons and operations
are described below. 3. Time and Day Display (See Table 8)
1. Liquid Crystal Display with a blue backlight 4. Programming Commands (See Table 9)
2. UP .and DOWN .Buttons 5. Time Period Indicators
3. SYSTEM Button WAKE, DAY, EVE, and SLEEP are the names given to
the four time periods per day. Each time period has its
4. FAN Button
own unique setpoint temperatures as shown in Table 15.
5. PROGRAM Button. 6. Fan Operation Indicators (See Table 10)
7. Program Override Commands (See Table 11)
8. Service Indicator
The wrench symbol is displayed when there is a
temperature sensor error or condensate overflow error.
It indicates there is an open or a short connection to
the sensor switch. When this occurs, the thermostat will
disable all outputs and illuminate the wrench symbol.
A service technician should be called to determine the
cause of the error.

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Table 6: System Mode Display Overview Saving Changes

Menu Description As you navigate your thermostat, be aware of the thermostat’s
HEAT Indicates the system is in heating mode save and exit protocol:
COOL Indicates the system is in cooling mode
Indicates the system will automatically changeover between • The thermostat automatically saves all the changes you
AUTO heating and cooling modes as the room temperature varies make, as you make them.
OFF Turns OFF the entire system
• When you are in the SYSTEM or FAN menus:
Indicates the heating or cooling system is operating in setback
SETBACK mode. Setback mode is an energy saving feature that can — If you push a button that is not applicable to the
be either manually activated by the thermostat’s user, or current menu, all changes are saved and the
automatically activated by an occupancy sensor or door switch
thermostat goes to the menu associated with the
Table 7: Temperature Display Overview button that was pushed.
Menu Description
— If the thermostat is idle for five seconds, the
Default Display Digits display the current room temperature
thermostat times out, saves all changes, and returns
During Programming Digits are used to set the desired temperatures
to the thermostat’s default display.
• When you are in the PROGRAM menu:
Table 8: Time and Day Display Overview — If you push a button that is not applicable to the
Menu Description current menu, nothing happens (your programming is
Digits indicate the current time, and day abbreviations not interrupted).
Default Display
indicate the current day
— If the thermostat is idle for fifteen seconds, the
During Programming Digits and days are used to program time periods
thermostat times out, saves all changes, and returns
Lights up during programming when the clock is being
CLOCK
set to the thermostat’s default display.
24Hr Lights up during programming to indicate time will be
displayed in 24-hour clock format
AM/PM Indicates 12-hour clock format

Table 9: Programming Commands Overview

Menu Description
Enters thermostat into custom program mode which allows you
SET to specify a unique times and temperatures for a particular day or
group of days

COPY Simplifies programming by allowing you to copy all of an individual

day’s settings to another day or group of day
DFLT Restores the thermostat to the factory program

Table 10: Fan Operation Indicators Overview

Menu Description
FAN “FAN” will be always be lit in conjunction with “ON” or “AUTO”
ON Indicates constant, continuous fan operation
AUTO Indicates fan is only on with heating or cooling demand

HI Indicates high speed fan; always lit in conjunction with “ON” or

“AUTO”
Indicates medium speed fan; always lit in conjunction with “ON” or
M “AUTO”

LO Indicates low speed fan; always lit in conjunction with “ON” or

“AUTO”

Table 11: Program Override Commands Overview

Menu Description

HOLD Indicates thermostat is in manual operation. (Programmed

settings are OFF, but not lost)

HOLD HRS During programming, lights up in conjunction with clock digits;

allows program to be put on hold for up to 24 hours
During programming, lights up in conjunction with the clock
HOLD DAYS digits; allows program to be put on hold for up to 99 days
HOLD ON Indicates thermostat is in permanent manual operation
OFF Turns OFF the hold and resumes programmed settings

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Up/Down Arrow Button Operation Fan Button Operation

The ▲ and ▼ buttons function in two ways: Pressing FAN will light up the six fan mode options described
below. Press FAN to scroll through the options. As you scroll,
• When you are in the default display, you can press ▲
the current option will be blinking. To select the blinking option,
to increase, or ▼ to decrease, the current temperature
set-point. This will override programmed temperature wait for the five-second timeout, which saves your option and
settings until the next programmed time period (Wake, returns you to the thermostat’s default display.
Day, Evening, or Sleep).
Table 13: Fan Button Operation Overview
• When you are in the PROGRAM menu, you can press ▲
to scroll up, or ▼ to scroll down, through the menu, time, Menu Description
and temperature options. High speed fan is on continuously, even if no demand for heating
ON HI or cooling exists
Medium speed fan is on continuously, even if no demand for
ON M
System Button Operation heating or cooling exists
Low speed fan is on continuously, even if no demand for heating
ON LO or cooling exists
Pressing SYSTEM will light up the five system mode options
described below. Press SYSTEM to scroll through the options. AUTO HI High speed fan cycles with active demand for heating and
cooling
As you scroll, the current option will be blinking. To select the Medium speed fan cycles with active demand for heating and
AUTO M
blinking option, wait for the five-second timeout, which saves cooling
your option and returns you to the thermostat’s default display. AUTO LO
Low speed fan cycles with active demand for heating and
cooling

Table 12: System Button Operation Overview

Menu Description
Program Button Operation
HEAT The thermostat operates as a Heating Only thermostat
COOL The thermostat operates as a Cooling Only thermostat
Function Overview
The thermostat automatically selects the appropriate Heat or Cool Pressing PROGRAM lights up five program mode options,
AUTO mode depending upon the setpoint (desired temperature) and
zone temperature (actual temperature) described below. Press ▲ or ▼ buttons to scroll through the
OFF Turns the system OFF by disabling all thermostat outputs options. As you scroll, the current option will be blinking. To
Setback mode is an energy saving feature that minimizes the select the blinking option, press PROGRAM again and you will
heating and cooling when the room is not occupied. Setback be taken to the menu associated with that option.
mode overrides the programmed time and temperature settings
by telling the thermostat to instead use the setback setpoint for
heating and cooling. The setback setpoint temperatures are
factory default or installer-selected during installation. During Table 14: Program Button Operation Overview
setback mode, when a demand for heating or cooling exists, the
fan will run at the lowest speed. Menu Description
• Automatic setback mode: If your thermostat is connected CLOCK Sets the current time and day.
SET BACK to an occupancy sensor or door switch, setback mode is
automatically turned on and off by the sensor or door switch. Use this option to change the temperature display to Fahrenheit
°F / °C or Celsius. Your thermostat’s default temperature display setting is
• Manual setback mode: Select SETBACK in the SYSTEM Fahrenheit.
menu. Setback temperature settings will remain in effect until Use to specify the time and temperature programming for a
you manually turn off setback mode. Selecting HEAT, COOL, or SET particular day or group of days. Also allows you to reset the
AUTO in the SYSTEM menu will turn off setback and resume thermostat to the factory default ENERGY STAR program.
your programmed time and temperature settings.
Simplifies programming by allowing you to copy a particular day’s
NOTE: SETBACK appears on your menu only if the thermostat’s COPY program to another day or group of days.
installer enabled this feature.
Puts the thermostat in manual operation for a permanent or
HOLD temporary time period. Overrides your programmed settings, but
does not lose them.

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Setting the Clock & Day Thermostat Configuration/ Service

1. Press PROGRAM once.
Menu
2. Press ▲ or ▼ to scroll until “CLOCK” is blinking. To
To enter the Service Menu press the UP and DOWN arrows
select, press PROGRAM once.
simultaneously for five (5) seconds. The current display icon
3. Press ▲ or ▼ to scroll through “24Hr”, “AM”, “PM” will be turned off.
options. “24Hr” sets your thermostat to a 24-hour clock.
Service menu number 1 will appear. Push the SYSTEM button
“AM” and “PM” sets your thermostat to a 12-hour clock.
to move to the next Service Menu number. The UP and DOWN
To select your preference, press PROGRAM once.
arrow keys will scroll through your range of options for each
4. Press▲ or▼ to scroll to the current hour. To select, press feature. All changes to the Service Menu are automatically
PROGRAM once. saved when the system times out. Please refer to the service
5. Press ▲ or ▼ to scroll to the current minute. To select, menu table (Annex II‚ page 17).
press PROGRAM once.
6. Press ▲ or ▼ to scroll to the current day. To select,
press PROGRAM once.
Programming Time & Temperature
Your selections have been saved and you have exited program Settings
mode. Your thermostat is ready to function with the factory Your thermostat’s programming feature allows you to divide
preprogrammed ENERGY STAR® program. If you want to up a 24-hour day into four time periods (referred to as “Wake”,
change the program for your particular needs, follow the “Day”, “Evening”, and “Sleep”), and give each time period its
instructions in the “Programming Your Thermostat” section. own setpoint temperatures. Your “Heat Setpoint temperature”
tells your heating system the room temperature to maintain
Setting the Temperature Display during cold weather. The “Cool Setpoint Temperature” tells
your cooling system the room temperature to maintain during
1. Press PROGRAM once.
hot weather.
2. Press ▲ or ▼ to scroll until “°F °C” is blinking. To select,
Factory Program: Your thermostat comes from the factory
press PROGRAM once.
preprogrammed with all seven days of the week set to the
3. Both “°F” and “°C” will be lit, but only one will be blinking. times and temperatures shown in Table 15.
Press .or .to scroll so that the preferred option is blinking.
To select, press PROGRAM once. Table 15: Factory Set-Up of Time & Temperature Settings
Your selection has been saved and you have exited program
Heat Setpoint Cool Setpoint
mode. Time Period Start Time Temperature Temperature
Wake 6:00 am 70° F (21.0° C) 78° F (25.5° C)
Copy Feature Day 8:00 am 62° F (16.5° C) 85° F (29.5° C)
Evening 6:00 pm 70° F (21.0° C) 78° F (25.5° C)
1. Press PROGRAM once.
Sleep 10:00 pm 62° F (16.5° C) 72° F (22.0° C)
2. Press ▲ or ▼to scroll until “COPY” is blinking. To select,
press PROGRAM once.
If the factory program meets your needs, simply follow the
3. Press ▲ or ▼ to scroll to the individual day you want “Setting the Clock & Day” instructions and you’re done.
to copy from. “DFLT” (the default Factory Program) is If you want to change the preprogrammed times and/or
also a copy option. To select your preference, press temperatures, follow the instructions under “Custom Program”.
PROGRAM once.
4. Press ▲ or ▼to scroll to the day or group of days you
want to copy to. To select, press PROGRAM once.
Your selection has been saved and you have exited program
mode.

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Custom Program Time & Temperature Programming

Begin by planning your program. Use the “Custom Program Example
Worksheet” to plan your program time periods and In this example, the thermostat user wants to program the
temperatures you want during each period. You must program weekend with a different schedule from the Factory Program.
four periods for each day. Fill in the complete table, as it will The user wants the Saturday and Sunday program to be
serve as a record of your programs, then follow this procedure: identical.
1. Press PROGRAM once. 1. Press PROGRAM once.
2. Press ▲ or ▼ to scroll until “SET” is blinking. To select, 2. Press ▲ or ▼ to scroll until “SET” is blinking. To select,
press PROGRAM once. press PROGRAM once.
3. Press ▲ or ▼ to scroll to the day or group of days 3. Press ▲ or ▼ to scroll until “SASU” is blinking. To select,
you want to program. To select your preference, press press PROGRAM once.
PROGRAM once.
4. Press ▲ or ▼ to scroll until “WAKE” is blinking. To
Day / Group of Days options are: select, press PROGRAM once.
• To program each day individually, the abbreviations 5. Press ▲ or ▼ .to scroll hours to “8:”. To select, press
are: “M” is Monday, “TU” is Tuesday, “W” is PROGRAM once.
Wednesday, “TH” is Thursday, “F” is Friday, “SA” is
Saturday, and “SU” is Sunday. 6. Press ▲ or ▼ to scroll minutes to “:30”. To select, press
PROGRAM once.
• “MTUWTHFSASU” allows you to give all 7 days of the
week the identical heating & cooling program. 7. User wants to keep same HEAT setpoint temperature. To
keep unchanged, press PROGRAM once.
• “MTUWTHF” allows you to give all 5 weekdays the
identical heating & cooling program. 8. User wants to keep same COOL setpoint temperature.
To keep unchanged, press PROGRAM once.
• “SASU” allows you to give both weekend days the
identical heating & cooling program. Now you’re done setting up the Wake period, and ready to set
• “DFLT” restores all seven days of the week to the up the other three time periods for Saturday and Sunday:
original factory preprogrammed ENERGY STAR • Program the Day period for SASU by repeating steps 1
program. through 8, but in Step 4, select “DAY”.
4. Press ▲ or ▼ to scroll through the four time periods. To • Program the Evening period for SASU by repeating steps
select your preference, press PROGRAM once. 1 through 8, but in Step 4, select “EVE”.
5. Press ▲ or ▼ to scroll to the desired starting hour. To • Program the Sleep period for SASU by repeating steps 1
select, press PROGRAM once. through 8, but in Step 4, select “SLEEP”.
6. Press ▲ or ▼ to scroll to the desired starting minute. To Now you’re done setting up all four time periods for SASU.
select, press PROGRAM once.
7. Press ▲ or ▼ to scroll to the desired HEAT setpoint
temperature. To select, press PROGRAM once.
8. Press ▲ or ▼ to scroll to the desired COOL setpoint
temperature. To select, press PROGRAM once.

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Overriding the Program System Check-out

Your thermostat’s HOLD feature allows you to put the To verify thermostat operation after mounting and wiring it,
thermostat in manual operation for either a specified or perform the following:
indefinite length of time. HOLD will override your programmed
1. Energize the system.
settings, but does not lose them.
2. Set fan to ON. Select each fan speed (TA180 Models) to
Setting up a Temporary Hold verify operation.
You may set up a temporary hold by hours and/or days. 3. Set the System button to AUTO, or available selection.
1. Press PROGRAM once. 4. Using the UP arrow, adjust temperature more than 5°F
above the room temperature to cycle on heating.
2. Press ▲ or ▼ to scroll until “HOLD” is blinking. To select,
press PROGRAM once. 5. Using the DOWN arrow adjust the temperature to 5°F
below room temperature to cycle on cooling.
3. Press ▲ or ▼ to scroll through options. “DAYS” allows
you to specify 0-99 days hold; “HRS” allows you to NOTE: If the thermostat is set to utilize a time-based purge
specify 0-24 hours hold. To select your preference, press cycle (Service menu 16), the thermostat will conduct
PROGRAM once. a 3-min purge on initial start-up if a pipe sensor is
connected.
4. Press ▲ or ▼ to scroll to the desired length of time. To
select, press PROGRAM once.
The thermostat is now on hold for the time period you selected, Condensate Overflow Interrupt
unless you decide to turn it OFF earlier. (See Turning OFF a The remote probe input can be used with a condensate
Hold.) overflow interrupt switch (CO), either in conjunction with a
remote probe (normally closed CO switch) or with local sensing
Setting up a Permanent Hold (normally open CO switch). When the condensate switch
1. Press PROGRAM once. activates, the T180 will display the service wrench and disable
all outputs.
2. Press ▲ or ▼ to scroll until “HOLD” is blinking. To select,
press PROGRAM once.
Figure 7: Remote Probe Installation
3. Press ▲ or ▼ to scroll to “ON”. To select, press
PROGRAM once.
The thermostat is now on hold until you manually turn OFF the
hold. (See Turning OFF a Hold.)

Turning OFF a Hold

1. Press PROGRAM once.
2. Press ▲ or ▼ to scroll until “HOLD” is blinking. To select,
press PROGRAM once. Figure 8: Local sensor installation
3. Press ▲ or ▼ to scroll to “OFF”. To select, press
PROGRAM once.
The thermostat will now resume your programmed time and
temperature settings.
For an easy planning refer to the Custom Program Worksheet
(Annex I‚ page 16).

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Fan Operation
The thermostat may be factory configured for standard or
staged fan operation.

Standard Fan Operation Staged Fan Operation with Temperature

Single setpoint represented in Figure 9. Programming mode Demand
includes multiple setpoints. Single setpoint represented in Figure 10. Programming mode
includes multiple setpoints.
Figure 9: Standard Fan Operation
Speed: Fan speed is selected by User
Temperature Demand - Cool
Figure 10: Staged Fan Operation
Temperature Demand - Cool
Fan High

Fan On: Fan is On continuously Fan Auto: Fan cycles On with demand Fan Medium
Fan On: Fan stays at lowest speed
Fan Low

Control Off System On

-5°F -4°F -3°F -2°F -1°F Set Point 1°F 2°F 3°F 4°F 5°F
-5°F -4°F -3°F -2°F -1°F Set Point 1°F 2°F 3°F 4°F 5°F
System On Control Off

Fan Low
Fan Auto: Fan cycles On with demand Fan On: Fan is On continuously
Fan On: Fan stays at lowest speed

Fan Medium

Fan High
Temperature Demand - Heat
Temperature Demand - Heat

Table 16: Standard Fan Operation Overview Table 17: Staged Fan Operation with Temperature Demand
Menu Description Overview
FAN ON Fan is on continuously and is not dependant on a heat or cool
demand Menu Description
Fan cycles on with a heat or cool temperature demand and FAN ON Fan stages from high to medium to low and stays continuously
FAN AUTO on in the lowest available speed
cycles off with the heat or cool output
FAN SPEED High, medium, or low is selected by the user FAN AUTO Fan stages from high to medium to low and cycles off at set
point
FAN SPEED selected by the thermostat program

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Fancoil Operation Time-Based Purge (Default)

Fancoil operation is either a 2-pipe or 4-pipe configuration 1. The time-based purge cycle will start a 3-min purge
which is determined by jumper selection JP4 (see Installing, cycle and enable the Main Output if any of the following
Mounting and Wiring the Thermostat‚ page 4). conditions occur: transition from OFF to AUTO mode,
Reset event, power cycle, and/or 1-hour timer expires.
Pipe Sensor Operation 2. After the 3 min purge cycle, a pipe sensor reading says:
A pipe sensor can be connected when the thermostat is Pipe is 15°F+ below the zone temp = Summer mode
configured for either 2-pipe or 4-pipe fan coil operation Pipe is 15°F+ above the zone temp = Winter mode Pipe
(see JP4 jumper configuration). The Pipe sensor is used to is within 15°F of zone temp = still Ambiguous
determine the water temperature in the Main Coil. The Pipe 3. If a Winter or Summer mode is determined, the
Sensor should be mounted on the Main Coil supply and appropriate heating/cooling occurs. The thermostat will
wrapped with insulating material. purge and check pipe temperatures again after 1-hour.
Pipe Sensor Input: 10K Remote Probe or a standard On-Off • If step 2 is still ambiguous, all thermostat outputs are
Aqua-stat can be used for summer/winter changeover. ON disabled for 1 hour.
(closed) is winter heating mode and OFF (open) is summer
• After 1 hour, the purge cycle resumes at step 1.
cooling mode.

Purge Cycle Operation HVAC Setback Systems

With a pipe sensor connected, this thermostat will initiate a
purge cycle if the sensed water temperature is ambiguous Setback Operation - Remove JP3
(not adequately hot or cold). The purge cycle algorithm
This is a low level input that is normally open. When switch is
can be either temperature or time based, depending on the
closed, the T180 heating and cooling setback limits are used
configuration of Service Menu 16.
as temperature control points. Fan operation in setback is
cycled with demand. Pressing any button will override setback
Temperature-Based Purge
for 1 hour. Setback will override any user setting unless control
• When an Ambiguous mode is detected and a demand is turned to OFF.
exists, a 3 minute purge timer begins and the Main
Intelligent Occupancy Sensors like the SD200-001 and SD200-
Output is opened.
002 can be used with this input to set the HVAC system to
• After the 3 minute purge cycle, the thermostat checks control at setback limits.
again to see if the water temperature is more than 15°F
from set point, or above 80°F or below 60°F.
Door Switch Only Operation - Install JP3
• If Winter or Summer mode is determined, normal HVAC
operation occurs. If still ambiguous, the thermostat A stand alone door or window switch can be connected to the
checks to see if the COIL temperature is below 60°F or T180 to disable the HVAC system (outputs) if a door or window
above 80°. is left open for more than 2 minutes. A one-time ten minute
override can be initiated by pressing any thermostat key pad.
— Coil < 60°F = Summer Mode.
— Coil > 80°F = Winter mode.
• Purge Cycle is repeated until a non-ambiguous condition
is sensed.
NOTE: If at any time the demand goes away, the thermostat
will abort the purge cycle.

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The T180 thermostat can be used with optional S200 series

occupancy detection equipment. Purchasing and installing this
equipment to compliment the thermostat adds energy savings
by setting back HVAC operation during occupied and
unoccupied times.

Occupancy Operation (Install JP3)

The T180 can be used with PECO S200 series occupancy Operation from an Unoccupied Mode
detection equipment. The occupancy and switch inputs are
designed to connect to the SB200 slave sensor and SE200 In an Unoccupied State, the T180 sets heating and cooling set
door switch. points to setback values, as determined in the service menu. In
this mode, the fan is automatically set to cycle with demand.
The Occupancy Sensor is a low-level switch that is open when
there is occupancy and closed when unoccupied. The T180 will continually monitor the room for occupancy.
The Door Switch is a low-level switch that is open when the Any occupancy detection, including door open, will set the
door is open and closed when the door is closed. This system operation to occupied mode.
requires both an Occupancy Sensor and a Door Switch. In either mode, if the door is left open for more than 2 minutes
the T180 will disable the HVAC system. A one-time ten minutes
Operation from an Occupied Mode override can be initiated by pressing any thermostat keypad.
The T180 operates normally and looks for a door close. A door Optional detection equipment configurations and operation are
close signal initiates occupancy status detection. described below.
If occupancy is detected, the T180 will maintain normal HVAC
control. It then waits for a door open signal before determining
occupancy again.
If no occupancy signal is detected within 2 minutes, the
T180 changes to unoccupied mode and controls at setback
temperature values.

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SB200-001 Occupancy Sensor

The SB200-001 occupancy sensor (Figure 11) serves as an To enable door/window switch only operation, install a jumper to
occupancy sensor for automatic control of a guest room HVAC JP3 (see Installing, Mounting and Wiring the Thermostat‚ page
system. It incorporates an innovative dual delay processor 4) and the occupancy input must be shorted to circuit common.
which allows the sensor to verify the nature of occupancies,
and is capable of eliminating unnecessary actuations of the Figure 11: Optional Equipment Configuration #1
HVAC device due to unintentional passages or short time
occupancies. The sensor may also serve as a slave sensor
(Figure 12, page 15).
The sensor switch is open in occupied mode and closed in
unoccupied mode. An optional door and/or window switch
(Figure 11) is open when the door/window is open and is
closed when the door/window is closed.
NOTE: To use this configuration, a jumper must be installed
to JP3 to allow occupancy input.
An optional door and/or window switch (Figure 11)
can be added for use with the SB200-001 sensor.

Operation
In an occupied mode, the thermostat operates normally
and looks for a door open signal. When the door opens, the
thermostat waits for a door close signal. If the door is open for
more than two minutes, the thermostat turns the HVAC system
outputs to OFF. During this two minute period, if any button
is pressed on the keypad, the time delay is extended to ten
minutes. The time delay can only be extended once. Once the
HVAC outputs transition to OFF, a door closure is required to
re-enable the outputs. When the door closes, the thermostat
starts a two minute timer and tries to detect occupancy. If the
timer expires and no occupancy is detected, the thermostat
transitions to an unoccupied state. If occupancy is detected
while the timer is running, the thermostat will remain in the
occupied mode.
In an unoccupied mode, the thermostat sets heating and
cooling set points to setback values as determined by factory
or user settings. The fan is automatically set to cycle with
demand. The thermostat continually monitors the occupancy
sensor and will enter into occupied mode if occupancy is
detected.
If the installation is only using a door/window switch, the
thermostat will disable the HVAC outputs if this output is open
for longer than two minutes.

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SD200-001 Occupancy Sensor SD200-002 Occupancy Sensor

The SD200-001 occupancy sensor (Figure 12) serves as a The SD200-002 occupancy sensor serves as a stand alone
master sensor for a guest room HVAC management system. master sensor for a guest room HVAC management system.
The sensor provides HVAC operation according to occupancy
The sensor provides HVAC operation according to occupancy
status, as well as door/window switch monitoring, selectable status, as well as selectable high/low temperature setback,
high/low temperature setback, form-C output, slave sensor form-C output, and a five minute door open HVAC shut-off.
connectivity, and a five minute door open HVAC shut-off.
This system provides basic room setback and is ideal for
NOTE: To use this configuration, the jumper to JP3 is control of HVAC in commercial spaces.
removed to allow setback input.
An optional door and/or window switch (Figure 12) NOTE: To use this configuration, the jumper to JP3 is
removed to allow setback input.
and slave sensor can be added for use with the
SD200-001 sensor.
Operation
Operation With each occupancy detection, an OFF delay is started and
In an occupied mode, the SD200-001 occupancy sensor can be set to delay for up to 30 minutes (Figure 13).
(Figure 12) and door switch use advanced microprocessor
logic to determine occupancy. A door open signal will initiate Figure 13: Optional Equipment Configuration #3
occupancy status detection. If the sensor determines that a
room is occupied, it will allow normal HVAC control. The sensor
will wait for another door open signal before determining
occupancy again.
In an unoccupied mode, the sensor continually monitors
the room. Any occupancy detection will set the operation to
occupied mode.

Figure 12: Optional Equipment Configuration #2

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annex I

annex I

Table 18: Custom Program Worksheet

Day Time Period Start Time Heat Setpoint Temperature Cool Setpoint Temperature

Wake

Day
Monday
Evening

Sleep

Wake

Day
Tuesday
Evening

Sleep

Wake

Day
Wednesday
Evening

Sleep

Wake

Day
Thursday
Evening

Sleep

Wake

Day
Friday
Evening

Sleep

Wake

Day
Saturday
Evening

Sleep

Wake

Day
Sunday
Evening

Sleep

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annex II

Table 19: Service Menu Table

Menu Feature Range Description/Comments

1 F° or C° 0-Celsius Determines temperature displays in Fahrenheit or Celsius

1-Fahrenheit (Default)
The amount of time (in seconds) the lowest available fan speed will run after the
3 Fan OFF Delay 0–99 Seconds (0-Default) thermostat outputs are disabled.
4 Range Low 50–90°F, 10–32°C (50°F- Default) The lowest selectable temperature setpoint value.
5 Range High 50–90°F, 10–32°C (90°F- Default) The highest selectable temperature setpoint value.

6 Setback Low 0-OFF 50–82°F, 11–27°C The temperature setpoint value you want the thermostat to Heat to when the
(55°F- Default) T180 is in the Setback mode.
0-OFF 50–90°F, 11–32°C The temperature setpoint value you want the thermostat to Cool to when the
7 Setback High (90°F- Default) T180 is in the Setback mode.

8 Zone Temp Offset +/- 9°F or +/- 4.5°C (0°F-Default) Zone Temperature offset adjusts the sensed Zone Temperature displayed,
allowing calibration in the field.
0-No keypad lockout (Default) This function blocks access to certain features of the device. The Service Menu
9 Keypad Lockout 1-Disables System/Fan/Program is still available if the keypad lockout is enabled.
2-Disables all buttons
1-ON ON-Fan is always on, regardless of demand. Auto-Fan is only ON with heating
10 Fan Mode 2-Auto or cooling demand. ON or Auto-User can choose either selection.
3-ON or Auto (Default)
1-High
11 Fan Speeds 2-Low, High Speeds which are selectable by the user.
3-Low, Med, High (Default)
OFF, Auto OFF, Heat, Cool, Auto (Default)
12 System Mode Sets the system modes the occupant is able to select.
OFF, Heat, Cool Heat, Cool, Auto
When enabled, the unit will control to the Setback setpoints. This function will
0-Disable (Default) also override the user mode setting of OFF if the room temperature is equal
13 Controlled OFF or OFF Override 1-Enable to or above the Cool Setback setpoint or equal to or below the Heat Setback
setpoint.

0-Disable (Default) When enabled, Setback is shown as an available system mode selection. If
14 Front Panel Setback Control Setback mode is selected, the thermostat will control to the current Setback
1-Enable Heat and Setback Cool setpoints.
The Outside Air output will cycle with heat or cool demand if Cycles mode is
0-Cycles (Default) chosen. The Outside Air output is active anytime the thermostat is out of the
15 Cycled Outside Air Damper 1-Continuous OFF mode when Continuous mode is chosen. When in Setback the Outside Air
output will turn OFF.

16 Temperature Based Purge Cycle 0-Time Based (Default) Determines if the Purge Cycle will be Temperature or Time Based.
1-Temperature Based

3°F (Default) A changeover deadband value prevents short cycling between Heating
17 Minimum Dead Band Adjustment 3–10°F, 1.5–5°C and Cooling modes. The value is adjustable to meet various HVAC system
requirements.

18 Factory Default Reset 0-Disable (Default) Toggles between OFF and DFLT. When factory default is desired, select DFLT.
1-Enable

25 Pre-Occupancy Purge 0 Hours (Default) Energizes Fan Low for selected number of hours (0-3) prior to events Wake
0–3 Hours (Occupied 1) and Day (Occupied 2)

30 Cycles Per Hour (CPH) Cooling 3 CPH (Default) Defines the number of cycles per hour for cooling. A selection of 0 disables
0–6 CPH cycling.

32 Cycles Per Hour (CPH) Heating 5 CPH (Default) Defines the number of cycles per hour for heating. A selection of 0 disables
0–12 CPH cycling.

35 Heat Recovery Rate 5°F/Hr (Default) Defines the rate in which the device achieves the comfort setpoint. 0 disables
0–18°F/Hr 0–10°C/Hr ramp recovery.

36 Cool Recovery Rate 5°F/Hr (Default) Defines the rate in which the device achieves the comfort setpoint. 0 disables
0–18°F/Hr 0–10°C/Hr ramp recovery.

40 Minimum OFF Time 4 Minutes (Default) Sets the minimum OFF time for both heat and cool output
1–10 Minutes
0-Disable (Default) If enable is selected, the intermittent fan will operate during setback operation.
45 Intermittent Fan 1-Enable (Default values will be used unless menu 46 and 47 are adjusted.)
5 Minutes (Default) Defines the duration in which fan low will be ON. Fan ON will be activated after
46 Intermittent Fan-ON Time 1–60 Minutes Fan OFF time has passed.

47 Intermittent Fan-OFF Time 25 Minutes (Default) Defines the duration in which fan low will be OFF. Fan OFF will be activated
0–60 Minutes after Fan ON time has passed. A selection of 0 will result in continuous Fan.
71 Revision — Upon menu selection, the firmware and configuration revision will be displayed.
If enable is selected, it will activate the main output (cool output) for 10 minutes.
80 System Test Main Output (Cool) 0-Disable (Default) Fan High will automatically turn ON. If a different menu is selected the output
1-Enable will be disabled.
If enable is selected, it will activate the secondary output (heat output) for 10
81 System Test Main Output (Heat) 0-Disable (Default) minutes. Fan High will automatically turn ON. If a different menu is selected the
1-Enable output will be disabled.
0-Disable (Default)
82 System Test Fan Output 1-Enable Fan Low Output If enable is selected, it will activate the fan output for 10 minutes. If a different
2-Enable Fan Medium Output menu or a different fan speed is selected the output will be disabled.
3-Enable Fan High Output

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Daikin Applied Training and Development

Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high
priority. For training information on all Daikin HVAC products, please visit us at www.DaikinApplied.com
and click on Training, or call 540-248-9646 and ask for the Training Department.

Warranty

All Daikin equipment is sold pursuant to its standard terms and conditions of sale, including Limited
Product Warranty. Consult your local Daikin Applied representative for warranty details. To find your
local Daikin Applied representative, go to www.DaikinApplied.com.

Aftermarket Services

To find your local parts office, visit www.DaikinApplied.com or call 800-37PARTS (800-377-2787).
To find your local service office, visit www.DaikinApplied.com or call 800-432-1342.

This document contains the most current product information as of this printing. For the most up-to-date
product information, please go to www.DaikinApplied.com.

Products manufactured in an ISO Certified Facility.

IM 1019 (10/11) ©2011 Daikin Applied | (800) 432–1342 | www.DaikinApplied.com

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Installation and Maintenance Manual IM 1171-7

Group: WSHP/FCU
Part Number: 910166919
Date: April 2015

Digitally Adjustable Display Sensor

Used with:
Water Source Heat Pumps (WSHP) - Sensor Part No . 910121754
SmartSource™ Units - Models GS & GT
Enfinity™ Units with MicroTech® III Controls - Models CCH, CCW;
VFC, VFW; LVC, LVW; MHC, MHW & VHC, VHF
Fan Coil Units (FCU) - Sensor Part No . 910113679, 910152148
Models With MicroTech III Controls - 910113575

Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Front Panel Button Operation .....................7
Sensor buttons & dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Occupied icon indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Applications ...................................3 “OVERRIDE” on the display . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Sensor functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Fan status & speed indicators . . . . . . . . . . . . . . . . . . . . . . . . . .7
Mounting, Maintenance, Terminations .............. 4 System mode “HEAT/COOL/AUTO/OFF/DHUM” indicators . . .7
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 “ALARM” on the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 “E-SAVE” word on the display . . . . . . . . . . . . . . . . . . . . . . . . . .7
Terminations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 “SETPOINT” word on the display . . . . . . . . . . . . . . . . . . . . . . . .7
Initial Start-up, Display Descriptions ............... 6 “STATUS” word & dot on the display . . . . . . . . . . . . . . . . . . . . .7
Terminal descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Front panel button operation . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Initial start-up occupied sequence . . . . . . . . . . . . . . . . . . . . . . .6 Optional Technician Adjustments..................9
Power fail start-up occupied sequence . . . . . . . . . . . . . . . . . . .6 Optional technician adjustments . . . . . . . . . . . . . . . . . . . . . . . .9
Display descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Diagnostics ................................... 11
Adjusting the setpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Specifications .................................12

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Overview

The display sensor is used in conjunction with the MicroTech a digital display for Temperature, Humidity, Occupancy, Fan
III equipped units as described in the Application Section Speed, System Mode, Alarm, Setpoint and Status indication .
below . The same sensor is used for Water Source Heat Pump Controls include six buttons for Setpoint, System Mode, Fan
(WSHP) and for Fan Coil Units (FCU) with just a hardware Speed, Occupied/Unoccupied Request, and Override Reset .
jumper and menu change during configuration. The sensor has (Figure 1) .

Sensor buttons & dimensions

Figure 1: Digital display sensor - Water Source Heat Pump P/N 910121754, Fan Coil P/N 910113679, 910113575, 910152148

1 .125 2 .784

4 .500

Fan Speed
Setpoint-Down
Setpoint-Up
Occupied/Unoccupied Request
Override Reset
System Mode

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ApplicAtiOns

The display sensor can be used on the products shown in Table 1 .

Table 1: Product usage guide
Used with Digitally Adjustable Sensor
Units Product Models Controls
with Temperature and Humidity Display
Horizontal W .CCH, CCW
Vertical W .VFC, VFW MicroTech III
Enfinity™
Vertical Stacked W .VHC Unit Controller
Water Source Yes
Console W .MHC, MHW
Heat Pumps
Horizontal & SmartSource 1-Stage W .GSH, GSV MicroTech III SmartSource
Vertical SmartSource 2-Stage W . GTH, GTV Unit Controller

Vertical SmartSource Inverter W .DFW Daikin Inverter Controller No

Horizontal FC .H, FH .H MicroTech III Unit Controller Yes
Fan Coils ThinLine™
Vertical FC .V, FH .V

The display sensor for water source heat pump applications is shown in Table 2 .
Table 2: Water source heat pump application guide
Applications
Water-
Cool- Heat- side
Dehumidification Electric Heat
ing ing Econo-
Units Product Models mizer
Smart Hu- Dehu-
3-Way
Dehu- Hot Gas Simpli- midistat midifi- Boil- Supple-
Stages Primary Valve
midifi- Reheat fied Con- cation erless mental
Control
cation trolled Only
Hori- W.CCH,
1 1 No No No No No No No No No
zontal W.CCW
W.VFC,
Vertical 1 1 No Yes No No No Yes1 Yes1 No No
W.VFW
Enfinity
Vertical
W.VHC 1 1 No No No No No No No No No
Stacked
W.MHC,
Water Console 1 1 No No No No No Yes1 Yes1 No No
W.MHW
Source
Heat Hori- Smart-
W.GSH,
Pumps zontal & Source 3 4 Yes Yes Yes Yes Yes Yes Yes Yes Yes
W.GSV
Vertical 1-Stage
Hori- Smart-
W.GTH,
zontal & Source 3 4 Yes Yes Yes Yes Yes Yes Yes Yes Yes
W.GTV
Vertical 2-Stage
Smart-
Vertical Source W.DFW NA NA No No No No No No No No No
Inverter
Note: 1With optional Boilerless controls

Sensor functions 910121754, Water source heat pump

910152148, 910113575, 910113679, Fan- model:
• Display sensor to show room Temperature, room humidity,
coil unit model: fan speed (AUTO/ON), system mode (HEAT/COOL/AUTO/
• Display sensor to show room Temperature, fan speed OFF/DHUM), ALARM, Override and occupancy .
(AUTO/HIGH/MEDIUM/LOW), system mode (HEAT/COOL/ • De-humidification output contact has an adjustable
AUTO/OFF), ALARM, Override and occupancy . setpoint and configurable deadband. This output operates
Note: 910113575 will not display a temperature value as this automatically using the RH setpoint and deadband in the
is measured using a unit-mounted return air sensor. system “AUTO” mode or in the “DHUM” mode .

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Addendum IM 1171 — Digitally Adjustable Display Sensor

MOunting, MAintenAnce, terMinAtiOns

Mounting 8 . Terminate the unit according to the guidelines in the

Termination section .
Location 9 . Attach cover by latching it to the top of the base, rotating it
Avoid mounting on outside walls or in direct sunlight . down and snapping it into place .
10 . Secure the cover by backing out the lock-down screws
Junction Box, (J-Box) using a 1/16" Allen wrench until it is flush with the sides of
1 . Pull the wire through the wall and out of the junction box, the cover
leaving about six inches free .
Note: in any wall-mount application, the wall temperature
2 . Pull the wire through the hole in the base plate . and the temperature of the air within the wall cavity can
3 . Secure the back plate to the box using the #6-32 × 1/2 inch cause erroneous readings.
mounting screws provided . The mixing of room air and air from within the wall
4. Screw the plate firmly to the wall so the foam plate backing cavity can lead to condensation, erroneous readings
is compressed about 50% . and sensor failure. To prevent these conditions, Daikin
5 . Terminate the unit according to the guidelines in the recommends sealing the conduit leading to the junction
Termination section . box with fiberglass.
6 . Attach Cover by latching it to the top of the base, rotating it
down and snapping into place . Maintenance
7 . Secure the cover by backing out the lock-down screws Wipe the display as needed with a damp water only cotton
using a 1/16" Allen wrench until it is flush with the bottom of cloth . Do not use any type of cleaner as it may damage the
the cover . buttons or scratch the display . Do not paint .
Figure 2: Junction box mounting (hardware is provided for
both junction box and drywall installation.) Terminations
Daikin recommends using a twisted shielded pair of at least
22AWG for the power wire connections . The shield should be
Mounting earth grounded only at the power source . Larger gauge wire
base plate may be required for long runs .
Figure 3: Sensor Circuit Board

Cover lockdown screws 1/16" allen

Drywall mounting
1 . Place the base plate against the wall where you want to
mount the sensor .
2 . Mark out the two mounting holes where the unit will be
attached to the wall . Drill a 3/16" hole in the center of each
mounting hole and insert a drywall anchor into the holes .
3 . Drill one 1/2" hole in the middle of the marked wiring
through hole area .
4 . Pull the wire through the wall and out the 1/2" hole, leaving
about six inches free .
5 . Pull the wire through the hole in the base plate .
6 . Secure the base to the drywall anchors using the #6 × 1"
mounting screws provided .
7. Screw the plate firmly to the wall so the foam plate backing
is compressed about 50% .

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terMinAtiOns

All wiring must comply with the National Electric Code (NEC)
CAUTION and local codes . Do NOT run any of this device’s wiring in the
same conduit as other AC power wiring. Tests show that fluctu-
Combination of power wiring (R, 5, DH) and analog (1, 2, 3, 4, ating and inaccurate signal levels are possible when AC power
and 6 to ground) wiring in a common cable may cause signal wiring is present in the same conduit as the signal lines . If you
interference and must be avoided .
are experiencing any of these difficulties, please contact your
Daikin representative .

Figure 4: SmartSource MicroTech III board to digital room temperature sensor wiring
MicroTech III Board I/O Expan-
SmartSource Board
Base Board sion Module

Terminal Block Label TB2-1 TB1-1 TB1-2 TB1-3 TB1-4 TB1-5 TB3-1 TB3-2 TB1-1

Dehumidification
Sensor & Tenant

Shutdown Input
Setpoint Adjust

Room Temp

Unoccupied
Emergency
Unit Status

Fan & Unit

DC Signal
Common
Override
24VAC

Output

Mode

Input

Input
Description

Terminal Label R 1 2 3 4 5 E U 1

Typical Wiring

Terminal Label R (24VAC) 1 (ST) 2 (FM) 3 (SP) 4 (UTS) 5 (GND) 6 (FC) E U DH

Unit Status Output

- Fan Coil Version

Fan Speed Select

Emergency Shut-
Fan & Unit Mode

Dehumidification
Sensor & Tenant
Setpoint Adjust

Room Temp

Unoccupied
DC Signal
Common
Override
24VAC

down
Only
Description

Sensor Digitally Adjustable Room Temperature Sensor (Part No. 910121754)

Figure 5: Fan-Coil MicroTech III board to digital room temperature sensor wiring
MicroTech III Board
SmartSource Board
Base Board
Terminal Block Label TB2-2 TB1-5 TB1-4 TB1-3 TB1-2 TB1-1 TB1-6 TB2-1
Sensor & Ten-
ant Override

Room Temp

Unoccupied
Unit Status

Unit Mode

Fan Mode

DC Signal
Common
Setpoint
24VAC

Output

Adjust

Description

Terminal Label 24 VAC BO9 AI7 AI4 AI3 AI1 COM BI2

Typical Wiring

Terminal Label R (24VAC) 1 (ST) 2 (FM) 6 (FC) 3 (SP) 4 (UTS) 5 (GND) U

Fan & Unit Mode

Select - Fan Coil

Sensor & Tenant

Setpoint Adjust
Version Only

Room Temp

Unoccupied
Unit Status

Fan Speed

DC Signal
Common
Override
24VAC

Output

Description

Sensor Digitally Adjustable Room Temperature Sensor (Part No. 910113679) / 910152148, 910113575

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initiAl stArt-up, DisplAy DescriptiOns

Terminal descriptions Power fail start-up occupied

Note: Refer to "Figure 3: Sensor Circuit Board" on page 4
for terminal locations
sequence
On a power failure, the sensor retains its last known desired
R . . . . . . . . . . . 15 to 28VAC* (AC requires separate shielded wire)
occupancy status in non-volatile memory . On restoration of
(Shield terminated at power source only)
power, the sensor restores its last known desired occupancy
DH . . . . . . . . Dehumidification Contact (Triac from R to DH state from memory. The occupied icon will reflect this with a
@170mA, WSHP Only) . solid (occupied) or hollow (unoccupied) indication and terminal
U . . . . . . . . . . . Unoccupied Contact . (Terminal grounded when in “U” will have voltage applied (occupied) or grounded (unoc-
Unoccupied, VDC only) . cupied) . If the “STATUS/Dot” input on Terminal 1 from the
E . . . . . . . . . . . System “Off” Indication . (Terminal grounded when in controller matches this occupancy state then the occupied
System “Off” mode, VDC only) . status icon will continue to be solid or hollow depending on the
1 . . . . . . . . . . . . Status Indicator Input from the MicoTech III Unit Con- last known state . If the “STATUS/Dot” input on Terminal 1 from
troller . (5VDC) . the controller is different from the sensor occupied state, then
the occupied icon will flash the desired occupancy state every
2 . . . . . . . . . . . . Output Signal, and Fan Mode System (0 to 5VDC) . 8 seconds indicating to the user a mismatch of the desired oc-
Output Signal, System Mode Select for FCU only, (0 cupied status and system occupied status at the controller .
to 5VDC) .
3 . . . . . . . . . . . . Output Signal, Setpoint Adjust from 55º to 95˚F (de-
fault) or ±5º Configurable. (0 to 5VDC) See Setpoint
Display descriptions
Analog Range Tolerances . See Table 3 . Numerical display
4 . . . . . . . . . . . . Output Signal, Room Temp Thermistor Sensor . (10K The factory setting default numerical display (Figure 6) shows
ATP Z curve, 10K-2) . 910113575 tenant override only current temperature (°F or °C) and toggles to humidity and
5 . . . . . . . . . . . . Ground or Neutral* (AC requires separate shielded setpoint display every 5 seconds .
wire) . Common Reference for All Signal Terminals . Figure 6: Sensor numerical display
6 . . . . . . . . . . . . Output Signal, Fan Speed Select for FCU only . (0 to
5VDC) . Terminal 6 not used for WSHP units .
Note: * The AC power wiring at terminals [R] & [5] should be
run in a separate twisted shielded pair to avoid possible
fluctuating and inaccurate signal levels induced into the
other sensor signal wires.
This sensor AC power can be run in the same conduit
with the sensor signal wire as long as it’s run in twisted,
shielded pair and terminated properly.

Setpoint analog range tolerance

Table 3: Setpoint analog range tolerance
Setpoint Analog Tolerance Adjusting the setpoint
55° to 95°F
Scale
-3° to +3°F
Scale
-5° to +5°F
Scale
Terminal 3 Analog
Output
(Temperature or humidity)
@ 55°F (min .) @-3°F (min .) @ -5°F (min .) 0 .0 to 0 .10 vdc
Whichever is displayed at the time, temperature or humidity:
@65°F @-1 .5°F @-2 .5°F 1 .3 to 1 .42 vdc • Push the or button, the displayed setpoint can be
adjusted up or down .
@75°F @0°F @0°F 2 .12 to 2 .2 vdc
• After an adjustment, the setpoint is displayed for 5 seconds.
@85°F @+1 .5°F @+2 .5°F 2 .58 to 2 .63 vdc
During the setpoint display push (System Mode Button)
@95°F (max .) @+3°F (max .) @+5°F (max .) 3 .0 to 4 .0 vdc
to switch between the temperature display or the humidity
display .
Initial start-up occupied sequence • Push the or button, the displayed setpoint can be
On initial installation power-up, the sensor is in “Occupied” adjusted up or down . (See "Front Panel Button Operation"
mode with a solid occupied icon and DC voltage at terminal on page 7 for details .)
“U” . If the “STATUS/Dot” input on Terminal 1 from the controller
The unit can also be programmed in the field to “Setpoint Only”
indicates occupied (“ON” continuous), then the unit continues
display or Setpoint Lockout . See the "Optional Technician
to stay “Occupied” . If the “STATUS/Dot” input on Terminal 1
Adjustments" on page 9 .
from the controller indicates unoccupied (5 seconds “ON” then
5.5 seconds “OFF”), then the occupied icon will flash the de-
sired occupancy state every 8 seconds, indicating to the user a
mismatch of the desired occupied status and system occupied
status at the controller

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 Addendum IM 1171 — Digitally Adjustable Display Sensor

FrOnt pAnel ButtOn OperAtiOn

Occupied icon indicator “STATUS” word & dot on the

The Occupied Icon on the left side of the display indicates
whether the room sensor is in the Occupied or Unoccupied display
Mode, (Figure 7) .
The Status “Dot” on the display indicates the unit status
Figure 7: Occupied & unoccupied icons or alarm condition . It is turned “On” and “Off” by interpreting the
status input from the controller on terminal 1 .
= “Occupied” = “Unoccupied”
Table 4 shows the alternating conditions and sensor status .
Table 4: WSHP unit status input timing definition
Solid is Occupied and Hollow is Unoccupied .
Status Dot
• A blinking icon every 8 seconds indicates an override Status Dot "ON" WSHP Display
"OFF" (0 vdc)
request that has not been fulfilled. (+ 5 vdc) time Availability Indication
Time
Controller Off (or
“OVERRIDE” on the display 0 .5 seconds 0 .5 seconds
Network
“ALARM” On
“Wink” operation
The “OVERRIDE” word indicator in the top left corner il-
active)
luminates when the sensor is signalled by the “Status” input
Unit running in
(Terminal 1) .
Night
This is initiated from the Override/Reset Button at first and Setback Override
0 .0 seconds Continuous “OVERRIDE” On
then confirmed from the “Status” input code which keeps the Mode or
“OVERRIDE” indicator on . no power to the
unit

Fan status & speed indicators 0 .5 seconds 5 .5 seconds

Unoccupied
Mode
Hollow Occupied
Icon
“Fan & No Wavy Lines” indicate the fan is Off . 5 .5 seconds 0 .5 seconds Standby Mode “E-SAVE” On
Solid Occupied
Continuous 0 .0 seconds Occupied Mode
“Fan & 2 Wavy Lines” indicate Low . Icon

Table 5: Fan Coil (FCU) unit status input timing definition

“Fan & 3 Wavy Lines” indicate Medium . Status Dot
Status Dot "ON" Fan Coil Display
"OFF" (0 vdc)
(+ 5 vdc) time Availability Indication
Time
“Fan & 4 Wavy Lines” indicate High, and the word
0 .3 seconds 0 .3 seconds Alarm Active “ALARM” On
“AUTO” indicate fan Auto mode .
Unit running in

System mode “HEAT/COOL/AUTO/

Night
Setback Override
0 .0 seconds Continuous “OVERRIDE” On
Mode or
OFF/DHUM” indicators no power to the
unit
The “HEAT/COOL/AUTO/OFF/DHUM” Mode Indicators on Unoccupied Hollow Occupied
the bottom of the display describe each of the sensor’s modes . 0 .5 seconds 5 .5 seconds
Mode Icon
The mode is changed by pushing the System Mode button on 5 .5 seconds 0 .5 seconds Standby Mode “E-SAVE” On
the sensor . (Dhum is only used on WSHP units .)
Solid Occupied
Continuous 0 .0 seconds Occupied Mode
Icon
“ALARM” on the display 3 .0 seconds 3 .0 seconds
Calibration Mode/
No Change
The “ALARM” word indicator on top illuminates when the sen- Network Wink

sor interprets the “Status” input code from the controller as an

alarm . See Table 4 on page 7 . Front panel button operation
System mode indication (FCU only)
“E-SAVE” word on the display
The “E-SAVE” word indicator on top illuminates when the “HEAT/COOL/AUTO/OFF”
sensor interprets the “Status” input code from the controller as The “HEAT/COOL/AUTO/OFF” Mode Indicators on the bottom
Standby Mode (See Table 4 on page 7) . of the display show the mode status of the sensor and are
changed by pushing the System Mode button .
“SETPOINT” word on the display • “HEAT” on the display means the unit will only provide
heating .
The “Setpoint” word on top illuminates when the sensor is
displaying the setpoint on the numerical display (Temperature • “COOL” on the display means the unit will only provide
or Humidity) . When this “Setpoint” indicator is off, the numerical cooling .
display shows the actual room temperature or humidity . • “AUTO” on the display means the unit switches
automatically to provide cooling or heating .
• “Off” on the display means the unit will not provide cooling,
heating or fan operation .
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FrOnt pAnel ButtOn OperAtiOn

There should always be one indicator “ON” unless the sensor “Fan & 4 Wavy Lines & AUTO” - the fan runs on a
has no power or has a problem . The System Mode Analog Out- call for HEAT/COOL/DHUM . Otherwise the fan is off .
put voltage on Term . 2 will change based on the system mode .
“Fan & 4 Wavy Lines” - the fan runs continuously
Fan speed indication (FCU only) regardless of the system mode setting of HEAT/
COOL/AUTO/DHUM .
“AUTO/HIGH/MEDIUM/LOW” “Fan & No Wavy Lines” - the fan is Off when the
The Fan Speed Indicators on the display show the fan speed system mode is “Off” .
status (AUTO/HIGH/MEDIUM/LOW) and are changed by push-
ing the Fan Mode button . Override/Reset button (timed
“Fan & 4 Wavy Lines & AUTO” - the fan stages up override & alarm reset)
or down automatically depending on the demand for When the “Override/Reset” Button is pressed, the thermistor
HEAT/COOL . sensor is shorted . If held for more than 3 seconds but less than
“Fan & 4 Wavy Lines” - the fan runs continuously at 11 seconds, it puts the controller into a timed Occupied Over-
high speed regardless of the system mode setting of ride (the time is set by the controller) . If the unit is in alarm,
HEAT/COOL/AUTO . then holding the “Override/Reset” Button for more than 11 sec-
“Fan & 3 Wavy Lines” - the fan runs continuously onds will clear all alarms in the controller but only if the cause of
at medium speed regardless of the system mode the alarm has already returned to its non-alarm condition . Some
setting of HEAT/COOL/AUTO . alarms will not reset from the digital room sensor .
“Fan & 2 Wavy Lines” - the fan runs continuously at In this case, power to the unit must be cycled off for 5 seconds
low speed regardless of the system mode setting of to clear the alarm . Continuously resetting alarms from the
HEAT/COOL/AUTO . room sensor could damage the controller . Please call a service
technician when repeated alarm resets are required to keep
“Fan & No Wavy Lines” - Indicates the fan is Off . the unit operational .
There should always be one indicator “On” unless the sensor
has no power or has a problem . The Fan Speed Analog Output Occupied button (occupied/
voltage on Terminal 6 will change based on the fan speed unoccupied request)
selection . Note: Terminal “U” opens HI to source power on power-up
System mode indication (WSHP only) “Occcupied”
When the “Occupancy” Button is pushed, the current “Occu-
“HEAT/COOL/AUTO/OFF/DHUM” pied” or “Unoccupied” status of the sensor will be toggled to
The “HEAT/COOL/AUTO/OFF/DHUM” Mode Indicators on the the opposite condition for 20 seconds . Both the display and “U”
display show the mode status of the sensor and are changed terminal output reflect the new status during the 20 seconds.
by pushing the System Mode button . If a confirmation signal is received from the controller into
• “HEAT” on the display means the unit will only provide the Status Input terminal “1” within 20 seconds, then the new
heating . occupancy condition remains; otherwise the “U” terminal will
return to the original state and the “Occupied” Icon will flash the
• “COOL” on the display means unit will only provide cooling .
desired occupancy state every 8 seconds .
• “AUTO” on the display means the unit can switch
automatically to provide cooling or heating or Up & down setpoint buttons
dehumidification. ( temp or humidity)
• “OFF” on the display means the unit will not provide Press the Setpoint “Up/Down” Buttons once to enter the Set-
cooling, heating, dehumidification or fan operation (“E” point Adjustment Mode . View the display to see whether the
terminal goes Low) . unit is in Temperature or Humidity Setpoint mode . If needed,
• “DHUM” on the display means that only dehumidification press the “System Mode” Button once to toggle to the desired
will operate . Setpoint . The current setpoint value will display for 5 seconds .
There should always be one indicator “On” unless the sensor When the “Up/Down” Buttons are pressed in this mode, the
has no power or has a problem . The System Mode Analog temperature or humidity setpoint will change in one degree or
Output voltage on Terminal 2 will change based on the system percent (%) increments . It will only change within the tempera-
mode selection . ture setpoint range that was ordered (or the setpoint range that
was set via the Program Mode) .
Fan indication (WSHP only) The humidity setpoint is always between 40% to 90% . After 5
“AUTO/ON” seconds of no buttons being pushed, the sensor will go into the
standard display mode .
The Fan Indicators on the left side of the display show the fan
status (AUTO/ON) of the sensor and are changed by pushing
the Fan Mode button .

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OptiOnAl techniciAn ADjustMents

System mode button (FCU has Program mode menu pages:

HEAT/COOL/AUTO/OFF) or (WSHP (Display required)
has HEAT/COOL/AUTO/OFF/DHUM) Note: Both J50 “F/C” and J50 “MDL” jumpers must be
When the “System” Button is pushed, the unit switches be- configured first before entering the program “PRG” mode.
tween system modes .
Entering program mode and making
Fan mode button (FCU has AUTO/ changes
HIGH/MEDIUM/LOW/OFF) (WSHP 1 . Install the J50 “PRG” jumper onto both pins with power
has AUTO/ON) turned on to enter Program Mode .
When the “Fan” Button is pushed, the fan speed changes in 2 . Press the Up/Down Buttons to advance to the desired
order from one speed to another . program parameter from P1 through P14 (Parameters
described below) .
Optional technician adjustments 3. Press the Occupancy Button to select the specific program
Note: The sensor setup is factory set per your order. Setup parameter to change .
adjustments are not required 4 . Change the parameter value as described in the Mode
The unit is shipped ready to install per the order and does Menus section below . (Usually with the Up/Down Button)
not require any special setup or programming . The following 5 . Press the Occupancy Button again to set the selected
Program Menu Changes are available if the installer decides parameter .
to change the factory settings . The Setpoint Up/Down Buttons 6 . Press the Up/Down Buttons to proceed to the next
and Occupancy Button are used in the Programming Mode to parameter (as in Step 2 above) .
make Menu changes and selection .
7 . When done making changes, remove the J50 “PRG”
Set-up jumper (J50) configuration jumper (and place over one pin) . This action will end the
Programming Mode and store all the values . The sensor is
(Factory set per order) now in the Run Mode .

Program mode menu pages

CAUTION P1 Setpoint Mode (Factory set to temperature value “S1” .
Turn off power to the unit before reconfiguring the F/C or MDL J50 ºF/ºC must be set before entering the program
jumper settings .Damage to the sensor board can occur if jump- “PRG” mode) .
ers are moved while there is power to the unit and sensor . • S1 – “UP/DOWN” to select setpoint to absolute
temperature setpoint value . Actual setpoint value set in
Figure 8: J50 Jumper P4 and P5 . Example: 55ºF (13º C) to 95ºF (35º C) .
• S2 – “UP/DOWN” to select setpoint to relative
temperature setpoint value of ±5 .0ºF (±2 .8ºC) .
• S3 – “UP/DOWN” to select setpoint to relative
temperature setpoint value of ±3 .0ºF (±1 .67ºC) for
Enfinity systems.
P2 Temperature Offset (Factory set to zero) .
Label description setting • “UP” to increase offset up to +2.
PRG Program Mode Program Mode = Jumper installed • “DOWN” to decrease offset down to -2.
or Run Mode for Program Mode (See Program P3 Humidity Offset (Factory set to zero) .
Menu below) . • “UP” to increase offset up to +5
Run Mode = Jumper removed for • “DOWN” to decrease offset down to -5.
Run Mode (Place jumper on one P4 Setpoint Low Range (Factory set to 55°F or 13°C
pin only) . depending on J50 °F/°C setting) .
F/C ºC Indication ºC = Jumper installed for ºC . P1 in S1 Mode: Adjustment range 55 to 65°F or 13 to
or ºF Indication ºF = Jumper removed for ºF 18°C .
Indication (Place jumper on one
• “UP” to increase the low setpoint range up to 65°F
pin only) . 910152148, 910113575
or 18°C .
MDL Sets the Model 910113679 = Jumper removed for
• “DOWN” to decrease the low setpoint range down
FCU or WSHP FCU (Default for units ordered
to 55°F or 13°C .
as FCU) .
910121754 = Jumper installed for
WSHP (Default for units ordered
as WSHP) .

www .DaikinApplied .com 9 IM 1171-7

IM 1152-10 115
Addendum IM 1171 — Digitally Adjustable Display Sensor

OptiOnAl techniciAn ADjustMents

P1 in S2 Mode: No adjustment . Factory set to -5°F P9 Dehumidification Dead band (DB) (Factory set to
(-2 .8°C) . 2%), (WSHP Only) .
P1 in S3 Mode: No adjustment . Factory set to -3°F 2 “UP/DOWN” to set Dead band at 2% (On at setpoint
(-1.6°C) for Enfinity systems. SP, Off at SP-DB) .
P5 Setpoint High Range (Factory set to 95°F or 35°C 3 “UP/DOWN” to set Dead band at 3% (On at setpoint
depending on J50-°F/°C setting) . SP, Off at SP-DB) .
P1 in S1 Mode: Adjustment range 85 to 95°F or 29 to 4 “UP/DOWN” to set Dead band at 4% (On at setpoint
35°C . SP, Off at SP-DB) .
• “UP” to increase the high setpoint range up to 95°F 5 “UP/DOWN” to set Dead band at 5% (On at setpoint
or 35°C . SP, Off at SP-DB) .
• “DOWN” to decrease the high setpoint range down P10 Display Mode (Factory set to #16 for WSHP units,
to 85°F or 29°C . factory set to #4 or #3 for FCU Units) .
P1 in S2 Mode: No adjustment . Factory set to 5°F • “UP/DOWN” to set display mode.
(2 .8°C) . • Choose from numbered list below. Choices 5-16 will
P1 in S3 Mode: No adjustment . Factory set to 3°F not be shown if P12 = nOH .
(1.6°C) for Enfinity systems. 1 = No value on the main display (Blank) .
P6 Fan Lock Mode (Factory set to Unlocked “Unl”) 2 = Temperature Value (TV) .
• “UP/DOWN” to set Fan Lock mode. Choose from 3 = Temperature Setpoint (TSP) (FCU Default 910113575) .
list below: 4 = Temperature Value & Temperature Setpoint (FCU
All Models Unl Enables fan to be controlled by the Default 910152148, 910113679) .
Sensor Fan button 5 = Humidity Value (HV) .
All Models FA Locks fan to the Fan Auto position 6 = Temperature Value & Humidity Value .
(No Sensor Fan button control)
7 = Humidity Value & Temperature Setpoint .
WSHP Models FO Locks fan to the Fan On position
(No Sensor Fan button control) 8 = Temperature Value, Temp Setpoint & Humidity
Value .
FCU Models FH Locks fan to the Fan High speed
position (No Sensor Fan button control) 9 = Humidity Setpoint (HSP) .
FCU Models Fd Locks fan to the Fan Medium speed 10 = Temperature Value & Humidity Setpoint .
position (No Sensor Fan button control) 11 = Temperature Setpoint & Humidity Setpoint .
FCU Models FL Locks fan to the Fan Low speed 12 = Temperature Value & Temp Setpoint & Humidity
position (No Sensor Fan button control) Setpoint .
FCU Models Fo Locks fan to the Fan Off position 13 = Humidity Value & Humidity Setpoint .
(No Sensor Fan button control) 14 = Temperature Value, & Humidity Value & Humidity
P7 System Lock Mode (Factory set to Unlocked “Unl”) Setpoint .
• “UP/DOWN” to set System Lock mode. Choose 15 = Humidity Value & Temperature Setpoint & Humidity
from list below: Setpoint .
Unl Enables System to be controlled by the Sensor 16 = Temperature Value & Temperature Setpoint &
System Mode button . Humidity Value & Humidity Setpoint (WSHP Default) .
UH Locks System to the Heat mode (No Sensor P11 Setpoint Button Lockout (Factory set to “0”: Temp . &
System button control) . Humidity Setpoint Enabled .
UC Locks System to the Cool mode (No Sensor Note: 1. Selections in P11 will impact Menu P10).
System button control) . 2. After changing P11 option, remove PRG jumper on
UA Locks System to the Auto mode (No Sensor Sys- J50 to exit programming mode and refresh options.
tem button control) . In order to make additional programming changes,
UO Locks System to the Off mode (No Sensor Sys- PRG Jumper must be reinstalled to enter
tem button control) . programming mode.
Ud Locks System to the Dhum mode (No Sensor 0 Both Temperature & Humidity Setpoints are enabled
System button control) . (No Setpoint lockout, WSHP Units Only) .
P8 Display Resolution (Factory set to ±0 .5 resolution, “0 .5”) . 1 Humidity Setpoint Only is Enabled (Temperature
setpoint is locked out, WSHP Units Only) .
0.1 “UP/DOWN” to set resolution to ±0 .1, (Rounds up
at .05) . 2 Temperature Setpoint Only is Enabled (Humidity
setpoint is locked out) .
0.5 “UP/DOWN” to set resolution to ±0 .5, (Rounds up
at .08) . 3 Both Temperature & Humidity Setpoints are Disabled
(Full Setpoint lockout) .
1 “UP/DOWN” to set resolution to ±1 .0, (Rounds up at .5) .

IM 1171-7 10 www .DaikinApplied .com

116 IM 1152-10
 Addendum IM 1171 — Digitally Adjustable Display Sensor

OptiOnAl techniciAn ADjustMents

P12 Dehumidification Enable/Disable Override/Reset not working

nOH Dehumidification is Disabled (Factory default • Measure the resistance to ground at the sensor output
for FCU Units) . terminal (Term . 4) . When pushing the Override Button, it
HuA Dehumidification is Enabled (Factory default should show a short . If not, replace the sensor .
for WSHP Units) .
No fan voltage signal
P13 Occupancy Button Enable/Disable (Factory set to
• Be sure the termination and wiring is correct and the
enabled “ObE”) .
controller is set up properly .
ObE Occupancy Button Enabled (Factory default)
• Replace unit if all checks are okay.
Obd Occupancy Button Disabled
P14 Firmware Version - XXX.X No system voltage signal
P15 For Units with a BACnet or lOnwOrks • Be sure the termination and wiring is correct and the
Communications Module controller is set up properly .
Setpoint Calibration Offset (Factory set to “0” .) • Replace unit if all checks are okay.
• “UP” to increase offset up to +100 will raise the MicroTech De-humidification not working
III perceived set point from the sensor . • Adjust the System Mode to DHUM and check terminal DH
• “DOWN” to decrease offset down to -100. This will lower for voltage .
the MicroTech III perceived set point from the sensor . • Change the RH setpoint above and below the ambient RH
Calibrate the displayed set point to the set point value sent to prove the output contact .
to the MicroTech III as follows: • Replace unit if it still doesn’t work.
1 . Set the digital room sensor displayed set point to 90° F .
Occupied not working
2 . Observe the local set point via the BAS/EMS connected
by the BACnet or LonWorks Communications Module . • Verify that this terminal is in a powered circuit. Measure
the voltage to ground at the occupied terminal (U) . When
3 . Adjust the Configuration Menu P15 on the sensor until the
pushing the Occupied Button (<2 secs), it should read close
local set point and the displayed set point are equal .
to 0 volts . When you lift the button it should read high volts .
P15 For Units without a BACnet or lOnwOrks
• Replace unit if it still doesn’t work.
Communications Module
Setpoint Calibration Offset (Factory set to “0” .) “Err” shown on the screen
• “UP” to increase offset up to +100 will raise the MicroTech • This indicates that the temperature and humidity sensing
III perceived set point from the sensor . element has failed .
• “DOWN” to decrease offset down to -100. This will lower FAN key does not change fan mode
the MicroTech III perceived set point from the sensor .
• Check to verify FAN is not locked out in Programming Mode
The Setpoint Calibration Offset can be calculated using the Menu Page P6 .
following formula:
ROUND [(Controller Vdd / Sensor Vdd )*1000]-1000 MODE key does not change system mode
Example: • Check to verify Mode is not locked out in Programming
Mode Menu Page P7 .
Given: Controller Vdd = 5 .15VDC
Sensor Vdd = 4 .95 VDC Up or Down key does not change setpoints
The programmed Calibration Offset would be • Check to verify Set points are not locked out in
[(5 .15/4 .95)*1000] -1000 = 40 Programming Mode Menu Page P11 .
Solid Man goes away after 20 seconds
Diagnostics • Occupancy Request was not acknowledged by Main
controller, check wiring of Status Signal from controller .
Problem & possible solution
No display
• Check the power connections and power voltage level
• Replace unit if power is okay.
No temperature signal
• Be sure the termination and wiring is correct and the
controller is set up properly . Make sure the “Override/
Reset” button is not stuck down .
• Replace unit if all checks are okay.

www .DaikinApplied .com 11 IM 1171-7

IM 1152-10 117
Addendum IM 1171 — Digitally Adjustable Display Sensor

speciFicAtiOns

Supply voltage Display

AC Hot . . . . . . . . . . . . . . . . . . . . . . (R) 7 to 28VAC, 24VAC nominal, 0 .17VA LCD
GND/Neutral . . . . . . . . . . . .(5) Sensor common reference ground . Overall size . . . . . . . . . . . . . .2 .04"W × 1 .33"H .
Main Digits . . . . . . . . . . . . . . .±999 .9 Digits @0 .6"H
Sensor
Resolution . . . . . . . . . . . . . . . .0 .5 displayed value, 0 .1 for offset adjust
Temperature . . . . . . . . . . . .10K-2 Thermistor, ±0 .36ºF (±0 .2ºC)
Main Value . . . . . . . . . . . . . . .Temp, Humidity & Setpoint, toggling
Humidity . . . . . . . . . . . . . . . . . . .2% Accuracy from 20 to 80%,
every 5 sec .
Capacitive .
Eng . Units . . . . . . . . . . . . . . . .ºF, ºC, %RH .
Outputs System . . . . . . . . . . . . . . . . . . . . .Heat/Cool/Auto/Off/Dhum .
Unoccupied . . . . . . . . . . . . . .(U), Unoccupied = Digital low to ground Fan . . . . . . . . . . . . . . . . . . . . . . . . . .Auto/High/Medium/Low .
(Same ground as power source), Occupied Icon . . . . . . . . . . Hollow = Unoccupied, Solid = Occupied .
100mA @5VDC max .
Function . . . . . . . . . . . . . . . . . . .Override, Alarm, E-Save, Setpoint
Dehumidify . . . . . . . . . . . . . . .(DH), = Dehumidify = Voltage output
(same as supply voltage), 170mA max . Field configuration menu
System Off . . . . . . . . . . . . . . .(E), System Off = Digital low to ground
(Requires J50 PRG jumper to be “On”)
(Same ground as power source),
100mA @5VDC max . Offset . . . . . . . . . . . . . . . . . . . . . . .Temp or Humidity display, ±2ºF (±1 .0ºC)
and ±5% RH .
Fan Speed . . . . . . . . . . . . . . .(2 or 6), Analog, 0 to 5 VDC .
Setpoint range . . . . . . . . .Default 55º to 95ºF (13º to 35ºC), ±3ºF
System Mode . . . . . . . . . . .(2), Analog, 0 to 5 VDC .
(±1 .6ºC) or ±5ºF (±3ºC) . Adjustable
Setpoint . . . . . . . . . . . . . . . . . . .(3), Analog, 0 to 5 VDC . between 55º to 95ºF, ±3ºF (±1 .6ºC) or
Temperature . . . . . . . . . . . .(4), Analog thermistor resistance . ±5 .0ºF (±2 .8ºC) .
Fan Lock-in . . . . . . . . . . . . . .Any fan speed or off can be locked in
Sensor controls System Lock-in . Any system mode can
Setpoint . . . . . . . . . . . . . . . . . .2 Up/Down buttons be locked in
System . . . . . . . . . . . . . . . . . . . . .1 button to cycle between Heat/Cool Resolution . . . . . . . . . . . . . . . .Main display can be default .5, or .1 or
Auto/Off/Dhum/Off 1 .0 (ºF, ºC or %) .
Fan . . . . . . . . . . . . . . . . . . . . . . . . . .1 button to cycle between Auto/High/ Display Mode . . . . . . . . . . .Temp only, RH only, Setpoint only or
On . any combination .
Occupied . . . . . . . . . . . . . . . . .1 button to check and request change Dhum DB . . . . . . . . . . . . . . . . . . Dehumidify Dead Band adjust, 2%
in Occupancy Status . default .
Override/Reset . . . . . . .1 button to request timed occupancy
override and reset alarms . Enclosure material
Inputs: . . . . . . . . . . . . . . . . . . . . . .(1), Controller alarm & system status, ABS Plastic, UL94V-0 .
5VDC max .
Ambient
Termination: . . . . . . . . . . . . .10 Terminals, 16 to 22 AWG .
32º to 122ºF (0º to 50ºC), 0 to 95%RH, Non-condensing .
Mounting: . . . . . . . . . . . . . . . . .Standard 2" × 4" J-Box or Drywall
Agency
Field setup jumper J50
Restriction of the use of certain Hazardous Substances
PRG . . . . . . . . . . . . . . . . . . . . . . . . . . Program Mode, On = Program, Off = (RoHS) .
Run .
F/C . . . . . . . . . . . . . . . . . . . . . . . . . . .Display Units, On = ºC, Off = ºF .
MDL . . . . . . . . . . . . . . . . . . . . . . . . .MODEL, On = WSHP . Off = FCU .

IM 1171-7 ©2015 Daikin Applied (04/15) | (800) 432–1342 | www .DaikinApplied .com

118 IM 1152-10
 Addendum IM 831 — Thermostat Conversion Kit

Installation and Maintenance Manual IM 831

Group: Applied Air Systems
Part Number: 667757200
Date: October 2013

Fan Coil Thermostat Conversion Kit

to Eliminate 3-speed Switch Capability

Safety Information Procedure

The installation of this equipment shall be in accordance CAUTION
the regulations of authorities having jurisdiction and all
applicable codes. It is the responsibility of the installer to If the FAN Switch remains in the left-most (Off) position
determine and follow the applicable codes. This equipment the thermostat will NOT function properly.
is to be installed only by an experienced installation
company which employs trained personnel. 1. Carry out this procedure before mounting the
thermostat or applying power to it. If the thermostat
WARNING is already mounted, turn off all power to it before
Rigorously adhere to field wiring procedures regarding proceeding.
proper lockout and tagout of components. 2. Slide the FAN switch on the front of the thermostat to
the setting at which you want the motor to run all the
WARNING time.
To avoid electrical shock, personal injury or death: 3. Remove the cover from the thermostat by gently
1. Installer must be qualified, experienced technician. prying with behind the left hand edge of the cover
with a small screwdriver, then pulling it off as shown
2. Disconnect power supply before installation to
in Figures 1 and 2.
prevent electrical shock and damage to equipment.
NOTE: Once you exchange thermostat covers, the user
can no longer change this setting.
Introduction 4. Adjust the dip switch and jumpers to your desired
configuration (see thermostat installation manual).
This thermostat conversion kit number 107345245 converts
a fan coil unit thermostat to a thermostat without a 3-speed 5. Pull off the fan slide switch cap (Figure 3). Note: Be
switch. The thermostat kit includes a cover that does careful not to change the position of the switch you
NOT have an opening for the 3-speed control switch. The set in Step 2.
following is the proper procedure to convert the thermostat. 6. Place the new thermostat cover that does not have the
3-speed switch opening on the thermostat (Figure 4).
IM 831 Thermostat Conversion Kit

IM 1152-10 119
Addendum IM 831 — Thermostat Conversion Kit

Figure 1: Opening the Thermostat Cover Figure 3: Remove Plastic Fan Slide Switch Cap

Pry behind left hand

edge of cover to remove

Figure 2: Accessing The Components Figure 4: New Thermostat Cover

Pull left end of cover

away until tabs at
right end are cleared

Without 3-Speed
Switch Opening

IM 831 (10/13) ©2013 Daikin Applied | (800) 432–1342 | www.DaikinApplied.com

120 IM 1152-10
 Addendum IM 763 — Automatic Changeover Switch

Installation and Maintenance Manual IM 763

Group: Applied Air Systems
Part Number: 106333101
Date: October 2013

Automatic Changeover Switch

for Automatic Seasonal Changeover on Two-pipe Systems

WARNING Figure 1: Automatic Changeover Switch

(Kit P/N 039398600)
Installation and maintenance are to be performed only by
qualified personnel who are familiar with and in compliance
with state, local and national codes and regulations, and
experienced with this type of equipment.

CAUTION
Sharp edges and coil surfaces are a potential injury
hazards. Avoid contact with them
These line voltage changeover switches are designed to
switch a thermostat from heating to cooling based on a
change in supply water temperature. The switches can be
mounted on 5/8" or 7/8" O.D. copper tube or iron pipe.
Both models are easily mounted to the supply piping with a
simple spring clip included with the thermostat.

Models
The 039398600 model (Fig. 1) has 110 in. leads and is the
standard changeover switch. The 06361801 model (Fig. 2)
has the same operating characteristics and includes 18 in.
conduit and connector.
Both models are snap acting, SPDT switches.
Terminal No. 1 has a black wire and is the common (C)
connected to valve (valve cycle) or to the yellow wire of the
speed switch (fan cycle).
Terminal No. 2 has a red wire and is normally open (N.O.).
Connected to the heating (red) wire of the thermostat.
Terminal No. 3 has a blue wire and is normally closed
(N.C.). Connected to the cooling (blue) wire of the
thermostat.
At approximately 65°F, plus or minus 6°F, terminals 1 and
3 are closed and terminals 1 and 2 are open. At 95°F, plus
or minus 6°F, terminals 1 and 2 are closed and terminals 1
and 3 are open.
IM 763 Discharge Conversion Kit

IM 1152-10 121
Addendum IM 763 — Automatic Changeover Switch

Specifications
Table 26: Electrical Rating Figure 2: Automatic Changeover Switch
(Kit P/N 061361801)
Model Voltage FLA LRA Restive
039398600
24 – 240 15 – 5 90 – 30 25
061361801
Changeover Range: 65°F to 95°F (18°C to 35°C)
Maximum Operating 220°F Fluid Temperature @ 125°F Ambient
Temperature Limits (104°C Fluid Temperature @ 52°C Ambient)
Agency Approval UL Listed, CSA Approved
The specifications above are nominal and conform to generally acceptable
industry standards. Daikin is not responsible for damages resulting from
misapplication or misuse of its products.

IM 763 (10/13) ©2013 Daikin Applied | (800) 432–1342 | www.DaikinApplied.com

122 IM 1152-10
 Addendum OM 1111

Operation and Maintenance Manual OM 1111-2

Group: Applied Air Systems
Part Number: OM 1111
Date: October 2015

MicroTech® Unit Controller with

I/O Expansion Module for Fan Coils
Models FCHH / FCHC / FCHR and
Cabinet Unit Heaters, Models FHHH / FHHC / FHHR
OM 1111-2 MicroTech Controller

IM 1152-10 123
Addendum OM 1111

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Miscellaneous Control Definitions . . . . . . . . . . . . . . 21

General Use and Information . . . . . . . . . . . . . . . . . . . 3 Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
MicroTech Baseboard . . . . . . . . . . . . . . . . . . . . . . . . . 4 Replacing a MicroTech Circuit Board . . . . . . . . . . . 23
Control Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Appendix B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Control Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 MicroTech Unit Controller with an optional
I/O Expansion Module . . . . . . . . . . . . . . . . . . . . . . . . . 6 LonWorks® Communication Module . . . . . . . . . . . . . 24

Control Boards Terminals and Connectors Appendix C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 MicroTech Unit Controller with an optional
Fan Coil/Cabinet Unit Heater Unit Control . . . . . . . . 13 BACnet Communication Module . . . . . . . . . . . . . . . 25

Fan Coil/Cabinet Unit Heater Control Appendix D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Output Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Typical Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . 26
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

OM 1111-2 • MICROTECH UNIT CONTROLLER 2 www .DaikinApplied .com

124 IM 1152-10
 Addendum OM 1111

IntroductIon

IntroductIon

This Operation Manual covers the MicroTech® Unit Controller

for the Daikin ThinLine Fan Coils . For information on
General Use and Information
LonWorks® or BACnet® communication modules and other The MicroTech unit controller is a fan coil/cabinet unit heater
ancillary components, see: control platform used to control the fan coil/unit heater in all
modes of operation, including economizers, control valves, and
• IM 1012 — MicroTech III Fan Coil LonWorks
all components used to control conditioned space temperature .
Communication Module .
By adding a communication module, (LonWorks or BACnet)
• IM 1013 — MicroTech III Fan Coil Unit Controller BACnet network integration is possible . The controller can be used with
MS/TP Communication Module . wall sensor control only .
• IM 933 — LonWorks Plug-In Software for use with
No outside power sources may be used to operate MicroTech
MicroTech III Unit Controller - LonWorks Communication
controller . All units must be properly grounded per local code
Module .
requirements . See the Installation Manual IM 1152 for specific
• IM 1171 — Digitally Adjustable Display Sensor Installation power requirements .
and Maintenance Manual
• OM 1095 — MicroTech III The Downloading And
Configuration Procedure
• ED 15135 — MicroTech III Fan Coil Unit Controller
Protocol Information
For information on ThinLine Fan Coils and Cabinet Unit
Heaters see
• Catalog 724 — ThinLine Horizontal Fan Coils (Type
FCHC, FCHH, and FCHR)
• Catalog 725 — ThinLine Horizontal Cabinet Unit Heaters
(Type FHHC, FHHH, and FHHR)
• IM 1152 — Installation Manual Daikin ThinLine Horizontal
Fan Coils and Cabinet Unit Heaters (Type FC and FH
Horizontal Design) .

www .DaikinApplied .com 3 OM 1111-2 • MICROTECH UNIT CONTROLLER

IM 1152-10 125
Addendum OM 1111

IntroductIon

Control Inputs Fan Mode/Speed Switch

The baseboard accepts the following analog and binary control Analog input may be used to determine the position of the fan
inputs: mode and speed switch. Input DC voltages are defined as
follows: 0 .0v = Auto, 1 .0v = High, 2 .0v = Medium, 3 .0v = Low,
1 . Room Temp and Tenant Override . . . . . . . . . . . . . Analog 4 .0v = Off, 5 .0v = Switch is not present .
2 . Local Setpoint Adjust . . . . . . . . . . . . . . . . . . . . . . . Analog
3 . Fan Mode/Speed Switch . . . . . . . . . . . . . . . . . . . . Analog Entering Water Temperature (EWT)
4 . Entering Water Temperature (EWT) . . . . . . . . . . . Analog Analog input may be used to measure temperature of water
entering the hydronic coil using a 10k NTC thermistor . The
5 . Discharge Air Temperature (DAT) . . . . . . . . . . . . . Analog sensor is only required in 2-Pipe Cooling/Heating systems or
6 . Heat/Cool/Auto Mode Switch . . . . . . . . . . . . . . . . Analog Heating-only with Supplemental Electric Heat, and is optional
elsewhere .
7 . Freeze Fault Detection . . . . . . . . . . . . . . . . . . . . . . Binary
8 . Occupancy Sensor . . . . . . . . . . . . . . . . . . . . . . . . Binary Figure 1: MicroTech Baseboard
9 . Condensate Overflow . . . . . . . . . . . . . . . . . . . . . . Binary

Input Description
Room or Return Air Temp & Tenant Override
Analog input may be used to measure Room or Return Air
temperature using a 10k NTC thermistor . The same analog
input is used to sense the position of the timed override switch
when a room sensor is applied . This sensor is mandatory in
the Fan Coil/Cabinet Unit Heater units unless the input value is
provided through network communications .

Condensate Overflow
Analog input may be used to detect the presence of water in
condensate pan . While the input is analog (microOhms), the
result of the algorithm is binary (dry or wet) . If the value is
below 2 .5 microOhms, the pan is dry . If the value is above 2 .5
microOhms, the pan is wet . Ultimately the pan is considered
dry for analog inputs above 1 .8 VDC .

Local Setpoint Adjust

Analog input may be used to determine hardwired setpoint Discharge Air Temperature (DAT)
position based on a 1.5K Ω potentiometer that is mounted Analog input may be used to measure discharge air
on the room temperature sensor . Setpoint is at its minimum temperature sensor using a 10k NTC thermistor .
value at 0 Ohms (0 .0 VDC), maximum value at 1 .5K Ohms
(3 .0 VDC) . Range of input is determined by the setting of an Heat/Cool/Auto Mode Switch
equipment configuration bit. Long range input is limited by
Max and Min clamp settings . Either “Short” or “Long” range is Analog input may be used to determine the position of the
selected during the unit order and preset at the Daikin factory . heat/cool/auto mode switch. Input DC voltages are defined as
See “nciSoftJumpers” in Table 18 for specification details. follows: 0 .0v = Cool, 1 .0v = Auto, 2 .5v = Heat, 5 .0v = Switch is
not present .
• If “Short Range” is selected, the nvoSetptShift variables
are used . Freeze Fault Detection
• If “Long Range” is selected, the nvoSetpoint variable is
Binary input may be used to detect the position of a low
used .
discharge air temperature freeze fault detection switch . The
sensor part of the switch is installed in the air stream . If the
contact on the switch is open, the temperature in the air stream
is below freezing (alarm active) . If the contact on the

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MIcrotech BaseBoard

MIcrotech BaseBoard

switch is closed, the temperature in the air stream is above • Low Speed:
freezing (alarm inactive) . Must use “nciSoftJumpers” to enable This binary output is used to operate the fan at low
or disable this input . See Table 18 . Input span is 0 .0 to 3 .6 speed . If this output is energized, the fan operates at low
VDC, with a threshold of 1 .5 VDC . speed .
NOTE: Freezestat sensor should be provided from the • Medium Speed:
factory or field-supplied
This binary output is used to operate the fan at medium
Occupancy Sensor speed . If this output is energized, the fan operates at
Binary input may be used to detect the position of an medium speed .
occupancy sensor . This could be a motion detector or a time • High Speed:
clock . Open sensor contact represents occupied, closed
This binary output is used to operate the fan at high
sensor contact represents unoccupied . Network-effective
speed . If this output is energized, the fan operates at
occupancy has priority over position of this input . Input span
high speed .
is 0 .7 (unoccupied) to 5 .0 VDC (occupied), with a threshold of
2 .85 VDC .
Two-Position Damper Output
NOTE: Note: Occupancy sensor is field-supplied
Binary output may be used to open a fresh air ventilation
damper . If the output is de-energized, the damper is closed . If
Control Outputs the output is energized, the damper is open .
The MicroTech baseboard provides the following Binary
Outputs: Room Sensor Status Output
1 . Fan Low Speed Binary output may be used to energize and de-energize an
indicator located on the room sensor . See Room Sensor Status
2 . Fan Medium Speed Output Annunciation Table below .
3 . Fan High Speed
4 . Valve Output #1 Status Annunciation Tables
5 . Valve Output #2
Table 1: Room Sensor Status Output Annunciation Table
6 . Valve Output #3/Electric Heat S1
Condition * Indicator Indicator
7 . Valve Output #4 On Time (Sec) Off Time (Sec)
Alarm Active:
8 . Fresh (Outside) Air Damper – 2-Position only . Specific Alarm Determines 0 .3 0 .3
Number of Flashes (See (1 .3 Between Cycles)
9 . Room Sensor Status Output Alarms section)
Calibration or Network 3 .0 3 .0
Wink Active
Output Description
Service Test Mode 0 .0 Continually
Each binary output is either a relay with normally-open
Unoccupied Mode 0 .5 5 .5
contacts or a triac . A triac is treated like a relay with normally-
open contacts . In other words, energizing the triac is like Standby Mode 5 .5 0 .5
closing a normally-open contact . Occupied, Bypass Mode Continually 0 .0
* Annunciation conditions are listed in order of priority .

Fan Speed Outputs

Table 2: Baseboard Diagnostic LED Annunciation Table
There are three fan speed outputs on baseboard, and three
fan speed outputs on I/O expansion board . The two separate Diagnostic LED State Condition
fans operate in unison . In other words – if the low speed LED #1: On Steady Normal I/O Expansion Board SPI Communications
output on baseboard is energized, the low speed output on LED #1: Flashing Failed I/O Expansion Board SPI Communications
I/O expansion board is also energized, etc . If all three outputs LED #2: On Steady Normal Comm Module SPI Communications
are de-energized, the fan motor is off . Only a single type (low,
LED #2: Flashing Failed Comm Module SPI Communications
medium, high) of speed output shall be turned on when fan
operation is required .

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I/o expansIon Module

I/o expansIon Module

The I/O Expansion Module is an extension of the main board Input Description
and provides extra functionality to the MicroTech control
system . The MicroTech unit controller in combination with the
Outdoor(Fresh) Air Temperature (OAT)
I/O Expansion Module will be the standard control system for
ThinLine Fan Coils and Cabinet Unit Heaters . See Figure 2 . Analog input may be used to measure outdoor air temperature
using a 10k NTC thermistor .
Adding an I/O Expansion Module (with an interconnect cable)
to the main controller allows:
Dirty Air Filter
• Economizer Control
Binary input may be used to detect Dirty Filter2 condition . Dirty
• Second Fan Motor Control air filter alarm is active when the input contact opens. Must use
• Additional control inputs “nciSoftJumpers” to enable or disable this input . See Table 18
for details . Input span is 0 .0 to 3 .6 VDC, with a threshold of 1 .5
I/O Expansion Board Inputs & Outputs VDC .
2
Currently Dirty Filter input uses timer signal only .
I/O expansion Board accepts the following inputs:
1 . Outdoor Air Temperature (OAT) – analog Humidistat [future option]
2 . Dirty Air Filter – binary 1 Binary input may be used to detect humidistat position . Contact
closes when dehumidification is required. This feature is only
3 . Emergency Shutdown Detection – binary [Future option] allowed for 4-Pipe Heating & Cooling systems with modulating
4 . Humidistat – binary [Future option] valves and 2-Pipe Cooling-only systems . Input span is 0 .0 to
1
Currently Dirty Filter indication uses timer only 3 .6 VDC, with a threshold of 1 .5 VDC .

Figure 2: MicroTech I/O Expansion Module

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I/o expansIon Module

Output Description Second Fan Motor Speed Outputs

I/O Expansion Board provides the following binary Outputs: There are three fan speed outputs on baseboard, and three
fan speed outputs on I/O expansion board . The two separate
1 . Economizer Open
fans operate in unison . In other words – if the low speed
2 . Economizer Closed output on baseboard is energized, the low speed output on
3 . Fan Low Speed I/O expansion board is also energized, etc . If all three outputs
are de-energized, the fan motor is off . Only a single type (low,
4 . Fan Medium Speed medium, high) of speed output shall be turned on when fan
5 . Fan High Speed operation is required .
• Low Speed:
Economizer Control Outputs This binary output is used to operate the fan at low
I/O expansion board binary outputs 1 and 2 are may be used speed . If this output is energized, the fan operates at low
for economizer control . Output #1 drives the economizer speed .
toward the open position . Output #2 drives the economizer • Medium Speed:
toward the closed position .
This binary output is used to operate the fan at medium
speed . If this output is energized, the fan operates at
Emergency Shutdown [future option] medium speed .
Binary input may be used to detect an emergency shutdown
• High Speed:
condition . Shutdown occurs when the input contact opens .
Must use “nciSoftJumpers” to enable or disable this input . This binary output is used to operate the fan at high
See Table 18 for details . Input span is 0 .0 to 3 .6 VDC, with a speed . If this output is energized, the fan operates at
threshold of 1 .5 VDC . high speed .

Table 3: I/O Expansion Board Diagnostic LED

Annunciation Table

Condition * LED LED

On Time (Sec) Off Time (Sec)
SPI Communications Receive 0 .5 0 .5
(RX) Fail
SPI Communications Transmit
(TX) Fail (From Baseboard) 2 .5 2 .5

Normal SPI Communications Continually 0 .0

* Annunciation conditions are listed in order of priority .

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control Boards terMInals and connectors descrIptIons

control Boards terMInals and connectors descrIptIons

Figure 3: MicroTech Unit Controller & I/O Expansion Module Connectors Descriptions

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control Boards terMInals and connectors descrIptIons

MicroTech Unit Controller

Table 4: MicroTech Unit Controller Terminals & Descriptions

Baseboard Connector – Terminal # Silk Screen Label Description
H1-1 24VAC 24VAC Power Input
H1-2 GND Ground
H2-4 BO3 Fan High Speed Output
H2-3 BO2 Fan Medium Speed Output
H2-2 BO1 Fan Low Speed Output
H2-1 NEUTRAL Fan Neutral
H3-1 BO4 Valve Output 1
H3-2 BO5 Valve Output 2
H3-3 COM Ground
H3-4 BO6 Valve Output 3 or Electric Heat Stage 1
H3-5 BO7 Valve Output 4
H3-6 COM Ground
H4-1 BO8 Damper Open
H4-2 COM Ground
H5-1 24VAC Power to I/O Board
H5-2 Ground to I/O Board
H5-3 +5V Power to I/O Board
H5-4 Ground to I/O Board
H5-5 +12V Power to I/O Board
I/O BOARD INTERFACE
H5-6 Ground to I/O Board
H5-7 SPI_CE1_1 to I/O Board
H5-8 SPI_OUT_1 to I/O Board
H5-9 SPI_IN_1 to I/O Board
H5-10 SPI_CLK_1 to I/O Board
H6-1 AI1 Room Temperature
H6-2 AI3 SetPoint Adjust
H6-3 AI4 Fan Mode Switch
H6-4 AI7 Heat/Cool/Auto Switch
H6-5 BO9 Room Sensor LED
H6-6 COM Ground
H7-1 BI1 Freeze Fault Detection
H7-2 24VAC 24VAC
H8-1 AI5 Entering Water Temperature
H8-2 COM Ground
H8-3 AI6 Discharge Air Temperature
H8-4 COM Ground
B1 AI2 Condensate Overflow
TB1-1 AI1 Room Temperature
TB1-2 AI3 SetPoint Adjust
TB1-3 A14 Fan Mode Switch
TB1-4 AI7 Heat/Cool/Auto Switch
TB1-5 BO9 Room Sensor LED
TB1-6 COM Ground
TB2-1 BI2 Unoccupied input
TB2-2 24VAC 24VAC
LINE1 LINE1 Line Voltage/ECM Terminal
LINE2(N) LINE2(N) Neutral Terminal

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control Boards terMInals and connectors descrIptIons

Figure 4: MicroTech III Fan Coil I/O Expansion Board Connector Layout (not to scale)

I/O Expansion Module

Table 5: I/O Expansion Module Connectors/Terminals
IO Exp . Module Connector – Terminal # Silk Screen Label Description
H1-1 SPI_CLK_1 to I/O Board
H1-2 SPI_OUT_1 to I/O Board
H1-3 SPI_IN_1 to I/O Board
H1-4 SPI_CE1_1 to I/O Board
H1-5 Ground to I/O Board
UNIT CONTROLLER INTERFACE
H1-6 +12V Power to I/O Board
H1-7 Ground to I/O Board
H1-8 +5V Power to I/O Board
H1-9 Ground to I/O Board
H1-10 24VAC Power to I/O Board
H2-1 BO1 Economizer Open output
H2-2 BO2 Economizer Closed output
H2-3 COM Ground
H3-4 BO5 Fan High Speed
H3-3 BO4 Fan Medium Speed
H3-2 BO3 Fan Low Speed
H3-1 NEUTRAL Fan Neutral
H4-1, TB4-1 AI1 Outdoor Air Temp
H4-2, TB4-2 COM Ground
TB2-1 BI1 Emergency Shutdown signal
TB2-2 24VAC Emergency Shutdown 24VAC
TB3-1 BI3 Humidistat signal
TB3-2 24VAC Humidistat 24VAC
H5-1 BI2 Dirty Air filter signal
H5-2 24VAC Dirty Air Filter 24VAC

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control Boards terMInals and connectors descrIptIons

Figure 5: BACnet Communication Module

BACnet Communication Module

Table 6: BACnet Communication Module Connectors/Terminals
BACnet Module Connector – Terminal # Silk Screen Label Description
P3 – 1 Network Signal +
P3 – 2 Network Signal –
P3
P3 – 3 REF
P3 – 4 Shield

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control Boards terMInals and connectors descrIptIons

Figure 6: LonWorks Communication Module

lonWorks Communication Module

Table 7: LON Communication Module Connectors/Terminals
lonWorks Module Connector – Terminal # Silk Screen Label Description
TB1 – 1 Network Signal A
TB1 – 2 TB1 Network Signal B
TB1 – 3 No Connection

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Fan coIl/caBInet unIt heater unIt control

Fan coIl/caBInet unIt heater unIt control

The FCU primary operation depends on eight unit states of Possible FCU Machine States include:
operation . When power is applied or controller is reset, the • Off Alarm
unit controller will go through a boot-up sequence, then go to
the “Off” unit state . Refer to Table 8 and Table 9 for the state • Off
of every fan coil component in the Occupied and Unoccupied • Start (Actuator calibration occurs if applicable)
(Standby) Modes . • Fan Only (Fan is enabled, however may not be on)
• Heating
• Economizer
• Cooling (fan coils only)
• Dehumid [future option for Fan coils only: 2-Pipe
in Cooling mode or 4-Pipe Modulating Heat & Cool
Systems]

Fan Coil/Cabinet Unit Heater Control Output Tables

Table 8: UNOCCUPIED or STANDBY
(Economizer State & Dehumid State [future option] not allowed)
Dehumid
Off Alarm Off Start Fan Only Heating Economizer Cooling [future option]
Fan Off Off Off Off Highest N/A Highest N/A
Cooling Valve Note1 Closed2 Closed Closed Closed N/A Open N/A
Heating Valve Note 1 Closed2 Closed Closed Open N/A Closed N/A
Electric Heat Off Off Off Off On N/A Off N/A
Damper Closed Closed Closed Closed Closed N/A Closed N/A
Economizer Closed Unchanged Closed Closed Closed N/A Closed N/A

Table 9: OCCUPIED or BYPASS

(Economizer State allowed if enabled by Equipment Configuration)

Off Alarm Off Start Fan Only Heating Economizer Cooling Dehumid
[future option]
Fan Off Off Off Controlled Controlled Controlled Controlled Controlled
Cooling Valve Note1 Closed2 Closed Closed Closed Closed Controlled Open
Heating Valve Note1 Closed2 Closed Closed Controlled Closed Closed Controlled
Electric Heat Off Off Off Off On Off Off Off
Damper Closed Closed Closed Controlled3 Open Open Open Open

Economizer Closed Unchanged Closed Closed, Minimum Controlled Open, Open,

Minimum4 Min to Open Minimum5 Minimum5
1
Dependant on specific alarm, see “Alarm: Control & Reset Table”.
2
Two position valves closed, modulating valves are unchanged .
3
Damper open if fan is on, closed if fan is off
4
Economizer closed if fan is off, otherwise at minimum position per fan speed
5
Economizer open if available to cool, otherwise at min position per fan speed

Table 10: Fixed Timing Parameters Default Values

Fixed Timing Parameter Normal
Condensate Overflow Alarm Activation Delay 60 sec
Dehumidification Minimum Off Timer 180 sec
Fan Runtime After Electric Heat Turnoff 30 sec
Fan Speed Change Timer 0 .2 sec
Room Temperature Sensor Failure Delay When Analog Input Is Shorted 4 min
Valve & Economizer Calibration Interval 24 hrs

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Table 11: Configuration Property Default Values

Configuration Property Usable Range Default Value Description

nciBypassTime 0, 30 to 120 Min 120 m Amount of time controller operates is in the bypass occupancy mode when the user
activates the timed override function .
nciSetpoints:Occ_cool 50 to 95 °F 75 °F Occupied operating mode cooling setpoint .
nciSetpoints:Stby_cool 50 to 95 °F 77 °F Standby operating mode cooling setpoint .
nciSetpoints:Unoc_cool 50 to 95 °F 85 °F Unoccupied operating mode cooling setpoint .
nciSetpoints:Occ_heat 50 to 95 °F 70 °F Occupied operating mode heating setpoint .
nciSetpoints:Stby_heat 50 to 95 °F 66 °F Standby operating mode heating setpoint .
nciSetpoints:Unoc_heat 50 to 95 °F 60 °F Unoccupied operating mode heating setpoint .
Differential between the effective on and off setpoints when operating in the occupied
nciOccDiff 1 to 5 °F 1 °F mode .

nciUnoccDiff 2 to 10 °F 2 °F Differential between the effective on and off setpoints when operating in the unoccupied
mode .
nciEwtFlowTimer 60 to 600 Sec 120 s Length of time flow is allowed after opening a hydronic valve before sampling the EWT.
nciEwtSampleTmr 0, 20 to 120 Min 120 m Length of time between EWT sampling processes .
nciFanMinOffTmr 120 to 1200 Sec 180 s Minimum length of time the fan must remain off after it initially turns off .
nciFanMinOnTmr 120 to 1200 Sec 180 s Minimum length of time the fan must remain running after it initially turns on .
nciFltrChangeHrs 0, 360 to 4320 Hr 1440 hr Length of time the fan operates before a dirty air filter alarm is generated.

nciLocSptEnable Disable, Enable Enable Variable to enable or disable the use of the local setpoint adjustment input from the room
sensor .
nciSptAdjMax 55 to 95 °F 95 °F Long range setpoint adjust input maximum value .
nciSptAdjMin 55 to 95 °F 55 °F Long range setpoint adjust input minimum value .
Hydronic Heating Control
EWT must be warmer than the room temperature at least by this amount for hydronic
nciHeatEnDiff 2 to 10 °F 5 °F
heating to be allowed in two pipe systems .
nciHeatIntStgTmr 120 to 1200 Sec 300 s Inter stage time used between automatic heating capacity fan speed changes .
nciHeatKp 5 to 160 % 25 % Hydronic heating valve PI control loop proportional gain setting .
nciHeatKi 0 to 1200 Sec 20 s Hydronic heating valve PI control loop integral setting .
nciHeatDB 3 to 100 % 3% Hydronic heating valve actuator positioning deadband .
nciHeatVlvStroke 15 to 600 Sec 180 s Hydronic heating valve actuator full travel time .
Hydronic Cooling Control
EWT must be colder than the room temperature at least by this amount for hydronic cool-
nciCoolEnDiff 2 to 10 °F 5 °F ing to be allowed in two pipe systems .
nciCoolIntStgTmr 120 to 1200 Sec 300 s Inter stage time used between automatic cooling capacity fan speed changes .
nciCoolKp 5 to 160 % 40 % Hydronic cooling valve PI control loop proportional gain setting .
nciCoolKi 0 to 1200 Sec 30 s Hydronic cooling valve PI control loop integral setting .
nciCoolDB 3 to 100 % 3% Hydronic cooling valve actuator positioning deadband .
nciCoolVlvStroke 15 to 600 Sec 180 s Hydronic cooling valve actuator full travel time .
Economizer Cooling Control
nciDaSptKp 5 to 160 % 40 % Discharge air temperature setpoint PI control loop proportional gain setting .
nciDaSptKi 0 to 1200 Sec 20 s Discharge air temperature setpoint PI control loop integral setting .
Economizer PI control block setpoint maximum value when the discharge air PI control
nciMaxDaSpt 50 to 80 °F 75 °F loop output is at 0% .

nciMinDaSpt 50 to 80 °F 55 °F Economizer PI control block setpoint minimum value when the discharge air PI control
loop output is at 100% .
Outdoor air temperature must be colder than the room temperature at least by this
nciEconOaEnDiff 1 to 12 °F 2 °F amount for Economizer cooling to be allowed .
nciEconOaEnSpt 40 to 80 °F 50 °F Outdoor air temperature must be above this setpoint to allow Economizer cooling .
nciEconKp 5 to 160 % 90 % Economizer positioning PI control loop proportional gain setting .
nciEconKi 0 to 1200 Sec 10 s Economizer positioning PI control loop integral setting .
nciEconDB 3 to 100 % 3% Economizer actuator positioning deadband setting .
nciEconStroke 15 to 600 Sec 66 s Economizer actuator full travel time .
nciEconLowMin 0 to 100 % 10 % Economizer minimum position when the fan is operating at low speed .
nciEconMedMin 0 to 100 % 10 % Economizer minimum position when the fan is operating at medium speed .
nciEconHighMin 0 to 100 % 10 % Economizer minimum position when the fan is operating at high speed .
Note: Reference the ED15135 protocol information document for more details on configuration properties and other network variables.

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Fan coIl/caBInet unIt heater unIt control

Operating Modes Occupied Capacity Control

Occupied Operation
Start-up
The board will be in Occupied mode if the unoccupied terminal
The unit will not operate until all the inputs and safety controls
(BI2) is not shorted to ground . Heating and cooling will not
are checked for normal conditions .
operate until the fan is running .

General Sequences of Operation Cooling

If the room temperature is above the Occupied Cooling On
Fan Operation Setpoint in the fan Auto Cycling mode, the fan will start before
The Table 12 describes fan operation in the various controller the cooling state is entered . After the fan is on, the cooling
modes . Fan operation depends on the occupied/unoccupied valve will open (two position valves) or a proportional-integral
status of the controller, the position of the room sensor control algorithm will modulate the cooling valve open in an
mounted (or unit mounted) fan speed switch, and the capacity attempt to maintain the room temperature .
requested from the control algorithm .
If the temperature remains above the Occupied Cooling On
Setpoint for longer than a cooling stage time when the cooling
Table 12: Fan Mode valve is full open and the fan is on Low speed (auto fan mode),
Fan Mode Occupied Unoccupied the fan will stage to Medium speed in an attempt to satisfy the
Off Off Off load . If the temperature remains above the Occupied Cooling
Fan runs on low speed On Setpoint for longer than a cooling stage time when the
Low speed, continuous when heating or cooling cooling valve is full open and the fan is on Medium speed (auto
Low
operation capacity is required . Fan fan mode), the fan will stage to High speed in an attempt to
is off otherwise .
satisfy the load .
Fan runs on medium
speed when heating If the temperature is below the Cooling On Setpoint and the
Medium speed,
Medium
continuous operation
or cooling capacity is cooling Interstage timer has expired, the fan will stage from
required . Fan is off High to Medium speed . If the temperature is below the Cooling
otherwise .
On Setpoint and the cooling Interstage timer has expired, the
Fan runs on high speed
High speed, continuous when heating or cooling
fan will stage from Medium to Low speed . If the temperature
High remains below the Cooling Off Setpoint for longer than the
operation capacity is required . Fan
is off otherwise . cooling stage time and the fan is at its lowest fan speed ,
Fan runs continuously Fan runs on high speed cooling valve will close and the unit will enter the “Fan Only”
on low, medium or high when heating or cooling state . When the Fan Minimum On timer has expired, the fan
Auto – Continuous
depending on capacity capacity is required . Fan
required . is off otherwise .
will turn off if fan cycling is enabled .
When no capacity is
required, fan is off and Heating
Fan runs on high speed
damper is closed . When
Auto – Cycling capacity is required, fan
when heating or cooling If the room temperature is below the Occupied Heating On
capacity is required . Fan Setpoint in the fan auto cycling mode, the fan will start before
runs on low, medium
is off otherwise .
or high depending on the heating state is entered . After the fan is on, the heating
capacity required . valve will open (two position valves), the electric heat will
be enabled, or a proportional-integral control algorithm will
Occupied/Unoccupied Operation modulate the heating valve open in an attempt to maintain the
The occupied/unoccupied operation of the unit is either room temperature .
controlled from the occupied/unoccupied binary input or over If the temperature remains below the Occupied Heating On
the communications network . When in the occupied mode, Setpoint for longer than a heating stage time when the heating
the controller will control to the occupied heating and cooling valve is full open and the fan is on Low speed (auto fan mode),
setpoints . In the unoccupied mode, unoccupied heating and the fan will stage to Medium speed in an attempt to satisfy the
cooling setpoints will be used . Fan operation is as described load . If the temperature remains below the Occupied Heating
above . Heating and cooling operation will not be enabled On Setpoint for longer than a heating stage time when the
until the fan is running . When the occupied/unoccupied state heating valve is full open and the fan is on Medium speed
of the controller is being controlled over the communications (auto fan mode), the fan will stage to High speed in an attempt
interface, the local binary input will be ignored . to satisfy the load .

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Fan coIl/caBInet unIt heater unIt control

If the temperature is above the Heating On Setpoint and 4-Pipe Modulating Heating & Cooling System:
the heating Interstage timer has expired, the fan will stage • Fan is on at speed determined by capacity and effective
from High to Medium speed . If the temperature is above fan mode/speed .
the Heating On setpoint and the heating Interstage timer
has expired, the fan will stage from Medium to Low speed . If • Heating valve is controlled .
the temperature remains above the Heating Off Setpoint for
longer than the heating stage time and the fan is at its lowest General Operation
fan speed the heating valve will close, electric heat will shut Unit status will change to the “Fan Only” state if all of the
off, and the unit will enter the Fan Only state . When the Fan following conditions exist:
Minimum On and the Fan On After Electric Heat timers have
• Dehumidification isn’t required or is not available, heating
expired, the fan will turn off if fan cycling is enabled .
or cooling capacity becomes required .
• The cooling valve has been driven closed .
Unoccupied Capacity Control • The 4-pipe system heating valve has been driven closed .
• Fan is running at the lowest possible speed based on:
Cooling
selected occupancy and fan mode/speed switch setting .
When the room temperature rises above the Unoccupied
Cooling On Setpoint, the fan will start in High speed and the Dehumid State Notes
cooling valve will fully open in an attempt to maintain room
• For dehumidification availability definition, see
temperature. When the temperature is satisfied (temperature
“Miscellaneous Control Definitions section”.
drops below the Unoccupied Cooling On Setpoint minus the
unoccupied differential) and the cooling Interstage timer has • When leaving “Dehumid” state, the 180 second fixed
expired, the valve will first close and then the fan will shut off. “dehumidification minimum off” timer will be started. This
prevents returning back to the “Dehumid” state too soon .
Heating
Total Electric Heat mode (2-pipe Cooling
When the room temperature falls below the Unoccupied
Heating On Setpoint, the fan will start in High speed and systems only)
the heating valve will fully open (or the electric heat will On an initial call for heating:
be enabled) in an attempt to maintain room temperature .
1 . The fan will start at Low speed in “Fan Only” state
When the temperature is satisfied (temperature rises above
the Unoccupied Heating On Setpoint plus the unoccupied 2 . Unit enters Heating state, electric heat is energized, and
differential) and the heating Interstage timer has expired, the heating Interstage timer is started
valve will first close, electric heat will shut off and then the fan 3 . If Heating Interstage Countdown Timer has expired and
will shut off . room temperature is below the Heating On Setpoint, fan
speed will be changed from Low to Medium, and Heating
Dehumidification Operation [future option] Interstage Countdown Timer is started again .
This fan coil state is allowed for: 2-Pipe in Cooling only or 4 . If Heating Interstage Countdown Timer has expired and
4-Pipe Modulating Heating & Cooling systems; and controller room temperature is below the Heating On Setpoint,
must be in the occupied or bypass mode . Modulating Cooling fan speed will be changed from Medium to High, and
valve is fully open . Electric heat is off . Fresh Air Damper (if Heating Interstage Countdown Timer is started again .
available) is open . Economizer, if available, will be fully open, Once room temperature reaches the Heating On Setpoint
otherwise at minimum position based on fan speed . the fan will be run at Medium and Low speed with Interstage
Countdown Timer started each time the fan speed is changed .
2-Pipe Cooling Only System: When the room setpoint conditions are satisfied, electric heat
• Fan is on at lowest available speed . will be de-energized and the fan will continue to operate at its
“fan only” setting when enabled, for continuous fan operation .
• Heating valve is non-existent .
If fan cycling is enabled, the fan will turn off after 30 seconds
• Dehumidification is only allowed when the effective space once room setpoint conditions are satisfied.
temperature is greater than the effective heating on
setpoint, and becomes disabled when space temperature
drops below the effective heating on setpoint minus a 2°F
fixed differential.

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Supplemental (Intermediate) Electric Heat mode [for

2-pipe Cooling/Heating systems only] CAUTION
On an initial call for heating, the controller will open the Adjusting PI parameters can cause erratic unit
water valve for Flow Timer” to check for appropriate entering operation, and potentially damage the equipment .
water temperature . Once the water valve is 100% open, PI control parameters must only be adjusted by trained
a 120-second (default setting) flow timer will start and flow personnel having a complete understanding of how
allowed . When timer has expired and if water temperature is these parameters affect system operation . Generally
colder than required for hydronic heating the control valve will these parameters do not need to be adjusted from the
fully closed, fan started and electric heater energized . The factory settings .
rest of the operation will run as described in paragraph Total
Electric heat above exclusively using electric heat (EWT is not
sampled for systems with Total Electric Heat) . Proportional Gain
The proportional gain, or proportional action, causes the
Proportional–Integral Control Parameters controlled output to change in proportion to the magnitude of
the present error amount . Error is the difference between the
Associated with each Proportional-Integral (PI) control loop sensors present value and the set point . When the Kp setting
are three adjustable parameters: Proportional Gain (Kp), is too low, the process variable (PV) response will change too
Integral Time (Ki), and Deadband (DB) . When the fan coil unit slowly . When the Kp setting is too high, the process variable
(FCU) is properly sized for the space, the factory settings for response will excessively overshoot and possibly oscillate
these parameters will provide the best control action for all the around the setpoint (SP) . If faster system response is desired
various operating scenarios . increase the proportional gain (Kp) setting . Use caution not
to become too aggressive with the proportional gain setting to
PI Control Algorithm avoid causing system instability .
The PI control algorithm calculates the desired actuator output,
and ranges from 0 to 100% . Integral Time
The integral time, or integral action, accumulates the error
Definitions: amounts and causes the controlled output to approach the set
• Error: Value is calculated one of two ways depending on point over time in an attempt to eliminate any system offset .
the PI blocks fixed action type. The smaller the integral (Ki) setting, the more the integral will
Direct Acting Block: Error = (PV – SP) affect the process under control . When the Ki setting is too
low, the process variable (PV) will oscillate around the setpoint .
Reverse Acting Block: Error = (SP – PV) When the Ki setting is too high, the process variable will never
• Process Variable (PV): Measured analog input reading . reach the setpoint .
• Sample Time: Scan rate of the PI control blocks, which is
an internal fixed value of 10 seconds. Deadband
• Sum of Errors: Summation, or total, of all past errors . The deadband parameter serves two main purposes . First
deadband prevents the actuator from constantly hunting or
Output Formula: overcorrecting, and secondly ensures the actuator physically
moves every time a new positioning command is given .
PI Output = (Kp × Error) + ((Sample Time × Sum of Past
Deadband will prevent small output changes from modifying
Errors) / Ki)
the actuator position. When the deadband configuration
If field problems arise, first ensure these parameters are set property is set to 3%, the PI control output adjustment must
back to the factory default settings . If adjustment is required, exceed plus or minus 1 .5%, or the actuator position will not be
only make small adjustments to one parameter at a time . After changed .
each adjustment, induce an instantaneous error into the PI
algorithm and allow enough time for the system to stabilize
before making any further modifications. If you do not have the
means to graph the process variable performance, record the
actual measured value and set point for the duration of the test
and then plot the results using a spreadsheet to determine the
correct action to take .

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PI Control Blocks Table 15: PI Control Block #3 – Economizer Discharge Air

Setpoint Control
The fan coil unit contains four PI control loop blocks . The PI
control blocks are defined as follows: Inputs / Outputs Interpretation
Polarity Type: Direct Acting (Not Error is defined as: (Room Temp
1 . Modulating Hydronic Heating Valve Adjustable) minus Effective Cool SP)
2 . Modulating Hydronic Cooling Valve SP: Effective Cooling Setpoint The desired cooling setpoint input .

PV: nvoSpaceTemp (AV-22) Room temperature is used as the

3 . Economizer Discharge Air Temperature (DAT) Setpoint process variable input .
KP: nciDASptKp (Loop3:Proportional_ Proportional gain used in the PI
4 . Economizer Position Constant) control algorithm .
The following is a brief summary of the fan coil PI control KI: nciDASptKi (Loop3:Integral_ Integral time used in the PI control
Constant) algorithm .
blocks and their associated support functions . Applicable Output: nvoDASptOut
LonWorks network variables are listed first, along with their (Loop3:Present_Value) Economizer position output command .

BACnet equivalent objects . Refer to the ED15135 protocol Translated DA temperature SP that is
Translator: nciMaxDaSpt (AV-11) sent to PI block #4 when the PI output
information document for more details pertaining to the fan coil is at 0% .
network variables . Translated DA temperature SP that is
Translator: nciMinDaSpt (AV-12) sent to PI block #4 when the PI output
is at 100% .
Table 13: PI Control Block #1 – Modulating Hydronic
Heating Valve Control Table 16: PI Control Block #4 – Economizer Position
Inputs / Outputs Interpretation Control
Polarity Type: Reverse Acting (Not Error is defined as: (Effective Heat SP Inputs / Outputs Interpretation
Adjustable) minus Room Temp)
Polarity Type: Direct Acting (Not Error is defined as: (DAT minus
SP: Effective Heating Setpoint The desired heating setpoint input . Adjustable) Discharge Air SP)
PV: nvoSpaceTemp (AV-22) Room temperature is used as the The desired DAT setpoint input . The
process variable input . SP: Discharge Air SP from PI Control
Block #3 Output PI block #3 output is translated into a
KP: nciHeatKp (Loop1:Proportional_ Proportional gain used in the PI discharge air temperature SP value .
Constant) control algorithm . Discharge air temperature is used as
PV: nvoDischAirTemp (AI-4) the process variable input .
KI: nciHeatKi (Loop1:Integral_ Integral time used in the PI control
Constant) algorithm . KP: nciDASptKp (Loop4:Proportional_ Proportional gain used in the PI
Output: nvoHeatVlvOut Heating valve position output Constant) control algorithm .
(Loop1:Present_Value) command . KI: nciDASptKi (Loop4:Integral_ Integral time used in the PI control
Deadband used to determine if the PI Constant) algorithm .
DB: nciHeatDB (AV-29) output is applied to the heating valve Output: nvoEconOut (Loop4:Present_
positioning control . Economizer position output command .
Value)
Deadband used to determine if the PI
Table 14: PI Control Block #2 – Modulating Hydronic DB: nciEconDB (AV-18) output is applied to the Economizer
positioning control .
Cooling Valve Control
Inputs / Outputs Interpretation
Polarity Type: Direct Acting (Not Error is defined as: (Room Temp
Adjustable) minus Effective Cool SP)
SP: Effective Cooling Setpoint The desired cooling setpoint input .

PV: nvoSpaceTemp (AV-22) Room temperature is used as the

process variable input .
KP: nciCoolKp (Loop2:Proportional_ Proportional gain used in the PI
Constant) control algorithm .
KI: nciCoolKi (Loop2:Integral_ Integral time used in the PI control
Constant) algorithm .
Output: nvoCoolVlvOut Cooling valve position output
(Loop2:Present_Value) command .
Deadband used to determine if the PI
DB: nciCoolDB (AV-9) output is applied to the cooling valve
positioning control .

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Tuning the PI Blocks 10 . Adjust Ki based on the following graph::

If the temperature control behavior of the FCU is poor, it may
be necessary to tune the PI control blocks of the cooling valve,
heating valve, or economizer position . When tuning the control
blocks, it is highly recommended that you follow the below
procedure . Failure to do so may result in increased tuning time,
and sub-par performance .
1 . Zero out the Ki setting .
2 . Choose a starting point for Kp
3 . Introduce a step change to the room setpoint .
4 . Observe FCU performance and temperature control
5 . Adjust Kp based on the following graph: 11 . Repeat steps 8-10 until the FCU temperature control
is acceptable . There should be no offset error and no
temperature oscillations when the loops are fully and
correctly tuned .
NOTE: The PI blocks controlling the economizer behavior (PI
Control Block #3 & PI Control Block #4) are used in a
‘cascade’ arrangement, meaning the output of block
#3 directly affects the behavior and output of block
#4 . If changes to the behavior of these blocks are
needed, then both blocks should be tuned, to avoid
negatively affecting the performance by just changing
one of the control blocks . Block # 4 should be tuned
first, followed by block #3. In addition, the PI control
for the economizer behavior may be affected by
the minimum damper position, or the minimum or
maximum setpoint outputs (nciMaxDaSpt (AV-11)
6 . Repeat steps 3-5 until the temperature control matches and nciMinDaSpt (AV-12)) . If erratic temperature
the acceptable Kp behavior in the above graph . Behavior control behavior is exhibited, it should be investigated
whether the PI block or these other settings are
should be somewhere between the two “Kp OK” system
negatively affecting the performance .
responses detailed above . Please note that there may be
an offset error after the Kp value is tuned . This is OK, as
the Ki variable will eliminate the offset error .
7 . While keeping Kp constant, choose a starting value for Ki
8 . Introduce a step change to the room setpoint .
9 . Observe FCU performance and temperature control

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alarMs

alarMs

Alarm Control Modes

• Display Only: Full control is maintained, alarm is for
display purposes only .
• Modified: Normal unit control is slightly modified by this
type of alarm .
• Shutdown #1: Fan & electric heat immediately turned off;
damper & economizer closed; valves are unchanged .
• Shutdown #2: Fan & electric heat immediately turned off;
damper & economizer closed; all valve types closed .
• Shutdown #3: Fan & electric heat immediately turned
off; damper & economizer closed; previous control mode
valve type is opened .

Table 17: Alarm Control & Reset Table

Room Sensor LED Alarm Definition Control Type Auto Recover Tenant Override Button Remote Clear Alarm
Pulses Reset

2 Invalid Equipment Shutdown #1 No No No

Configuration
3 Emergency Shutdown Shutdown #2 Yes No No
4 Freeze Fault Detection Shutdown #3 No Yes Yes
Entering Water Temp
5 Sensor Fail (EWT Shutdown #2 No No Yes
Sampling Systems)
6 Room Temp Sensor Fail Shutdown #2 No No Yes
IO Expansion
7 Communications Fail (IO Shutdown #2 Yes No No
Exp Board Selected)
Condensate Overflow
8 (Econ, Cool, & Dehumid Shutdown #2 Yes1 No Yes
Modes Only) (Fixed 60s
Delay)
Outdoor Air Temp
9 Sensor Fail (Economizer Modified: Disable No No Yes
Economizer
Selected)
Discharge Air Temp Modified: Disable
10 Sensor Fail (Economizer Economizer No No Yes
Selected)

11 Dirty Air Filter (currently Display Only No Yes Yes

based on settable timer)2
Serial EEPROM
12 Corrupted Display Only No No No

1) Auto recover is subject to intelligent alarm reset

2) Timer is user-adjustable through network . Setting timer to 0 (zero) disables the alarm . Refer to ED 15135 for more details Alarm conditions are listed
in order of priority .

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MIscellaneous control deFInItIons

MIscellaneous control deFInItIons

Heating Capacity Required Dehumidification Availability

Heating capacity is considered “required” when Effective Dehumidification is considered available if all of the following
Space Temperature (nvoSpaceTemp) goes below calculated conditions exist:
effective heating on setpoint; then becomes “not required”
• Equipment configuration software jumper
when the temperature goes above calculated effective heating (nciSoftJumpers) states that a 2-Pipe hydronic cooling
off setpoint . only without electric heat; or 4-Pipe hydronic modulating
heating and cooling system is selected in the fan coil unit .
Cooling Capacity Required • For 2-Pipe Cooling only systems the Effective Space
Cooling capacity is considered “required” when Effective Temperature (nvoSpaceTemp) must be above the
Space Temperature (nvoSpaceTemp) goes above calculated Effective Heating On setpoint .
effective cooling on setpoint; then becomes “not required” • Remote application mode (nviApplicMode) is set to
when the temperature goes below calculated effective cooling “Auto”, “Dehumid”, or “Null” .
off setpoint . Economizer state, if available, has priority over • Local Heat/Cool/Auto mode switch (nvoHeatCoolAuto) is
cooling state . set to “Auto” or “Cool” .
• I/O expansion board communications is not failed .
Dehumidification Required • Effective occupancy (nvoEffectOccup) is occupied or
Dehumidification is considered “required” when the humidistat bypass mode .
binary input is active, and no heating or cooling capacities are • The fixed “dehumidification minimum off” timer has
required . Also in 2-Pipe cooling only systems, the effective expired .
space temperature (nvoSpaceTemp) must be greater than the • Condensate overflow alarm is not active.
effective heating on setpoint for dehumidification to be allowed
Economizer Availability
Fan Availability Economizer is considered available if all of the following
Fan is considered available if all of the following conditions conditions exist:
exist:
• Equipment configuration software jumper
• Equipment configuration software jumper (nciSoftJumpers) states economizer is present in the fan
(nciSoftJumpers) has selected a valid fan speed type . coil unit .
• Remote application mode (nviApplicMode) is not set to • Remote application mode (nviApplicMode) is set to
“Off” . “Auto”, “Economy”, or “Null” .
• Local hardwired fan mode/speed switch • Local Heat/Cool/Auto mode switch (nvoHeatCoolAuto) is
(nvoFanModeSpdSw) is not set to “Off” . set to “Auto” or “Cool” .
• The “fan minimum off” timer has expired . • Effective occupancy (nvoEffectOccup) is occupied or
bypass mode .
• Difference between indoor and outdoor air temperature
is greater than economizer indoor to outdoor air control
enable differential (nciEconIOAEnDiff) setting for ability to
cool. Prevents using outdoor air that’s too hot.
• Outdoor air temperature is greater than economizer
outdoor air temperature control enable (nciEconOAEn)
setting. Prevents using outdoor air that’s too cold.
• I/O expansion board communications failure alarm is not
active .
• Condensate overflow alarm is not active.
• Outdoor air temperature sensor failure alarm is not active .
• Discharge air temperature sensor failure alarm is not
active .

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MIscellaneous control deFInItIons

MIscellaneous control deFInItIons

Electric Heating Availability Hydronic Cooling Availability

Electric heating is considered available if all of the following Hydronic cooling is considered available if all of the following
conditions exist: conditions exist:
• Equipment configuration software jumper • Equipment configuration software jumper
(nciSoftJumpers) states electric heating is selected in the (nciSoftJumpers) states hydronic cooling is selected in
fan coil unit . the fan coil unit .
• Remote application mode (nviApplicMode) is set to • Remote application mode (nviApplicMode) is set to
“Auto”, “Heat”, or “Null” . “Auto”, “Cool”, or “Null” .
• Local Heat/Cool/Auto mode switch (nvoHeatCoolAuto) is • Local Heat/Cool/Auto mode switch (nvoHeatCoolAuto) is
set to “Auto” or “Heat” . set to “Auto” or “Cool” .
• Condensate overflow alarm is not active.
Hydronic Heating Availability
Hydronic heating is considered available if all of the following
conditions exist:
• Equipment configuration software jumper
(nciSoftJumpers) states hydronic heating is selected in
the fan coil unit .
• Remote application mode (nviApplicMode) is set to
“Auto”, “Heat”, or “Null” .
• Local Heat/Cool/Auto mode switch (nvoHeatCoolAuto) is
set to “Auto” or “Heat” .

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4 . Holding board in grounded hand, install board in unit .

Replacing a MicroTech Circuit Board
5 . Insert faulty board in empty static bag for return .
WARNING NOTE: The new board needs to have correct equipment
The MicroTech circuit board incorporates static configuration performed at the factory otherwise
sensitive de-vices . A static charge from touching the it will not operate properly . Contact Daikin factory
device can damage the electronic components . To help representative for directions .
prevent damage during service, use static discharge
wrist straps . Static discharge wrist straps are grounded Equipment Configuration Settings
to the fan coil chassis through a 1 MOhm resistor .
Configuration property variable are used to determine the
equipment configuration; which are read from the serial
Replacement part is shipped from Daikin with correct EEPROM when the controller initially boots . The FCU control
configuration preset at the factory. option bits are then initialized based on the “nciSoftJumpers”
1 . Connect grounding wrist strap to unit . values read from the serial EEPROM . The controller must be
rebooted after modifying the software configuration settings
2 . Remove faulty board and place on static protected
before they will be used in controlling the FCU . Setting is
surface .
considered: open when bit is zero, and closed when bit is one .
3 . Remove replacement board from static protected bag .
Do not touch circuit board; hold by edges .

Table 18: Equipment Configuration Setting Options

Function Bit/Binary Setting Model/Feature
0 = Normal Operation
Service Test Mode Byte 1: b0
1 = Service Test Mode
0 = Continuous Fan
Continuous/Cycling Fan Byte 1: b1
1 = Cycling Fan
0 = Short Range (-5 to +5 °F)
Setpoint Adjust – Temperature Range Byte 1: b2
1 = Long Range (55 to 95 °F)
0 = No IO Expansion Board Present
IO Expansion Board Selection Byte 1: b3
1 = Enable IO Expansion Board
0 = No Economizer Present
Economizer Selection Byte 1: b4
1 = Enable Economizer Use
0 = Normally Open Heating Valve
N .O ./N .C . Two Position Heating Valve Byte 1: b5
1 = Normally Closed Heating Valve
0 = Normally Open Cooling Valve
N .O ./N .C . Two Position Cooling Valve Byte 1: b6
1 = Normally Closed Cooling Valve
0 = Two position Hydronic Valves
Two Position/Modulating Valves Byte 1: b7
1 = Modulating Hydronic Valves

Byte 2: b1=0, b0=0 00 = No Electric Heating

Byte 2: b1=0, b0=1 01 = One Stage Electric Heat
Electric Heat Selection
Byte 2: b1=1, b0=0 10 = Two Stage Electric Heat (Future)
11 = Not Valid

Byte 2: b4=0, b3=0, b2=0 000 = No Hydronic Valves

Byte 2: b4=0, b3=0, b2=1 001 = 2-Pipe Heating Only
Hydronic Valves Selection Byte 2: b4=0, b3=1, b2=0 010 = 2-Pipe Cooling Only
Byte 2: b4=0, b3=1, b2=1 011 = 2-Pipe Heat & Cool Changeover
Byte 2: b4=1, b3=0, b2=0 100 = 4-Pipe Hydronic Heat & Cool

Byte 2: b6=0, b5=0 00 = 1Speed (Uses: High)

Fan Speed Selection Byte 2: b6=0, b5=1 01 = 2Speed (Uses: Low, High)
Byte 2: b6=1, b5=0 10 = 3Speed (Uses: Low, Med, High)

0 = Disable Binary Input

Freeze Fault Detect Binary Input Selection Byte 2: b7
1 = Enable Binary Input

0 = Disable Binary Input

Emergency Shutdown Binary Input Selection Byte 3: b0
1 = Enable Binary Input
0 = Disable Binary Input
Dirty Air Filter* Binary Input Selection Byte 3: b1
1 = Enable Binary Input
*Currently functions based on user-adjustable timer

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MicroTech Unit Controller with an optional lonWorks® Communication Module

For installation and operation information on LonWorks The MicroTech unit controller with communication module
Communication Module and other ancillary control includes a unit-mounted discharge air and entering water
components, see: temperature sensors . Entering air temperature can be
• IM 1012 — MicroTech III Fan Coil LonWorks monitored either by selecting either unit-mounted return air
temperature or wall- mounted room temperature sensors .
Communication Module .
Room sensor options includes one with a setpoint adjustment,
• IM 933 — LonMaker Integration Plug-in Tool: For use with unit mode, fan speed, and tenant override . See actual sensor
the MicroTech III Unit Controller . to make sure these options are present .
• IM 1171 — Digitally Adjustable Display Sensor Installation
MicroTech Unit Controller with LonWorks Communication
and Maintenance Manual
Module orchestrates the following unit operations:
Each Daikin ThinLine fan coil can be equipped with a
LonWorks communication module that is • Enable heating and cooling to maintain setpoint based on
LonMark 3.4 certified to meet the LonMark a room sensor
Space Comfort Control (SCC) profile for • Monitors all equipment protection controls
fan coils . The controller is microprocessor- • Monitors room and discharge air temperatures
based and is designed to communicate • Monitors outside air temperature for units with
over a LonWorks network with the optional economizer option
factory or field-installed communication module.
• Relays status of all vital unit functions
The unit controller is programmed and tested with all the
The MicroTech unit controller with an optional communication
logic required to monitor and control the unit . An optional wall
module should include:
sensor may be used with the communication module to provide
limited local control of the Fan Coil or Cabinet Unit Heater unit . • Return Air Temperature sensor (RAT) (factory- or field-
The unit controller monitors water and air temperatures and mounted)
passes information to the communication module . The module • Discharge Air Temperature sensor (DAT) (factory- or field-
communicates with the BAS to provide network control of the mounted)
Fan Coil or Cabinet Unit Heater unit . • Entering Water Temperature sensor (EWT) (factory- or
field-mounted)
Figure 7: LonWorks Communication Module NOTE: Refer to IM 956 for details to install (RAT) & (DAT)

WARNING
When an optional wall-mounted room temperature
sensor is connected to the unit controller, the Return
Air Temperature (RAT) sensor must not be installed .
A wall-mounted room temperature sensor and the
return air temperature sensor must not be connected
simultaneously or the unit will not operate properly .

The communication module provides access to setpoints for

operational control
Available wall sensors include:
• Room sensor with LED status and tenant override button
• Room sensor with LCD display, fan speed selection
switch, tenant override button, and ±5°F setpoint
adjustment
• Room sensor with LCD display, fan speed selection
switch, tenant override button, 55° to 95°F setpoint
adjustment

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MicroTech Unit Controller with an optional BACnet® Communication Module

For installation and operation information on MicroTech unit MicroTech Unit Controller with BACnet MS/TP Communication
controller and other ancillary components, see: Module orchestrates the following unit operations:
• IM 1013 — MicroTech Fan Coil BACnet Communication • Enable heating and cooling to maintain setpoint based on
Module a room sensor
• IM 1171 — Digitally Adjustable Display Sensor Installation • Monitors all equipment protection controls
and Maintenance Manual • Monitors room and discharge air temperatures
Daikin ThinLine fan coils and cabinet unit heaters are available • Monitors outside air temperature for units with
with an optional BACnet MS/ economizer option
TP communication module that
• Relays status of all vital unit functions
is designed to communicate
over a BACnet MS/TP The MicroTech unit controller with an optional communication
communications network to a building automation system module should include:
(BAS). It can be factory or field-installed. • Return Air Temperature sensor (RAT) (factory- or field-
The module makes operational data and commands available mounted)
on a communications network using BACnet objects and • Discharge Air Temperature sensor (DAT) (factory- or field-
properties: mounted)
• The network cable is a shielded twisted-pair cable • Entering Water Temperature sensor (EWT) (factory- or
field-mounted)
• Network communications run up to 76 .8 Kbps
NOTE: Refer to IM 956 for details to install (RAT) & (DAT)
• DIP switches on the controller enable the MS/TP MAC
address to be set in the range 0-127
• Four green status LEDs on the communication WARNING
module indicate communication activity on the MS/TP When an optional wall-mounted room temperature
communication network and with the unit controller sensor is connected to the unit controller, the Return
Air Temperature (RAT) sensor must not be installed .
Figure 8: MicroTech BACnet MS/TP Snap-in A wall-mounted room temperature sensor and the
Communication Module return air temperature sensor must not be connected
simultaneously or the unit will not operate properly .

The communication module provides access to setpoints for

operational control
Available wall sensors include:
• Room sensor with LED status and tenant override button
• Room sensor with LCD display, fan speed selection
switch, tenant override button, and ±5°F setpoint
adjustment
• Roomsensor with LCD display, fan speed selection
switch, tenant override button, 55° to 95°F setpoint
adjustment

The unit controller is programmed and tested with all the logic
required to monitor and control the unit . An optional wall sensor
may be used with the communication module to provide limited
local control of the fan coils and cabinet unit heater unit . Room
sensor options include one with a setpoint adjustment, unit
mode, fan speed, and tenant override . See actual sensor to
make sure these options are present .
The unit controller monitors water and air temperatures and
passes information to the communication module . The module
communicates with the BAS, to provide network control of the
fan coils and cabinet unit heater unit .

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Typical Wiring Diagrams

Figure 9: 1 PSC Motor, No Electric Heat, 2 Position Actuators, 2 Position Valves – Page 1

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Figure 10: 1 PSC Motor, No Electric Heat, 2 Position Actuators, 2 Position Valves – Page 2

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Figure 11: 1 PSC Motor, No Electric Heat, Valve1 FLT, No Return Air Temperature – Page 1

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Figure 12: 1 PSC Motor, No Electric Heat, Valve1 FLT, No Return Air Temperature – Page 2

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Figure 13: ECM Motor, Electric Heat, 230V, Economizer – Page 1

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Figure 14: ECM Motor, Electric Heat, 230V, Economizer – Page 2

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Daikin Applied Training and Development

Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high
priority. For training information on all Daikin HVAC products, please visit us at www.DaikinApplied.com
and click on Training, or call 540-248-9646 and ask for the Training Department.

Warranty

All Daikin equipment is sold pursuant to its standard terms and conditions of sale, including Limited
Product Warranty. Consult your local Daikin Applied representative for warranty details. To find your
local Daikin Applied representative, go to www.DaikinApplied.com.

Aftermarket Services

To find your local parts office, visit www.DaikinApplied.com or call 800-37PARTS (800-377-2787).
To find your local service office, visit www.DaikinApplied.com or call 800-432-1342.

This document contains the most current product information as of this printing. For the most up-to-date
product information, please go to www.DaikinApplied.com.

Products manufactured in an ISO Certified Facility.

OM 1111-2 (10/15) ©2015 Daikin Applied | (800) 432–1342 | www .DaikinApplied .com

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Sales and Engineering Data ED 19059-3

Group: Applied Air Systems
Part Number: ED 19059
Date: June 2018

ThinLine and Large Cap Fan Coils

ECM Speed Adjustment Board
(EVO Board)

Overview
The constant CFM ECM when wired to with the ECM speed
adjustment board (EVO Board) allows the user the manually
adjust the airflow for each of the three fan speeds by turning
a dial. Each speed may be adjusted across the full RPM
range of the motor and once set the new flow rate will then be
maintained by the motor despite changes to the system static
pressure. The CFM for each speed setting may be determined
by measuring the airflow in the system or by measuring the DC
voltage between the adjusted terminal and the reference point
on the board. If desired, the motor may be used without speed
adjustment by replacing the wire harness from the EVO board
with the standard wire harness. In this case the motor will run
at the factory programmed flow rates.

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Overview

Overview

Connecting the Unit to Field Power Connecting the Unit to a 24V Thermostat
Line voltage power wires L1 and Com are connected to S2 or Controller
as shown. A factory provided step down transformer provides The factory provided 24VAC transformer should be used to
24VAC power for the ECM control and the EVO board and the provide power for the field mounted t-stat by connecting the
factory provided 16 pin wire harness connects the EVO board 24V input to TB2 terminal B and the common to TB2 terminal
to the ECM (Figure 7 and Figure 8). E. The three t-stat fan speed outputs are connected to the EVO
board spade terminals labeled Flo1, Flo2 and Flo3 (Figure 1).
When a t-stat fan speed output is energized, the fan will run
at the speed set at the corresponding flow dial until the speed
output is de-energized.

Figure 1: EVO Board Key Components and Locations

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 Addendum—ED 19059

Wiring

Wiring

Adjusting Fan Speed Bypassing the EVO board

The fan will run at the factory set flow rates when the unit is If the EVO board should fail or if it is not needed, the EVO
installed. If different flow rate is required, turn the flow dial board may be bypassed allowing the ECM to operate at the
(Figure 1) corresponding to the Flo terminal until the desired factory programmed fixed flow rates. To bypass the EVO board
CFM is achieved or the measured DC reference voltage unplug the 16 pin EVO board wire harness (Figure 3) from the
between the com port and corresponding flo port equals the ECM and the board and remove it from the unit. Locate the
correct value from Table 2 through Table 13 on page 8. standard 16 pin wire harness (included in the unit paper work
packet) and plug it into the motor. The individual wires on the
For example, if terminal Flo1 is on and the Flo1 dial is turned
until the Flo1 reference voltage = 2.5, then the motor will run other end of the harness connect wire 78 (blue) to terminal
at the CFM that corresponds to 2.5V. C on terminal block TB2 and wire 73 (green) to terminal D
on terminal block TB2. Connect the five fan speed wires, 77,
NOTE: The Flo0 dial should always be set at 0V to prevent 74, 75, 76, and 80 to terminals HI+, HI-, MED, LO+ and LO-
the fan from running when all speed outputs are OFF. respectively on terminal block TB4. Connect the field mounted
t-stat 24V+ and common to terminals B and E, respectively, on
terminal block TB2. Apply 24V to any of the five speed inputs on
TB4 to run motor at that speed

Figure 2: Typical EVO Board Wiring for a Single Motor Large Cap Unit

www.DaikinApplied.com 3 ED 19059-3 • EVO CONTROL BOARD

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Wiring

Figure 3: Single Motor EVO Board Bypass Wiring Detail for Large Cap Unit

Figure 4: Two Motor EVO Board Bypass Wiring Detail for Large Cap Unit

Table 1: Large Cap Wiring Schematics

Drawing Number Description
910116769 ECM with 3 speed control, 115V, 1 Motor
910167425 ECM with 3 speed control, 115V, 2 Motors
910167454 ECM with 3 speed control, 208-230V, 1 Motor
910167432 ECM with 3 speed control, 208-230V, 2 Motors
910167455 ECM with 3 speed control, 265-277V, 1 Motor
910167433 ECM with 3 speed control, 265-277V, 2 Motors
910165943 ECM with EVO Board, 115V, 1 Motor
910166611 ECM with EVO Board, 115V, 2 Motors
910165944 ECM with EVO Board, 208-230V, 1 Motor
910166613 ECM with EVO Board, 208-230V, 2 Motors
910165945 ECM with EVO Board, 265-277V, 2 Motors

ED 19059-3 • EVO CONTROL BOARD 4 www.DaikinApplied.com

158 IM 1152-10
 Addendum—ED 19059

Wiring

Figure 5: Single Motor EVO Board Bypass Wiring Detail for ThinLine Unit

Figure 6: Two Motor EVO Board Bypass Wiring Detail for ThinLine Unit

www.DaikinApplied.com 5 ED 19059-3 • EVO CONTROL BOARD

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Addendum—ED 19059

Wiring

Figure 7: Standard 16 pin Wire Harness Detail

Figure 8: EVO Board 16 Pin Wire Harness Detail

ED 19059-3 • EVO CONTROL BOARD 6 www.DaikinApplied.com

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 Addendum—ED 19059

Reference Voltage Tables

Table 7: Size 2 Voltage Table–ThinLine Table 11: Size 8 Voltage Table–ThinLine

Speed Voltage* CFM* Speed Voltage* CFM*
LOW 1.31 VDC 158 @ 0ʺ WC LOW 0.89 VDC 410 @ 0ʺ WC
MED 1.95 VDC 228 @ 0ʺ WC MED 2.77 VDC 627 @ 0ʺ WC
HIGH 2.16 VDC 308 @ 0ʺ WC HIGH 4.95 VDC 825 @ 0ʺ WC

Table 8: Size 3 Voltage Table–ThinLine Table 12: Size 10 Voltage Table–ThinLine

Speed Voltage* CFM* Speed Voltage* CFM*
LOW 1.53 VDC 177 @ 0ʺ WC LOW 0.50 VDC 551 @ 0.05ʺ WC
MED 2.11 VDC 265 @ 0ʺ WC MED 2.55 VDC 825 @ 0ʺ WC
HIGH 2.77 VDC 352 @ 0ʺ WC HIGH 4.40 VDC 1105 @ 0ʺ WC

Table 9: Size 4 Voltage Table–ThinLine Table 13: Size 12 Voltage Table–ThinLine

Speed Voltage* CFM* Speed Voltage* CFM*
LOW 1.74 VDC 228 @ 0.05ʺ WC LOW 0.47 VDC 719 @ 0ʺ WC
MED 2.46 VDC 337 @ 0.05ʺ WC MED 2.50 VDC 1010 @ 0ʺ WC
HIGH 3.20 VDC 452 @ 0.05ʺ WC HIGH 4.60 VDC 1344 @ 0ʺ WC

Table 10: Size 6 Voltage Table–ThinLine * These values are all approximates and based on testing with
the 3 row coil.
Speed Voltage* CFM*
LOW 1.40 VDC 340 @ 0.1ʺ WC ** MAX VDC is referring to the dial being turned to its
MED 2.1 VDC 522 @ 0.1ʺ WC MAXIMUM voltage output.
HIGH 2.75 VDC 711 @ 0.1ʺ WC

Page 7 intentionally omitted

ED 19059-3 • EVO CONTROL BOARD 8 www.DaikinApplied.com

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Addendum—ED 19059

Daikin Applied Training and Development

Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high
priority. For training information on all Daikin HVAC products, please visit us at www.DaikinApplied.com
and click on Training, or call 540-248-9646 and ask for the Training Department.

Warranty

All Daikin equipment is sold pursuant to its standard terms and conditions of sale, including Limited
Product Warranty. Consult your local Daikin Applied Representative for warranty details. To find your
local Daikin Applied Representative, go to www.DaikinApplied.com.

Aftermarket Services

To find your local parts office, visit www.DaikinApplied.com or call 800-37PARTS (800-377-2787).
To find your local service office, visit www.DaikinApplied.com or call 800-432-1342.

This document contains the most current product information as of this printing. For the most up-to-date
product information, please go to www.DaikinApplied.com.

Products manufactured in an ISO Certified Facility.

ED 19059-3 (06/18) ©2018 Daikin Applied | (800) 432–1342 | www.DaikinApplied.com

162 IM 1152-10
Daikin Applied Training and Development
Now that you have made an investment in modern, efficient Daikin Applied equipment, its care should
be a high priority. For training information on all Daikin Applied HVAC products, please visit us at
www.DaikinApplied.com and click on Training, or call 540-248-9646 and ask for the Training Department.

Warranty

All Daikin Applied equipment is sold pursuant to its standard terms and conditions of sale, including
Limited Product Warranty. Consult your local Daikin Applied Representative for warranty details. Refer
to Form 933-430285Y. To find your local Daikin Applied Representative, go to www.DaikinApplied.com.

Aftermarket Services

To find your local parts office, visit www.DaikinApplied.com or call 800-37PARTS (800-377-2787).
To find your local service office, visit www.DaikinApplied.com or call 800-432-1342.
This document contains the most current product information as of this printing. For the most up-to-date
product information, please go to www.DaikinApplied.com.

Products manufactured in an ISO Certified Facility.

IM 1152-10 (07/24) ©2023 Daikin Applied | (800) 432–1342 | www.DaikinApplied.com