INSTALLATION, OPERATION & MAINTENANCE

IOM 1359-1
NOVEMBER 2024

TRAILBLAZER® AGZ-F
AIR-COOLED SCROLL CHILLERS

• MODEL AGZ, F VINTAGE

• 30 TO 230 TONS
• R-32 REFRIGERANT

©2024 DAIKIN APPLIED | (800) 432.1342 LEARN MORE AT DAIKINAPPLIED.COM

TABLE OF CONTENTS

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Circuit Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Hazard Identification Information . . . . . . . . . . . . . . . . 3 Alarm and Events . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
UL Compliance Statements for Unit Work . . . . . . . . . 4 Touchscreen Controller . . . . . . . . . . . . . . . . . . . . . . 77
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Home Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Unit/Setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Circuit 1/Circuit 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Nameplates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Lifting Guidance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Startup/Shutdown Procedures . . . . . . . . . . . . . . . . . 79
Unit Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Pre-Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Service Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Startup Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Application Consideration . . . . . . . . . . . . . . . . . . . . 13 Post Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Chilled Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . 13 Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Water Flow Limitations . . . . . . . . . . . . . . . . . . . . . . . 14 Pre-Startup (Pumps) . . . . . . . . . . . . . . . . . . . . . . . . 80
System Water Considerations . . . . . . . . . . . . . . . . . 15 Startup (Pumps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Pump Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Seasonal Shutdown (Pumps) . . . . . . . . . . . . . . . . . . 82
Standard Components of Pump Packages . . . . . . . 19 Flow Switch Installation and Calibration . . . . . . . . . . 82
Pump Operating Control . . . . . . . . . . . . . . . . . . . . . 19 Unit Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Pump Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
BAS Integration of Pumps . . . . . . . . . . . . . . . . . . . . 22 Electrical Terminals . . . . . . . . . . . . . . . . . . . . . . . . . 87
Remote Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Compressor Maintenance . . . . . . . . . . . . . . . . . . . . 87
Refrigerant Piping and Application . . . . . . . . . . . . . . 24 Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Wiring for Remote Evaporators . . . . . . . . . . . . . . . . 29 All-Aluminum Condenser Coils . . . . . . . . . . . . . . . . 87
Service Pumpdown . . . . . . . . . . . . . . . . . . . . . . . . . 30 Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Remote Evaporator Field Wiring . . . . . . . . . . . . . . . 31 Liquid Line Solenoid Valve . . . . . . . . . . . . . . . . . . . . 89
Pressure Drop Data . . . . . . . . . . . . . . . . . . . . . . . . . . 33 High Ambient Control Panel . . . . . . . . . . . . . . . . . . . 89
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Hot Gas Bypass (Optional) . . . . . . . . . . . . . . . . . . . 90
Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . 35 Transformer Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Refrigerant Charging . . . . . . . . . . . . . . . . . . . . . . . . 94
Unit Controller Operation . . . . . . . . . . . . . . . . . . . . . 39 Refrigerant Guidelines . . . . . . . . . . . . . . . . . . . . . . . 95
General Description . . . . . . . . . . . . . . . . . . . . . . . . . 39 Competence of Personnel . . . . . . . . . . . . . . . . . . . . 95
Controller Inputs and Outputs . . . . . . . . . . . . . . . . . 40 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Set Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Unit Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Pre-Start Checklist . . . . . . . . . . . . . . . . . . . . . . . . . 101
Unit Capacity Overrides . . . . . . . . . . . . . . . . . . . . . . 50 Warranty Registration Form . . . . . . . . . . . . . . . . . . 102
RapidRestore Option . . . . . . . . . . . . . . . . . . . . . . . . 50 Limited Product Warranty . . . . . . . . . . . . . . . . . . . . 109

©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, SiteLine, RapidRestore, Trailblazer, 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.; Modbus from Schneider Electric; and Windows from Microsoft Corporation.

DAIKIN APPLIED 2 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Safety Information

Safety Information WARNING

This manual provides installation, operation, and maintenance Electric shock hazard. Improper handling of this equipment can
information for Daikin Applied Trailblazer® AGZ-F air-cooled scroll cause personal injury or equipment damage. This equipment
chillers with a MicroTech® unit controller. must be properly grounded. Connections to and service of the
MicroTech control panel must be performed only by personnel
NOTICE that are knowledgeable in the operation of the equipment being
Installation and maintenance are to be performed only by controlled.
licensed, if required by local codes and regulations, or qualified
personnel who are familiar with local codes and regulations and WARNING
are experienced with this type of equipment. Polyolester Oil, commonly known as POE oil is a synthetic oil
used in many refrigeration systems, and may be present in this
WARNING Daikin Applied product. POE oil, if ever in contact with PVC/
This unit contains R-32, a class A2L CPVC, will coat the inside wall of PVC/CPVC pipe causing
refrigerant that is flammable. This unit environmental stress fractures. Although there is no PVC/CPVC
should only be installed, serviced, piping in this product, please keep this in mind when selecting
repaired, and disposed of by qualified piping materials for your application, as system failure and
personnel licensed or certified in their property damage could result. Refer to the pipe manufacturer’s
jurisdiction to work with R-32 refrigerant. recommendations to determine suitable applications of the pipe.
Installation and maintenance must be
done in accordance with this manual. CAUTION
Improper handling of this equipment can Static sensitive components. A static discharge while handling
cause equipment damage or personal electronic circuit boards can cause damage to the components.
injury. Discharge any static electrical charge by touching the bare
For installation only in locations not accessible to the general metal inside the control panel before performing any service
public. work. Never unplug any cables, circuit board terminal blocks, or
power plugs while power is applied to the panel.
Be aware that R-32 refrigerant may not contain an odor. Place
in a well ventilated area to prevent accumulation of refrigerant.
Do not pierce or burn this unit. Hazard Identification Information
Never use an open flame during service or repair. Never store in
a room with continuously operating ignition sources (for example: DANGER
open flames, an operating gas appliance, or an operating electric Danger indicates a hazardous situation, which will result in
heater), where there is ignitable dust suspension in the air, or death or serious injury if not avoided.
where volatile flammables such as thinner or gasoline are
handled. WARNING
Only use pipes, nuts, and tools intended for exclusive use with Warning indicates a potentially hazardous situations, which
R-32 refrigerant in compliance with national codes (ASHRAE15 can result in property damage, personal injury, or death if not
or IRC). avoided.
Do not mix air or gas other than R-32 in the refrigerant system.
If air enters the refrigerant system, an excessively high pressure CAUTION
results, which may cause equipment damage or injury. Caution indicates a potentially hazardous situations, which can
Do not use means to accelerate the defrosting process or to result in minor injury or equipment damage if not avoided.
clean, other than those recommended by the manufacturer.
For more information, consult “Refrigerant Guidelines” on page NOTICE
95. Notice indicates practices not related to physical injury.

DANGER
NOTE: Indicates important details or clarifying statements for
LOCKOUT/TAGOUT all power sources prior to service, information presented.
pressurizing, de-pressuring, or powering down the unit. Failure
to follow this warning exactly can result in serious injury or death.
Disconnect electrical power before servicing the equipment.
More than one disconnect may be required to denergize the
unit. Be sure to read and understand the installation, operation,
and service instructions within this manual.

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Safety Information

UL Compliance Statements for Unit

Work
• All maintenance staff and others working in the local area
shall be instructed on the nature of work being carried out.
Work in confined spaces shall be avoided.
• Work shall be undertaken under a controlled procedure so
as to minimize the risk of a flammable gas or vapor being
present while the work is being performed.
• The area shall be checked with an appropriate refrigerant
detector prior to and during work, to ensure the technician
is aware of potentially toxic or flammable atmospheres.
Ensure that the leak detection equipment being used is
suitable for use with all applicable refrigerants, i. e. non-
sparking, adequately sealed or intrinsically safe.
• If any hot work is to be conducted on the refrigerating
equipment or any associated parts, appropriate fire
extinguishing equipment shall be available to hand. Have
a dry powder or CO2 fire extinguisher adjacent to the
charging area.
• No person carrying out work in relation to a
REFRIGERATING SYSTEM which involves exposing
any pipe work shall use any sources of ignition in such
a manner that it may lead to the risk of fire or explosion.
All possible ignition sources, including cigarette smoking,
should be kept sufficiently far away from the site of
installation, repairing, removing and disposal, during which
refrigerant can possibly be released to the surrounding
space.
• Prior to work taking place, the area around the equipment
is to be surveyed to make sure that there are no flammable
hazards. Safety checks are necessary to ensure that the
risk of ignition is minimized and “No Smoking” signs shall be
displayed.
• Ensure that the area is in the open or that it is adequately
ventilated before breaking into the system or conducting
any hot work. A degree of ventilation shall continue during
the period that the work is carried out. The ventilation
should safely disperse any released refrigerant and
preferably expel it externally into the atmosphere.
• Equipment not to be used by persons (including children)
with reduced physical, sensory or mental capabilities, or
lack of experience and knowledge, unless they have been
given supervision or instruction.
• Children shall not be allowed to play on or with equipment.
• If unit is permanently connected to water main; hose sets
are not to be used.
• Maximum water side operating pressure for unit is 435 psig.

DAIKIN APPLIED 4 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Introduction

Introduction Unit Labels

Pictogram warning and informational labels may be present on
the unit. Consult the table below for reference.
General Description
Daikin Applied Trailblazer air-cooled water chillers are complete, Label Description
self-contained, automatic chillers designed for outdoor installation
only. Packaged units are completely assembled, factory wired,
charged, and tested.
WARNING - flammable refrigerant
The electrical control center includes all equipment protection present
and operating controls necessary for dependable automatic
operation. Components housed in a centrally located, weather
resistant control panel with hinged and tool-locked doors.

Nomenclature
WARNING - flammable refrigerant
present

Read the technical manual for

service instructions

No. Description
1 A = Air-Cooled
WARNING - A2L low-burning veloc-
2 G = Global ity refrigerant present
3 Z = Scroll Compressor
4 Number of Fans
5 Design Vintage
6 Compressor Code

Pressurized medium present

Ultraviolet (UV) radiation present

Read the technical manual for

instructions

IOM 1359-1 5 WWW.DAIKINAPPLIED.COM

Installation

Installation Inspection
NOTICE
Operating Limits All units should be carefully inspected for damage when received. Report all
loss or shipping damage using a claim form supplied by Daikin Applied.

Table 1: Operating/Standby Limits VISIBLE LOSS OR DAMAGE: Any external evidence of loss or damage
must be noted on the freight bill or carrier’s receipt, and signed by the carrier’s
Operating/Standby Limits Temperature agent. Failure to adequately describe such external evidence of loss or damage
Maximum standby ambient temperature 130°F (54°C) may result in the carrier’s refusal to honor a damage claim.
Maximum operating ambient temperature 105°F (41°C) CONCEALED LOSS OR DAMAGE: Concealed loss or damage
Maximum operating ambient temperature with means loss or damage which does not become apparent until the unit has
optional high ambient package (see information 125°F (52°C) been unpacked or unwrapped. The contents may be damaged in transit due
under High Ambient Operation) to rough handling even though the exterior may not show damages. When the
Minimum operating ambient temperature (stan- damage is discovered, make a written request for inspection by the carrier’s
32°F (0°C)
dard control) agent within five (5) days of the delivery date and file a claim with the
Minimum operating ambient temperature (with form provided by Daikin Applied. Refer to the Daikin Applied Freight Policy for
-4°F (-20°C)
optional low-ambient control) further information.
40°F to 65°F (4°C Check all items carefully against the bill of lading. Inspect all
Leaving chilled water temperature
to 18°C) units for damage upon arrival. Check the unit nameplate before
Leaving chilled fluid temperatures (with glycol) unloading, making certain it matches with the power supply
- Note that in cases of high ambient tempera- available. Daikin Applied is not responsible for physical damage
ture, the lowest leaving water temperature 15°F to 65°F (-9°C
settings may be outside of the chiller operating to 18°C) after the unit leaves the factory.
envelope; consult Daikin Tools to ensure chiller
is capable of the required lift.

Operating chilled water delta-T range

6°F to 20°F (3.3°C Lifting Guidance
to 11.1°C)
Daikin Applied equipment is designed to withstand the loads of
Maximum evaporator operating inlet fluid the lifting and rigging process resulting from ASME Standard
81°F (27°C)
temperature
P30.1 - Planning for Load Handling Activities or equivalent.
Maximum evaporator non-operating inlet fluid Lifting guidance is intended for installations of newly delivered
100°F (38°C)
temperature equipment. If moving previously installed equipment for re-
location or disposal, consideration should be given to unit
condition. Equipment should also be drained as unit weight and
Nameplates center of gravity values do not reflect the addition of water for
The unit nameplate is located on the exterior of the Unit Power lifting.
Panel. Both the Model No. and Serial No. are located on the unit
nameplate; the Serial No. is unique to the unit. These numbers DANGER
should be used to identify the unit for service, parts, or warranty Improper rigging, lifting, or moving of a unit can result in unit
questions. This plate also has the unit refrigerant charge and damage, property damage, severe personal injury, or death.
electrical ratings. Evaporator data plate is under insulation and See the as-designed, certified dimensioned drawings included
contains the serial number. Compressor nameplate is located on in the job submittal for the weights and center of gravity of the
each compressor and gives pertinent electrical information. unit. If the drawings are not available, consult the local Daikin
Applied sales office for assistance.
WARNING
Installation is to be performed only by qualified personnel who
Installation is to be performed by qualified personnel who are are familiar with local codes and regulations, and experienced
familiar with local codes and regulations. with this type of equipment. Lifting equipment and mechanisms
must be determined by the Lifting Director per the current version
CAUTION of ASME Standard P30.1 or equivalent and must be suited for the
When around sharp edges, wear appropriate Personal Protective load capacity.
Equipment (PPE), such as gloves, protective clothing, foot wear, Daikin Applied is not a licensed nor certified rigging specialist.
eye protection etc. to prevent personal injury. Therefore it is the customer’s responsibility to consult a certified
rigging contractor to rig, lift, and move components and
subcomponents properly and safely as needed.

CAUTION
Forklifts may not be used to lift or move Trailblazer units as the
method may result in unit damage.

DAIKIN APPLIED 6 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Installation

Figure 2: Illustration of Allowed Angle Label

CAUTION
When around sharp edges, wear appropriate Personal Protective
Equipment (PPE), such as gloves, protective clothing, foot wear,
eye protection, etc. to prevent personal injury.

Lifting Brackets
Lifting bracket designs vary from product to product. Rules of
engagement with the lifting brackets are the same regardless of
the bracket type. For Trailblazer units, a typical lifting bracket with
2ʺ (51 mm) diameter holes found on the sides of the unit base
are illustrated in Figure 1. See the as-designed certified drawings
for specific lifting points on this product model.
Engagement with each bracket is to be as close to vertical as
possible. The maximum allowable lift angle from the vertical is
30° as shown in Figure 2. If the lift angle shifts beyond 30 ° from
vertical on any of the lift points, the lift shall not proceed until
a corrective plan is formulated and rigging can be secured to
correct the angle of the lift.

WARNING
The lifting angle must not go beyond 30 degrees from vertical or
the unit can become unstable which may result in unit damage, Lifting Equipment
property damage, severe personal injury, or death. Lifting equipment is supplied by the user or their designate.
This is typically selected around the unit certified information
Figure 1: Illustration of Lifting Bracket and Allowed Angle for of the equipment to be lifted and the available lifting equipment
Lifting planned to be at the site where the lift is to take place. It is the
responsibility of the Lifting Director to follow a standard practice
of lift planning and equipment selection, like that found in the
ASME P30 series of standards. Lifting plan and equipment must
ensure that the only contact with the unit is at the lifting brackets.
Straps, chains or spreader bars that are likely to be used shall
not come in contact with the unit.

CAUTION
Lifting mechanisms must not make contact with the unit beyond
the lifting bracket. Extreme care must be used when rigging the
unit to prevent damage to the control panels, unit handles, unit
piping, and unit frame.

Lifting Points
Lifting points are predetermined by design. When lifting, all
factory installed lifting brackets must be used. Figure 3 illustrates
typical 8 point lifting configuration, with four lifting points on each
side of the unit. The unit must remain level throughout the entire
lifting event. Level is defined as one end being no more than
0.25” per foot of unit length to the opposite end.

WARNING
Be aware that the center of gravity may not necessarily be in the
geometric center of the unit. No additional items can be added to
a lift with the unit as it may affect the center of gravity and cause
unit damage, property damage, severe personal injury, or death.
Refer to as-designed, certified drawings for weight, center of
gravity location and details specific to unit configuration.

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Installation

Figure 3: Lifting Points Locations When the unit is being tied down for transit, the maximum
allowable attachment angle from the vertical is 30 degrees in the
opposite direction of lifting. Shimming of the unit under the lifting
brackets or tie-down points must be used to ensure even contact
along the length of the base rail.

Long Term Storage

This information applies to new units being stored waiting for
startup or existing units that may be inoperative or in storage for
four months or more.
The chiller must be stored in a secure location and protected
from any damage or sources of corrosion while in storage. It
is recommended that a Daikin Applied service representative
perform a leak test and visual inspection for any damage or
unusual conditions affecting the unit on a minimum quarterly
schedule, to be paid by the owner or contractor. Daikin Applied
will not be responsible for any refrigerant loss during the storage
time, for repairs to the unit during the storage period, or while
moving the unit from the original location to a storage facility and
WARNING back to any new installation location. If there is concern about
After the unit is securely in place, remove the lifting brackets the possibilities of damage and loss of charge during storage, the
and install the wire guards. The guards must be in place prior customer can have the charge removed and stored in recovery
to start up. Failure to do so can result in damage to the unit or cylinders.
personal injury.
CAUTION
Figure 4: Lifting Brackets Removed and Guards Installed
If the temperature of where the chiller is located is expected to
exceed 130°F (54.4°C), then the refrigerant must be removed.
It is necessary to observe some precautions during storage:
• Do not keep the machine near a heat source and/or open
flame.
• Humid environments may cause condensate corrosion on
steel surfaces. Consider adding a desiccant material to
alleviate corrosion concerns.
• For units previously installed, ensure water has been
drained from the unit or sufficient glycol has been added if
ambient temperature may be lower than 40°F (4.4°C).
For additional tasks required, contact a Daikin Applied service
representative.

Transit and Temporary Storage

If the unit is stored for an intermediate period before installation
or moved to a different location, take these additional
precautions:
1. Support the unit well along the length of the base rail.
2. Level the unit (no twists or uneven ground surface).
3. Provide proper drainage around the unit to prevent flooding
of the equipment.
4. Provide adequate protection from vandalism, mechanical
contact, etc.
5. Securely close the doors and lock the handles.

DAIKIN APPLIED 8 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Installation

Unit Placement Service Clearance

Trailblazer units are for outdoor applications only and can be
mounted either on a roof or at ground level. Figure 6: Service Clearance

NOTICE
Outdoor installations are defined as open to the atmosphere
with no permanent walls within the defined clearance distance
and no roof is allowed above the unit.
For roof mounted applications, install the unit on a steel channel
or I-beam frame to support the unit above the roof. Spring
isolators for roof applications are recommended. For ground
level applications, install the unit on a substantial base that will
not settle. Use a one-piece concrete slab with footings extended
below the frost line. Be sure the foundation is level within 0.5”
(13 mm) over its length and width. The foundation must be
strong enough to support the unit weight. Drawings, dimensional
values, and other information may change depending on options
or configurations selected. Refer to the as-built submittal
drawings provided by a Daikin Applied sales representative for
configuration-specific details.
The addition of neoprene waffle pads (supplied by customer) Table 2: Service Clearance
under the unit may allow water to drain from inside the frame,
which can act as a dam. Installation of optional spring or rubber- Side Minimum Notes
Clearance
in-shear isolators can also assist with drainage.
A 8 ft (2.4 m) Sides:
It is highly recommended to provide a
Mounting minimum of 8 feet (2.4 meters) on one side
The inside of the base rail is open to allow access for to allow for coil replacement. A minimum
of 4 feet (1.2 meters) of side clearance is
securing mounting bolts, etc. Refer to the as-built submittal required; however, the unit performance may
drawings provided by a Daikin Applied sales representative for be derated.
configuration-specific details. B 4 ft (1.2 m) Control Panel Side:
All compressor bolts, rubber grommets, and fasteners should Minimum of 4 feet (1.2 meters)
be left in place on the base plate as shown in Figure 5. None of C 4 ft (1.2 m) Sides:
these fasteners are considered to be ‘temporary shipping bolts. if all other It is highly recommended to provide a
requirements minimum of 8 feet (2.4 meters) on one side
are met to allow for coil replacement. A minimum
Figure 5: Compressor Base Plate Mounting of 4 feet (1.2 meters) of side clearance is
required; however, the unit performance may
be derated.
D 4 ft (1.2 m) Opposite Control Panel End:
Minimum of 4 feet (1.2 meters)

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Installation

Operational Spacing Requirements Case 2: Two Units, Side-by-Side

Sufficient clearance must be maintained between the unit and Percentage capacity reduction & percentage of power increase
adjacent walls or other units to allow the required unit air flow to for different spacing between units.
reach the coils. Failure to do so will result in a capacity reduction
and an increase in power consumption. No obstructions Figure 8: Two Units, Side-by-Side
are allowed above the unit at any height. The clearance
requirements shown are a general guideline and cannot account
for all scenarios. Such factors as prevailing winds, additional
equipment within the space, design outdoor air temperature, and
numerous other factors may require more clearance than what
is shown. Additional clearances may be required under certain
circumstances.

CAUTION
Unit performance may be impacted if the operational clearance
is not sufficient.

Case 1: Wall on One Side

NOTICE
Assumes a solid height wall taller than unit. Refer to Case 4 for
partial wall openings.
Table 4: Two Units, Side-by-Side
Table 3: Wall on One Side No. of Fans
Distance Between
No. of Fans Clearance Two Units 4 6 8 10 12 14
4-6 Fans 4 ft minimum clearance from any solid height wall % Capacity
0.0 1.0 2.0 2.5 NR NR
taller than unit Reduct. Unit
4 ft
8 Fans 6 ft minimum clearance from any solid height wall % Power
0.0 1.5 3.0 3.6 NR NR
taller than unit. Refer to Case 4 for partial open wall Increase Unit
10-14 fans 8 ft minimum clearance from any solid height wall % Capacity
0.0 0.5 1.2 2.0 NR NR
taller than unit. Refer to Case 4 for partial open wall Reduct. Unit
5 ft
% Power
0.0 0.7 1.7 3.0 NR NR
Figure 7: Building or Wall on One Side of Unit Increase Unit
% Capacity
0.0 0.0 0.5 1.4 2.5 3.0
Reduct. Unit
6 ft
% Power
0.0 0.0 0.7 2.0 3.5 4.0
Increase Unit
% Capacity
0.0 0.0 0.0 0.7 2.0 2.5
Reduct. Unit
8 ft
% Power
0.0 0.0 0.0 1.0 3.0 3.5
Increase Unit
NR = Not recommended due to air recirculation and elevated
condenser pressure and elevated power input

NOTICE
Distance between can only be reduced if the 8 ft (2.4 m)
clearance is on the outside of the two units for coil removal.

DAIKIN APPLIED 10 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Installation

Case 3: Three Units, Side by Side Case 4: Open Screening Walls

For outside units on each side of the middle unit - see case 2 Decorative screening walls are often used to help conceal a unit
above. Percentage of capacity reduction & percentage of power either on grade or on a rooftop. When possible, design these
increase for different spacing for the middle unit with a unit on walls such that the combination of their open area and distance
each side. from the unit do not require performance adjustment. If the wall
opening percentage is less than recommended for the distance
Figure 9: Three Units, Side-by-Side to the unit, it should be considered as a solid wall. It is assumed
that the wall height is equal to or less than the unit height when
mounted on its base support. If the wall height is greater than the
unit height, see Case 5: Pit/Solid Wall Installation. The distance
from the sides of the unit to the side walls must be sufficient for
service, such as opening control panel doors. For uneven wall
spacing, the distance from the unit to each wall can be averaged
providing no distance is less than 4 feet for most models. Values
are based on walls on all four sides.

Figure 10: Allowable Wall Open Area

Table 5: Three Units, Side-by-Side

Distance Between No. of Fans

Two Units 4 6 8 10 12 14
% Capacity
1.0 NR NR NR NR NR
Reduct. Unit
4 ft
% Power
2.0 NR NR NR NR NR
Increase Unit
% Capacity
0.0 1.0 NR NR NR NR
Reduct. Unit
5 ft Table 6: Open Wall Area vs. Distance from Unit
% Power
0.0 2.0 NR NR NR NR
Increase Unit
% Open No. of Fans
% Capacity Wall Area
0.0 0.0 2.0 3.0 4.0 5.0 4 6 8 10 12 14
Reduct. Unit
6 ft 0% 5.0 ft 6.0 ft 6.5 ft 7.0 ft 8.0 ft 8.0 ft
% Power
0.0 0.0 3.0 4.5 6.0 7.5
Increase Unit 10% 4.4 ft 5.4 ft 5.9 ft 6.4 ft 7.4 ft 7.4 ft
% Capacity 20% 4.0 ft 4.8 ft 5.4 ft 5.8 ft 6.8 ft 6.8 ft
0.0 0.0 1.4 2.0 3.0 4.0
Reduct. Unit
8 ft 30% 4.0 ft 4.0 ft 4.5 ft 5.2 ft 6.2 ft 6.2 ft
% Power
0.0 0.0 2.1 3.0 4.5 6.0 40% 4.0 ft 4.0 ft 4.0 ft 4.6 ft 5.6 ft 5.6 ft
Increase Unit
NR = Not recommended due to air recirculation and elevated 50% 4.0 ft 4.0 ft 4.0 ft 4.0 ft 5.0 ft 5.0 ft
condenser pressure and elevated power input
NOTICE
One side of the unit must have 8 ft clearance for coil removal.

IOM 1359-1 11 WWW.DAIKINAPPLIED.COM

Installation

Case 5: Pit/Solid Wall Installation Table 7: Pit/Solid Wall Installation - % Full Load Capacity
Reduction
Pit installations can cause operating problems resulting from air
recirculation and restriction and require care that sufficient air Height of Wall (ft)
clearance is provided, safety requirements are met and service No. of Distance
Fans from Wall Up
access is provided. A solid wall surrounding a unit is substantially 10 12 13 14
to 8
a pit and this data should be used. Derates are based on single 4 4 ft 0.0% 1.4% 6.0% NA NA
chiller installation only.
5 ft 0.0% 0.8% 3.2% 6.0% NA
Steel grating is sometimes used to cover a pit to prevent
6 ft 0.0% 0.0% 0.8% 1.6% 3.0%
accidental falls or trips into the pit. The grating material
and installation design must be strong enough to prevent 6-8 < 5 ft NA NA NA NA NA
such accidents, yet provide abundant open area to avoid 5 ft 0.5% 1.5% 6.0% NA NA
recirculation problems. Have any pit installation reviewed by the 6 ft 0.0% 0.8% 3.2% 6.0% NA
Daikin Applied sales representative prior to installation to ensure
8 ft 0.0% 0.0% 0.9% 1.6% 3.0%
it has sufficient air-flow characteristics and approved by the
installation design engineer to avoid risk of accident. 10 < 6 ft NA NA NA NA NA
6 ft 0.5% 1.5% 6.0% NA NA
Figure 11: Pit/Solid Wall Installation 8 ft 0.0% 0.8% 3.3% 6.0% NA
10 ft 0.0% 0.0% 0.8% 1.6% 3.0%
12-14 6 ft NA NA NA NA NA
6 ft 0.8% 1.8% 7.2% NA NA
8 ft 0.0% 1.0% 4.0% 7.2% NA
10 ft 0.0% 0.0% 1.0% 1.9% 3.6%
NA = Not Allowed

Table 8: Pit/Solid Wall Installation - % Full Load Power

Increase

Height of Wall (ft)

No. of Distance
Fans from Wall Up
10 12 13 14
to 8
4 4 ft 0.6% 2.0% 9.0% NA NA
5 ft 0.3% 1.2% 4.8% 6.0% NA
6 ft 0.0% 0.0% 0.8% 1.6% 3.0%
6-8 < 5 ft NA NA NA NA NA
5 ft 0.5% 1.5% 6.0% NA NA
6 ft 0.0% 0.8% 3.2% 6.0% NA
8 ft 0.0% 0.0% 0.9% 1.6% 3.0%
10 < 6 ft NA NA NA NA NA
6 ft 0.5% 1.5% 6.0% NA NA
8 ft 0.0% 0.8% 3.3% 6.0% NA
10 ft 0.0% 0.0% 0.8% 1.6% 3.0%
12-14 6 ft NA NA NA NA NA
6 ft 0.8% 1.8% 7.2% NA NA
8 ft 0.0% 1.0% 4.0% 7.2% NA
10 ft 0.0% 0.0% 1.0% 1.9% 3.6%
NA = Not Allowed

DAIKIN APPLIED 12 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Application Consideration

Application Consideration • Water pressure gauge connection taps and gauges at the
inlet and outlet connections of the evaporator for measuring
water pressure drop.

Chilled Water Piping It is recommended that the field-installed water piping to the
chiller include:
All evaporators and condensers have OGS-type grooved water
• Thermometers at the inlet and outlet connections of the
connections (adhering to Standard AWWA C606). The installing
evaporator.
contractor must provide matching mechanical connections.
Be sure that water inlet and outlet connections match certified • Vibration eliminators in both the supply and return water
drawings and nozzle markings. lines.
• Insulated chilled water piping to reduce heat loss and
NOTICE prevent condensation. For information on freeze protection,
PVC piping should not be used. see “Evaporator Freeze Protection” on page 15.
• Isolation valves installed in the incoming and outgoing water
WARNING piping to the evaporator.
Polyolester Oil, commonly known as POE oil is a synthetic oil NOTICE
used in many refrigeration systems, and is present in this Daikin
Failure to follow these measures may result in performance and
Applied product. POE oil, if ever in contact with PVC/CPVC, will
reliability issues.
coat the inside wall of PVC/CPVC pipe causing environmental
stress fractures. Although there is no PVC/CPVC piping in this
product, please keep this in mind when selecting piping materials Figure 12: Typical Piping, Brazed-Plate Evaporator
for your application, as system failure and property damage
could result. Refer to the pipe manufacturer’s recommendations
to determine suitable applications of the pipe.

CAUTION
To prevent damage to the evaporator and potential chiller failure,
a supply strainer is required in the inlet water piping which
connects to this evaporator. This strainer must be installed prior
to operation of the chilled liquid pumps.
Field installed water piping to the chiller must include:
• A cleanable strainer installed at the water inlet to the
evaporator to remove debris and impurities before they
reach the evaporator. Install cleanable strainer within 5
feet (1500 mm) of pipe length from the evaporator inlet NOTICE
connection and downstream of any welded connections (no Welded pipe connections are not allowed between the strainer
welded connections between strainer and evaporator). and evaporator due to the chance of slag entering the evaporator.
• Adequate piping support to eliminate weight and strain on Evaporator may be oriented with connections on a different side
the fittings and connections. than shown.
• A water flow switch must be installed in the horizontal
piping of the supply (evaporator inlet) water line to avoid
evaporator freeze-up under low or no flow conditions.
The flow switch is supplied by the factory as an installed
component or a field-installed kit shipped along with the
unit. (See page 16 for more information.)

NOTICE
Units with the optional pump package include the strainer and
flow switch.
• Piping for units with brazed-plate evaporators must have
a drain and vent connection provided in the bottom of
the lower connection pipe and to the top of the upper
connection pipe respectively, see Figure 12. These
evaporators do not have drain or vent connections due to
their construction.

IOM 1359-1 13 WWW.DAIKINAPPLIED.COM

Application Consideration

Inlet Strainer Guidelines Figure 14: Factory Installed Strainer

An inlet water strainer kit must be installed in the chilled water

piping before the evaporator inlet. Several paths are available to
meet this requirement:
1. A factory installed option.
2. A field-installed kit shipped-loose with the unit that consists
of:
• Y-type area strainer with 304 stainless steel perforated
basket, Victaulic pipe connections and strainer cap.
• Extension pipe with two Schrader fittings that can be used
for a pressure gauge and thermal dispersion flow switch.
The pipe provides sufficient clearance from the evaporator
for strainer basket removal.
• 0.5-inch blowdown valve
• Two grooved clamps
Both are sized and with the pressure drop shown on page
24.
3. A field-supplied strainer that meets specification and
installation requirements of the current Installation, Water Flow Limitations
Operation and Maintenance Manual available at
www.DaikinApplied.com. Constant Evaporator Flow
The evaporator flow rates and pressure drops are shown on page
Table 9: Strainer Data 33 for various system designs. The maximum flow rate and
Strainer Size Maximum Factory In- Field Installed pressure drop are based on a 6°F temperature drop. Flow rates
Perforation stalled Option Option above the maximum values will result in unacceptable pressure
Size drops and can cause excessive erosion, potentially leading to
3.0 in 0.063 Y Y failure.
4.0 in 0.063 Y Y The minimum flow and pressure drop is based on a full load
6.0 in 0.063 Y Y evaporator temperature drop of 20°F. Evaporator flow rates
below the minimum values can result in laminar flow causing low
pressure alarms, scaling and poor temperature control.
Figure 13: Strainer Pressure Drop
Variable Evaporator Flow
Reducing evaporator flow in proportion to load can reduce
system power consumption. The rate of flow change should be
a maximum of 10 percent of the flow per minute. For example,
if the maximum design flow is 200 gpm and it will be reduced to
a flow of 140 gpm, the change in flow is 60 gpm. Ten percent of
200 gpm equals 20 gpm change per minute, or a minimum of
three minutes to go from maximum to desired flow. The water
flow through the evaporator must remain between the minimum
and maximum values. If flow drops below the minimum allowable,
large reductions in heat transfer can occur. If the flow exceeds
the maximum rate, excessive pressure drop and erosion can
occur. See “Pressure Drop Data” on page 33 for allowable
pressure drops and flow rates.

DAIKIN APPLIED 14 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Application Consideration

System Water Considerations Operation of the heaters is automatic through the sensing
thermostat that energizes the evaporator heaters for protection
All chilled water systems need adequate time to recognize a load against freeze-up. Unless the evaporator is drained in the winter
change, respond to the change and stabilize to avoid undesirable or contains an adequate concentration of glycol, the disconnect
short cycling of the compressors or loss of temperature control. switch to the evaporator heater must not be open.
In air conditioning systems, the potential for short cycling usually
exists when the building load falls below the minimum chiller Although the evaporator is equipped with freeze protection,
plant capacity or on close-coupled systems with very small it does not protect water piping external to the unit or the
water volumes. Some of the things the designer should consider evaporator itself if there is a power failure or heater burnout, or if
when looking at water volume are the minimum cooling load, the the chiller is unable to control the chilled water pumps. Use one
minimum chiller plant capacity during the low load period and the of the following recommendations for additional freeze protection:
desired cycle time for the compressors. Assuming that there are 1. If the unit will not be operated during the winter, drain the
no sudden load changes and that the chiller plant has reasonable evaporator and chilled water piping and flush with glycol.
turndown, a rule of thumb of “gallons of water volume equal to
2. Add a glycol solution to the chilled water system. Burst
two to three times the chilled water gpm flow rate” is often used.
protection should be approximately 10°F below minimum
A storage tank may have to be added to the system to reach the
design ambient temperature.
recommended system volume. Refer to AG 31-003 for method of
calculating “Minimum Chilled Water Volume”. 3. Insulate the exposed piping.
The water quality provided by the owner/occupant/operator/user 4. Add thermostatically controlled heat by wrapping the lines
to a chiller system should minimize corrosion, scale buildup, with heat tape.
erosion, and biological growth for optimum efficiency of HVAC When glycol is added to the water system for freeze protection,
equipment without creating a hazard to operating personnel or the refrigerant suction pressure will be lower, cooling
the environment. Strainers must be used to protect the chiller performance less, and water side pressure drop greater.
systems from water-borne debris. Daikin Applied will not be
responsible for any water-borne debris damage or water side
damage to the chiller heat exchangers due to improperly treated
Chilled Water Pump
water. It is important that the chilled water pumps be wired to, and
controlled by, the chiller’s microprocessor. When equipped with
Water systems should be cleaned and flushed prior to chiller
the optional dual pump output, the chiller controller has the
installation. Water testing and treatment should be verified during
ability to remotely send a signal to the pump relay to start pump
initial chiller installation/commissioning and maintained on a
A or B, or automatically alternate the pump selection, as well
continuous basis by water treatment professionals (see Limited
as enable standby operation. The controller will energize the
Product Warranty).
pump whenever at least one circuit on the chiller is enabled to
run, whether there is a call for cooling or not. This helps ensure
CAUTION
proper unit start-up sequence. The pump will also be turned on
The improper use of detergents, chemicals, and additives in the when the water temperature goes below the Freeze Setpoint for
chiller system water may adversely affect chiller performance longer than a specified time to help prevent evaporator freeze-up.
and potentially lead to repair costs not covered by warranty. See the Field Wiring Diagram for connection points.
Any decision to use these products is at the discretion of the
owner/occupant/operator/user as such they assume full liability/ CAUTION
responsibility for any damage that may occur due to their use.
Adding glycol or draining the system and flushing with an
adequate concentration of glycol are the recommended methods
Evaporator Freeze Protection of freeze protection. If the chiller does not have the ability to
Evaporator freeze-up can be a concern in the application of control the pumps and the water system is not drained or does
air-cooled water chillers in areas experiencing below freezing not have adequate glycol in temperatures below freezing,
temperatures. To protect against freeze-up, insulation and an catastrophic evaporator failure may occur.
electric heater are furnished with the evaporator. All models Failure to allow pump control by the chiller may cause the
have an external plate heater and thermostat. These heaters following problems:
help protect the evaporator down to -20°F (-29°C) ambient air
temperature. The evaporator heater cable is factory wired to 1. If the chiller attempts to start without the building
the 115 volt control circuit transformer in the control box. A 115V automation enabling the pump, the chiller will lock out on
power source for the heater and controls may also be supplied the No Flow alarm and require manual reset.
from a separate power feed to maximize unit protection if desired. 2. If the chiller evaporator water temperature drops below the
Refer to the field wiring diagram for additional information on “Freeze setpoint” the chiller will attempt to start the water
supplying a separate 115V power feed. pumps to avoid evaporator freeze. If the chiller does not
have the ability to start the pumps, the chiller will alarm due
to lack of water flow.
3. If the chiller does not have the ability to control the pumps
and the water system is not to be drained in temperatures

IOM 1359-1 15 WWW.DAIKINAPPLIED.COM

Application Consideration

below freezing or contain glycol, the chiller may be subject Glycol Solutions
to catastrophic evaporator failure due to freezing. The
freeze rating of the evaporator is based on the evaporator The use of glycol may impact system performance depending on
heater and pump operation. The external brazed plate its concentration and should be considered during initial system
heater itself may not be able to properly protect the design. When glycol is added to the chilled water system for
evaporator from freezing without circulation of water. freeze protection, recognize that the refrigerant suction pressure
will be lower, cooling performance less, and water side pressure
drop will be higher. The reduction in performance depends upon
Flow Switch the glycol concentration and temperature.
All chillers require a chilled water flow switch to check that there
Test coolant with a clean, accurate glycol refractometer to
is adequate water flow through the evaporator and to shut the
determine the freezing point.
unit down if necessary to avoid evaporator freeze-up under low
or no flow conditions. A factory-included thermal dispersion flow CAUTION
switch will be installed on packaged models.
The installed glycol level must align with the rated glycol
Installation should be per manufacturer’s instructions included percentage indicated on the submitted chiller technical data
with the switch. Flow switches should be calibrated to shut off the sheet. Failure to adhere to the rated glycol percentage may
unit when operated below the minimum listed flow rate for the result in unit damage and loss of unit warranty.
unit. Flow switch installation and calibration is further discussed
on page 82.
CAUTION
Figure 15: Flow Switch Do not use an automotive-grade antifreeze. Industrial grade
glycols must be used. Automotive antifreeze contains inhibitors
which will cause plating on the copper tubes within the chiller
evaporator. The type and handling of glycol used must be
consistent with local codes.

Low Ambient Operation

Compressor staging is adaptively determined by system load,
ambient air temperature, and other inputs to the MicroTech
unit control. The standard minimum ambient temperature is
32°F (0°C). A low ambient option allows operation down to -4°F
(-20°C). The minimum ambient temperature is based on still
conditions where the wind is not greater than 5 mph. Greater
wind velocities will result in reduced discharge pressure,
increasing the minimum operating ambient temperature. Field
installed louvers are available and recommended to help allow
the chiller to operate effectively down to the ambient temperature
for which it was designed.
There is also a set of switch contacts on the switch that can be
used for an indicator light or an alarm to indicate when a “no flow” High Ambient Operation
condition exists. Freeze protect any flow switch that is installed
outdoors. Differential pressure switches are not recommended for Trailblazer units for high ambient operation (105°F to 125°F,
outdoor installation. They can freeze and not indicate a no-flow 40°C to 52°C) require the addition of the optional high ambient
conditions. package that includes a small fan with a filter in the air intake to
cool the control panel. All units with the optional low ambient fan
control automatically include the high ambient option. Note that in
cases of high ambient temperature, capacity could be reduced or
the lowest leaving water temperature settings may be outside of
the chiller operating envelope; consult with a Daikin Applied sales
representative to ensure chiller is capable of the required lift.

DAIKIN APPLIED 16 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Application Consideration

Condenser Coil Options and Coating

Considerations
The standard coils on the Trailblazer chiller are an all aluminum
alloy microchannel design with a series of flat tubes containing
multiple, parallel flow microchannels layered between the
refrigerant manifolds. The microchannel coils are designed to
withstand 1000+ hour acidified synthetic sea water fog (SWAAT)
test (ASTM G85-02) at 120°F (49°C) with 0% fin loss and
develop no leaks.
Epoxy coating is a water-based extremely flexible and durable
polymer coating uniformly applied to all coil surfaces through
a multi-step, submerged electrostatic coating process. Epoxy
coated coils provide a 10,000+ hour salt spray resistance per
ASTM B117-90, applied to both the coil and the coil headers. The
epoxy coated coils also receive a UV-resistant urethane top-coat
to provide superior resistance to degradation from direct sunlight.
This coil coating option provides the best overall protection
against corrosive marine, industrial or combined atmospheric
contamination to provide extended longevity.

Table 10: Coil/Coating Selection Matrix

Combined
Non-Cor- Unpollut-
Coil Option Industrial3 Marine-In-
rosive1 ed Marine2
dustrial4

Standard
Microchan- +++ - - -
nel
Epoxy Coat-
+++ +++ +++ ++
ed Coils
NOTE: 1. Non-corrosive environments may be estimated by
the appearance of existing equipment in the immediate
area where the chiller is to be placed.
2. Marine environments should take into consideration
proximity to the shore as well as prevailing wind
direction.
3. Industrial contaminants may be general or localized,
based on the immediate source of contamination (i.e.
diesel fumes due to proximity to a loading dock).
4. Combined marine-industrial are influenced by
proximity to shore, prevailing winds, general and local
sources of contamination.

IOM 1359-1 17 WWW.DAIKINAPPLIED.COM

Pump Package

Pump Package
Figure 16: Pump Package Components

Table 11: AGZ-F Pump Package Component Locations

No. Component Description No. Component Description

1 Vertical Pump(s) - Single or Dual 7 Chilled Water Outlet
2 Evaporator Flow Switch 8 Inlet Suction Guide
3 Brazed-Plate Evaporator 9 Chilled Water Inlet
4 Temperature Sensor 10 “Y” Type Inlet Strainer/Drain Port
5 Pump Pressure Gauges 11 Butterfly Valve
6 Triple Duty Outlet Valve

DAIKIN APPLIED 18 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Pump Package

Standard Components of Pump • Flow switch mounted and wired

• Interconnecting piping with grooved couplings
Packages • Insulation of all cold surfaces
Factory-installed pump packages provide important benefits:
• Simplify the chilled water system design and installation
Optional Components
• Provide installation savings by reducing field piping, wiring,
(Factory or Field Supplied)
and control costs • Water pressure gauges on pump suction and discharge
• Save valuable floor space inside the building • Expansion tank with size increments from 4.4 to 90 gallons,
• Reduce project engineering content field installed (some sizes can be factory mounted)
• Greatly reduce pump operating cost with the optional • Air separator with air vent, field installed
variable flow pump Variable Frequency Drive (VFD) • Flex piping connections, field installed
• Storage tanks - vertical, insulated (150, 300, 600, 1000)
Pump Design Features
Pump packages may be single or dual pump arrangement. Each
pump is a vertical, in-line, radially split-case pump with a single Pump Operating Control
spring inside mechanical seal with carbon against silicon carbide
faces. Each case is cast iron. Impellers are bronze, trimmed to Constant Flow
design conditions and then balanced. The shaft sleeve is bronze, The pumps will run at constant speed and will start and stop
extending the full length of the seal area. automatically with the chiller unit. When the chiller is enabled to
Dual pumps are mounted in a common casing with a common run by having its MicroTech unit controller in the Auto state or by
inlet connection and outlet connection. The pumps are designed a signal from a BAS (not necessarily with compressors running
for duty/standby, not parallel operation, and is capable of having based on availability of a cooling load), the pump panel will
one side running at one time. A flapper valve on the discharge receive a signal to start from the chiller controller when either the
side of the casing is flipped over to the side by the moving water chilled water leaving or entering temperature reaches the chiller
to prevent recirculation when only one pump is operating. freeze point setting to help prevent freeze up. When there is
sufficient flow to close the flow switch within a timed period (recirc
The servicing of one side of the pump will require the following:
timer), a proof-of-flow signal is sent to the chiller and the pump is
A. to stop running the pump in the Run state. If there is a call for cooling based on the chilled
B. remove the one rotating head water temperature, the chiller will commence its compressor
startup procedure. If there is no call for cooling, the chiller will be
C. install a gasket and blanking plate on one side of the pump on stand-by waiting for load.
casing
If the flow switch does not see flow, the pump remains in the Start
D. start the pump back up with the one rotating head and the state until flow is established, at which time the pump will be in
defective one can be serviced the Run state. Flow is recognized when the flow switch indicates
For all pump arrangements, each pump is serviceable without flow for longer than the recirc timer setpoint.
breaking pipe connections. The motor and pump rotating The Run state is a control condition established by satisfying
assembly can be serviced without removing the pump casing certain conditions. The Start state means that a digital signal has
from the line. been sent to the pump for it to start running.
Pump performance curves are generated by Daikin Tools for When starting the chiller, it is prudent to be sure there is flow so
the specific criteria of the installation. Contact a Daikin Applied the chiller compressors will be able to start based on a call for
representative for this information. cooling due to high chilled water temperature. Observing water
Pumps and pump package components are not heat traced and pressure gauges can confirm flow.
may require additional freeze protection measures. Flow interruption will open the flow switch, sending a signal to the
chiller to shut down and also de-energize the pump. If the chiller
Additional Factory Provided Components is turned off, the pump will shut off after a timed period to allow
• “Y” type inlet strainer (shipped loose) water circulation during refrigerant pumpdown.
• Combination triple-duty outlet valve having a drip-tight
discharge shutoff valve, non-slam check valve, and flow
throttling valve (shipped loose)
• Combination suction guide with flow stabilizing outlet vanes
and stainless steel strainer with a disposable fine-mesh
strainer for start-up
• Factory power and control wiring from the AGZ-F chiller to
the pump package control panel

IOM 1359-1 19 WWW.DAIKINAPPLIED.COM

Pump Package

Variable Flow with Pump VFD Figure 17: Pump Control Curve

The operating cost savings resulting from using variable chilled

water flow via a pump variable frequency drive (VFD) is well
known. In the past, however, its usage has been somewhat
limited by the cost and uncertainty of field installing the required
system pressure differential sensors. Daikin Applied offers a
variable chilled water flow system, completely self-contained
within the pump package, by simply ordering the optional pump
VFD and no external sensors are required when operating in
Sensorless Pressure Control.
There are four pump operating modes available with the optional
factory-installed variable flow VFD is selected on the pump
package is equipped with the VFD option:
1. Sensorless Pressure Control (default setting)
2. BAS Control
3. Remote Sensor Control Previously, a differential pressure sensor was placed at the
4. Locally Selected Constant Speed Control most remote load, across the supply piping and return piping
encompassing the valve and coil set, as common practice for
system energy efficiency. Sensorless control can replicate this
Sensorless Pressure Control control without the need for that remote sensor. As the flow
Onboard measurements allow control of the pump speed to required by the system is reduced, the pump automatically
optimize chilled water flow with respect to water system pressure. reduces the head developed according to the pre-set control
External pressure sensors are not required, eliminating design curve.
and installation effort. The unit is factory-configured for this mode.
In systems with a remote sensor, it is often found that using
NOTICE a differential pressure sensor to sense the pressure across a
remote load could theoretically result in loads close to the pump
Sensorless operation is only allowed for single chiller systems. being under-pumped. The situation would be where the load at
Systems with parallel chiller operation must use one of the other a loop extremity is satisfied and the control valve closes while
control methods. a load close to the pump needs full flow. The probability of this
The default control mode for Sensorless pumps is ‘Quadratic occurring is remote but it is possible. One answer to this is to
Pressure Control’ where the controller is set to control the speed move the sensor closer to the pump (two-thirds of the way out
according to a ‘control curve’ between max and min flow. The into the system is a popular recommendation) although physically
control curve is designed to replicate sensor positions at varying re-positioning the sensor at commissioning stage can be a costly
distances from the pump based on power, frequency, pressure, exercise. With Sensorless pump control it is possible to replicate
and flow across the flow range of the pump. Speed and pressure the moving of a sensor by adjusting the head setting ‘Hmin’.
are adjusted to match the system load without the need for a
sensor located at the most remote load point. BAS Control
The quadratic measurements enable the pump to continuously The pump speed will be controlled according to the voltage level
identify the head and flow at any point in time which gives from a BAS input signal. The pump control protocol is the same
accurate pressure control without the need for external feedback as ordered from the chiller unit. BAS inputs may be: BACnet MS/
signals such as a remote sensor. Incorporating the pump’s TP or Modbus.
hydraulic data into the controller and removing sensors results in
true integration of all components and removes the risk of remote NOTICE
sensor failure. BACnet Ethernet/IP is currently unavailable.

Remote Sensor Control

The VFD is wired to pressure differential switch(s) mounted in
the chilled water piping system. This is the standard VFD control
when a sensorless VFD is not used.

Locally Selected Constant Speed Control

This mode is selected by pressing the Hand On key. Operation
of the pump at a constant speed as selected on the VFD control
panel. This mode allows selecting a pump speed to match the
system curve.

DAIKIN APPLIED 20 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Pump Package

Isolator Information In all cases, set the unit in place and level. If anti-skid pads are
used, do not use hold down bolts. If hold down bolts are used, do
not use anti-skid pads.
Figure 18: Spring Isolator
ELASTOMERIC
When spring isolators are required, install springs running under
SNUBBER the main unit supports. Unit should be installed on blocks or
shims at the listed free height. Isolator springs should not be
loaded until the installation is complete, then adjust the springs to
3
[76.2]
.62 [15.8]
the vendor listed compression for the load point. When securing
the isolator, do not over-tighten the mounting bolts. Over-
tightening may result in cracking of the cast isolator housing and
9.25 [235.0] will have a negative impact on the isolation effect.
10.5 [266.7]
Installation of spring isolators requires flexible piping connections
.625
7.75 [196.9]
and at least three feet of flexible electrical conduit to avoid
.5 [12.7] DIA.
[15.9] POSITIONING
.25 TO .5 GAP
straining the piping and transmitting vibration and noise.
PIN
Neoprene waffle pads, supplied by customers, should be
[6.4 to 12.7]

ADJ. BOLT mounted at the defined mounting point locations along the full rail
6.25 length.
[127.0]
FREE HT. Contact a Daikin Applied sales representative for isolator
information related to units with other fin materials.
5\X [127.0]
OPER. HT.

Pump Controller
.56 [14.3]

.25 [6.4]
ELASTOMERIC PAD

Pump Start Control

Figure 19: Rubber-in-Shear (RIS) Isolator
The standard arrangement is for the MicroTech unit controller
pump output signal to automatically start and stop the pump(s).
The methods and settings are discussed in “Evaporator Pump
Control” on page 48.
Details on pump package installation and application
considerations begin on page 18.

Pump VFD Operation

The VFD constantly monitors the chilled water system’s state.
When the building cooling load drops, air side controls will start
to close in order to control the space temperature. At that instant
in time, the pump power draw will start to drop. The drive will
notice this and slow down the pump (Hz output will decrease)
which then triggers a decrease in flow and head since the pump
impeller rpm is dropping.
The reverse is true when the load increases (valves open). The
power draw will increase and the drive will speed up (Hz goes up)
and the flow and head increases.
Both flow and head will fluctuate and since they are being read
instantaneously, as opposed to an averaged value, even the
slightest change is registered on the screen.
A building’s cooling load tends to change slowly and it may be
difficult to discern load changes by merely observing the VFD
display. However, the pump rpm, Hz and kW can be noted over
time and used for reference. A given building load will have a
discrete reading.

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Pump Package

Operating the VFD Controller Configuring the VFD Controller for

The VFD incorporates an integrated graphic local display and BACnet MS/TP Communication
keypad to select mode, change parameters and view status and 1. Set the basic BACnet MS/TP network parameters using
alarms. the VFD graphical interface. The BACnet MS/TP Network
The unit is shipped in the sensorless mode. If this mode is to be Configuration Parameters for the Pump VFD are located
used, no programming is required. below in Table 13. It is recommended that additional
parameters available in menu 8-* should remain at factory
defaults. See VFD installation manual for further details
BAS Integration of Pumps (available on www.DaikinApplied.com).
The pump VFD can be integrated to a BAS via BACnet® MS/ 2. Cycle power to the VFD controller for changes to take
TP or Modbus network protocols. The appropriate MicroTech effect.
communication module must be selected as a factory-installed 3. The VFD controller is now ready for network configuration
option on the AGZ-F chiller. The VFD pump controller ships from from the BAS. Refer to the BACnet Operations Manual
the factory with an attached communication card that matches for the AGZ-F VFD Controller, which is available on www.
the communication module selected with the chiller. The pump DaikinApplied.com, for a complete points list and additional
VFD controller is a native BACnet protocol device. The VFD configuration information.
controller comes with an additional communication card for
Modbus. Note that while BACnet IP is offered as a factory-
Table 13: BACnet MS/TP Network Configuration Parameters
installed option on the AGZ-F chiller, BACnet IP is not offered
on the VFD frequency converter. If a chiller unit is ordered with Parameter Setting for BACnet; Note Default Value
BACnet IP, the VFD will be provided with BACnet MS/TP. Option A [3]; During initial pow-
FC Port [1]
Network parameters are set using the VFD controller graphical er-up, the frequency converter
Note: This param-
8-02 Control automatically sets this param-
interface. The following sections describe the parameters that are Source eter to Option A [3] if it detects
eter cannot be
required to enable communications from the VFD pump directly adjusted while the
a valid fieldbus option installed
motor is running.
to the BAS via BACnet MS/TP or Modbus. Selecting a specific in slot A
communication protocol changes various default parameter Digital and control
8-30 Protocol BACnet
settings to match that protocol’s specifications along with making word
additional protocol-specific parameters available from the BAS. 0-127; This value must be
8-31 Address unique throughout the MSTP FC RS485
trunk
VFD Network Integration 9600/19,200/38,400/76,800
Use the VFD controller’s graphical interface to set unit baud;
8-32 Baud
parameters and factory defaults for unit setpoints. Network All devices on the MSTP trunk 9600 baud
Rate
must be set to the same baud
configuration involves: 1) selecting the Control Protocol for rate
BACnet or Modbus, and 2) then setting the specific network 8-70 BACnet 0-4194304; This value must be
parameters as required by each protocol. Device In- unique throughout the entire 1
stance BACnet network.
The comprehensive set of network parameters available from the
VFD pump to the BAS (i.e. point lists) are provided in separate 8-72 MS/TP 1-127; Dependent on the Num-
127
Max Masters ber of Masters in the system
AGZ-F VFD Pump Controller Operations Manuals for each
1-65534; Defines how many
protocol. These point lists can be found on www.DaikinApplied. 8-73 MS/
info/data frames the device is
com in MicroTech Unit Controls literature. For questions TP Max Info 1
allowed to send while holding
Frames
regarding the VFD pump operation and set up, please contact the token
the chiller Technical Response Center (TRC).

NOTICE
AGZ-F chiller VFD controllers support only BACnet MS/TP and
Modbus communications. Daikin Applied does not support other
protocol options that may be offered by the VFD manufacturer.

DAIKIN APPLIED 22 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Pump Package

Configuring the VFD Controller for Table 14: Modbus Network Parameters
Modbus Communication Parameter Value (Range)/Definition Default Value
8-02 Control
The VFD controller (frequency controller) is a native Modbus FC Port [1]/ On-board RS-485 port FC Port [1]
Source
device. In other words, it does not require any additional
Modbus RTU [2]/The protocol set-
communication card or other hardware for integration into a 8-30 Protocol
ting for the communication port
FC [0]
building automation system (BAS) via the Modbus network. The 1-247/The Modbus Address of
configuration process is described in the following section. It is VFD; this address must be unique
8-31 Address 1
assumed that the user is familiar with Modbus technology and throughout the entire Modbus
terminology. network.
2400 - 115200/This value should
Standard Modbus network rules apply. The network is a daisy- 8-32 Baud Rate be set the same as all other devic- 9600 baud [2]
chain of unit controllers including the master (in this case, the es on the trunk.
BAS) and all slaves (VFD controller). The Modbus standard Even parity, 1 stop bit [0]; Odd
recommends that the network be terminated on each end with 8-33 Parity/
Parity, 1 Stop Bit [1]; No Parity,
Even parity, 1
the characteristic impedance of the network (about 120 ohms). 1 Stop Bit [2]; No Parity, 2 Stop
Stop Bits stop bit [0]
Bits [3]/Set to match the network
Follow the guidelines stated in the Modbus specifications.
settings

Steps for Modbus Configuration NOTE: Remaining items in menus 8-* should likely remain at factory defaults. See
VFD installation manual for further details.
Table 14 defines the network parameters of the Modbus
Communication Module that are available via the graphical Figure 20: Modbus RTU Connection
interface. The Modbus network address and data transmission
rate (Baud Rate) are available via the local control panel. At
a minimum, you must set the network address and verify the
correct baud rate before establishing network communication
between the VFD controller and the BAS. Change remaining
parameters as required for your network.
1. Set the Modbus network parameters as described in Table
14. It is recommended that remaining items in menus 8-*
remain at factory defaults. See VFD installation manual,
available on www.DaikinApplied.com for further details.
2. Cycle power to the VFD controller for changes to take
effect.
3. Verify connection from BAS to VFD - terminals 68 (+) and
69 (-) on the main control board of the frequency converter.
4. The VFD controller is now ready for network configuration
from the BAS. Refer to the Modbus Operations Manual
for the AGZ-F VFD Controller, which is available on www.
DaikinApplied.com, for a complete points list and additional
configuration information.

IOM 1359-1 23 WWW.DAIKINAPPLIED.COM

Remote Evaporator

Remote Evaporator NOTICE

Service Form SF99006 (current version available from the local
sales office) must be submitted to Daikin Applied Technical
Refrigerant Piping and Application Response Center and reviewed at least two weeks prior to
AGZ-F units have two circuits, each with either tandem or trio beginning piping installation.
compressors. These circuits must be kept separate throughout Refrigerant piping design must be provided by a qualified HVAC
the entire refrigerant piping system. Pipe all lines (suction, liquid, Design Engineer familiar with piping design, as well as local
and hot gas bypass, if used) of each evaporator circuit to the codes and regulations. The manufacturer recommendations
corresponding circuit on the outdoor unit. Evaporator circuit #1 provided here are to be used as a general guide, and do not
must be piped to the circuit #1 condensing unit. Evaporator circuit replace system design by a qualified professional. All field piping,
#2 must be piped to the circuit #2 condensing unit. Be careful not wiring, and procedures must be performed in accordance with
to cross-pipe any lines. ASHRAE, EPA, local codes, and industry standards.

CAUTION Proper refrigerant piping can make the difference between a

reliable system and an inefficient, problematic system. See the
Refrigerant circuits must be kept isolated from each other
recommended field pipe sizes shown in Table 19 and Table 20
throughout the entire system. Note that the connection locations
on page 28. For additional information about refrigerant piping
vary by model size, see Figure 21.
techniques and sizing, see the Daikin Applied Refrigerant Piping
Braze connections on evaporator are stainless steel so a Design Guide, AG 31-011, which is found on www.DaikinApplied.
minimum of 40% silver braze rod must be used. com.
The primary concerns related to piping are refrigerant pressure
Figure 21: Connection Locations drop, an adequately subcooled liquid feed to the expansion
valves, continuous oil return, and properly sized refrigerant
specialties. AGZ-F unit performance is negatively affected by
suction line pressure drop losses. The distance between the
AGZ-F condensing unit and the remote evaporator should be
kept as short as possible to minimize the performance derate.
Underground refrigerant piping is not permitted.

WARNING
Improper installation can cause refrigerant migration, flood back,
oil loss, line corrosion, or mechanical failures.

CAUTION
Glycol is not allowed to be used in AGZ-F remote evaporator
installations.
For installations where the evaporator is installed either above or
below the unit - the following recommendations apply:

Evaporator installed below outdoor unit:

Performance Adjustments Due to Piping
• 30 ft maximum measured vertical distance, 75 ft maximum
Performance will be impacted by the equivalent feet of piping
vertical equivalent length
between the condensing unit and the evaporator. To determine
the adjusted unit capacity, power, and efficiency, refer to DST • Only single riser suction tubing is to be used - Double riser
Trailblazer selection software. installations are not permitted
• A suction line trap must be installed at the bottom of the
Piping Recommendations riser and a second trap at 20 ft height

NOTICE Evaporator installed above outdoor unit:

Refrigerant piping information for this manual has changed to • 30 ft maximum measured vertical distance, 75 ft maximum
reflect only Microchannel coils. vertical equivalent length is required to prevent loss of liquid
subcooling
New refrigerant piping must be used for all equipment
installations. Refrigerant piping must be properly sized for the
circuit capacity and unit refrigerant. Piping system must be
brazed and have the proper lay out with all required components.

DAIKIN APPLIED 24 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Remote Evaporator

Table 15: Remote Evaporator Piping Limitations Table 18: Additional Oil Charge
SE 002-004 SE 006-014
Piping Restriction Suction Line Suction Liquid Line Liquid
HE 002-006 HE 008-014
Diameter Addition (oz/ft) Diameter Addition (oz/ft)
Maximum measured actual piping
distance between the unit and the 90 ft 150 ft 7/8 0.002 7/8 0.060
remote evaporator 1 1/8 0.003 1 1/8 0.103
Maximum total equivalent feet of
distance between the unit and 1 3/8 0.005 1 3/8 0.156
150 ft 300 ft
evaporator including friction losses of 1 5/8 0.007 1 5/8 0.221
elbows and traps
2 1/8 0.012 2 1/8 0.385

NOTICE 2 5/8 0.018 2 5/8 0.594

Horizontal sections of the suction lines must be downward 3 1/8 0.026 3 1/8 0.848
sloping toward the compressor with 1 inch slope per 10 foot of
piping run to assist oil return. Additional Piping Installation Guidelines
The brazed-plate evaporators have no charge and are not
Table 16: Fitting Losses Equivalent Feet of Pipe sealed. A holding charge of an inert gas, such as nitrogen,
is provided for the outdoor condensing unit. Holding charges
90° Std. 90° Long must be evacuated prior to the R-32 charging procedure. The
Line Size Angle Globe
Radius Radius
In.OD Valve Valve interconnecting refrigerant piping and the total system refrigerant
Elbow Elbow
charge are field supplied and installed.
7/8 9.0 22.0 2.0 1.4
1 1/8 12.0 29.0 2.6 1.7 CAUTION
1 3/8 15.0 38.0 3.3 2.3
Ensure all isolation valves are shut and not leaking before
1 5/8 18.0 43.0 4.0 2.6
performing a leak test. Failure to do so may result in unit damage
2 1/8 24.0 55.0 5.0 3.3
and loss of unit warranty.
2 5/8 29.0 69.0 6.0 4.1
3 1/8 35.0 84.0 7.5 5.0 After evacuating piping system to 500 microns or below, the
system cannot rise over 300 microns within an hour. Insulate the
SOURCE: ASHRAE 2014 Handbook Refrigeration
suction line to reduce excessive superheat build-up. Insulate the
NOTICE liquid line to prevent loss of subcooling and consequent liquid
flashing.
TEL values for the filter-drier and solenoid valve are already
included and should not be added to the liquid line drop. The use of double risers for vertical gas risers is not allowed.
Size the single vertical riser per Table 19 and Table 20 on page
28. A small trap must be provided at the base of each major
Additional Refrigerant and Oil Charge vertical gas riser to assist in the collection of oil. If vertical risers
Depending on the length of piping needed, additional refrigerant exceed more than 20 feet, install a second trap per guidelines
and oil charge will be needed. See Table 17 and Table 18 for above. Follow ASHRAE procedures and refrigerant piping
specific requirements. guidelines. Exceeding these recommendations will decrease
performance and could impact system reliability.
Table 17: Additional R-32 Line Charge Use caution in sizing the liquid line in applications where the
evaporator is above the outdoor section. The weight of the liquid
Suction Line Suction Liquid Line Liquid refrigerant in the vertical column will decrease the pressure at
Diameter Addition (oz/ft) Diameter Addition (oz/ft)
the top of the riser (approximately 0.5 psi per foot of vertical
7/8 0.09 7/8 3.01 rise) allowing some of the refrigerant to flash to a gas. Adequate
1 1/8 0.16 1 1/8 5.14 refrigerant subcooling is needed at the outdoor section to prevent
1 3/8 0.24 1 3/8 7.82 refrigerant gas at the expansion valve.
1 5/8 0.34 1 5/8 11.07 Care should be taken while designing piping system to avoid the
draining of condensed refrigerant to the lower component when
2 1/8 0.59 2 1/8 19.26
normal shut-down procedures do not occur (such as a power
2 5/8 0.90 2 5/8 29.70 failure).
3 1/8 1.29 3 1/8 42.40

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Remote Evaporator

Refrigerant Specialties Kit

Figure 22: Specialties Kit Components

Remote evaporator units include a Refrigerant Specialties Kit The liquid line filter drier must be installed at the remote
which supplies the following field-installed components: evaporator, upstream of the liquid solenoid valve and expansion
valve.
• Expansion Valves
• Liquid Line Solenoid Valve and DIN Connector • Install a ball valve before and after the filter drier
• Liquid Line Filter Drier with Filter Drier Core and Clamp • Only charging valve installed for remote evap. is on suction
line
• Liquid Line Sight Glasses
• Use schrader fitting on ball valves before and after filter
• Liquid Line Ball Valves
drier to maeasure pressure drop
• Charging Valve
• Suction Line Temperature Sensor Tube Hot Gas Bypass Applications
• Schrader and Schrader Core for Suction Line Transducers Provide condenser fan VFDs for applications when operation
• Suction Pressure Transducer below 32°F ambient is expected and hot gas bypass is desired.
• Check Valve for Hot Gas Bypass Line (specific installation This is necessary to maintain adequate condensing pressures
requirements) and liquid refrigerant at the expansion valve when condenser
capacities are at their minimum.
Field Installed Component Locations Referencing the refrigerant piping schematics, the solenoid valve
The following components must be installed adjacent to the and hot gas bypass valve need to be as close to the condensing
remote evaporator. unit as possible.
The expansion valves must be installed within 12 inches of the If at the same elevation or if evaporator is below the condensing
evaporator inlet connection and the outlet piping of the expansion unit, the hot gas bypass piping must be downward sloping toward
valve must go directly into the evaporator with no bends in the evaporator with a 1inch drop per 10 ft of piping run in the
between. direction of flow.
The liquid line solenoid valves must be installed within 3 ft of If the evaporator is above the condensing unit, add a check
the evaporator. The liquid line solenoid valve cable must be valve in the hot gas bypass piping at the evaporator to prevent
connected to the solenoid valve using a junction box to extend refrigerant condensing in the line, which results in loss of
the wiring to the length required to reach the solenoid. subcooling.

DAIKIN APPLIED 26 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Remote Evaporator

Table 19: Remote Evaporator Recommended Line Sizes - Standard Efficiency Models
Liquid Size
Suction Line Size Recommendation
Recommendation
Unit Model Fans Compressor Up to 50 Up to 75 Up to 100 Up to 125 Up to 150 Up to 200 Up to 250 Up to 300
All Equiv ft
Equiv. ft Equiv. ft Equiv. ft Equiv. ft Equiv. ft Equiv. ft Equiv. ft Equiv. ft
Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2

AGZ002F 2 DDNNDDNN 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8

AGZ002F 2 GGNNFFNN 7/8 7/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8

AGZ002F 2 GGNNGGNN 7/8 7/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8

AGZ004F 4 JJNNHHNN 7/8 7/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 3/8

AGZ004F 4 JJNNJJNN 7/8 7/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8

AGZ004F 4 LLNNJJNN 1 1/8 7/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8

AGZ004F 4 LLNNLLNN 1 1/8 1 1/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8

AGZ004F 4 LPNNLLNN 1 1/8 1 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8

AGZ004F 4 LPNNLPNN 1 1/8 1 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8

AGZ006F 6 SPNNLLNN 1 1/8 1 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8

AGZ006F 6 SSNNLLNN 1 1/8 1 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8

AGZ006F 6 SUNNLLNN 1 3/8 1 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

AGZ006F 6 SVNNLPNN 1 3/8 1 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

AGZ006F 6 UUNNLPNN 1 3/8 1 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

AGZ008F 8 SUNNSUNN 1 3/8 1 3/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

AGZ008F 8 UUNNSUNN 1 3/8 1 3/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

AGZ008F 8 UUNNUUNN 1 3/8 1 3/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

AGZ010F 10 VVNNUUNN 1 5/8 1 3/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

AGZ010F 10 SVSNSSSN 1 5/8 1 3/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 3 1/8 2 5/8

AGZ010F 10 SVVNSSSN 1 5/8 1 3/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8

AGZ012F 12 SVVNSSVN 1 5/8 1 5/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8

AGZ012F 12 SVVNSVVN 1 5/8 1 5/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8

AGZ014F 14 VVVNUUUN 1 5/8 1 5/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8

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Remote Evaporator

Table 20: Remote Evaporator Recommended Line Sizes - High Efficiency Models
Liquid Size
Suction Line Size Recommendation
Recommendation
Unit Model Fans Compressor Up to 50 Up to 75 Up to 100 Up to 125 Up to 150 Up to 200 Up to 250 Up to 300
All Equiv ft
Equiv. ft Equiv. ft Equiv. ft Equiv. ft Equiv. ft Equiv. ft Equiv. ft Equiv. ft
Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2 Cir. 1 Cir. 2

AGZ004F 4 DDNNDDNN 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8

AGZ004F 4 GGNNFFNN 7/8 7/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8

AGZ004F 4 GGNNGGNN 7/8 7/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8

AGZ006F 6 JJNNHHNN 7/8 7/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8

AGZ006F 6 JJNNJJNN 7/8 7/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8

AGZ006F 6 LLNNJJNN 1 1/8 7/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 2 1/8 1 5/8 2 1/8 1 5/8 2 1/8 1 5/8

AGZ006F 6 LPNNJJNN 1 1/8 7/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8

AGZ006F 6 PPNNJJNN 1 1/8 7/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8

AGZ006F 6 PPNNLLNN 1 1/8 1 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8

AGZ008F 8 LPNNLPNN 1 1/8 1 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8

AGZ008F 8 PPNNLPNN 1 1/8 1 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8

AGZ008F 8 PSNNPSNN 1 1/8 1 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8

AGZ008F 8 SSNNSSNN 1 1/8 1 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8

AGZ010F 10 SUNNSSNN 1 3/8 1 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

AGZ010F 10 UUNNSSNN 1 3/8 1 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

AGZ010F 10 UUNNSUNN 1 3/8 1 3/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

AGZ012F 12 UUNNUUNN 1 3/8 1 3/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

AGZ012F 12 VVNNUUNN 1 5/8 1 3/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

AGZ012F 12 VVNNVVNN 1 5/8 1 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

AGZ014F 14 SSVNSSSN 1 5/8 1 3/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 3 1/8 2 5/8

AGZ014F 14 UUUNSSSN 1 5/8 1 3/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8

AGZ014F 14 SVVNSSVN 1 5/8 1 5/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8

DAIKIN APPLIED 28 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Remote Evaporator

Wiring for Remote Evaporators

NOTICE
Condensing unit electrical information should be based on the packaged chiller and can be found beginning on page 35.

Figure 23: Remote Evaporator Sensor Box Wiring

Table 21: Remote Evaporator Wiring Specifications

No. Description
1 Individual wire interconnects (for 120V) - field provided 14 AWG (red x2 ea., white x1 ea., green x1 ea.)
2 18 AWG 2-conductor shield cable (field provided unit evaporator sensor box connect cable - TB03 - TB12 for terminals: EEWT & ELWT
3 18 AWG 3-conductor shielded communications cable for Modbus cable routed to chiller unit controller UC01:FBUS2

NOTICE
All wires in Figure 23 are specified by Daikin Applied and field provided.

IOM 1359-1 29 WWW.DAIKINAPPLIED.COM

Remote Evaporator

Sensor Wiring Service Pumpdown

The Remote Evaporator AGZ-F units come with sensors wired to The service pumpdown capacity of AGZ units with microchannel
the remote evaporator sensor box, including the following: condenser coils is less than models with tube and fin coils. Care
• Evaporator Water Inlet and Outlet Temperature Sensor should be exercised to include all equipment and lines when
calculating the system charge relative to the unit’s pumpdown
• Suction Line Temperature Sensors for Piping at the
(storage) capacity.
Evaporator for both Circuit #1 and #2
• Suction Transducer Wiring for Installation on Evaporator While the AGZ-F remote evaporators have an insignificant
Suction Piping for both Circuit #1 and #2 operating charge, the amount of refrigerant in interconnecting
refrigerant piping can be considerable.
• Liquid Line Solenoid Valves are supplied as part of the
Refrigerant Specialties Kit with a DIN connector Due to the decreased refrigerant capacity of microchannel
Field wiring from the unit mounted sensor box (Figure 24) to the condenser coils, isolating refrigerant charge in the condenser is
remote evaporator sensor box (Figure 25) is required. All wires not recommended for remote evaporator applications.
between the unit control box and the remote sensor box are
WARNING
Daikin Applied specified and field provided, as shown in Figure
23. Failure to follow condenser volume limits when isolating
refrigerant charge in the condenser may result in unit damage,
All wiring should be run in conduit as required by local and personal injury, and unintentional loss of refrigerant to
national code. See Field Wiring Diagram included in unit, or atmosphere if condenser refrigerant volume exceeds published
Figure 26 for wiring schematic. capacity limits.
It is mandatory that the liquid line solenoid valve be located close
Figure 24: Unit-Mounted Sensor Box Wiring
to the evaporator so that pumpdown does not have to remove
and store a large quantity of liquid refrigerant from the liquid line.

Figure 25: Remote Evaporator Sensor Box

DAIKIN APPLIED 30 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Remote Evaporator

Remote Evaporator Field Wiring

Figure 26: Remote Evaporator Wiring Schematic

IOM 1359-1 31 WWW.DAIKINAPPLIED.COM

Remote Evaporator

Figure 27: Remote Evaportator Wiring Schematic (Continued)

DAIKIN APPLIED 32 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Pressure Drop Data

Pressure Drop Data

Evaporator Pressure Drop Data
Table 22: ACK240-DQ Data

Evaporator Evaporator Model Minimum Flow Rate Nominal Flow Rate Maximum Flow Rate
Part
GPM DP ft l/s DP kPa GPM DP ft l/s DP kPa GPM DP ft l/s DP kPa
Number
332955701 ACK240DQ-58AH 36.0 1.3 2.3 4.0 72.0 7.2 4.5 21.6 144.0 32.7 9.1 97.9
332955702 ACK240DQ-66AH 42.0 1.6 2.6 4.7 84.0 7.8 5.3 23.4 168.0 34.4 10.6 102.8
332955703 ACK240DQ-78AH 54.0 2.2 3.4 6.6 108.0 9.7 6.8 29.0 216.0 40.7 13.6 121.6
332955704 ACK240DQ-86AH 60.0 2.4 3.8 7.2 120.0 10.0 7.6 30.0 240.0 41.1 15.1 122.9
332955705 ACK240DQ-98AH 66.0 2.5 4.2 7.4 132.0 9.6 8.3 28.8 264.0 38.0 16.7 113.6
332955706 ACK240DQ-106AH 72.0 2.7 4.5 8.0 144.0 10.0 9.1 29.8 288.0 38.5 18.2 114.9
332955707 ACK240DQ-114AH 66.0 2.1 4.2 6.4 132.0 7.5 8.3 22.5 264.0 28.1 16.7 84.0
332955708 ACK240DQ-122AH 78.0 2.7 4.9 8.1 156.0 9.3 9.8 27.7 312.0 33.9 19.7 101.4
332955710 ACK240DQ-138AH 84.0 2.8 5.3 8.4 168.0 8.9 10.6 26.5 336.0 30.7 21.2 91.9
332955711 ACK240DQ-142AH 90.0 3.1 5.7 9.2 180.0 9.6 11.4 28.7 360.0 33.1 22.7 98.9
332955712 ACK240DQ-154AH 96.0 3.2 6.1 9.6 192.0 9.6 12.1 28.8 360.0 28.5 22.7 85.1
332955713 ACK240DQ-170AH 108.0 3.6 6.8 10.9 216.0 10.3 13.6 30.8 360.0 24.0 22.7 71.6
332955714 ACK240DQ-194AH 120.0 4.0 7.6 11.8 240.0 10.5 15.1 31.3 360.0 19.5 22.7 58.3
332955715 ACK240DQ-210AH 138.0 4.6 8.7 13.8 276.0 11.8 17.4 35.4 360.0 17.5 22.7 52.3
NOTE: Exceeding max flow rates can cause erosion damage to the evaporator.
Each channel count has its own maximum flow rate and the frame itself has an maximum flow rate of 360 GPM.

Table 23: ACK502-DQ Data

Evaporator Evaporator Model Minimum Flow Rate Nominal Flow Rate Maximum Flow Rate
Part
GPM DP ft l/s DP kPa GPM DP ft l/s DP kPa GPM DP ft l/s DP kPa
Number
332956501 ACK502-DQ-162 150.0 2.9 9.5 8.7 300.0 11.2 18.9 33.4 501.0 30.7 31.6 91.7
332956503 ACK502-DQ-190 168.0 3.3 10.6 9.8 336.0 11.1 21.2 33.0 528.0 25.4 33.3 76.0
332956504 ACK502-DQ-206 192.0 4.0 12.1 11.8 384.0 12.6 24.2 37.8 528.0 22.3 33.3 66.6
332956505 ACK502-DQ-234 204.0 4.2 12.9 12.5 408.0 12.1 25.7 36.2 528.0 18.5 33.3 55.3
332956506 ACK502-DQ-254 216.0 4.5 13.6 13.4 432.0 12.2 27.3 36.6 528.0 16.7 33.3 50.0
NOTE: Exceeding max flow rates can cause erosion damage to the evaporator.
Each channel count has its own maximum flow rate and the frame itself has an maximum flow rate of 360 GPM.

Table 24: ACH1000-DQ Data

Evaporator Evaporator Model Minimum Flow Rate Nominal Flow Rate Maximum Flow Rate
Part
GPM DP ft l/s DP kPa GPM DP ft l/s DP kPa GPM DP ft l/s DP kPa
Number
332956402 ACH1000DQ-166AH 240.0 3.8 15.1 11.3 480.0 13.4 30.3 40.2 801.6 35.6 50.6 106.3
332956452
332956403 ACH1000DQ-178AH 264.0 4.0 16.7 12.0 528.0 14.2 33.3 42.4 881.0 37.3 55.6 111.4
332956453
332956404 ACH1000DQ-182AH 276.0 4.2 17.4 12.6 552.0 14.8 34.8 44.2 881.0 35.7 55.6 106.8
332956454
NOTE: Exceeding max flow rates can cause erosion damage to the evaporator.
Each channel count has its own maximum flow rate and the frame itself has an maximum flow rate of 360 GPM.

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Pressure Drop Data

Table 25: Strainer Pressure Drop (2.5in): P/N 331775460 and

335043702

Flow (gpm) Pressure Drop (ft)

40 0.3
60 0.7
100 2.0
150 4.3
300 16.1

Table 26: Strainer Pressure Drop (3in): P/N 335043703 and

331775463

Flow (gpm) Pressure Drop (ft)

50 0.3
100 1.0
200 3.5
300 8.1
400 16.2

Table 27: Strainer Pressure Drop (4in): P/N 335043704 and

331775465

Flow (gpm) Pressure Drop (ft)

100 0.4
200 1.4
300 2.8
400 5.1
500 7.8
600 11.5
700 16.1

Table 28: Strainer Pressure Drop (6in): 335043706

Flow (gpm) Pressure Drop (ft)

200 0.3
300 0.7
400 1.3
500 1.9
600 2.7
700 3.7
800 4.6

DAIKIN APPLIED 34 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Electrical Data

Electrical Data Power wiring connections to the chiller may be done with either
copper or aluminum wiring, provided the wire size and count fit in
the chiller lugs provided. All wiring must be done in accordance
with applicable local and national codes, including NECA/AA
Electrical Connection 10402012, Standard for Installing Aluminum Building Wire and
Trailblazer units can be ordered with either standard single-point Cable (ANSI). Wiring within the unit is sized in accordance with
power or optional multi-point power connections and with various the NEC®. Refer to the unit nameplate and the unit selection
disconnect and circuit breaker options. Wiring within the unit is report for the correct electrical ratings.
sized in accordance with the NEC®. 1. The control transformer is furnished and no separate 115V
NOTICE power is required. For both single and multi-point power
connections, the control transformer is in circuit #1 with
Wiring, fuse, and wire size must be in accordance with the
control power wired from there to circuit #2. In multi-point
National Electrical Code® (NEC). The voltage to these units must
power, disconnecting power to circuit #1 disconnects
be within ±10% of nameplate voltage (415V units must have
control power to the unit.
voltage within -13% and +6% of nameplate voltage) and the
voltage unbalance between phases must not exceed 2%. Since 2. Wire sizing supplied to the control panel shall be in
a 2% voltage unbalance will cause a current unbalance of 6 to 10 accordance with field wiring diagram.
times the voltage unbalance per the current version of the NEMA 3. Single-point power supply requires a single disconnect to
MG-1 Standard, it is most important that the unbalance between supply electrical power to the unit. This power supply must
phases be kept at a minimum. either be fused or use a circuit breaker.
4. All field wire lug range values given unit selection report
Table 29: Power Connection Availability
apply to 75°C rated wire per NEC.
Comp. 5. Must be electrically grounded according to national and
Disc. Panel High Short Circuit
Power Connection Circuit
Swt. Current Rating local electrical codes.
Breakers
Std. Single Point Std. Std. Std. CAUTION
Opt. Multi-Point Opt. Opt. Opt. A static discharge while handling circuit boards can cause
damage to components. Use a static strap before performing
Required field wiring varies depending on unit configuration. See any service work. Never unplug cables, circuit board terminal
wiring diagram information. Voltage limitations are: blocks, or power plugs while power is applied to the panel.
1. Voltage must be within 10 percent of nameplate rating.
2. Voltage imbalance not to exceed 2%. Since a 2% voltage Panel High Short Circuit Current Rating
imbalance can cause a current imbalance of 6 to 10 times The AGZ F control panels are designed with High Short Circuit
the voltage imbalance per the NEMA MG-1 Standard, it is Capacity (HSCCR) ratings, these ratings can vary by size and
important that the imbalance between phases be kept at a voltage. Please consult the unit data plate or submittal data for
minimum. the value.
DANGER
Qualified, licensed electricians must perform wiring. Electrical
shock hazard exists that can cause severe injury or death.

DANGER
LOCKOUT/TAGOUT all power sources prior to starting,
pressurizing, de-pressuring, or powering down the Chiller.
Disconnect electrical power before servicing the equipment,
including condenser fan motors or compressors. More than one
disconnect may be required to de-energize the unit. Failure to
follow this warning exactly can result in serious injury or death.
Be sure to read and understand the installation, operation, and
service instructions within this manual.

IOM 1359-1 35 WWW.DAIKINAPPLIED.COM

Electrical Data

Use with On-Site Generators

Switching from site grid power to generator power and vice versa
requires that the chiller must either be powered down or the
power must be off for more than five seconds to avoid sending
out of phase voltage to the chiller. A properly installed, fully
synchronized Automatic Transfer Switch must be used to transfer
power if the chiller is running under load when the switchover
occurs.

Generator Sizing

WARNING
Generator must be sized by an electrical engineer familiar with
generator applications.

Transfer Back to Grid Power

Proper transfer from stand-by generator power back to grid
power is essential to avoid chiller damage and must be used to
ensure proper function of the unit.

WARNING
Stop the chiller before transferring supply power from the
generator back to the utility power grid. Transferring power while
the chiller is running can cause severe chiller damage.
To properly reconnect power from the generator back to the utility
grid, configure the transfer switch provided with the generator to
automatically shut down the chiller before transfer is made. The
automatic shut-off function can be accomplished through a BAS
interface or with the “remote on/off” wiring connection shown in
the field wiring diagrams.
A start signal can be given any time after the unit has stopped
since the unit will use the normal start up sequence to restart.

DAIKIN APPLIED 36 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Electrical Data

Field Wiring
Figure 28: Field Wiring for Single Point

IOM 1359-1 37 WWW.DAIKINAPPLIED.COM

Electrical Data

Figure 29: Field Wiring for Multi-Point

DAIKIN APPLIED 38 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

Unit Controller Operation System Architecture

The overall controls architecture uses the following:

General Description • One MicroTech® unit controller

• One iMX8 PC
The MicroTech unit controller’s design not only permits the chiller
• One touch screen HMI
to run more efficiently, but also can simplify troubleshooting
if a system failure occurs. Every MicroTech unit controller is • I/O extension modules as needed depending on the
programmed and tested prior to shipment to facilitate start-up. configuration of the unit
• Communications interface(s) as needed based on installed
The controller menu structure is separated into three distinct
options
categories that provide the operator or service technician with a
full description of: The touch screen HMI and the iMX8 Linux PC will connect to the
unit controller via ethernet. Communication interface modules
1. current unit status and I/O extensions will connect to the unit controller via Modbus
2. control parameters protocol.
3. alarms
Security protection prevents unauthorized changing of the
setpoints and control parameters.
MicroTech unit control continuously performs self-diagnostic
checks, monitoring system temperatures, pressures and
protection devices, and will automatically shut down a
compressor or the entire unit should a fault occur. The cause
of the shutdown will be retained in memory and can be easily
displayed in plain English for operator review. The MicroTech
chiller controller will also retain and display the date/time the
fault occurred. In addition to displaying alarm diagnostics, the
MicroTech chiller controller also provides the operator with a
warning of limit (pre-alarm) conditions.

Figure 30: System Architecture

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Unit Controller Operation

Controller Inputs and Outputs Table 32: Digital Outputs

# Description Output Off Output On
Unit Controller N01 Alarm Indicator Alarm Not Active Alarm Active
N02 Fan Contactor Fan(s) Off Fan(s) On
(K101)
Table 30: Analog Inputs
N03 Fan Contactor Fan(s) Off Fan(s) On
# Description Signal Type (K102)
U1 Transformer Temperature NTC 10k Thermistor N04 Compressor #1 Compressor Off Compressor On
(TX1T)(OPT for TX01) (CMK1)
U4 Outside Ambient Temperature NTC 10k Thermistor N05 Compressor #3 Compressor Off Compressor On
(OAT1) (CMK3)
U7 LWT Reset (LWR1) 4-20 mA Current N06 See Table 33 and Table 34 Below
U8 Demand Limit (DML1) 4-20 mA Current N07 Fan Contactor Fan(s) Off Fan(s) On
(K201)

Table 31: Digital Inputs N08 Fan Contactor Fan(s) Off Fan(s) On
(K202)
# Description Signal Off Signal On N09 Compressor #2 Compressor Off Compressor On
ID1 Unit Switch Unit Disable Unit Enable (CMK2)

ID2 Motor Protect Relay Fault No Fault N010 Compressor #4 Compressor Off Compressor On
Circuit 1 (MP01) (CMK4)

ID3 Motor Protect Relay Fault No Fault N011 See Table 33 and Table 34 Below
Circuit 2 (MP02) N012 Evaporator Water Pump Off Pump On
ID4 High Press Switch Circuit Fault No Fault Pump 1
1 (HPR1) N013 Evaporator Water Pump Off Pump On
ID5 High Press Switch Circuit Fault No Fault Pump 2
2 (HPR2) NOTE: Digital outputs N06 and N011 are dependent on how
ID6 Transformer High Tem- Fault No Fault the unit is configured. There are two options as outlined
perature Switch (TX1R) in Table 33 and Table 34 below.
(OPT for TX01)
ID7 Evaporator Flow Switch No Flow Flow Table 33: Digital Outputs (Less than 6 Compressors)
ID8 Phase Voltage Monitor Fault No Fault
Circuit 1 (PVM1) # Description Output Off Output On
ID9 Phase Voltage Monitor Fault No Fault N06 Fan Contactor (K103) Fans Off Fans On
Circuit 2 (PVM1)
N011 Fan Contactor (K203) Fans Off Fans On
ID10 Ground Fault Circuit 1 Fault No Fault
(GFM1) (OPT)
Table 34: Digital Outputs (6 Compressors)
ID11 Ground Fault Circuit 2 Fault No Fault
(GFM2) (OPT)
# Description Output Off Output On
ID12 External Alarm/Event External Fault No External
Fault N06 Compressor #5 Compressor Off Compressor On
(CMK5)
ID13 Double Set Point/Mode Use alternate mode or LWT
Switch set point. See sections on Unit N011 Compressor #6 Compressor Off Compressor On
Mode Selection and LWT Target. (CMK6)
ID14 Remote Switch Remote Dis- Remote
able Enable Table 35: Expansion Valve Outputs

# Description Signal Output

J27 Circuit 1 EEV (EXV1) Four Wire Stepper Motor Signal
J28 Circuit 2 EEV (EXV2) Four Wire Stepper Motor Signal
NOTE: Expansion Valve Outputs in UC01 are only used when the unit is NOT
configured for Remote Evaporator

DAIKIN APPLIED 40 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

Expansion Module (Sensor Box) Expansion Module (Remote Evaporator

Universal channels U1-U4 are dependent on how the unit is Models Only)
configured. There are two options as outlined below:
1. The unit does NOT have a Remote Evaporator Table 40: Analog Inputs

# Description Signal Type

Table 36: Analog Inputs U1 Circuit 1 Suction Pressure (SCP1) Ratiometric 0.5-4.5 Vdc
# Description Signal Type U2 Circuit 2 Suction Pressure (SCP2) Ratiometric 0.5-4.5 Vdc
U1 Circuit 1 Suction Pressure (SCP1) Ratiometric 0.5-4.5 Vdc Circuit 1 Suction Temperature
U3 NTC 10k Thermistor
(SCT1)
U2 Circuit 2 Suction Pressure (SCP2) Ratiometric 0.5-4.5 Vdc
Circuit 2 Suction Temperature
Circuit 1 Suction Temperature U4 NTC 10k Thermistor
U3 NTC 10k Thermistor (SCT2)
(SCT1)
Circuit 2 Suction Temperature
U4 NTC 10k Thermistor Table 41: Analog Inputs
(SCT2)
2. The unit has a Remote Evaporator # Description Signal Type
Valve A Circuit 1 EEV (EXV1) Four Wire Stepper Motor Signal
Table 37: Analog Inputs Valve B Circuit 2 EEV (EXV2) Four Wire Stepper Motor Signal

# Description Signal Type

Circuit 1 Low Pressure Switch
EXV Information
U1 Digital Input
(LPS1)
NOTICE
Circuit 2 Low Pressure Switch The values below are determined based on user entered EXV
U2 Digital Input
(LPS2)
type. Current unit design and software supports only one valve
U3 None N/A type at this time resulting in the default EXV values being
U4 None N/A appropriate.

Table 38: Digital Outputs Table 42: Stepper Motor Driver Configuration - Packaged
Unit Models)
Description Output Off Output On
Liquid Line Solenoid Parameter Value Unit
N01 Solenoid Off Solenoid On
Circuit 1 (LLS1) Total Steps 600 steps
Hot Gas Bypass Circuit Movement Speed 160 steps/sec
N02 Solenoid Off Solenoid On
1 (SV1)
Move Current 800 mA
Liquid Line Solenoid
N03 Solenoid Off Solenoid On Hold Current 160 mA
Circuit 2 (LLS2)
Hot Gas Bypass Circuit Duty Cycle 50 %
N04 Solenoid Off Solenoid On
2 (SV2) Full Close Steps 600 steps
Four Way Valve Circuit 1 Solenoid Off Solenoid On Extra Open Enable False n/a
N05
(FWV1) (Cool) (Heat)
Extra Close Enable True n/a
Four Way Valve Circuit 2 Solenoid Off Solenoid On
N06
(FWV2) (Cool) (Heat)
Table 43: Stepper Motor Driver Configuration (Remote
Expansion Module (Main Box) Evaporator Models)

Parameter Value Unit

Table 39: Digital Outputs Valve Configuration See Table Below N/A

# Description Output Off Output On Overdriver Enable OD 1 %

N01 Fan Contactor (K103) Fan(s) Off Fan(s) On Overdrive Block Time 1440 min

N02 Fan Contactor (K104) Fan(s) Off Fan(s) On Valve Neutral Zone 0 %

N03 Fan Contactor (K203) Fan(s) Off Fan(s) On Preset OD 0 %

N04 Fan Contactor (K204) Fan(s) Off Fan(s) On

Table 44: Danfoss Driver Configuration

EXV Size Value

ETS Colibri 12C (7/8”) 29
ETS Colibri 25C (7/8”) 30
ETS Colibri 50C (7/8”) 31

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Unit Controller Operation

EXV Size Value Description Default Range

ETS Colibri 50C (1-1/8”) 31 Evap Pump 1 Run
0 0 to 999999 hours
Hours
ETS Colibri 100C (1-1/8”) 32
Evap Pump 2 Run
0 0 to 999999 hours
ETS Colibri 11C (1-3/8”) 32 Hours
Expansion Valve Manual Settings - The parameters below can
be changed to override the automatic calculations. These setpoints
Set Points should only be changed if in a non-nominal condition and the automat-
ic calculations are not sufficient.
Set points are initially set to the values in the Default column, and EXV Manual Preo­pen 0.0 % 0.0 to 60.0 %
can be adjusted to any value in the Range column. Set points EXV Manual Stage Up
0.0 % 0.0 to 25.0 %
are stored in permanent memory. Basic unit configuration set Bump
points will require the unit to be off in order to make a change and EXV Manual Stage
0.0 % 0.0 to 25.0 %
Down Bump
then require rebooting the controller in order to apply a change.
Power Conservation and Limits
If an option is not included on the unit, the respective set point
LWT Reset Enable Disable Disable, Enable
may not be visible. Data and settings that only apply to a specific
Demand Limit Enable Disable Disable, Enable
operation mode will only be visible if that mode is selected.
Unit Sensor Offsets
Evap LWT Sensor
Table 45: Unit Level Set Point Defaults and Ranges 0°C (0°F) -5.0 to 5.0°C (-9.0 to 9.0°F)
Offset
Description Default Range Evap EWT Sensor
0°C (0°F) -5.0 to 5.0°C (-9.0 to 9.0°F)
Basic Unit Configuration Offset
Unit Model Not Set AGZ002 – AGZ014 OAT Sensor Offset 0°C (0°F) -5.0 to 5.0°C (-9.0 to 9.0°F)
AF, DC, DD, DE, DF, DG, Transformer Tempera-
Fan Configuration Not Set 0°C (0°F) -5.0 to 5.0°C (-9.0 to 9.0°F)
DH, DV, HA, HB ture Sensor Offset
Valid 8 Character Code – Alarm and Limit Settings - Units
Compressor Code Not Set Evaporator Water 2.2°C See Dynamic Set Point
Item Detail
208V, 230V, 380V, 400V, Freeze (36°F) Ranges
Nominal Voltage Not Set Evaporator Flow Loss
460V, 575V 5 sec 5 to 15 sec
Evaporator Packaged, Remote Evap, Delay
Packaged Evaporator Recirculate
Configuration Heat Pump 3 min 1 to 10 min
Evaporator Glycol No No, Yes Timeout
Cool, Cool/Ice, Ice (see note External Fault Config-
Available Modes Cool None None, Event, Alarm
below table) uration
Ground Fault Protection No No, Yes 1.7°C See Dynamic Set Point
Low Ambient Lockout
(35.1°F) Ranges
ETS 12C, ETS 25C, ETS
Circuit 1 EXV Size Not Set Low OAT Lockout Con- Lockout & Lockout & Stop, Lockout
50C, ETS 100C
figuration Stop Only, Disabled
ETS 12C, ETS 25C, ETS
Circuit 2 EXV Size Not Set Alarm and Limit Settings - Circuits
50C, ETS 100C
Power Connection Low Evap Pressure 696.4 kPa See Dynamic Set Point
Single Point Single Point, Multi Point Hold (103 PSI) Ranges
Configuration
Mode/Enabling Low Evap Pressure 689.5 kPa See Dynamic Set Point
Unload (102 PSI) Ranges
Unit Enable Enable Disable, Enable
Low Evaporator Pres- 151.7 kPa 138 to 207 KPA (20 to 30
Control source Local Local, Remote, Network
sure Fault (22 PSI) PSI)
Unit Test Mode Off Off, On Evaporator Maximum 1310 kPa 979 to 1379 KPA (142 to
Staging and Capacity Control Operating Pressure (190 PSI) 200 PSI)
7°C See Dynamic Set Point High Condenser Pres- 3550.8 KPA 3241 to 4206 KPA (470 to
Cool LWT 1
(44.6°F) Ranges sure Hold (515 PSI) 610 PSI)
7°C See Dynamic Set Point High Condenser Pres- 4137 KPA 3241 to 4206 KPA (470 to
Cool LWT 2
(44.6°F) Ranges sure Unload (600 PSI) 610 PSI)
4.4°C -9.5 to 4.4°C (14.9 to High Condenser Pres- 4206 KPA 3310 to 4275 KPA (480 to
Ice LWT
(39.9°F) 39.9°F) sure Fault (610 PSI) 620 PSI)
5.6°C High Discharge Tem- 121°C 93.3 to 149°C (200 to
Startup Delta T 0.6 to 8.3°C (1.1 to 14.9°F)
(10.1°F) perature Fault (250°F) 300°F)
0.3°C High Transformer Tem- 65.6°C 54.4 to 104.4°C (130 to
Shut Down Delta T 0.3 to 1.7°C (0.5 to 3.1°F)
(0.5°F) perature Unload (150°F) 220°F)
Stage Up Delay 240 sec 120 to 480 sec Low OAT Start Time 165 sec 150 to 240 sec
Stage Down Delay 30 sec 20 to 60 sec Network Communication Configuration
0.6°C/min 0.1 to 2.7°C/min (0.2 to BACnet Module Dev
Max Pulldown Rate 0 0 to 4194302
(1.1°F/min) 4.9°F/min) Instance
Evaporator Pump Control BACnet Module Unit
Evap Pump Control #1 Only, #2 Only, Auto, #1 English Metric, English
#1 Only Support
Configuration Primary, #2 Primary
BACnet Module Reset
Evap Recirc Timer 90 15 to 300 seconds Done Done, False, True
Out of Service

DAIKIN APPLIED 42 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

Description Default Range Table 50: EXV Preopen Parameters

BACnet IP Module Nominal EXV Low EXV
Off Off, On Parameter
DHCP (Design LWT >= 50°F) (Design LWT >= 50°F)
BACnet IP Module 000.000.000.000 to Preopen Position 20-30% 35-45%
Network Address 999.999.999.999
Stage Up Bump
BACnet IP Module 000.000.000.000 to +7% +15%
Percent Change
Network Mask 999.999.999.999
Stage Down
BACnet IP Module 000.000.000.000 to Bump Percent -10% -15%
Network Gateway 999.999.999.999 Change
The following apply to both BACnet MSTP and Modbus, depend-
ing on the selected protocol.
Module Address 1 0 to 127
Circuit Level Set Points
Module Baud Rate 38400 9600, 19200, 38400, 76800 The settings in this section all exist for each individual circuit.
Module Max Master 0 0 to 127
Module Max Info Frame 0 0 to 255 Table 51: Set Points for Individual Circuits
Module Parity Even Even, Odd, None
Description Default Range
Module Stop bits 1 0 to 2
Circuit and Compressor Enable
BAS Control Inputs
Network Unit Enable Disable Disable, Enable Circuit Enable Enable Disable, Enable
Network Mode Com- Compressor 1 Enable
Cool Cool, Ice Auto Auto, Off
mand (Circuit 1 Only)
7°C See Dynamic Set Point
Network Cool Set Point Compressor 3 Enable
(44.6°F) Ranges Auto Auto, Off
(Circuit 1 Only)
4.39°C -9.5 to 4.4°C (14.9 to
Network Ice Set Point Compressor 5 Enable
(39.9°F) 39.9°F) Auto Auto, Off
(Circuit 1 Only)
Network Capacity Limit 100% 0 to 100%
Network Alarm Clear Compressor 2 Enable
Normal Normal, Clear Alarm Auto Auto, Off
Command (Circuit 2 Only)
Compressor 4 Enable
Auto Auto, Off
Dynamic Set Point Ranges (Circuit 2 Only)
Compressor 6 Enable
Table 46 to Table 49 provide settings that have different ranges of Auto Auto, Off
(Circuit 2 Only)
adjustment based on other settings.
Condenser EXV Control
Condenser Target
Table 46: Cool LWT 1 and Cool LWT2 Set Point Ranges Auto Auto, Manual
Mode
Evaporator Manual Condenser 21.1 to 48.9 °C (70
Unit Vintage Range 37.8 °C (100 °F)
Glycol Target to 120 °F)
No F vintage 4.4 to 21.1°C (39.9 to 70°F) 2.8 to 11.1 °C (5 to
SSH Target 5.6 °C (10 °F)
Yes F vintage -9.5 to 21.1°C (14.9 to 70°F) 20 °F)
EXV Control Mode Auto Auto, Manual
Table 47: Evaporator Water Freeze Matches Current
Manual EXV Setpoint 5 to 100 %
Automatic Setpoint
Evaporator Glycol Range Sensor Offsets
No 2.2 to 5.6°C (36 to 42.1°F)
Suction Pressure -100 to 100 kPa
Yes -28.89 to 5.6°C (-20 to 42.1°F) 0 kPa (0 PSI)
Sensor Offset (-14.5 to 14.5 PSI)
Discharge Pressure -100 to 100 kPa
0 kPa (0 PSI)
Table 48: Low Ambient Lockout Sensor Offset (-14.5 to 14.5 PSI)
Suction Temperature -5.0 to 5.0°C (-9.0 to
Condenser Fan Configuration Range 0°C (0°F)
Sensor Offset 9.0°F)
All Single Speed (AF) 0 to 15.6°C (32 to 60.1°F) Discharge Tempera- -5.0 to 5.0°C (-9.0 to
0°C (0°F)
First Fan or All Fan Variable ture Sensor Offset 9.0°F)
Speed (DC, DD, DE, DF, DG, -23.3 to 15.6°C (-9.9 to 60.1°F)
DH, DV, HA, HB)

Table 49: Low Evaporator Pressure

Available Mode Range

Selection
No 620.5 to 827.4 KPA (90 to 120 PSI)
Yes 317 to 827.4 KPA (46 to 120 PSI)

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Unit Controller Operation

Unit Functions Unit Capacity

Unit capacity calculations are based on the nominal horsepower
Unit Model Configurations of the running compressors in relation to the total nominal
horsepower of all compressors.
Basic configuration of the unit is done via the unit configuration
sequence.
The unit model and compressor code chosen in the unit
configuration sequence should match to one of the configurations
in the tables below. There are other parameters needed for
configuration that are found on the unit’s item detail. The total list
of parameters is in the Basic Unit Configuration section under Set Capacity Staging Deadbands
Points.
The staging deadbands the band in which unit capacity will
The digits at the end of the Unit Model represent the number of not be increased or decreased. They are based off a relation
fans on the unit. For example, AGZ008 has 8 Fans. Each letter of the evaporator temperature delta, the unit capacity, and the
in the eight-letter compressor code identifies either a compressor capacity change of staging up or down a compressor. The largest
(by size) or an “N” which means no compressor. The first four compressor available for stage up or stage down is used in the
letters correspond to circuit one and the second four letters following calculations for a conservative estimate. The stage up
correspond to circuit two. The Compressor Type section in and stage down deadbands are each determined from a three-
Circuit Functions has more information about the size of each part calculation, then limited to stay within defined boundaries of
compressor by letter. the range:

Configuration Validation
A configuration will be marked as invalid if the operator enters an The stage up deadband is the measure of how far the leaving
invalid compressor code. An invalid compressor code is a code water temperature be must above the target to trigger a stage up
not listed in the tables above. in capacity.
The stage down deadband is the measure of how far the leaving
Calculations water temperature be must below the target to trigger a stage
The calculations in this section are used in unit level control logic down in capacity.
or in control logic across all circuits.
Figure 31: Capacity Staging Deadbands
Evaporator Delta T
The evaporator water delta T is calculated as entering water
temperature minus leaving water temperature.

LWT Slope
LWT slope is calculated such that the slope represents the
estimated change in LWT over a time frame of one minute.

Pulldown Rate
The slope value calculated above will be a negative value as the
water temperature is dropping. A pulldown rate is calculated by
inverting the slope value and limiting to a minimum value of 0°F/
min.
No. Description

LWT Error 1 Leaving Water Temperature

LWT error is calculated as: 2 Stage Up Control Band

3 Stage Down Control Band
4 LWT Target + Stage Down Control Band
5 LWT Target
6 LWT Target + Stage Up Control Band

DAIKIN APPLIED 44 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

Stage Up Deadband Table 52: Unit Enable

To calculate the stage up deadband, first the largest compressor
Unit BAS Unit
available for stage up is determined. With that information, the Control
Unit Enable Remote Enable Enable/
percent change if this compressor were to stage up is calculated. Source Set
Switch HMI Set Switch Set Disable
Point
Point Point State

- Off - - - Disable
- Disable - - Disable
Local
Using the predicted capacity change for staging up, the resulting On Enable - - Enable
change in leaving water temperature is predicted.
- - Off - Disable
Remote
On - On - Enable
- - - Disable Disable
Using the change in leaving water temperature, the stage up Network
On - - Enable Enable
control band is calculated.

Unit Mode Selection

Stage Down Deadband The operating mode of the unit is determined by set points and
inputs to the chiller. The Available Modes set point determines
To calculate the stage down deadband, first the largest what modes of operation can be used. The Control Source set
compressor available for stage down is determined. With that point determines where a command to change modes will come
information, the percent change if this compressor were to stage from.
down is calculated.
The Mode Switch digital input switches between cool mode and
ice mode if they are both available and the control source is set
to ‘Local’. The BAS mode request switches between cool mode
Using the predicted capacity change for staging down, the and ice mode if they are both available and the control source is
resulting change in leaving water temperature is predicted. The set to ‘Network’.
result of the first two equations will be a negative value, reflecting Unit Mode is selected according to the following table:
a decrease in capacity.
Table 53: Unit Mode Settings
Available Control
Mode BAS Mode
Modes Set Source Set Unit Mode
Switch Command
Using the change in leaving water temperature, the stage down Point Point
control band is calculated. The sign is flipped so the stage down Cool - - - Cool
control band is a positive value. Off - Cool
Local/Remote
On - Ice
Cool/Ice
- Cool Cool
Network
Start Up Temperature - Ice Ice
Ice - - - Ice

Shut Down Temperature

Unit Enable
Enabling and disabling the chiller is accomplished using set
points and inputs to the chiller. The Unit Switch input and the Unit
Enable HMI Set Point are both required to be On/Enable for the
unit to be enabled when the control source is set to ‘Local’. If the
control source is set to ‘Remote’, the Unit Switch and Remote
Switch inputs are both required to be On/Enable for the unit to be
enabled. If the control source is set to ‘Network’, the Unit Switch
input and BAS Enable set point must both be On/Enable for the
unit to be enabled.

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Unit Controller Operation

Unit States T2 – Start to Auto

The unit will always be in one of three states: All of the following are required:
Off – Unit is not enabled to run • Evaporator flow is seen and recirculated
Auto – Unit is enabled to run T3 - Auto to Shut Down
Pumpdown – Packaged units with microchannel coils will Any of the following are required:
not do a pumpdown; however, the pumpdown state will exist
for units with microchannel coils and remote evaporator. So • Unit Enable = Off
if the conditions for the Auto to Pumpdown transition occur, • Unit Mode = Ice AND LWT target is reached
the unit state will transition from Auto to Pumpdown and then • Low Ambient Lockout is active
immediately to Off. • A Unit Fault is present

Figure 32: Transitions between these states are shown in the T4 – Shut Down to Alarm
following diagram. All of the following are required:
• A Unit Fault is present

T5 – Start to Shut Down

Any of the following are required:
• A Unit Fault is present
• Unit Enable = Off

T6 – Off to Alarm
All of the following are required:
• A Unit Fault is present

T7 – Alarm to Off
All of the following are required:
• No Unit Faults are present

T8 – Shut Down to Off

T1 – Off to Start All of the following are required:
All of the following are required:
• No Unit Faults are present
• Unit Enable = On
• No Unit Alarms active T9 – Off to Test
• If Unit Mode = Ice then Ice Delay is not active All of the following are required:
• There is at least one compressor available to start • No Unit Faults are present
• Low Ambient Lockout is not active • Unit Enable = Off
• Unit configuration settings are valid • Test Mode = True

T10 – Test to Shut Down

Any of the following are required:
• A Unit Fault is present
• Unit Enable = On
• Test Mode = False

DAIKIN APPLIED 46 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

Low Ambient Lockout Table 54: Low OAT Lockout

The operation of the chiller in response to OAT dropping below Alarm Low OAT Lockout
the Low OAT Lockout set point is configurable if the chiller has Type Problem
variable speed condenser fans. In that case, there are three
Displayed Text Message Module Module ID Payload
options: Code Type
• Lockout and Stop – Chiller will shut down and lockout. Alarm Parts 65 1 0 0
• Lockout only – Chiller does not shut down running circuits, Alarm Code 1090584576
will lock out circuits that are off.
Trigger Trigger conditions are defined in the sections
• Disabled – Chiller does not shut down or lock out. above
For chillers without condenser fan VFDs, there is no Action Taken: No Action
configuration, and the chiller will always operate according to the Reset Clearing conditions are defined in the section
first option shown above. Descriptions of the operation for each above
option are in the following sections. Low ambient lockout logic
resides on the PC.
Unit Status
Lockout and Stop Operation Unit Status is displayed to indicate the general operating
condition of the unit. The following table lists the text displayed
When the chiller is configured for lockout and stop, it will operate
for each unit status and the conditions that enable each status.
as described in this section.
If more than one status is enabled at the same time, the highest
If the OAT drops below the low ambient lockout set point and the numbered status overrides the others and is displayed.
OAT sensor fault is not active, low ambient lockout is triggered.
The unit will perform a normal shutdown if any circuits are Table 55: Unit Status
running. Once all circuits shut off, the unit will remain in the off
state until the lockout has cleared. This condition will clear when # Status Conditions
OAT rises to the lockout set point plus 2.5°C (4.5°F). 0 None There is an initialization error
1 Auto Unit State = Auto
Lockout Only Operation 2 Off:Low OAT Lockout
Unit State = Off and low ambient
lockout is active
When the chiller is configured for lockout only, it will operate as
Unit State = Auto and all circuits or
described in this section. 3 Auto:All Disabled
compressors are disabled
If OAT drops below the low ambient lockout set point and any 4 Alarm Unit State = Off and Unit Alarm active
circuits are running, then those circuits will be allowed to remain 5 Off:HMI Disable
Unit State = Off, Control Source =
running, and the unit will not enter the low ambient lockout Local, and Local Enable = Disable
condition. Circuits that are not running will enter a circuit level Unit State = Off, Control Source =
6 Off:Remote Switch
lockout condition when OAT drops below the lockout set point. Remote, and Remote Switch is open
This condition will clear at the circuit level when OAT rises to the Unit State = Off, Control Source =
7 Off:BAS Disable
Network, and BAS Enable = false
lockout set point plus 2.5°C (4.5°F).
Unit State = Off and Unit Switch =
8 Off:Unit Switch
If the OAT is below the low ambient lockout set point, the OAT Disable
sensor fault is not active, and neither circuit is running, low 9 Off:Test Mode Unit State = Off and Unit Mode = Test
ambient lockout is triggered. The unit will go directly into the off Unit State = Off and Unit Mode = Ice
10 Off:Ice Mode Timer
state and will remain in the off state until the lockout has cleared. and Ice Mode Timer = Active
This condition will clear when OAT rises to the lockout set point 11 Auto:Wait For load
Unit State = Auto, no circuits running,
plus 2.5°C (4.5°F). and LWT is less than startup temp
Unit State = Auto and Evaporator
12 Auto:Evap Recirculate
Disabled Option State = Start
Unit State = Auto, Evaporator State =
When the chiller is configured to disable low ambient lockout, the 13 Auto:Wait For Flow
Start, and Flow Switch is open
unit will not enter the low ambient lockout condition or shut down 14 Shutdown Unit State = Shutdown
any running circuits regardless of the OAT. Unit State = Auto, max pulldown rate
15 Auto:Max PDR
has been met or exceeded
BAS Annunciation Unit State = Auto, unit capacity limit
16 Auto:Unit Cap Limit
has been met or exceeded
Low Ambient Lockout is not an alarm, but it can be annunciated
Unit State = Auto and transformer high
to the BAS as if it is one. When the Low OAT Lockout BAS Alert 17 Auto:Trns Hold
temperature hold is active
setpoint is set to On and the low ambient lockout is active, the
Unit State = Auto and high ambient
following alarm will trigger: 18 Auto:High Amb Limit
capacity limit is active
Unit State = Auto and normal Rapid
19 Auto:Rapid Restore
Restore is active

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Unit Controller Operation

# Status Conditions T5 – Run to Start

Unit State = Auto and Backup Chiller Requires flow switch input off for time longer than the Flow
20 Auto:Backup Chiller
Rapid Restore is active
Loss Delay set point.
The selected unit configuration is not
21 Off:Invalid Config
valid.
Freeze Protection
Evaporator Pump Control To protect the evaporator from freezing, the evaporator pump
For control of the evaporator pumps, three evaporator pump will be started to circulate water through the loop as a last
control states should be used: resort. Other countermeasures should avoid water temperatures
dropping to a dangerous level, but, if need be, this freeze
Off - No pump on. protection function will be activated.
Start – Pump is on, water loop is being recirculated. Freeze protection should start if all of the following are true:
Run – Pump is on, water loop has been recirculated and • LWT ≤ Evap Freeze set point for at least three seconds
circuits can start if needed.
• LWT sensor fault isn’t active
• Evaporator Flow Loss alarm is not active
Figure 33: Transitions between these states are shown in the
following diagram. Freeze protection should end when any of the following are true:
• [LWT ≥ 1.11°C + Evap Freeze set point OR LWT sensor
fault is active] and pump has been in start or run state for at
least 15 minutes
• Evaporator Flow Loss alarm is active

Pump Selection
The pump output used will be determined by the Pump Control
Mode set point. This setting allows the following configurations:

Table 56: Pump Selection

Pump Selection Description

Mode
Pump 1 Primary Pump 1 is used normally, with pump 2 as a
backup
Pump 2 Primary Pump 2 is used normally, with pump 1 as a
backup
Pump Load The primary pump is the one with the least run
T1 – Off to Start Balancing hours, the other is used as a backup
Requires any of the following: Pump 1 Only Pump 1 will always be used

• Unit state = Auto Pump 2 Only Pump 2 will always be used

• Freeze protection started

Primary/Standby Pump Staging
T2 – Start to Run The pump designated as primary will start first. If the evaporator
Requires the following: state is start for a time greater than the recirculate timeout set
point and there is no flow, then the primary pump will shut off and
• Flow ok for time longer than evaporator recirculate time set
the standby pump will start. When the evaporator is in the run
point
state, if flow is lost for more than half of the Flow Loss Delay set
T3 – Run to Off point value, the primary pump will shut off and the standby pump
will start. Once the standby pump is started, the flow loss alarm
Requires all of the following: logic will apply if flow cannot be established in the evaporator
• Unit state is Off start state, or if flow is lost in the evaporator run state.
• Freeze protection not active
Pump Load Balancing
T4 – Start to Off If auto pump control is selected, the primary/standby logic above
Requires all of the following: is still used. When the evaporator is not in the run state, the run
hours of the pumps will be compared. The pump with the least
• Unit state is Off
hours will be designated as the primary at this time.
• Freeze protection not active

DAIKIN APPLIED 48 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

LWT Target Compressor Staging

The LWT Target varies based on various settings and inputs. A The compressors will stage until the leaving water temperature
base LWT Target is selected, and a reset can be used to offset reaches its setpoint within a dead band. Once the unit is enabled,
the target to a higher value when the chiller is operating in Cool if the water delta is sufficient for start, capacity control will stage
mode. In Ice mode, no reset can be applied. up a compressor, triggering the corresponding circuit to start.
Capacity control will continue to stage compressors on with a
The base LWT target is selected as shown in the following table:
stage up delay after each to meet the leaving fluid target. Before
a compressor can stage on, the pulldown rate is checked to
Table 57: LWT Target make sure staging up will not result in a pulldown rate higher than
Available Control the max setpoint.
Mode BAS Mode Base LWT
Modes Set Source Set
Switch Command Target
Point Point Staging Up a Compressor
Cool LWT 1
Off - Requirements for staging up:
Set Point
Local/Remote
Cool LWT 2 • LWT > Stage Up Temperature
Cool On -
Set Point • Pulldown Rate < Max Pulldown Rate
BAS Cool
Network - - • Stage Up Delay Timer has Expired (see exception below)
Set Point
Cool LWT 1 • If a transformer is present, the temperature is more than
Off - 10°F below the unload setpoint
Set Point
Local/Remote
Ice LWT • The staging circuit has a discharge pressure less than the
On -
Set Point High Condenser Pressure Hold setpoint
Cool/Ice
BAS Cool • The resulting capacity will not exceed the demand limit
- Cool
Set Point
Network
- Ice
BAS Ice Stage Up Delay
Set Point
A minimum amount of time, defined by the Stage Up Delay set
Ice LWT
Local/Remote - - point, should pass after a capacity change before a compressor
Set Point
Ice can be staged on again.
BAS Ice
Network - -
Set Point This delay should only apply when at least one compressor
is running. If the first compressor starts and quickly shuts off
Leaving Water Temperature (LWT) Reset for some reason, another compressor may start without this
Leaving water reset raises the leaving water temperature set- minimum time passing.
point when the building load is at less-than-design conditions.
Producing warmer chilled water lessens the burden on the Choosing compressor to stage up
compressors, which means that the chiller is more efficient. In general, compressors with fewer starts will normally start first.
The base LWT target may be reset if LWT reset is enabled via the When selecting the next compressor to turn on, first each circuit
setpoint. When the setpoint is set to off, no leaving water reset is evaluated. The circuit that has more available capacity to start
will happen and the leaving water setpoint will remain the same. is chosen. This is measured by taking the sum of the nominal
horsepower of each compressor available for start. If both circuits
The reset amount is adjusted based on the 4 to 20 mA reset are equal, circuit 1 is chosen.
input. Reset is 0° if the reset signal is less than or equal to 4 mA.
Reset is 5.56°C (10.0°F) if the reset signal equals or exceeds The available compressor with the least starts on the chosen
20 mA. The amount of reset will vary linearly between these circuit will be staged up. If a compressor is already running, is
extremes if the reset signal is between 4 mA and 20 mA. disabled, or has an active start-start timer it will be marked as
un-available. In addition, if the resulting capacity from a stage
When the reset amount increases, the Active LWT Target is up is over the demand limit (if active), that compressor will be
changed at a rate of 0.1°C every 10 seconds. When the active marked as un-available. Capacity predictions are based on
reset decreases, the Active LWT Target is changed all at once. nominal horsepower, so larger compressors may be over the
After the reset is applied, the LWT target can never exceed a demand limit but a smaller sized compressor on the same circuit
value of 70°F for F vintage. may be available to start. If multiple compressors are equal, the
compressor with the lowest ID number is chosen.
Unit Capacity Control
Capacity control is responsible for the overall output of the chiller.
Staging Down a Compressor
Compressors are staged to meet the active evaporator leaving Requirements for staging up:
fluid temperature target. • Water Delta < Stage Down Dead Band
• Stage Down Timer has Expired

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Unit Controller Operation

Stage Down Delay High Ambient Limit

A minimum amount of time, defined by the Stage Down Delay set On units configured with single point power connections, the
point, should pass after a capacity change before a compressor maximum load current could be exceeded at high ambient
can be staged off again. temperatures.
However, if the LWT drops below the Shut Down Temperature If the power connection is single point and the OAT rises to
the stage down delay is ignored and the unit will shut down 46.67°C (116°F), the high ambient limit becomes active. This limit
immediately. is removed when the OAT drops back down to 45.56°C (114°F).
When the limit is active, the unit is allowed to run all but one
Choosing compressor to stage down compressor. So, it will inhibit the unit from loading if all but
In general, compressors with more run hours will normally stop one compressor is on, and it will shut down a compressor if all
first. When selecting the next compressor to turn off, first each compressors are running.
circuit is evaluated. The circuit that has more running capacity
is chosen. This is measured by taking the sum of the nominal
horsepower of each compressor that is currently running. If both RapidRestore Option
circuits are equal, circuit 1 is chosen. RapidRestore is an option that can be added to Trailblazer
The running compressor with the most run hours on the chosen chillers. The general purpose of the option is to allow the
circuit will be staged down. If a compressor has an active start- capability to restart more quickly and to load faster than normal
stop timer, it will be marked as un-stoppable until the start- operation.
stop timer is expired. If multiple compressors are equal, the
compressor with the lowest ID number is chosen. Enabling
The RapidRestore option shall be enabled via the RapidRestore
set point and requires the optional module. Doing so will require
Unit Capacity Overrides the following to be true:
Unit capacity limits can be used to limit total unit capacity in Cool • RapidRestore module is present at address 22
mode only. Multiple limits may be active at any time, and the
lowest limit is always used in the unit capacity control. • DI1 on the RapidRestore module has a signal
If the DI1 input loses the signal or the RapidRestore module is
Demand Limit no longer communicating, then the option will be disabled in the
chiller.
The maximum unit capacity can be limited by a 4 to 20 mA signal
on the Demand Limit analog input. This function is only enabled
if the Demand Limit set point is set to ON. The maximum unit
Operation Following Power Cycle
capacity stage is determined as to not exceed the calculated max The chiller will enter RapidRestore upon powering up when the
capacity reflected demand limit. following conditions are met:
• Unit was running at a capacity greater than 0% at the time
Network Limit of power loss
The maximum unit capacity can be limited by a network signal. • Unit is enabled
This function is only enabled if the control source is set to Rapid Restore should end if any of the following conditions occur:
network. The maximum unit capacity stage is based on the
• LWT < Stage Up Temperature
network limit value received from the BAS. The compressors are
staged as to not exceed the calculated max capacity. • Unit capacity = 100%
• All circuits become disabled for any reason
Maximum LWT Pulldown Rate • Unit becomes disabled for any reason
The maximum rate at which the leaving water temperature can • 10 minutes have passed since unit powered up
drop will be limited by the Maximum Pulldown Rate set point, only
when the unit mode is Cool.
If the rate exceeds this set point, no more compressors will be
started until the pulldown rate is less than the set point. Running
compressors will not be stopped as a result of exceeding the
maximum pulldown rate.

DAIKIN APPLIED 50 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

Evaporator Recirculation Time Backup Chiller Operation

Only the value used in the evaporator state logic will be limited, If the Backup Chiller digital input is on, then the chiller is
and only if the set point exceeds the 100 second limit. considered a ‘backup chiller’. When a ‘backup chiller’ is enabled
to run, it will use an evaporator recirculation time of 13 seconds
This action will ensure that the chiller is ready to start after the
regardless of what the evaporator recirculation time set point
motor protection module delay has expired.
is. Then, fast loading will be used as outlined above in the fast
When Rapid Restore is triggered, the evaporator recirculation loading section.
time must be limited to a time that will allow the chiller to start
With the backup chiller option enabled, the unit can achieve full
within the allowed time. This time limit value will depend on
capacity even faster than during a power loss scenario.
which firmware/software combination is used.
Note that the evaporator recirculation time set point is not Compressor Starting
changed as a result of this. Only the value used in the evaporator
state logic will be limited, and only if the set point exceeds the During normal operation, chiller controls will limit compressor
limit value. starts by enforcing the circuit configuration timers listed in
Table 51 on page 43. During RapidRestore operation, the
compressor cycle timers are not maintained through power
Time to Start cycling. The following table shows the approximate best case
The compressor manufacturer requires a minimum two minute scenario for start time and loading time with the RapidRestore
delay after power on until a compressor should be started, which operation.
is to ensure proper operation of the motor protection modules.
Unit controller boot time is about 10 seconds, so a delay of 110 Figure 34: RapidRestore Mode Response Times
seconds will start upon completing boot up. After this delay, the
two minute manufacturer requirement will be satisfied. Maximum Re- Time to
# of compressors
start Time Fully Loaded
After the 110 second delay, the first circuit to start will enter the
preopen state, which takes five seconds. The end result is that 4 220 sec.
the first compressor should start approximately 125 seconds after Power lost and
125 sec.
restored
power is restored to the chiller. 6 280 sec.
Current software has a delay of 150 seconds after bootup is
complete before the first circuit can start. The software will be 4 115 sec.
Backup chiller with
changed to use the 110 second delay discussed above only 20 sec.
constant power
6 175 sec.
when the chiller is performing the RapidRestore operation.

Fast Loading Sound Reduction

Fast loading will be performed while Rapid Restore is active. This On AGZ-F chillers, sound reduction is built into the fan code
is done via changes to the stage up delays and max pulldown which is input in the unit commissioning sequence. The
rate. condenser control section contains information about rpm ranges
corresponding to the codes. Only the fan code the unit was
Capacity Changes configured for should be used.
Normally the delay between compressors staging on is
determined by the Stage Up Delay setting. That setting defaults Test Mode
to 240 seconds and has a range of 120 to 480 seconds. During Test mode is a variation of manual control that is not meant to
fast loading, a delay of 60 seconds between compressor starts make cold water, but to test individual components. Test mode is
within a circuit should be used. In addition, a delay of 30 seconds useful in situations like opening the EXVs and solenoids manually
between compressor starts on different circuits should be used. to allow for pump down. In test mode, compressors will “bump”
This change during RapidRestore operation will allow for a faster when started, so they will turn themselves off after a few seconds
time to full capacity while maintaining stable operation within with no additional action.
each circuit. Assuming both circuits are able to run, the effective
unit stage up delay will be 30 to 35 seconds, so it will load about
four times faster during RapidRestore than the fastest it possibly
can during normal operation.

Max Pulldown Rate

Max pulldown rate will be ignored during fast loading so the
chiller can reach full capacity as soon as possible.

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Unit Controller Operation

Circuit Functions T4 – Shut Down to Alarm

All of the following are required:
Circuit States • A Circuit Fault is present

Table 58: Circuit States T5 – Start to Shut Down

State Description Any of the following are required:
Off Circuit is off. EXV is at 0.2%, solenoids are closed • Unit Enable = Off
and no fans or compressors running. • Circuit Enable = Disable
Start EXV is going through the preopen sequence. • A Circuit Fault is present
Run Circuit is running with at least one compressor.
Shut Down Circuit is going through shut down procedures. Can
T6 – Off to Alarm
transition to Off or Alarm. All of the following are required:
Alarm Circuit fault is active. • A Circuit Fault is present

Figure 35: Circuit State Transitions T7 – Alarm to Off

All of the following are required:
• No Circuit Faults are present

T8 – Shut Down to Off

All of the following are required:
• No Circuit Faults are present

Circuit Status
The displayed circuit status should be determined by the
conditions in the following table. If more than one status is
enabled at the same time the highest numbered status overrides
the others and is displayed.

# Status Conditions
0 None There is an initialization error.
1 Off:Ready Circuit is ready to start when needed.
T1 – Off to Start
2 Off:Cycle Circuit is off and cannot start due to
All of the following are required:
Timers active cycle timer on all compressors.
• Circuit Enable = Enable 3 Off:All Comp Circuit is off and cannot start due to all
• No Circuit Alarms active Disable compressors being disabled.
• There is at least one compressor available to start 4 Off:Keypad Circuit is off and cannot start due to
• Unit State = Auto Disable circuit enable set point.
5 Off:Circuit Circuit is off and circuit switch is off.
T2 – Start to Run
Switch
All of the following are required:
6 Off:Alarm Circuit is off and cannot start due to
• The EXV preopen procedure has finished active circuit alarm.
• The first compressor to start is running 7 Off:Test Mode Circuit is in test mode.

T3 - Run to Shut Down 8 Preopen Circuit is in preopen state.

9 Run:Pumpdown Circuit is in pumpdown state.
Any of the following are required:
10 Run:Normal Circuit is in run state and running
• Unit Enable = Off
normally.
• Circuit Enable = Disable
11 Run:Evap Circuit is running and cannot load due
• A Circuit Fault is present Press Low to low evaporator pressure.
• There are no compressors running on the circuit 12 Run:Cond Circuit is running and cannot load due
Press High to high condenser pressure.

DAIKIN APPLIED 52 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

Compressor Control T5 – Shut Down to Off

The AGZ Compressor class controls the compressors within the All of the following are required:
circuit it is instantiated. • Contactor is opened

Compressor State T6 – Off to Bump

All of the following are required:
Table 59: Compressor State
• Unit State = Test
State Description • Compressor bump initiated from the HMI
Off Compressor is off.
T7 – Bump to Shut Down
Start Compressor contactor is closed and the compressor
is starting. All of the following are required:
Run Compressor is running. • Three second bump timer expires
Shut Down Compressor contactor is opened, and the compressor
is stopping. Compressor Types
Alarm Compressor is on for a duration of three seconds then The AGZ-F compressors are single speed scrolls. The
turns itself off for testing. compressors can be different sizes, which are reflected in the
table below.
Figure 36: Compressor State Transitions
Table 60: Compressor Types

Compressor Code Nominal Horsepower

D 7.5
F 9.0
G 10
H 12
J 13
L 16
P 22
S 27
T1 – Off to Start U 40
All of the following are required: V 43
• Compressor Enable = Enable N No Compressor
• Start-Start timer expired
These individual compressor codes make up the unit compressor
• Capacity control initiates start code, an eight-letter representation of which compressors are on
the unit. For example, VVSNSSSN.
T2 – Start to Run
All of the following are required:
• Ten second start timer expires
• Contactor is closed

T3 - Run to Shut Down

Any of the following are required:
• Compressor Enable = Disable
• Capacity control initiates shut down

T4 – Start to Shut Down

Any of the following are required:
• Compressor Enable = Disable
• Capacity control initiates shut down

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Unit Controller Operation

Condenser Fan Control Condenser Types

Condenser fan control will activate and deactivate fans as There are three main categories of condenser configurations.
needed any time the circuit is the start or run state. All fans will
be off when the circuit is in the off or alarm state. There are All On/Off Fans (AF)
special cases when the fans will be on in the circuit start state.
The AF configuration contains only on/off fans. The fans are AC
Condenser fan digital outputs will be turned on or off immediately
induction type and are controlled via digital outputs to contactors
for condenser stage changes.
in the unit control box. In AF condenser configurations with a
The condenser is configured in the unit commissioning sequence more than four fans, the fans are put in groups and controlled
from the Unit Model and the Fan Code. by the four digital outputs. When groups of two or three stage
down, single, or double fan groups stage to compensate, so
Table 61: Condenser State every sequential stage changes the total condenser output by a
difference of one fan. The AF configuration is only designed to
State Description run at outdoor air temperatures of greater than 32°F.
Off All fans are off.
Start Condenser is starting.
First Fan ECM (DV)
Run Condenser is running, staging fans to target the con- The DV configuration contains one variable speed ECM fan, and
denser setpoint. the rest are on/off induction fans. The DV fans ramp up and down
Shut Down All fans are turned off.
as the on/off fans stage to smooth out the transitions.

Table 62: First Fan ECM

Figure 37: Condenser State Transitions

T1 – Off to Start
All of the following are required:
• Circuit State = Start

T2 – Start to Run
Any of the following are required:
• Circuit State = Run
• Outdoor Air Temperature > 80°F

T3 - Run to Shut Down Type Description Minimum Maximum Horsepower

All of the following are required: Speed Speed

• Circuit State is not Start DV DC Fan Motors 300 rpm 850 rpm 2 hp

• Circuit State is not Run

All ECM Fans (H[X])
T4 – Start to Shut Down H[X] represents a category of all ECM fans, there are multiple
All of the following are required: configurations within this category, represented by the variable
[X].
• Circuit State is not Start
• Circuit State is not Run Table 63: All ECM Fans
T5 – Shut Down to Off Type Description Minimum Maximum Horsepower
Speed Speed
All of the following are required:
HA High Static DC Fan 300 rpm 950 rpm 3 hp
• Commands to shut down fans sent Motors
HB High Static DC Fan 300 rpm 900 rpm 3 hp
Motors
DC DC Fan Motors 300 rpm 850 rpm 2 hp
DD DC Fan Motors 300 rpm 800 rpm 2 hp
DE DC Fan Motors 300 rpm 750 rpm 2 hp
DF DC Fan Motors 300 rpm 700 rpm 2 hp
DG DC Fan Motors 300 rpm 650 rpm 2 hp
DH DC Fan Motors 300 rpm 600 rpm 2 hp

DAIKIN APPLIED 54 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

Condenser Stages
Condenser staging on each refrigerant circuit will use up to 4
digital outputs for control of condenser fans. When equipped with
variable speed (ECM) condenser fans, the speed signal(s) sent
to the fans(s) via Modbus starts and stops the fan or fans. The
variable speed (ECM) fans do not use digital outputs.
The tables in the following sections show the output states for
each stage of condenser control with all the supported unit
configurations.

F Vintage Models - No ECM Fans (AF)

Table 64: 2 Fans - AF

Circuit 1
Description Output Contactor Fans Stage 1
Fan Output 1 UC NO2 K101 101 On
Circuit 2
Description Output Contactor Fans Stage 1
Fan Output 1 UC NO7 K201 201 On

Table 65: 4 Fans - AF

Circuit 1
Stage
Description Output Contactor Fans
1 2
Fan Output 1 UC NO2 K101 101 On On
Fan Output 2 UC NO3 K102 102 On
Circuit 2
Stage
Description Output Contactor Fans
1 2
Fan Output 1 UC NO7 K201 201 On On
Fan Output 2 UC NO8 K202 202 On

Table 66: 6 Fans - AF

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4
Fan Output 1 UC NO2 K101 101 On On On On
Fan Output 3 UC NO5 K103 102 On On
Fan Output 2 UC NO3 K102 103 On On
Fan Output 3 UC NO6 K103 104 On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4
Fan Output 1 UC NO7 K201 201 On On
Fan Output 2 UC NO8 K202 202 On

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Unit Controller Operation

Table 67: 8 Fans - AF

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4
Fan Output 1 UC NO2 K101 101 On On On On
Fan Output 3 UC NO6 K103 102 On On
Fan Output 2 UC NO3 K102 103 On On
Fan Output 3 UC NO6 K103 104 On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4
Fan Output 1 UC NO7 K201 201 On On On On
Fan Output 3 UC NO11 K203 202 On On
Fan Output 2 UC NO8 K202 203 On On
Fan Output 3 UC NO11 K203 204 On On

Table 68: 10 Fans - AF - 4 Compressors

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Fan Output 1 UC NO2 K101 101 On On On On
Fan Output 3 UC NO6 K103 102 On On On
Fan Output 2 UC NO3 K102 103 On On On On
Fan Output 3 UC NO6 K103 104 On On On
Fan Output 2 UC NO3 K102 105 On On On On
Fan Output 3 UC NO6 K103 106 On On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Fan Output 1 UC NO7 K201 201 On On On On
Fan Output 3 UC NO11 K203 202 On On
Fan Output 2 UC NO8 K202 203 On On
Fan Output 3 UC NO11 K203 204 On On

Table 69: 10 Fans - AF - 6 Compressors

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Fan Output 1 UC NO2 K101 101 On On On On
Fan Output 3 UE2 NO1 K103 102 On On On
Fan Output 2 UC NO3 K102 103 On On On On
Fan Output 3 UE2 NO1 K103 104 On On On
Fan Output 2 UC NO3 K102 105 On On On On
Fan Output 3 UE2 NO1 K103 106 On On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Fan Output 1 UC NO7 K201 201 On On On On
Fan Output 3 UC NO11 K203 202 On On
Fan Output 2 UC NO8 K202 203 On On
Fan Output 3 UC NO11 K203 204 On On

DAIKIN APPLIED 56 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

Table 70: 12 Fans - AF - 4 Compressors

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Fan Output 1 UC NO2 K101 101 On On On On
Fan Output 3 UC NO6 K103 102 On On On
Fan Output 2 UC NO3 K102 103 On On On On
Fan Output 3 UC NO6 K103 104 On On On
Fan Output 2 UC NO3 K102 105 On On On On
Fan Output 3 UC NO6 K103 106 On On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Fan Output 1 UC NO7 K201 201 On On On On
Fan Output 3 UC NO11 K203 202 On On On
Fan Output 2 UC NO8 K202 203 On On On On
Fan Output 3 UC NO11 K203 204 On On On
Fan Output 2 UC NO8 K202 205 On On On On
Fan Output 3 UC NO11 K203 206 On On On

Table 71: 12 Fans - AF - 6 Compressors

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Fan Output 1 UC NO2 K101 101 On On On On
Fan Output 3 UE2 NO1 K103 102 On On On
Fan Output 2 UC NO3 K102 103 On On On On
Fan Output 3 UE2 NO1 K103 104 On On On
Fan Output 2 UC NO3 K102 105 On On On On
Fan Output 3 UE2 NO1 K103 106 On On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Fan Output 1 UC NO7 K201 201 On On On On
Fan Output 3 UE2 NO4 K203 202 On On On
Fan Output 2 UC NO8 K202 203 On On On On
Fan Output 3 UE2 NO4 K203 204 On On On
Fan Output 2 UC NO8 K202 205 On On On On
Fan Output 3 UE2 NO4 K203 206 On On On

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Unit Controller Operation

Table 72: 14 Fans - AF

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4 5 6 7 8
Fan Output 1 UC NO2 K101 101 On On On On On
Fan Output 3 UE2 NO1 K103 102 On On On On On
Fan Output 2 UC NO3 K102 103 On On On On On On
Fan Output 3 UE2 NO1 K103 104 On On On On On
Fan Output 2 UC NO3 K102 105 On On On On On On
Fan Output 3 UE2 NO1 K103 106 On On On On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4 5 6 7 8
Fan Output 1 UC NO7 K201 201 On On On On
Fan Output 3 UE2 NO4 K203 202 On On On
Fan Output 2 UC NO8 K202 203 On On On On
Fan Output 3 UE2 NO4 K203 204 On On On
Fan Output 2 UC NO8 K202 205 On On On On
Fan Output 3 UE2 NO4 K203 206 On On On

DAIKIN APPLIED 58 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

F Vintage Model - First Fan ECM (DV)

Table 73: 2 Fans - DV

Circuit 1
Description Output Contactor Fans Stage 1
Speed Signal 1 Modbus n/a 101 On
Circuit 2
Description Output Contactor Fans Stage 1
Speed Signal 1 Modbus n/a 201 On

Table 74: 4 Fans - DV

Circuit 1
Stage
Description Output Contactor Fans
1 2
Speed Signal 1 Modbus n/a 101 On On
Fan Output 2 UC NO2 K101 102 On
Circuit 2
Stage
Description Output Contactor Fans
1 2
Speed Signal 1 Modbus n/a 201 On On
Fan Output 2 UC NO7 K201 202 On

Table 75: 6 Fans - DV

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4
Speed Signal 1 Modbus n/a 101 On On On On
Fan Output 3 UC NO3 K102 102 On On
Fan Output 2 UC NO2 K101 103 On On
Fan Output 3 UC NO3 K102 104 On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4
Speed Signal 1 Modbus n/a 201 On On
Fan Output 2 UC NO7 K201 202 On

Table 76: 8 Fans - DV

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4
Speed Signal 1 Modbus n/a 101 On On On On
Fan Output 3 UC NO3 K102 102 On On
Fan Output 2 UC NO2 K101 103 On On
Fan Output 3 UC NO3 K102 104 On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4
Speed Signal 1 Modbus n/a 201 On On On On
Fan Output 3 UC NO8 K202 202 On On
Fan Output 2 UC NO7 K201 203 On On
Fan Output 3 UC NO8 K202 204 On On

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Unit Controller Operation

Table 77: 10 Fans - DV - 4 Compressors

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Speed Signal 1 Modbus n/a 101 On On On On On
Fan Output 4 NO6 K103 102 On On On
Fan Output 2 NO2 K101 103 On On On
Fan Output 4 NO6 K103 104 On On On
Fan Output 3 NO3 K102 105 On On On On
Fan Output 3 NO3 K102 106 On On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Speed Signal 1 Modbus n/a 201 On On On On
Fan Output 3 NO8 K202 202 On On
Fan Output 2 NO7 K201 203 On On
Fan Output 3 NO8 K202 204 On On

Table 78: 10 Fans - DV - 6 Compressors

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Speed Signal 1 Modbus n/a 101 On On On On On On
Fan Output 4 UE2 NO1 K103 102 On On
Fan Output 2 NO2 K101 103 On On On
Fan Output 4 UE2 NO1 K103 104 On On
Fan Output 3 NO3 K102 105 On On On On
Fan Output 3 NO3 K102 106 On On On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Speed Signal 1 Modbus n/a 201 On On On On
Fan Output 3 UC NO8 K202 202 On On
Fan Output 2 UC NO7 K201 203 On On
Fan Output 3 UC NO8 K202 204 On On

Table 79: 12 Fans - DV - 4 Compressors

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Speed Signal 1 Modbus n/a 101 On On On On On On
Fan Output 3 UC NO6 K103 102 On On
Fan Output 2 UC NO3 K101 103 On On On
Fan Output 3 UC NO6 K103 104 On On
Fan Output 2 UC NO3 K102 105 On On On On
Fan Output 3 UC NO6 K102 106 On On On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Speed Signal 1 Modbus n/a 201 On On On On On On
Fan Output 3 UC NO11 K203 202 On On On On
Fan Output 2 UC NO8 K201 203 On On On
Fan Output 3 UC NO11 K203 204 On On On On
Fan Output 2 UC NO8 K202 205 On On
Fan Output 3 UC NO11 K202 206 On On

DAIKIN APPLIED 60 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

Table 80: 12 Fans - DV - 6 Compressors

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Speed Signal 1 Modbus n/a 101 On On On On On On
Fan Output 3 UE2 NO1 K103 102 On On
Fan Output 2 UC NO3 K101 103 On On On
Fan Output 3 UE2 NO1 K103 104 On On
Fan Output 2 UC NO3 K102 105 On On On On
Fan Output 3 UE2 NO1 K102 106 On On On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4 5 6
Speed Signal 1 Modbus n/a 201 On On On On On On
Fan Output 3 UE2 NO4 K203 202 On On On On
Fan Output 2 UC NO8 K201 203 On On On
Fan Output 3 UE2 NO4 K203 204 On On On On
Fan Output 2 UC NO8 K202 205 On On
Fan Output 3 UE2 NO4 K202 206 On On

Table 81: 14 Fans - DV

Circuit 1
Stage
Description Output Contactor Fans
1 2 3 4 5 6 7 8
Speed Signal 1 Modbus n/a 101 On On On On On On ON On
Fan Output 5 UE2 NO2 K104 102 On On On On
Fan Output 2 UC NO2 K101 103 On On On On
Fan Output 5 UE2 NO2 K104 104 On On On On
Fan Output 3 UC NO3 K102 105 On On On On On On
Fan Output 4 UE2 NO1 K103 106 On On
Fan Output 3 UC NO3 K102 107 On On On On On On
Fan Output 4 UE2 NO1 K103 108 On On
Circuit 2
Stage
Description Output Contactor Fans
1 2 3 4 5 6 7 8
Speed Signal 1 Modbus n/a 201 On On On On On On
Fan Output 3 UE2 NO4 K203 202 On On On On
Fan Output 2 UC NO7 K201 203 On On On
Fan Output 3 UE2 NO4 K203 204 On On On On
Fan Output 2 UC NO8 K202 205 On On
Fan Output 3 UC NO8 K202 206 On On

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Unit Controller Operation

Condenser Target Condenser Target for DV and H[X]

The condenser target varies for the type of condenser. The Configurations (Variable Speed)
controlled variable that the condenser is targeting is the saturated The condenser target for DV and H[X] configurations is selected
condenser temperature. The controlled device in this case is based on circuit capacity, outdoor air temperature, and the
condenser output, with the controlled agent being refrigerant in compressor envelope for the most conservative compressor in
the condenser. the product line. The primary target is calculated from a curve
For all configurations in all conditions, the condenser target developed for maximizing efficiency of the form:
is 100°F for the first 60 seconds after starting the condenser.
This has two purposes. For low ambient conditions, the circuit
must build suction head pressure to achieve a successful low
ambient start. During this process, if a condenser fan stages up,
it will knock the suction pressure down making it more difficult to Where Optimum Tccircuit x is in Fahrenheit, outdoor air
successfully start. At low ambient, the condenser target is often temperature is in Fahrenheit, and nominal capacity is in nominal
well below 100°F on startup (see below sections). Setting the horsepower calculated:
target to 100°F forces the condenser fans to wait longer than
they would otherwise wait before staging up. At high ambient, the
condenser target is often well above 100°F (see below sections).
With a high target, the fans may wait too long to stage up. In
other words, the discharge pressure might rise to a fault level Simultaneously, using the compressor envelope of the most
before the condenser saturated temperature reaches a value conservative compressor in the product line, a minimum bound
where the fans would stage up. Once the 60 second timer is for the condenser target is calculated:
complete, the target goes right to the value calculated as outlined
in the sections below.

Condenser Target for AF Configurations The 20°F is added as a buffer to make sure that even if the Tc
overshoots below the target, the compressor is not in danger of
(Fantrol) leaving the envelope. The condenser target takes the maximum
The condenser target for AF configurations is selected based on value of the two, the optimum Tc and the lower bound Tc. This
circuit capacity using the condenser target set points. Since the makes it so the target Tc is never outside of the compressor
AF configuration has a lower resolution for targeting a setpoint, envelope.
more conservative targets are used. There are set points that The calculated condenser target is capped at a high bound of
establish the condenser target for part load and 100% capacity. 133°F. A 133°F saturated condenser temperature correlates to a
Load Range discharge pressure of about 509.4 PSI (gauge). If the discharge
pressure is higher than 515 PSI (gauge), the circuit will not have
Part Load 90.0°F
room to start another compressor. When looking to stage up a
Full Load 100.0°F compressor, capacity control monitors discharge pressure and
A minimum condenser target will also be enforced. This minimum will not stage up that circuit is the pressure is higher than 515
will be calculated based on the saturated evaporator temperature PSI. This cap makes it so the condenser fans will ramp to 100%
and is designed to keep the compressors within their envelopes. output to keep the discharge pressure below 515 PSI to allow
more compressors to start.
The 20°F is added as a buffer to make sure that even if the Tc
overshoots below the target, the compressor is not in danger of
leaving the envelope. The condenser target takes the maximum
value of the two, the target and the lower bound Tc. This makes it
so the target Tc is never outside of the compressor envelope.

DAIKIN APPLIED 62 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

Staging Up H[X]
In an H[X] high ambient start, the goal is to turn all available
Regular State Up Logic ECM fans on. This allows the fans to skip staging up individually
The first fan will not start until the circuit is in the run state and the and go directly to their most efficient stage for high ambient. If
stage up error has accumulated past the limit. The only exception the outdoor air temperature is greater than 105°F, the fan speed
to this is a high ambient start (special stage up case #1). setpoint is set to the maximum speed. Otherwise, the fan speed
is set to the minimum speed. In the latter case, once at minimum
When the saturated condenser temperature is above the target
speed the fans can ramp up together to the max speed if needed
plus the active deadband, stage up error is accumulated.
to hit the condenser target.

The Stage Up Error Step is added to a Stage Up Accumulator Low Ambient Starts and Staging
once every 5 seconds, only if the Saturated Condenser On units with ECM fans (DV and H[X]), if the ambient
Refrigerant Temperature is not falling. When Stage Up Error temperature is less than 50°F when the first fan is staged on,
Accumulator is greater than the Stage Up Limit the fan stage the speed command is held at the minimum for 5 seconds
is increased by one stage if the stage up timer has expired. If after staging the first fan on. This mitigates windup in the PID
the chiller is in a low ambient condition the low ambient staging integrator term as the fan ramps up to its minimum speed. Since
conditions must be satisfied (see low ambient starts and staging there is a delay in condenser temperature change between when
section). the fan is activated and when it has ramped up to speed, the PID
loop sees this as a need to increase output, the condenser output
Outdoor Air < 20 20-50 50-80 80-110 >110 could overshoot the target and cause an unnecessary drop in
Temperature (°F)
suction pressure.
Stage Up Dead- 5.0 5.0 5.0 5.0 5.0
band (°F) Another low ambient consideration on units with AF and DV
Stage Down 30.0 23.0 29.8 19.8 15.0
configurations is when a sequential compressor starts and the
Deadband (°F) saturated condenser temperature increases, the regular stage up
logic may call an additional on/off fan to stage up. This additional
The only exception to the above table is if there are no fans fan is often too much condenser output at low temperatures and
running on a circuit (circuit just started). causes a compressor to stage down on low suction pressure
Outdoor Air Temperature (°F) All
unloading. Units with the AF and DV configurations at ambient
temperatures under 30F with at least one fan already running
Stage Up Deadband (°F) 1.0 must wait to stage up until the output term of the PID loop is
Stage Down Deadband (°F) 1.0 greater than 90%. This allows extra time before staging up
an additional fan to bring the condenser temperature back
High Ambient Starts to the target area at the current stage. Even if the condenser
When a circuit is called to start, if the saturated condenser configuration is AF, the PID loop still runs in the background, so
temperature is greater than 90°F before the preopen sequence, a this logic still holds true.
high ambient start is initiated.
Skipping First Stage
AF and DV • Case 1: If the circuit has 4 or more fans and OAT is at
In an AF or DV high ambient start, the goal is to have the first least 21.11°C (70°F) when the first condenser stage would
one or two fans on the circuit running at maximum capacity normally be started.
before the compressor is turned on. In the high ambient start • Case 2: If the circuit has an H[X] configuration and OAT is
logic, the stage up accumulation term is overridden and set to at least 10° (50°F) when the first condenser stage would
the limit value, triggering an immediate stage up. By triggering normally be started.
a regular stage up by maxing out the stage up accumulator, the • Case 3: If the circuit has a DV configuration and OAT is at
logic evaluates if a “skipping first stage” case should be utilized least 65°F when the first condenser stage would normally
(see section below). In most cases this results in the condenser be started.
skipping the first stage. Another feature of the high ambient start • Case 4: If the circuit has an AF configuration and OAT is at
is that the PID output to the ECM fans (if applicable) is overridden least 100°F when the first condenser stage would normally
and set to the maximum value. By setting the fan output to the be started.
maximum before the compressor starts, the fans have time to
ramp up in time to curb the discharge pressure rise. If the outdoor
air temperature is greater that 105°F, all fans are staged up
immediately.

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Unit Controller Operation

Additional Stage Up Triggers EXV Control

• Trigger 1: If the stage up timer has not expired but: EXV control has three distinct run time modes. Under normal
— The saturated condenser temperature is greater than conditions, the EXV targets SSH. When the evaporator pressure
134°F is too low for the condition, the EXV switches to Pressure Control
— The saturated condenser temperature is rising where it targets a higher pressure. If the evaporator pressure is
too high for the condition, for example high LWT, the EXV targets
— 5 seconds have passed since the previous stage up
just below the maximum operating pressure of the evaporator to
avoid a dangerous condition. In SSH mode blends into the other
Staging Down two modes for a smooth transition between states.
Regular State Up Logic
Table 82: EXV Control States
When the saturated condenser refrigerant temperature is below
the target minus the active deadband, stage down error is EXV Control State Description
accumulated. Closed EXV is closing or in the closed position
Preopen EXV is opening prior to compressor start
The Stage Down Error Step is added to Stage Down Accumulator Static Start EXV constricts flow 5% less than preopen
once every 5 seconds. When the Stage Down Error Accumulator position to build a liquid seal
is greater than the Stage Down Limit the fan stage is decreased Pressure Control EXV is controlling to evaporator pressure
by one stage if the stage down timer has expired. target in low pressure situation

When a stage down occurs or the saturated temperature rises MOP Control EXV is controlling to evaporator MOP target in
high pressure situation
back above the target minus the Stage Down dead band, the
Stage Down Error Accumulator is reset to zero. SSH Control EXV is controlling to suction superheat target
in a normal situation
The stage down timer is 60 seconds divided by the number of
fans on the circuit. The stage down deadband and limit do not
Figure 38: EXV Control Transitions
vary with conditions:

Outdoor Air Temperature (°F) All

Stage Down Deadband (°F) 5.0
Stage Down Limit (°F) 6.0

Variable Speed Fan Control

Condenser configurations of DV and H[X] have variable speed
fan control.

Speed Setpoint Calculations

The speed command is calculated using a PID loop targeting T1 – Closed to Preopen
the condenser saturated temperature target. The control loop All of the following are required:
monitors condenser temperature slope, and if the temperature is
• Circuit State = Start
moving toward the target at a fast enough rate, the PID loop will
be frozen to allow the change in temperature to stabilize before T2 – Preopen to Static Start
changing fan speed again. If a circuit has more than one variable
speed fan, all variable speed fans on the circuit are run at the Any of the following are required:
same speed. • Liquid Line Solenoid = Engaged
• EXV Position = Preopen Position
Staging Compensation • Ten second Preopen timer has expired
To create a smoother transition when the condenser stages up,
the speed command compensates by slowing down initially. This T3 – Static Start to SSH Control
is accomplished by setting the speed command to the minimum All of the following are required:
speed when a fan is stages up, and the maximum speed when a
fan is staged down. After the fan speed is changed the PID loop • EXV Position = Preopen Position – 5.0 %
takes over again. • Fifteen second Static Start timer has expired

DAIKIN APPLIED 64 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

T4 – SSH Control to MOP Control Preopen Position Calculations

All of the following are required: The preopen position of the EXV depends on the expected
• Evaporator Pressure > (Evaporator Maximum Operating mass flow at the start of the system. The factors that affect
Pressure Setpoint – 10.0 PSI) mass flow the greatest are outdoor ambient temperature and
starting entering water temperature. The function takes these two
T5 – MOP Control to SSH Control parameters as inputs and returns a preopen position.
All of the following are required: • Preopen Position Range: 20-30% (Large EXV), 35-45%
(Small EXV)
• Evaporator Pressure < (Evaporator Maximum Operating
Pressure Setpoint – 10.0 PSI) • Outdoor Ambient Temperature Range (OAT): 60-90F
• Two minute maximum operating pressure control timer has • Starting Entering Water Temperature Range (EWT): 60-
expired 100F
Take the higher of the two.
T6 – SSH Control to Pressure Control
For the Larger EXV:
All of the following are required:
• Evaporator Pressure < (Evaporator Pressure Control Target
– 25.0 PSI)
• One minute suction superheat control timer has expired

T7 – Pressure Control to SSH Control

All of the following are required:
For the Smaller EXV:
• Evaporator Pressure > Evaporator Pressure Hold Setpoint
• Thirty second pressure control timer has expired
• The slope of the evaporator delta T is within plus or minus
two degrees per minute
• Or Any of the following are required:
• Suction Superheat < 5°F

T8 – Pressure Control to MOP Control If the calculation returns a value outside of the EXV preopen
range, the closest value inside of the range will be taken. This
All of the following are required:
ensures the preopen position is always inside of the range.
• Evaporator Pressure > Evaporator Pressure Hold Setpoint
• Evaporator Pressure > (Evaporator Maximum Operating Control Error Calculations
Pressure Setpoint – 10.0 PSI)
Regardless of the EXV control state, control error calculations are
T9 – SSH Control to Closed made for Pressure Control, SSH Control, and MOP Control. The
error equation is as follows:
All of the following are required:
• Circuit State is not Start
• Circuit State is not Run

T10 – Pressure Control to Closed

All of the following are required:
• Circuit State is not Start
• Circuit State is not Run

T11 – MOP Control to Closed

All of the following are required:
• Circuit State is not Start
• Circuit State is not Run

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Unit Controller Operation

Pressure Control Target Figure 40: EXV Control Modes

The pressure control target setpoint is dynamic and depends on

leaving water temperature. Bounds: high range: 65°F, 180 PSI
low range: 32°F, 93 PSI.

Figure 39: Pressure Control Target

Figure 41: Close up of Blended Region

Maximum Operating Pressure Control

Target
The maximum operating pressure control target is always the
maximum operating pressure setpoint – 10 PSI.

Suction Superheat Control Target

The suction superheat control target is set via the HMI by the end
user/technician. Valid targets are around 5°F to 15°F. NOTICE
Blended transitions between EXV modes help with stability.
Position Change Calculations
Regardless of the EXV control state, position change calculations Liquid Line Solenoid
are made for Pressure Control, SSH Control, and MOP Control.
The current EXV control state determines which position change The liquid line solenoid is activated when the circuit state is in
is applied. either the START or RUN states. This output should be off at all
other times.
The control states, Pressure Control, SSH Control, and MOP
Control, each have their own independent PID loops. The
output of these loops is calculated every program cycle for use
Hot Gas Bypass Solenoid
in control state transitions. In addition to proportional, integral, A hot gas bypass solenoid is only activated when there is one
and derivative gains, there are a couple of additional features compressor running on the entire unit. The circuit that is running
to increase stability. There is a small SSH dead band to allow activates its hot gas bypass solenoid. The hot gas bypass
the SSH to settle close to the setpoint in the case of the EXV solenoid is only activated if the leaving water temperature is two
resolution being too large to match the target precisely under degrees above the leaving water temperature target or less. If
the circumstances. For SSH and pressure control, there is a additional compressors are staged on or the chiller is shut off the
slope locking feature that will lock the EXV in position while the hot gas bypass valve will immediately deactivate.
measured value is moving towards the setpoint at a certain rate.
This helps prevent unstable overshoot. Below is an illustration Capacity Overrides - Limit of Operation
showing the EXV control modes.
The following conditions shall override automatic capacity control
as described. These overrides keep the circuit from entering a
condition in which it is not designed to run.

Low Evaporator Pressure

If the Low Evaporator Pressure Hold or Low Evaporator Pressure
Unload events are triggered, the circuit capacity may be limited
or reduced.

DAIKIN APPLIED 66 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

High Condenser Pressure Alarms

If the High Condenser Pressure Unload event is triggered, the
circuit capacity may be limited or reduced. Unit Alarms Summary
This table lists all the unit alarms. For further details about each
High Transformer Temperature alarm, see the following sections. For details on auto clear see
On unit equipped with a transformer, if the ambient temperature the section below.
inside of the transformer housing reaches a value greater than
the setpoint, unit capacity may be limited or reduced. Table 83: Unit Alarm Summary

Alarm and Events No. Unit Alarm Type Action Manual

Clear
1 Unit PVM/GFP Fault Unit Shut- Controller
Alarm Digital Output Fault down HMI or BAS
The alarm digital output will be operated based on active alarm 2 Evaporator Flow Fault Unit Shut- Controller
scenarios as shown in the table below. Loss down HMI or BAS
3 Evaporator Water Fault Unit Shut- Controller
State Scenario Freeze Protect down HMI or BAS
Off No alarms preventing the chiller or an individual circuit from 4 Evaporator LWT Fault Unit Shut- Controller
running Sensor Fault down HMI or BAS
On A fault is preventing the chiller or either circuit from running 5 Evaporator EWT Warning None n/a
Sensor Fault
List and Logs 6 OAT Sensor Fault Fault Unit Shut- Controller
down HMI or BAS
Active Alarms List 7 External Alarm Warning Unit Shut- n/a
down
All alarms appear in the active alarm list while active. This active
alarm list is accessed by pressing the alarm icon at the top right 8 Evaporator Pump Problem Backup Controller
#1 Failure pump is HMI or BAS
of the HMI. The alarm icon will flash when there are alarms used
active. The alarm list will display the six highest priority alarms.
The format of the entries in this list is found in the User Interface 9 Evaporator Pump Problem Backup Controller
#2 Failure pump is HMI or BAS
section of this document where the layout and format of the used
screens is specified.
10 External Event Fault Unit Shut- Controller
down HMI or BAS
Alarm Log
11 Bad Demand Warning Demand n/a
All alarms are added to the alarm log when triggered. This alarm Limit Input Limit Ig-
log will be found on the ‘Alarm Log’ screen. This log can be nored
downloaded as a CSV file through the ‘Trend’ page. 12 Bad LWT Reset Warning LWT Reset n/a
Input Ignored
The format of the entries in this list is found in the User Interface
section of this document where the layout and format of the 13 Transformer Fault Unit Shut- Controller
Overtemperature down HMI or BAS
screens is specified.
Fault

Event Log 14 Transformer Problem Transform- Controller

Temp Sensor er Unload HMI or BAS
The event log should be set up and behave in a way similar to Error Ignored
the alarm log. 15 Peripheral Mod- Fault Unit Shut- Controller
ule Comm Failure down HMI or BAS
Sort order should be based on time and date, most recent first in
the log. All events will be added to the event log when triggered.

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Unit Controller Operation

Circuit Alarm Summary Alarm Detail Explanation

This table lists all the circuit alarms, which will exist for each Details for each alarm are listed in a table format as shown
circuit. For further details about each alarm, see the following below. The table below briefly explains each row in the tables.
sections.
Alarm Description of Alarm
Table 84: Circuit Alarm Summary Type Category the alarm should be configured as per the
GCP (fault/problem/warning).
Display Text to be displayed on HMI in the alarm lists.
No. Unit Alarm Type Action Manual Text
Clear
Alarm Alarm message parts that should be generated for the
1 Circuit PVM/GFP Fault Circuit Controller Parts alarm per the GCP.
Fault Shutdown HMI or BAS
Message Module Module ID Payload
2 Low Evaporator Fault Circuit Controller Code Type
Pressure Shutdown HMI or BAS
GCP Reference ID Corre- Additional
3 High Condenser Fault Circuit Controller Alarm Table sponding to Alarm In-
Pressure Shutdown HMI or BAS Index Below Module Type formation
5 Mechanical High Fault Circuit Controller Alarm Alarm code that should be generated for the alarm per
Pressure Switch Shutdown HMI or BAS Code the GCP.
6 Mechanical Low Fault Circuit Controller Trigger Conditions required to trigger the alarm.
Pressure Switch Shutdown HMI or BAS
Action Actions that should be taken when the alarm triggers.
7 Motor Protection Fault Circuit Controller Taken
Fault Shutdown HMI or BAS
Reset Conditions required for clearing. Method for clearing
8 Low OAT Restart Fault Circuit Controller defined in the auto clear section below.
Fault Shutdown HMI or BAS
9 No Pressure Fault Circuit Controller Module Type Information
Change After Start Shutdown HMI or BAS
10 Low Suction SH Fault Circuit Controller # Module Associated Module Associated Payloads
Type IDs
Fault Shutdown HMI or BAS
1 Unit “0”: Unit “0”: “None”
11 Low Condenser Fault Circuit Controller
Sat. Temperature Shutdown HMI or BAS 3 Fans “11”: Fan 1 on Circuit 1, “0”: “Modbus Communication
Error”,
12 Evaporator Pres- Fault Circuit Controller “12”: Fan 2 on Circuit 1,
sure Sensor Fault Shutdown HMI or BAS “1”: “Short Circuit Fault”,
“13”: Fan 3 on Circuit 1,
“2”: “Motor Stalled Fault”,
13 Condenser Pres- Fault Circuit Controller “14”: Fan 4 on Circuit 1,
sure Sensor Fault Shutdown HMI or BAS “15”: Fan 5 on Circuit 1,
“3”: “Module NTC Fault”,

14 Suction Tempera- Fault Circuit Controller “4”: “Module Over Temp

“16”: Fan 6 on Circuit 1,
ture Sensor Fault Shutdown HMI or BAS Fault”,
“17”: Fan 7 on Circuit 1,
“5”: “Bus Over Voltage
15 Discharge Tem- Fault Circuit Controller Fault”,
“18”: Fan 8 on Circuit 1,
perature Sensor Shutdown HMI or BAS
Fault “21”: Fan 1 on Circuit 2, “6”: “Bus Low Voltage Fault”,

16 High Discharge Fault Circuit Controller “22”: Fan 2 on Circuit 2, “7”: “Output Phase Lost
Fault”,
Temperature Shutdown HMI or BAS “23”: Fan 3 on Circuit 2,
“8”: “Input Phase Lost Fault”,
17 EEXV Module Fault Circuit Controller “24”: Fan 4 on Circuit 2,
Comm Failure Shutdown HMI or BAS “9”: “Overload Fault”,
“25”: Fan 5 on Circuit 2,
“10”: “Comm Fail Fault”,
18 DC Fan Fault Problem Ignore Controller “26”: Fan 6 on Circuit 2
Affected Fan HMI or BAS “11”: “Bus Unbalance Fault”,
“12”: “AC Low Fault”,
“13”: “AC High Fault”,
“14”: “External Fault”,
“15”: “EEPROM Fault”,
“16”: “Inner Comm Fault”,
4 cpCOe “1”: Expansion “0”: “None”
Expansion Module – Sensor Box
Module (UE01)
5 Sensor “0”: Unit, “0”: “None”
“1”: Circuit 1,
“2”: Circuit 2

DAIKIN APPLIED 68 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

# Module Associated Module Associated Payloads Evaporator Water Freeze Protect

Type IDs
6 EXV “0”: Dual EXV Driver, “0”: “None”
Alarm Evaporator Water Freez Protect

“1”: Circuit 1 EXV, Type Fault

“2”: Circuit 2 EXV Displayed Evaporator Water Freeze Protect
Text
7 BAS Ex- “0”: Expansion Module “0”: “None”
pansion – Main Box (UE02) Alarm Parts Message Module Module Payload
Module Code Type ID
8 Circuit “1”: Circuit 1, “0”: “None”, 151 1 0 0
“2”: Circuit 2 “1”: “Ground Fault Monitor”,
Alarm Code 2533425152
“2”: “Phase Voltage Monitor”
Trigger [Evaporator LWT drops below evaporator freeze
100 PC “0”:Unit “0”:”None” protect set point and LWT sensor fault is not active]
for a time longer than the evaporator recirculation
time set point
PVM/GFP Fault
Action Taken Shutdown all circuits and lock out unit from running
Alarm PVM/GFP Fault
Reset Alarm trigger no longer exists – Cannot be auto
Type Fault cleared
Displayed PVM/GFP Fault
Text Evaporator LWT Sensor Fault
Alarm Parts Message Module Module Payload
Alarm Evaporator LWT Sensor Fault
Code Type ID
Type Warning
228 1 0 1
Displayed Evaporator LWT Sensor Fault
Alarm Code 3825270785
Text
Trigger Alarm is trigged if all of the following are true for at
Alarm Parts Message Module Module Payload
least one second:
Code Type ID
-Power Configuration = Single Point
162 5 0 0
-PVM/GFP Input #1 is off
Alarm Code 2718236672
Action Taken Shutdown all circuits and lock out unit from running
Trigger Trigger any time sensor status is other than “10”
Reset Reset when input is on for at least 5 seconds or if and UC01 communication with UE01 module is OK,
Power Configuration = Multi Point for at least one second
Action Taken Shutdown all circuits and lock out unit from running
Evaporator Flow Loss Reset Sensor status returns to “10”
Alarm Evaporator Flow Loss
Type Fault
Evaporator EWT Sensor Fault
Displayed Evaporator Flow Loss Alarm Evaporator EWT Sensor Fault
Text
Type Warning
Alarm Parts Message Module Module Payload
Displayed Evaporator Water Freeze Protect
Code Type ID
Text
150 1 0 0
Alarm Parts Message Module Module Payload
Alarm Code 2516647936 Code Type ID
Trigger 1: Evaporator Pump State = Run AND Evaporator 2 5 0 0
Flow input is off for time > Flow Proof Set Point AND
Alarm Code 33882112
at least one compressor running
2: Evaporator Pump State = Start for time greater Trigger Trigger any time sensor status is other than “10”
than Recirc Timeout Set Point and all pumps have and UC01 communication with UE01 module is OK,
been tried and Evaporator Flow input is off for at least one second

Action Taken Shutdown all circuits and lock out unit from running Action Taken Ignore sensor value in applicable calculations

Reset Alarm trigger no longer exists Reset Sensor status returns to “10”

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Unit Controller Operation

OAT Sensor Fault Evaporator Pump #2 Failure

Alarm OAT Sensor Fault Alarm Evaporator Pump #2 Failure
Type Warning Type Fault
Displayed OAT Sensor Fault Displayed Evaporator Pump #2 Failure
Text Text
Alarm Message Module Module Payload Alarm Message Module Module Payload
Parts Code Type ID Parts Code Type ID
128 5 0 0 81 1 0 0
Alarm 2147811328 Alarm 1375797248
Code Code
Trigger Trigger any time sensor status is other than “10” and Trigger Unit is configured with primary and backup pumps,
UC01 communication with UE01 module is OK, for at pump #2 is running, and the pump control logic switch-
least one second es to pump #1
Action Shutdown all circuits and lock out unit from running Action Backup pump is used
Taken Taken
Reset Sensor status returns to “10” Reset This alarm can be cleared manually via the controller
HMI or BAS command
External Alarm
External Event
Alarm External Alarm
Alarm External Event
Type Fault
Type Fault
Displayed External Alarm
Text Displayed External Event
Text
Alarm Message Module Module Payload
Parts Code Type ID Alarm Message Module Module Payload
Parts Code Type ID
194 1 0 0
13 1 0 0
Alarm 3254845440
Code Alarm 218169344
Code
Trigger External Alarm/Event input is off for at least 5 seconds
and external fault input is configured as a fault Trigger External Alarm/Event input is off for at least 5 seconds
and external fault input is configured as a warning
Action Shutdown all circuits and lock out unit from running
Taken Action None
Taken
Reset Alarm trigger no longer exists

Evaporator Pump #1 Failure Bad Demand Limit Input

Alarm Bad Demand Limit Input
Alarm Evaporator Pump #1 Failure
Type Warning
Type Fault
Displayed Bad Demand Limit Input
Displayed Evaporator Pump #1 Failure
Text
Text
Alarm Message Module Module Payload
Alarm Message Module Module Payload
Parts Code Type ID
Parts Code Type ID
9 1 0 0
81 1 0 0
Alarm 151060480
Alarm 1359020032
Code
Code
Trigger Demand limit input out of range and Demand Limit
Trigger Unit is configured with primary and backup pumps,
set point is set to On. For this alarm out of range is
pump #1 is running, and the pump control logic switch-
considered to be a signal less than 3mA or more than
es to pump #2
21mA
Action Backup pump is used
Action Demand limit function and signal are ignored
Taken
Taken
Reset This alarm can be cleared manually via the controller
Reset Demand Limit set point is set to Off or demand limit
HMI or BAS command
input back in range for 5 seconds

DAIKIN APPLIED 70 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

Bad LWT Reset Input Transformer Temperature Sensor Error

Alarm Transformer Temperature Sensor Error
Alarm Bad LWT Reset Input
Type Fault
Type Warning
Displayed Transformer Temperature Sensor Error
Displayed Bad LWT Reset Input
Text
Text
Alarm Message Module Module Payload
Alarm Message Module Module Payload
Parts Code Type ID
Parts Code Type ID
246 5 0 0
8 1 0 0
Alarm 4127522816
Alarm 134283264
Code
Code
Trigger The unit is configured with a transformer and the sen-
Trigger LWT Reset is enabled and LWT reset input out of
sor status is other than “10” and UC01 communication
range. For this alarm out of range is considered to be
with UE01 module is OK, for at least one second
a signal less than 3mA or more than 21mA
Action Ignore transformer unload logic
Action LWT reset signal and function are ignored
Taken
Taken
Reset: Sensor status returns to “10”, or the unit is reconfig-
Reset LWT Reset Type set point is not 4-20mA or LWT reset
ured to not have a transformer
input back in range for 5 seconds

Low OAT Lockout Peripheral Module Comm Failure

Alarm Peripheral Module Comm Failure
Alarm Low OAT Lockout
Type Fault
Type Warning
Displayed Peripheral Module Comm Failure
Displayed Low OAT Lockout Text
Text
Alarm Message Module Module Payload
Alarm Message Module Module Payload Parts Code Type ID
Parts Code Type ID
188 4,6,7 0 0
65 1 0 0
Alarm Expansion Module – Sensor Box: 3154380800
Alarm 1090584576 Code
Expansion Module – Main Box: 3154575360
Code
Dual EXV Driver: 3154509824
Trigger Low OAT Lockout is active and BAS Alert setpoint is
enabled Trigger Modbus communication is lost with any of the above
modules, only if applicable to current configuration
Action Specified in Low OAT Lockout Section
Taken Action Shutdown all circuits and lock out unit from running
Taken
Reset Alarm trigger no longer exists
Reset Alarm trigger no longer exists, or the unit is reconfig-
ured to not the affected module
Transformer Overtemperature Fault
Alarm Transformer Overtemperature Fault
Type Fault
Displayed Transformer Overtemperature Fault
Text
Alarm Message Module Module Payload
Parts Code Type ID
247 1 0 0
Alarm 4144037888
Code
Trigger The unit is configured with a transformer and the
transformer over-temperature input is off
Action Shutdown all circuits and lock out unit from running
Taken
Reset Alarm trigger no longer exists, or the unit is reconfig-
ured to not have a transformer

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Unit Controller Operation

Circuit Alarms Alarm Mechanical Low Pressure Switch

Action Shutdown circuit and lock circuit out from running
PVM/FFP Fault Taken

Alarm PVM/FFP Fault Reset Alarm trigger no longer exists – Cannot be auto
cleared
Type Fault
Displayed PVM/FFP Fault Low Evaporator Pressure
Text
Alarm Message Module Module Payload Alarm Low Evaporator Pressure
Parts Code Type ID Type Fault
228 8 1,2 1,2 Displayed Low Evaporator Pressure
Alarm Circuit 1 GFM: 3825730561 Text
Code Alarm Message Module Module Payload
Circuit 2 GFM: 3825731585
Parts Code Type ID
Circuit 1 PVM: 3825730562
153 8 1,2 0
Circuit 2 PVM: 3825731586
Alarm Circuit 1: 2567439360
Trigger [Power Configuration = Multi Point and PVM/GFP Code
input is off] for longer than one second Circuit 2: 2567440384

Action Shutdown circuit and lock circuit out from running Trigger This alarm should trigger when Freeze time is exceed-
Taken ed, Low Ambient Start is not active, and Circuit State
= Run. It should also trigger if [Evaporator Pressure
Reset PVM/GFP input is on for at least 5 seconds or if Power < Low Evaporator Pressure Fault setpoint and Circuit
Configuration = Single Point State = Run] for longer than one second.
Freezestat logic allows the circuit to run for varying
Mechanical High Pressure Switch times at low pressures. The lower the pressure, the
shorter the time the compressor can run. This time is
Alarm Mechanical High Pressure Switch calculated as follows:
Type Fault Freeze error = Low Evaporator Pressure Unload –
Evaporator Pressure
Displayed Mechanical High Pressure Switch
Text Freeze time =
Alarm Message Module Module Payload • For units equipped with shell and tube type
Parts Code Type ID evaporator: 80 – (freeze error/6.895), limited to a
range of 40 to 80 seconds
166 8 1,2 0
• For units with plate frame type evaporator: 60 –
Alarm Circuit 1: 2785543168 (freeze error/6.895), limited to a range of 20 to 60
Code seconds
Circuit 2: 2785544192
Trigger Mechanical High Pressure switch input is off for longer When the evaporator pressure goes below the Low
than one second Evaporator Pressure Unload set point, a timer starts.
If this timer exceeds the freeze time, then a freezestat
Action Shutdown circuit and lock circuit out from running trip occurs. If the evaporator pressure rises to the
Taken unload set point or higher, and the freeze time has not
Reset Alarm trigger no longer exists– Cannot be auto cleared been exceeded, the timer will reset.
The alarm cannot trigger if the evaporator pressure
Mechanical Low Pressure Switch sensor fault is active.
Action Shutdown circuit and lock circuit out from running
Alarm Mechanical Low Pressure Switch Taken
Type Fault Reset Evaporator Pressure > Low Evaporator Pressure Fault
Displayed Mechanical Low Pressure Switch setpoint
Text
Alarm Message Module Module Payload
Parts Code Type ID
186 8 1,2 0
Alarm Circuit 1: 3121087488
Code
Circuit 2: 3121088512
Trigger Mechanical Low Pressure switch input is off for longer
than 40 seconds and the circuit state is run. This alarm
requires Evaporator configuration = Remote Evap to
trigger

DAIKIN APPLIED 72 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

High Condenser Pressure Low OAT Restart Fault

Alarm High Condenser Pressure Alarm Low OAT Restart Fault
Type Fault Type Fault
Displayed High Condenser Pressure Displayed Low OAT Restart Fault
Text Text
Alarm Message Module Module Payload Alarm Message Module Module Payload
Parts Code Type ID Parts Code Type ID
145 8 1,2 0 161 8 1,2 0
Alarm Circuit 1: 2433221632 Alarm Circuit 1: 2701657088
Code Code
Circuit 2: 2433222656 Circuit 2: 2701658112
Trigger Condenser Pressure > High Condenser Pressure Trigger Circuit has failed three low OAT start attempts
Fault setpoint for longer than one second
Action Shutdown circuit and lock circuit out from running
Action Shutdown circuit and lock circuit out from running Taken
Taken
Reset This alarm can be cleared manually via the controller
Reset If the Condenser Pressure < High Condenser Pres- HMI or via BAS command, or auto cleared as outlined
sure Fault setpoint in the section below

High Discharge Temperature No Pressure Change After Startup

Alarm High Discharge Temperature Alarm No Pressure Change After Start
Type Fault Type Fault
Displayed High Discharge Temperature Displayed No Pressure Change After Start
Text Text
Alarm Message Module Module Payload Alarm Message Module Module Payload
Parts Code Type ID Parts Code Type ID
148 8 1,2 0 189 8 1,2 0
Alarm Circuit 1: 2483553280 Alarm Circuit 1: 3171419136
Code Code
Circuit 2: 2483554304 Circuit 2: 3171420160
Trigger Discharge Temperature > High Discharge Temperature Trigger After start of compressor, at least a 7 KPA (1 PSI) drop
Fault setpoint for longer than one second in evaporator pressure OR 35 KPA (5.1 PSI) increase
in condenser pressure has not occurred after 30
Action Shutdown circuit and lock circuit out from running
seconds
Taken
Action Shutdown circuit and lock circuit out from running
Reset If the Discharge Temperature < High Discharge Tem-
Taken
perature Fault setpoint
Reset This alarm can be cleared manually via the controller
HMI or via BAS command, or auto cleared as outlined
Motor Protection Fault in the section below
Alarm Motor Protection Fault
Low Suction SH Fault
Type Fault
Displayed Motor Protection Fault Alarm Low Suction SH Fault
Text
Type Fault
Alarm Message Module Module Payload
Displayed Low Suction SH Fault
Parts Code Type ID
Text
133 8 1,2 0
Alarm Message Module Module Payload
Alarm Circuit 1: 2231895040 Parts Code Type ID
Code
Circuit 2: 2231896064 219 8 1,2 0
Trigger [Motor Protection input is off and power up start delay Alarm Circuit 1: 3674735616
is not active] for longer than one second Code
Circuit 2: 3674736640
Action Shutdown circuit and lock circuit out from running
Trigger SSH < 3F for 5 minutes consecutive.
Taken
Action Shutdown circuit and lock circuit out from running for
Reset Motor Protection input is on
Taken 30 minutes
Reset This alarm can be cleared manually via the controller
HMI or via BAS command, or auto cleared as outlined
in the section below once the 30-minute timer has
expired

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Unit Controller Operation

Low Condenser Sat. Temperature Condenser Pressure Sensor Fault

Alarm Low Condenser Sat. Temperature Alarm Condenser Pressure Sensor Fault
Type Fault Type Fault
Displayed Low Condenser Sat. Temperature Displayed Condenser Pressure Sensor Fault
Text Text
Alarm Message Module Module Payload Alarm Message Module Module Payload
Parts Code Type ID Parts Code Type ID
155 8 1,2 0 142 5 1,2 0
Alarm Circuit 1: 3691512832 Alarm Circuit 1: 2382693376
Code Code
Circuit 2: 3691513856 Circuit 2: 2382694400
Trigger Condenser Sat. Temperature is less than the limit for 5 Trigger Trigger any time sensor status is other than “10” and
consecutive minutes, where the limit is defined as: UC01 communication with UE01 module is OK, for at
least one second
Evaporator Sat. Evaporator Sat.
Temperature <= 30°F Temperature > 30°F Action Shutdown circuit and lock circuit out from running
Taken
Limit = 50°F Limit = (1.2 * Evaporator
Sat. Temperature) + 11.6 Reset Sensor status returns to “10”
(all in °F)
Action Shutdown circuit and lock circuit out from running for Discharge Temperature Sensor Fault
Taken 60 minutes.
Alarm Discharge Temperature Sensor Fault
Reset This alarm can be cleared manually via the controller
HMI or via BAS command, or auto cleared as outlined Type Fault
in the section below once the 60-minute timer has
expired Displayed Discharge Temperature Sensor Fault
Text

Evaporator Pressure Sensor Fault Alarm Message Module Module Payload

Parts Code Type ID
Alarm Evaporator Pressure Sensor Fault 147 5 1,2 0
Type Fault Alarm Circuit 1: 2466579456
Code
Displayed Evaporator Pressure Sensor Fault Circuit 2: 2466580480
Text
Trigger Trigger any time sensor status is other than “10” and
Alarm Message Module Module Payload UC01 communication with UE01 module is OK, for at
Parts Code Type ID least one second.
155 5 1,2 0 Action Shutdown circuit and lock circuit out from running
Taken
Alarm Circuit 1: 2600797184
Code Reset Sensor status returns to “10”
Circuit 2: 2600798208
Trigger Trigger any time sensor status is other than “10” and
UC01 communication with UE01 module is OK, for at
Suction Temperature Sensor Fault
least one second
Alarm Suction Temperature Sensor Fault
Action Shutdown circuit and lock circuit out from running
Taken Type Fault

Reset Sensor status returns to “10” Displayed Suction Temperature Sensor Fault
Text
Alarm Message Module Module Payload
Parts Code Type ID
183 5 1,2 0
Alarm Circuit 1: 3070559232
Code
Circuit 2: 3070560256
Trigger Trigger any time sensor status is other than “10” and
UC01 communication with UE01 module is OK, for at
least one second
Action Shutdown circuit and lock circuit out from running
Taken
Reset Sensor status returns to “10”

DAIKIN APPLIED 74 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Controller Operation

Evaporator EXV Module Communication Faults Events

Alarm Evaporator EXV Module Communications Fault The following table lists all the events. For further details about
each event, see the following sections.
Type Fault
Displayed Evap EXV Module Communications Fault
Text Table 85: Events
Alarm Message Module Module Payload Event Text for Selection Level Action
Parts Code Type ID Set Point
32 6 1,2 0 Low Evaporator Low Pressure Hold Circuit Inhibit
Alarm Circuit 1: 537265152 Pressure Hold capacity
Code increase
Circuit 2: 537266176
Low Evaporator Low Pressure Circuit Reduce
Trigger Trigger any time EXV connection status is false and Pressure Unload Unload capacity
UC01 communication with Dual EXV Driver module is
OK, for at least one second. High Condenser High Pressure Circuit Reduce
Pressure Unload Unload capacity
Action Shutdown circuit and lock circuit out from running
Taken
Event Detail Explanation
Reset Sensor status returns to good
Event Description of the event
DC Fan Fault Displayed Text to be displayed in the event log
Text
Alarm DC Fan Fault
Trigger Conditions required to trigger the event
Type Problem
Action Taken Action that should be taken when the event triggers
Displayed DC Fan Fault and while active
Text
Reset Conditions for the event to reset
Alarm Message Module Module Payload
Parts Code Type ID
33 3 See Mod- See Module
Circuit Events
ule Type Type Table The events in this section exist for both circuit one and circuit
Table Above two.
Above
Alarm Generated on a case-by-case basis Low Evaporator Pressure - Hold
Code
Trigger Triggered when a DC fan reports an alarm Alarm Low Evaporator Pressure - Hold
Action Ignore affected fan in condenser staging logic Displayed Cn Low Evap Pr Hold
Taken Text
Reset DC fan reports alarm is cleared Trigger This event is triggered if all of the following are true:
• circuit state = Run
Auto Clearing Alarms • evaporator pressure <= Low Evaporator
Alarm auto-clearing only occurs if there are no alarms present Pressure - Hold set point
that cannot be auto cleared. Alarms that cannot be auto cleared • circuit is not currently in a low OAT start
are noted in the alarm descriptions above. • it has been at least 30 seconds since a
The auto clearing process is equivalent to if the user manually compressor has started on the circuit.
cleared the alarms from the HMI or sent the clear alarms Action Inhibit starting of additional compressors on the circuit
command via the BAS system. Taken

A successful auto-clear means all alarms have been cleared. Reset While still running, the event will be reset if evaporator
pressure > Low Evaporator Pressure Hold SP + 90
The first successful auto-clear starts an hour-long timer, while KPA(13 PSI). The event is also reset if the circuit is no
the timer is active, no more than 3 successful auto-clears can longer in the run state.
occur. After the third successful auto-clear, there will be no more
attempts until the timer expires.

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Unit Controller Operation

Low Evaporator Pressure - Unload

Alarm Low Evaporator Pressure - Unload
Displayed Cn Low Evap Pr Unld
Text
Trigger This event is triggered if all of the following are true:
• circuit state = Run
• more than one compressor is running on the
circuit
• evaporator pressure <= Low Evaporator
Pressure - Unload set point for a time
greater than half of the current freezestat
time
• circuit is not currently in a low OAT start
• it has been at least 30 seconds since a
compressor has started on the circuit
Action Stage off one compressor on the circuit every 10 sec-
Taken onds while evaporator pressure is less than the unload
set point, except the last one.
Reset While still running, the event will be reset if evaporator
pressure > Low Evaporator Pressure Hold SP + 90
KPA(13 PSI). The event is also reset if the circuit is no
longer in the run state.

High Condenser Pressure - Unload

Alarm High Condenser Pressure – Unload
Displayed Cn High Cond Pr Unld
Text
Trigger This event is triggered if all of the following are true:
• circuit state = Run
• more than one compressor is running on the
circuit
• condenser pressure > High Condenser
Pressure – Unload set point
Action Stage off one compressor on the circuit every 10
Taken seconds while condenser pressure is higher than the
unload set point, except the last one. Inhibit staging
more compressors on until the condition resets.
Reset While still running, the event will be reset if condenser
pressure <= High Condenser Pressure Unload SP –
862 KPA(125 PSI). The event is also reset if the circuit
is no longer in the run state.

DAIKIN APPLIED 76 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Touchscreen Controller

Touchscreen Controller Entering an invalid password has the same effect as not entering
a password.
Once a valid password has been entered, the controller allows
Home Screen further changes and access without requiring the user to enter
a password until either the password timer expires or a different
password is entered. The default value for this password timer is
Figure 42: Home Screen
10 minutes.

Navigation Menu
Figure 44: Navigation Menu

When power is applied to the control circuit, the controller screen

will be active. Tap the touchscreen to display the Home screen.
From the home screen you can see the status of the unit as well
as key temperature readings.
Press the Home Screen icon at the top of the screen to return to
Tap the Navigation Menu icon in the upper left corner of the
this page at any time.
display screen to access the Navigation Menu.

Login Screen From the Navigation Menu you can select the following options:
• Unit
Figure 43: Login Screen • Circuit 1
• Circuit 2
• Trends
• Configuration
• Maintenance
To close the Navigation Menu, tap the “X” in the upper right
corner of the display screen.

There are 4 levels of access for the user interface:

• No password
• Operator level - 5321
• Technician/Manager level - 2526
• Daikin Applied service technician level

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Touchscreen Controller

Unit/Setpoints Configuration
The Unit Home screen displays important information about the
unit, including the active setpoint, entering water temperature, Figure 47: Configuration Screen
startup temperature, and more.

Figure 45: Unit Home Screen

Use the Configuration screen to properly setup and configure the

unit. From the Configuration screen you can perform the following
actions:
From the Unit screen you can view and modify the following
settings: • Commission Unit
• Setpoints • Fan Addressing
• Evaporator Pumps • Update Software
• Freeze Protection • Configure BAS
• Power Conservation • Setup SiteLine

Circuit 1/Circuit 2 Maintenance

From the Circuit 1 and Circuit 2 screens you can view key
information for each circuit and access the following settings: Figure 48: Maintenance Screen

• Setpoints
• Compressors
• Condenser Fans

Figure 46: Circuit Screen

Navigate to the Maintenance screen to view maintenance

information about the unit, such as model number, last
maintenance date, next scheduled maintenance date, and to
access test mode.

DAIKIN APPLIED 78 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Startup/Shutdown Procedures

Startup/Shutdown Procedures Startup Electrical Check Out

DANGER
Pre-Startup LOCKOUT/TAGOUT all power sources prior to service,
pressurizing, de-pressuring, or powering down the unit. Failure
Inspect the chiller to ensure no components became loose or to follow this warning exactly can result in serious injury or death.
damaged during shipping or installation including leak test and Disconnect electrical power before servicing the equipment.
wiring check. Complete the pre-start checklist on page 101 and More than one disconnect may be required to denergize the
return to Daikin Applied prior to startup date. unit. Be sure to read and understand the installation, operation,
and service instructions within this manual.
CAUTION
Repeated manual clearing of alarms without resolving the
WARNING
cause of the alarm may damage the chiller, impact the unit’s
operational performance, and may affect the chiller’s warranty. Electrical power must be applied to the compressor crankcase
heaters 24 hours before starting unit to eliminate refrigerant
from the oil.
CAUTION
Dyes used for refrigerant leak detection are not tested or 1. Open all electrical disconnects and check all power wiring
recommended for use in Daikin Applied chillers. Use of these connections. Start at the power block and systematically
products may damage and/or degrade the performance of the check all connections through all components to and
equipment and will void the manufacturer warranty. including the compressor terminals. These should be
checked again after 3 months of operation and at least
yearly thereafter.
Startup Checkout
2. Check all control wiring by pulling on the wire at
1. Verify chilled water piping requirements from page 49 are
connections and tighten all screw connections. Check plug-
met.
in relays for proper seating and to insure retaining clips are
2. Check the pump operation and vent all air from the system. installed.
3. Circulate evaporator water, checking for proper system 3. Apply power to the unit. The panel Alarm Light will stay on
pressure and evaporator pressure drop. Compare the until S1 is closed. Ignore the Alarm Light for the check out
pressure drop to the evaporator water pressure drop curve. period. If you have the optional Alarm Bell, you may wish to
4. Flush System and clean all water strainers before placing disconnect it.
the chiller into service. 4. Check at the power block or disconnect for the proper
5. Check water treatment and proper glycol percentage by voltage between phases. Check power for proper phasing
volume, if used. using a phase sequence meter before starting unit.

6. Check all exposed brazed joints for evidence of leaks. 5. Check for 120 Vac at the control transformer and at TB-2
Joints may have been damaged during shipping or when terminal #1 and the neutral block (NB).
the unit was installed. 6. Check between TB-2 terminal #7 and NB for 120 Vac
7. Check that all refrigerant valves are either opened or supply for transformer #2.
closed as required for proper operation of the chiller. 7. Check between TB-2 terminal #2 and NB for 120 Vac
8. A thorough leak test must be done using an electronic leak control voltage. This supplies the compressor crank case
detector. Check all valve stem packing for leaks. Replace heaters.
all refrigerant valve caps and tighten. 8. Check between TB-3 terminal #17 and #27 for 24 Vac
9. Check all refrigerant lines to insure that they will not vibrate control voltage.
against each other or against other chiller components and
are properly supported.
10. Check all connections and all refrigerant threaded
connectors.
11. Look for any signs of refrigerant leaks around the
condenser coils and for damage during shipping or
installation.
12. Connect refrigerant service gauges to each refrigerant
circuit before starting unit.

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Startup/Shutdown Procedures

Startup Steps Shutdown

Refer to the MicroTech unit controller information on page 39
to become familiar with unit operation before starting the chiller. Temporary Shutdown
There should be adequate building load (at least 50 percent of 1. Use the LED Enable button on the Main control box door to
the unit full load capacity) and stable conditions to properly check disable the unit.
the operation of the chiller refrigerant circuits. 2. Turn off chilled water pump. Chilled water pump to operate
Be prepared to record all operating parameters required by while compressors are pumping down.
the “Warranty Registration Form” on page 102. Return this 3. To start the chiller after a temporary shutdown, follow the
information within 10 working days to Daikin Applied as instructed startup instructions.
on the form to obtain full warranty benefits.
• Verify chilled water flow rate. Extended Shutdown
• Calibrate thermal dispersion flow switch, see instructions on 1. Front seat both condenser liquid line service valves.
page 82
2. Use the LED Enable button on the Main control box door to
• Verify remote start / stop or time clock (if installed) has disable the unit.
requested the chiller to start.
3. Front seat both refrigerant circuit discharge valves (if
• Set the chilled water setpoint to the required temperature.
applicable).
(The system water temperature must be greater than the
total of the leaving water temperature setpoint plus one- 4. If chilled water system is not drained, maintain power to the
half the control band plus the startup delta-T before the evaporator heater to prevent freezing. Maintain heat tracing
MicroTech controller will stage on cooling.) on the chilled water lines.
• Check the controller setpoints to be sure that factory 5. Drain evaporator and water piping and flush with glycol to
defaults are appropriate. prevent freezing.
6. If electrical power to the unit is on, the compressor
Table 86: Unit Enable Button Light Legend
crankcase heaters will keep the liquid refrigerant out of the
Light Activity Unit Status Description compressor oil. This will minimize startup time when putting
the unit back into service. The evaporator heater will be
Off Not Enabled or No Power
able to function.
Slow Pulse (3 Second Period) Enable and Not Running
7. If electrical power is off, make provisions to power the
On Running evaporator heater (if chilled water system is not drained
or is filled with suitable glycol). Tag all opened electrical
On with Fast Pulse (1 Second Running with Alarm
On, 1 Second Double Pulse) disconnect switches to warn against startup before the
refrigerant valves are in the correct operating position.
Fast Pulse Not Running with Alarm
To start the chiller after an extended shutdown, follow the pre-
startup and startup instructions.
Post Startup
After the chiller has been operating for a period of time and has
become stable, check the following:
Pre-Startup (Pumps)
Follow the chiller startup procedure beginning on page 81
• Compressor oil level.
and complete the pre-start checklist for scroll compressor
• Refrigerant sight glass for flashing. chillers found in the front of this manual as well as the pump
• Rotation of condenser fans. commissioning startup form.
• Complete the “Equipment Warranty Registration Form,” Other operational guidelines are as follows:
found at the end of this manual, within 10 days of start-up
• Check the rotation of the pump using a phase rotation
in order to comply with the terms of Daikin Applied Limited
meter.
Product Warranty.
• Do not run the pump without fluid in the system. Fluid is
required to cool and lubricate the pump.
• Before starting pump(s) and with water in the pump, purge
the seal flush line by cracking the vent valve until water
appears. The valve will protrude from the pump insulation.
The seal is the highest point in the pump and requires water
for sealing and lubrication.
• VFD equipped pumps are shipped with the pump VFD
controller in the AUTO mode. Confirm this by checking the

DAIKIN APPLIED 80 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Startup/Shutdown Procedures

VFD controller and pressing the Auto key if necessary. The

AUTO ON button is located at the bottom of the controller.
Startup (Pumps)
Occasionally the impeller may be temporarily bound up and will
• Check that the “Y” strainer valve is open (horizontal
not turn at start up. If this is the case, loosen the insulation and
position) and the triple-duty valve is open.
loosen the hold-down bolts holding the motor assembly to the
In addition to making any settings required, it is often desirable pump casing (do not remove them) and bump the pump.
to run the pumps without the chiller running to check the chilled
water circuit. Energize the unit by closing the main disconnect The pump package is shipped with three strainers:
located in the right-hand panel door. Non-VFD pumps can then • A “Y” type strainer at the unit inlet connection.
be operated using the switch located on the door of the pump • A perforated strainer located in the inlet guide assembly at
control panel. Use the display keypad on VFD unit for operation. the inlet of the pump.
Press the Hand on key and use the ▲ or ▼ key to regulate the
pump speed and flow. The VFD should be changed to the Auto • A fine mesh temporary start-up strainer located in the inlet
mode for normal operation. guide.
The “Y” strainer has a finer mesh than the inlet guide strainer and
Setting the Operating Mode should catch most debris before it reaches the inlet guide strainer
which also functions as suction flow direction device.
For convenience, the operating parameters for each of the three
operating modes have pre-programmed setups. No special attention need be paid to the Suction Guide strainer at
initial start-up. It will strain the pumped fluid and stabilize the flow
Setup #1 Sensorless into the pump suction automatically.

The pump control is factory set for this mode and no field
changes or programming is required.
Removing Temporary Strainer
The temporary strainer must be removed following system clean
NOTICE up as follows:
Sensorless operation is only allowed for single chiller systems. After all debris has been removed from the system, or a
Systems with parallel chiller operation must use one of the other maximum of 24 running hours, stop the pump and close the
control methods. pump isolation valves. Drain the Suction Guide by removing the
drain plug or opening the blowdown valve, if installed. Remove
Setup #2 External Sensor the insulation disc held on with Velcro (the disc has a “CAUTION
Normally a differential pressure sensor. Remove Startup Strainer After 24 Hours” sticker). Remove the
suction guide cover and remove the strainer assembly from the
Setup #3 BAS valve body.

“BAS Integration of Pumps” on page 22. The temporary fine-mesh start-up strainer is tack-welded to the
permanent stainless steel strainer. This temporary strainer should
Hand On now be removed from the permanent strainer. The fine-mesh
strainer is designed to remove small particulate from new piping
Manual operation - not programmed. systems and could easily clog with debris if left in place. This will
Change from the sensorless default setup #1 to setup #2 or #3 be detrimental to the operation of the pump.
on the graphic keypad display as follows: Replace the permanent strainer into the fitting body once the
1. Press the OFF key. The keypad display will remain temporary strainer is removed.
powered. Inspect the cover O-ring and replace if necessary. Replace the
2. Press the MAIN MENU key. Should show parameter “0- ** cover into the body. Ensuring that the strainer is properly seated,
Operations/Display”. tighten the cover bolts diagonally, evenly and firmly.
3. Press OK. The seal may drip at initial start up as it breaks in. If the drip
continues for more than a few hours, service may be required.
4. Press ▼ key to 0-1 “Set UP Operations”.
5. Press “OK”. Display goes to 0-10 “Active Setup”
6. Press “OK”. Display will show boxed #1, #2, or #3
7. Press ▼ or ▲ key to select either mode #2 or #3. #1 is
factory default.
8. Press OK. The upper right-hand corner of the display
should show 2(2) or 3(3) depending on the choice.
9. Press AUTO for normal operation.
10. Press STATUS to return to the normal operating screen.

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Startup/Shutdown Procedures

Seasonal Shutdown (Pumps) Mounting

Follow the instructions in the chiller unit for seasonal shutdown Figure 50 highlights the position of the electrical connector and
procedures. indentation ‘mark’ on flow switch.
In addition for the pump package:
Figure 50: Flow Switch Details
No components or piping on the pump package are heat
traced. If heat tracing is field installed, carefully remove
the factory insulation, install the heat tracing and carefully
replace the insulation, being careful to seal it against moisture
penetration.
If draining the chilled water system, see diagrams beginning
on page 14 for the location of drain points in the piping and
pumps, both of which must be thoroughly drained.

Flow Switch Installation and

Calibration
A thermal dispersion flow switch uses heat to determine flow and
therefore must be calibrated during system startup. A thermal
dispersion flow switch can be an acceptable replacement for
paddle type flow switches and differential pressure switches but
care must be taken regarding wiring.
The thermal dispersion flow switch supplied by Daikin Applied, No. Descriptions
shown in Figure 49, comes as a 2 part unit consisting of a flow 1 Electrical Connector
switch and an adapter labeled E40242 by the supplier.
2 Indentation

Figure 49: Thermal Dispersion Flow Switch and Adapter It is required that the flow switch be mounted such that the
electrical connection and indentation ‘mark’ are pointed in the
direction of flow as shown in Figure 51.
If the flow sensor is to be mounted away from the unit, the sensor
should be mounted on the wall of the inlet pipe of evaporator, or
in a run of straight pipe that allows 5 to 10 pipe diameters prior
to the sensor and 3 to 5 pipe diameters of straight pipe after the
sensor. Flow switch is placed in inlet pipe to reflect flow entering
the evaporator.

Figure 51: Mount in Direction of Flow

NOTICE
Flow switch MUST be calibrated before chiller operation. Failure
to properly calibrate the switch may result in severe chiller
damage and/or void warranty.

DAIKIN APPLIED 82 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Startup/Shutdown Procedures

It is important that the flow switch be mounted so that the probe

is sufficiently inserted into the fluid stream. Figure 52 illustrates
the recommended orientation of the sensor. It may not be
mounted directly on top or directly on the bottom of a horizontal
pipe.

NOTICE
DO NOT alter or relocate factory installed flow switch. If issues exist, contact
Chiller Technical Response at TechResponse@DaikinApplied.com.

Figure 52: Remote Mounting Guidelines for Flow Switch

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Startup/Shutdown Procedures

Table 87: Flow Volume Calculation

US GPM at the velocities indicated below

Inside GPM
Pipe Default adjustment
Pipe Size Diameter per '+' or '-'
(inch) (inch) 20 cm/sec 30 cm/sec 50 cm/sec 75 cm/sec 100 cm/sec 150 cm/sec 200 cm/sec 250 cm/sec 300cm/sec key input
2 2.06 6.86 10.3 17.2 25.7 34.3 51.5 68.6 85.8 102.9 1.72

2.5 2.46 9.79 14.7 24.5 36.7 49.0 73.4 97.9 122.4 146.9 2.42

3 3.07 15.1 22.7 37.8 56.7 75.6 113.4 151.2 189.0 226.8 3.78

3.5 3.55 20.2 30.3 50.6 75.8 101.1 151.7 202.2 252.8 303.3 5.06

4 4.03 26.0 39.1 65.1 97.7 130.2 195.3 260.4 325.5 390.5 6.51

5 5.05 40.9 61.4 102.3 153.5 204.6 306.9 409.2 511.5 613.7 10.2

6 6.07 59.1 88.6 147.7 221.6 295.5 443.2 590.9 738.7 886.3 14.8

8 7.98 102.3 153.5 255.8 383.7 511.6 767.5 1023.3 1279.1 1534.7 25.6

10 10.02 161.3 241.9 403.2 604.8 806.5 1209.7 1612.9 2016.2 2419.1 39.0

12 11.94 229.0 343.4 572.4 858.6 1144.7 1717.1 2289.5 2861.9 3433.8 57.2

14 13.13 276.8 415.2 692.0 1037.9 1383.9 2075.9 2767.8 3459.8 4151.3 69.2

16 15.00 361.5 542.2 903.6 1355.5 1807.3 2710.9 3614.6 4518.2 5421.2 90.4

18 16.88 457.5 686.3 1143.8 1715.7 2287.6 3431.4 4575.2 5719.0 6862.1 114.4

20 18.81 572.4 853.0 1421.6 2132.4 2843.2 4264.8 5686.4 7108.0 8528.6 142.2

Flow Switch Adapter Step 1: Adjust flow through the evaporator to the minimum
If needed, the adapter is threaded into the pipe wall using desired operating gpm. Maintain this flow throughout the setup
pipe sealant appropriate for the application. The flow sensor is procedure.
mounted onto the adapter using silicone grease. Carefully apply Step 2: Once steady state minimum desired operating flow is
lubricant to the inside threads and o-ring so temperature probe obtained, perform the ‘Teach’ function on the flow switch. The
does not become coated with lubricant or pipe thread sealant. ‘Teach’ function is initiated by holding down the minus ‘-’ button
Torque the adapter/sensor connection to 18.5 ft/lbs. on the face of the flow switch for 15 seconds. During this 15
second period, LEDs ‘0’ and ‘9’ will be lit green. Once the ‘Teach’
Wiring function is completed, the outer LEDs will flash green as shown
Refer to wiring diagram in the unit control panel. in Figure 53.

Either AC or DC is used to power the flow switch. The unit

Figure 53: Automatic Teach of Setpoint
controller’s digital input is a DC signal which is supplied through
the switch output of the flow switch for flow indication. It is
required that the AC and DC commons of power be separated.
Contact Chiller Technical Response for alternate wiring
scenarios.

Flow Switch Setup

The flow switch comes from the factory set at a default velocity
of 20cm/s. This value is typically well below the minimum water
flow specified for the unit’s evaporator and condenser so field
adjustment is required for adequate low flow protection. Table 87
shows the calculated gallons per minute (gpm) for Schedule 40
steel pipe for various fluid velocities from 15 cm/s to 60 cm/s. The
flow switch has a range of adjustment from 3 cm/s to 300 cm/s.

DAIKIN APPLIED 84 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Startup/Shutdown Procedures

Step 3: After the ‘Teach’ function is completed and the outer Figure 55: Upper Range of Minimum Flow
LEDs flashed, the flow switch will indicate a new set point based
upon the current flow which should still be at the steady state
minimum desired operating flow. Figure 54 shows a typical
display for this condition. All LEDs to the left of the SP LED are
lit green. The SP LED is lit RED (or may toggle amber) which
indicates that the flow switch is OPEN. Typically, an increase in
fluid flow is between 15% to 30% above the ‘Teach’ function flow
is required for the SP LED to turn AMBER and the flow switch to
CLOSE indicating acceptable flow.

Figure 54: Teach Adjustment Complete

Step 5: Once the SP is set, it is recommended that the sensor be

locked to avoid inadvertent readjustment. This can be performed
by pressing both the ‘+’ and ‘-’ buttons simultaneously for 10
seconds. The indication goes out momentarily indicating the unit
is locked. To unlock, the same procedure is performed to toggle
to unlocked.
NOTE: 1. The LED window display on flow switch represents
a velocity range of 50 cm/s. The window centers on
the set point (SP). For example, if the SP was set to
200 cm/s, then the LED labeled ‘0’ would represent
a velocity of 180 cm/s when lit and the LED labeled 9
In Step 3, the ‘Teach’ function re-adjusted the flow switch set would represent a velocity of 230 cm/s when lit.
point (SP) while flow was at the minimum desired operating flow. 2. Each LED represents 5 cm/s, or two presses of the
The chiller will not operate at this flow because the flow switch ‘+’ or ‘-’ buttons.
is OPEN after performing the ‘Teach’ function. The benefit of the 3. When power is initially applied to the flow switch, all
‘Teach’ function is to quickly set the set point within the desired green LEDs light and go out step by step. During this
operating range. Additional ‘manual’ adjustment of set point is time, the output is closed. The unit is in the operating
required in order to allow for chiller operation at this minimum mode.
flow. The ‘+’ and ‘-’ buttons on the face of the flow switch allow for 4. When making manual adjustments to the set point
the manual adjustment of the SP. Pressing the ‘+’ button reduces (SP), if no button is pressed for 2 seconds, the unit
the flow set point while pressing the ‘-’ button increases the flow returns to the operating mode with the newly set value.
set point. Each button press, ‘+’ or ‘-‘, changes the flow set point
Flow below display range: The SP LED will be lit red and the
by 2.5 cm/s.
leftmost LED will be flashing green. For example, if the SP was
Step 4: Press the ‘+’ button until LED ‘9’ begins to flash, as set to 200 cm/s, the flashing labeled ‘0’ would indicate that the
shown in Figure 55. Opening of flow switch should now occur at flow was below 180 cm/s. This would be shown if no flow through
approximately 80% to 90% of minimum flow. chiller or lowered than desired flow.

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Startup/Shutdown Procedures

Figure 56: Display for Flow Below Range

Flow above display range: The SP LED will be lit amber, all
LEDs to the left and right of the SP LED with be green with the
rightmost LED flashing green. For example, if the SP was set to
200 cm/s, the flashing LED labeled ‘9’ would indicate that the flow
was above 230 cm/s. This may be a normal display depending on
range by which flow varies through chiller.

Figure 57: Display for Flow Above Range

DAIKIN APPLIED 86 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Maintenance

Unit Maintenance CAUTION

Periodically check electrical terminals for tightness and tighten
as required. Always use a back-up wrench when tightening
General electrical terminals.
On initial start-up and periodically during operation, it will
be necessary to perform certain routine service checks.
Among these are checking the liquid line sight glasses, taking Compressor Maintenance
condensing and suction pressure readings, and checking to see The scroll compressors are fully hermetic and require standard
that the unit has normal superheat and subcooling readings. A maintenance practices:
recommended maintenance schedule is located at the end of this
section. • Check oil level monthly
• Inspect electrical connections annually
• Test oil annually
WARNING
If removal of the wire guards is required to perform service Crankcase Heaters
checks, ensure guards are properly re-installed after the The scroll compressors are equipped with externally mounted
maintenence is complete. The guards must be in place prior to band heaters located at the oil sump level. The function of the
start up. Failure to do so can result in damage to the unit or heater is to keep the temperature in the crankcase high enough
personal injury. to prevent refrigerant from migrating to the crankcase and
condensing in the oil during off-cycle.

Electrical Terminals Power must be supplied to the heaters 24 hours before starting
the compressors.
Prior to attempting any service on the control center, study the
wiring diagram furnished with the unit so that you understand the
operation of the unit. Lubrication
DANGER No routine lubrication is required on AGZ units. The fan motor
bearings are permanently lubricated and no further lubrication is
LOCKOUT/TAGOUT all power sources prior to starting,
required. Excessive fan motor bearing noise is an indication of a
pressurizing, de-pressuring, or powering down the Chiller.
potential bearing failure.
Disconnect electrical power before servicing the equipment.
Failure to follow this warning exactly can result in serious injury POE type oil is used for compressor lubrication. Further details
or death. and warnings are listed on page 93.

DANGER WARNING
The panel is always energized even if the system switch is off. POE oil must be handled carefully using proper protective
If it is necessary to de-energize the complete panel, including equipment (gloves, eye protection, etc.). The oil must not come
crankcase heaters, pull the main unit disconnect. More than one in contact with certain polymers (e.g. PVC), as it may absorb
disconnect may be required to de-energize the unit. Failure to moisture from this material. Daikin Applied recommends against
do so may result in serious injury or death. the use of PVC and CPVC piping for chilled water systems. Also,
do not use oil or refrigerant additives in the system.
WARNING
Electrical Shock Hazard. Before servicing or inspecting the
equipment, disconnect power to the unit. The internal capacitor
All-Aluminum Condenser Coils
remains charged after power is turned off. Wait at least the The condenser coils are an all-aluminum design including the
amount of time specified on the drive before touching any connections, microchannel, fins (an oven brazing process brazes
components. Failure to do can result in property damage, the fins to the microchannel flat tube), and headers (see Figure
personal injury, or death. 58), which eliminates the possibility of corrosion normally found
between dissimilar metals of standard coils.
WARNING
During the condensing process, refrigerant in the coil passes
Warranty may be affected if wiring is not in accordance with through the microchannel flat tubes, resulting in higher efficiency
specifications. A blown fuse or tripped protector may indicate heat transfer from the refrigerant to the airstream. In the unlikely
a short, ground fault, or overload. Before replacing fuse or occurrence of a coil leak, contact Daikin Applied to receive a
restarting compressor, the trouble must be found and corrected. replacement coil module.
It is important to have a qualified control panel electrician service
this panel. Unqualified tampering with the controls can cause
serious damage to equipment and void the warranty.

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Unit Maintenance

Figure 58: Microchannel Coil Cross Section Periodic Clean Water Rinse
A monthly clean water rinse is recommended for all coils
according to Table 73. Coils should be rinsed with water at a
lower pressure such as from a hose. Pressure washers are not
recommended as the higher pressure may damage the fins.
Regular water rinsing of epoxy coated coils that are applied in
coastal or industrial environments will help to remove chlorides,
dirt and debris. An elevated water temperature (not to exceed
130ºF) will reduce surface tension, increasing the ability to
remove chlorides and dirt.

Table 88: Coil Cleaning Guidelines

Coating Recommended Required Cleaning
Option Rinsing
Aluminum Monthly with low N/A
Coil Only pressure water only
Epoxy Coat- Monthly with low Quarterly with approved
ed Coil pressure water only - cleaner, Chloride Remover
max 130°F is required - max 130°F

Cleaning Microchannel Aluminum Coils Cleaning Epoxy Coated Coils

Maintenance consists primarily of the routine removal of dirt and The following cleaning procedures are recommended as part
debris from the outside surface of the fins. of the routine maintenance activities for epoxy coated coils.
When performing coil maintenance ensure that no support Documented routine cleaning of epoxy coated coils is required to
member, baffle, or foreign object has made unintended contact maintain warranty coverage.
with the coil (aluminum). If steel/aluminum contact is identified,
apply measures to separate employing rubber strips or bending Routine Quarterly Cleaning of Epoxy Coated Coil
the leading edge of support away from the coil. Surfaces
Quarterly cleaning is essential to extend the life of an epoxy
WARNING
coated coil and shall be part of the unit’s regularly scheduled
Prior to cleaning the coils, turn off and lock out the main power maintenance procedures. Failure to clean epoxy coated coils
switch to the unit and open all access panels. Failure to do can will void the warranty and may result in reduced efficiency and
result in property damage, personal injury, or death. durability in the environment.

Remove Surface Loaded Fibers For routine quarterly cleaning, first clean the coil with a coil
cleaner (see Table 74). After cleaning the coils with a cleaning
Surface loaded fibers or dirt should be removed prior to water agent, use the chloride remover to remove soluble salts and
rinse to prevent further restriction of airflow. If unable to back revitalize the unit.
wash the side of the coil opposite that of the coils entering air
side, then surface loaded fibers or dirt should be removed with Recommended Coil Cleaning Agents
a vacuum cleaner. If a vacuum cleaner is not available, a soft
non-metallic bristle brush may be used. In either case, the tool The following cleaning agents, used in accordance with the
should be applied in the direction of the fins. Coil surfaces can be manufacturer’s directions on the container for proper mixing and
easily damaged (fin edges bent over) if the tool is applied across cleaning, has been approved for use on epoxy coated coils to
the fins. remove mold, mildew, dust, soot, greasy residue, lint and other
particulates:
NOTICE
Use of a water stream, such as a hose, against a surface loaded Table 89: Epoxy Coated Coil Recommended Cleaning Agents
coil will drive the fibers and dirt into the coil. This will make Chemical Type Cleaning Agent
cleaning efforts more difficult. Surface loaded fibers must be Coil Cleaner Enviro-Coil Concentrate
completely removed prior to using low velocity clean water rinse.
Coil Cleaner GulfCoat™
Chloride Remover CHLOR*RID®

Chloride remover should be used to remove soluble salts from

epoxy coated coils, but the directions must be followed closely.
This product is intended to remove chlorides and sulfates and not
intended for use as a degreaser. Any grease or oil film should first
be removed with the approved cleaning agent.

DAIKIN APPLIED 88 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Maintenance

1. Remove Barrier - Soluble salts adhere themselves to the

substrate. For the effective use of this product, the product
Liquid Line Solenoid Valve
must be able to come in contact with the salts. These The liquid line solenoid valves that shut off refrigerant flow
salts may be beneath any soils, grease or dirt; therefore, in the event of a power failure do not normally require any
these barriers must be removed prior to application of this maintenance.
product. As in all surface preparation, the best work yields
the best results.
2. Apply chloride remove directly onto the substrate. Sufficient
High Ambient Control Panel
product must be applied uniformly across the substrate to This option consists of an exhaust fan with rain hood, two inlet
thoroughly wet out surface with no areas missed. This may screens with filters, necessary controls and wiring to allow
be accomplished by use of a pump-up sprayer. The method operation to 125°F (52°C). The components can be factory or
does not matter, as long as the entire area to be cleaned field installed as a kit.
is wetted. After the substrate has been thoroughly wetted, • It must be supplied on units operating at ambient
the salts will be soluble and is now only necessary to rinse temperatures of 105°F (40.6°C) and above.
them off.
• It is automatically included on units with ECM fan (low
3. Rinse - It is highly recommended that a hose be used as ambient option).
a pressure washer will damage the fins. The water to be • Check inlet filters periodically and clean as required. Verify
used for the rinse is recommended to be of potable quality, that the fan is operational.
though a lesser quality of water may be used if a small
amount of chloride remover is added. Liquid Line Sight Glass and Subcooling
Harsh Chemical and Acid Cleaners WARNING
Harsh chemicals, household bleach or acid cleaners should not This unit contains R-32, a class A2L
be used to clean outdoor epoxy coated coils. These cleaners refrigerant that is flammable. This unit
can be very difficult to rinse out of the coil and can accelerate should only be installed, serviced,
corrosion and attack the epoxy coating. If there is dirt below repaired, and disposed of by qualified
the surface of the coil, use the recommended coil cleaners as personnel licensed or certified in their
described above. jurisdiction to work with R-32 refrigerant.
Installation and maintenance must be
High Velocity Water or Compressed Air done in accordance with this manual.
High velocity water or compressed air may damage the coil fins Improper handling of this equipment can
and must only be used at a pressure lower than 100 psig and cause equipment damage or personal
130°F to prevent fin and/or coil damage. Nozzles must have a injury.
diffuse pattern, as a concentrated jet may damage the fins. Never The refrigerant sight glasses should be observed periodically. A
use a pressure washer for coil cleaning. The force of the water clear glass of liquid indicates that there is subcooled refrigerant
or air jet may bend the fin edges and increase airside pressure charge in the system. Bubbling refrigerant in the sight glass,
drop. Reduced unit performance or nuisance unit shutdowns may during stable run conditions, may indicate that the system can
occur. be short of refrigerant charge. However, it is not unusual to
see bubbles in the sight glass during changing load conditions.
Refrigerant gas flashing in the sight glass could also indicate
Evaporator an excessive pressure drop in the liquid line, possibly due to a
On AGZ-F models, the evaporator is a compact, high efficiency, clogged filter-drier or a restriction elsewhere in the liquid line.
dual circuit, brazed plate-to-plate type heat exchanger consisting If the unit is at steady full load operation and bubbles are visible
of parallel stainless steel plates. The evaporator is protected with in the sight glass, then check liquid subcooling. If subcooling is
an electric resistance heater and insulated with 3/4” (19mm) thick low, add charge to clear the sight glass. Once the subcooler is
closed-cell polyurethane insulation. This combination provides filled, extra charge will not lower the liquid temperature and does
freeze protection down to -20°F (-29°C) ambient air temperature. not help system capacity or efficiency. If subcooling is normal (15
Evaporators are designed and constructed according to, and to 20 degrees F at full load) and flashing is visible in the sight
listed by, Underwriters Laboratories (UL). Other than cleaning glass, check the pressure drop across the filter-drier.
and testing, no service work should be required on the
An element inside the sight glass indicates the moisture condition
evaporator.
corresponding to a given element color. Immediately after the
system has been opened for service, the element may indicate a
wet condition. If the sight glass does not indicate a dry condition
after about 12 hours of operation, the circuit should be pumped
down and the filter-drier changed or verify moisture content by
performing an acid test on compressor oil.

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Unit Maintenance

Expansion Valve NOTICE

The expansion valve’s function is to keep the evaporator It may be necessary to wire the HGBP solenoid in parallel with
supplied with the proper amount of refrigerant to satisfy the load the Liquid Line Solenoid on variable flow systems.
conditions. Before adjusting superheat, check that unit charge is
correct and liquid line sight glass is full with no bubbles and that WARNING
the circuit is operating under stable, full load conditions.
When performing valve checkout procedure, the hot gas line
Electronic Expansion Valve - For suction superheat targets, may become hot enough in a short period of time to cause
see “Circuit Level Set Points” on page 43. personal injury. Be sure to read and understand the installation,
operation, and service instructions within this manual.
Filter-Driers A field installed HGBP kit can be added to units already installed.
Replace the filter-drier any time excessive pressure drop is read If a 120-V version of the kit is ordered, the solenoid valve comes
across the filter-drier and/or when bubbles occur in the sight with a DIN connector and has to be wired.
glass with normal subcooling. The filter-drier should also be
The wiring should be two 14 AWG wires, one red and one white
changed if the moisture indicating liquid line sight glass indicates
to be run in conduit. Field to wire:
excess moisture in the system.
• Circuit 1 Red to NO2 on UE01 and white to SPL1 (splice
Any residual particles from the condenser tubing, compressor
connector)
and miscellaneous components are swept by the refrigerant into
the liquid line and are caught by the filter-drier. • Circuit 2 Red to NO4 on UE01 and white to SPL1 (splice
connector)
A condenser liquid line service valve is provided for isolating the
DIN connection size is 1/2 in. NPTF for conduit fitting. Required
charge in the condenser, but also serves as the point from which
wire, conduit fittings, and conduit to be supplied by the field.
the liquid line can be pumped out. With the line free of refrigerant,
the filter-drier core(s) can be easily replaced.
AGZ-F units come equipped with replaceable core filter driers. Transformer Filter
The core assembly of the replaceable core drier consists of a
filter core held tightly in the shell in a manner that allows full flow Check transformer filter periodically and clean as required (non-
without bypass. 460V unit only). Verify that the fan is operational.

DANGER
Hot Gas Bypass (Optional) LOCKOUT/TAGOUT all power sources prior to starting,
pressurizing, de-pressuring, or powering down the Chiller.
The hot gas bypass (HGBP) option allows the system to operate Disconnect electrical power before servicing the equipment.
at lower loads without excessive on/off compressor cycling. Failure to follow this warning exactly can result in serious injury
HGBP is required to be on both refrigerant circuits because of or death.
the lead / lag feature of the controller. HGBP allows passage of
discharge gas into the evaporator inlet (between the electronic
NOTICE
expansion valve and the evaporator) which generates a false
load to supplement the actual chilled water or air handler load. The transformer filter should be inspected and cleaned regularly.
Failure to do so can result in loss of performance.
NOTICE
The hot gas bypass valve should not generate a 100% false Figure 59: Transformer Filter Cleaning
load. For glycol applications, HGBP may not have full range of
setting or turn down.
The pressure regulating valve is factory set to begin opening
at 120 psig with R-32 and can be changed by adjusting the
pressure setting. To raise the pressure setting, remove the cap
and turn the adjustment screw clockwise. To lower the setting,
turn the screw counterclockwise. Do not force the adjustment
beyond the range it is designed for as this will damage the
adjustment assembly. The regulating valve opening point can be
determined by slowly reducing the system load while observing
the suction pressure. When the bypass valve starts to open, the
refrigerant line on the evaporator side of the valve will begin to
feel warm to the touch.
A solenoid valve is located ahead of the bypass valve and is
controlled by the MicroTech controller. It is active when only the
first stage of cooling on a circuit is active.

DAIKIN APPLIED 90 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Maintenance

To clean the transformer filter, do the following:

1. Remove the screws securing the transformer cover to the
unit and detach the transformer cover.
2. Remove the transformer filter.
3. Vacuum the transformer filter and clean with water.

CAUTION
High velocity water or compressed air may damage the filter and
must only be used at a pressure lower than 100 psig.
4. Reinstall transformer filter and transformer cover before
starting up unit.

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Unit Maintenance

Figure 60: Refrigerant Schematic

DAIKIN APPLIED 92 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Unit Maintenance

Table 90: Planned Maintenance Schedule POE Lubricants

Polyolester (POE) oil is used for compressor lubrication. This
type of oil is extremely hydroscopic which means it will quickly

Quarterly
Monthly
(Note 1)

(Note 2)
Weekly

Annual
Operation absorb moisture if exposed to air and may form acids that can be
harmful to the chiller. Avoid prolonged exposure of POE oil to the
atmosphere to prevent this problem.
General
It is important that only the manufacturer’s recommended oils be
Complete unit log and review (Note 3) X
used. Acceptable POE oil types are:
Visually inspect unit for loose or
X
damaged components • Danfoss POE lubricant 1855L
Inspect thermal insulation for integrity X
Clean and paint as required X
WARNING
Electrical POE oil must be handled carefully using proper protective
Check terminals for tightness, equipment (gloves, eye protection, etc.) The oil must not come
X in contact with certain polymers (e.g. PVC), as it may absorb
tighten as necessary
Clean control panel interior X moisture from this material. Daikin Applied recommends against
Visually inspect components for the use of PVC and CPVC piping for chilled water systems. Also,
X
signs of overheating do not use oil or refrigerant additives in the system.
Verify compressor heater operation X
Test and calibrate equipment
X WARNING
protection and operating controls
Polyolester Oil, commonly known as POE oil is a synthetic oil
Verify solenoid plug(s) tightness and
gasket integrity
X used in many refrigeration systems, and is present in this Daikin
Applied product. POE oil, if ever in contact with PVC/CPVC, will
Refrigeration
coat the inside wall of PVC/CPVC pipe causing environmental
Leak test X
stress fractures. Although there is no PVC/CPVC piping in this
Check sight glasses for clear flow X
product, please keep this in mind when selecting piping materials
Check filter-drier pressure drop X for your application, as system failure and property damage
Perform compressor vibration test X could result. Refer to the pipe manufacturer’s recommendations
Acid test oil sample X to determine suitable applications of the pipe.
Condenser (air-cooled)
Rinse condenser coils (Note 5) X Procedure Notes
Clean epoxy coated condenser coils
X • Use only new sealed metal containers of oil to insure
(Note 5)
Check fan blades for tightness on quality.
X
shaft (Note 6) • Buy smaller containers to prevent waste and contamination.
Check fans for loose rivets and cracks X • Use only filter driers designed for POE and check pressure
Check coil fins for damage X drops frequently.
Inspect and clean transformer filter
X • Test for acid and color at least annually. Change filter driers
(non-460V units only)
if acid or high moisture (> 200 ppm) is indicated (< 100 ppm
Notes: typical).
1. Monthly operations include all weekly operations. • Evacuate to 500 microns and hold test to insure systems
2. Annual (or spring start-up) operations includes all weekly are dry.
and monthly operations.
Control and Alarm Settings
3. Log readings can be taken daily for a higher level of unit
observation. The software that controls the operation of the unit is factory-set
for operation with R-32.
4. Never Megohm motors while they are in a vacuum to avoid
damage to the motor.
5. Coil rinsing and cleaning can be required more frequently
in areas with a high level of airborne particles.
6. When cleaning condenser coils, be sure fan motors are
electrically locked out.

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Unit Maintenance

Refrigerant Charging If subcooling is low, add charge to clear the sight glass. Once
the subcooler is filled, extra charge will not lower the liquid
temperature and does not help system capacity or efficiency.
CAUTION
If subcooling is normal (15 to 20° F at full load) and flashing is
When moving refrigerant to/from the chiller using an auxiliary
visible in the sight glass, check the pressure drop across the
tank, a grounding strap must be used. An electrical charge
filter-drier.
builds when halo-carbon refrigerant travels in a rubber hose. A
grounding strap must be used between the auxiliary refrigerant Overcharging of refrigerant will raise the compressor discharge
tank and the end sheet of the chiller (earth ground), which will pressure due to filling of the condenser tubes with excess
safely take the charge to the ground. Damage to sensitive refrigerant.
electronic components could occur if this procedure is not
followed. Service
If a unit is low on refrigerant, you must first determine the cause Special tools will be required due to higher refrigerant pressures
before attempting to recharge the unit. Locate and repair any with R-32. Oil-less/hp recovery units, hp recovery cylinders (DOT
refrigerant leaks. Soap works well to show bubbles at medium approved w/525# relief), gauge manifold 30”-250 psi low/0-800
size leaks but electronic leak detectors are needed to locate psi high, hoses w/800 psi working & 4,000 psi burst.
small leaks.
All filter driers and replacement components must be rated for
Charging or check valves should always be used on charging POE oils and for the refrigerant pressure
hoses to limit refrigerant loss and prevent frostbite. Ball valve
Brazed connections only. No StayBrite or solder connections
type recommended. Charge to 80-85% of normal charge before
(solder should never be used with any refrigerant). K or L type
starting the compressors.
refrigeration tubing only. Use nitrogen purge. Higher R-32
pressures and smaller molecule size make workmanship more
Charging procedure critical.
The units are factory-charged with R-32. Use the following Cooling the recovery cylinder will speed recovery and lessen
procedure if recharging in the field is necessary. stress on recovery equipment.
The charge can be added at any load condition between 25 to
100 percent load per circuit, but at least two fans per refrigerant
circuit should be operating if possible.
Evaporator waterflow MUST be established while charging the
unit.
• Start the system and observe operation.
• Trim the charge to the recommended liquid line sub-cooling
(approximately 15-20°F typical at full load).
• Use standard charging procedures (liquid only) to top off the
charge.
• Check the sight glass to be sure there is no refrigerant
flashing.
With outdoor temperatures above 60°F (15.6°C), all condenser
fans should be operating and the liquid line temperature should
be within 15°F to 20°F (8.3°C to 11.1°C) of the outdoor air
temperature. At 25-50% load, the liquid line temperature should
be within 5°F (2.8°C) of outdoor air temperature with all fans on.
At 75-100% load the liquid line temperature should be within
10°F (5.6°C) of outdoor air temperature with all fans on.
If the unit is at steady full load operation and bubbles are visible
in the sight glass, then check liquid subcooling. The AGZ units
have a condenser coil design with approximately 15% of the coil
tubes located in a subcooler section of the coil to achieve liquid
cooling to within 15 to 20°F (8.3 to11.1°C) of the outdoor air
temperature when all condenser fans are operating. Subcooling
should be checked at full load with 70°F (21.1°C) ambient
temperature or higher, stable conditions, and all fans running.
Liquid line subcooling at the liquid shut-off valve should be
between 15 and 20°F at full load.

DAIKIN APPLIED 94 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Refrigerant Guidelines

Refrigerant Guidelines Information of procedures additional to usual information for

refrigerating equipment installation, repair, maintenance and
decommission procedures is required when equipment with
WARNING
flammable refrigerants is affected.
This unit contains R-32, a class A2L refrigerant
that is flammable. This unit should only be The training of these procedures is carried out by national
installed, serviced, repaired, and disposed of training organizations or manufacturers that are accredited to
by qualified personnel licensed or certified in teach the relevant national competency standards that may
their jurisdiction to work with R-32 refrigerant. be set in legislation. The achieved competence should be
Installation and maintenance must be done in documented by a certificate.
accordance with this manual. Improper handling Maintaining and servicing R-32 refrigerant should only be
of this equipment can cause equipment damage performed as recommended by this manual and by personnel
or personal injury. licensed or certified in their jurisdiction to handle A2L refrigerants.
For installation only in locations not accessible to the general public. Dismantling the unit and treatment of the refrigerant, oil, and
additional parts must be done in accordance with the relevant
Be aware that R-32 refrigerant may not contain an odor. Place
local, state, and national regulations.
in a well ventilated area to prevent accumulation of refrigerant.
Only use tools meant for use on R-32 refrigerant, such as
Do not pierce or burn this unit.
a gauge manifold, charge hose, gas leak detector, reverse
Never use an open flame during service or repair. Never store in flow check valve, refrigerant charge base, vacuum gauge, or
a room with continuously operating ignition sources (for example: refrigerant recovery equipment.
open flames, an operating gas appliance, or an operating electric
The following guidelines align with UL Standard 60335-2-40.
heater.), where there is ignitable dust suspension in the air, or
where volatile flammables such as thinner or gasoline are
handled. Maintenance and Repair
Only use pipes, nuts, and tools intended for exclusive use with • Portable equipment shall be repaired outside or in a
R-32 refrigerant in compliance with national codes (ASHRAE15 workshop specially equipped for servicing units with
or IRC). FLAMMABLE REFRIGERANTS.
• Ensure sufficient ventilation at the repair place.
Do not mix air or gas other than R-32 in the refrigerant system.
If air enters the refrigerant system, an excessively high pressure • Be aware that malfunction of the equipment may be caused
results, which may cause equipment damage or injury. by refrigerant loss and a refrigerant leak is possible.
• Discharge capacitors in a way that won’t cause any spark.
Do not use means to accelerate the defrosting process or to
The standard procedure to short circuit the capacitor
clean, other than those recommended by the manufacturer.
terminals usually creates sparks.
• When brazing is required, the following procedures shall be
Lubrication carried out in the right order:
R-32 should be used only with polyolester (POE) oil. The HFC
— Remove the refrigerant. If the recovery is not required
refrigerant components in R-32 will not be compatible with
by national regulations, drain the refrigerant to the
mineral oil or alkylbenzene lubricants. R-32 systems will be
outside. Take care that the drained refrigerant will not
charged with the OEM recommended lubricant, ready for use
cause any danger. In doubt, one person should guard
with R-32.
the outlet. Take special care that drained refrigerant will
not float back into the building.

Competence of Personnel — Evacuate the refrigerant circuit.

— Remove parts to be replaced by cutting, not by flame.
WARNING — Purge the braze point with nitrogen during the brazing
Service on this equipment is to be performed by qualified procedure.
refrigeration personnel familiar with equipment operation, — Carry out a leak test before charging with refrigerant.
maintenance, correct servicing procedures, and the safety • Reassemble sealed enclosures accurately. If seals are
hazards inherent in this work. Causes for repeated tripping worn, replace them.
of equipment protection controls must be investigated and
• Check safety equipment before putting into service.
corrected. Disconnect all power before doing any service inside
the unit. If refrigerant leaks from the unit, there is a potential Checks to the refrigerating equipment
danger of suffocation since refrigerant will displace the air in
the immediate area. Servicing this equipment must comply with Where electrical components are being changed, they shall be
the requirements of all applicable industry related published fit for the purpose and to the correct specification. At all times
standards and local, state and federal, statutes, regulations and the manufacturer’s maintenance and service guidelines shall
codes in regards to refrigerant reclamation and venting. Avoid be followed. If in doubt, consult the manufacturer’s technical
exposing refrigerant to an open flame or other ignition source. department for assistance.

IOM 1359-1 95 WWW.DAIKINAPPLIED.COM

Refrigerant Guidelines

The following checks shall be applied to installations using • Intrinsically safe components are the only types that can
FLAMMABLE REFRIGERANTS: be worked on while live in the presence of a flammable
atmosphere. The test apparatus shall be at the correct
• if an indirect refrigerating circuit is being used, the
rating.
secondary circuit shall be checked for the presence of
refrigerant; • Replace components only with parts specified by the
manufacturer. Other parts may result in the ignition of
• marking to the equipment continues to be visible and
refrigerant in the atmosphere from a leak.
legible. Markings that are illegible shall be corrected;
• refrigerating pipe or components are installed in a position NOTICE
where they are unlikely to be exposed to any substance The use of silicon sealant can inhibit the effectiveness of some
which may corrode refrigerant containing components, types of leak detection equipment. Intrinsically safe components
unless the components are constructed of materials which do not have to be isolated prior to working on them.
are inherently resistant to being corroded or are suitably
protected against being so corroded. Cabling
Checks to electrical devices • Check that cabling will not be subject to wear, corrosion,
excessive pressure, vibration, sharp edges or any other
Repair and maintenance to electrical components shall include
adverse environmental effects. The check shall also take
initial safety checks and component inspection procedures. If
into account the effects of aging or continual vibration from
a fault exists that could compromise safety, then no electrical
sources such as compressors or fans.
supply shall be connected to the circuit until it is satisfactorily
dealt with. If the fault cannot be corrected immediately but it
is necessary to continue operation, an adequate temporary
Leak Detection
solution shall be used. This shall be reported to the owner of the Under no circumstances shall potential sources of ignition
equipment so all parties are advised. be used in the searching for or detection of refrigerant leaks.
NEVER use the following when attempting to detect flammable
Initial safety checks shall include:
refrigerant leaks:
• that capacitors are discharged: this shall be done in a safe
• A halide torch (or any other detector using a naked flame)
manner to avoid possibility of sparking;
• Substances containing chlorine
• that no live electrical components and wiring are exposed
while charging, recovering or purging the system; Detection of flammable refrigerants
• that there is continuity of earth bonding.
The following leak detection methods are deemed acceptable for
Repairs to sealed components all refrigerant systems:

• During repairs to sealed components, all electrical supplies • Electronic leak detectors may be used to detect refrigerant
shall be disconnected from the equipment being worked leaks. For FLAMMABLE REFRIGERANTS, the sensitivity of
upon prior to any removal of sealed covers, etc. If it is electronic leak detectors may not be adequate, or may need
absolutely necessary to have an electrical supply to re-calibration. (Detection equipment shall be calibrated
equipment during servicing, then a permanently operating in a refrigerant-free area.) Ensure that the detector is
form of leak detection shall be located at the most critical not a potential source of ignition and is suitable for the
point to warn of a potentially hazardous situation. refrigerant used. Leak detection equipment shall be set
at a percentage of the LFL of the refrigerant and shall be
• Particular attention shall be paid to the following to ensure
calibrated to the refrigerant employed, and the appropriate
that by working on electrical components, the casing is not
percentage of gas (25 % maximum) is confirmed.
altered in such a way that the level of protection is affected.
This shall include damage to cables, excessive number of • Leak detection fluids are also suitable for use with most
connections, terminals not made to original specification, refrigerants but the use of detergents containing chlorine
damage to seals, incorrect fitting of glands, etc. shall be avoided as the chlorine may react with the
refrigerant and corrode the copper pipe-work.Examples of
• Ensure that the apparatus is mounted securely.
leak detection fluids are:
• Ensure that seals or sealing materials have not degraded
— bubble method; or
to the point that they no longer serve the purpose of
preventing the ingress of flammable atmospheres. — fluorescent method agents
Replacement parts shall be in accordance with the • If a leak is suspected, all open flames shall be removed/
manufacturer’s specifications. extinguished.
• If a leakage of refrigerant is found which requires brazing,
Repair to intrinsically safe components all of the refrigerant shall be recovered from the system,
• Do not apply any permanent inductive or capacitance loads or isolated (by means of shut off valves) in a part of the
to the circuit without ensuring that this will not exceed the system remote from the leak. Removal of refrigerant shall
permissible voltage and current permitted for the equipment be according to instructions in “Pressure Testing and
in use. Refrigerant Evacuation”.

DAIKIN APPLIED 96 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Refrigerant Guidelines

Pressure Testing and Refrigerant — Protect from heat and direct sunlight
Evacuation • Maximum storage temperature: 40°C (104°F)

• Make sure that air or any matter other than R-32 refrigerant Fire and Explosion Protection Information
does not get into the refrigeration cycle.
Open and handle refrigerant receptacle with care. Keep ignition
• If refrigerant gas leaks occur, ventilate the area as soon as sources away. Do not smoke. Protect against electrostatic
possible. charges. Waste air is to be released into the atmosphere only via
• R-32 should always be recovered and never released suitable separators.
directly into the environment.
• Only use tools meant for use on R-32 refrigerant (such as a Commissioning
gauge manifold, charging hose, or vacuum pump adapter). • Ensure that the floor area is sufficient for the refrigerant
charge.
Removal and evacuation
• Connect the pipes and carry out a leak test before charging
When breaking into the refrigerant circuit to make repairs, or with refrigerant.
for any other purpose, conventional procedures shall be used.
• Check safety equipment before putting into service.
However, for flammable refrigerants it is important that best
practice be followed, since flammability is a consideration. Charging procedures
• The following procedure shall be adhered to: In addition to conventional charging procedures and specific unit
i. safely remove refrigerant following local and national charging guidelines on page 94, the following requirements
regulations - see “Recovery” section; shall be followed.
ii. purge the circuit with inert gas; • Ensure that contamination of different refrigerants does not
iii. evacuate; occur when using charging equipment.
• Hoses or lines shall be as short as possible to minimize the
iv. purge with inert gas;
amount of refrigerant contained in them.
v. open the circuit by cutting (if flammable refrigerant). • Cylinders shall be kept in an appropriate position according
• The refrigerant charge shall be recovered into the correct to the instructions.
recovery cylinders according to local and national codes. • Ensure that the refrigerating system is earthed prior to
For equipment containing flammable refrigerants, the charging the system with refrigerant.
system shall be purged with oxygen-free nitrogen to render
• Label the system when charging is complete (if not already).
the equipment safe for flammable refrigerants. This process
might need to be repeated several times. • Extreme care shall be taken not to overfill the refrigerating
system.
• Compressed air or oxygen shall not be used for purging
refrigerant systems. • Prior to recharging the system, it shall be pressure-
tested with the appropriate purging gas. The system shall
• For equipment containing flammable refrigerants,
be leak-tested on completion of charging but prior to
refrigerants purging shall be achieved by breaking the
commissioning. A follow up leak test shall be carried out
vacuum in the system with oxygen-free nitrogen and
prior to leaving the site.
continuing to fill until the working pressure is achieved,
then venting to atmosphere, and finally pulling down to a
vacuum.
Decommissioning
• When the final oxygen-free nitrogen charge is used, the • If the safety is affected when the equipment is put out of
system shall be vented down to atmospheric pressure to service, the refrigerant charge shall be removed before
enable work to take place. decommissioning.
• Ensure that the outlet for the vacuum pump is not close • Ensure sufficient ventilation at the equipment location.
to any potential ignition sources and that ventilation is • Be aware that malfunction of the equipment may be caused
available. by refrigerant loss and a refrigerant leak is possible.
• Discharge capacitors in a way that won’t cause any spark.
Handling and Storage • Remove the refrigerant according to details in “Recovery”
section. If recovery is not required by national regulations,
Conditions for Safe Storage drain the refrigerant to the outside. Take care that the
• Requirements to be met by storerooms and receptacles: drained refrigerant will not cause any danger. In doubt,
— Store only in unopened original receptacles one person should guard the outlet. Take special care that
drained refrigerant will not float back into the building.
— Store in a cool and dry location
• Ensure all isolation valves on the equipment are closed off.
• Further information about storage conditions:
— Keep container tightly sealed
— Store in cool, dry conditions in well sealed receptacle

IOM 1359-1 97 WWW.DAIKINAPPLIED.COM

Refrigerant Guidelines

Labeling 2. Isolate system electrically.

Equipment shall be labelled stating that it has been de- 3. Before attempting the procedure, ensure that
commissioned and emptied of refrigerant. The label shall be — mechanical handling equipment is available, if required,
dated and signed. For equipment containing FLAMMABLE for handling refrigerant cylinders;
REFRIGERANTS, ensure that there are labels on the equipment
— all personal protective equipment is available and being
stating the equipment contains FLAMMABLE REFRIGERANT.
used correctly;
— the recovery process is supervised at all times by a
Recovery competent person;
When removing refrigerant from a system, either for servicing — recovery equipment and cylinders conform to the
or decommissioning, it is recommended good practice that all appropriate standards.
refrigerants are removed safely. When transferring refrigerant
into cylinders, ensure that only appropriate refrigerant recovery 4. Pump down refrigerant system, if possible.
cylinders are employed. Ensure that the correct number of 5. If a vacuum is not possible, make a manifold so that
cylinders for holding the total system charge is available. All refrigerant can be removed from various parts of the
cylinders to be used are designated for the recovered refrigerant system.
and labelled for that refrigerant (i. e. special cylinders for the
6. Make sure that cylinder is situated on the scale before
recovery of refrigerant). Cylinders shall be complete with
recovery takes place.
pressure-relief valve and associated shut-off valves in good
working order. Empty recovery cylinders are evacuated and, if 7. Start the recovery machine and operate in accordance with
possible, cooled before recovery occurs. instructions.
The recovery equipment shall be in good working order with a 8. Do not overfill cylinders (no more than 80 % volume liquid
set of instructions concerning the equipment that is at hand and charge.
shall be suitable for the recovery of all appropriate refrigerants 9. Do not exceed the maximum working pressure of the
including, when applicable, FLAMMABLE REFRIGERANTS. cylinder, even temporarily.
If in doubt, the manufacturer should be consulted. In addition,
a set of calibrated weighing scales shall be available and in 10. When the cylinders have been filled correctly and the
good working order. Hoses shall be complete with leak-free process completed, make sure that the cylinders and the
disconnect couplings and in good condition. Before using the equipment are removed from site promptly and all isolation
recovery machine, check that it is in satisfactory working order, valves on the equipment are closed off.
has been properly maintained and that any associated electrical
components are sealed to prevent ignition in the event of a Disposal
refrigerant release. Consult manufacturer if in doubt. • Waste treatment method recommendation:
The recovered refrigerant shall be returned to the refrigerant — Must be specially treated adhering to official regulations
supplier in the correct recovery cylinder, and the relevant waste — Incineration in an adequate incinerator is recommended
transfer note arranged. Do not mix refrigerants in recovery units
— Uncleaned packaging disposal must be made according
and especially not in cylinders.
to official regulations
If compressors or compressor oils are to be removed, ensure • Ensure sufficient ventilation at the working place
that they have been evacuated to an acceptable level to make
certain that FLAMMABLE REFRIGERANT does not remain within
the lubricant. The evacuation process shall be carried out prior to The following procedure shall be adhered to:
returning the compressor to the suppliers. Only electric heating i. safely remove refrigerant following local and national
to the compressor body shall be employed to accelerate this regulations - see “Recovery” section
process. When oil is drained from a system, it shall be carried out
safely. ii. evacuate the refrigerant circuit
iii. purge the refrigerant circuit with nitrogen gas for 5
Recovery Procedure minutes
Before carrying out this procedure, it is essential that the iv. evacuate again
technician is completely familiar with the equipment and all its
detail.It is recommended good practice that all refrigerants are If compressors are to be removed, cut out the compressor and
recovered safely. drain the oil.

Prior to the task being carried out, an oil and refrigerant sample
shall be taken in case analysis is required prior to re-use of
recovered refrigerant.
It is essential that electrical power is available before the task is
commenced.
1. Become familiar with the equipment and its operation.

DAIKIN APPLIED 98 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Troubleshooting

Troubleshooting
PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS
1. Main or compressor disconnect switch open 1. Close switch.
2. Fuse blown; circuit breakers open 2. Check electrical circuits and motor windings for shorts or grounds.
Investigate for possible overloading. Check for loose or corroded connec-
tions. Replace fuse or reset breakers after fault cause is corrected
3. Thermal overloads tripped 3. Overloads are auto-reset. Check voltages, cycle times and mechanical
operations. Allow time for auto-reset
Compressor Will 4. Defective contactor or coil 4. Replace
Not Run
5. System shutdown by equipment protection 5. Determine type and cause of shutdown and correct it before restarting
devices equipment
6. No cooling required 6. None. Wait until unit calls for cooling
7. Liquid line solenoid will not open 7. Repair or replace solenoid. Check wiring
8. Motor electrical trouble 8. Check motor for opens, shorts, or burnout
9. Loose wiring 9. Check all wire junctions. Tighten all terminal screws
1. Low lift, inverted start 1. Control issues or condenser fan VFDs needed
2. Compressor running in reverse 2. Check unit and compressor for correct phasing
Compressor
3. Improper piping or support on suction or 3. Relocate, add, or remove hangers
Noisy Or Vibrat-
discharge
ing
4. Worn compressor isolator bushing 4. Replace
5. Compressor mechanical failure 5. Replace
1. Noncondensables in system 1. Extract noncondensables with approved procedures or replace charge
2. Circuit overcharged with refrigerant 2. Remove excess, check liquid subcooling
3. Optional discharge shutoff valve not open 3. Open valve
High Discharge
4. Condenser fan control wiring not correct 4. Correct wiring
Pressure
5. Fan not running 5. Check electrical circuit and fan motor
6. Dirty condenser coil 6. Clean coil
7. Air recirculation 7. Correct
1. Rapid load swings 1. Stabilize load
2. Lack of refrigerant 2. Check for leaks, repair, add charge. Check liquid sight glass
3. Fouled liquid line filter drier 3. Check pressure drop across filter drier. Replace
4. Expansion valve malfunctioning 4. Repair or replace and adjust for proper superheat
Low Suction
5. Condensing temperature too low 5. Check means for regulating condenser temperature
Pressure
6. Compressors not staging properly 6. See corrective steps - Compressor Staging Intervals Too Low
7. Insufficient water flow 7. Correct flow
8. Excess or wrong oil used 8. Recover or change oil
9. Evaporator dirty 9. Back flush or clean chemically
1. Defective capacity control 1. Replace
Compressor Will
2. Faulty sensor or wiring 2. Replace
Not Stage Up
3. Stages not set for application 3. Adjust controller setting for application
1. Control band not set properly 1. Adjust controller settings for application
2. Faulty water temperature sensor 2. Replace

Compressor 3. Insufficient water flow 3. Correct flow

Staging Intervals 4. Rapid temperature or flow swings 4. Stabilize load
Too Short
5. Oversized equipment 5. Evaluate equipment selection
6. Chiller enabled with no load/Light Loads 6. Evaluate BAS sequence and settings. Evaluate need for HGBP or
thermal inertia

IOM 1359-1 99 WWW.DAIKINAPPLIED.COM

Troubleshooting

PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS

1. Oil hang-up in remote piping 1. Review refrigerant piping and correct
2. Low oil level 2. Verify superheat, add oil
3. Loose fitting on oil line 3. Repair
4. Level too high with compressor operating 4. Confirm correct superheat, remove oil
5. Insufficient water flow - Level too high 5. Correct flow, verify superheat
Compressor Oil
Level Too High Or 6. Excessive liquid in crankcase - Level too high 6. Check crankcase heater. Check liquid line solenoid valve operation
Too Low
7. Short cycling 7. Stabilize load or correct control settings for application.
8. HGBP valve oversize or improperly set-up 8. Replace or adjust HGBP valve
9. Expansion valve operation or selection 9. Confirm superheat at minimum and maximum load conditions
10. Compressor mechanical issues 10. Replace compressor
11. Wrong oil for application 11. Verify
1. Voltage imbalance or out of range 1. Correct power supply
Motor Overload 2. Defective or grounded wiring in motor 2. Replace compressor
Relays or Circuit
Breakers Open 3. Loose power wiring or burnt contactors 3. Check all connections and tighten, replace contactors
4. High condenser temperature 4. See corrective steps for High Discharge Pressure
1. Operating beyond design conditions 1. Correct so conditions are within allowable limits
2. Discharge valve not open 2. Open valve
Compressor Ther- 3. Short cycling 3. Stabilize load or correct control settings for application
mal Protection
Switch Open 4. Voltage range or imbalance 4. Check and correct
5. High superheat 5. Adjust to correct superheat
6. Compressor mechanical failure 6. Replace compressor

DAIKIN APPLIED 100 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Appendix

Appendix
Pre-Start Checklist
Pre-Start Checklist – Scroll Compressor Chillers
Must be completed, signed, and provided to Daikin Applied sales office at least 2 weeks prior to requested start date.
Job Name
Installation Location
Customer Order Number
Model Number(s)
G.O. Number(s)
Chilled Water Piping and Condenser Water Piping for Water-cooled Chiller Yes No N/A Initials
Piping Complete
Water strainer(s) installed in piping per IOM requirements
Chilled Water System – flushed, filled, and vented; Water treatment in place
Condenser Water System (incl. cooling tower) - flushed, filled, vented; Water treatment
in place (applicable for water-cooled systems)
Pumps installed and operational (rotation checked, strainers cleaned)
Water system operated and tested; flow meets unit design requirements
Flow switch(es) - installed, wired, and ready for calibration during startup
Air vent installed on evaporator chilled water inlet piping
Glycol at design % (if applicable)
Electrical Yes No N/A Initials
Building controls operational (3-way valves, face/bypass dampers, bypass valves, etc.)
*Power leads connected to power block or optional disconnect
Power leads have been checked for proper phasing and voltage
All interlock wiring complete and compliant with Daikin Applied specifications
Power applied at least 24 hours before startup
Crankcase heaters must operate for 24+ hours before startup to maximize separation
Chiller components (EXV Sensors Transducers) installed and wired properly
*Wiring complies with National Electrical Code and local codes (See Notes)
Remote EXV wired with shielded cable
Miscellaneous Yes No N/A Initials
Unit control switches all off
Remote Evaporator / Condenser Piping factory reviewed
All refrigerant components/piping leak tested, evacuated and charged
Thermometers, wells, gauges, control, etc., installed
Minimum system load of 80% capacity available for testing/adjusting controls
SiteLineTM cloud-connected controls included and needs to be commissioned
Document Attached: Technical Breakdown from Selection Software
Document Attached: Final Order Acknowledgement
Document Attached: Remote piping approval
Notes: The most common problems delaying start-up and affecting unit reliability are:
1. Field installed compressor motor power supply leads too small. Questions: Contact the local Daikin Aplied sales representative*. State size, number
and type of conductors and conduits installed:
a. From Power supply to chiller
* Refer to NFPA 70-2017, Article 440.35
2. Remote Evaporator piping incomplete or incorrect. Provide approved piping diagrams.
3. Items on this list incorrectly acknowledged resulting in delayed start and possible extra expenses incurred by return trips.
Contractor Representative Daikin Applied Sales Representative
Signed: Signed:
Name: Name:
Company: Company:
Date: Date:
Phone/Email: Phone/Email:

IOM 1359-1
©2023 Daikin Applied Form SF-18002 101 19WWW.DAIKINAPPLIED.COM
June 2023
Appendix

Warranty Registration Form

New Chiller Start-Up Form - Warranty Registration
AGZ Scroll Compressor Chillers
This form must be completely filled out and returned to Daikin Applied (Warranty Department) within ten (10) days
of start-up in order to comply with the terms of the Daikin Applied Limited Product Warranty.
Complete and email to: CHLWarrantyStartup@daikinapplied.com

JOB INFORMATION

Job Name: Daikin Applied G.O.:

Startup Date: No. of Units at Site: Daikin Applied S.O.:
Installation Notes: Purchasing Contractor Information:

UNIT INFORMATION

Unit Model No.: Serial No.:

Component Model Number Serial Number

Compressor 1:
Compressor 2:
Compressor 3:
Compressor 4:
Compressor 5:
Compressor 6:
Benshaw/DRC Control Box M/M#: Benshaw/DRC Control Box S/N#:
Before beginning, confirm that items on the Pre-Start Checklist have been completed and initial:
Note Discrepancies here or on Page 6:

SF-20001 AGZ Warranty Registration Startup Form (11/2024) 1 www.DaikinApplied.com

DAIKIN APPLIED 102 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Appendix

PRE START-UP CHECKLIST

Pre Start-Up Checklist, All NO checks require an explanation under “Description”
Please check YES or NO

Is the unit free of visible shipping damage, corrosion, or paint problems? Yes No N/A
Is unit level and isolators installed? Yes No N/A
Does the unit meet all location, installation and service clearances per IOM Bulletin? Yes No N/A
Are all fan fastener nuts on the fans tights? Yes No N/A
Does electrical service correspond to unit nameplate? Yes No N/A
Nameplate: Volts: Hertz: Phase:
Has electrical service been checked for proper phasing at each circuit power terminal block? Yes No N/A
Has unit been properly grounded and all field wiring confirmed to unit electrical specifications? Yes No N/A
Has a fused disconnect and fuses or breaker been sized per product manual and installed per local code? Yes No N/A

Number of Conduits: Number of Wires: Wire Size:

Are all electrical power connections tight? Yes No N/A
Has power been applied for 24 hours prior to start-up? Yes No N/A
Does all field wiring conform to unit electrical specifications? Yes No N/A
Are all service and liquid line valves per the IOMM in correct position? Yes No N/A
Water Strainer installed? Brazed Plate Evaporator 0.063” (1.6mm) or smaller perforations Yes No N/A
Has a flow switch been installed per the IOM manual? Yes No N/A
Has the chilled water circuit been cleaned, flushed, and water treatment confirmed? Yes No N/A
Does the chiller water piping conform to the IOM manual? Yes No N/A
Are fans properly aligned and turn freely? Yes No N/A
Is wind impingement against the air-cooled condenser a consideration? Yes No N/A
Are the condenser coils coated? Yes No N/A

Description of unit location with respect to building structures. Include measured distances.

REFRIGERANT PIPING FOR REMOTE EVAPORATOR APPLICATIONS

Reviewed and confirmed piping is per the approved SF-99006 form submitted to the factory? Yes No N/A
Has all field piping been leak tested? (R-410a at 150 psig [1034 kPA], R-32 at 300 psig [2068 kPa]) Yes No N/A
Has system been properly evacuated and charged? Yes No N/A
Refrigerant: Circuit 1: lbs. Circuit 2: lbs.
Is a liquid line filter-drier installed in each circuit? Yes No N/A
Is a liquid line solenoid installed correctly in each circuit? Yes No N/A
Is the suction temperature sensor properly installed? Yes No N/A
SF-20001 AGZ Warranty Registration Startup Form (11/2024) 2 www.DaikinApplied.com

IOM 1359-1 103 WWW.DAIKINAPPLIED.COM

Appendix

DESIGN CONTROLS

CHILLER
Water Pressure Drop: psig (kPa) Ft. (kPa) gpm (lps)
Water Temperatures: Entering: °F (°C) Leaving: °F (°C)

CONDENSER
Design Ambient Temperatures: Entering: °F (°C) Leaving: °F (°C)
Minimum Ambient Temperatures: Entering: °F (°C) Leaving: °F (°C)

START-UP

Does unit start and perform per sequence of operation as stated in the IOM Manual? Yes No
Do condenser fans rotate in the proper directions? Yes No
HMI STATUS CHECK
Each Reading Must be Verified with Field Provided Instruments of Known Accuracy
Water Temperatures HMI Verification
Leaving Evaporator: °F (°C) °F (°C)
Entering Evaporator: °F (°C) °F (°C)
Circuit #1 Refrigerant Pressures
Evaporator: psig (kPa) psig (kPa)
Liquid Lines Pressure: psig (kPa)
Condenser Pressure: psig (kPa) psig (kPa)
Circuit #2 Refrigerant Pressures
Evaporator: psig (kPa) psig (kPa)
Liquid Lines Pressure: psig (kPa)
Condenser Pressure: psig (kPa) psig (kPa)
Circuit #1 Refrigerant Temperatures
Saturated Evaporator Temperature: °F (°C) °F (°C)
Suction Line Temperature: °F (°C) °F (°C)
Suction Superheat: °F (°C) °F (°C)
Saturated Condenser Temperature: °F (°C) °F (°C)
Liquid Line Temperature: °F (°C)
Subcooling: °F (°C)
Discharge Temperature: °F (°C)
Circuit #2 Refrigerant Temperatures:
Saturated Evaporator Temperature: °F (°C) °F (°C)
Suction Line Temperature: °F (°C) °F (°C)
Suction Superheat: °F (°C) °F (°C)
Saturated Condenser Temperature: °F (°C) °F (°C)
Liquid Line Temperature: °F (°C)
Subcooling: °F (°C)
Discharge Temperature: °F (°C)
Ambient Air Temperature: °F (°C) °F (°C)
SF-20001 AGZ Warranty Registration Startup Form (11/2024) 3 www.DaikinApplied.com

DAIKIN APPLIED 104 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Appendix

NON-MICROTECH READINGS
Water Pressure Drop: (ft) (psig) (gpm)*
NOTE: Actual DP ft ÷ Design DP ft = √ x Design GPM = Actual GPM
Does the system contain glycol? Yes No
Percentage by weight: or by volume: Glycol Type:
If the chilled water system include glycol, have the freeze protection, low pressure devices and settings
been adjusted for the actual job requirements? Detail these settings on page 8 - Remarks section Yes No

NOTE: See operation manual for low temperature on ice bank applications.

Unit Voltage Across Each Phase: L1-L2: V L2-L3: V L1-L3: V

Unit Current Per Phase: L1 amps: V L2 amps: V L3 amps: V

Compressor Current Per Phase: Compressor #1: V L1 amps: V L2 amps: V L3 amps: V
Compressor #2: V L1 amps: V L2 amps: V L3 amps: V
Compressor #3: V L1 amps: V L2 amps: V L3 amps: V
Compressor #4: V L1 amps: V L2 amps: V L3 amps: V
Compressor #5: V L1 amps: V L2 amps: V L3 amps: V
Compressor #6: V L1 amps: V L2 amps: V L3 amps: V

MICROTECH SETPOINTS
ALARM SETPOINTS MUST BE VERIFIED WITH INSTRUMENTS OF KNOWN ACCURACY

Leaving Evaporator: °F (°C) Low Pressure Hold: psig (kPa)

Reset Leaving: °F (°C) Low Pressure Unload: psig (kPa)
Reset Signal: ma Evaporator Water Freeze: psig (kPa)
Reset Option: High Pressure Cut-Out: psig (kPa)
Maximum Chilled Water Reset: °F (°C) Unit Type:
Return Setpoint: °F (°C) Number of Compressors:
Maximum Pulldown: °F (°C) Number of Stages:
Evaporator Full Load Delta T: °F (°C) Number of Fab Stages:
Evap Recirc Timer: sec. Software Version:
Start-to-stop Delay: min.
Stop-to-stop Delay: min.
Stage Up Delay: sec.
Stage Down Delay: sec.

IOMSF-20001
1359-1 AGZ Warranty Registration Startup Form (11/2024) 4 105 WWW.DAIKINAPPLIED.COM
www.DaikinApplied.com
Appendix

SITELINE (IF APPLICABLE)

Gateway Serial Number(s): MAC Address:

ICCID: Confirm ethernet cable connection: Yes No N/A
Confirm hardware is installed and wired:
Connected from two antennas to CELL MAIN and CELL DIV ports on gateway (Cellular installation) or
one antenna to WiFi/BT port on gateway (Wi-Fi installation) or LAN switch to Eth0 port on gateway
(LAN installation) Yes No N/A
Confirm Ethernet cable connected between Eth1 port on gateway and Equipment unit controller (TIP
port on MT3) Yes No N/A
Configure Wi-Fi or LAN Settings (if applicable) (Refer IM1332 Appendix A):
Wi-Fi settings configured in gateway Yes No N/A
LAN settings configured in gateway Yes No N/A
Record Signal Strength from Gateway User Interface (should be in Good or Excellent range):
Confirm cloud connectivity:
Call Controls Technical Response Center (TRC) at (866) 462-7829 to confirm data transfer: Yes No N/A
Submit Commissioning Procedure in SiteLine User Interface Yes No N/A
Has SiteLine been explained to end user? Yes No N/A
Have operator instructions been provided to end user? Yes No N/A
Hours of training:
If the answer to any of the above is “no,” explain:

SUMMARY & SIGNATURES

Are all control lines secure to prevent excess vibration and wear? Yes No
Are all gauges shut off, valve caps, and packings tight after startup? Yes No
Has the chiller been leak tested? Detail refrigerant leaks and repairs below Yes No
Refrigerant Leaks:

Repairs Made:

Items not installed per IOM Manual and/or recommended corrective actions:

Print Name Signature

Mechanical Contractor Signature: Date:
Electrical Contractor Signature: Date:
Customer Signature: Date:
Technician Signature: Date:
Daikin Applied Service Manager Review: Date:
SF-20001 AGZ Warranty Registration Startup Form (11/2024) 5 www.DaikinApplied.com

DAIKIN APPLIED 106 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Appendix

IVS SENSORLESS PUMP COMMISSIONING CHECK SHEET

FOR PUMP PACKAGE UNITS ONLY

Project Name:
Building Address:
Contractor Name:
Site Contact Name: Site Contact Number:
Your Company: Your Name:
Pump Model: Pump Tag Number:
Pump Serial: Sales Order Number:
NOTE: For independent sensorless operation, go to Section 1. For independent external sensor operation, go to Section 2. For external controller, go
to Section 3.

SECTION 1 - SENSORLESS STARTUP PROCEDURE

Complete
1. Open up and bleed pump seal flush line to verify no air has travelled into seal / seal lines
2. Change parameter 0-20 (default value is option 1601 – “Reference [Unit]”) to option 1850 “Sensorless Readout”
to display Sensorless flow readout on the top left corner of screen
3. Change parameter 0-22 (default value is option 1610 – “Power [kW]”) to option 1654 “Feedback 1 [Unit]” to
display Sensorless pressure readout on the top right corner of screen
4. Open the discharge valve and set the pump to the design duty speed and record the VFD Sensorless pressure and
flow readout (include units). This is what the actual system flow and head are.
SENSORLESS PRESSURE =
SENSORLESS FLOW =
5. Ramp the pump up or down to achieve the design flow. Record the VFD sensorless flow and pressure –this will be
your new setpoint.
SENSORLESS PRESSURE =
SENSORLESS FLOW =
6. Set parameter 20-21 to the Sensorless Pressure readout taken in previous step
7. Set parameter 22-89 to the Sensorless Flow readout taken in previous step
8. Set parameter 22-87 to a value that is 40% of the value in 20-21. You have now readjusted the quadratic control
curve to match actual site conditions.
9. Change parameter 0-20 back to the default value of option 1601 – “Reference [Unit]”
10. Change parameter 0-22 back to the default value of option 1610 – “Power [kW]”
11. Put the VFD into AUTO mode. The pump will ramp up to get to the setpoint pressure and as the demand in the
system decreases, the setpoint will also decrease to ride the control curve down to the minimum pressure set in
parameter 22-87. As demand increases, it will ride back up the control curve to full design setpoint.

SF-20001
DAIKIN AGZ Warranty Registration Startup Form (11/2024)
APPLIED 6 107 www.DaikinApplied.com
TRAILBLAZER AIR-COOLED SCROLL CHILLER
Appendix

SECTION 2- EXTERNAL SENSOR STARTUP PROCEDURE

Complete
1. Open up and bleed pump seal flush line to verify no air has travelled into seal / seal lines 2a. If your sensor provides
a voltage (V) signal, go to step 3
2. a. If your sensor provides a voltage (V) signal, go to step 3.
b. your sensor provides a milliamp (mA) signal, make sure switch S202 for A54 (located behind the keypad) is
pushed to the ON position (to the right) and go to step 5.
3. Change parameter 6-20 to match the low end of voltage signal from the sensor (eg: if your sensor provides a
0-10V signal, enter 0). Go to step 4.
4. Change parameter 6-21 to match the high end of voltage signal from the sensor (eg: if your sensor provides a
0-10V signal, enter 10). Go to step 7.
5. Change parameter 6-22 to match the high end of current signal from the sensor (eg: if your sensor provides a
4-20mA signal, enter 4). Go to step 6.
6. Change parameter 6-23 to match the high end of current signal from the sensor (eg: if your sensor provides a
4-20mA signal, enter 20). Go to step 7.
7. Change parameter 20-00 (default value is option 105 – “Sensorless Pressure”) to option 2 “Analog input 54” to
make drive look at sensor reading for feedback value
8. Change parameter 20-12 to the unit that matches your sensor measurement units (eg: if you have a pressure sen-
sor, it will be in units of pressure like psi)
9. Change parameter 20-13 to the value that matches the bottom end of your sensor measurement scale (eg: if your
pressure sensor measures from 2-100psi, you enter a value of 2)
10. Change parameter 20-14 to the value that matches the high end of your sensor measurement scale (eg: if your
pressure sensor measures from 2-100psi, you enter a value of 100)
11. Set parameter 20-21 the setpoint you want the pump to maintain
12. Change parameter 22-80 (default value is 1 “Enabled”) to option 0 “Disabled”
13. Put the VFD into AUTO mode – it will now display the sensor reading in the center of the screen and the target
setpoint on the top left of the screen. It will ramp up / down to meet the setpoint based on the sensor reading.

SECTION 3 – EXTERNAL CONTROLLER (BAS) STARTUP PROCEDURE

Complete
1. Open up and bleed pump seal flush line to verify no air has travelled into seal / seal lines
2. Change parameter 0-20 to option 1602 “Reference %” to show the percent speed signal on top left corner
3. Change parameter 1-00 to option 0 “Open Loop” (drive will ‘listen’ for external speed reference)
4. Change parameter 3-02 to “0” (this is the minimum speed signal)
5. Change parameter 3-03 to “60” (this is the maximum speed signal)
6. Change parameter 3-15 to option 1 “Analog Input 53”
7. Put the VFD into AUTO mode – the VFD will now ramp up / down based on the analog speed signal it receives on
terminal 53. You can check what the drive is seeing on the input by going to parameter 16-62.

SF-20001 AGZ Warranty Registration Startup Form (11/2024) 7 www.DaikinApplied.com

DAIKIN APPLIED 108 TRAILBLAZER AIR-COOLED SCROLL CHILLER

Appendix

Limited Product Warranty

DAIKIN APPLIED AMERICAS INC.

LIMITED PRODUCT WARRANTY
(United States and Canada)

WARRANTY
Daikin Applied Americas Inc. dba Daikin Applied (“Company”) warrants to contractor, purchaser and any owner of the product
(collectively “Owner”) that, subject to the exclusions set forth below Company, at its option, will repair or replace defective parts in
the event any product manufactured by Company, including products sold under the brand name Daikin and used in the United States
or Canada, proves defective in material or workmanship within twelve (12) months from initial startup or eighteen (18) months from
the date shipped by Company, whichever occurs first. Authorized replacement parts are warranted for the remainder of the original
warranty. All shipments of such parts will be made FOB factory, freight prepaid and allowed. Company reserves the right to select
carrier and method of shipment. In addition, Company provides labor to repair or replace warranty parts during Company normal
working hours on products with rotary screw compressors or centrifugal compressors. Warranty labor is not provided for any other
products.

Company must receive the Registration and Startup Forms for products containing motor compressors and/or furnaces within ten (10)
days of original product startup, or the ship date and the startup date will be deemed the same for determining the commencement
of the warranty period and this warranty shall expire twelve (12) months from that date. For additional consideration, Company will
provide an extended warranty(ies) on certain products or components thereof. The terms of the extended warranty(ies) are shown on
a separate extended warranty statement.

No person (including any agent, sales representative, dealer or distributor) has the authority to expand the Company’s obligation
beyond the terms of this express warranty or to state that the performance of the product is other than that published by Company.

EXCLUSIONS
1. If free warranty labor is available as set forth above, such free labor does not include diagnostic visits, inspections, travel time and
related expenses, or unusual access time or costs required by product location.
2. Refrigerants, fluids, oils and expendable items such as filters are not covered by this warranty.
3. This warranty shall not apply to products or parts : (a) that have been opened, disassembled, repaired, or altered, in each case by
anyone other than Company or its authorized service representative; (b) that have been subjected to misuse, abuse, negligence,
accidents, damage, or abnormal use or service; (c) that have not been properly maintained; (d) that have been operated or
installed, or have had startup performed, in each case in a manner contrary to Company's printed instructions; (e) that have been
exposed, directly or indirectly, to a corrosive atmosphere or material such as, but not limited to, chlorine, fluorine, fertilizers,
waste water, urine, rust, salt, sulfur, ozone, or other chemicals, contaminants, minerals, or corrosive agents; (f) that were
manufactured or furnished by others and/or are not an integral part of a product manufactured by Company; or (g) for which
Company has not been paid in full.
4. This warranty shall not apply to products with rotary screw compressors or centrifugal compressors if such products have not
been started, or if such startup has not been performed, by a Daikin Applied or Company authorized service representative.

SOLE REMEDY AND LIMITATION OF LIABILITY

THIS WARRANTY CONSTITUTES THE SOLE WARRANTY MADE BY COMPANY. COMPANY'S LIABILITY TO OWNER AND OWNER’S
SOLE REMEDY UNDER THIS WARRANTY SHALL NOT EXCEED THE LESSER OF: (i) THE COST OF REPAIRING OR REPLACING
DEFECTIVE PRODUCTS; AND (ii) THE ORIGINAL PURCHASE PRICE ACTUALLY PAID FOR THE PRODUCTS. COMPANY MAKES NO
REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, REGARDING PREVENTION OF MOLD/MOULD, FUNGUS, BACTERIA,
MICROBIAL GROWTH, OR ANY OTHER CONTAMINATES. THIS WARRANTY IS GIVEN IN LIEU OF ALL OTHER WARRANTIES,
INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
AND NON-INFRINGEMENT, WHICH ARE HEREBY DISCLAIMED. IN NO EVENT AND UNDER NO CIRCUMSTANCE SHALL COMPANY
BE LIABLE TO OWNER OR ANY THIRD PARTY FOR INCIDENTAL, INDIRECT, SPECIAL, CONTINGENT, CONSEQUENTIAL, DELAY OR
LIQUIDATED DAMAGES FOR ANY REASON, ARISING FROM ANY CAUSE WHATSOEVER, WHETHER THE THEORY FOR RECOVERY IS
BASED IN LAW OR IN EQUITY, OR IS UNDER A THEORY OF BREACH CONTRACT OR WARRANTY, NEGLIGENCE, STRICT LIABILITY,
OR OTHERWISE. THE TERM “CONSEQUENTIAL DAMAGE” INCLUDES, WITHOUT LIMITATION, THOSE DAMAGES ARISING FROM
BUSINESS INTERRUPTION OR ECONOMIC LOSS, SUCH AS LOSS OF ANTICIPATED PROFITS, REVENUE, PRODUCTION, USE,
REPUTATION, DATA OR CROPS.

ASSISTANCE
To obtain assistance or information regarding this warranty, please contact your local sales representative or a Daikin Applied office.

Form No. 933-430285Y-01-A (11/2023)

Part No. 043028500 Rev.0F

IOM 1359-1 109 WWW.DAIKINAPPLIED.COM

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