24- 9902- 18, Rev.

Installation Instructions T2000 Series

Issue Date March 2016

T2000 Series Low Voltage Fan Coil Thermostats

• air handling units
Application
T2000ACx-0C0
IMPORTANT: Use this T2000 Series Low
Voltage Fan Coil Thermostat only as an operating On the T2000ACx-0C0, switch positions HEAT, OFF,
control. Where failure or malfunction of thermostat and COOL provide separate temperature control in the
could lead to personal injury or property damage to controlled space. A second switch controls the
the controlled equipment or other property, LOW-MED-HIGH fan motor speeds.
additional precautions must be designed into the
control system. Incorporate and maintain other T2000ECx-0C0
devices, such as supervisory or alarm systems or On the T2000ECx-0C0, switch positions provide ON
safety or limit controls, intended to warn of or protect and OFF temperature control in the controlled space.
against failure or malfunction of the thermostat. A second switch controls the LOW-MED-HIGH fan
motor speeds.
IMPORTANT : Utiliser ce Low Voltage Fan Coil
Thermostat uniquement en tant que dispositif de
Installation
régulation. Lorsqu'une défaillance ou un
dysfonctionnement du thermostat risque de Install the T2000 where the occupant can read and
provoquer des blessures ou d'endommager adjust the setpoint dial selector easily. Situate the
l'équipement contrôlé ou un autre équipement, la thermostat where the temperature is representative of
conception du système de contrôle doit intégrer des the general room conditions. Avoid installing the
dispositifs de protection supplémentaires. Veiller T2000 near cold or warm air drafts, radiant heat, on an
dans ce cas à intégrer de façon permanente d'autres outside wall, or in direct sunlight.
dispositifs, tels que des systèmes de supervision ou
d'alarme, ou des dispositifs de sécurité ou de Parts Included
limitation, ayant une fonction d'avertissement ou de One T2000xCx-0C0 low voltage fan coil thermostat.
protection en cas de défaillance ou de
dysfonctionnement du thermostat. Mounting
The T2000ACx (Heat-Off-Cool) and T2000ECx Mount the T2000 Series thermostat to a
(On-Off) low voltage fan coil thermostats feature local 2 x 4 in. (51 x 102 mm) standard U.S. wallbox.
control of High, Medium, and Low fan speeds. Follow the instructions for removing the cover and then
The plastic enclosure features a removable cover proceed to the Wallbox Mounting and the Wiring
imprinted with either a Fahrenheit or a Celsius scale, sections.
providing direct access to the adjustable temperature Note: All T2000 Series models require two No. 6
setpoint dial and control switches. The main mounting screws (not included).
thermostatic element is a gas-filled bellows that drives
an integral snap-action two-position electrical switch. Removing the Cover
The adjustable setpoint knob sits over the element on
To remove the cover from the base, insert a 1/8 in.
a Printed Circuit Board (PCB) along with two terminal
(3.2 mm) Phillips screwdriver into the retention screw
blocks and two control switches. The PCB sits on the
located in the center of the top of the cover. Loosen
PCB Support, which is hinged at the bottom to the
(but do not remove) the Phillips head screw and gently
plastic base, swinging free at the top to provide easy
pull the cover away from the base until it is free.
access during mounting and wiring.
(See Figure 1.)
Typical low voltage applications are:
• fan coil units
• electric heaters

© 2016 Johnson Controls, Inc. 1

Part No. 24-9902-18, Rev. B www.johnsoncontrols.com
 Retention Screw Base Retaining Screw

65 70
75 PCB Support
60
Base Latch
80
55

85
50
5-1/4 3.28
(133) (83.4)

HEAT HIGH
OFF MED
COOL LOW

PCB Support
Base Hinge

3-15/32 (88) 1-2/3 (42.5)

Figure 1: T2000xCF-0C0 Cover and Case

Dimensions, in. (mm) PCB Support
(Back)
Wallbox Mounting
To mount the T2000-base to the to standard
PCB Support
U.S. wallbox, refer to Figure 1 and Figure 2 and: Base Latch Notch
1. Depress the PCB support latch, located above the
temperature setpoint switch in the upper Figure 2: T2000xCx-0C0 Base with PCB Support
right-hand corner of the PCB support, and gently Mounting Dimensions
pushing downward, swing the top of the PCB 2. Pull the wiring through the square hole in the
support away from the unit. base.
Note: The PCB support will remain attached at the 3. Fasten the base to the wallbox using the two
bottom of the base, providing access to the mounting vertical holes and two No. 6 screws (not provided)
and wiring holes.
4. Pull the wiring through the square hole in the PCB
support and gently snap the PCB support to the
IMPORTANT: Do not remove PCB from the PCB PCB Support Base Latch.
support. Removing the PCB from the PCB support
voids the product warranty. 5. Proceed to the Wiring section for the correct
configuration for the application and unit.
Note: The factory-calibrated T2000 thermostat
requires no field adjustment. Do not attempt
recalibration.
6. Reposition the cover and tighten the retention
screw.

Wiring
IMPORTANT: Make all wiring connections in
accordance with local, national, and regional
regulations. Do not exceed the T2000 Series
thermostat’s electrical ratings.

2 T2000 Series Low Voltage Fan Coil Thermostats Installation Instructions

Model T2000ACx-0C0 Model T2000ECx-0C0
Wiring terminal designations appear in Table 1. Wiring Wiring terminal designations appear in Table 2 Wiring
connections for typical T2000ACx applications appear connections for typical T2000ECx applications appear
in Figure 3 and Figure 4. in Figure 5 and Figure 6.

Table 1: T2000ACx-0C0 Wiring Terminals Table 2: T2000ECx-0C0 Wiring Terminals

Model T2000ACx-0C0 Model T2000-ECx-0C0
Terminal Number Connection Terminal Number Connection
1 Heating Valve + 3 Heating Valve Common
2 Common 4 High Fan Speed
3 Heating Valve Common 5 Cooling Valve Common
4 High Fan Speed 6 Low Fan Speed
5 Cooling Valve Common 7 Medium Fan Speed
6 Low Fan Speed 8 24 VAC Power
7 Medium Fan Speed
8 24 VAC Power
9 Cooling Valve COOL (C)
System: ON-OFF Valve
Fan:
HIGH-MED-LOW
System:
3 4 5
HEAT-OFF-COOL
Fan: HEAT (H)/
HIGH-MED-LOW COOL (C)
Valve
1 2 3 4 5
HIGH
H
MED
M
LOW
L
HIGH 8 7 6
MED H 24 VAC
M
LOW All Wiring to be
L
Supplied by Installers
9 8 7 6
24 VAC
All Wiring to be
Supplied by Installers Figure 5: Wiring the T2000ECx-0C0 for Cooling
Only: 2-Pipe System with 3-Speed Fan Control

Figure 3: Wiring the T2000ACx-0C0 for HEAT (H)/

Heating/Cooling Only: 2-Pipe System System: ON-OFF COOL (C)
with 3-Speed Fan Control Fan: Strap-on Valve
HIGH-MED-LOW Thermostat
3 4 5 Winter
System: COOL HEAT
HEAT-OFF-COOL (C) (H) Summer
Fan: Valve Valve
HIGH-MED-LOW HIGH
1 2 3 4 5 H
MED
M
LOW
L
8 7 6
HIGH 24 VAC
H All Wiring to be
MED
M Supplied by Installers
LOW
L
9 8 7 6
24 VAC Figure 6: Wiring the T2000ECx-0C0 for
All Wiring to be
Supplied by Installers Heating/Cooling Only: 2-Pipe System with 3-Speed
Fan Control and Automatic Changeover

Figure 4: Wiring the T2000ACx-0C0 for

Heating/Cooling Only: 4-Pipe System
with 3-Speed Fan Control

T2000 Series Low Voltage Fan Coil Thermostats Installation Instructions 3

Troubleshooting Repairs and Replacement
For the ACx thermostat to function properly, the Do not attempt to repair the T2000 Series thermostat.
Heat-Off-Cool switch must be fully in the desired In case of an improperly functioning control, contact
position. For the ECx thermostat to function, the the nearest Johnson Controls® representative, and
ON/OFF switch must be fully in the ON position. specify the desired product code number. When
contacting the supplier for a replacement please state
the type/model number of the control located on the
data plate or cover label.

Technical Specifications
Product T2000ACC-0C0 Low Voltage Heat-Off-Cool Wallbox Fan Coil
Thermostat with Celsius Temperature Setpoint Scale
T2000ACF-0C0 Low Voltage Heat-Off-Cool Wallbox Fan Coil
Thermostat with Fahrenheit Temperature Setpoint Scale
T2000ECC-0C0 Low Voltage On-Off Wallbox Fan Coil Thermostat
with Celsius Temperature Setpoint Scale
T2000ECF-0C0 Low Voltage On-Off Wallbox Fan Coil Thermostat
with Fahrenheit Temperature Setpoint Scale
Power Requirements 24 VAC at 50/60 Hz, Class 2
Thermostat Switch Setpoint Range 50 to 85°F; (10 to 30°C)
System Switch ACx Models: Double-Pole, Triple Throw (DP3T)
ECx Models: Double-Pole, Double Throw (DPDT)
Fan Switch All Models: Double-Pole, Triple Throw (DP3T)
Low Voltage Control Current: 2 A 2 A, Non-Inductive
Ratings Power: 48 VA, Class 2
Ambient Operating 44 to 85°F; (7 to 30°C) 85% Noncondensing RH
Conditions*
Ambient Storage -40 to 122°F; (-40 to 50°C) 85% Noncondensing RH
Conditions*
Dimensions 3.46 x 5.24 x 1.91 in. (88 x 133 x 49 mm)
Shipping Weight 0.55 lb (0.26 kg)
* Operating or storing this thermostat at temperatures outside the stated limits can result in damage to the bellows.
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these
specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or
misuse of its products.

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CHINA

Building Efficiency
507 E. Michigan Street, Milwaukee, WI 53202

Metasys® and Johnson Controls® are registered trademarks of Johnson Controls, Inc.
All other marks herein are the marks of their respective owners. © 2016 Johnson Controls, Inc.

4 T2000 Series Low Voltage Fan Coil Thermostats Installation Instructions