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TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
YES
NO
6. Insert the mounting screws into the wall anchors and tighten.
DRILLED
HOLES (2)
WALL
ANCHORS (2)
NO
NO 5 FEET
[1.5 METERS]
WALLPLATE
M22258
Fig. 1. Select thermostat location.
Do not install the thermostat where it can be affected by:
— Drafts or dead spots behind doors and in corners.
— Hot or cold air from ducts.
— Radiant heat from sun or appliances.
— Concealed pipes and chimneys.
— Unheated (uncooled) areas such as an outside wall behind the thermostat.
Separate Wallplate from
Thermostat
1. Separate the wallplate from the thermostat. See
Fig. 2.
WALLPLATE
WIRE HOLE
THERMOSTAT
M22267
Fig. 2. Separate wallplate from thermostat.
Install Wallplate (See Fig. 3)
Mount the thermostat horizontally on the wall:
1. Pull the wires through the wire hole on the wallplate.
2. Position the wallplate on the wall with the arrow pointing up. Level the wallplate for appearance only.
3. Use a pencil to mark the mounting holes.
4. Remove the wallplate from the wall and drill two
3/16 in. holes in the wall (if drywall) as marked. For firmer material such as plaster, drill two 7/32 in. holes. Tap the wall anchors (provided) into the drilled holes until flush with the wall.
5. Pull the wires through the wire hole on the wallplate and position the wallplate over the wall anchors.
M22268
MOUNTING
SCREWS (2)
Fig. 3. Install wallplate.
WIRING
IMPORTANT
— All wiring must agree with applicable codes, ordinances and regulations.
— Use 18 gauge thermostat wire. Shielded cable is not required.
NOTES:
— Sensor wires must have a cable separate from the thermostat control cable.
— Refer to Table 2 for terminal designation descriptions.
— See Fig. 6 through 16 for wiring diagrams for specific equipment applications.
1. Select set of terminal identifications that correspond to your system type (conventional or heat pump).
(See Fig. 4).
C
G
Y
O/B
RC
R
SCREW
TERMINALS
C
G
Y
W
RC
R
W2
Y2
A
S1
S2
W1
Y2
A
S1
S2
CONVENTIONAL
HEAT PUMP
M23010
Fig. 4. Terminal identifications for system type.
2. Loosen screw terminals used for the application.
3. Insert the wires into the terminal block and tighten each screw terminal.
4. Push excess wire back into the wall opening and restrict wires to the shaded area. See Fig. 5.
5. Plug the wall opening with nonflammable insulation to prevent drafts from affecting the thermostat.
62-0221—05 2
WIRE WALLPLATE
TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
WALL OPENING
SHADED AREA
M22266
Fig. 5. Restrict wires to shaded area of wire hole.
Terminal Designation
RC (see Note 1)
R (see Note 1)
Y
C (see Note 2)
W
G
W2
Y2
O/B (see Note 3)
A (see Note 4)
S1 (See Note 5)
S2 (See Note 5)
W1
Table 2. Terminal Designation Descriptions.
Description
Power for cooling—connect to secondary side of cooling system transformer.
Power for heating—connect to secondary side of heating system transformer.
Compressor output.
Common wire from secondary side of cooling system transformer.
Heat relay.
Fan relay.
Second stage heat relay.
Second stage cooling.
Changeover valve for heat pumps.
Economizer/Time-Of-Day (TOD) output—powered via RC terminal.
Optional outdoor or indoor remote sensor.
Optional outdoor or indoor remote sensor.
Auxiliary Heat Relay Output (Head Pump Mode 2H/1C, 3H/2C)
NOTES:
1.
2.
3.
4.
5.
When used in a single-transformer system, leave metal jumper wire in place between RC and R. If used on a two-transformer system, remove metal jumper wire between RC and R.
Common wire is optional when thermostat is used with batteries. When using separate transformers for heating and cooling, the common must come from the cooling transformer.
If thermostat is configured for a heat pump in the Installer Setup, configure changeover valve for cool (O-factory setting) or heat (B).
Reference economizer literature for wiring details. When set for economizer operation, the A terminal provides the occupancy signal.
(Power indicates occupied.)
Sensor wires must have a cable separate from the thermostat control cable.
Terminal “A” Wiring Details for
Economizers
— Wire the A terminal to the W7212 “N” terminal, or the
W7459 “TR” terminal.
— When using dual transformers at the thermostat, the cooling transformer must power the economizer.
— The A signal is powered from the RC terminal and energizes the economizer to signal occupied status and drive the damper to the set minimum position.
Table 3. Wiring Diagrams.
System Type
Standard Heat/Cool
Heat Only
Heat Only with Fan
Cool only
Standard Multistage up to 2 Heat/2 Cool
Heat Pump
(No Auxiliary Heat)
Wallplate
Terminal
Identifications
Conventional
Conventional
Conventional
Conventional
Conventional
Heat Pump
Heat Pump
(with Auxiliary Heat)
Heat Pump
Multiple TR21 Sensors
Multiple C7189U Sensors —
3
—
Wiring
Diagram
Figure
6, 7
8
9
10
11, 12
13, 14
15, 16
17, 18, 19
20
62-0221—05
TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
Conventional System Wiring
1
L1
1
(HOT)
L2
24 VAC
2
HEAT RELAY
COMPRESSOR CONTACTOR
FAN RELAY
C
G
Y
W
RC
R
3
W2
Y2
A
S1
S2
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
2
3
ECONOMIZER
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
M23011
Fig. 6. Typical wiring of single transformer
1H/1C system.
L2 24 VAC
2
C
G
Y
W
RC
R
3
W2
Y2
A
S1
S2
HEAT RELAY
ECONOMIZER
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION IS
OPTIONAL.
M23013
Fig. 8. Typical hookup of heat-only system.
1
L1
(HOT)
L2
24 VAC
2
C
G
Y
W
RC
R
3
W2
Y2
A
S1
S2
L1
1
(HOT)
24 VAC
L2
COOLING
TRANSFORMER
2
C
G
Y
W
RC
R
3 W2
Y2
A
S1
S2
1
L1
(HOT)
24 VAC
L2
HEATING
TRANSFORMER
FAN RELAY
COMPRESSOR CONTACTOR
HEAT RELAY
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
ECONOMIZER
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
REMOVE FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL. WHEN USED, THE COMMON MUST CONNECT
TO THE COOLING TRANSFORMER SECONDARY.
M23012
Fig. 7. Typical hookup of dual transformer
1H/1C system.
HEAT RELAY
FAN RELAY
ECONOMIZER
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER.
3 WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
M23014
Fig. 9. Typical hookup of heat-only system with fan.
1
L1
(HOT)
L2
24 VAC
2
C
G
Y
W
RC
R
3
W2
Y2
A
S1
S2
COMPRESSOR CONTACTOR
FAN RELAY
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
2
3
ECONOMIZER
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
M23015
Fig. 10. Typical hookup of cool-only system.
62-0221—05 4
TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
L2
1
24 VAC
2
C
G
Y
W
RC
R
3 W2
Y2
A
S1
S2
COOL RELAY 1 COOL RELAY 2
FAN RELAY
HEAT RELAY 1
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
HEAT RELAY 2
ECONOMIZER
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
M23016
Fig. 11. Typical hookup of single transformer multistage system (up to 2H/2C).
1
L1
(HOT)
L2
24 VAC
2
C
G
Y
W
RC
R
3
W2
Y2
A
S1
S2
1
FAN RELAY
COOL RELAY 1 COOL RELAY 2
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
2
3
HEAT RELAY 1
HEAT RELAY 2
ECONOMIZER
24 VAC
L2
HEATING
TRANSFORMER
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
REMOVE FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL. WHEN USED, THE COMMON MUST CONNECT
TO THE COOLING TRANSFORMER SECONDARY.
M23017
Fig. 12. Typical hookup of dual transformer multistage system (up to 2H/2C).
5 62-0221—05
TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
Heat Pump System Wiring
L1
(HOT)
L2
1
24 VAC
3
W1
Y2
A
S1
S2
CHANGEOVER VALVE
COMPRESSOR CONTACTOR
FAN RELAY
2 FACTORY INSTALLED JUMPER.
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
ECONOMIZER
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
5
3 WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
4 "O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B"
IN THE INSTALLER SETUP.
5 OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.
WIRES MUST HAVE A CABLE SEPARATE FROM THE
THERMOSTAT CABLE.
M23018
Fig. 13. Typical hookup of single-stage heat pump with no auxiliary heat (1H/1C).
L1
(HOT)
4 O/B
RC
R
C
G
Y
2
3
L2
1
24 VAC
4
C
G
Y
O/B
RC
R
2
W1
Y2
A
S1
S2
FAN RELAY
CHANGEOVER VALVE
COMPRESSOR 1 COMPRESSOR 2
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
5
ECONOMIZER
2
3
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
4 "O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B"
IN THE INSTALLER SETUP.
5 OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.
WIRES MUST HAVE A CABLE SEPARATE FROM THE
THERMOSTAT CABLE.
M23019
Fig. 14. Typical hookup of multistage heat pump with no auxiliary heat (2H/2C).
L1
(HOT)
L2
1
24 VAC
4
C
G
Y
O/B
RC
R
2
CHANGEOVER VALVE
COMPRESSOR CONTACTOR
FAN RELAY
ECONOMIZER
3
W1
Y2
A
S1
S2
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
5
AUXILIARY HEAT RELAY
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
3
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
4 "O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B"
IN THE INSTALLER SETUP.
5 OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.
WIRES MUST HAVE A CABLE SEPARATE FROM THE
THERMOSTAT CABLE.
M23020
Fig. 15. Typical hookup of single-stage heat pump with auxiliary heat (2H/1C).
L2
1
24 VAC
4
C
G
Y
O/B
RC
R
2
3
W1
Y2
A
S1
S2
CHANGEOVER VALVE
COMPRESSOR 1
FAN RELAY
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
5
AUXILIARY HEAT RELAY
COMPRESSOR 2
ECONOMIZER
2
3
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
4
5
"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B"
IN THE INSTALLER SETUP.
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.
WIRES MUST HAVE A CABLE SEPARATE FROM THE
THERMOSTAT CABLE.
M23021
Fig. 16. Typical hookup of multistage heat pump with auxiliary heat (3H/2C).
62-0221—05 6
TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
Sensor Wiring for Temperature
Averaging
S1
SUBBASE
S2
TR21
SUBBASE
S1 S2
TR21
T T T T
TR21
T T T4
1
TR21-A
T3
TR21
T T
TR21 TR21
T T T T
M27481
Fig. 17. Wiring four T7770A1006 (20K ohm) Sensors.
S1
SUBBASE
S2
1 THE TR21-A IS A 10K OHM SENSOR.
M27483
Fig. 19. Wiring two TR21 (20K ohm) Sensors and one
TR21-A (10K ohm) sensor to provide a temperature averaging network
S1
SUBBASE
S2
1
C7189 C7189
T4 T3 T4 T3
C7189 C7189
1
TR21-A
1
TR21-A
1 THE TR21-A IS A 10K OHM SENSOR.
M27482
Fig. 18. Wiring two TR21-A (10K ohm) Sensors to provide a temperature averaging network.
1 WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
M23027
Fig. 20. Wiring four C7189U (10K ohm) Sensors to provide a temperature averaging network.
7 62-0221—05
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