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TB7220 COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
63-2635—03 8
Fig. 16. Typical hookup of single transformer multistage
system (up to 2H/2C).
Fig. 17. Typical hookup of dual transformer multistage
system (up to 2H/2C).
Heat Pump System Wiring
Fig. 18. Typical hookup of single-stage heat pump with no
auxiliary heat (1H/1C).
Fig. 19. Typical hookup of multistage heat pump with no
auxiliary heat (2H/2C).
M23016
HEAT RELAY 2
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
FAN RELAY
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
1
3
2
3
COOL RELAY 1
HEAT RELAY 1
COOL RELAY 2
L1
(HOT)
L2
1
24 VAC
ECONOMIZER
C
G
Y
W
RC
R
W2
Y2
A
S1
S2
2
M23017
HEAT RELAY 2
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
FAN RELAY
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.
1
3
2
3
COOL RELAY 1
HEAT RELAY 1
COOL RELAY 2
L1
(HOT)
L2
1
24 VAC
L1
(HOT)
L2
1
24 VAC
ECONOMIZER
C
G
Y
W
RC
R
W2
Y2
A
S1
S2
2
COOLING
TRANSFORMER
HEATING
TRANSFORMER
COMPRESSOR CONTACTOR
M23018
CHANGEOVER VALVE
1
2
3
4
5
FAN RELAY
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
"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.
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
3
L1
(HOT)
L2
1
24 VAC
5
ECONOMIZER
C
G
Y
O/B
RC
R
W1
Y2
A
S1
S2
4
2
COMPRESSOR 1
COMPRESSOR 2
M23019
CHANGEOVER VALVE
FAN RELAY
1
2
3
4
5
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
"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.
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
3
L1
(HOT)
L2
1
24 VAC
5
ECONOMIZER
C
G
Y
O/B
RC
R
W1
Y2
A
S1
S2
4
2