Heat Pump System Wiring - Honeywell TB7220U Installation Instructions Manual

TB7220U ULTRASTAT PROGRAMMABLE THERMOSTAT

Heat Pump System Wiring

L1
(HOT)
24 VAC
C
L2 G
1
Y
4 O/B
RC
R
CHANGEOVER VALVE
COMPRESSOR CONTACTOR
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
1
PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER.
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.
Fig. 13. Typical hookup of single-stage heat pump
with no auxiliary heat (1H/1C).
L1
(HOT)
24 VAC
C
L2 G
1
Y
O/B
4
RC
R
FAN RELAY
CHANGEOVER VALVE
COMPRESSOR 1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
1
PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER.
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.
Fig. 14. Typical hookup of multistage heat pump with
no auxiliary heat (2H/2C).
62-0223—1
3
2
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
FAN RELAY
3
2
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
COMPRESSOR 2
L1
(HOT)
24 VAC
L2
1
W1
Y2
S1
S2
COMPRESSOR CONTACTOR
5
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
1
PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
3
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.
M23059
Fig. 15. Typical hookup of single-stage heat pump
L1
(HOT)
24 VAC
L2
W1
1
Y2
S1
S2
5
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
1
PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
3
IS OPTIONAL.
4
"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B"
IN THE INSTALLER SETUP.
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.
5
WIRES MUST HAVE A CABLE SEPARATE FROM THE
THERMOSTAT CABLE.
M23061
Fig. 16. Typical hookup of multistage heat pump
6
3
C
G
Y
O/B
4
RC
2
R
CHANGEOVER VALVE
FAN RELAY
with auxiliary heat (2H/1C).
3
C
G
Y
O/B
4
RC
2
R
CHANGEOVER VALVE
COMPRESSOR 1
FAN RELAY
COMPRESSOR 2
with auxiliary heat (3H/2C).
W1
Y2
S1
S2
OUTDOOR/INDOOR
TEMPERATURE
5
SENSOR
AUXILIARY HEAT RELAY
M23062
W1
Y2
S1
S2
OUTDOOR/INDOOR
TEMPERATURE
5
SENSOR
AUXILIARY HEAT RELAY
M23063