Conventional System Wiring - Honeywell TB7220U Installation Instructions Manual
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Also See for TB7220U:
- Owner's manual (32 pages) ,
- Installation instructions manual (17 pages)
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TB7220U ULTRASTAT PROGRAMMABLE THERMOSTAT
Conventional System Wiring
1
L1
(HOT)
24 VAC
L2
HEAT RELAY
COMPRESSOR CONTACTOR
FAN RELAY
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.
Fig. 6. Typical wiring of single transformer
1H/1C system.
1
L1
(HOT)
24 VAC
L2
COOLING
TRANSFORMER
FAN RELAY
1
COMPRESSOR CONTACTOR
L1
(HOT)
24 VAC
L2
HEATING
TRANSFORMER
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
REMOVE FACTORY INSTALLED JUMPER.
3
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL. WHEN USED, THE COMMON MUST CONNECT
TO THE COOLING TRANSFORMER SECONDARY.
Fig. 7. Typical hookup of dual transformer
1H/1C system.
62-0223—1
3
C
W2
Y2
G
Y
S1
W
S2
RC
2
R
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
3
W2
C
G
Y2
Y
W
S1
S2
RC
2
R
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
HEAT RELAY
1
L1
(HOT)
L2
24 VAC
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.
Fig. 8. Typical hookup of heat-only system.
M23053
1
L1
(HOT)
24 VAC
L2
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.
Fig. 9. Typical hookup of heat-only system with fan.
1
L1
(HOT)
24 VAC
M23054
L2
COMPRESSOR CONTACTOR
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.
Fig. 10. Typical hookup of cool-only system.
4
3
C
G
Y
W
RC
2
R
OUTDOOR/INDOOR
HEAT RELAY
3
C
G
Y
W
RC
2
R
HEAT RELAY
OUTDOOR/INDOOR
FAN RELAY
3
C
G
Y
W
RC
2
R
OUTDOOR/INDOOR
FAN RELAY
W2
Y2
S1
S2
TEMPERATURE
SENSOR
M23055
W2
Y2
S1
S2
TEMPERATURE
SENSOR
M23056
W2
Y2
S1
S2
TEMPERATURE
SENSOR
M23057
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