Conventional System Wiring - Honeywell TB7220U CommercialPRO Installation Instructions Manual

TB7220U COMMERCIALPRO™ 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.
62-0221—05
3
W2
C
G Y2
A
Y
S1
W
S2
RC
2
R
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
ECONOMIZER
3
W2
C
G Y2
A
Y
W S1
S2
RC
2
R
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
ECONOMIZER
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.
M23011
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
L2
M23012
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
ECONOMIZER
3
C
G
Y
W
RC
2
R
HEAT RELAY
OUTDOOR/INDOOR
FAN RELAY
ECONOMIZER
3
C
G
Y
W
RC
2
R
OUTDOOR/INDOOR
FAN RELAY
ECONOMIZER
W2
Y2
A
S1
S2
TEMPERATURE
SENSOR
M23013
W2
Y2
A
S1
S2
TEMPERATURE
SENSOR
M23014
W2
Y2
A
S1
S2
TEMPERATURE
SENSOR
M23015