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TB7220 COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
7 63-2635—03
Conventional System Wiring
Fig. 12. Typical wiring of single transformer 1H/1C system.
Fig. 13. Typical hookup of dual transformer 1H/1C system.
Fig. 14. Typical hookup of heat-only system.
Fig. 15. Typical hookup of cool-only system.
COMPRESSOR CONTACTOR
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
HEAT RELAY
ECONOMIZER
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
2
3
C
G
Y
W
RC
R
W2
Y2
A
S1
S2
2
3
L1
(HOT)
L2
1
24 VAC
M23011
COMPRESSOR CONTACTOR
M23012
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
HEAT RELAY
FAN RELAY
COOLING
TRANSFORMER
HEATING
TRANSFORMER
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
ECONOMIZER
L1
(HOT)
L2
1
24 VAC
L1
(HOT)
L2
1
24 VAC
C
G
Y
W
RC
R
W2
Y2
A
S1
S2
2
M23013
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
HEAT 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
L1
(HOT)
L2
1
24 VAC
ECONOMIZER
C
G
Y
W
RC
R
W2
Y2
A
S1
S2
2
M23015
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
COMPRESSOR CONTACTOR
L1
(HOT)
L2
1
24 VAC
ECONOMIZER
C
G
Y
W
RC
R
W2
Y2
A
S1
S2
2