Honeywell TB7220 Product Data page 7

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. 12. 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
HEAT RELAY
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. 13. Typical hookup of dual transformer 1H/1C system.
3
C W2
Y2
G
Y
S1
W
S2
RC
2
R
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
M24016
3
C W2
G Y2
Y
S1
W
S2
RC
2
R
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
M24017
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
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. 14. Typical hookup of heat-only system.
1
L1
(HOT)
24 VAC
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. 15. Typical hookup of cool-only system.
7
3
W2
C
G Y2
Y
W S1
RC S2
2
R
OUTDOOR/INDOOR
HEAT RELAY
TEMPERATURE
SENSOR
3
C W2
G Y2
Y
S1
W
S2
RC
2
R
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
FAN RELAY
M24018
M24019
63-2636—03