Honeywell TH8320U Installation Instructions Manual page 3

Y2 RC
R
W
W2 Y
S1
G
S2 C
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
3 OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
Fig. 5. Typical hookup of conventional single-stage
heat and cool system with single transformer
(1H/1C conventional).
RC
Y2
R
W
W2 Y
S1
G
S2 C
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
REMOVE FACTORY INSTALLED JUMPER.
3 OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
Fig. 6. Typical hookup of conventional single-stage
heat and cool system with two transformers
(1H/1C conventional).
TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
CONVENTIONAL
2
OPTIONAL
24 VAC
COMMON
CONNECTION
FAN
RELAY
COMPRESSOR
CONTACTOR
HEAT RELAY
CONVENTIONAL
2
OPTIONAL
24 VAC
COMMON
CONNECTION
FAN
RELAY
COMPRESSOR
CONTACTOR
HEAT RELAY
Y2
1
R
W2
C
S1
S2
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
3 OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
M19895
Fig. 7. Typical hookup of heat-only system
Y2
W2
S1
1
S2
R
C
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
1
2
FACTORY INSTALLED JUMPER.
C
3 OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
R
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
Fig. 8. Typical hookup of heat only system with fan
M19896
3
CONVENTIONAL
RC
2
R
W
Y
G
OPTIONAL
C
24 VAC
COMMON
CONNECTION
HEAT RELAY
(1H conventional).
CONVENTIONAL
RC
2
R
W
Y
G
OPTIONAL
C
24 VAC
COMMON
CONNECTION
FAN
RELAY
HEAT RELAY
(1H conventional).
1
R
C
M19897
1
R
C
M19898
69-1706