14
5.4 Typical wiring diagrams
Typical wiring diagram for heat only,
3-wire, single transformer systems
RH
24 VAC
120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G
W
TRANSFORMER
Heating
System
Fan
Relay
Y
C‡
RC
JUMPER
WIRE
O
B
For 2-wire Heat only,
attach to RH and W
NOTE
Typical wiring diagram for cool only,
3-wire, single transformer systems
RH
Y
24 VAC
120 VAC
Hot
Neutral
TRANSFORMER
THERMOSTAT
SYSTEM
G
W
Cooling
System
Fan
Relay
RC
O
B
C‡
JUMPER
WIRE
Typical wiring diagram for heat/cool,
4-wire, single transformer systems
RH
Y
24 VAC
120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G
W
TRANSFORMER
Heating
System
Fan
Relay
Cooling
System
RC
JUMPER
WIRE
O
C‡
B
RED jumper wire (provided with thermostat) must be
connected between thermostat RH and RC terminals
for proper thermostat operation with this system.
NOTE
Typical wiring diagram for heat/cool,
5-wire, two-transformer systems
RH
Y
24 VAC
120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G
W
HEATING
TRANSFORMER
Heating
System
Fan
Relay
Cooling
System
RC
24 VAC
120 VAC
Hot
Neutral
COOLING TRANSFORMER
O
B
C‡
Typical wiring diagram for heat pump
with reversing valve energized in COOL
RH
Y
24 VAC
120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G
W
TRANSFORMER
Reversing
Valve*
RC
O
B
C‡
JUMPER
WIRE
Compressor
Contactor
JUMPER
WIRE
* Reversing valve is energized when the
system switch is in the COOL position
Fan
Relay
Typical wiring diagram for heat pump
with reversing valve energized in HEAT
RH
Y
24 VAC
120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G
W
TRANSFORMER
Reversing
Valve*
RC
O
B
C‡
JUMPER
WIRE
Compressor
Contactor
JUMPER
WIRE
* Reversing valve is energized when the
system switch is in the HEAT position
Fan
Relay
Typical wiring diagram for heat only,
3-wire, single transformer systems
RH
24 VAC
120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G
W
TRANSFORMER
Heating
System
Fan
Relay
Y
C‡
RC
JUMPER
WIRE
O
B
For 2-wire Heat only,
attach to RH and W
NOTE
Typical wiring diagram for cool only,
3-wire, single transformer systems
RH
Y
24 VAC
120 VAC
Hot
Neutral
TRANSFORMER
THERMOSTAT
SYSTEM
G
W
Cooling
System
Fan
Relay
RC
O
B
C‡
JUMPER
WIRE
Typical wiring diagram for heat/cool,
4-wire, single transformer systems
RH
Y
24 VAC
120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G
W
TRANSFORMER
Heating
System
Fan
Relay
Cooling
System
RC
JUMPER
WIRE
O
C‡
B
RED jumper wire (provided with thermostat) must be
connected between thermostat RH and RC terminals
for proper thermostat operation with this system.
NOTE
Typical wiring diagram for heat/cool,
5-wire, two-transformer systems
RH
Y
24 VAC
120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G
W
HEATING
TRANSFORMER
Heating
System
Fan
Relay
Cooling
System
RC
24 VAC
120 VAC
Hot
Neutral
COOLING TRANSFORMER
O
B
C‡
Typical wiring diagram for heat pump
with reversing valve energized in COOL
RH
Y
24 VAC
120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G
W
TRANSFORMER
Reversing
Valve*
RC
O
B
C‡
JUMPER
WIRE
Compressor
Contactor
JUMPER
WIRE
* Reversing valve is energized when the
system switch is in the COOL position
Fan
Relay
Typical wiring diagram for heat pump
with reversing valve energized in HEAT
RH
Y
24 VAC
120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G
W
TRANSFORMER
Reversing
Valve*
RC
O
B
C‡
JUMPER
WIRE
Compressor
Contactor
JUMPER
WIRE
* Reversing valve is energized when the
system switch is in the HEAT position
Fan
Relay
Содержание White-Rodgers P210
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