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WIRING DIAGRAMS
THERMOSTAT
1 POWER SUPPLY.
PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
1
HEATING
RELAY OR
VALVE COIL
B
R
RC
OW Y
G
2-WIRE HEAT-ONLY
(JUMPER INTACT)
M1061
6
M1061
7
THERMOSTAT
1 POWER SUPPLY. PROVIDE
DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
1
4-WIRE HEAT/COOL
(JUMPER INTACT)
HEATING
RELAY OR
VALVE COIL
COOLING
CONTACTOR
COIL
FAN
RELAY
B
R
RC
OW Y
G
M1273
9
THERMOSTAT
4-WIRE SINGLE-STAGE HEAT PUMP
(JUMPER INTACT)
B
R
RC
OW Y
G
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
USE EITHER O OR B FOR HEAT PUMP CHANGEOVER.
USING A JUMPER WIRE (NOT SUPPLIED) CONNECT W TO Y
.
1
2
2
2
1
COMPRESSOR
CONTACTOR
COOL
CHANGEOVER
VALVE
HEAT
CHANGEOVER
VALVE
FAN
RELAY
3
3
M10618
THERMOSTAT
1 POWER SUPPLY. PROVIDE
DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
1
3-WIRE HEAT ONLY WITH FAN
(JUMPER INTACT)
HEATING
RELAY OR
VALVE COIL
FAN
RELAY
B
R
RC
OW Y
G