Honeywell CT3550 - Manual (Page 21)

21 69-1284—2
WIRING DIAGRAMS
THERMOSTAT
1 POWER SUPPLY.
PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
1
HEATING
RELAY OR
VALVE COIL
B
R
RC O W Y
G
2-WIRE HEAT-ONLY
(JUMPER INTACT)
M10616
M10617
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 O W Y
G
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 O W Y
G
M12739
THERMOSTAT
4-WIRE SINGLE-STAGE HEAT PUMP
(JUMPER INTACT)
B
R
RC O W 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