Honeywell CT3550 Owner's Manual - Page 21
Wiring Diagrams
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WIRING DIAGRAMS 2-WIRE HEAT-ONLY (JUMPER INTACT) THERMOSTAT B RC O W Y R G 4-WIRE HEAT/COOL (JUMPER INTACT) THERMOSTAT B RC O W Y R G HEATING RELAY OR VALVE COIL 1 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M10616 3-WIRE HEAT ONLY WITH FAN (JUMPER INTACT) THERMOSTAT B RC O W Y R G HEATING RELAY OR VALVE COIL FAN RELAY 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 1 M10618 HEATING COOLING FAN RELAY OR CONTACTOR RELAY 1 VALVE COIL COIL 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 4-WIRE SINGLE-STAGE HEAT PUMP (JUMPER INTACT) M10617 THERMOSTAT B RC O W Y R G 3 2 COMPRESSOR HEAT CHANGEOVER CONTACTOR 2 VALVE 1 COOL CHANGEOVER FAN VALVE RELAY 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 USE EITHER O OR B FOR HEAT PUMP CHANGEOVER. 3 USING A JUMPER WIRE (NOT SUPPLIED) CONNECT W TO Y. M12739 21 69-1284-2