Honeywell Heat/1Cool User Guide - Page 80
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IMPORTANT: DISCONNECT POWER SUPPLY BEFORE BEGINNING WIRING. STEP ATTACH BOTH WIRES (FORMER 4 VR AND V) TO REPLACEMENT THERMOSTAT R TERMINAL STEP 3 TIE FORMER OUTSIDE TRANSFORMER COMMON TO NEW TRANSORMER COMMON YELLOW XX STEP REMOVE FORMER 1 OUTSIDE TRANSFORMER TAPE OFF INDOOR BLOWER RELAY COMPRESSOR CONTACTOR DEFROST CONTROL RELAY FORMER REPLACEMENT THERMOSTAT/ SUBBASE V F G M Y (Y1 + W1) DEFROST RELAY REVERSING VALVE EMERGENCY HEAT RELAY 3 HEAT RELAY NO. 1 SERVICE LIGHT THERMOSTAT THERMISTOR OUTDOOR THERMOSTAT R O DEFROST RELAY E E X X Y W2 L L (X1) 1 TAPE OFF X X2 A VR R HEAT RELAY NO. 2 HEAT RELAY NO. 1 (AUX) EMERGENCY HEAT RELAY STEP REPLACE FORMER INDOOR 2 TRANSFORMER WITH NEW 75VA AT88A1021 OR AT175A1008 1 RELAY REQUIRED TO OPERATE SYSTEM MONITOR LIGHT ON TRADELINE THERMOSTATS. TAPE OFF IF NOT DESIRED. M958B 70-6627 • 78
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