Honeywell CT8775A

19 69-1676—1

Contents

Main OWNERS GUIDE CT8775A,C THE DIGITAL ROUND NON-PROGRAMMABLE THERMOSTATS Contents Enjoy the benefits of The Digital RoundTM Thermostat by Honeywell. MERCURY NOTICE STEP 1. PREPARE FOR INSTALLATION Package Contents Tools for Installation STEP 2. REMOVE OLD THERMOSTAT STEP 3. SPECIAL INSTALLATIONS Replacing a thermostat that has wires connected to C or C1 terminals Replacing a thermostat that is connected to six or more wires Replacing a thermostat that is connected to three wires on a warm air heating only system STEP 4. LABEL THERMOSTAT WIRES STEP 5. SEPARATE WALLPLATE FROM THERMOSTAT STEP 6. MOUNT DECORATOR COVER PLATE AND THERMOSTAT WALLPLATE Mount Decorator Cover Plate (Optional) and Wallplate Directly to Wall Mount Decorator Cover Plate (Required) and Wallplate onto Electrical Box STEP 7. WIRE WALLPLATE TERMINALS Page STEP 8. CUSTOMIZE THE THERMOSTAT Set Fuel Switch (CT8775C Only) DIP Switch Set Heat Cycle Rate Fahrenheit/Celsius Indication STEP 9. MOUNT THE THERMOSTAT STEP 10. SET THE SYSTEM AND FAN SWITCHES (CT8775C ONLY) STEP 11. OPERATING THE THERMOSTAT Backlit Display Adjust Temperature Setting STEP 12. CHECK OPERATION OF HEATING AND/OR COOLING SYSTEM Heating System CAUTION Fan (CT8775C Only) IF YOU HAVE A PROBLEM Customer Assistance 69-16761 16 Wiring Diagrams 17 69-16761 Notice: Limited One-Year Warranty