Honeywell CT8775A- Manual

Page 2 - Enjoy the benefits of The Digital Round; TM; Thermostat by Honeywell.; MERCURY NOTICE

69-1676—1 2 Enjoy the benefits of The Digital Round TM Thermostat by Honeywell. • Simple to use. Turn the dial to adjust the temperature setting. • Large easy-to-read display. The temperature reading is easily seen from a distance. • Backlit display. On-demand backlighting makes it easy to read the ...

Page 3 - STEP 1. PREPARE FOR INSTALLATION; Package Contents; System Type

3 69-1676—1 STEP 1. PREPARE FOR INSTALLATION ❑ Check Table 1, the compatibility chart, to make sure the thermostat is compatible with your system. If your system is not compatible, call Honeywell Customer Care, toll-free, 1-800-468-1502. Table 1. Compatibility Chart. a Compatible with 2-wire Honeywe...

Page 4 - STEP 2. REMOVE OLD THERMOSTAT; Do not; STEP 3. SPECIAL INSTALLATIONS; Replacing a thermostat that is connected to six or more wires

69-1676—1 4 STEP 2. REMOVE OLD THERMOSTAT ❑ Test your heating and cooling systems to make sure they work properly. If either system does not work, contact your local heating/air-conditioning dealer. To avoid compressor damage, do not operate the cooling system when outdoor temperature is below 50°F ...

Page 6 - wallplate directly to wall (heating-cooling wallplate

69-1676—1 6 Mount Decorator Cover Plate (Optional) and Wallplate Directly to Wall ❑ If using the decorator cover plate, pull the wires through the wiring hole on the decorator cover plate. Position the decorator cover plate against the wall so that the UP indicator in the middle of the decorator cov...

Page 7 - wallplate onto electrical box (heating-cooling wallplate

7 69-1676—1 . Mount Decorator Cover Plate (Required) and Wallplate onto Electrical Box ❑ Pull the wires through the wiring hole on the decorator cover plate. ❑ Place the decorator cover plate against the electrical box so that the UP indicator in the middle of the decorator cover plate is pointing u...

Page 8 - STEP 7. WIRE WALLPLATE TERMINALS

69-1676—1 8 STEP 7. WIRE WALLPLATE TERMINALS IMPORTANT All wiring must comply with local codes and ordinances. If unsure about household wiring procedures, call your local heating/air conditioning contractor. ❑ Refer to the labels you placed on the wires when you removed the old thermostat (see illu...

Page 10 - STEP 8. CUSTOMIZE THE THERMOSTAT; DIP Switch

69-1676—1 10 STEP 8. CUSTOMIZE THE THERMOSTAT Set Fuel Switch (CT8775C Only) ❑ To adjust the fuel switch, locate the switch labeled E/F on the wallplate (see Fig. 3). The fuel switch is factory set in the F position. This is the correct setting for gas or oil systems. If you have an electric heat sy...

Page 11 - Fahrenheit/Celsius Indication; STEP 9. MOUNT THE THERMOSTAT; Heating System

11 69-1676—1 Table 3. Heat Cycle Rate. NOTE: The cooling cycle rate does not require adjustment and therefore cannot be changed. Fahrenheit/Celsius Indication ❑ Use DIP switch 3 to set the desired temperature indication. See Table 4. Table 4. Temperature Indication. STEP 9. MOUNT THE THERMOSTAT Heat...

Page 13 - STEP 11. OPERATING THE THERMOSTAT; Backlit Display; STEP 12. CHECK OPERATION OF HEATING AND/OR COOLING SYSTEM

13 69-1676—1 STEP 11. OPERATING THE THERMOSTAT NOTE: Batteries are not required because the temperature setting is held permanently in memory. Backlit Display ❑ The backlight can be turned on by turning the dial, or pushing the backlight button (see Fig. 5). Adjust Temperature Setting ❑ Turn the dia...

Page 14 - CAUTION; Equipment Damage Hazard.; Do not operate cooling when outside temperature is below 50°F (10°C).

69-1676—1 14 Cooling System (CT8775C Only) CAUTION Equipment Damage Hazard. Can cause permanent damage to compressor or other equipment. Do not operate cooling when outside temperature is below 50°F (10°C). Allow compressor to remain off for five minutes before restarting. See equipment manufacturer...

Page 15 - IF YOU HAVE A PROBLEM; Customer Assistance; Then...

15 69-1676—1 IF YOU HAVE A PROBLEM Table 5. Solution Guide. Customer Assistance Please read and follow the provided instructions for this thermostat. For additional information, go to www.honeywell.com/yourhome or call Honeywell Customer Care, toll free, at 1-800-468-1502. Before calling, please hav...

Page 16 - Wiring Diagrams

69-1676—1 16 Wiring Diagrams POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. W R HEATING RELAY OR VALVE COIL M19450 1 1 M19451 HEATING RELAY OR VALVE COIL FAN RELAY 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 FACTORY INSTALLED JUMPER. 1...

Page 18 - Limited One-Year Warranty

69-1676—1 18 Limited One-Year Warranty Honeywell warrants this product to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the product is defective o...

Page 20 - Automation and Control Solutions

69-1676—1 J.S. Rev. 6-04 www.honeywell.com/yourhome Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, OntarioM1V 4Z9

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