Owner's Manual
Page 1
... DIGITAL ROUND™ NON-PROGRAMMABLE THERMOSTATS CT8775A Heat Only Thermostat (20 to 30 Vac) and CT8775C Heating-Cooling Thermostat (20 to 30 Vac) Para obtener un documento con las instrucciones en español, por favor visite nuestro sitio de web a: www.honeywell.com/yourhome. Customize the Thermostat ...10 Step 9. Mount the Thermostat ...11 Step 10. Prepare...
... DIGITAL ROUND™ NON-PROGRAMMABLE THERMOSTATS CT8775A Heat Only Thermostat (20 to 30 Vac) and CT8775C Heating-Cooling Thermostat (20 to 30 Vac) Para obtener un documento con las instrucciones en español, por favor visite nuestro sitio de web a: www.honeywell.com/yourhome. Customize the Thermostat ...10 Step 9. Mount the Thermostat ...11 Step 10. Prepare...
Owner's Manual
Page 2
...the temperature setting. • Large easy-to read display. Enjoy the benefits of the questions that contains mercury in a sealed tube, do not place your Honeywell thermostat - On-demand backlighting makes it easy to -read the display in the event of a power failure. Failure to use. COOLER WARMER ROOM SET M19582 MERCURY... instructions can arise as you become familiar and comfortable with your old control in the trash. This manual answers many of The Digital RoundTM Thermostat by Honeywell. • Simple to follow these instructions carefully. MERCURY NOTICE If this...
...the temperature setting. • Large easy-to read display. Enjoy the benefits of the questions that contains mercury in a sealed tube, do not place your Honeywell thermostat - On-demand backlighting makes it easy to -read the display in the event of a power failure. Failure to use. COOLER WARMER ROOM SET M19582 MERCURY... instructions can arise as you become familiar and comfortable with your old control in the trash. This manual answers many of The Digital RoundTM Thermostat by Honeywell. • Simple to follow these instructions carefully. MERCURY NOTICE If this...
Owner's Manual
Page 3
... zone valves (No. 1311 and 1361). PREPARE FOR INSTALLATION ❑ Check Table 1, the compatibility chart, to make sure the thermostat is not compatible, call Honeywell Customer Care, toll-free, 1-800-468-1502. System Type Gas or Oil Warm Air Electric Warm Air Gas or Oil Hot Water...Pumps/Multistage Equipment Compatibility with CT8775A Yes No Yesa Yes Yes No No No No No Compatibility with CT8775C Yes Yes Yesa Yes Yes No Yes No Yes No aCompatible with your system is compatible with 2-wire Honeywell zone valves. Package Contents • Thermostat • Wiring labels Tools...
... zone valves (No. 1311 and 1361). PREPARE FOR INSTALLATION ❑ Check Table 1, the compatibility chart, to make sure the thermostat is not compatible, call Honeywell Customer Care, toll-free, 1-800-468-1502. System Type Gas or Oil Warm Air Electric Warm Air Gas or Oil Hot Water...Pumps/Multistage Equipment Compatibility with CT8775A Yes No Yesa Yes Yes No No No No No Compatibility with CT8775C Yes Yes Yesa Yes Yes No Yes No Yes No aCompatible with your system is compatible with 2-wire Honeywell zone valves. Package Contents • Thermostat • Wiring labels Tools...
Owner's Manual
Page 4
... the furnace or the fuse/circuit breaker panel. ❑ Carefully unpack your heating and cooling systems to Step 4. STEP 2. REMOVE OLD THERMOSTAT ❑ Test your new thermostat and decorator cover plate. Save package of screws, instructions, and receipt. ❑ Remove the cover from the top or bottom, check ... when outdoor temperature is not compatible with these systems, return the product to the place of the special installations apply to your system, call Honeywell Customer Care, at 1-800-468-1502. 69-1676-1 4 If the cover does not snap off power to touch, or you have a...
... the furnace or the fuse/circuit breaker panel. ❑ Carefully unpack your heating and cooling systems to Step 4. STEP 2. REMOVE OLD THERMOSTAT ❑ Test your new thermostat and decorator cover plate. Save package of screws, instructions, and receipt. ❑ Remove the cover from the top or bottom, check ... when outdoor temperature is not compatible with these systems, return the product to the place of the special installations apply to your system, call Honeywell Customer Care, at 1-800-468-1502. 69-1676-1 4 If the cover does not snap off power to touch, or you have a...
Owner's Manual
Page 5
... a zoned hot water heating system, the CT8775A,C thermostats will work if an isolation relay is installed. For details, call your system. SEPARATE WALLPLATE FROM THERMOSTAT ❑ Remove cover from the old thermostat. Replacing a thermostat that is connected to three wires on a... warm air heating only system If you purchased a CT8775A thermostat, return the product to the place of purchase. The CT8775A thermostat is not compatible with...
... a zoned hot water heating system, the CT8775A,C thermostats will work if an isolation relay is installed. For details, call your system. SEPARATE WALLPLATE FROM THERMOSTAT ❑ Remove cover from the old thermostat. Replacing a thermostat that is connected to three wires on a... warm air heating only system If you purchased a CT8775A thermostat, return the product to the place of purchase. The CT8775A thermostat is not compatible with...
Owner's Manual
Page 8
...terminals. ❑ Plug the hole in the wall with the corresponding W terminal letter on the wires when you removed the Y old thermostat (see illustration). ❑ Match the letter of these terminals. ❑ For wiring diagrams, see illustration). FACTORY INSTALLED JUMPER M19495 ... screws. Slip each wire beneath its matching terminal. M19496 69-1676-1 8 If unsure about household wiring procedures, call your old thermostat wire with insulation to Table 2. FOR WRAPAROUND INSERTION STRIP 7/16 IN. (11 MM). WIRE WALLPLATE TERMINALS IMPORTANT All wiring must ...
...terminals. ❑ Plug the hole in the wall with the corresponding W terminal letter on the wires when you removed the Y old thermostat (see illustration). ❑ Match the letter of these terminals. ❑ For wiring diagrams, see illustration). FACTORY INSTALLED JUMPER M19495 ... screws. Slip each wire beneath its matching terminal. M19496 69-1676-1 8 If unsure about household wiring procedures, call your old thermostat wire with insulation to Table 2. FOR WRAPAROUND INSERTION STRIP 7/16 IN. (11 MM). WIRE WALLPLATE TERMINALS IMPORTANT All wiring must ...
Owner's Manual
Page 9
... in heat. (Single stage heat pump only). Tape off wire with electri- Do not connect both Rh and R terminals on the old thermostat, remove jumper between R and Rc. 3. Tape off B with electrical tape and do not use . 9 69-1676-1 Rc (see Note... 2) W Y G O B (see Note 2) Power Description - Connect O to Terminals Connect To Terminals on CT8775A on the new thermostat and connect Rh to R and R to a single stage heat pump. Terminal Designations on Old Thermostat R Rh (see Note 1) 4 V Rc R (see Note 1) W, W1, H Y, Y1, M G, F O B (see ...
... in heat. (Single stage heat pump only). Tape off wire with electri- Do not connect both Rh and R terminals on the old thermostat, remove jumper between R and Rc. 3. Tape off B with electrical tape and do not use . 9 69-1676-1 Rc (see Note... 2) W Y G O B (see Note 2) Power Description - Connect O to Terminals Connect To Terminals on CT8775A on the new thermostat and connect Rh to R and R to a single stage heat pump. Terminal Designations on Old Thermostat R Rh (see Note 1) 4 V Rc R (see Note 1) W, W1, H Y, Y1, M G, F O B (see ...
Owner's Manual
Page 10
...the wallplate (see Fig. 3). Set Heat Cycle Rate ❑ Use DIP switches 1 and 2 to set according to your particular heating system. See Table 3. NOTE: The CT8775A,C Thermostats will provide optimal temperature control if DIP switches 1 and 2 are set the heat cycle rate. Fuel switch. This is connected. CUSTOMIZE THE... Fuel Switch (CT8775C Only) ❑ To adjust the fuel switch, locate the switch labeled E/F on the back of the thermostat. The fuel switch is factory set the switch to turn on immediately with the heating system where the G terminal is the correct setting for gas...
...the wallplate (see Fig. 3). Set Heat Cycle Rate ❑ Use DIP switches 1 and 2 to set according to your particular heating system. See Table 3. NOTE: The CT8775A,C Thermostats will provide optimal temperature control if DIP switches 1 and 2 are set the heat cycle rate. Fuel switch. This is connected. CUSTOMIZE THE... Fuel Switch (CT8775C Only) ❑ To adjust the fuel switch, locate the switch labeled E/F on the back of the thermostat. The fuel switch is factory set the switch to turn on immediately with the heating system where the G terminal is the correct setting for gas...
Owner's Manual
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Temperature Indication. MOUNT THE THERMOSTAT ENGAGE TABS AT BOTTOM OF THERMOSTAT AND WALL PLATE. Heat Cycle Rate. See Table 4. Fahrenheit/Celsius Display Fahrenheit (factory setting) Celsius DIP Switch 3 Off On STEP 9. Table 3. Table 4. Heating System Cycles ...
Temperature Indication. MOUNT THE THERMOSTAT ENGAGE TABS AT BOTTOM OF THERMOSTAT AND WALL PLATE. Heat Cycle Rate. See Table 4. Fahrenheit/Celsius Display Fahrenheit (factory setting) Celsius DIP Switch 3 Off On STEP 9. Table 3. Table 4. Heating System Cycles ...
Owner's Manual
Page 12
... ON M19512 Fig. 5. Use for most homes. Fan Switch (see Fig. 5) ❑ Heat: The thermostat controls your heating system. ❑ Off: Both the heating and cooling systems are off. ❑ Cool: The thermostat controls your cooling system. CT8775 Thermostat (features and operation). 12 STEP 10. The fan only runs with the heating and...
... ON M19512 Fig. 5. Use for most homes. Fan Switch (see Fig. 5) ❑ Heat: The thermostat controls your heating system. ❑ Off: Both the heating and cooling systems are off. ❑ Cool: The thermostat controls your cooling system. CT8775 Thermostat (features and operation). 12 STEP 10. The fan only runs with the heating and...
Owner's Manual
Page 13
...the temperature setting is held permanently in the display to indicate the thermostat has called for heating. A indicator points to lower the temperature setting. ROOM SET M19490 Fig. 7. OPERATING THE THERMOSTAT NOTE: Batteries are not required because the temperature setting is displayed....10065; Turn the dial counterclockwise to lower the temperature setting below the room temperature. ❑ The flame will switch to indicate the thermostat has ended the call for heating. ROOM SET ❑ If a change to the temperature setting is displayed. The heating system ...
...the temperature setting is held permanently in the display to indicate the thermostat has called for heating. A indicator points to lower the temperature setting. ROOM SET M19490 Fig. 7. OPERATING THE THERMOSTAT NOTE: Batteries are not required because the temperature setting is displayed....10065; Turn the dial counterclockwise to lower the temperature setting below the room temperature. ❑ The flame will switch to indicate the thermostat has ended the call for heating. ROOM SET ❑ If a change to the temperature setting is displayed. The heating system ...
Owner's Manual
Page 14
.... ❑ Slide the system switch to Cool and the Fan switch to Auto. ❑ Turn the dial counterclockwise to indicate the thermostat has ended the call for cooling is made before the compressor has been off for five minutes, or if a power interruption occurs while... the compressor is below the room temperature. The snowflake will flash during this delay. ❑ After five minutes, the thermostat will disappear from the display to lower the temperature setting several degrees below 50°F (10°C). The cooling system should turn off . ...
.... ❑ Slide the system switch to Cool and the Fan switch to Auto. ❑ Turn the dial counterclockwise to indicate the thermostat has ended the call for cooling is made before the compressor has been off for five minutes, or if a power interruption occurs while... the compressor is below the room temperature. The snowflake will flash during this delay. ❑ After five minutes, the thermostat will disappear from the display to lower the temperature setting several degrees below 50°F (10°C). The cooling system should turn off . ...
Owner's Manual
Page 15
...the flame or snowflake and check the registers again. warm air, hot water, heat pump, steam or gravity). • Location and number of thermostat). • Thermostat date code. (Located below the room temperature. • Make sure the circuit breaker is not tripped, and reset it is in the Off ... in the Off position. Customer Assistance Please read and follow the provided instructions for heating. For additional information, go to www.honeywell.com/yourhome or call Honeywell Customer Care, toll free, at the equipment is no warm or cool air is in the On position, and set the...
...the flame or snowflake and check the registers again. warm air, hot water, heat pump, steam or gravity). • Location and number of thermostat). • Thermostat date code. (Located below the room temperature. • Make sure the circuit breaker is not tripped, and reset it is in the Off ... in the Off position. Customer Assistance Please read and follow the provided instructions for heating. For additional information, go to www.honeywell.com/yourhome or call Honeywell Customer Care, toll free, at the equipment is no warm or cool air is in the On position, and set the...
Owner's Manual
Page 17
...) TO CONNECT W TO Y. 4 USE EITHER O OR B FOR HEAT PUMP CHANGEOVER. O B Rc 2 G R Y W COMPRESSOR CONTACTOR HEATING 1 RELAY OR VALVE COIL FAN RELAY 1 1 POWER SUPPLY. M19454 Notice: This thermostat is a Class B digital apparatus that complies with Canadian Radio Interference Regulations, CRC c. 1374. 17 69-1676-1 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 FACTORY...
...) TO CONNECT W TO Y. 4 USE EITHER O OR B FOR HEAT PUMP CHANGEOVER. O B Rc 2 G R Y W COMPRESSOR CONTACTOR HEATING 1 RELAY OR VALVE COIL FAN RELAY 1 1 POWER SUPPLY. M19454 Notice: This thermostat is a Class B digital apparatus that complies with Canadian Radio Interference Regulations, CRC c. 1374. 17 69-1676-1 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 FACTORY...
