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Honeywell CT8775A - page 1
OWNER’S GUIDE ® U.S. Registered T rademark • Patent s Pending Copyright © 2004 Honeywell Internat ional Inc. All Rights Reserved 69-1676—1 CT8775A,C THE DIGITAL ROUND ™ NON-PROGRAMMABLE THERMOSTATS CT8775A Heat Only Thermostat (20 to 30 V ac) and CT8775C Heating-Cooling Thermo stat (20 to 30 V ac) Para obtener un documento con las instru ...
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Honeywell CT8775A - page 2
69-1676—1 2 Enjoy the benefits of The Digit al Round TM Thermostat by Honeywell. • Simple to use. T urn the dial to adjust the temper ature 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 display in a dark room or hallway . ? ...
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Honeywell CT8775A - page 3
3 69-1676—1 STEP 1. PREPARE FOR INSTALLATION ❑ Check T able 1, the compatibility chart, to make sure t he t hermostat is compatible with your system. If your system is not compatible, call Honeywell Customer Care, toll-free, 1-800-468-1502. T able 1. Compatibility Chart. a Compatible with 2-wire Honeywell zone valves. Not compatib le with T aco ...
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Honeywell CT8775A - page 4
69-1676—1 4 STEP 2. REMOVE OLD THERMOSTAT ❑ T est your heating and cooling systems to make sure they work properly . If either system does not wor k, contact your local heating/air-conditioning dealer . T o avoid compressor damage, do not o perate the cooling system when outdoor temperature is below 50°F (10°C). ❑ T urn off power to the sys ...
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Honeywell CT8775A - page 5
5 69-1676—1 Replacing a thermostat that is connected to three wires on a warm air heating only system If you are replacing a thermostat that is connected to thr ee wires on a warm air heating only system and could turn the fan on by setting the thermostat fan switch to ON, the CT8775C Thermostat will work with your system. Continue with the insta ...
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Honeywell CT8775A - page 6
69-1676—1 6 Mount Decorator Cover Pl ate (Optional) and Wall plate Directly to Wall ❑ If using the decorator cover plate, pull the wires through the wiring hole on the decorator co ver plate. Position the decorator cover plate against the wall so that the UP indicator in the middle of the decorator cover plate is pointing up. ❑ Position the w ...
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Honeywell CT8775A - page 7
7 69-1676—1 . Mount Decorator Cover Plat e (Required) and Wallpl ate onto Electrical Box ❑ Pull the wires through the wiring hole on the decorator cover plate. ❑ Place the decorator cover pl ate against the electrical box so that the UP indicator in the middle of the decorator cover plate is pointing up. ❑ Line up the screw slots on the dec ...
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Honeywell CT8775A - page 8
69-1676—1 8 STEP 7. WIRE WALLPLATE TERMINALS IMPORTANT All wiring must comply with local codes and ordinances. If unsure about household wiring pr ocedures, call your local heating/air conditioning contractor. ❑ Refer to the labels you placed on the wires wh en you removed the old thermostat (see illustration). ❑ Match the letter of your old ...
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Honeywell CT8775A - page 9
9 69-1676—1 T able 2. T erminal Designatio ns on Old and New Thermostats. NOTES: 1. If wires were connected to both Rh and R terminals on the old thermostat, remove jumper betwe en R and Rc on the new thermostat and connect Rh to R and R to Rc. 2. If wires will be connected to both R and Rc on the new thermostat, remove jumper between R and Rc. 3 ...
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Honeywell CT8775A - page 10
69-1676—1 10 STEP 8. CUSTOMIZE THE THERMOSTAT Set Fuel Switch (CT8775C Only) ❑ T o adjust the fuel sw itch, 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 syste ms. If you have an electric h eat system, or a heat pump, set the switch to E. ...
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Honeywell CT8775A - page 11
1 1 69-1676—1 T able 3. Heat Cycle R ate. NOTE: The cooling cycle rate does not requi re adjustment and therefore cannot be changed. Fahrenheit/Celsius Indication ❑ Use DIP switch 3 to set the desired temperature indication. See T able 4. T able 4. T emperature Indicatio n. STEP 9. MOUNT THE THERMOSTAT Heating System Cycles Per Hour DIP Switch ...
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Honeywell CT8775A - page 12
69-1676—1 12 STEP 10. SET THE SYSTEM AND F AN SWITCHES (CT8775C ONLY) System 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. Fan Switch (see Fig. 5) ❑ Fan Auto: Normal setting for most homes. The f an only run ...
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Honeywell CT8775A - page 13
13 69-1676—1 STEP 11. OPERATING THE THERMOSTAT NOTE: Batteries are not required because the tem peratu re setting is held permanently in memory . Backlit Display ❑ The backlight can be turned on by turning the di al, or pushing the backlight button (see Fig. 5). Adjust Temperat ure Setting ❑ T urn the dial clockwise to raise the temperature s ...
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Honeywell CT8775A - page 14
69-1676—1 14 Cooling System (CT8775C Only) CAUTION Equipment Damage Hazard . Can cause permane nt damage to compressor o r other equipment. Do not operate cooling when outsid e temperature is below 50°F (10°C). Allow compressor to remain off for five minutes before restarting. See equipment manufacturer instruction s. ❑ Slide the system switc ...
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Honeywell CT8775A - page 15
15 69-1676—1 IF YOU HAVE A PROBLEM T able 5. Solution Guid e. Customer Assistance Please read and follow the provided instructions for this the rmostat. For additional information, go to www .honeywell.com/yo urhome or call Honeywell Customer Care, toll free, at 1-800-468-1502. Before calling, please have the following information available : • ...
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Honeywell CT8775A - page 16
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 2 W R Rc B O Y G 1 HEATING RELAY OR VALVE COIL ...
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Honeywell CT8775A - page 17
17 69-1676—1 Notice: This thermostat is a Class B digita l app aratus that complies with C anadian R adio Interference Regulations, CRC c. 1374. 1 4 COMPRESSOR CONTACTOR HEAT CHANGEOVER VALVE COOL CHANGEOVER VALVE FAN RELAY M19453 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 FACTORY INSTALLED JUMPER. 3 USE A JUM ...
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Honeywell CT8775A - page 18
69-1676—1 18 Limited One-Year Warranty Honeywell warrants th is product to be free from defects in the workmanship o r materials, under normal use an d service, for a pe riod of one (1) year from the date of purcha se by the consumer . If, at any time during the warranty per iod, the pr oduct is defective or malfunctions, Honeywell shall repair o ...
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Honeywell CT8775A - page 19
19 69-1676—1 ...
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Honeywell CT8775A - page 20
69-1676—1 J.S. Rev . 6-04 www .honeywell.com/yourhome Automation and Control Solutio ns Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 5 5422 Scarborough, Ontario M1V 4Z9 ...
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