User manual HONEYWELL CT8775C

THE DIGITAL ROUNDTM NON-PROGRAMMABLE THERMOSTATS OWNER'S GUIDE CT8775A,C 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. Pour obtenir des notices techniques en français, veuillez consulter notre site web www.honeywell.com/yourhome. Contents Step 1. Prepare for Installation ................................................................................................................................... 3 Step 2. Remove Old Thermostat ................................................................................................................................ 4 Step 3. Special Installations......................................................................................................................................... 4 Step 4. Label Thermostat Wires .................................................................................................................................. 5 Step 5. Separate Wallplate from Thermostat............................................................................................................... 5 Step 6. Mount Decorator Cover Plate and Thermostat Wallplate................................................................................ 5 Step 7. Wire Wallplate Terminals................................................................................................................................. 8 Step 8. Customize the Thermostat .............................................................................................................................. 10 Step 9. Mount the Thermostat ..................................................................................................................................... 11 Step 10. Set the System and Fan Switches ................................................................................................................ 12 Step 11. Operating the Thermostat.............................................................................................................................. 13 Step 12. Check Operation of Heating and/or Cooling System .................................................................................... 13 If You Have A Problem ................................................................................................................................................ 15 Wiring Diagrams.......................................................................................................................................................... 16 ® U.S. Registered Trademark Copyright © 2003 Honeywell International Inc. · · All Rights Reserved 69-1676 Enjoy the benefits of The Digital RoundTM 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 display in a dark room or hallway. No batteries required. The temperature setting is held permanently in memory in the event of a power failure. CO O LE R WAR ME R ROOM SET This manual answers many of the questions that can arise as you become familiar and comfortable with your Honeywell thermostat -- the state of the art in home comfort controls. Read these instructions carefully. Failure to follow these instructions can damage the product or cause a hazardous condition. M19582 If this thermostat is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash. Contact your local waste management authority for instructions regarding recycling and the proper disposal of an old control containing mercury in a sealed tube. MERCURY NOTICE MERCURY SWITCH TYPICAL LOCATION OF A MERCURY SWITCH IN A THERMOSTAT M10614 69-1676 2 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. System Type Gas or Oil Warm Air Electric Warm Air Gas or Oil Hot Water Gas or Oil Steam Gas or Oil Gravity Gas Millivolt Electric Air Conditioning Baseboard Electric (120/240 line volt) Single Stage Heat Pump Multistage Heat Pumps/Multistage Equipment a b 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 Compatible with 2-wire Honeywell zone valves. Not compatible with Taco zone valves and 2- or 3-wire WhiteRodgers zone valves (No. 1311 and 1361). b Not compatible with any 120/240 volt system. Package Contents · · · · Thermostat Wiring labels Screwdriver Needle nose pliers · · · · Decorator cover plate Owner's Guide Drill Drill bits (3/16 in. drywall, 7/32 in. plaster) 3 · Screws and wall anchors Tools for Installation · Hammer 69-1676 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 (10°C). Turn off power to the system at the furnace or the fuse/circuit breaker panel. Carefully unpack your new thermostat and decorator cover plate. Save package of screws, instructions, and receipt. Remove the cover from the old thermostat. If the cover does not snap off when pulled firmly from the top or bottom, check for a screw or screws that may be used to lock on the cover. Loosen the screw or screws (if present) holding the thermostat to the wallplate and lift the thermostat away. Do not disconnect wires. STEP 3. SPECIAL INSTALLATIONS Read this section if you are replacing: · A thermostat that has wires connected to C or C1 terminals. · A thermostat that is connected to six or more wires. · A thermostat that is connected to three wires on a warm air heating only system. · A thermostat that is connected to three wires on a zoned hot water heating system. NOTE: If none of the special installations apply to your particular application, please skip to Step 4. Replacing a thermostat that has wires connected to C or C1 terminals If you are replacing a thermostat that has one or two wires connected to C or C1 terminals, do not allow them to touch, or you can damage the transformer. Wrap the wires separately using electrical tape. Place the wires where they will not interfere with the operation of the new thermostat. Continue with the installation at Step 4. Replacing a thermostat that is connected to six or more wires If you are replacing a thermostat that is connected to six or more wires (excluding wires connected to C or C1 terminals), you may have a multistage heat pump or other multistage system. If you have either one of these systems, return the product to the place of purchase. This thermostat is not compatible with these systems. For information about which thermostats will work with your system, call Honeywell Customer Care, at 1-800-468-1502. 69-1676 4 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 three 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 installation at Step 4. If you purchased a CT8775A thermostat, return the product to the place of purchase. The CT8775A thermostat is not compatible with this application. Replacing a thermostat that is connected to three wires on a zoned hot water heating system If you are replacing a thermostat that is connected to three wires on a zoned hot water heating system, the CT8775A,C thermostats will only work if an isolation relay is installed. For details, call your local heating and/or cooling contractor. STEP 4. LABEL THERMOSTAT WIRES Disconnect the wires from the old thermostat. As you disconnect each wire, attach the enclosed labels with the old terminal designation. Wrap the wires around a pencil as shown to keep them from falling back into the wall. WIRES THROUGH WALL OPENING STEP 5. SEPARATE WALLPLATE FROM THERMOSTAT Remove cover from thermostat. Separate the wallplate from the thermostat by placing your thumb on the top between the wallplate and the thermostat and pulling the thermostat away from the wallplate. See the illustration at the right. M5136 COVER REMOVED THERMOSTAT WALL PLATE STEP 6. MOUNT DECORATOR COVER PLATE AND THERMOSTAT WALLPLATE The decorator cover plate and wallplate can be mounted directly on the wall or onto an electrical box. To mount directly to the wall, see Fig. 1. To mount onto an electrical box, see Fig. 2. 5 M19492 69-1676 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 WALL ANCHORS (2) decorator cover plate against the wall so that the UP DECORATOR COVER PLATE indicator in the middle of the decorator cover plate is pointing up. Position the wallplate: If using the decorator cover plate, pull the wires WALL PLATE through the wiring hole on the wallplate and place the wallplate over the decorator cover plate. Turn 1 INCH SCREW (2) the wallplate until the wiring holes are aligned and the two screw holes on the left and right side of the wallplate line up with the screw holes on the decorator cover plate. You will be inserting the screws through these holes into the wall. If attaching the wallplate directly to the wall, pull the wires through the wiring hole on the wallplate and position it so that the UP indicator on the wallplate is M19493 pointing up. WIRING HOLES Use a pencil to mark the center of the screw holes on the left and right sides of the wallplate. Fig. 1. Mount decorator cover plate (optional) and Remove the wallplate and decorator cover plate (if used) wallplate directly to wall (heating-cooling wallplate and drill two 3/16 in. holes in the wall (if drywall) at the shown). locations you marked. For materials such as plaster, drill 7/32 in. holes where marked. Gently tap the provided anchors into the drilled holes until they are flush with the wall. Pull the wires through the wiring holes and reposition the decorator cover plate (if used) and wallplate over the screw holes. Attach the decorator cover plate (if used) and wallplate to the wall with two 1-in. screws. 69-1676 6 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 up. Line up the screw slots on the decorator cover plate with the electrical box screw holes, and attach the decorator cover plate to the electrical box with two 1/2 in. screws. Pull the wires through the wiring hole on the wallplate. Place the wallplate over the decorator cover plate. Turn the wallplate until the wiring holes are aligned and the two screw holes on the left and right side of the wallplate line up with the screw holes on the decorator cover plate. Attach the wallplate to the decorator cover plate with the two 3/8 in. screws. ELECTRICAL BOX DECORATOR COVER PLATE 1/2 INCH SCREW (2) WALL PLATE 3/8 INCH SCREW (2) A 1 1 IF ELECTRICAL BOX IS HORIZONTAL, MOUNT DECORATOR COVER PLATE IN POSITION SHOWN, BUT FASTEN WITH SCREWS THROUGH "A". M19494 WIRING HOLES Fig. 2. Mount decorator cover plate (required) and wallplate onto electrical box (heating-cooling wallplate shown). 7 69-1676 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 illustration). Match the letter of your old thermostat wire with the corresponding terminal letter on your new thermostat. Refer to Table 2. IMPORTANT Remove the factory-installed jumper connecting terminals R and Rc on the CT8775C Thermostat if wires will be connected to both of these terminals. For wiring diagrams, see pp 16-17. Loosen the terminal screws. Slip each wire beneath its matching terminal. Wraparound and straight connections are both acceptable, (see illustration). Tighten the terminals. Plug the hole in the wall with insulation to help prevent drafts from adversely affecting thermostat operation. R G Y W FACTORY INSTALLED JUMPER M19495 FOR STRAIGHT INSERTION STRIP 5/16 IN. (8 MM). FOR WRAPAROUND INSERTION STRIP 7/16 IN. (11 MM). M19496 69-1676 8 Table 2. Terminal Designations on Old and New Thermostats. Terminal 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 Note 3) C (see Note 4) X (see Note 4) B (see Note 3) W2, H2 Y2 Connect to Terminals on CT8775A R Connect To Terminals on CT8775C R (see Note 2) Power Description -- W -- -- -- -- Do not connect. Rc (see Note 2) W Y G O B (see Note 3) Do not connect. Power for cooling Heat Cooling Fan Changeover in cool. (Single stage heat pump only). Changeover in heat. (Single stage heat pump only). Transformer common Do not continue installation. Call 1-800468-1502. Do not continue installation. Call 1-800468-1502. Second stage heat. Second stage cool. NOTES: 1. If wires were connected to both Rh and R terminals on the old thermostat, remove jumper between 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. Do not connect both O and B when wiring to a single stage heat pump. Connect O to O. Tape off B with electrical tape and do not use. 4. Tape off wire with electrical tape and do not use. 9 69-1676 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 system, or a heat pump, set the switch to E. The E setting allows the fan to turn on immediately with the heating system where the G terminal is connected. DIP Switch To adjust the heat cycle rate or the Fahrenheit/Celsius indication, locate DIP switch 1, 2 and 3 on the back of the thermostat. See Fig. 4. FUEL SWITCH M19497 Set Heat Cycle Rate Use DIP switches 1 and 2 to set the heat cycle rate. See Table 3. NOTE: The CT8775A,C Thermostats will provide optimal temperature control if DIP switches 1 and 2 are set according to your particular heating system. Fig. 3. Fuel switch. ON 123 DIP SWITCH M19567 Fig. 4. DIP switch. 69-1676 10 Table 3. Heat Cycle Rate. Heating System Steam, Gravity Gas or Oil Warm Air (factory setting) Electric Warm Air In Floor Radiant Heat NOTE: Cycles Per Hour DIP Switch 1 DIP Switch 2 1 6 9 On Off Off On On On Off Off High Efficiency Warm Air (90%+ efficiency), Hot Water, Heat Pump 3 Check with manufacturer for recommended cycle rate. 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. Fahrenheit/Celsius Display Fahrenheit (factory setting) Celsius DIP Switch 3 Off On STEP 9. MOUNT THE THERMOSTAT ENGAGE TABS AT BOTTOM OF THERMOSTAT AND WALL PLATE. PRESS UPPER EDGE OF CASE TO LATCH M19498 11 69-1676 STEP 10. SET THE SYSTEM AND FAN 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 fan only runs with the heating and cooling system. Fan On: The fan runs continuously. Use for improved air circulation. (CT8775C ONLY) SELECTS COOL/OFF/HEAT (CT8775C ONLY) SELECTS ON/AUTO ROOM SET SHOWS THAT THE CURRENT ROOM TEMPERATURE IS DISPLAYED DISPLAYS ROOM OR SET TEMPERATURE SHOWS THAT THE CURRENT TEMPERATURE SETTING IS DISPLAYED DISPLAYS AND ADJUSTS TEMPERATURE SETTING/ TURNS BACKLIGHT ON M19512 Fig. 5. CT8775 Thermostat (features and operation). 69-1676 12 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). Display Temperature Setting Turn the dial one click to display the temperature setting (see Fig. 6). A indicator points to Set when the temperature setting is displayed. ROOM SET Fig. 6. Temperature Setting Display. M19489 If a change to the temperature setting is not made within five seconds, the mode will switch to the room temperature display (see Fig. 7). A indicator points to Room when the room temperature is displayed. ROOM SET M19490 Fig. 7. Room Temperature Display. Adjust Temperature Setting Turn the dial clockwise to raise the temperature setting. Turn the dial counterclockwise to lower the temperature setting. STEP 12. CHECK OPERATION OF HEATING AND/OR COOLING SYSTEM Heating System Slide the system switch to Heat and the Fan switch to Auto (CT8775C only). Turn the dial clockwise to raise the temperature setting several degrees above the room temperature. A flame will appear in the display to indicate the thermostat has called for heating. The heating system should turn on. Turn the dial counterclockwise to lower the temperature setting below the room temperature. The flame will disappear from the display to indicate the thermostat has ended the call for heating. The heating system should turn off. 13 69-1676 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 instructions. Slide the system switch to Cool and the Fan switch to Auto. Turn the dial counterclockwise to lower the temperature setting several degrees below the room temperature. NOTE: If a call for cooling is made before the compressor has been off for five minutes, or if a power interruption occurs while the compressor is running, the thermostat will go into a five-minute delay to protect the compressor. The snowflake will flash during this delay. After five minutes, the thermostat will display a solid snowflake to indicate the thermostat has called for cooling. The cooling system should turn on. Turn the dial clockwise to raise the temperature setting above the room temperature. The snowflake will disappear from the display to indicate the thermostat has ended the call for cooling. The cooling system should turn off. Fan (CT8775C Only) Slide the system switch to Off and the fan switch to On. The fan should run continuously. Slide the Fan switch to Auto. The fan should turn off. 69-1676 14 IF YOU HAVE A PROBLEM Table 5. Solution Guide. Then... Make sure the thermostat is wired correctly. Refer to Table 2 or the wiring diagrams. · Make sure the thermostat is mounted and latched on the wallplate. · Make sure the circuit breaker is not tripped, and reset it if necessary. · Make sure the power switch at the equipment is in the On position and set it to On if it is in the Off position. Temperature settings will not change · Make sure the temperature settings are: (example: cannot set the heating higher 40 to 90°F (4 to 32°C) for heating. or the cooling lower). 45 to 99°F (7 to 37°C) for cooling. Heating does not come on. · Set the system switch to Heat (CT8775C only). · Make sure the temperature setting is above the room temperature. · Make sure the circuit breaker is not tripped, and reset it if necessary. · Make sure the power switch at the equipment is in the On position, and set it to On if it is in the Off position. · Wait five minutes for the system to respond. Cooling does not come on. · Set the system switch to Cool (CT8775C only). · Make sure the temperature setting is below the room temperature. · Make sure the circuit breaker is not tripped, and reset it if necessary. · Make sure the power switch at the equipment is in the On position, and set it to On if it is in the Off position. · Wait five minutes for the system to respond. System on indicator ( = heat, = Wait five minutes after seeing the flame or snowflake and check the cool) is lit, but no warm or cool air is registers again. If there is no warm or cool air coming from the registers, coming from the registers. refer to Heating does not come on or Cooling does not come on. If all of this has been checked, contact your local heating and cooling contractor. · If... Display does not appear. 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 have the following information available: · Thermostat model number. (Located on back of thermostat). · Thermostat date code. (Located below model number). · Type of heating/cooling system (example: Gas, oil, or electric; warm air, hot water, heat pump, steam or gravity). · Location and number of wires connected to the thermostat. 15 69-1676 Wiring Diagrams O 2 R W R Rc B G Y W 1 HEATING RELAY OR VALVE COIL 1 HEATING RELAY OR VALVE COIL FAN RELAY 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M19450 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 FACTORY INSTALLED JUMPER. M19451 O 2 Rc R B G Y W 1 HEATING RELAY OR VALVE COIL COMPRESSOR CONTACTOR FAN RELAY 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 FACTORY INSTALLED JUMPER. M19452 69-1676 16 4 O Rc 2 R B G Y3 W O B 2 Rc R G Y W COMPRESSOR CONTACTOR 1 HEAT CHANGEOVER VALVE FAN RELAY COOL CHANGEOVER VALVE COMPRESSOR CONTACTOR 1 HEATING RELAY OR VALVE COIL FAN RELAY 1 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 FACTORY INSTALLED JUMPER. M19453 3 USE A JUMPER WIRE (NOT SUPPLIED) TO CONNECT W TO Y. 4 USE EITHER O OR B FOR HEAT PUMP CHANGEOVER. 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 REMOVE FACTORY INSTALLED JUMPER BETWEEN R AND RC. M19454 Notice: This thermostat is a Class B digital apparatus that complies with Canadian Radio Interference Regulations, CRC c. 1374. 17 69-1676 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 or malfunctions, Honeywell shall repair or replace it (at Honeywells option) within a reasonable period of time. If the product is defective, (i) return it, with a bill of sale or other dated proof of purchase, to the retailer from which you purchased it, or (ii) package it carefully, along with proof of purchase (including date of purchase) and a short description of the malfunction, and mail it, postage prepaid, to the following address: Honeywell USA Honeywell Canada: Dock 4 -- MN10-3860 Honeywell Limited/Honeywell Limitée 1885 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422-3992 Scarborough, Ontario M1V 4Z9 This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused by damage which occurred while the product was in the possession of a consumer. Honeywells sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states do not allow the exclusion or limitation of incidental or consequential damages, so this limitation may not apply to you. THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE YEAR DURATION OF THIS WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. This warranty gives you specific legal rights, and you may have other rights which vary from state to state. If you have any questions concerning this warranty, please write Honeywell Customer Care, 1885 Douglas Dr. N., Golden Valley, MN 55422-3992. In Canada, write Retail Products ON30 Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9. 69-1676 18 19 69-1676 Automation and Control Solutions Honeywell Internation Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Scarborough, Ontario M1V 4Z9 Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. 69-1676 J.S. 7-03 www.honeywell.com/yourhome