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CT8611
PROGRAMMABLE
HEAT PUMP THERMOSTAT
INSTALLATION MANUAL
IMPORTANT: This thermostat may be programmed either
before or after installation. Refer to Owner’s Guide,
form 69-0398, for programming instructions.
12-93 • Form Number 69-0816
1 69-0816
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Toll-free Customer Assistance For all questions concerning this thermostat, please read and follow the instructions. If additional assistance is needed, call Honeywell Customer Assistance toll-free at 1-800-468-1502, Monday-Friday, 7:00 a.m.-5:30 p.m. Central Time. Before you call, please have the following information available—thermostat model number and date code, kind of heating/cooling system (i.e., hot water, warm air, oil, gas, etc.), number of wires connected to the thermostat. NOTICE Th
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PREPARATION 1 Your new thermostat provides energy saving WARNING control for a 24 Vac multistage heat pump heating/ cooling system direct from the control transformer. This device is designed to operate on low The CT8611 includes SYSTEM and ENRG SAV voltage (20 to 30 Vac). The application of LEDs located near the top of the thermostat face. higher voltage is dangerous and may cause The SYSTEM LED lights when the thermostat is electrical shock, fire or personal injury. signaling for heating or co
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TOOLS REQUIRED FOR INSTALLATION Assemble a flat blade screwdriver and other FLAT BLADE HAND OR POWER SCREWDRIVER tools as needed (right). DRILL WITH 3/16 INCH DRILL BIT, IF NEEDED TO DRILL HOLES IN WALL Test to make certain that your heating and cooling systems are working properly. If either does not work, contact your local heating/air condi- tioning dealer. To avoid compressor damage, do not operate the cooling system if outdoor tempera- ture is below 50° F [10° C]. MASKING TAPE, IF NEEDED WI
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REMOVE OLD THERMOSTAT 2 Disconnect wires from old thermostat or sub WARNING base. Always label all wires as you disconnect them from your old thermostat. Use the CT8611 Wire If your old thermostat is attached to a Tags provided to label each wire with the appropriate junction box in the wall, it is likely that terminal designation as you remove it. It is important 120V are present. To prevent electrical to note the terminal designation when removing wires. shock hazard, do not proceed. Call a qu
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Do not discard your old thermostat until you have thoroughly checked out system opera- tion with your new Honeywell CT8611 Heat Pump MERCURY Thermostat installed. If your old thermostat con- SWITCH tains mercury, do not dispose of it in the trash, see below. ANTICIPATOR RECYCLING THERMOSTAT SCALE If this thermostat is replacing a thermostat that contains mercury in a sealed tube, do not place your old COILED ANTICIPATOR BIMETAL SETTING LEVER M3376 thermostat in the trash. Contact your local wast
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FAN ON AUTO . HT HEAT OFF COOL AUX. HEAT MOUNT THERMOSTAT SUBBASE 3 The subbase does not require leveling for Thread wires through the center opening of proper operation; level it for appearance only. the subbase. Then, mount the subbase using the two screws provided. Gently tighten the screws, Remove thermostat from subbase (Fig. 1). level the top surface of the subbase and then se- curely tighten the screws. Mount the subbase directly onto the wall with WALL the screws included in the pack
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WIRE THERMOSTAT TERMINALS 4 FOR STRAIGHT NOTE: All wiring must comply with local codes and INSERTION – STRIP 5/16 in. [8 mm] ordinances. If unsure about household wiring procedures, call Honeywell Customer Assistance with your questions Monday-Friday, 7:00 a.m.- FOR WRAPAROUND – STRIP 7/16 in. [11 mm] RESTRICT 5:30 p.m., Central time, 1-800-468-1502. WIRING TO THIS AREA Refer to the CT8611 Heat Pump Thermostat Wiring Guide, form 69-0817, and to the wire labels you applied when you removed the
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Figs. 4 and 5 illustrate typical hookups for the CT8611 heat pump thermostat. CT8611R CT8611R R C R C O O B B P L Y1 W1 G L Y1 W1 G P E E W2 W2 DEFROST COMPRESSOR AUX. HT. C/O RELAY 1ST STAGE AUX. HT. C/O RELAY MONITOR CONTACTOR HEAT CONTROL RELAY HEAT RELAY RELAY HEAT EM. HT. DEFROST 1ST STAGE EM. HT. C/O RELAY C/O RELAY MONITOR FAN FAN RELAY COOL RELAY RELAY COOL COOL CONTROL 1 1 L2 L2 L1 L1 (HOT) (HOT) 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVE
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COMPLETE INSTALLATION 5 ADJUST CYCLE RATE NOTE: MOST APPLICATIONS DO NOT REQUIRE 1st stage heating and 1st stage cooling cycle A CHANGE IN CYCLE RATE. rates are factory-set for heat pumps. The heat The room air temperature normally varies pump compressor cycle rate cannot be adjusted. slightly from the comfort temperature setting with To customize the thermostat’s performance to the cycling of the heat pump or auxiliary heater. different types of heating equipment, however, a cycle rate adjustme
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AUTO TEMPERATURE PRESENT RUN SETTING PROGRAM PERIOD TIME SET SKIP PRESENT NEXT DAY WAKE LEAVE AHEAD WARMER DAY/TIME PERIOD CHANGE HOLD SET BACK COOLER HEAT/COOL SLEEP RETURN TO LAST TEMP PERIOD program will remain for only about 20 seconds in If batteries are completely dead, the display the event of power loss. will go blank when the thermostat is removed from When batteries are first installed, the display the subbase. After replacing the battery in this will flash 1:00 PM and 32°. When the ba
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SET DAY AND TIME If the display will not come on: Restore 24V power to the thermostat. When — check the mounting of the thermostat to the power is applied, the display will read 1:00 PM and subbase. If loose or misaligned, remove thermo- indicate the room temperature. It will go off for a few stat and reinstall on the subbase, making sure it seconds, then begin to flash on and off. Set the is firmly attached. present day and time. — check to see that system power is on. — check voltage between R
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CHECK THERMOSTAT OPERATION 6 Heating should start and the fan should run (there may be a delay of 5-10 minutes before heat turns CAUTION on). Press COOLER key until the setting is about 10° F [6° C] below room temperature. The heating • Do not check the heating system op- equipment and fan should shut off. eration by jumpering thermostat termi- During checkout, the backup heat will come nals at the primary control. This will on immediately. During normal operation, the backup damage the thermost
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on your furnace or air conditioner, it considers (1) air ABOUT ADAPTIVE INTELLIGENT TM temperature, (2) the temperature of the wall and (3) RECOVERY when you want the comfort temperature established. • People perceive temperature from a variety of TM During Adaptive Intelligent Recovery the ther- sources, not only from the air in the room, but mostat increases the control temperature gradually also from their surroundings—walls, windows and turns the equipment on and off several times to and fu
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IF ADDITIONAL ASSISTANCE IS NEEDED, PLEASE CONTACT HONEYWELL CUSTOMER ASSIS- TANCE AT 1-800-468-1502, MONDAY-FRIDAY, 7:00 AM-5:30 PM, CENTRAL TIME. BEFORE YOU CALL, PLEASE HAVE THE FOLLOWING INFORMATION AVAILABLE: TYPE OF HEATING SYSTEM, IGNITION TYPE, WHETHER GAS OR ELECTRIC AIR CONDITIONING, MODEL NUMBER OF OLD THERMOSTAT, NUMBER OF WIRES, AND TERMINAL DESIGNATIONS USED. 15 69-0816
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Home and Building Control Home and Building Control Helping You Control Your World Honeywell Inc. Honeywell Limited—Honeywell Limitée 1985 Douglas Drive North 740 Ellesmere Road Golden Valley, Minnesota 55422 Scarborough, Ontario M1P 2V9 16 G.S. 12-93 ©Honeywell Inc. 1993 Printed in Tiawan Form Number 69-0816
