Honeywell CT41A User's Manual
Contents
1. it is level See step 3 and Fig 5 Thermostat is affected by drafts or radiant heat Contact a qualified service technician to change the location Thermometer is out of calibration Recalibrate See step 7 No air conditioning System switch is in Off or Heat position Move switch to Cool position Blown fuse or tripped circuit breaker Replace fuse or reset circuit breaker Compressor switch located outdoors is turned off Move switch to On position Incorrect connections to thermostat With power to system off tighten all mounting and terminal screws Repair broken wires Other Contact service technician for assistance 69 0788 2 CT41A HEATING COOLING THERMOSTAT 7 RECALIBRATE THERMOMETER If the thermostat setpoint and the thermometer reading do not agree the thermometer may need recalibration Follow this procedure Q Remove thermostat cover Q Set the cover on a table near an accurate thermometer Q After allowing five or ten minutes for stabilization compare the readings Q If the readings are the same replace the cover and put the system into operation Q Ifthe readings are different insert a hex head wrench into the thermostat shaft and turn it until the thermometers have the same reading See Fig 8 Q Replace cover and put the system into operation 69 0788 2 BACKSIDE OF COVER THERMOMETER SHAFT HEX ean 4 WRENCH F2. 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 Relations 1985 Douglas Dr N MN10 1461 Golden Valley MN 55422 In Canada write Retail Products ON15 Honeywell Limited Honeywell Limit e 35 Dynamic Dr Scarborough Ontario M1V 4Z9 7 69 0788 2 CT41A HEATING COOLING THERMOSTAT Honeywell Automation and Control Solutions Honeywell International Inc Honeywell Limited Honeywell Limit e 1985 Douglas Drive North 35 Dynamic Drive Golden Valley MN 55422 Scarborough Ontario MIV 4Z9 69 0788 2 GH Rev 10 03 Q Noe a TS post consumer paper fibers www honeywell com yourhome
3. Honeywell CT41A Heating Cooling Thermostat INSTALLATION INSTRUCTIONS MERCURY NOTICE If this control is replacing a control that contains mercury in a sealed tube do not place your old control in the trash Dispose of it properly Honeywell Contact your local waste management authority for instructions regarding recycling and the proper disposal of an old control 1 PREPARE FOR INSTALLATION If you are unsure about wiring procedures please call a qualified service technician for assistance Q To correctly install your new thermostat follow these step by step instructions It is recommended that as you read understand and complete each step you place a check mark in each box provided Q See Your New CT41A Thermostat section above to determine the thermostat suitability for compatibility with your home system If not return it to the retailer Acquire the required installation tools and supplies as needed See Fig 1 YOUR NEW CT44A THERMOSTAT 8 Hay Heating Cooling 15 to 30 Vac Thermostat Congratulations on the purchase of your new thermostat Your new CT41A Thermostat replaces most 15 to 30V SCREWDRIVER 4 wire heating cooling system thermostats The CT41A HAND OR POWER eee 4 saat nee DRILL WITH 3 16 INCH is suitable for gas or oil heat or electric air conditioning DRILL BIT IF NEEDED TO systems DRILL HOLES IN WALL Direct questions about this thermostat to our Web site at www hone
4. arking GorF Fan G YorCorMoryY Cooling Y W or H or W Heating Ww RC V VC or B Power Your 5 wire system cannot use this thermostat use a CT87B instead RH M VR 4 A or Power R R TERMINAL SCREWS M8067A Fig 4 Connect wires from wall to thermostat matching terminals CT41A HEATING COOLING THERMOSTAT Q Push excess wire back into wall and plug hole with nonflammable insulation to prevent drafts from affecting thermostat operation Q Remove thermostat cover by pulling outward on right edge of cover until it snaps free of the thermostat base Q Fasten thermostat to wall or vertical outlet box with a screw through the top mounting hole See Fig 2 for hole location Q Place a bubble level or plumb line against the thermostat to find the level position See Fig 5 Starta screw in the center of the bottom mounting hole Move the temperature setting lever if necessary to uncover the mounting hole BUBBLE LEVEL PLUMB BOB OR WEIGHT M3774 Fig 5 Level thermostat Q Recheck for level positioning and firmly tighten both mounting screws Q Be sure you have the current draw anticipator setting for your system This is the number you wrote in the box in step 2 Remove Old Thermostat section If you could not find the current draw for step 2 look on your primary control at the furnace See Fig 6 The primary control is usually a gas valve zone valve ora relay or burner control box
5. ig 8 Adjusting thermometer calibration CT41A HEATING COOLING THERMOSTAT Limited One Year Warranty Honeywell warrants this product excluding battery 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 Honeywell s 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 Return Goods Canada Honeywell Limited Honeywell Limit e Dock 4 MN10 3860 Product Services ON15 1885 Douglas Dr N 35 Dynamic Dr Golden Valley MN 55422 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 Honeywell s 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
6. ning system operates On fan operates continuously NOTE In the following instructions disregard heating or air conditioning directions if not applicable to your system A CAUTION Compressor Damage Hazard Operating at too low of an outdoor temperature can cause compressor damage Do not operate cooling if outdoor temperature is below 50 F 10 C Allow compressor to remain off for five minutes before restarting Refer to manufacturer s recommendations Q Turn on power to the heating air conditioning system 69 0788 2 Q Observe system operation for at least one cycle on both heating and air conditioning To observe Q Place the System switch at the Heat position and the Fan switch at the Auto position Move the temperature setting lever 10 F 6 C below room temperature The heating equipment should turn on A short warmup period may be required before system fan turns on NOTE Some systems have a time delay that can pre vent operation up to five minutes Q Turn the Fan switch to On The system fan should turn on and operate continuously The system blower should continue to operate at any System switch or thermostat setting 5 THERMOSTAT Q Place the System and Fan switches at the desired settings for operation 6 TROUBLESHOOTING TABLE 2 Your Honeywell thermostat requires little or no attention Most problems can be resolved according to Table 2 NOTE If your system is heating only or air condi
7. rs representing the electrical current rating of the primary control of your system in amperes The numbers range from 0 18 to 1 0 If no heat anticipator indication is showing do not be concerned move on to the next step TOP MOUNTING HOLE THERMOSTAT TO WALL OR OUTLET BOX ADJUSTABLE HEAT ANTICIPATOR SETTING LEVER MOUNTING CLIPS FOR COVER FAN SWITCH SYSTEM SWITCH BOTTOM MOUNTING HOLE TEMPERATURE SETTING LEVER M3782A Fig 2 Locating heat anticipator adjustment mechanism Q Loosen screws holding thermostat to subbase wallplate or wall and lift away Q Disconnect wires from old thermostat or subbase As you disconnect each wire tape the end and label it with the letter of the terminal designation If there are only two wires they do not require labeling Wrap wires around a pencil to keep them from falling back into the wall as shown in Fig 3 69 0788 2 WIRES THROUGH WALL OPENING M5136 Fig 3 Wrapping wires around pencil O Keep the old thermostat for reference until your new thermostat is functioning smoothly 3 WIRE AND MOUNT THERMOSTAT Q Connect wires from the wall to the matching terminals on the back of the thermostat See Fig 4 Tighten the screws NOTE If terminal designations on old thermostat do not match those on new thermostat see Table 1 Table 1 Terminal Functions New Thermostat Old Thermostat Terminal Terminal Marking Function M
8. tioning only disregard sections not applicable to your system CT41A HEATING COOLING THERMOSTAT Table 2 Recommended Corrective Action for Your System Symptom No heat Problem System switch is at Off of Cool position Corrective Action Move System switch to Heat position Blown fuse or tripped circuit breaker Replace fuse or reset circuit breaker Furnace power switch is at Off Turn furnace power switch to On No pilot flame Relight pilot flame according to furnace manufacturer instructions Incorrect connections to thermostat With power to furnace at Off tighten all mounting and terminal screws Repair frayed or broken wires Other Contact a qualified service technician for assistance Furnace turns on and off Burner On period is too short Remove the thermostat cover and move the heat anticipator lever counterclockwise left one scale mark Replace the cover and wait several hours for the system to stabilize Major swings in temperature greater than 2 F 1 C when outside temperature is stable Burner On period is too long Remove the thermostat cover and move the heat anticipator lever clockwise right one scale mark Replace the cover and wait several hours for the system to stabilize Thermostat setting and thermometer reading disagree Thermostat is not level Recheck the thermostat position on the wall Use bubble level to make sure
9. with the thermostat wires connected to it For electric heat add the fan relay current usually 0 2A to 0 4A SHOWS VOLTAGE RATING V8043E 10044 24V 50 60CY SHOWS 32 AMP 60CY ANTICIPATOR fone SETTING ZONE VALVE OIL BURNER CONTROL SHOWS CURRENT DRAW SHOWS VOLTAGE SHOWS VOLTAGE RATING To BURNER 24 Vac 50 60 Hz 0 4 AMP SHOWS ANTICIPATOR SETTING FROM MAIN FUEL SUPPLY M61168 TYPICAL GAS VALVE Fig 6 Locate your system current draw anticipator setting Q Set the heat anticipator indicator at the rating printed on the primary control See Fig 7 CAUTION Heat Anticipator Hazard Setting heat anticipator too low can cause anticipator burnout Set heat anticipator at recommended rating to avoid shorting out your valve or control and prevent burnout of your heat anticipator SCALEPLATE ADJUSTABLE HEAT ANTICIPATOR SETTING LEVER M3784 Fig 7 Set heat anticipator indicator to match your primary control rating Q Press thermostat cover firmly onto the mounting clips See Fig 2 3 69 0788 2 CT41A HEATING COOLING THERMOSTAT 4 CHECK OUT THERMOSTAT The System switch controls as follows Heat heating system only operates Off heating and air conditioning systems are discon nected Cool air conditioning system only operates The Fan switch controls as follows Auto fan operates when heating or air conditio
10. ywell com yourhome or call the customer information line at 1 800 468 1502 WIRE CUTTER STRIPPER IF NEEDED TO STRIP WIRES Lje Je Ez LEVEL IF NEEDED TO LEVEL ee THERMOSTAT FOR APPEARANCE Fig 1 Required installation tools supplies TYPICAL LOCATION OF A MERCURY SWITCH IN A THERMOSTAT M10614 All Rights 2 69 0788 2 Copyright 2003 Honeywell International Inc CT41A HEATING COOLING THERMOSTAT 2 REMOVE OLD THERMOSTAT Q Test to be sure your heating and air conditioning systems where applicable are working correctly If not 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 CAUTION Equipment Damage Hazard Handling wires during installation can damage equipment Disconnect power at furnace or main breaker fuse box before beginning installation Q Carefully unpack your new thermostat and save the package of screws the instructions and the receipt Q Remove the cover from the old thermostat If it does not snap off when pulled firmly from the bottom check for a screw that locks on the cover Q Before removing the old thermostat from the wall look at it carefully to locate the heat anticipator adjustment mechanism see Fig 2 Make a note here of the anticipator setting for future reference The heat anticipator pointer if adjustable is set at one of a series of numbe
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