User manual HONEYWELL CT2400

PROGRAMMABLE THERMOSTAT BY HONEYWELL Weekday/Weekend (5-day/2-day) Programmable Heat and/or Cool Low Voltage (20 to 30 Vat) Thermostat and Mounting Plate Model CT2400 PROGRAMMING AND INSTALLATION INSTRUCTIONS Limited One-Year Warranty Honeywell warrants this prcduct, excluding battery, to be free from defects in the workmanship or materials, under normal use and sewice, for a pericxl of one (1) year from the date of purchase by tha consumer. If, at any lime during the warranty period, the product is defective or malfunctions, Honeywell shall repair or replace it (at Honeywel~s option) within a reasonable period of time. [t the product is defective, (i) retUrn it, with a bill of sale or,other dated prcof of purchase, to the retailer from which you purchased it, or (ii) package it carefully, af0n9 wdh Proof of purchase (including date of purchaae) and a short description of the ma ffuncf ion, and mail it, postage prepaid, to the following address in Canada: Honeywell Limited/Honeywell Limit6e Honaywall Inc. Product Services ON 15-FFE Return Goods Department 74o Ellesmere Road 1050 13erkafdre Lane Plymouth, MN 55441-4437 Scarborough, Ontario Ml P 2V9 This warranty does not cover removal or reinstallation coats. 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 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 MERCHANTABILIV AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE YEAR DURATION OF THIS WARRANTY. Some states do not allow Ilmitafions on how long an implied warranty lasts, so the above limitation may not apply to you. This warranty givas you specific legal rights, and You may have other r!ghts which vary from state to state. If you have any questions concerning this warranty, please write our Customer Assistance Center, Honeywell Inc., P.O. Box 524, Minneapolis, MN 55440-0524 or call 1-800-468-1502, Monday-Friday, 7:00 a.m. to 5:30 p.m., Central time. In Canada, write Retail Products ON1 5-02H, Honeywell LimitecUHoneywell Limitee, 740 Ellesmere Road, Scarborough, Ontario Ml P 2V9. 35 TYPICAL ENERGY SAVINGS FOR REPRESENTATIVE CITIES IN THE U.S. AND CANADA u SaviW 2 3 so% ~za% for Gnc3-A.Oay u SawrQSfciTv4c=3A-CUIy' l&F [5-C] decrease. fi H l&F [5*C] d-- Q Thermostat patents pending. "~~ m lwF [50CI dncrease+~F [*C] deciease grfes WP+vxlmateiy 55 pemml ol these savings.) ~z,,~h Printed in U.S.A. G.S. 7-93 @Honeywell Inc. 1993 Welcome to the world of comfort and energy savings with your new Honeywell MagicStat@ programmable thermostat. Your new thermostat will automatically control the temperature in your home, keeping you comfortable while saving energy when programmed according to the instructions in this manual. Direct any questions concerning the application of this thermostat to Honeywell Customer Assistance at 1-800-468-1502, Monday-Friday 7:00 a.m.-53O p.m., Central time. @ RECYCLING THERMOSTAT If this thermostat is replacing a thermostat that contains mercury in a sealed tube (see illustration below), do not place your old thermostat in the trash. Contact your Jocal waste management authority for instructions regarding the recycling and proper disposal of your old thermostat. If you have questions, call Honeywell Inc. at 1-800-468-1502. Typical location of a mercury switch in a thermostat. --. w o 0 MERCURY SWITCH M3701 Table Of Contents STEP 1 Prepare For Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2 STEP 2 Remove Old Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 STEP 3 Install The Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 STEP 4 Program The Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 STEP 5 Adjust Fan Operation Switch, As Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 . . . . STEP 6 Adjust System On-Time, As Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 STEP 7 Mount Thermostat Mounting Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 STEP 8 Wire Thermostat Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2O . STEP 9 Mount The Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...24 STEP 10 Check Thermostat Operation After Programming And installing . . . . . . . . . . . . . . . . . . . . . . ...25 STEP 11 Set The Fan And System Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...27 Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...29 Limited One-Year Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 1 -- u Acquire tools and items below as needed. Also purchase two AA alkaline batteries; we recommend Energizer batteries. ~ CROSS-RECESSED SCREWDRIVER iiAND DRILL DRILL DRILL "(~, OR POWER WITH 3/16 INCH BIT, IF NEEDED, TO HOLES IN WALL . T ~ WIRE CUTTEWSTRIPPER OR SHARP KNIFE, IF NEEDED, TO STRIP WIRES ~AsKING TAPE ,F NEEDED, TO Ll&EL WIRES AS DISCONNECTED FROM OLD THERMOSTAT UIall LEVEL, IF NEEDED, TO LEVEL THERMOSTAT FOR APPEARANCE ulEa-'-U M378B 3 ~ Prepare For Installation u Check Table 1 to make sure this thermostat is compatible with your system. If it is not, return to retailer. For more information, call Honeywell Customer Assistance, toll-free 1-800-468-1502. TABLE 1 -COMPATIBILITY CHART. Compatible With CT2400 System Type Yes Gas-Standin~ Pilot Gas-Electro~c Ignition EA A Gas-Fired Boilers Gas--Millivolt Y:AA Oil-Fired Boilers Yes OWired Furnace Yes Electric Furnace Yes Electric Air Conditioning No Baseboard Electric (120/240 Line Volt) No Heat PumpdMultistage Equipment .,-. -- -----., I-,- . . . ..L ---- .fin/n"n .._i. -:.-..:. lNoI compaurm WIIrI arly I al~+u VUIL cxrum. ~Compatible with 2-wire Honeywell zone valves. Isolating relay requiredfor3-wire thermostats for zone valves. Not compatible with 2-wire White-Rodgers no. 1361 valves. ~Compatible with hot water baseboard systems. Will not work efficiently on steam or gravity systems. 7 _ Remove Old Thermostat [1 Test to make certain that your heating and cooling systems are working properly. If either 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]. u TURN OFF POWER to system at the furnace, or at the fuse/circuit breaker panel. U Carefully unpack your new thermostat and mounting plate; save the package of screws, instructions and receipt. U Remove cover from old thermostat. If it does not snap off when pulled firmly from the bottom, check for a screw used to lock on the cover. 4 u Loosen screws holding thermostat to subbase, wallplate or wall, and lift away. U Disconnect wires from old thermostat or subbase. As you disconnect each wire, use masking tape to label it with the old terminal designation. If there are only two wires, they do not need to be labeled. If there is an extra wire that is not connected to your old thermostat, you will ako not be connecting it to your new thermostat. Keep the wires from falling back into the wall by wrapping them around a pencil as shown. ----. . Replacing a Clock Thermostat that has C or Cl Clock Terminals? If you are replacing a Honeywell Chronotherm@ Thermostat, you may find one or two wires that go to the C or Cl clock terminals on the Chronotherm Thermostat wiring wallplate. Do not allow them to touch, or you may damage your transformer. Disconnect the wires and wrap them separately, using electrical tape. Do not wrap them together. Place the wires where they will not interfere with the operation of the new thermostat. Record the colors and terminal designation labels of the remaining wires. Six or more wires? If there are six or more wires (excluding clock wires attached to terminals), you most likely have a variation of a heat pump 5 -- or multistage system. The thermostat is not compatible with such systems so return the product to the place of purchase. If you would like information about which programmable thermostats will work with your system, call Honeywell Customer Assistance at 1-800-468-1502. Three thermostat wires? If you have three wires for heating only and can operate the fan using the fan ON switch, this thermostat will work with your system. However, some hot water (zoned) heating systems have three thermostat wires. The thermostat will not work without installing an isolating relay on these systems. For details, call Honeywell Customer Assistance at 1-800468-1502. _ Install The Batteries IMPORTANT: Batteries must be installed for programming and operation of the thermostat and heating/cooling system. u Purchase two AA alkaline batteries; nonalkaline batteries will not last as long, and may leak, causing damage to thermostat or wall surface. We recommend Energizer batteries. ·l Make sure the thermostat is set in the OFF position. El Use a coin to remove battery door. u Install the fresh batteries as shown, making sure positive and negative terminals are oriented correctly. O Replace battery door. 6 A \ M1779B As the batteries are running low, a "bAt Lo" indicator will flash for one to two months before batteries run out completely. Replace the batteries as soon as possible after the indicator starts flashing. If you do not replace the batteries sometime during the flashing "bAt Lo," the indicator will eventually stop -- flashing. "bAt Lo" will stay on without flashing, indicating the thermostat and heating/cooling system have stopped working and the batteries are almost completely dead. After the batteries are completely dead, the "bAt Lo" indicator will disappear, leaving a completely blank display. Press down on left ends of batteries to remove. If you insert the new batteries within 20 to 30 seconds of removing the old ones, you will not have to reprogram the thermostat. However, if the display is blank, the batteries are dead or incorrectly installed, and you will have to reprogram. See pages 12 and 13 to reprogram. IMPORTANT: Although the thermostat has a low battery indicator, replace the batteries once a year to prevent the thermostat and heatinrjcooling system from shutting down due to lack of battery power. As a precaution, when leaving home for longer than a month, change batteries before you leave to prevent the system from shutting down due to lack of battery power. a: INSTALL TWO AA ALKALINE /BATTEFIIESASStiOIAIN E=l M171 7 - Program The Thermostat After the batteries are installed, the thermostat can be easily programmed in your hand before it is installed on the wall. If you would prefer to program the thermostat after it is installed on the wall, skip to page 8, and return later to this programming section. The following personal programming chart (pages 10 to 11 ) may be helpful for planning your program schedule of time and temperature settings for various times of the day. Four time periods are available during weekdays -- "WAKE," "LEAVE," "RETURN," and "SLEEP." These periods can be seen individually on the display as you press the SET SCHEDULE key. n `WAKE" is the time period you want the house at a comfortable temperature when you get up and while you get ready for work or school. (This will be a higher temperature during heating season, or a lower temperature during cooling season.) "LEAVE" is the time period you can set for an energy-saving temperature while you are away at work or school. (This will be a lower temperature during heating season, or a higher temperature during cooling season.) "RETURN" is the time period you want the house at a comfortable temperature for activities before bedtime. (Again, higher heat or lower cool.) "SLEEP" is the time period you can set for an energy-saving temperature while you are sleeping. (Again, lower heat or higher cool. For more comfortable sleeping, some people choose not to raise the cool temperature during the night.) You will set one schedule for weekdays and another for weekends, because your requirements will probably be different for each. During weekends, only the "WAKE and "SLEEP time periods are available. Fill in the times and temperatures you desire for weekdays and weekends. If you decide not to program the thermostat, it will automatically control heating at 68° F [20° C], and cooling at 78° F [26° C], 24 hours a day. Also, you do not need to enter a time and temperature program for all periods if your schedule does not require it. For example, a house that is occupied during weekdays would only require programs for "WAKE and "SLEEP." If no program is entered for the weekends, the thermostat will operate on the weekday "SLEEP program all weekend. When pressing the keys, use the ball of your finger or a soft pencil eraser. Use of sharp fingernails or pencil points can damage the keypad. If you make an error at any time during programming, just press the RUN PROGRAM key, and continue again at the step where you left off. 9 Personal Programming Chart HEATING PROGRAM Weekdays WAKE LEAVE RETURN SLEEP Weekends A i WAKE SLEEP ~ If you decide not to enter weekend programs, SLEEP from the weekday program will copy to the weekend schedule. ~ The temperatures cannot be set any higher than 88° F [31° C] or any lower than 45° F [7: C]. 10 .-- Start Time A Heating Temperature .- -- COOLING PROGRAM Weekdays WAKE LEAVE RETURN SLEEP Weekends ~ WAKE SLEEP ~ If you decide not to enter weekend programs, SLEEP from the weekday program will copy to the weekend schedule. ~ The temperatures cannot be set any higher than 88° F [31 0 C] or any lower than 45° F [7° C]. NOTE: If you decide not to program the thermostat, it will automatically control heating at 68° F [20° C], and cooling at 78° F [26° C], 24 hours a day. 11 Start Time Cooling Temperature~ COOLING PROGRAM Weekdays WAKE LEAVE RETURN SLEEP Weekends~ WAKE SLEEP ~ If you decide not to enter weekend programs, SLEEP from the weekday program will copy to the weekend schedule. ~ The temperatures cannot be set any higher than 88° F [31 0 C] or any lower than 45° F [7° C] NOTE: If you decide not to program the thermostat, it will automatically control heating at 68° F [20° C], and cooling at 78° F [26° C], 24 hours a day. 11 ----This guide can be used for programming your new thermostat. NOTE: Batteries are required for operation and programming. When inserting batteries, set system switch to OFF. Remove battery door (on thermostat left side) using a coin at the bottom. Follow instructions on pages 6 and 7. Set Current Time/Day To set time, press and release ~kwma~ once, o Time Ahead 0 Start Time Cooling Ternperature~ -- .-- until current time shows; to set day, Time ~ n Back pressandreleasewagain, V until current day shows; then press p~lm . n Back Heating Program With system switch at HEAT, press and release ~~uk once. "WAKE," Mon-Fri and "SET" c 1 appear on display. 12 Time Use c Ahead Temp 1 to program "WAKE time and Warmer 0 Cooler to program "WAKE" temperature for Time Ahead o n Mon-Fri. Repeat sequence for "LEAVE," "RETURN," "SLEEP." Back n to program Press ~C~~Ub until "WAKE," "SA SU" and "SET" appear on display. Use c 1 Back Temp o "WAKE" time and ,--, to program "WAKE temperature for Sat-Sun. Repeat sequence for "SLEEP." Cooler u u -- Warmer Cooling Program With system switch at COOL, follow the same instructions as for Heating Program. After programming, adjust fan and system switches as desired. Press and release start the program. 13 L-1 pr&m to ---. A quick guide for operating or making changes follows: NOTE: System switch must be set to Heat or Cool to perform the following: Temporarily Change Temperature for Current Period Only-- u Temp -- Warmer . Temporary indicator will P~& o Cmlar n show on display; it will cancel itself at next scheduled change. To cancel sooner, press Temp Hold a Temperature Indefinitely-- ~~~P , u press pJ& to cancel. Coobr n0 ; 0 Warmaf 14 - .-- . Check Current Temperature Settingpressing this will cancel your change.) n p;~~m . (If using Temporarily Change or Hold, Run Check Programs-- ~~Uk repeatedly to see each time and temperature; then Program . o Time 1 ( Cancel a Program- ~~~Ub until program to cancel shows; then H together. o Permanently Change a Program--Repeat steps under Heating Program or Cooling Program (pages 12 and 13) as applicable. Return to normal program or start program -- Beck D c1 u p;~~m . : Customer Assistance ~m _ Adjust Fan Operation Switch, As Required D The thermostat fan operation switch, labeled FUEL SWITCH (see illustration on page 17) is factory-set in the "F position. This is the correct setting for most systems. If your system is an electric heat system, set the switch to "E. The "E setting will allow the fan to turn on immediately with the heating or cooling in a system where the "G" terminal is connected. _ Adjust System On-Time, As Required El The system on-tim e is facto-~-set for a warm air, gas or oil heating system. If you are installing it on another type of system, the system on-time must be adjusted accordingly by setting screws A and B on the back of the thermostat. Use the heating system table shown in the illustration, (page 17) as a guide. The system on-time should be optimized according to the type of system to minimize room temperature swings. Setting the screw "out one turn" means turning the screw approximately 360° counterclockwise, or about one complete turn. In the unlikely event that you want longer furnace on-time, readjust screws A and/or B as follows: First, turn both screws in completely, then adjust for system type: q Warm Air Furnace-Set at the Hot Water setting, (A - out one turn, B - in). q Electric Furnace-Leave at the Warm Air Furnace setting (A - in, B - in). 16 NOTE: This thermostat does not have a setting for steam/gravity air. Cycles would not be long enough for accurate temperature control. IMPORTANT: When using a high efficiency furnace such as a 90 percent or greater Average Fuel Utilization Efficiency (AFUE) unit, adjust screw A OUT ONE TURN and screw B IN. THERMOSTAT BACK .--------- 1 1 1 1 1 1 1 1 1 t Trcl--- .-:-:----------------­­ - - . . : ,:. . ~-------, ""'::''mml .,W E Y G,,' ; ; 1 [G- I -A ;5, FUEL SWITCH r- ;&:%_& F~IE " :--~ : 1 Rc : IR 19), Q' ~ ilil :_ ----J---- ­-- J__;lJ--____ --_____________ :___y:::''l~lfi __; 17 ` ~ Mount Thermostat Mounting Plate ~ Position mounting plate on wall. Use a level to make sure mounting plate is level. Use a pencil to mark the two mounting holes. ~/ ;&ORS (2) `b 18 -- --. ·l Remove mounting plate from wall, and drill 3/1 6 inch holes in wall (if drywall) as marked. For firmer material such as plaster or wood, drill 7/32 inch holes. Gently tap anchors (provided) into drilled holes until flush with the wall. u Reposition mounting plate over holes, pulling wires through wiring opening. Loosely insert two mounting screws into holes. u Level for appearance only; thermostat will function properly even when not level. Tighten mounting screws. `,[ ,1= `~: M1714A -- --. LEVEL ( HI la El ) II 19 _ Mount The Thermostat A. ENGAGE TABS AT TOP OF THERMOSTAT AND MOUNTING PLATE. c. B. PRESS LOWER EDGE OF CASE TO blTCH. -. . >-, ,., = / -­ J,(4 1 Move the system switch to HEAT and the fan switch to AUTO. + NOTE: To remove thermostat from wall, first pull out at bottom of thermostat, removing top last. *4 Operation mm Check Thermostat Installing After Programming And HEATING Do not check heating system operation by jumpering thermostat terminals at the primary control such as the gas valve, zone valve,or oil burner control. This will damage the thermostat. Instead, jumper R and W wires at the thermostat. Temp Warmer c 1 Press key until the setting is about 10° F [6° C] above room temperature. Heating should start and the fan should run after a short delay (immediately if fan operation switch is set in E position). Press key until setting is about 10° F [6° C] below room temperature. The heating equipment should shut off. Temp Cooler o 25 -- COOLING To avoid possible compressor damage, do not operate the cooling system when outside temperature is below 50° F [1 O" C]. See compressor manufacturer instructions for further information. NOTE: When cooling setting is changed, thermostat may delay up to five minutes before turning on the air conditioner. This delay protects the compressor. Move the system switch to COOL and the fan switch to AUTO. Temp Coolar n Temp Warmer n Press key until setting is about 10° F [6° C] below room temperature. The cooling equipment and fan should start. Press key until the setting is about 10° F [6° C] above room temperature. The cooling equipment and fan should stop. Move the system switch to OFF with the fan switch still at AUTO. . . The system and fan should be off. 26 _ Set The Fan And System Switches ,tio on First set the fan switch. s r FAN AUTO: Normal setting for most homes. A sinale-sDeed fan will turn on ~ automatically-with'air conditioner or furnace. A two-speed fan will usually run on high with air conditioner and on low with furnace. Exception: When Fan Operation Switch on back of thermostat is set to "E" position (see page 16), fan will operate with furnace only. FAN ON: The fan runs continuously. Auto On Use for improved air circulation during ~ special occasions or for more efficient electronic air cleaning. (In a heat-only system, fan will run continuously only when fan relay is connected to the thermostat.) 27 Then set the system switch. COOL: The thermostat controls your air conditioning system. OFF: Both the heating and air conditioning systems are off. HEAT: The thermostat controls your heating system. Cgol OJ Hgat C:ol 0/ H~at 28 Troubleshooting Guide IF... Display will not come on. THEN... Set the system switch to OFF. Remove batteries. Insert batteries backward for at least five seconds to reset thermostat. Replace batteries correctly. Display should come on. Make sure batteries are fresh and installed correctly. Gently clean battery contacts using a soft pencil eraser. Do not use anything abrasive on clips. You have reached the temperature setting limit. The setting range is 45° F to 88°F [7°Cto310 C]. Check the program times for the period in question. Be sure that AM and PM indications are correct. Make sure the current day and time are correct. Reprogram if necessary. Check that switch on thermostat is set to HEAT. 29 Temperature display will not go lower than 45° F r" C] or higher than 88° F [31 C] during programming. 0 Temperature change occurs at the wrong times. Heating will not come on. Heating will not come on (continued). 9 Check the system fuse or circuit breaker and replace or reset if necessary. Check for correct wiring and good connections. Jumper wires R and W. If heat does not come on, contact your heating dealer. If display is blank or says "bAt Lo," install fresh batteries. If temperature setting is higher than current temperature, and SYSTEM ON indicator is lit, contact Honeywell Customer Assistance at 1-800-468-1502. Cooling will not come on. : Check the system fuse or circuit breaker and replace or reset if necessary. Check for correct wiring and good connections. Jumper wires Rc and Y. If cooling does not come on, contact your cooling dealer. If display is blank or says "bAt Lo," install fresh batteries. The thermostat has a built-in time delay on cooling. Allow five to ten minutes after changing the setting before the air conditioner starts. 30 Make sure outdoor disconnect is engaged (on). If temperature setting is lower than current temperature, and SYSTEM ON indicator is lit, move system switch from COOL to OFF for ten minutes. After ten minutes, return switch to COOL position. If air conditioner comes on, compressor may have reached its high limit temperature protection and shut down. If air conditioner does not come on after the ten minutes and the SYSTEM ON indicator is lit, contact Honeywell Consumer Assistance at 1-800-468-1502. If 2- or 4-wire installation, verify that R-Rc jumper is installed. Check that switch on thermostat is set to COOL. The house is too warm or too cool. s Press RUN PROGRAM key to check the current temperature setting. s I f desired, change the temperature setting. See I)age 14. Wow time for the furnace to heat up and the fan to :ome on before checking for heat at the register. (Check to make sure system on-time is set (:orrectly according to pages 16 and 17.) 31 SYSTEM ON indicator is lit, but no heat is coming from the registers. -- The furnace cycles too frequently, or the system cycle length is too short or too long. The thermostat current setting does not mstch the display temperature to within t 10. s Readjust system on-time according to instructions on pages 16 and 17. s Check that the wiring hole in the wall behind the wallplate has been plugged with insulation to prevent drafts that might adversely affect thermostat operation. s Be aware that it is normal for the current setting and display temperature to differ on occasion. s During recovery from setback or setup, setting and display temperatures may differ for up to 30 minutes after the recovery period. s Make sure hole behind thermostat is plugged with insulation to help prevent drafts from adversely affecting thermostat operation. s The thermostat is factory-calibrated, and cannot be adjusted. Incorrect room temperature showing on thermostat display. 32 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 1-800-4681502, 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.), and number of wires connected to the thermostat. NOTICE This equipment is a Class B digital apparatus, which complies with Canadian Radio Interference Regulations, CRC c. 1374. 33