Honeywell T8665C manual

69-1538 OWNER’S GUID E ® U.S. Registered T rademark Copyright © 2003 Honeywell International Inc. All Rights Reser ved T8665C,D,E EnergyPro™ Thermostat[...]

69-1538 2 Contents Introduction ........ .............. .............. .............. .............. .............. .............. ................. ..... ............ ...... 3 Using this Guide .............. ........ .............. .............. .............. .............. .............. .............. ...... ............ 4 Thermostat Features [...]

3 69-1538 INTRODUCTION Congratulations on purchasing your new EnergyPro™ Thermostat. This exciting new product is designed to add a new level of service, energy savings and convenience to your home comfort system. As part of a larger system of products and services from your Energy Utility , your new thermostat allows you to take advantage of spe[...]

69-1538 4 USING THIS GUIDE The T8665C,D,E Commu nicating Thermostat uses two-way radio frequency (RF) to send and receive information. This information ca n be used to make changes to your thermostat settings, or settings from your Energy Utility . The following symbols will help you identify the features that appl y to your system: —– T ip sym[...]

5 69-1538 Fig. 1. Thermostat keyboard descr iption. M20893 A Time Set Program Run Program Hold Temp Set Current Day/Time Day Heat/Cool Settings Wake Fan System Copy Daylight Time Leave Return Sleep INCREASE RAISES TEMPERATURE SETTING DECREASE LOWERS TEMPERATURE SETTING INFORMATION DISPLAYS CURRENT HEAT/COOL TEMPERATURE SETTING, FILYER STATUS, AND O[...]

69-1538 6 Fig. 2. Example of thermostat display . Auto System Fan Off Wait Wake Mon AM Filter Days On DST Tue Wed Thu Fri Sat Sun Repl Batt Room Leave Return Sleep Recovery Set Program Set Day/Time Em Ht Aux Ht Hi Med Lo Critical Hold for Temporary Setting Em Heat M20894 DISPLAYS EITHER CURRENT TIME OF DAY OR PROGRAM TIMES SHOWS THERMOSTAT IS IN TH[...]

7 69-1538 THERMOSTAT FEATURES • Adaptive Intelligent Reco very™ Control for comfort and e nergy savings. • Customize the prog ram schedule— program your own sch edule to fi t your needs. • T emporary sch edule overri de—set the thermost at higher or lowe r for the current program schedul e. • Permanent schedu le override—set th e th[...]

69-1538 8 Special Energy Saving Features The EnergyPro™ Thermostat supports Demand Response and Price Response Programs from your Energy Utility . If you have any questions concerni ng the application of this thermostat or these special programs and features, please contact your local Energy Utility . Demand Response If your utility offers a Dema[...]

9 69-1538 Pre-Cool and Pre-Heat Y our Energy Utility may decide to use the Pre-cool /Pre-heat featur e to slightly raise or lower your home temp erature setting immediately prior to a Demand Resp onse event to minimize the effect on your comfort. When the Pre-heat or Pre-cool option is in effect, the thermost at displays PrE. Price Response If your[...]

69-1538 10 Display shows Critical rate in effect. Display shows High rate in effect. Display shows Medium rate in effect. Display shows Low rate in effect. Aut o System Fan Wake AM DST Cool Tue Room Set Program Set Day/Time Em Ht Aux Ht Critical M20906 Aut o System Fan Wake AM DST Cool Tue Room Set Program Set Day/Time Em Ht Aux Ht Hi M20903 Aut o [...]

1 1 69-1538 My Choice There may be times when you need to cancel an energy-saving ev ent such as De mand Response, Pre-heat or Pre-cool. Y o ur Energy Utility may offer a program that incorporates the My Choice feature. T o use My Choice and cancel an energy-saving event, press and hold Run Program key for three seconds until the thermostat display[...]

69-1538 12 even program the thermostat to return to your regular programming schedule on your last day of vacation so you are comfortable when you return and yet save ene rgy while you are away . SETTING THE CLOCK Setting Current Day and Time IMPORT ANT Always press keys with your fingertip or similar blunt tool. Sharp instruments like pens and pen[...]

13 69-1538 Mon = Monday , T ue = T u esday , Wed = W ednesday , Thu = Thursday , Fri = Friday , Sat = Saturday , Sun = Sunday . Press Day key to set current day . Example disp lay shows Tuesday . 3. Press T ime ∆ or Ti m e ∇ key until current time displays. T ap Set Current Day/T ime key to advance time in one-hour increment s. 4. Press Run Pro[...]

69-1538 14 Daylight Saving Time NOTE: If current time is Daylight Saving T ime, press Daylight T ime key to display “DST .” Press Daylight T ime key to set Daylight Saving Time. Pressing Daylight T iime key more than once in a five-minute period scrolls you through various time options (example: one -hour earlier or later with or without DST). [...]

15 69-1538 CAUTION Equipment Damage Hazard . Can cause permanent damage to the compressor or other equ ipment. T o avoid possible compressor d amage, allow compressor to remain off for five minutes before restarting. T o avoid possible equipment d amage, do not operate cooling when outside temperature is below 50°F (10°C). See equipment manufactu[...]

69-1538 16 Setting Fan Key Press Fan key until desired mode (On or Auto) displays: On: Fan operates conti nuously . Auto: Fan operates only whe n heating or cooling. Setting Temporary Temperatures Y ou can override the current schedule period to temporarily change the temperature setting until the next schedule period, or you can change and hold th[...]

17 69-1538 Press the Run Program key to cancel the temporary tempera ture setting before the designated time. After selecting a temporary setting, the display reads “T emporary” until cancell ed. Example display shows temporary heat setting of 70° at 6:00 AM. If  or  appears under temperature display , both heating and cooli ng setpoints[...]

69-1538 18 NOTE: The Display changes from setpoint to room temperature af ter approximately three seconds. 3. Press Run Program key to cancel hold. Press Hold T emp key once to display the thermostat in Hold mode. Example display shows temporary heat setting of 60°. Changing Temperatur e Setting Until a Designated Day and Period (Vacation Hold) 1.[...]

19 69-1538 IMPORT ANT T o cancel V acation Hold before desig- nated time, press Run Program key . 2. Press T ime ∆ or T i me ∇ until desired numb er of days (1 to 255 days) displays. Press T ime ∆ or T ime ∇ key to select number of vacation days. Example display shows 18 vacation days. 3. Press W ake, Leave, R eturn or Sleep key to select t[...]

69-1538 20 NOTE: Only the heating temper ature is used when System is set to Heat. Simila rly , only the coolin g temperatur e is used when System is set to Cool. The thermostat uses both heating and cooling temperatures when System is set to Auto. Press  increase or decrease  key to select a new Hold temperature. Example display shows tempor[...]

21 69-1538 Using the i (Information) Key The i (information) key provid es information at your fingertips in this sequence of key presses: • Outdoor temperature (if equipped). • Current setpoint of mode in use (Heat or Cool). • Setpoint of mode not currently in use. • Filter status. If filter status is expired, refer to Filter Indicator sec[...]

69-1538 22 If filter status is expired, press i key twice to display outdoor temper- ature. See Filter Indicator section for instructions on resetting filter indicator . Displaying Current Settings Press i key twice to check current temperature setpoint. Pr ess i key three times to check temperature setpoint of mode no t currently in use. Press i k[...]

23 69-1538 Filter Indicator Y our thermostat monitors the amount of time the fan is running and lets you know when to replace the filter , based on the number of fan run-time days you select. On expiration, thermostat displays “Filter .” One fan run-ti me day equa ls 24 fan ru n-time hours. (If fan is on only one- third of the time each day , i[...]

69-1538 24 Hold down Filter key to reset counter . 3. Press T ime ∆ or T i me ∇ until desired number of days display (0, 15, 30 , 60, 90, or 120). 4. Press Run Program key to return to normal operation. IMPORT ANT T o track time fan is running, you must select a setting other than 0 (0 means off). If setting is 0 days, display always shows “0[...]

25 69-1538 Heat Pump Fault Monitor LED lights red when heat pump failure is detected. Switch thermostat to Em. Ht. and contact you heat pump service com- pany . Heating with Em. Ht. is expensive, so act quickly . Successful Communication Indicator The thermostat periodically sends and receives messages. The small tria ngle right of the temperature [...]

69-1538 26 Program Periods: W AKE—The program period when you want the house at a comfortable temperature when you get up a nd while you get ready for work or school. (This is a higher te mperature during heating season and a coole r temper- ature during cooling season.) LEA VE—T he program period you can set for an energy saving temperature wh[...]

27 69-1538 Instructions: 1. Write the time you want for each program period. 2. Write the heating and cooling temp era- tures you want for each period. 3. Draw a circle around the fan operation you desire for each period. T a ble 1. 7-Day Preprogrammed Schedule. Day W AKE LEA V E RETURN SLEEP All Days TIME FA N H 70 (21) 6:00 AM AUTO C 78 (2.5) TIM[...]

69-1538 28 Customizing Your Own 7-Day Schedule T abl e 2. Y our 7-Day Schedule. Day W AKE LEA VE RETURN SLEEP SUN TIME FA N H AUTO C ON TIME FA N H AUTO C ON TIME FA N H AUTO C ON TIME FA N H AUTO C ON MON TIME FA N H AUTO C ON TIME FA N H AUTO C ON TIME FA N H AUTO C ON TIME FA N H AUTO C ON TUES TIME FA N H AUTO C ON TIME FA N H AUTO C ON TIME FA[...]

29 69-1538 THURS TIME FA N H AUTO C ON TIME FA N H AUTO C ON TIME FA N H AUTO C ON TIME FA N H AUTO C ON FRI TIME FA N H AUTO C ON TIME FA N H AUTO C ON TIME FA N H AUTO C ON TIME FA N H AUTO C ON SA T TIME FA N H AUTO C ON TIME FA N H AUTO C ON TIME FA N H AUTO C ON TIME FA N H AUTO C ON T able 2. Y our 7-Day Schedule. (Conti nued) Day W AKE LEA V[...]

69-1538 30 Programming the First Day T o modify the preprogrammed schedul e, start by programming the W ake time and temper- ature and fan operation for any one day . 1. Press the W ake key . Press W ake key to enter program mode. Example display shows 6:00 AM Tuesday with Heat set to 70°F . 2. Press Day key until desired day displays. Press Day k[...]

31 69-1538 Press the T ime ∆ or Time ∇ key to select time W ake period will begin. Example display shows Wake period will begin at 6:30 AM. The program times are in fifteen-minute intervals; for example, 8:00, 8:15, 8:30. 4. Press  increase or decrease  until desired W ake temperature displays. Press  increase or decrease  key to se[...]

69-1538 32 5. Press Fan key to modify fan operation. Selecting Auto means fan runs only when heating or cooling equ ipment is operat- ing. Select ing On means fa n runs contin - uously for entire schedule period. 6. Press Heat/Cool Settings key to make selections for opposite system setting (either Heat or Cool). Press Heat/Cool Settings key to sel[...]

33 69-1538 7. Press  increase or decrease  key until desired temperature setpoint displ ays. Press  increase or decrease  to select cooling W ake temperature. Example display shows cooling W ake period set for 76°. 8. Press Leave, Return or Sleep and repeat steps 3 through 6 to program entire day . The day (first day of a 7-day schedul[...]

69-1538 34 1. Press W ake, Leave, Return o r Sleep key to enter program mo de. 2. Press Day key to select the day to copy from. Press Day key to select the day schedule to copy . Example display shows thermostat in program mode with Monday ready to be copied. 3. Press Copy key . Press Copy key to copy a day schedule into memory . Example display sh[...]

35 69-1538 Press Day key again to select the day to copy to. Example display shows Monday and Wednesday . Because Monday was alre ady selected, Monday schedule will be copied to Wednesday . 5. Press Copy key . Press Copy key again to complete copy command. Example display shows “donE” . Monday schedule was successfully copied to Wednesday (Mond[...]

69-1538 36 Clearing a Program Period Thermostat must be in program mode to use clear feature. Go to step 2 if thermostat is already in program mode (Set Program displays in upper left corner . 1. Press Leave, Return or Sleep key to enter program mode. Press Leave, Return, or Sleep to enter the program mode. Example display shows 8:00 AM on Monday i[...]

37 69-1538 3. Press and hold Leave, Return or Sleep key until start time and temperature set- ting clear (approximately three seconds). Press and hold Leave, Return or Sleep key to clear the period for that day . Example display shows Saturday Leave period cleared. NOTE: W ake cannot be cleared. Y ou do not have to program a replacement time for th[...]

69-1538 38 REPLACING THE BATTERIES (T8665C ONLY) IMPORTANT Three AA alkaline batteries are included with the thermostat. Batteries must be installed for programmin g and operation of the thermostat and the heating/cooling system. 1. Install batteries in wallplate so positive terminals all point up (as shown ). 2. If the thermostat is already mounte[...]

39 69-1538 3. When batteries are running low , a REPL BA T message flashes for one to two months before batteries run out com- pletely . Replace batteries a s soon as pos- sible after message flashes. MPORTANT Although thermostat has a low battery indicator , replace batteries yearly to prevent leakage and thermostat and heating/cooling system from[...]

69-1538 40 Always use fresh alkaline batteries. Non - alkaline batteries do not last as long and can leak, causing damage to the thermostat and wall surface. ADAPTIVE INTELLIGENT RECOVERY™ CONTROL Y our new thermostat is so smart, it’ s almost human. Y ou p erceive temperature from a variety of sources, not only from the air in the room, but al[...]

41 69-1538 How do you know when the system is in recovery? The thermostat displays “Recovery” whenever the thermostat activates Adaptive Intelligent Recovery™ control. (See display .) “Recovery” displays during reco very time from Sleep to W ake and from Leave to Return. After installation or new schedule programming, your thermostat lear[...]

69-1538 42 Fig. 3. Explan ation of Adaptive In telligent Recovery™ control. At 4:00 AM Recovery Begins At 5:00 AM Recovery Continues At 6:00 AM Recovery Continues At 7:00 AM System Operating in Comfort Mode ENERGY SAVINGS PERIOD RECOVERY FROM ENERGY SAVINGS COMFORT PERIOD TIME TEMPERATURE T HE THERMOSTAT USES THE SAME SCHEME TO RETURN GRADUALLY T[...]

43 69-1538 TROUBLESHOOTING (TABLE 3) T ab le 3. T roubleshoo ting. Symptom Possible Cause Action Display does not come on. Thermostat is not being powered. Check if the thermostat is mounted and latched on the wallplate—mount and latch the thermostat on the wallplate. Check if the circuit breaker is tripped— reset the circuit breaker . Check if[...]

69-1538 44 T emperature setting does not change (Example: cannot set the heating higher or the cooling lower). The upper or lower temperature limits were reached. Check that the temperature setpoints are Heating: 40 to 90° (4.5 to 32 °C). Cooling: 45 to 99° (7 to 37 °C). T ab le 3. T rou bleshooting . (Continued) Symptom Possible Cause Action[...]

45 69-1538 Heating does not come on. The thermostat is part of a Demand Response event. No power to thermostat. System selection is not set to Heat. Heating setpoint is below room temperature. If thermost at indicates SA VE, wait until energy saving event is complete. T o cancel energy saving event, if available, press and hold Run Program. Check t[...]

69-1538 46 Cooling does not come on The thermostat is part of a Demand Response event. No power to thermostat. System selection is not set to Cool. Cooling setpoint is above room temperature. If thermost at indicates SA VE, wait until energy saving event is complete. T o cancel energy saving event, if available, press and hold Run Program. Check th[...]

47 69-1538 System on indicator— for heat; for cool— is lit, but no warm or cool air is coming from the registers. Heating/cooling equipmen t turns on the fan when the equipment has reached the preset time or tempera ture. W a it a minute af ter seeing the or and then check the registers. Heat Pump Fault Monitor LED is lighted. The heat pump sig[...]

69-1538 48 Room temperature is cooler than current setting and air conditioner is still running. Thermostat is operating in Pre-cool mode. If the thermostat displays PrE, wait until the Pre-cool event is complete. T o cancel, press and hold Run Program for three seconds until DONE is displayed. If PrE does not display , contact your lo cal heating [...]

49 69-1538 1COM is displayed. The thermostat is unable to communicate with Ene rgy Utility management system controller . Contact your energy utility for assistance. Heat or cool turns on before programmed time. Adaptive I ntelligent Recovery™ control is on. Adaptive Intelligent Recovery™ control brings the heat or cool on early to meet the tem[...]

69-1538 50 WARRANTY Honeywell warrant s this product, exclu ding 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 rep[...]

51 69-1538 THIS W ARRANTY IS THE ONL Y EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT . THE DURA TION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHA NT ABILITY AND FITNESS FOR A P ARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE YEAR DURA TION OF THIS WARRANTY . Some states do not allow limit ations on how long an implied warranty l[...]

69-1538 G .H. 04-03 www .honeywell.com/yourhome Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. Automation and Control Solutions Honeywell International Inc. Hone ywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9[...]