Honeywell Thermostat T8665A User Manual

1 69-1536–3USER’S GUIDET8665A Chronotherm® IVWireless Thermostat69-1536-3

10 69-1536–3ADAPTIVE INTELLIGENTRECOVERYTM CONTROLYour new thermostat is so smart, it’s almost human.You perceive temperature from a variety of source

11 69-1536–3After installation or new schedule programming, yourthermostat learns from experience. Each day itchecks how closely it hit the recovery t

12 69-1536–3Fig. 4. Explanation of Adaptive Intelligent RecoveryTM control.At 4:00 AMRecovery BeginsAt 5:00 AMRecovery ContinuesAt 6:00 AMRecovery Con

13 69-1536–3OPERATING YOUR THERMOSTATYour new thermostat saves energy and keeps youcomfortable at the same time. By now you may bewondering how to pro

14 69-1536–3Setting the System KeyPress the System key until the desiredsystem (Heat, Off, Cool, or Auto) displays.Heat: The thermostat controls the h

15 69-1536–3Setting Temporary TemperaturesYou can override the current schedule period to temporarily change the temperature setting until the next sc

16 69-1536–3Press the Run Program key to cancel the temporarytemperature setting before the designated time.RunProgramM14564MonSystemFanHeatAutoAMHeat

17 69-1536–3M14565SystemFanHeatAutoHeatSettingChanging and Holding Temperature Setting Indefinitely1. Press Hold Temp key once.2. Press increase ▲ or

18 69-1536–3Changing Temperature Setting Until a Designated Day and Period (Vacation Hold)Hold TempPress the Time or Time key to select th

19 69-1536–3Press Wake, Leave, Return or Sleep key to select theperiod the Hold ends.M14571SystemFan HeatAutoHold forHeatDaysSettingReturn4. Press inc

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20 69-1536–35. Press Heat/Cool Settings key to change between heat and cool settings.6. Press increase ▲ or decrease ▼ to adjust the temperature setti

21 69-1536–3Replacing the BatteriesThis thermostat uses three AA alkaline batteries. Batteries must be installed for programming and operation ofthe t

22 69-1536–32. Remove the thermostat by placing your thumbbetween the thermostat and wallplate andpulling the thermostat up and away as shown.M16424If

23 69-1536–3Using the (Information) KeyThe (information) key provides information at yourfingertips. The sequence of key presses is:• Curr

24 69-1536–3Display or Reset Filter Timer Settings2. Press the Timer ▲ key to reset the timer.3. Press the Run Program key.Note: You can view the numb

25 69-1536–3SETTING THE CLOCKSetting Current Day and TimeOn initial power up or after an extended power loss, “1:00 PM”flashes on the display until a

26 69-1536–33. Press Time or Time key until the current time displays.Tap the Set Current Day/Time key to advancethe time in one-hour incr

27 69-1536–3Daylight Saving TimeNOTE: If the current time is Daylight Saving Time, pressDaylight Time key to display “DST.”DaylightTimeM14583Set Day/T

28 69-1536–3PROGRAMMING YOUR THERMOSTAT7-Day Program and OperationYour thermostat is 7-day programmable. 7-day programming means you can set your ther

29 69-1536–37-Day Preprogrammed ScheduleYour thermostat is preprogrammed with the schedule shown in Table 1 (same schedule for all days of the week).Y

3 69-1536–3CONTENTSUSING THIS GUIDE ...

30 69-1536–3Customizing Your Own 7-Day ScheduleTable 2. Your 7-Day Schedule.WAKE LEAVE RETURN SLEEPSUNDAY TIMEFAN AUTO ONH CTIMEFAN AUTO ONH CTIME

31 69-1536–3About Power Outages…Don’t worry! Your thermostat retains the schedule (preprogrammed or your own) for the life of theproduct. The time and

32 69-1536–31. Press the Wake key.M14586Set ProgramWakeSystemFan HeatAutoAMHeatTueSettingPress the Wake key to enter the program mode. Exampledisplay

33 69-1536–33. Press Time or Time key until the desired Waketime displays.The program times are in fifteen-minute intervals;for example, 8

34 69-1536–35. Press Fan key to modify fan operation. Selecting Auto means the fan runs only when theheating or cooling equipment is operating. Select

35 69-1536–37. Press increase ▲ or decrease ▼ key until the desiredtemperature setpoint displays.M14592Set ProgramMonWakeSystemFanHeatAutoAMCoolSettin

36 69-1536–3Copying a DayThe thermostat must be in the program mode to use the copy feature. Go to step 2 if the thermostat isalready in the program m

37 69-1536–33. Press Copy key.Press Copy key to copy a day schedule into memory. Exampledisplay shows Monday schedule was copied into memory.DayM1459

38 69-1536–36. Repeat steps, as necessary, for all the periods and days desired.7. Press Run Program key to return to normal operation.5. Press Copy k

39 69-1536–32. Press Day key until the desired day displays.Clearing a Program PeriodThe thermostat must be in the program modeto use the clear featur

4 69-1536–3Contents (Cont)Using the (Information) Key ...

40 69-1536–3You do not have to program a replacement time for the remaining periods; for example, Wake andSleep. If you clear only the Leave and Retur

41 69-1536–3TROUBLESHOOTINGcontinuedSymptom Possible Cause ActionDisplay does notcome on.Thermostat is not beingpowered.• Check if the batteries are c

42 69-1536–3Troubleshooting (Cont)Symptom Possible Cause ActionCooling does notcome on.System selection is not set to Cool. Cooling setpoint isabove

43 69-1536–3WARRANTYHoneywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and

44 69-1536–3Warranty (Cont)THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIEDWARRANTIES, INCLUDIN

45 69-1536–3CUSTOMER ASSISTANCEAfter reading this guide, if you have any questions about the operation of your thermostat, please contact theHoneywell

46 69-1536–3FCCID: CFS8DL5800STATCANADA: 1748A 12111This device complies with Part 15 of the FCC Rules. Operation is subject to the following two cond

69-1536–3 G.H. Rev. 11-02 Printed in U.S.A.Automation and Control SolutionsHoneywell1985 Douglas Drive NorthGolden Valley, MN 55422Honeywell Li

5 69-1536–3USING THIS GUIDEThe T8665A is a multi-functional thermostat. This means it can be used in single or multi-zone applications.The following s

6 69-1536–3FEATURES• Adaptive Intelligent RecoveryTM Control for comfortand energy savings.• Customize the program schedule—program yourown schedule t

7 69-1536–3KEYBOARD AND DISPLAY DESCRIPTIONKeyboardThe keyboard is located behind the thermostat cover. Three frequently used keys, increase ▲ or decr

8 69-1536–3Fig. 1. Thermostat keyboard description.M20146TimeSet ProgramRunProgramHold TempSet CurrentDay/TimeDayHeat/CoolSettingsWakeFanSystemCopyDay

9 69-1536–3Fig. 2. Example of thermostat display.AutoSystemFanOffAutoWakeMonRoomAMRecoveryHold forFilterDaysOnDSTCoolTueWedThuFriSatSunLeave Return Sl