Page 3 - CONTENTS
3 69-1332—3 CONTENTS USING THIS GUIDE .......................................................................................................................................... 5 FEATURES ...................................................................................................................
Page 5 - USING THIS GUIDE; pump with auxiliary heat.
5 69-1332—3 USING THIS GUIDE The T8635L is a multi-functional thermostat. This means it can be used in several different ways such as singleor multi-zone applications, conventional furnaces or heat pump equipment. The following symbols will help you identify the features that apply to your system: –...
Page 6 - FEATURES
6 69-1332—3 FEATURES • Adaptive Intelligent Recovery™ Control for comfortand energy savings. • Customize the program schedule—program yourown schedule to fit your needs. • Temporary schedule override—set the thermostathigher or lower for the current program schedule. • Permanent schedule override—se...
Page 7 - KEYBOARD AND DISPLAY DESCRIPTION; Keyboard; or decrease; Display
7 69-1332—3 KEYBOARD AND DISPLAY DESCRIPTION Keyboard The keyboard is located behind the thermostat cover. Three frequently used keys, increase ▲ or decrease ▼ and , are located next to the display. See Fig. 1. Display The thermostat displays important information such as day, time, schedule period,...
Page 9 - Set Program Set Day/Time
9 69-1332—3 Fig. 2. Example of thermostat display. Auto System Fan Off Auto Wake Mon Room AM RecoveryHold forFilter Days On DST Cool TueWedThuFriSatSun Leave Return Sleep Set Program Set Day/Time Wait Temporary Setting Em Heat M17756 DISPLAYS EITHER CURRENTTIME OF DAY OR PROGRAM TIMES SHOWS THERMOST...
Page 10 - at night to 70
10 69-1332—3 ADAPTIVE INTELLIGENTRECOVERY™ CONTROL Your new thermostat is so smart, it’s almost human.You perceive temperature from a variety of sources,not only from the air in the room, but also from yoursurrounding walls, windows and furnishings. Humansfeel differences in temperature as slight as...
Page 11 - Optimum Comfort and Energy Savings
11 69-1332—3 After installation or new schedule programming, yourthermostat learns from experience. Each day itchecks how closely it hit the recovery target (forexample, 70 ° at 6:00 AM) and adjusts the next day’s recovery start time accordingly. After four to eightdays, the thermostat has adjusted ...
Page 12 - Fig. 4. Explanation of Adaptive Intelligent RecoveryTM control.
12 69-1332—3 At 4:00 AMRecovery Begins At 5:00 AMRecovery Continues At 6:00 AMRecovery Continues At 7:00 AM System Operating in Comfort Mode ENERGYSAVINGSPERIOD RECOVERY FROM ENERGY SAVINGS COMFORTPERIOD TIME TEMPERATURE THE THERMOSTAT USES THE SAME SCHEME TO RETURN GRADUALLY TO LOWER COMFORT TEMPER...
Page 13 - OPERATING YOUR THERMOSTAT; Setting System and Fan Keys; CAUTION; facturer instructions.
13 69-1332—3 OPERATING YOUR THERMOSTAT Your new thermostat saves energy and keeps youcomfortable at the same time. By now you may bewondering how to program your thermostat and howto use some more time and energy-saving features. First, let’s look at features you’ll be using often, likesetting the S...
Page 14 - Setting the System Key; Auto is not available when used with zoning.; Setting the Fan Key
14 69-1332—3 Setting the System Key Press the System key until the desiredsystem (Heat, Off, Cool, or Auto) displays. Heat: The thermostat controls the heating.Off: Both the heating and cooling are off.Cool: The thermostat controls the cooling.Auto: The thermostat automatically changes between heati...
Page 15 - Setting Temporary Temperatures; Press increase
15 69-1332—3 Setting Temporary Temperatures You can override the current schedule period to temporarily change the temperature setting until the next scheduleperiod, or you can change and hold the temperature setting indefinitely. You can also change the temperature settinguntil a designated day and...
Page 16 - If
16 69-1332—3 Press the Run Program key to cancel the temporarytemperature setting before the designated time. Run Program M14564 Mon System Fan Heat Auto AM Heat Temporary After selecting a temporary setting, the display reads “Temporary” until canceled. Example display shows temporary heat setting ...
Page 17 - Changing and Holding Temperature Setting Indefinitely
17 69-1332—3 M14565 System Fan Heat Auto Heat Setting Changing and Holding Temperature Setting Indefinitely 1. Press Hold Temp key once. 2. Press increase ▲ or decrease ▼ to change the tempera- ture setpoint, if desired. NOTE: The display changes from the setpoint to theroom temperature after approx...
Page 18 - Hold for; IMPORTANT; or Time
18 69-1332—3 Changing Temperature Setting Until a Designated Day and Period (Vacation Hold) Hold Temp Press the Time or Time key to select the number of vacationdays. Example display shows 18 vacation days. TIME M14833 Wake System Fan Heat Auto Hold for Heat Days Setting ZONING M14834 Wake System Fa...
Page 19 - to adjust the tempera-
19 69-1332—3 Press Wake, Leave, Return or Sleep key to select theperiod the Hold ends. M14571 System Fan Heat Auto Hold for Heat Days Setting Return 4. Press increase ▲ or decrease ▼ to adjust the tempera- ture setting, if desired. NOTE: Only the heating temperature is used whenthe System is set to ...
Page 21 - Displaying Outdoor Temperature; Press
21 69-1332—3 Using the (Information) Key The (information) key provides information at yourfingertips. The sequence of key presses is:• Outdoor temperature (if equipped). • Current setpoint of mode in use (Heat or Cool). • Setpoint of mode not currently in use. • Filter status. If the filter status ...
Page 22 - Displaying Current Settings
22 69-1332—3 Displaying Current Settings Press key twice to check the current temperature setpoint. Press key three times to check the tempera-ture setpoint of the mode not currently in use. Without outdoor temperature sensor, press key once to display current setpoint; press keytwice for opposite s...
Page 23 - Filter Indicator; Setting or Resetting Filter Indicator; Press Filter key to enter the Filter mode.
23 69-1332—3 Filter Indicator Your thermostat monitors the time the fan is runningand lets you know when to replace the filter, basedon the number of fan run-time days you select. Uponexpiration, the thermostat displays “Filter” and thegreen LED lights (on the top right of the thermostat). One fan r...
Page 24 - Press and hold the Filter key for at least three seconds; to reset the fan run time.; Press Run Program key to return to normal operation.
24 69-1332—3 2. Press and hold the Filter key for at least three seconds to reset the fan run time. Hold down the Filter key to reset the counter. 3. Press Time or Time until the desired number of days displays (0, 15, 30, 60, 90, or 120 ). 4. Press Run Program key to return to normal operation. IMP...
Page 25 - LED Indicators; The LED indicators light on all thermostats.; Remote OverrideTemperature Indicator; displayed and “Temporary” flashes.
25 69-1332—3 LED Indicators Two light emitting diode (LED) indicators are located on the upperright side of the thermostat. The LED indicators are clear untillighted. When the right filter expiration LED indicator lights(green), see the Filter Indication section; when the heat pumpcheck LED indicato...
Page 26 - SETTING THE CLOCK; Setting Current Day and Time
26 69-1332—3 SETTING THE CLOCK Setting Current Day and Time Seting the time and day at one thermostat automatically sets the time and day on all thermostats. IMPORTANT Always press the keys with your fingertip or similar blunt tool. Sharp instruments like pens and pencilpoints can damage the keyboar...
Page 28 - Daylight Saving Time
28 69-1332—3 Daylight Saving Time NOTE: If the current time is Daylight Saving Time, pressDaylight Time key to display “DST.” Daylight Time M14583 S e t D a y / T i m e AM DST Tue Press Daylight Time key to set Daylight Saving Time. Pressing Daylight Time key more than oncewithin a five minute perio...
Page 29 - PROGRAMMING YOUR THERMOSTAT; -Day Program and Operation; LEAVE
29 69-1332—3 PROGRAMMING YOUR THERMOSTAT 7-Day Program and Operation Your thermostat is 7-day programmable. 7-day programming means you can set your thermostat for four periods(Wake, Leave, Return and Sleep) and up to eight temperatures (four Heat and four Cool) for each day of theweek. Each day can...
Page 30 - -Day Preprogrammed Schedule; WAKE
30 69-1332—3 7-Day Preprogrammed Schedule Your thermostat is preprogrammed with the schedule shown in Table 1 (same schedule for all days of the week).You may keep this schedule or develop your own. Before starting the programming procedure, use Table 2 toplan your schedule. Instructions: 1. Write t...
Page 31 - Customizing Your Own 7-Day Schedule
31 69-1332—3 Customizing Your Own 7-Day Schedule Table 2. Your 7-Day Schedule. WAKE LEAVE RETURN SLEEP SUNDAY TIMEFAN AUTO ON H C TIMEFAN AUTO ON H C TIMEFAN AUTO ON H C TIMEFAN AUTO ON H C MONDAY TIMEFAN AUTO ON H C TIMEFAN AUTO ON H C TIMEFAN AUTO ON H C TIMEFAN AUTO ON H C TUESDAY TIMEFAN AUTO ON...
Page 32 - Programming the First Day
32 69-1332—3 About Power Outages…Don’t worry! Your thermostat retains the schedule (preprogrammed or your own) for the life of theproduct. The time and day information is retained for a minimum of twenty minutes during apower outage. After a longer power outage, you may need to set the current time ...
Page 33 - Press Day key until the desired day displays.
33 69-1332—3 1. Press the Wake key. M14586 S e t P r o g r a m Wake System Fan Heat Auto AM Heat Tue Setting Press the Wake key to enter the program mode. Exampledisplay shows 6:00 AM on Tuesday with Heat set to 70 ° F. M14588 S e t P r o g r a m Mon Wake System Fan Heat Auto AM Heat Setting Day Pre...
Page 37 - Copying a Day; Press Day key to select the day to copy from.
37 69-1332—3 Copying a Day The thermostat must be in the program mode to use the copy feature. Go to step 2 if the thermostat isalready in the program mode (set program displays in the upper left corner). 1. Press Wake, Leave, Return or Sleep key to enter program mode. 2. Press Day key to select the...
Page 38 - Press Day key until the day to be copied to is displayed.
38 69-1332—3 3. Press Copy key. Press Copy key to copy a day schedule into memory. Example display shows Monday schedule was copied into memory. Day M14595 Mon Wed 4. Press Day key until the day to be copied to is displayed. Copy Press Day key again to select the day to copy to. Example display show...
Page 39 - Press Run Program key to return to normal operation.
39 69-1332—3 6. Repeat steps, as necessary, for all the periods and days desired. 7. Press Run Program key to return to normal operation. 5. Press Copy key. NOTE: “donE” displays for two seconds before thenormal display returns. Press the Copy key again to complete the copy command. Example display ...
Page 40 - Clearing a Program Period; Press Leave, Return or Sleep key to enter program
40 69-1332—3 2. Press Day key until the desired day displays. Clearing a Program Period The thermostat must be in the program modeto use the clear feature. Go to step 2 if the thermo-stat is already in the program mode(Set Program displays in upper left corner). 1. Press Leave, Return or Sleep key t...
Page 41 - Press Run Program key to return to normal operation.; Press and hold Leave, Return or Sleep key until the start; Wake cannot be cleared.
41 69-1332—3 You do not have to program a replacement time for the remaining periods; for example, Wake andSleep. If you clear only the Leave and Return periods for Saturday (or any day), the thermostatremains in the Wake period for all of Saturday until the Sleep period. 4. Repeat steps, as necessa...
Page 42 - TROUBLESHOOTING; continued; Symptom; Thermostat is not being powered.
42 69-1332—3 TROUBLESHOOTING continued Symptom Possible Cause Action Display does not comeon. 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 bre...
Page 43 - Refer to the Filter Indicator section.
43 69-1332—3 continued Troubleshooting (Cont) Symptom Possible Cause Action Cooling does not comeon. No power to the thermostat.System selection is not set to Cool. Cooling setpoint is aboveroom temperature. Check that setpoint is below room temperature.Check if the circuit breaker is tripped—reset ...
Page 44 - Contact installer or service technician.
44 69-1332—3 Troubleshooting (Cont) Symptom Possible Cause Action Outdoor temperature not displayed or isincorrect. Installer did not activate thisoption. Outdoor sensor is connectedincorrectly. Filter expired. Contact installer or service technician. Press key twice for outdoor temperature when fil...
Page 45 - WARRANTY
45 69-1332—3 WARRANTY Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for aperiod of one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the product is defective...
Page 47 - CUSTOMER ASSISTANCE
47 69-1332—3 CUSTOMER ASSISTANCE After reading this guide, if you have any questions about the operation of your thermostat, please visit theHoneywell website at www.honeywell.com/yourhome. For service, contact your local heating and coolingcontractor.
