T8665C,D,E EnergyPro™ Thermostat OWNER’S GUIDE ® U.S. Registered Trademark Copyright © 2003 Honeywell International Inc.
Contents Introduction .................................................................................................................................... Using this Guide ............................................................................................................................ Thermostat Features ..................................................................................................................... Operating Your Thermostat ...................................................
INTRODUCTION Although the EnergyPro™ Thermostat can be used standalone, it is intended to be part of a communicating system provided by your Energy Utility. 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.
USING THIS GUIDE Keyboard and Display Description The T8665C,D,E Communicating Thermostat uses two-way radio frequency (RF) to send and receive information. This information can be used to make changes to your thermostat settings, or settings from your Energy Utility. Keyboard The keyboard is located behind the thermostat cover. Three frequently used keys: increase , decrease , and i key are located next to the display. See Fig. 1.
TIME / TIME SETS TIME FORWARD OR BACK WAKE SET WAKE TIMES AND TEMPERATURES LEAVE SET LEAVE TIMES AND TEMPERATURES DIGITAL DISPLAY DECREASE LOWERS TEMPERATURE SETTING SET CURRENT DAY/TIME SETS CURRENT DAY AND TIME INFORMATION DISPLAYS CURRENT HEAT/COOL TEMPERATURE SETTING, FILYER STATUS, AND OUTDOOR TEMPERATURE (WHEN INSTALLED). RUN PROGRAM RETURNS THERMOSTAT TO NORMAL OPERATING MODE. PRESS AND HOLD TO CANCEL ENERGY SAVINGS AND PRE-HEAT/PRE-COOL MODES (MY CHOICE).
SHOWS ACTIVE PRICE TIER (HIGH, MEDIUM OR LOW) SHOWS CRITICAL PRICE TIER IS ACTIVE SHOWS VACATION HOLD DURATION SHOWS FILTER TIMER EXPIRED (TIME TO REPLACE FILTER) SHOWS CURRENT DAY OR DAYS BEING PROGRAMMED SHOWS CURRENT PROGRAM PERIOD OR PERIOD BEING PROGRAMMED DISPLAYS EITHER CURRENT TIME OF DAY OR PROGRAM TIMES SHOWS WHEN THERMOSTAT IS IN THE PROGRAMMING MODE SHOWS THERMOSTAT IS IN THE SET CURRENT DAY/TIME MODE SHOWS TEMPERATURE SETTING CHANGED FOR THIS PROGRAM PERIOD HiMedLo Set Program Set Day/Time
THERMOSTAT FEATURES • Set the filter indicator (0, 15, 30, 60, 90, or 120 days) to remind you to change the filter. • Information at the press of a button—use the i (information) key to see the outdoor temperature (C7089B Outdoor Temperature Sensor optional accessory), the current setpoints, or the filter status. • Daylight Time key for quick time changes between Daylight and Standard time. • Backlit display for improved readability (press any key to activate).
Special Energy Saving Features of this thermostat or these special programs and features, please contact your local Energy Utility. The EnergyPro™ Thermostat supports Demand Response and Price Response Programs from your Energy Utility. If you have any questions concerning the application of this thermostat or these special programs and features, please contact your local Energy Utility.
Pre-Cool and Pre-Heat Price Response Your Energy Utility may decide to use the Pre-cool /Pre-heat feature to slightly raise or lower your home temperature setting immediately prior to a Demand Response event to minimize the effect on your comfort. When the Pre-heat or Pre-cool option is in effect, the thermostat displays PrE.
Critical System Set Program Set Day/Time AM Em Ht Aux Ht Tue Wake Med Cool Room Em Ht Aux Ht Tue Wake Fan Auto DST System Set Program Set Day/Time AM Cool Room Fan Auto DST M20904 M20906 Display shows Critical rate in effect. Hi System Set Program Set Day/Time AM Em Ht Aux Ht Tue Wake Display shows Medium rate in effect. Room DST System Lo Set Program Set Day/Time AM Cool Em Ht Aux Ht Tue Wake Fan Auto Cool Room DST M20903 Auto M20905 Display shows Low rate in effect.
My Choice If the utility does not offer the My Choice feature, pressing and holding the Run Program key will not cancel the energy-saving event. Call your Energy Utility provider for Run Program further information. There may be times when you need to cancel an energy-saving event such as Demand Response, Pre-heat or Pre-cool. Your Energy Utility may offer a program that incorporates the My Choice feature.
1. 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 energy while you are away. Press Set Current Day/Time key. PM SETTING THE CLOCK Mon M14580 Press Set Current Day/Time key to show information displayed. Setting Current Day and Time Setting the clock can be controlled as part of the system using two-way RF communication; then the time is automatically updated.
Tap Set Current Day/Time key to advance time in one-hour increments. Mon = Monday, Tue = Tuesday, Wed = Wednesday, Thu = Thursday, Fri = Friday, Sat = Saturday, Sun = Sunday. 70 80 60 90 70 80 90 60 60 4. 90 90 60 70 80 70 80 Press Run Program key to return to normal operation. Run Program PM AM M14581 Press Day key to set current day. Example display shows Tuesday. 3. Press Time ∆ or Time ∇key until current time displays. Press Time ∆ or Time ∇ key to set current time.
Daylight Saving Time Pressing Daylight Tiime 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). Pressing Daylight Time six times in a five-minute period returns you to your original setting. 70 80 90 60 Time 90 60 70 80 NOTE: If current time is Daylight Saving Time, press Daylight Time key to display “DST.
Heat: The thermostat controls the heating. CAUTION Off: Both the heating and cooling are off. Equipment Damage Hazard. Can cause permanent damage to the compressor or other equipment. To avoid possible compressor damage, allow compressor to remain off for five minutes before restarting. Cool: The thermostat controls the cooling. Auto: The thermostat automatically changes between heating and cooling operation, depending on the indoor temperature.
Setting Fan Key Changing Temperature to Temporary Setting Until Next Schedule Period Press Fan key until desired mode Fan (On or Auto) displays: On: Fan operates continuously. Auto: Fan operates only when heating or cooling. Press increase or decrease key until the desired temperature setpoint displays.
If or Run Program 60 Temporary System Heat AM 90 60 70 80 70 80 90 Press the Run Program key to cancel the temporary temperature setting before the designated time. appears under temperature display, both heating and cooling setpoints are being adjusted. Tapping or key changes both heat and cool setpoints one degree. (Press i key after setpoint is reached to verify setpoints.
Changing Temperature Setting Until a Designated Day and Period (Vacation Hold) NOTE: The Display changes from setpoint to room temperature after approximately three seconds. 3. Press Run Program key to cancel hold. Setting Hold Temp 1. Press Hold Temp key twice. System Heat Setting Days Fan Auto Wake M14565 Press Hold Temp key once to display the thermostat in Hold mode. Example display shows temporary heat setting of 60°.
IMPORTANT To cancel Vacation Hold before designated time, press Run Program key. 3. Press Wake, Leave, Return or Sleep key to select the period the Hold ends. Wake 2. Press Time ∆ or Time ∇ until desired number of days (1 to 255 days) displays. Sleep Return System Heat Setting System Heat Fan Hold for Auto Days Wake Leave Fan Heat M14571 In this example, the Hold ends after the 18th day at the beginning of the Return period.
NOTE: Only the heating temperature is used when System is set to Heat. Similarly, only the cooling temperature is used when System is set to Cool. The thermostat uses both heating and cooling temperatures when System is set to Auto. 5. 6. 7. System Heat Fan Auto M14572 Press increase or decrease key to select a new Hold temperature. Example display shows temporary heat setting of 55°. 69-1538 20 Press Heat/Cool Settings key Heat/Cool Settings to change between heat and cool settings.
Using the i (Information) Key If filter status is expired, refer to Filter Indicator section. Sequence of i key presses is: • Filter status. • Outdoor temperature (if equipped). • Current setpoint of mode in use (Heat or Cool). • Setpoint of mode not currently in use. System Em Heat AM Fan Tue Wake Room DST INFORMATION KEY Auto Displaying Outdoor Temperature M20896 The i (information) key provides information at your fingertips in this sequence of key presses: • Outdoor temperature (if equipped).
If filter status is expired, press i key twice to display outdoor temperature. See Filter Indicator section for instructions on resetting filter indicator. 60 90 90 60 70 80 70 80 Cool Displaying Current Settings M20898 Press i key twice to check current temperature setpoint. Press i key three times to check temperature setpoint of mode not currently in use. Press i key twice to display current setpoint. Example display shows cooling setpoint of 75°.
Filter Indicator Setting or Resetting Filter Indicator Your thermostat comes preset to a 30-day setting. To change this setting or reset after filter expiration: 1. Press Filter key to enter Filter Filter mode. System AM Em Heat Filter Tue Wake Fan Room DST FILTER EXPIRATION INDICATOR Auto M20899 Your 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.
LED Indicators (T8665D Only) Setting Filter Hold down Filter key to reset counter. 3. 4. HEAT PUMP FAULT MONITOR LED Days M17762A Press Time ∆ or Time ∇ until desired number of days display (0, 15, 30, 60, 90, or 120). Press Run Program key to Run Program return to normal operation. M19467 Two LED indicators located on upper right of the thermostat indicate when a Heat Pump Fault Monitor or Equipment Monitor signal is sent to the thermostat from the system.
Heat Pump Fault Monitor LED lights red when heat pump failure is detected. Switch thermostat to Em. Ht. and contact you heat pump service comHEAT PUMP pany. Heating with Em. Ht. is expensive, so act quickly. Temporary System Heat AM Fan Mon Heat Auto M17763 PROGRAMMING YOUR THERMOSTAT Successful Communication Indicator The thermostat periodically sends and receives messages.
and a cooler temperature during cooling season and it follows the energy-saving LEAVE period. Program Periods: WAKE—The program period when you want the house at a comfortable temperature when you get up and while you get ready for work or school. (This is a higher temperature during heating season and a cooler temperature during cooling season.) SLEEP—The program period you set for an energy-saving temperature while you are sleeping.
3. Instructions: 1. Write the time you want for each program period. 2. Write the heating and cooling temperatures you want for each period. Draw a circle around the fan operation you desire for each period. Table 1. 7-Day Preprogrammed Schedule. Day All Days WAKE TIME FAN H 70 (21) 6:00 AM AUTO C 78 (2.5) LEAVE TIME FAN H 62 (16.5) RETURN 8:00 AM AUTO C 85 (29.5) 27 TIME FAN H 70 (21) 6:00 PM AUTO C 78 (25.5) SLEEP TIME FAN H 62 (16.
Customizing Your Own 7-Day Schedule Table 2. Your 7-Day Schedule.
Table 2. Your 7-Day Schedule.
Programming the First Day To modify the preprogrammed schedule, start by programming the Wake time and temperature and fan operation for any one day. 1. Press the Wake key. Setting Set Program System Heat AM Fan Wake Mon Wake Heat Auto M14588 System Heat Press Day key to select day to program. Example display shows Monday is selected and ready to program. AM Fan 3. Auto M14586 Press Wake key to enter program mode. Example display shows 6:00 AM Tuesday with Heat set to 70°F. 2.
Setting Set Program AM Fan Fan Mon Wake Heat System Heat Setting Set Program System Heat AM Mon Wake Auto Heat Auto M14590 M14589 Press the Time ∆ or Time ∇ key to select time Wake period will begin. Example display shows Wake period will begin at 6:30 AM. Press increase or decrease key to select temperature for Wake period. Example display hows heating Wake period set for 68°. The program times are in fifteen-minute intervals; for example, 8:00, 8:15, 8:30.
5. Press Fan key to modify fan Fan operation. Selecting Auto means fan runs only when heating or cooling equipment is operating. Selecting On means fan runs continuously for entire schedule period. Setting Set Program System Heat AM Fan Mon Wake Cool Auto M14591 6. Press Heat/Cool Settings key to make selections for opposite system setting (either Heat or Cool). 69-1538 Press Heat/Cool Settings key to select cooling system (if you previously set heating temperature). Current setting displays.
7. IMPORTANT Repeat steps 1 through 7 for each day of the week that has a different schedule from the first day. Or refer to Copying a Day section to copy any programmed day to another day. Press increase or decrease key until desired temperature setpoint displays. Setting Set Program System Heat AM Fan Cool 9. Auto M14592 Press increase or decrease to select cooling Wake temperature. Example display shows cooling Wake period set for 76°.
1. Press Wake, Leave, Return or Sleep key to enter program mode. Wake 2. Return Leave 3. Press Copy key. Copy Sleep Press Day key to select the day to copy from. Day Mon Setting Set Program System Heat AM M14594 Press Copy key to copy a day schedule into memory. Example display shows Monday schedule was coped into memory. Fan Mon Wake Heat Auto 4. M14590 Press Day key to select the day schedule to copy. Example display shows thermostat in program mode with Monday ready to be copied.
Mon Wed M14596 Press Copy key again to complete copy command. Example display shows “donE”. Monday schedule was successfully copied to Wednesday (Monday and Wednesday now have the same schedule). M14595 Press Day key again to select the day to copy to. Example display shows Monday and Wednesday. Because Monday was already selected, Monday schedule will be copied to Wednesday. 5. Press Copy key. NOTE: “donE” displays for two seconds before the normal display returns. Copy 6. 7.
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. Setting Set Program Fan Mon On 90 60 1. 90 60 70 80 70 80 Return Heat Leave M14597 Press Leave, Return, or Sleep to enter the program mode. Example display shows 8:00 AM on Monday in Leave period with Heat set for 62°. Press Leave, Return or Sleep key to enter program mode. Leave System Heat AM 2.
3. Press and hold Leave, Return or Sleep key until start time and temperature setting clear (approximately three seconds). You do not have to program a replacement time for the remaining periods; for example, Wake and Sleep. If you clear only Leave and Return periods for Saturday (or any day), thermostat remains in Wake period for all of Saturday until Sleep period. Setting Set Program 4. Sat Leave 5.
REPLACING THE BATTERIES (T8665C ONLY) WALLPLATE B IMPORTANT Three AA alkaline batteries are included with the thermostat. Batteries must be installed for programming and operation of the thermostat and the heating/cooling system. 1. 2. R O W Y G Day Install batteries in wallplate so positive terminals all point up (as shown).
MPORTANT Although thermostat has a low battery indicator, replace batteries yearly to prevent leakage and thermostat and heating/cooling system from shutting down due to lack of thermostat battery power. 4. M16424 When batteries are running low, a REPL BAT message flashes for one to two months before batteries run out completely. Replace batteries as soon as possible after message flashes.
reads both the temperature of the wall and in the air, and responds to temperature changes as little as one degree Fahrenheit, so room temperature is more likely to feel right to you and your family. Always use fresh alkaline batteries. Nonalkaline batteries do not last as long and can leak, causing damage to the thermostat and wall surface. ADAPTIVE INTELLIGENT RECOVERY™ CONTROL The thermostat acts like a computer.
adjusts the next day’s recovery start time accordingly. After four to eight days, the thermostat has adjusted to local weather, your lifestyle, the construction of your home, and your heating and cooling system. 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 recovery time from Sleep to Wake and from Leave to Return.
At 7:00 AM System Operating in Comfort Mode System Heat AM TEMPERATURE At 6:00 AM Recovery Continues Fan Mon Wake Room Auto System Heat AM Fan At 5:00 AM Recovery Continues Room Mon Sleep Recovery System Heat AM Auto 1 Fan Room Mon At 4:00 AM Recovery Begins Sleep Recovery Auto System Heat AM Fan Room Mon Sleep Recovery Auto ENERGY SAVINGS PERIOD RECOVERY FROM ENERGY SAVINGS TIME COMFORT PERIOD THE THERMOSTAT USES THE SAME SCHEME TO RETURN GRADUALLY TO LOWER COMFORT TEMPERAT
TROUBLESHOOTING (TABLE 3) Table 3. Troubleshooting. Symptom Display does not come on. Possible Cause Action 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 the fuse at the fuse box is blown—replace the fuse. Check if System switch at equipment is in the Off position—set to On position.
Table 3. Troubleshooting. (Continued) Symptom Temperature setting does not change (Example: cannot set the heating higher or the cooling lower). 69-1538 Possible Cause Action 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).
Table 3. Troubleshooting. (Continued) Symptom Heating does not come on. Possible Cause Action 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. 45 If thermostat indicates SAVE, wait until energy saving event is complete. To cancel energy saving event, if available, press and hold Run Program. Check that setpoint is above room temperature. Check if circuit breaker is tripped—reset circuit breaker.
Table 3. Troubleshooting. (Continued) Symptom Cooling does not come on Possible Cause Action 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. 69-1538 46 If thermostat indicates SAVE, wait until energy saving event is complete. To cancel energy saving event, if available, press and hold Run Program. Check that setpoint is below room temperature.
Table 3. Troubleshooting. (Continued) Symptom Possible Cause Action System on indicator— for heat; for cool— is lit, but no warm or cool air is coming from the registers. Heating/cooling equipment turns on the fan when the equipment has reached the preset time or temperature. Wait a minute after seeing the or and then check the registers. Heat Pump Fault Monitor LED is lighted. The heat pump signaled the thermostat to indicate a problem. Move the System switch to Em. Ht setting (heat pump only).
Table 3. Troubleshooting. (Continued) Symptom Possible Cause Action 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. To cancel, press and hold Run Program for three seconds until DONE is displayed. If PrE does not display, contact your local heating contractor or Energy Utility. Outdoor temperature is not displayed or is incorrect.
Table 3. Troubleshooting. (Continued) Symptom Possible Cause Action 1COM is displayed. The thermostat is unable to communicate with Energy Utility management system controller. Contact your energy utility for assistance. Heat or cool turns on before programmed time. Adaptive Intelligent Recovery™ control is on. Adaptive Intelligent Recovery™ control brings the heat or cool on early to meet the temperature set for the programmed period. See Adaptive Intelligent Recovery™ control section.
WARRANTY Honeywell Return Goods Dock 4 MN10-3860 1885 Douglas Drive North Golden Valley, MN 55422 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.
CUSTOMER ASSISTANCE 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.
Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 69-1538 G.H. 04-03 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Scarborough, Ontario M1V 4Z9 Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. www.honeywell.
