T8665A Chronotherm IV Deluxe Programmable Wireless Thermostat APPLICATION The T8665 Chronotherm IV Wireless Thermostat provides electronic control of 24 Vac heating and cooling systems. It must be used with a W8665 Receiver INSTALLATION INSTRUCTIONS Module. Refer to Table 1 for a general description of the thermostat. The T8665A Thermostats are battery-
powered. T8665 System Changeover System Selection Fan Selection Comments Table 1. T8665A Thermostat Description. A Heat-Cool Automatic Heat-Off-Cool-Auto On-Auto System and fan selections are entered at keyboard. MERCURY NOTICE If this control is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash. Contact your local waste management authority for instructions regarding recycling and the proper disposal of the old thermostat. INSTALLATION Accessory Required (Not Included) Select one of the receiver modules for your application:
W8665A Receiver Module (RM) for single zone applications. W8665E RF Zone Panel for up to three zones. When Installing this Product... 1. Read these instructions carefully. Failure to follow the instructions can damage the product or cause a hazardous condition. 2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application. Installer must be a trained, experienced service technician. 4. After completing installation, use these instructions 3. to check out the product operation. Location Install the thermostat about 5 ft (1.5m) above the floor in an area with good air circulation at average temperature. See Fig. 1. Do not install the thermostat where it can be affected by:
drafts, or dead spots behind doors and in corners. hot or cold air from ducts. radiant heat from sun or appliances. concealed pipes and chimneys. unheated (uncooled) areas such as an outside wall behind the thermostat. Wallplate Installation The thermostat can be mounted horizontally on the wall or on a 2 in. x 4 in. wiring box. Position wallplate horizontally on the wall or on a 2 in. x 4 in. wiring box. 1. Position and level the wallplate (for appearance only). The thermostat functions correctly even when not level. 2. Use a pencil to mark the mounting holes. See Fig. 2. 3. Remove the wallplate from the wall and drill two 3/16 in. holes in the wall (if drywall) as marked. For firmer material such as plaster, drill two 7/32 in. holes. 4. Gently tap anchors (provided) into the drilled holes until flush with the wall. 5. Position the wallplate over the holes. 6. Loosely insert the mounting screws into the holes. 7. Tighten the mounting screws. U.S. Registered Trademark Copyright 2001 Honeywell
All Rights Reserved 69- 1535 WIRELESS THERMOSTAT Mounting Thermostat 1. Engage tabs at the top of the thermostat and wall-
plate. See Fig. 3. 2. Press lower edge of case to close and latch. YES NO NOTE: To remove the thermostat from the wall, first pull out at the bottom of the thermostat; remove top last. NO 5 FEET
[1.5 METERS]
NO M10106 A. ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE. B. PRESS LOWER EDGE OF CASE TO LATCH. M14628 Fig. 3. Mounting thermostat on wallplate. Using Thermostat Keys The thermostat keys are used to:
set current day and time. program times and setpoints for heating and cooling. temporarily override program temperatures display present setting, configure Installer Setup, check self-test, set the system operation, set the fan operation. See Fig. 4 for key locations. Fig. 1. Typical thermostat location. WALL WIRES THROUGH WALL WALL ANCHORS
(2) MOUNTING HOLES MOUNTING SCREWS M15044 Fig. 2. Mounting the wallplate. 69-1535 2
WIRELESS THERMOSTAT INCREASE TEMPERATURE SETTING OR SCROLL FORWARD THROUGH INSTALLER SETUP OPTIONS DECREASE TEMPERATURE SETTING OR SCROLL BACKWARD THROUGH INSTALLER SETUP OPTIONS DISPLAY INFORMATION SUCH AS PRESENT SETTINGS SET SLEEP TIMES AND SETPOINTS SELECT FAN OPERATION SELECT SYSTEM OPERATION INCREASE TIME SETTING OR SCROLL FORWARD THROUGH INSTALLER SETUP AND SYSTEM TEST SET WAKE TIMES AND SETPOINTS SET LEAVE TIMES AND SETPOINTS SET RETURN TIMES AND SETPOINTS SET CURRENT DAY AND TIME RETURN TO NORMAL OPERATIONS ENTER INDEFINITE OR TIMED HOLD MODE SET CURRENT OR PROGRAM DAY CHANGE BETWEEN DAYLIGHT SAVINGS AND STANDARD TIME Run Program Set Current Day/Time Time Set Program Wake Leave Return Sleep Hold Temp Day Heat/Cool Settings System Fan Daylight Time Copy COPY ONE PROGRAMMED DAY TO ANOTHER DAY DECREASE TIME SETTING OR SCROLL BACKWARD THROUGH INSTALLER SETUP AND SYSTEM TEST CHANGE BETWEEN HEATING AND COOLING SETPOINTS M20166 Fig. 4. T8665A key locations and descriptions. Setting up T8665A to Send Signal to W8665A,E Receiver Module The T8665A Thermostat must be set up to send signals to the W8665 Receiver Module. Use the W8665A Receiver for single-zone applications. Use the W8665E RF Zone Panel for up to three T8665A Thermostats for multizone applications. Single Zone Applications (one T8665A/
one W8665A) 1. Place the Zone 1 DIP switch on the W8665A Receiver to the On position. NOTE: Observe that the Zone 1 LED on the W8665 flashes. 2. Press the thermostat Fan key to the On position. The receiver accepts the message, stores identity and then stops flashing the Zone 1 LED. The ther-
mostat is now set up to send signals the W8665A Receiver. NOTE: The word On and a fan blade appear in the thermostat display to indicate the thermostat is calling for the fan to turn on. 3. Set the System and Fan keys to the desired loca-
tions. NOTE: At any time, if you want to stop the thermostat from sending signals to the W8665 Receiver, simply turn the DIP switch to the Off position. Follow the instructions in steps above to set up the thermostat again to send signals to the W8665A Receiver. Multizone Applications (Up to three T8665A/
one W8665E) IMPORTANT The thermostats must be set up one zone at a time to ensure a unique address is used for each zone. 1. Place the Zone 1 DIP switch on the W8665E Receiver to the On position. NOTE: Observe that the Zone 1 LED on the W8665 flashes. 2. Press the thermostat Fan key to the On position. The Receiver accepts the message, stores the identity of that zone, and stops flashing the Zone 1 LED. The thermostat is now set up to send signals to Zone 1 of the W8665E Receiver. NOTE: The word On and a fan blade appear in the thermostat display to indicate the thermostat is calling for the fan to turn on. 3. Set the System and Fan keys to the desired loca-
tions. NOTE: At any time, if you want to stop the thermostat from sending signals to the W8665 Receiver, simply turn the DIP switch to the Off position. Follow the instructions in steps above to set up the thermostat again to send signals to the W8665E Receiver. 4. Repeat steps 1-3 for zones two and three. 5. Attach the zone number stickers, included with the thermostat, onto the thermostat case on the inside of the thermostat cover. See Fig. 5. Z o n e 3 Z o n e 2 Z o n e 1 Place one label inside each thermostat door. M13426 Fig. 5. Zone stickers included with T8665A Thermostat. 3 69-1535 Table 2. Default Program Settings. Period Time Heat Setpoint Cool Setpoint Fan Setting Wake Leave Return Sleep 6:00 AM 8:00 AM 6:00 PM 70F
(21C) 62F
(16.5C) 70F
(21C) 78F
(25.5C) 85F
(29.5C) 78F
(25.5C) 10:00 PM 62F
(16.5C) 82F
(28C) Auto Auto Auto Auto INSTALLER SETUP NOTE: For most applications, the thermostat factory-
settings do not need to be changed. Review the factory default settings in Table 3 and, if no changes are necessary, go to the Installer Self-
Test section. The Installer Setup is used to customize the thermostat to specific systems. Some of the options include temperature display and system changeover. Installer Setup numbers are listed in Table 3. The table includes all the configuration options and the factory-settings for the T8665. A combination of key presses are required to use the Installer Setup feature:
To enter the Installer Setup, press and hold the Information i key with the increase L and decrease M keys until the first number is displayed. All display segments appear for approximately three seconds before the number is displayed. See Fig. 7 and 8. To advance to the next Installer Setup, press the Time To change a setting, use the increase L or decrease L key. M key. To scroll the Installer Setup numbers backward, press the Time M key. To exit the Installer Setup, press Run Program. Temporary Setting Set Day/Time AM Set Program Wait Recovery Hold for Filter Mon Tue Wed Thu Fri Sat Sun Wake Leave Return Sleep Aux Ht Em Ht Days PM Repl Batt DST Outdoor Room Heat Cool System Em Heat Off Cool Auto Fan On Auto M14559 Fig. 7. DIsplay of all LCD segments. WIRELESS THERMOSTAT SETTINGS System and Fan Settings The system default setting is Heat and the fan default setting is Auto. Use the System and Fan keys to change the settings. See Fig. 6. The fan settings can be set for each program period individually. The system selection is for all the program periods. System settings control the thermostat operation as follows:
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 heating and cooling operation, depending on the indoor temperature. Fan settings control the system fan as follows:
On: Fan operates continuously. Auto: Fan operates with equipment. Run Program Set Current Day/Time Hold Temp Day Time Set Program Wake Leave Return Sleep Heat/Cool Settings System Fan Daylight Time Copy System Fan M14625 Fig. 6. Thermostat System and Fan key locations. NOTE: Always press the keys with your fingertip or sim-
ilar blunt tool. Sharp instruments like a pen or pencil point can damage the keyboard. Programmed Temperature Settings Refer to Table 2 for the default program. If the daytime energy savings period is not used, press the period key
(Leave or Return) until the time is blank. The fan setting feature is available on select thermostat models. See Owners Guide for complete instructions on changing the program. 69-1535 4 WIRELESS THERMOSTAT CAUTION Equipment Damage Hazard. Electric heat and heat pump systems must run with fan. Configure to 1 in Installer Setup number 2 to prevent equipment damage. IMPORTANT Only configured numbers are shown on the device.For example: If thermostat does not have a system key, Installer Setup Number 12 will not display. Review Table 3 factory settings and mark any desired changes in the Actual Settings column. When Installer Setup is com-
plete, review the settings to confirm they Mat-
thew system. INSTALLER SETUP NUMBER DISPLAY
(COLUMN 2 OF TABLE 3) FACTORY SETTING OR OTHER CHOICE DISPLAY (COLUMN 3 OR 5 OF TABLE 3) M14618 Fig. 8. Display of Installer Setup number and settings. 5 69-1535 WIRELESS THERMOSTAT Installer Setup Number
(Press Time s key to change) Select Not used 1 Fan operationa 2 Not used Heating cycle rate 3 4 5 thru 11 12 13 Not used System setting adjustment Adaptive Intelligent Recovery control Degree temperature display Not used Clock format Not used Extended fan operation in heatinga 14 15 16 17 and 18 19 Extended fan operation in coolinga 20 Not used Deadband 21 thru 29 30 Not used 31 and 32 Minimum off time for the compressor 33 0 6 1 0 0 0 0 0 3 5 Table 3. Thermostat Installer Setup Options. Factory Setting Other Choices
(Press L or M key to change) Display Description Conventional applications where equipment controls fan operation in heat mode 66 cph used for conventional heat Display 1 1, 3 or 9 Description Heat pump or electric heat applications where thermostat controls fan operation in heat mode 11 cph used for radiant floor heat, gravity system 33 cph used for hot water systems or high efficiency furnaces 99 cph used for electric heat systems 0Auto changeover 2Auto only Conventional recovery
(system starts recovery at programmed time) Temperature is displayed in C 24-hour clock format Fan operation is extended 90 seconds after the call for heat ends. Fan operation is extended 90 seconds after the call for cool ends. setpoints can be set no closer than the chosen value:
44F (2C) 55F (2.5C) 66F (3C) 77F (3.5C) 88F (4C) 99F (4.5C) 1010F (5C) Actual Setting 4 thru 10 Heating and cooling Manual changeover 0 or 2 Adaptive Intelligent Recovery control is activated (system starts early so setpoint is reached by start of program period) Temperature is displayed in F 1 1 12-hour clock format 1 1 No extended fan operation after the call for heat ends No extended fan operation after the call for cool ends 1 Heating and cooling setpoints can be set no closer than 3F
(1.5C) five-minute minimum off time for the compressor 0 thru 4 Minimum number of minutes (0 thru 5) the compressor will be off between calls for the compressor 69-1535 6 Table 3. Thermostat Installer Setup Options. (Continued) WIRELESS THERMOSTAT Temperature range stops in heating Temperature range stops in cooling Not used Temperature display adjustment 34 35 36 37 90 45 0 Highest setpoint heating can be set to Lowest setpoint cooling can be set to 40 to 89 46 to 99 3 thru
-3 No difference in displayed temperature and actual room temperature Temperature range (1F increments) heating setpoint can be set to Temperature range (1F increments) cooling setpoint can be set to 1Display adjusts to 1F higher than actual room temperature 2Display adjusts to 2F higher than actual room temperature 3Display adjusts to 3F higher than actual room temperature
-1Display adjusts to 1F lower than actual room temperature
-2Display adjusts to 2F lower than actual room temperature
-3Display adjusts to 3F lower than actual room temperature a Number 2 must be set to 1 to extend fan operation. IMPORTANT Review the settings to confirm they match the system. Press Run Program to exit the Installer Setup. The thermostat has saved the Iinstaller Setup changes and initiated a reset to operate using the new settings. Be sure to set the cur-
rent day and time immediately. Setting Current Day and Time 1. Press Set Current Day/Time. NOTE: On initial powerup or after an extended power loss, 1:00 pm flashes on the display until a key is pressed. 3. Press Time L or Time M until the current time is displayed. NOTE: Tapping Set Current Day/Time changes the time in one-hour increments. Time Set Day/Time AM Run Program Set Current Day/Time Time Set Program Wake Leave Return Sleep Hold Temp Day Heat/Cool Settings System Fan Tue Daylight Time Copy M14621 NOTE:
If the current time is Daylight Savings Time, press Daylight Time until DST is displayed. Set Current Day/Time Run Program Set Current Day/Time Time Set Program Wake Leave Return Sleep Hold Temp Day Heat/Cool Settings System Fan Mon Daylight Time Copy Set Day/Time PM 2. Press Day until the current day is displayed. NOTE: Sun=Sunday, Mon=Monday, Tue=Tuesday, Wed=Wednesday, Thu=Thursday, Fri=Friday, Sat=Saturday. M14619 Daylight Time Run Program Set Current Day/Time Time Set Program Wake Leave Return Sleep Hold Temp Day Heat/Cool Settings System Fan Tue Daylight Time Copy Set Day/Time AM DST 4. Press Run Program. Run Program Run Program Set Current Day/Time Time Set Program Wake Leave Return Sleep Hold Temp Day Heat/Cool Settings System Fan Daylight Time Copy AM Tue Wake Room DST Day Run Program Set Current Day/Time Time Set Program Wake Leave Return Sleep Hold Temp Day Heat/Cool Settings System Fan Tue Daylight Time Copy Set Day/Time PM M14620 M14622 System Heat Fan Auto M14623 7 69-1535 WIRELESS THERMOSTAT INSTALLER SYSTEM TEST Use the Installer System Test to check the thermostat operation. Refer to Table 4 for a list of the available Installer System Tests. CAUTION Equipment Damage Hazard. Compressor damage can result if compressor is cycled too quickly. Be aware that compressor minimum off time is bypassed during the Installer System Test. To start the system test:
1. Press and hold increase L and decrease M at the same time until 10 appears. 2. Observe all segments of the display are displayed before the 10 appears. See Fig. 9 and 10. Table 4. Tests Available in Installer System Test. Test Number System Test Description 10-19 30-39 40-49 60 0 to 60 19 70-79 Heating equipment can be turned on and off. Cooling equipment can be turned on and off. Fan equipment can be turned on and off. Keyboard keys test. Thermostat information, including date code and software versions, are displayed. Temporary Setting Set Day/Time AM Set Program Wait Recovery Hold for Filter Mon Tue Wed Thu Fri Sat Sun Wake Leave Return Sleep Aux Ht Em Ht Days PM Repl Batt DST Outdoor Room Heat Cool Fig. 9. LCD segments display. System Em Heat Off Cool Auto Fan On Auto M14559 M14612 Fig. 10. Test number display. Refer to Table 5 for the instructions and description of the specific tests. NOTE: Press Time L to advance to the next test and press Time M to go back to the previous test. Press Run Program to exit the system test. Key to Press Test Number Heating Equipment System Test Time L 10 11 12 M Cooling Equipment System Test Time L M Fan Equipment System Test Time L M Key Operation System Test Time 60 2 30 31 30 40 41 40 Table 5. Installer System Test Options. Description Enter heating equipment system test. Heat comes on. When Installer Setup number 2 is 1, the system fan is also energized. Heat and system fan turn off. Change from heating to cooling equipment system test. Cool and system fan come on. Cool and system fan turn off. Change from cooling to fan equipment system test. Fan comes on. Fan turns off. Change from fan to key operation system test. NOTE: Press any key and the displayed number will change. Press TIme M to go to the previous test and Time L to go to the next test. The Run Program key will not exit this test. Press Time L or Time M and then the Run Program key to exit. 69-1535 8 Thermostat Information 1. Press the Time key to access the thermostat infor-
mation. 2. Press the increase L key to display the production date code. The first two large digits are the month and the third digit is the last digit of the year (exam-
ple: 027=February 1997). M14613 WIRELESS THERMOSTAT M14615 4. Press the increase key L again to display the soft-
ware revision number (example:001 = revision number 1). 5. Press the increase L key again to display the EEPROM identification code (example: 314 =
EEPROM ID 314). 3. Press the increase key L again to display the soft-
ware identification code. (Example: 02 = software ID code 2). M14614 6. Press the Run Program key to exit the system test. The system test times out after four minutes with-
out any key presses. M14617 9 69-1535 WIRELESS THERMOSTAT TROUBLESHOOTING GUIDE For troubleshooting, see Table 6. Table 6. Troubleshooting Guide. Symptom Possible Cause Display does not come on. Thermostat is not being powered. Room temperature display has been reconfigured. Thermostat is configured for F or C display. Poor choice of thermostat location. The upper or lower temperature limits were reached. The setpoint temperature range stops were configured. Thermostat is calling for heat (flame icon is in display). Thermostat is not calling for heat (no flame icon is in display). Thermostat minimum off time is activated. System selection is not set to Heat. Heating setpoint is below room temperature. Thermostat minimum off time is activated. System selection is not set to Cool. Cool setpoint is above room temperature. Thermostat is calling for cool (snowflake is in display). Thermostat is not calling for cool (no snowflake icon is in display). Fan operation set for 0
(conventional heat) when it should be set for 1 (electric heat). Conventional heating equipment turns on the fan when the furnace has warmed up to a setpoint. Heating or cooling equipment is not operating. Backlight may fade over the life of the batteries. Temperature display is incorrect. Temperature settings do not change.
(Example:
Cannot set the heating higher or the cooling lower.) Heating does not come on. Cooling does not come on. System on indicator
= heat,
= cool) is displayed, but no warm or cool air is coming from the registers. Thermostat backlight appears dim. 69-1535 Action Check if batteries are present and installed correctly. If batteries are present and installed correctly, replace thermo-
stat. Enter Installer Setup number 37 and reconfigure the display. Enter Installer Setup number 14 and reconfigure the display. Relocate the thermostat. Check the temperature setpoints:
Heating limits are 40 to 90F (4.5 to 32C)
Cooling limits are 48 to 99F (7 to 35C) Check Installer Setup numbers 34 and 35 and reconfigure the setpoint stops. Troubleshoot the W8665 Receiver Module. Troubleshoot the heating equipment.
Raise heating setpoint above room temperature.
Check if the W8665 is set up to receive signals from this thermostat. Set up W8665 to receive signals. Wait up to five minutes for the system to respond. Set system selection to Heat. Check heating setpoint. Set heating setpoint to desired temperature.
Wait up to five minutes for the system to respond. Enter Installer Setup number 33. Reconfigure minimum off time (if required). Set system selection to Cool. Check cooling setpoint. Set cooling setpoint to desired temperature. Troubleshoot cooling equipment. Troubleshoot W8665 Receiver Module.
Check if the W8665 is set up to receive signals from the thermostat. Set up W8665 to receive signals. Enter Installer Setup number 2 and reconfigure the fan operation. Wait a minute after seeing the on indicator and then check the registers. Verify operation of heating or cooling equipment in self-test.
Wait unit Replace Battery indicator is illuminated and replace batteries.
Replace batteries now. 10
WIRELESS THERMOSTAT Home and Building Control Home and Building Control Honeywell 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limite 35 Dynamic Drive Scarborough, Ontario M1V 4Z9 69-1535 G.H. 08-01 Printed in Taiwan R.O.C. www.honeywell.com/yourhome