Honeywell CHRONOTHERM T8602C User's Manual
Contents
1. OUTDOOR TEMPERATURE SENSOR A L1 HOT L2 L2 COOLING HEATING TRANSFORMER TRANSFORMER A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A JUMPER RC TERMINAL TO R TERMINAL WHEN INSTALLED ON A ONE TRANSFORMER SYSTEM A CAN BE USED FOR CHANGEOVER VALVE ON SINGLE STAGE HEAT PUMP SYSTEMS A AVAILABLE ON SELECT MODELS OT WIRES MUST HAVE A SEPARATE CABLE FROM THE THERMOSTAT CABLE A T8600D MODELS REQUIRE POWER TO R TERMINAL AT ALL TIMES M10348 Fig 5 Typical hookup in heat and cool system with two transformers THERMOSTAT PILOTSTAT CONTROL IF USED OUTDOOR TEMPERATURE SENSOR CONTROL MILLIVOLTAGE GENERATOR MILLIVOLTAGE GAS CONTROL A AVAILABLE ON SELECT MODELS OT WIRES MUST HAVE A SEPARATE CABLE FROM THE THERMOSTAT CABLE M20270 Fig 6 T8602 typical millivoltage heating circuit FOR WRAPAROUND FOR STRAIGHT INSERTION STRIP 5 16 IN 8 MM INSERTION STRIP B M4826 7 16 IN 11 MM Fig 7 Correct wiring technique Mounting Thermostat 1 Engage tabs at the top of the thermostat and wallplate See Fig 8 2 Press lower edge of case to close and latch NOTE Toremove the thermostat from the wall first pull out at the bottom of the thermostat remove top last A ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE B PRESS LOWER EDGE OF CASE TO LATCH M14628 Fig 8 Mounting therm2. code without any key presses Example 02 software ID code 2 CHECKOUT Outdoor Temperature Sensor Select Models Allow the outdoor temperature sensor to absorb the we outdoor air for a minimum of five minutes before taking a reading 69 1670 10 T8602C CHRONOTHERMP IV DELUXE PROGRAMMABLE THERMOSTATS TROUBLESHOOTING GUIDE Table 6 Troubleshooting Guide Symptom Possible Cause Action Display does not Thermostat is not being Check if batteries are present and installed correctly come on powered If batteries are present and installed correctly replace thermostat Temperature Room temperature display has Enter Installer Setup number 37 and reconfigure the display display is incorrect been reconfigured Thermostat is configured for F or C display Enter Installer Setup number 14 and reconfigure the display Bad thermostat location Relocate the thermostat Temperature settings do not change Example Cannot set the heating higher or the cooling lower The upper or lower temperature limits were reached Check the temperature setpoints Heating limits are 40 to 90 F 4 5 to 32 C Cooling limits are 48 to 99 F 7 to 37 C The setpoint temperature range stops were configured Check Installer Setup numbers 34 and 35 and reconfigure the setpoint stops Heating does not come on No power to the thermostat Check for 24 Vac between R and W
3. 1670 T8602C CHRONOTHERMP IV DELUXE PROGRAMMABLE THERMOSTATS Setting Current Day and Time 1 Press Set Current Day Time NOTE Opn initial powerup or after an extended power loss 1 00 pm flashes on the display until a key is pressed M14619 2 Press Day until the current day is displayed NOTE Sun Sunday Mon Monday Tue Tuesday Wed Wednesday Thu Thursday Fri Friday Sat Saturday M14620 3 Press Time A or Time V until the current time is displayed NOTE Tapping the Set Current Day Time changes the time in one hour increments M14621 NOTE Ifthe current time is Daylight Savings Time press Daylight Time until DST is displayed 69 1670 M14622 ELI n d BIS BH M14623 View or Reset Timer Settings When the thermostat activates a timer the thermostat flashes Filter until the timer resets 1 Reset the timer by pressing the i key until the expired timer is displayed M20243 2 Press the Time A key to reset the timer Filter M20244 3 Press the Run Program key NOTE You can view the number of days remaining at any time by pressing the i key three or four times If more than one timer is active all active timers show sequentially when pressing the i key several times T8602C CHRONOTHERMP IV DELUXE PROGRAMMABLE THERMOSTATS INSTALLER SYSTEM TEST Use the Installer System Test to check the t
4. D DECREASE TIME SETTING OR DAY TO ANOTHER DAY SCROLL BACKWARD THROUGH HET D COOLING INSTALLER SETUP AND SYSTEM TEST M14880 Fig 9 T8602D key locations and descriptions 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 10 System settings control the thermostat operation Heat The thermostat controls the heating Off Both the heating and cooling are off Cool The thermostat controls the cooling Fan settings control the system fan On Fan operates continuously Auto Fan operates with equipment Heat Off Cool On Auto Fan M14881 Fig 10 Thermostat System and Fan key locations 69 1670 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 See Owner s Guide for complete instructions on changing the program Table 2 Default Program Settings Period Time Heat Setpoint Cool Setpoint Wake 6 00 AM 70 F 78 F 21 C 25 5 C Leave 8 00AM 62 F 85 F 16 5 C 29 5 C Return 5 00 PM 70 F 78 F 21 C 25 5 C Sleep 10 00 PM 62 F 82 F 16 5 C 28 C T8602C CHRONOTHERMP IV DELUXE PROGRAMMABLE THERMOSTATS FAN OPERATION SWITCH The thermostat fan operation switch labeled FUE
5. Honeywell T8602C Chronotherm IV Deluxe Programmable APPLICATION Thermostats INSTALLATION INSTRUCTIONS The T8602 Chronotherm IV Deluxe Programmable Thermostat provides electronic control of 24 Vac single stage heating and cooling systems or 750 mV heating system Refer to Table 1 for a general description of the thermostat All T8602 thermostats are powered by batteries Table 1 Description of T8602 Thermostats T8602 System C Heat Cool Changeover Manual Heat Off Cool System Selection Fan Selection On Auto Comments System and fan selections are made on 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 Dispose of properly Contact your local waste management authority for instructions regarding recycling and the proper disposal of the old control INSTALLATION n Installing this Product 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 3 Installer must be a trained experienced service technician 4 After completing installation use these instructions to check out the product operation U S Registered Trademark Copyright 2003 Honeywell All Rights Reserv
6. L SWITCH in Fig 11 is factory set in the F position This is the correct setting for most systems If your system is an electric heat system set the switch to E The E setting allows the fan to turn on immediately with the heating or cooling in a system where the G terminal is connected FUEL SWITCH M12676 Fig 11 Fan operation switch INSTALLER SETUP NOTE For most applications the thermostat factory settings do not require changing Review factory 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 outdoor temperature display Installer Setup numbers are listed in Table 3 The table includes all the configuration options and the factory settings for the T8602 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 A and decrease W keys until the first number is displayed All display segments appear for approximately three seconds before the number is displayed See Fig 12 and 13 To advance to the next Installer Setup press the Time A key To change a setting use the increase A or decrease W key To scroll the Installer Setup numbers backward press the Time
7. V key To exit the Installer Setup press Run Program System Wait ESA Temporary Setting gemma Noel QE o ES cic Lr mm aE H M DuC CEN Mon Tue Wed Thu Fri Sat Sun Repl Batt B Wake Leave Return Sleep DST W Heat Cool A M19014 Fig 12 Display of all LCD segments FACTORY SETTING OR OTHER CHOICE DISPLAY COLUMN 3 OR 5 OF TABLE 3 INSTALLER SETUP NUMBER DISPLAY COLUMN 2 OF TABLE 3 M14618 Fig 13 Display of Installer Setup number and setting IMPORTANT Only configurable numbers are shown on the device Example If thermostat does not have a system key Installer Setup Number 12 will not be displayed Review Table 3 factory settings and mark any desired changes in the Actual Setting column When Installer Setup is com plete review the settings to confirm that they match the system 5 69 1670 T8602C CHRONOTHERMP IV DELUXE PROGRAMMABLE THERMOSTATS Table 3 Thermostat Installer Setup Options Installer Setup Number Press Factory Setting Other Choices Press A or V key to change Time A key to Actual Select change Display Description Display Description Setting Not Used 1 thru 3 Heating cycle 4 6 6 6 cph used for 1 30r 9 1 1 cph used for radiant rate conventional heat floor heat gravity system 3 3 cph used for hot water systems or high efficiency furnaces 9 9 cph used for electric heat system
8. WALL on WALL ANCHORS 2 JHE A MOUNTING e HOLES MOUNTING SCREWS M15044 Fig 2 Mounting the wallplate 69 1670 WIRING All wiring must comply with local electrical codes and ordinances Refer to Fig 3 and 6 for typical hookup A letter code is located near each terminal for identification N CAUTION Electrical Hazard Can cause electric shock or equipment damage Disconnect power before wiring 1 Loosen the terminal screws on the wallplate and connect the system wires See Fig 7 IMPORTANT Use 18 gauge color coded thermostat cable for proper wiring Securely tighten each terminal screw Push excess wire back into the hole Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat PON THERMOSTAT TRANSFORMER A N Power SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED M10409 Fig 3 Typical hookup in heat application T8602C CHRONOTHERMP IV DELUXE PROGRAMMABLE THERMOSTATS THERMOSTAT COMPRESSOR CONTACTOR OUTDOOR TEMPERATURE SENSOR TRANSFORMER POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED CAN BE USED FOR CHANGEOVER VALVE ON SINGLE STAGE HEAT PUMP SYSTEMS A AVAILABLE ON SELECT MODELS OT WIRES MUST HAVE A SEPARATE CABLE FROM THE THERMOSTAT CABLE M10347A Fig 4 Typical hookup in heat and cool system with one transformer THERMOSTAT
9. ber 33 Reconfigure minimum off time if required System selection is not set to Cool Set system selection to Cool Cool setpoint is above room temperature Check cooling setpoint Set cooling setpoint to desired temperature 11 69 1670 T8602C CHRONOTHERMP IV DELUXE PROGRAMMABLE THERMOSTATS Table 6 Troubleshooting Guide Continued Symptom System on indicator flame heat snowflake cool is displayed but no warm or cool air is coming from the Possible Cause Fan operation set for F conventional heat when it should be set for E electric heat Action Set Fan Operation switch Fuel switch Conventional heating equipment turns on the fan when the Wait a minute after seeing the on indicator and then check the registers registers furnace has warmed up to a setpoint Heating or cooling equipment is Verify operation of heating or cooling equipment in self test not operating Outdoor tempera Option not activated Enter Installer Setup number 24 and set to 1 Thermostat must ture not displayed have OT terminals and a C7089B1000 installed Outdoor Outdoor sensor is connected Refer to C7089B1000 Installation Instructions and check wiring temperature incorrectly between the thermostat and sensor display is incorrect Wrong sensor Replace sensor with C7089B1000 Sensor Thermostat backlight appears dim Backlight can fade over the life
10. ed 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 50 8 mm x 101 6 mm wiring box Position wallplate horizontally on the wall or on a 2in x4 in 50 8 mm x 101 6 mm wiring box 69 1670 T8602C CHRONOTHERMP IV DELUXE PROGRAMMABLE THERMOSTATS 5 FEET 1 5 METERS M10106 Fig 1 Typical location of thermostat 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 inch 76 mm holes in the wall if drywall as marked For firmer material such as plaster drill two 7 32 inch 5 56 mm holes Gently tap anchors provided into drilled holes until flush with wall 4 Position the wallplate over the holes pulling wires through the wiring opening Loosely insert the mounting screws into the holes Tighten mounting screws WALL WIRES THROUGH
11. hermostat operation Refer to Table 4 for a list of the available system tests Wait SECRET Temporary Setting eSysiem gemma emm Rl end PEE a ea i li l T pm ui LI li Id N CAUTION e OOOO ai min Equipment Damage Hazard Mon Tue Wed Thu Fri Sat Sun Repl Batt Room Minimum compressor off time is bypassed Wake Leave Return Sleep DST WHeatCoolA during Installer System Test M19014 Avoid cycling compressor quickly To start the system test Fig 14 Display of all LCD segments Press and hold the increase A and decrease W keys at the same time until 10 appears All segments of the display will be displayed before the 10 appears See Fig 13 and 14 Table 4 Tests Available In Installer System Test Heating Equipment System Test Test Number System Test Description 10 19 Heating equipment can be turned on and off wee 30 39 Cooling equipment can be turned on and off Fig 15 Display of test number 40 49 Fan equipment can be turned on and off 60 0 to Keyboard keys test Refer to Table 5 for the directions and results of the 60 19 specific tests NOTE Press Time A to advance to the next test and Time V to go back to the previous test Press Run Program to exit the system test Table 5 Installer System Test Options Keys to Test Press Number Description Time A 10 Enter heating equipment system test A 11 Heat comes on When Installer Setup number 2 is 1 the system fan i
12. of the batteries Wait until Replace Battery indicator is illuminated and replace batteries Replace batteries now Select models Honeywell Automation and Control Solutions Honeywell International Inc 1985 Douglas Drive North Golden Valley MN 55422 69 1670 G H 1 03 Honeywell Limited Honeywell Limit e 35 Dynamic Drive Scarborough Ontario MIV 4Z9 e Printed in U S A on recycled paper containing at least 10 post consumer paper fibers www honeywell com yourhome
13. ostat on wallplate 3 69 1670 T8602C CHRONOTHERMP IV DELUXE PROGRAMMABLE THERMOSTATS Using Thermostat Keys The thermostat keys are used to set current day and time configure Installer Setup check Self Test display outdoor temperature select models program times and setpoints for heating and cooling See Fig 9 for location of the keys temporarily override program temperatures i i display present setting NOTE Always press the keys with your fingertip or similar blunt tool Sharp instruments like a pen or pencil point can damage the keyboard INCREASE TIME SETTING SET WAKE TIMES SET LEAVE TIMES SET RETURN TIMES INCREASE TEMPERATURE OR SCROLL FORWARD AND SETPOINTS AND SETPOINTS AND SETPOINTS SETTING OR SCROLL FORWARD THROUGH THROUGH INSTALLER SETUP INSTALLER SETUP OPTIONS AND SYSTEM TEST DECREASE TEMPERATURE SET CURRENT e SETTING OR SCROLL DAY AND TIME BACKWARD THROUGH V INSTALLER SETUP OPTIONS RETURN TO lt _ DISPLAY INFORMATION NORMAL SUCH AS PRESENT OPERATIONS SETTINGS AND OUTDOOR TEMPERATURE ENTER _ __ J ERE uz LL ALA SET SLEEP TIMES HOLD M eal cea Wake Leave Return Sleep awbsETPOINTS Host on CER inm CHO Day 5 Vv cag System lt SYSTEM SWITCH SET CURRENT OR A PROGRAM DAY co FAN SWITCH CHANGE BETWEEN Em DAYLIGHT SAVINGS OANGE BETWEEN AND STANDARD aem COPY ONE PROGRAMME
14. p Number Press Factory Setting Other Choices Press A or V key to change Time A key to Actual Select change Display Description Display Description Setting Temperature 37 0 No difference in 3 thru 3 1 Display adjusts to 1 F display displayed higher than actual room adjustment temperature and temperature actual room 2 Display adjusts to 2 F temperature higher than actual room temperature 3 Display adjusts to 3 F higher than actual room temperature 1 Display adjusts to 1 F lower than actual room temperature 2 Display adjusts to 2 F lower than actual room temperature 3 Display adjusts to 3 F lower than actual room temperature Furnace Air 43 2 90 days calendar 0 1 3 4 O off Filter Timer days 1 30 days 3 180 days 4 365 days Time is counted by calendar days in any mode Humidifier Pad 44 0 Off 1 2 3 1 90 days Monitor 2 180 days 3 365 days Time is counted by calendar days in heat mode Ultraviolet UV 45 0 Off 1 1 365 days Air Treatment Time is counted by calendar System Lamp days in any mode Monitor IMPORTANT Review the settings to confirm that they match the system Press Run Program to exit the Installer Setup The thermostat has saved the Installer Setup changes and initiated a reset in order to operate using the new settings Be sure to set the current day and time immediately 7 69
15. s Not Used 5 thru 12 Adaptive 13 0 Adaptive Intelligent 1 Conventional recovery Intelligent Recovery system starts recovery at Recovery control is activated programmed time control system starts early so setpoint is reached by start of program period Degree 14 0 Temperature is 1 Temperature is displayed temperature displayed in F in C display Not Used 15 Clock format 16 0 12 hour clock 1 24 hour clock format format Not Used 17 thru 23 Outdoor 24 0 No outdoor 1 Outdoor temperature is temperature temperature is displayed Needs a display models displayed C7089B1000 Outdoor with OT Temperature Sensor to terminals operate Not Used 25 thru 32 Minimum off 33 5 5 minute minimum 0 thru 4 Minimum number of minutes time for the off time for the 0 thru 5 the compressor is compressor compressor off between calls for the compressor Temperature 34 90 Highest heating 40t089 Temperature range 1 F range stops in setpoint setting increments of heating heating setpoint settings Temperature 35 45 Lowest cooling 46to 99 Temperature range 1 F range stops in setpoint setting increments of cooling cooling setpoint settings Not Used 36 69 1670 T8602C CHRONOTHERMP IV DELUXE PROGRAMMABLE THERMOSTATS Table 3 Thermostat Installer Setup Options Continued Installer Setu
16. s also energized v 10 Heat and system fan turn off Cooling Equipment System Test Time A 30 Change from heating to cooling equipment system test A 31 Cool and system fan come on v 30 Cool and system fan turn off Fan Equipment System Test Time A 40 Change from cooling to fan equipment system test A 41 Fan comes on v 40 Fan turns off Key Operation System Test Time A 60 2 Change from fan to key operation system test NOTE Press any key and the displayed numbers change Press Time V to go to the previous test and Time A to go to the next test The Run Program key will not exit this test Press Time A or Time V and then the Run Program key to exit 9 69 1670 T8602C CHRONOTHERMP IV DELUXE PROGRAMMABLE THERMOSTATS THERMOSTAT INFORMATION 1 Press the Time A key to access the thermostat 4 Press the increase A key again to display the soft information ware revision number Example 001 Revision number 1 M14613 aE 2 Press the increase A key to display the production i i date code The first two large digits are the month sendy Lar cols again to display the and the third digit is the last digit of the year Example 314 EEPROM ID 314 Example 027 February 1997 M14617 aed 6 Press the Run Program key to exit the System 3 Press the increase A key again to display the soft Test The System Test times out after four minutes ware identification
17. terminals check for 750 mV on PowerPile Systems f missing 24 Vac check if the circuit breaker is tripped reset the circuit breaker check if the system fuse is blown replace the fuse check if the power switch on the HVAC equipment is in the Off position set to the On position check wiring between thermostat and HVAC equipment replace any broken wires and tighten any loose connections If 24 Vac is present proceed with troubleshooting Thermostat minimum off time is activated Wait up to five minutes for the system to respond System selection is not set to Heat Set system selection to Heat Heating setpoint is below room temperature Check heating setpoint Set heating setpoint to desired temperature Cooling does not come on No power to the thermostat Check for 24 Vac between R or RC and Y terminals f missing 24 Vac check if the circuit breaker is tripped reset the circuit breaker check if the system fuse is blown replace the fuse check if the power switch on the HVAC equipment is in the Off position set to the On position check wiring between thermostat and HVAC equipment replace any broken wires and tighten any loose connections f 24 Vac is present proceed with troubleshooting Thermostat minimum off time is activated Wait up to five minutes for the system to respond Enter Installer Setup num
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