Honeywell t8624d User's Manual
Contents
1. IMPORTANT NOTE Sun Sunday Mon Monday 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 Setting Current Day and Time 1 Press Set Current Day Time NOTE On initial powerup or after an extended power Tue Tuesday Wed Wednesday Thu Thursday Fri Friday Sat Saturday loss 1 00 pm flashes on the display until a key is pressed CS Set Current cea Day Time 2 Press Day until the current day is displayed Soc e Eoel eg played M14620 3 Press Time A or Time V until the current time is dis NOTE Tapping the Set Current Day Time changes the time in one hour increments M14619 M14621 69 1412 1 T8624D CHRONOTHERMP IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS NOTE If the current time is Daylight Savings Time press Daylight Time until DST is displayed M14622 M14623 Viewing or Resetting 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 skey to reset the timer Filter M20244 3 Press the Run Program key NOTE You2. WALL V ANCHORS 2 on Es pz MOUNTING i7 HOLES MOUNTING SCREWS M15044 Fig 2 Mounting the wallplate 69 1412 1 WIRING All wiring must comply with local electrical codes and ordinances Refer to Fig 3 for typical hookup A letter code is located near each terminal for identification N CAUTION Electrical Shock Hazard Can cause electrical shock or equipment damage Disconnect power before beginning wiring 1 Loosen the terminal screws on the wallplate and connect the system wires See Fig 4 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 pre vent drafts from affecting the thermostat RON T8624D CHRONOTHERMP IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS THERMOSTAT A 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 HEAT M11309 PUMP SYSTEMS Fig 3 Typical hookup of T8624D in a heat pump system FOR WRAPAROUND INSERTION STRIP TING IN 11 MM y Fig 4 Correct wiring technique FOR STRAIGHT INSERTION STRIP 5 16 IN 8 MM M4826 Mounting Thermostat 1 Engage tabs at the top of the thermostat and wall
3. plate See Fig 5 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 5 Mounting thermostat on wallplate 69 1412 1 T8624D CHRONOTHERM IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS INGKEASE IEMEEKATUKE INCREASE TIME SETTING SET WAKE TIMES SET LEAVE TIMES SET RETURN TIMES OR SCROLL FORWARD AND SETPOINTS AND SETPOINTS AND SETPOINTS SETTING oR SCROLL THROUGEDINSTAREESSETUE INSTALLER SETUP OPTIONS AND SYSTEM TEST 7 VN DECREASE TEMPERATURE SET CURRENT e SETTING OR SCROLL DAY AND TIME BACKWARD THROUGH 62 INSTALLER SETUP OPTIONS RETURN TO I PH1 DISPLAY INFORMATION NORMAL SUCH AS PRESENT OPERATIONS SETTINGS AND OUTDOOR TEMPERATURE ENTER me 71 INDEFINITE SET SLEEP TIMES mere T I Set Curent Wake M exe Raum Sleep l AND SETPOINTS DE orum Lp eee SET CURRENT OR Jl PROGRAM DAY L SELECT SYSTEM CHANGE BETWEEN OPERATION DAYLIGHT SAVINGS CHANGE BETWEEN AND STANDARD oram COPY ONE PROGRAMMED DECREASE TIME SETTING OR DAY TO ANOTHER DAY SCROLL BACKWARD THROUGH HEATING AND COOLING INSTALLER SETUP AND SYSTEM TEST SETPOINTS M14624 Fig 6 T8624D key locations and descri
4. Setting Not Used 1 Fan operation 2 0 Conventional 1 Heat pump and electric heat applications where applications where equipmentcontrols thermostat controls fan fan operation in operation in heat mode heat mode Not Used 3 Heating cycle 4 6 Stage 1 6 6 cph is fixed for stage 1 rate 5 Stage 2 3or9 3 3cph 6 6 cph factory setting for all stages of system 9 9 cph used for electric heat Not Used 6 thru 11 System setting 12 1 Manual Qor2 0 Auto changeover adjustment changeover 2 Fixed auto changeover a The cycle rate for the last stage of heat is adjustable with 6 cph as the factory setting 5 69 1412 1 T8624D CHRONOTHERMP IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS Table 3 Thermostat Installer Setup Options Continued 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 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 h
5. 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 INSTALLER SYSTEM TEST Use the Installer System Test to check the thermostat operation Refer to Table 4 for a list of the available system tests 69 1412 1 To start the system test N CAUTION The minimum off time for compressors is bypassed during the Installer System Test Equipment damage can occur if the compressor is cycled too quickly 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 10 and 11 Table 4 Tests Available In Installer System Test Test Number System Test Description 10 19 Heating equipment can be turned on and off 30 39 Cooling equipment can be turned on and off 40 49 Fan equipment can be turned on and off 60 0to 60 19 Keyboard keys test 70 79 Thermostat information including date code and software versions are displayed Wait KENTE Temporary Setting Recovery FHI EIE wT H Nd sacre ECHTE ag gt I amo m System Filter ERGY EGY Days 5 Mon Tue Wed Thu Fri Sat Sun Repl Batt Room bris d Wake Leave Return Sleep DST WHeatCoolA M14559 Fig 10 Display of all the segments of the LCD M14612 Fig 11 Display of test number R
6. 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 form number 69 0940 for complete instructions on changing the program Table 2 Default Program Settings Heat Cool Fan Period Time Setpoint Setpoint Setting Wake 6 00 AM 70 F 78 F Auto 21 C 25 5 C Leave 8 00 AM 62 F 85 F Auto 16 5 C 29 5 C Return 6 00 PM 70 F 78 F Auto 21 C 25 5 C Sleep 10 00 PM 62 F 82 F Auto 16 5 C 28 C T8624D CHRONOTHERMP IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS INSTALLER SETUP NOTE For most applications the thermostat factory settings will not need to be changed Review the factory settings in Table 2 and if no changes are necessary go to the Installer System Test section The Installer Setup is used to customize the thermostat to specific systems Some of the options include temperature display changeover 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 T8624 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 a
7. 1412 1 T8624D CHRONOTHERMP IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS THERMOSTAT INFORMATION 1 Press the Time A key to access the thermostat information M14613 2 Press the increase A 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 M14614 3 Press the increase A key again to display the soft ware identification code Example 02 software ID code 2 M14615 69 1412 1 4 Press the increase A key again to display the soft ware revision number Example 001 Revision number 1 M14616 Press the increase A key again to display the EEPROM identification code Example 314 EEPROM ID 314 m M14617 6 Press the Run Program key to exit the system test The system test times out after four minutes with out any key presses CHECKOUT Outdoor Temperature Sensor Select Models Allow the outdoor temperature sensor to absorb the outdoor air for a minimum of five minutes before taking a reading T8624D CHRONOTHERMP IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS TROUBLESHOOTING GUIDE Table 6 Troubleshooting Guide Symptom Display will not come on Possible Cause Thermostat is not being powered Action Check for 24 Vac between R and C terminals f missing 24 Vac check if the circuit breaker is tripped reset the circuit breaker check if the
8. Continued snowflake cool is displayed but no warm or cool air is coming from the registers Symptom Possible Cause Action System on indicator Heating or cooling equipment is Verify operation of heating or cooling equipment in self test flame heat not operating Outdoor tempera ture not displayed Option not activated Enter Installer Setup number 24 and set to 1 Thermostat must have OT terminals and a C7089B1000 installed Outdoor temperature display is incorrect Outdoor sensor is connected incorrectly Refer to C7089B1000 Installation Instructions and check wiring between the thermostat and sensor Wrong sensor Replace sensor with C7089B1000 Sensor Select models Honeywell Automation and Control Solutions Honeywell 1985 Douglas Drive North Golden Valley MN 55422 69 1412 1 GH Rev 12 02 Honeywell Limited Honeywell Limit e 35 Dynamic Drive Scarborough Ontario M1V 4Z9 e Printed in U S A on recycled paper containing at least 1096 post consumer paper fibers www honeywell com yourhome
9. Honeywell T8624D Chronotherm IV Deluxe Programmable Multistage Thermostats APPLICATION The T8624D Chronotherm IV Deluxe Programmable Multistage Thermostats provides electronic control of 24 Vac single zone multistage systems INSTALLATION INSTRUCTIONS Refer to Table 1 for a general description of the thermostats All T8624 thermostats require a common wire to supply power Table 1 Description of T8624 Thermostats Fan T8624 Changeover System Selection Heat Off Cool Auto On Auto Selection System and fan selections are done by keyboard Comments 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 U S Registered Trademark Copyright 2002 Honeywell All Rights Reserved 3 Installer must be a trained experienced service technician 4 After completing installation use these instructions to check out the product operation Location Ins
10. efer to Table 5 for the directions and results of the specific tests 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 T8624D CHRONOTHERMV IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS Table 5 Installer System Test Options Keys to Test Press Number Description Heating Equipment System Test Time A 10 Enter heating equipment System Test A 11 Stage one heat comes on The system fan is also energized A 12 Stage two heat comes on Stage one heat and system fan remain on v 11 Stage two heat turns off v 10 Stage one heat and system fan turn off Cooling Equipment System Test Time A 30 Change from heating to cooling equipment System Test A 31 Stage one cool and system fan come on v 32 Stage two cool comes on Stage one cool and system fan remain on v 31 Stage two cool turns off v 30 Stage one 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 y 40 Fan turns off Key Operation System Test Time A 60 Change from fan to key operation System Test NOTE Press any key and the displayed numbers will 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
11. ling increments of cooling cooling setpoint settings Not Used 36 69 1412 1 T8624D CHRONOTHERMP IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS Table 3 Thermostat Installer Setup Options Continued Select Temperature display adjustment Installer Setup Number Press Time A key to change 37 Factory Setting Other Choices Press A or V key to change Display Description 0 No difference in displayed temperature and actual room temperature Display 3 thru 3 Description 1 Display adjusts to 1 F higher than actual room temperature 2 Display adjusts to 2 F 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 Actual Setting Furnace Air Filter Timer 43 2 30 days System run time 0 1 3 4 0 Off 1 10 days 3 60 days 4 120 days Time counted when heat cool or fan is running Humidifier Pad Monitor 44 1 90 days 2 180 days 3 365 days Time counted by calendar days in heat mode Ultraviolet Air Treatment UV System Lamp Monitor 45 1 365 days Time counted by calendar days in any mode
12. ment 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 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 will not come on No power to the thermostat Check for 24 Vac between R or RC If 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 Enter Installer Setup number 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 1412 1 T8624D CHRONOTHERMP IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS Table 6 Troubleshooting Guide
13. our clock 1 24 hour clock format format Not Used 17 thru 18 Extended fan 19 0 No extended fan 1 Fan operation is extended operation in operation after the 90 seconds after the call for heating call for heat ends heat ends Extended fan 20 0 No extended fan 1 Fan operation is extended operation in operation after the 90 seconds after the call for cooling call for cool ends cool ends Not Used 21 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 29 Deadband 30 3 Heating and 4thru 10 Heating and cooling cooling setpoints setpoints can be set no can be set no closer than the chosen closer than 3 F value 1 5 C 4 4 F 2 C 5 5 F 2 5 C 6 6 F 3 C 7 7 F 3 5 C 8 8 F 4 C 9 9 F 4 5 C 10 10 F 5 C Not Used 31 and 32 Minimum off 33 5 5 minutes Othru4 Minimum number of minutes time for the minimum off time 0 thru 5 the compressor compressor for the will be off between calls for compressor the compressor Temperature 34 90 Highest setpoint 40to 89 Temperature range 1 F range stops in setting for heating increments of heating heating setpoint settings Temperature 35 45 Lowest setpoint 46 to99 Temperature range 1 F range stops in setting for coo
14. ppear for approximately three seconds before the number is displayed See Fig 8 and 9 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 V key To exit the Installer Setup press Run Program System Wait EITE SSE Temporary Setting Bue Rue ae GREEN Recovery j IE P Ti WEI AM rl UN of Hold for Jt 1471 JL dar E I 11 FL Fitter EG EXER Days MonTue Wed Thu Fri Sat Sun Repl Batt Room BT i Wake Leave Return Sleep DST WHeatCoolA M14559 Fig 8 Display of all LCD segments INSTALLER SETUP NUMBER DISPLAY COLUMN 2 OF TABLE 3 FACTORY SETTING OR OTHER CHOICE DISPLAY COLUMN 3 OR 5 OF TABLE 3 M14618 Fig 9 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 complete review the settings to confirm that they match the system Table 3 Thermostat Installer Setup Options Installer Setup Other Choices Number Press Factory Setting Press A or V key to change Time A key to Actual Select change Display Description Display Description
15. ptions Using Thermostat Keys The thermostat keys are used to setcurrent day and time program times and setpoints for heating and cooling m temporarily override program temperatures display present setting configure Installer Setup ES m c zt check System Test em esum display outdoor temperature select models set the system operation Cr Em J Fan set the fan operation See Fig 6 for the location of the keys 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 7 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 69 1412 1 M14625 Fig 7 T8624D System and Fan key locations NOTE Always press the keys with your fingertip or similar blunt tool Sharp instruments like a pen or pencil point can damage the keyboard Temperature Settings Refer to Table 2 for the default program If
16. 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 Temperature display is incorrect Room temperature display has been reconfigured Enter Installer Setup number 37 and reconfigure the display 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 will 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 7 to 31 C Cooling limits are 48 to 99 F 9 to 37 C The setpoint temperature range stops were configured Check Installer Setup numbers 34 and 35 and reconfigure the setpoint stops Heating will not come on No power to the thermostat Check for 24 Vac between R and W terminals If 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 equip
17. tall the thermostat about 1 5m 5 ft 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 69 1412 1 T8624D CHRONOTHERMP IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS Wallplate Installation The thermostat can be mounted horizontally on the wall orona2in x4 in 50 8 mm x 101 6 mm wiring box 1 5 METERS 5 FEET Position wallplate horizontally on the wall or on a 2 in x 4 in 50 8 mm x 101 6 mm wiring box M10856 Fig 1 Typical location of thermostat Position and level the wallplate for appearance only The thermostat will function correctly even when not level Use a pencil to mark the mounting holes See Fig 2 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 the drilled holes until flush with the wall Position the wallplate over the holes pulling wires through the wiring opening Loosely insert the mounting screws into the holes Tighten mounting screws op a WIRES Q Y THROUGH WALL
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