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Honeywell t8624d manual

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Table of contents for the manual

  • Page 1

    ® U.S. Regi stered T rademar k Copyright © 2002 Honeywe ll • • All Rights Reserved INSTALLATION INSTRUCTIONS 69-1412-1 T8624D Chronotherm ® IV Deluxe Programmable Multistage Thermostats APPLICATION The T8624D Chron otherm® IV Deluxe Prog rammable Multistage Thermostats provides electronic control of 24 V ac single-zone m ultistage systems. [...]

  • Page 2

    T8624D CHRONOTHERM ® IV DELUXE PROGRAM MABLE MULTISTAGE THERMOSTATS 69-1412—1 2 Wallplate Installation The ther mostat can be mount ed horizontal ly on the wall or on a 2 in. x 4 in. (50.8 mm x 101.6 m m) wiring box. Position wallplate h orizontally on the wall o r on a 2 in. x 4 i n. (50.8 mm x 101.6) mm w iring bo x. Fig. 1. T ypic al locatio [...]

  • Page 3

    T8624D CHRONOTHERM ® IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS 3 69-1412—1 Fig. 3. T ypi cal hookup of T8624D in a heat pump sy stem. Fig. 4. Correct wi ring technique. Mounting Thermosta t 1. Engage t abs at the top of the th ermostat and wal l- plate. See F ig. 5. 2. Press lower edge of case to close and latch. NOTE: T o remove the thermos[...]

  • Page 4

    T8624D CHRONOTHERM ® IV DELUXE PROGRAM MABLE MULTISTAGE THERMOSTATS 69-1412—1 4 Fig. 6. T8624D k ey locations and descript ions. Using Thermostat Keys The thermo stat keys are use d to: • set curr ent day and t ime, • program ti mes and setpoint s for heating and c ooling, • temporar ily override prog ram temper atures, • display prese n[...]

  • Page 5

    T8624D CHRONOTHERM ® IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS 5 69-1412—1 INSTALLER SETUP NOTE: For most applicat ions, the therm ostat factory- settings will not ne ed to be chan ged. Review the facto ry settings in T abl e 2 and if no changes are necessary , go to the In staller System T e st section. The Installer Setup is used to cus to[...]

  • Page 6

    T8624D CHRONOTHERM ® IV DELUXE PROGRAM MABLE MULTISTAGE THERMOSTATS 69-1412—1 6 Adaptive Intelligent Recov ery™ control. 13 0 Adaptive Intelligent Recovery™ control is activa ted (system starts early so setpoint is reached by start of program per iod). 1 Conve ntional recover y (system start s recovery at programmed time). — Degree tempera[...]

  • Page 7

    T8624D CHRONOTHERM ® IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS 7 69-1412—1 IMPORT A NT Review the setting s to confirm th at they match the system. Pres s Run Progra m to exit the Inst aller Setup. The thermostat ha s saved the Inst aller Setup c hanges and initia ted a reset in order to ope rate using the new setting s. Be sure to set the c[...]

  • Page 8

    T8624D CHRONOTHERM ® IV DELUXE PROGRAM MABLE MULTISTAGE THERMOSTATS 69-1412—1 8 NOTE: If the current tim e is Daylight Savings Time, press Daylight Time until DST is displayed. 4. Press Run Prog ram. Viewing or Resetting Timer Settings When the thermo stat activates a timer, the thermostat flashes Filter un til the timer resets. 1. Reset the tim[...]

  • Page 9

    T8624D CHRONOTHERM ® IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS 9 69-1412—1 T able 5. In staller System T e st Option s. NOTE: Press a ny key and the disp layed number s will change. Press Time ∇ to go to the previous test and Time ∆ to go to the next te st. The Run Program key will not e xit this test. Press Time ∆ or T ime ∇ and the[...]

  • Page 10

    T8624D CHRONOTHERM ® IV DELUXE PROGRAM MABLE MULTISTAGE THERMOSTATS 69-1412—1 1 0 THERMOSTAT INFORMATION 1. Press the Time ∆ key to access the thermostat information. 2. Press the increase ! ke y to display the produ ction date code. Th e first two lar ge digits are the m onth and the thi rd digit is the la st digit of the year (Exam- ple: 027[...]

  • Page 11

    T8624D CHRONOTHERM ® IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS 1 1 69-141 2—1 TROUBLESHOOTING GUIDE T able 6. T roubleshooting Gu ide. Symptom Possible Ca use Action Display will not come on. Thermostat is not be ing powered. • Check for 24 V ac between R and C terminals. — If missing 24 V ac: — check if the cir cuit breaker is tr ippe[...]

  • Page 12

    69-1412—1 G .H. Rev . 12-02 www .ho neywell.com/yourhome T8624D CHRONOTHERM ® IV DELUXE PROGRAM MABLE MULTISTAGE THERMOSTATS Automation and Control Solutions Honeywell Honeywell Li mited-Honeywell Limi tée 1985 Dougla s Drive North 35 Dynamic Dri ve Golden Vall ey, MN 55422 Scarborough , Ontario M1V 4Z9 System on indicator (flame=heat, snowflak[...]