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Honeywell T8624D manual

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Table of contents for the manual

  • Page 1

    T8624D Chronotherm ® IV Deluxe Programmable Thermostat PRODUCT DA T A ® U.S. Registered Trademark Copyright © 1997 Honeywell Inc. • All Rights Reserved APPLICA TION The T8624D Chronother m® IV Delux e Programmable Thermostat provides electronic control of 24 V ac multistage heating and cooling systems. FEA TURES • Full seven-da y program ca[...]

  • Page 2

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 2 ORDERING INFORMA TION When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor , ref er to the TRADELINE® Catalog or price sheets for complete ordering number . If you ha ve additional questions, need further information, or would[...]

  • Page 3

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 3 Dimensions: See Fig. 1. INST ALLA TION When Installing this Product… 1. Read these instructions carefully . F ailure to follo w the instructions can damage the product or cause a hazardous condition. 2. Check the r atings given in the instructions and on the product to make [...]

  • Page 4

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 4 Fig. 2. T ypical location of thermostat. Fig. 3. Mounting the wallplate. 5 FEET [1.5 METERS] YES NO NO NO M10106 WIRING All wiring must comply with local electrical codes and ordinances. Follow equipment man ufacturer wiring instructions when av ailable. Refer to Fig. 14 f or [...]

  • Page 5

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 5 Ta b le 4. T erminal Designations and Descriptions. Fig. 4. Pr oper wiring technique. Mounting Thermostat W allplate The thermostat mounts on the wallplate after they are installed. 1. Engage tabs at the top of thermostat and wallplate. See Fig. 5. 2. Press lower edge of case [...]

  • Page 6

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 6 SETTINGS Using Thermostat Keys The thermostat keys are used to: • set current da y and time, • program times and setpoints f or heating and cooling, • temporarily ov erride program temperatures, • displa y present setting, • configure Installer Setup , • check Syst[...]

  • Page 7

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 7 NO TE: Alwa ys press the keys with y our finger tip or similar b lunt tool. Shar p instr uments like a pen or pencil point can damage the ke yboard. Te mperature Settings Ref er to T able 5 f or the def ault program. If the da ytime energy savings period is not used, press the[...]

  • Page 8

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 8 Ta b le 6. Thermostat Installer Setup Options. Installer Setup Number (Press Time ▲ key to Factory-Setting Other Choices (Press ▲ or ▼ key to change) Actual Select change) Display Description Display Description Setting Not used 1 thru 3 — — — — — Heating cycle[...]

  • Page 9

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 9 Ta b le 6. Thermostat Installer Setup Options (continued). IMPORT ANT Re view the settings to confir m that they match the system. Press Run Program to e xit the Installer Setup . The ther mostat has sav ed the Installer Setup changes and initiated a reset in order to operate [...]

  • Page 10

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 10 2. Press Da y until the current day is displa yed. NO TE: Sun=Sunda y , Mon=Monday , T ue=T uesday , W ed=Wednesda y , Thu=Thursday , F ri=F r iday , Sat=Saturda y . Fig. 10. Displa y of all the segments of the LCD. M10313 Time Set Program System Fan Run Program Hold Temp Set[...]

  • Page 11

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 11 Ta b le 8. Installer System T est Options. 3. Press the increase ▲ ke y again to display the softw are identification code. (Example: 02 = software ID code 2) NO TE: Press any ke y and the display ed numbers will change. Press Time ▼ ▼ to go to the pre vious test and Ti[...]

  • Page 12

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 12 PROGRAMMING The ke yboard is located behind the ther mostat cov er with three frequently used ke ys by the displa y . The ther mostat displa y shows day , time, program period, temperature , system and f an operation selection. The thermostat can be set for f our times and up[...]

  • Page 13

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 13 Setting the Current Day and T ime IMPORT ANT Alwa ys press the ke ys with your finger tip or similar blunt tool. Shar p instr uments like pens and pencil points can damage the ke yboard. 1. Press Set Current Da y/Time. NO TE: On initial power up or after an e xtended pow er l[...]

  • Page 14

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 14 5. Press Heat/Cool Settings to s witch to other system temperature setpoint. NO TE: The progr am times are the same for both heating and cooling. 3. Press Cop y . M10321 Time Set Program System Fan Run Program Hold Temp Set Current Day/Time Wake Leave Return Sleep Day Heat/Co[...]

  • Page 15

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 15 4. Repeat steps 2 and 3 f or all the per iods to be cleared. 5. Press Run Program. Setting T emporary T emperatures Changing T emperature Setting Until the Next Program Period Press increase ▲ or decrease ▼ ke y until the desired temperature setpoint is displa yed. NO TE:[...]

  • Page 16

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 16 6. Press increase ▲ or decrease ▼ ke y to adjust the temperature setting, if desired. (Example: Cool 84 ° = cooling equipment will operate when the room temperature is abo ve 84 ° F) NO TE: In this e xample, the ther mostat uses the Hold setting f or eighteen days and r[...]

  • Page 17

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 17 Operation Sequence The thermostat energizes specific ter minals depending what the F an and System are set to . The LCD will display the time , room temperature, system and f an selection. Symbols will be displa yed when the heating, cooling or f an is energized. See Ta b le [...]

  • Page 18

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 18 TROUBLESHOOTING GUIDE Ref er to T able 12 f or troub leshooting information. Ta b le 12. T roubleshooting Inf ormation. Symptom Possible Cause Action Display will not come on. Thermostat is not being powered. • Check for 24 Vac between R and C terminals. — If missing 24 V[...]

  • Page 19

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 19 CROSS REFERENCE Ref er to T able 13 f or thermostat cross referencing inf or mation. Ta b le 13. Thermostat Cross Reference Inf ormation. Model Number Description TRADELINE  Replacement Remarks T8624C Two-stage heat and two-stage cool conventional t hermostat; powered dire[...]

  • Page 20

    T8624D CHRONO THERM ® IV DELUXE PROGRAMMABLE THERMOST A T 68-0166—1 20 Honeywell Europe S.A. 3 Avenue du Bourget 1140 Brussels Belgium Honeywell Asia Pacific Inc. Room 3213-3225 Sun Hung Kai Centre No. 30 Harbour Road Wanchai Hong Kong Home and Building Control Honeywell Limited-Honeywell Limitée 155 Gordon Baker Road North York, Ontario M2H 3N[...]