Honeywell T8524C manual

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Table of contents for the manual

  • Page 1

    X-XX UL INST ALLA TION INSTRUCTIONS ®U.S. Registered Trademark Copyright © 1997 Honeywell Inc. • • All Rights Reserved T8524C,D Multistage Microelectronic Thermostats APPLICA TION The T8524C, D Multistage Microelectronic Thermostat provides electronic control of 24 Vac two-stage heating and two- stage cooling systems. Refer to Table 1 for a g[...]

  • Page 2

    69-1055—1 2 T8524C,D MUL TIST AGE MICROELECTRONIC THERMOST A TS Fig. 1. Typical location of thermostat. Fig. 2. Mounting the wallplate. 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 holes in the wall (if drywall) as marked. For firmer material such as plaster or wood, drill t[...]

  • Page 3

    69-1055-1 3 T8524C,D MUL TIST AGE MICROELECTRONIC THERMOST A TS Fig. 3. Typical hookup of T8524 in a multistage heating and cooling system. Fig. 4. Proper wiring technique. Mounting Thermostat 1. Engage tabs at the top of the thermostat and wallplate. See Fig. 5. 2. Press lower edge of case to close and latch. M4826 FOR WRAPAROUND INSERTION STRIP 7[...]

  • Page 4

    69-1055—1 4 T8524C,D MUL TIST AGE MICROELECTRONIC THERMOST A TS A combination of key presses are required to use the Installer Setup feature. — To enter the Installer Setup mode, press and hold the Information i key with the increase ▲ and decrease ▼ keys until the first number is displayed. All display segments appear for approximately thr[...]

  • Page 5

    69-1055-1 5 T8524C,D MUL TIST AGE MICROELECTRONIC THERMOST A TS Table 2. Thermostat Installer Setup Options. a Available on select models. b Installer Setup Number 02 must be set to 01 to extend fan operation. (Continued) Installer Setup Number (Press i key Factory-Setting Other Choices (Press ▲ or ▼ key to change) Actual Select to change) Disp[...]

  • Page 6

    69-1055—1 6 T8524C,D MUL TIST AGE MICROELECTRONIC THERMOST A TS Installer Setup Number (Press i key Factory-Setting Other Choices (Press ▲ or ▼ key to change) Actual Select to change) Display Description Display Description Setting Heating setpoint range stop a 34 90 Heating setpoint can be set no higher than 90°F 40 thru 90 Number can be se[...]

  • Page 7

    69-1055-1 7 T8524C,D MUL TIST AGE MICROELECTRONIC THERMOST A TS a System fan is energized only if set for electric heat. Thermostat Information 1. Press the Information i key to access the thermostat information. Table 4. Installer System Test Options. 2. Press the increase ▲ key to display the production date code. The first two large digits are[...]

  • Page 8

    69-1055—1 8 T8524C,D MUL TIST AGE MICROELECTRONIC THERMOST A TS 3. Press the increase ▲ key again to display the software identification code. (Example: 02 = software ID code 2) M6791 M4866 M4867 4. Press the increase ▲ key again to display the software revision number. (Example: 001 = revision number 1) 5. Press the increase ▲ key again to[...]

  • Page 9

    69-1055-1 9 T8524C,D MUL TIST AGE MICROELECTRONIC THERMOST A TS Symptom Possible Cause Action Heating will not come on. No power to the thermostat. • Check that C terminal is connected to the system transformer. • Check for 24 Vac between C and R or RH terminals. — If missing 24 Vac: — check if the circuit breaker is tripped—reset the cir[...]

  • Page 10

    69-1055—1 10 T8524C,D MUL TIST AGE MICROELECTRONIC THERMOST A TS[...]

  • Page 11

    69-1055-1 11 T8524C,D MUL TIST AGE MICROELECTRONIC THERMOST A TS[...]

  • Page 12

    69-1055—1 12 T8524C,D MUL TIST AGE MICROELECTRONIC THERMOST A TS Home and Building Control Honeywell Limited-Honeywell Limitée 155 Gordon Baker Road North York, Ontario M2H 3N7 Home and Building Control Honeywell Inc. Honeywell Plaza P.O. Box 524 Minneapolis, MN 55408-0524 69-1055—1 J.H. Rev . 6-97 www .honeywell.com/yourhome[...]