Page 2 - T8524C,D MULTISTAGE MICROELECTRONIC THERMOSTATS; through the wiring opening.; WIRING; CAUTION; prevent drafts from affecting the thermostat.
69-1055—1 2 T8524C,D MULTISTAGE MICROELECTRONIC THERMOSTATS 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. Forfirme...
Page 3 - Fig. 3. Typical hookup of T8524 in a multistage; Mounting Thermostat; Engage tabs at the top of the thermostat and; Using Thermostat Keys; SETTINGS; System and Fan Settings
69-1055-1 3 T8524C,D MULTISTAGE MICROELECTRONIC THERMOSTATS 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...
Page 4 - IMPORTANT; Temperature Settings; INSTALLER SETUP
69-1055—1 4 T8524C,D MULTISTAGE MICROELECTRONIC THERMOSTATS A combination of key presses are required to use theInstaller Setup feature.— To enter the Installer Setup mode, press and hold theInformation i key with the increase ▲ and decrease ▼ keys until the first number is displayed. All display se...
Page 6 - INSTALLER SYSTEM TEST
69-1055—1 6 T8524C,D MULTISTAGE MICROELECTRONIC THERMOSTATS Installer Setup Number (Press i key Factory-Setting Other Choices (Press ▲ or ▼ key to change) Actual Select to change) Display Description Display Description Setting Heatingsetpoint rangestop a 34 90 Heating setpoint can beset no higher t...
Page 7 - Thermostat Information
69-1055-1 7 T8524C,D MULTISTAGE MICROELECTRONIC THERMOSTATS 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 producti...
Page 8 - CHECKOUT
69-1055—1 8 T8524C,D MULTISTAGE MICROELECTRONIC THERMOSTATS 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)...
Page 9 - Symptom
69-1055-1 9 T8524C,D MULTISTAGE MICROELECTRONIC THERMOSTATS Symptom Possible Cause Action Heating will notcome on. No power to the thermostat. • Check that C terminal is connected to the systemtransformer. • Check for 24 Vac between C and R or RH terminals.— If missing 24 Vac: — check if the circuit...
Page 12 - Home and Building Control
69-1055—1 12 T8524C,D MULTISTAGE MICROELECTRONIC THERMOSTATS Home and Building Control Honeywell Limited-Honeywell Limitée155 Gordon Baker RoadNorth York, OntarioM2H 3N7 Home and Building Control Honeywell Inc.Honeywell PlazaP.O. Box 524Minneapolis, MN 55408-0524 69-1055—1 J.H. Rev. 6-97 www.honeywe...