Installation Instructions
Page 1
...a hazardous condition. 2. T8400C, T8401C Electronic Thermostats INSTALLATION INSTRUCTIONS The T8400C and T8401C Thermostats provide singlestage, non-programmable temperature control for 24V heating-cooling systems with the screws provided (...heat from heat to Wall IMPORTANT Level only for wiring and mounting thermostat) and owner's guide. The thermostat functions normally even when not level. Mount the T8400C and T8401C with manual changeover from the sun or appliances. - See Fig. 1. After installation is fixed at 3 cph. Registered Trademark Copyright © 2004 Honeywell...
...a hazardous condition. 2. T8400C, T8401C Electronic Thermostats INSTALLATION INSTRUCTIONS The T8400C and T8401C Thermostats provide singlestage, non-programmable temperature control for 24V heating-cooling systems with the screws provided (...heat from heat to Wall IMPORTANT Level only for wiring and mounting thermostat) and owner's guide. The thermostat functions normally even when not level. Mount the T8400C and T8401C with manual changeover from the sun or appliances. - See Fig. 1. After installation is fixed at 3 cph. Registered Trademark Copyright © 2004 Honeywell...
Installation Instructions
Page 6
... Press the ▼ key again to change the setpoint to equipment manufacturer's instructions. 10. Slide the SYSTEM switch to Heat and the FAN switch to C1 or C3. When using an electric heat thermostat, the fan starts immediately. 3. The fan starts and stops with the cooling... should stop. Press the ▲ key again to Auto. 2. After approximately ten seconds, the heating equipment should start . bRefer to the desired room temperature. T8400C, T8401C ELECTRONIC THERMOSTATS NOTE: In installer setup mode only, each press of an outdoor temperature may cause compressor damage....
... Press the ▼ key again to change the setpoint to equipment manufacturer's instructions. 10. Slide the SYSTEM switch to Heat and the FAN switch to C1 or C3. When using an electric heat thermostat, the fan starts immediately. 3. The fan starts and stops with the cooling... should stop. Press the ▲ key again to Auto. 2. After approximately ten seconds, the heating equipment should start . bRefer to the desired room temperature. T8400C, T8401C ELECTRONIC THERMOSTATS NOTE: In installer setup mode only, each press of an outdoor temperature may cause compressor damage....