Installation Instructions
Page 5
... SETTING DECREASE SETTING T8400C, T8401C ELECTRONIC THERMOSTATS 3. Digital display and system switches (FAN and SYSTEM). INDICATOR Set Room ROOM TEMPERATURE SETPOINT TEMPERATURE M14679 To set the °F/°C indication, the heat cycle rate and the C3/C1 temperature control: 1. To set temperature setpoint: 1. If the temperature is off, ▼ turns it on and off. Each press...
... SETTING DECREASE SETTING T8400C, T8401C ELECTRONIC THERMOSTATS 3. Digital display and system switches (FAN and SYSTEM). INDICATOR Set Room ROOM TEMPERATURE SETPOINT TEMPERATURE M14679 To set the °F/°C indication, the heat cycle rate and the C3/C1 temperature control: 1. To set temperature setpoint: 1. If the temperature is off, ▼ turns it on and off. Each press...
Installation Instructions
Page 6
... system turns on initial startup, the T8400C and T8401C Thermostats go into a five-minute delay. When using an electric heat thermostat, the fan starts immediately. 3. Press the ▼ key to raise the temperature setting several degrees below the room temperature. T8400C, T8401C ELECTRONIC THERMOSTATS NOTE: In installer setup mode only, each press of the ▼ key momentarily displays...
... system turns on initial startup, the T8400C and T8401C Thermostats go into a five-minute delay. When using an electric heat thermostat, the fan starts immediately. 3. Press the ▼ key to raise the temperature setting several degrees below the room temperature. T8400C, T8401C ELECTRONIC THERMOSTATS NOTE: In installer setup mode only, each press of the ▼ key momentarily displays...
