Honeywell CT3451 Owner's Manual - Page 10

CT3451 PROGRAMMABLE THERMOSTAT System Switch ❑ The System switch settings control thermostat operation as follows: Cool: The thermostat controls the cooling system. Off: Both heating and cooling are off. Heat: The thermostat controls the heating system. ❑ Slide the System switch on the thermostat to the desired system setting. Heat and Cool Indicators indicates a call for heat. indicates a call for cool. NOTE: In the programming mode, the and the indicate System setting. Minimum Off-Timer The thermostat minimum off-timer assures that the compressor does not come on again for at least five minutes after it turns off. The minimum off-timer is triggered when the compressor turns off and when the System switch position is changed. If the compressor turns off when the setpoint is changed, the minimum off-timer is triggered. A flashing snowflake is in effect. indicates the minimum off-timer 12 CHECK OPERATION AFTER INSTALLATION/PROGRAMMING Heating System ❑ Slide the System switch to Heat and the Fan switch to Auto. ❑ Press and hold the ▲ key to raise the temperature several degrees above the room temperature to start the heating equipment. When using the thermostat with the Fuel switch set to the E position for electric heat, the fan starts immediately. ❑ Press the ▼ key to lower the temperature setting below the room temperature. The heating equipment should shut down. Cooling System CAUTION Compressor Damage Hazard. Operating at too low of an outdoor temperature can cause compressor damage. Do not operate cooling if outdoor temperature is below 50°F (10°C). Allow compressor to remain off for five minutes before restarting. Refer to manufacturer's recommendations. 1. Slide the System switch to Cool and the Fan switch to Auto. 2. Press the ▼ key to lower the temperature setting several degrees below the room temperature; the cooling equipment should start. The fan starts and stops with the cooling equipment. NOTE: If the cooling system does not start immediately, remember that the thermostat has a built-in minimum off-time of five minutes to protect the compressor. 3. Press the ▲ key to raise the temperature setting above the room temperature. Cooling system should shut down. Fan ❑ Slide the System switch to Off and the Fan switch to On. The fan should run continuously. ❑ Slide the Fan switch to Auto. The fan should turn off. Backlighting ❑ Press any key to light the display for approximately ten seconds. 69-1620-1 10