Owner's Manual
Page 1
...you are awake and at a comfortable level when you do not press any button for five seconds. 1.7 Built-in compressor protection Your thermostat has a feature that helps prevent damage to the compressor of your air conditioning system. To view the setpoint temperature, press either button more...; Cool: System is in Cooling mode. • Off: System is off. • Heat: System is in heating mode). RTH221 RTH221 User Guide Programmable Thermostat 1.5 Fan switch Use the Fan switch to select the fan operation. • Auto: The fan runs only when heating or cooling is normally displayed....
...you are awake and at a comfortable level when you do not press any button for five seconds. 1.7 Built-in compressor protection Your thermostat has a feature that helps prevent damage to the compressor of your air conditioning system. To view the setpoint temperature, press either button more...; Cool: System is in Cooling mode. • Off: System is off. • Heat: System is in heating mode). RTH221 RTH221 User Guide Programmable Thermostat 1.5 Fan switch Use the Fan switch to select the fan operation. • Auto: The fan runs only when heating or cooling is normally displayed....