Installer Guide 18
• Turn on the power to the Heating/Air Conditioning (or Heat Pump for
PSP2100) system.
• On the thermostat, slide the Mode Switch to HEAT. Press the COOLER
or WARMER button until the set temperature is 10 degrees above room
temperature. The HVAC unit should energize in the heating mode (Page
6). Note: You may need to wait up to ve minutes for heating to
energize due to the compressor lockout feature. There is a two minute
minimum run-time for rst stage heating.
• On the thermostat, slide the Mode Switch to COOL. Press the COOLER
or WARMER buttons until the set temperature is 10 degrees below room
temperature. The HVAC unit should energize in the cooling mode (Page 6).
Note: You may need to wait up to ve minutes for cooling to energize
due to the compressor lockout feature.
• Keep the old thermostat for reference purposes, until your new thermostat
is functioning properly.
• On the thermostat, slide the Mode Switch to OFF. Slide the Fan Switch to
Fan On. The fan should turn on and run continuously (Page 6).
6 Test Operation
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