set-point. When the thermostat calls for heat, the display will show Heat On. If the Heat On display is flashing, the
compressor lockout feature is operating in the heat pump mode. (Note: See Configuration menu item 7).
The Aux heating will activate when the room temperature is 2°F (1.0°C) below setpoint temperature. When Aux
heating turns on, AUX 1+2 will be displayed. Note: Aux heating can also be configured to turn on at 10ºF below Setpoint
– see the configuration menu 8.
Cooling System
CAUTION: To prevent compressor and/or property damage, if the outdoor temperature is below 50ºF (10ºC), DO
NOT operate the cooling system.
1. Move the SYSTEM switch to the COOL position.
2. When the (FA)st cooling cycle rate is selected in the configuration menu, (see configuration menu item 2), the
thermostat will call for cooling at 0.5ºF (0.5ºC) above set-point, and turn off at set point. When the (SL)ow cool cycle
rate is selected, the thermostat will call for cooling at 1.5ºF (1.5ºC) above set-point, and turn off at set-point. When the
thermostat calls for cooling, the display will show COOL On. If the COOL On display is flashing, the compressor lockout
feature is operating. (Note: See Configuration menu item 7). If all functions operate properly, the thermostat is
installed correctly.
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