Comfort Stat CDT901 - Manual (Page 64)

CDT900 Series Touchscreen Programmable Thermostata
System and Fan Settings
System
The System key selections vary based on your heating and/or cooling system type.
Heat Thermostat controls the heating system.
Off Both heating and cooling systems are off.
Cool Thermostat controls the cooling system.
Auto Thermostat automatically changes between heating and cooling operation,
depending on indoor temperature.
Emer Emergency heat cycles to maintain temperature. Compressor is locked out (used
only for 2H/1C or 3H/2C heat pump systems) and auxiliary heat turns on as second stage if
needed.
Fan
The Fan key selections vary based on the heating and/or cooling system type.
On Fan runs continuously. Use this setting for improved air circulation or for more efficient
central air cleaning.
Auto Fan follows the fan program schedule.
Circ Fan runs randomly approximately 35% of the time when the equipment no
requirement. Use this setting for improved air circulation or for more efficient central air
cleaning when you do not want the fan running continuously.
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