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The subbase fan switch controls fan
operation as follows:
ON—Fan operates continuously.
AUTO—Fan operates with cooling equip-
ment as controlled by the thermostat or
with the heating equipment as controlled
by the plenium fan switch. In electric
heat, heat pump, and fan coil systems,
the fan is controlled by the thermostat in
heating and cooling.
To switch positions, use thumb or index
finger to slide lever to desired position. Stop
switch lever in detent over the desired function
indicator mark for proper circuit operation.
Setting Subbase Switches
(If Applicable)
The subbase system switch controls system
operation as follows:
HEAT—Heating system is controlled by the
thermostat. Cooling system is off.
COOL—Cooling system is controlled by the
thermostat. Heating system is off.
OFF—Both the heating and cooling systems
are off. If the fan switch is in the AUTO
position, the fan is also off.
ON—In a cooling only application, only
cooling operates. In a heating only
application, only heating operates.