15
920-087-02 (9-03)
E. Heating Control (heat pumps and emergency heat operation)
F. Fan Cycle Switch
The fan cycle switch is located behind the decorative front cover
below the control panel. It is designed to operate the fan either
continuously or intermittently with the compressor or heating
elements. When the switch is in the CONTINUOUS position, the
fan will run continuously at the selected speed when the unit is
turned on. With the fan cycle switch in the CYCLE position, the fan
will run only when the compressor or heating elements cycle on.
NOTE: Emergency heat operation only. In the event of a compressor malfunction in the heat pump mode, turn the screw to the extreme
counterclockwise emergency heat position. The heater will then cycle using electric resistance heat only. Note that in the emergency
heat position, the compressor is locked out, disabling both heat pump and cooling operations. CALL A SERVICE PERSON. DO NOT
FORGET TO RETURN THE CONTROL TO ITS ORIGINAL POSITION AFTER REPAIRS ARE MADE OR THE COMPRESSOR WILL
NOT COME ON IN COOLING MODE.
NOTE: Heat pump models only. Heat pump equipped models use
backup electric resistance heating coils. At extremely low, outdoor
ambient temperatures, the heat pump is automatically disabled and
the unit operates solely on electric resistance heat.
This control is located behind the decorative front cover and is found
on the right side panel of the chassis. Its function is to allow you to
set the temperature range in which the heat pump operates. This
control switches the unit heat operation between heat pump and
electric resistance heat based on the outdoor ambient temperature.
These change-over temperatures are based on the settings of the
control. The factory setting is at the one o'clock position. If you wish
to change the factory set point, insert a at-bladed screwdriver into
the slot and turn counterclockwise to increase the changeover set
point, or clockwise to decrease it.
NOTE: The factory set point is recommended for optimum
performance.
NOTE: It is recommended that this switch be set in the continuous position for maximum comfort and temperature control.
The vent control lever is located behind the front cover on the left
side of the unit. The unit is shipped in the closed position with a
locking screw in place. The screw must be removed to operate the
lever. When the lever is back, (OPEN), outside air is mixed with
indoor air. When the lever is forward, (CLOSED), no outside air is
admitted into the room and room air is recycled through the unit.
G. Fresh Air Vent Control
NOTE: The vent should remain closed for peak operating efciency.
