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DRAIN PAN VALVE
During the cooling mode of operation, condensate which
collects in the drain pan is picked up by the condenser fan
blade and sprayed onto the condenser coil. This assists
in cooling the refrigerant plus evaporating the water.
During the heating mode of operation, it is necessary that
water be removed to prevent it from freezing during cold
outside temperatures. This could cause the condenser
fan blade to freeze in the accumulated water and prevent
it from turning.
To provide a means of draining this water, a bellows type
drain valve is installed over a drain opening in the base
pan.
This valve is temperature sensitive and will open when
the outside temperature reaches 40°F. The valve will
close gradually as the temperature rises above 40°F to
fully close at 60°F.
TESTING THE HEATING ELEMENTS AND
LIMIT SWITCHES
Testing of the heating elements can be made with an
ohmmeter or continuity tester across the terminals after
the power wires have been removed. Test the limit switch
for continuity across its input and output terminals.Test
below the limit switch’s reset temperature.
HEATER ELEMENTS AND LIMIT SWITCHES’
SPECIFICATIONS
All heat pumps and electric heat models are equipped
with a heating element and a limit switch (bimetal ther-
mostat). The limit is in series with the element and will
interrupt the power at a designed temperature.
Should the blower motor fail, lter become clogged or air-
ow be restricted etc., the high limit switch will open and
interrupt the power to the heater before reaching an un-
safe temperature condition.
Bellows Assembly
Drain Pan Valve
COMPONENTS TESTING (Continued)
ELECTRIC SHOCK HAZARD
WARNING
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
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