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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 as-
sists 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.
Drain Pan Valve
Figure 12: Heating Element
HEATING ELEMENT
(“WE” &”WY” Electronic and Electromechanical Models)
All “WE” and “WY” models are equipped with a 3.3 KW
heating element.
The heating element has two heater limit switches
(bimetal thermostats) connected in series with it. The
number 1 limit located near the bottom, will open the
circuit when the temperature reaches 130°F +/-5°. The
number 2 is a high limit switch near the top of the
element. It is designed to open the circuit at 165°F +/-8°.
Should the fan motor fail or filter become clogged etc.,
the high limit switch will open and interrupt the power to
the heater before reaching an unsafe temperature
condition.
Test the heater element for continuity below 130°F. The
element’s resistance value is 13.7 Ohms +/-5%.
Not actual element - for reference only