Friedrich 2009, 2008 service manual Heating Element, Drain Pan Valve

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%.

Figure 12: Heating Element

Not actual element - for reference only

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

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