42 PB
COMPONENTS TESTING
Drain Pan Valve
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment with
power applied.
Failure to do so could result in serious injury or
death.
During the cooling mode of operation, condensate which collects in the drain pan is picked up by the con-denser 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 tempera-
ture rises above 40°F to fully close at 60°F.
To test the drain pan valve;
1) Place a pack of ice on the capillary
2) Ensure that the valve opens as it cools down.
3) remove the pack of ice.
4) Ensure that the valve closes fully as the valve warms back up.
Bellows Assembly
Drain Pan Valve
Figure 609 Drain Pan Valve
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