Friedrich WallMaster WCVT12B30A handleiding

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Handleiding

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COMPONENTS TESTING

Heating Element

All heat pumps and electric heat models are equipped with a heating element.

The heating element contains a fuse link and a heater limit switch. The fuse link is in series with the power supply and will open and interrupt the

power when the temperature reaches 199°F or a short circuit occurs in the heating element. Once the fuse link separates, a new heater element

must be installed.

NOTE: Always replace the heating element with the exact replacement.

The heater element has a high limit control. This control is a bimetal thermostat mounted in the top of the heating element.

Should the fan motor fail or lter become clogged, the high limit control will open and interrupt power to the heater before reaching an unsafe

temperature condition.

The control is designed to open at 110°F ±6°F. Test continuity below 110°F or when it is cooled off.

HEATING ELEMENT

The heating element is energized by an outdoor thermistor via the electronic control board. The outdoor defrost thermistor is adjusted at a

predetermined temperature of approximately 30 degrees Fahrenheit and sensed for two consecutive minutes, to stop the compressor and turn on

the heating element.

KHVS10B11A KHVQ10B11A KHVS12B33A WHVT14B33A KHVM24B34A KHVL28B35A

kW 1.15 1.15 3.3 3.4 4.0 5.2

cold resistance

(ohms)

10.11 +- 3% 10.11 +- 3% 14.10 +-3% 13.7 +- 3% 11.63 +-3% 8.95 +- 3%

TESTING THE HEATING ELEMENT

Testing of the elements can be made with an ohmmeter across the terminals after the connecting wires have been removed.

Drain Pan Valve

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 con-denser 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.

Heating Element

Example

Figure 705 (Heating Element)

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.

Bellows Assembly

Drain Pan Valve

Figure 706 Drain Pan Valve

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