Fisher & Paykel DE40F56AW1 Service Manual page 9

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2 PRINCIPLES OF OPERATION
2.1 Vented Dryer
The ambient air is drawn into the cabinet by the fan
which is attached to the motor. This air pressurises
the cabinet and is forced over the heating element
and heated. The heated air then enters from the rear
of the drum and meets with the clothes, with the
humid hot air exiting through the lint filter and exhaust
duct.
3 COMPONENTS
3.1 Mechanical Parts (Dynamic System)
The main motor is attached to the motor brackets by 2 spring clips. In order to drive the drum, a
poly-v belt is used between the motor pulley and drum. The drum is made of pre-painted or
stainless sheet steel. The drum group is mounted into the front bearing housing and the rear
bearing is fixed to the inside rear of the drum by 4 screws and mounted to the heater plate. The
heater is mounted to the rear plate which is held in place by 2 brackets which are mounted to the
wrapper.
3.2 Temperature Sensors & Thermostat
3.2.1 Thermostats
There are 2 thermostats used, with both being located and mounted to the heater plate. These
measure heater temperatures, and thereby control the heater's ON/OFF periods.
These will trip open when they reach 73°C +/- 3°C and will close when they get to 58°C +/- 5°C
3.2.2 Exhaust Sensor ED50F56EW
This is located in the exhaust and sensors the exhaust temperature.
3.3 Heater
A 1750-watt, 2-circuit or 1 circuit, tubular stainless steel element is used which is driven by the
timer for the analogue and by 2 relays in the electronic dryers, with the elements being energized
after the motor has started to run.
.
Drum
Motor
9
Exhausting
Air
Air Inlet
High
Pressure
Air