Figure 5-32.Door switch and override circuit.
RESIDENTIAL CLOTHES DRYERS
Automatic clothes dryers (fig. 5-34) have two
primary advantages over the old clothesline process.
First, the laundry drying job is much faster with the
automatic dryer. The user does not spend as much
time setting up the process and the actual drying
operation takes less time. The other advantage of an
automatic drying scheme is that it can be used at any
time of the day, in any season of the year, and under any
sort of weather conditions.
Depending on the type of heat energy used,
clothes dryers may be divided into two general
classeselectric dryers and gas dryers. The source of
heat in the electric dryer is obtained electrically by a
heating element mounted in the dryer. A centrally
located thermostat and timer control the heating
Figure 5-34.A typical residential dryer.
element. In a gas dryer, the source of heat is derived
from ignited gas, which is obtained by turning on the
gas flow; however, a pilot light must first be burning in
the combustion chamber. This pilot ignition is
automatic; lighting takes place when a spark is created
by turning a knob usually on the dryer control panel.
All dryers, irrespective of heating methods used,
are equipped with a forced-air blower to draw in fresh
air, force it through a heating assembly, and then
Figure 5-33.Automatic washer installation.