2-13
DEFROST TIMER
The freezer evaporator defrosting system
is actuated by an electric timer. The timer
is mounted in the control housing located
in the fresh food compartment.
1st Click - The timer turns off the compres-
sor and freezer fan circuit for approximately
23 minutes, and it energizes the defrost
heater. Once the temperature of the defrost
termination thermostat reaches the cut-out
point, the termination thermostat will open
the circuit to the radiant heater. However,
the compressor circuit remains open for the
duration of the defrost interval.
2nd Click - The timer switches off the de-
frost circuit and starts the compressor,
freezer fan, and the condenser fan motor.
The compressor and fan motors are now
governed by the temperature control for a
period of approximately 8 hours of the com-
pressor run time, after which a new defrost
cycle begins.
The timer control shaft is designed for
screwdriver advancement. When manually
setting the timer to initiate defrosting, turn
the control shaft clockwise until you estab-
lish the approximate location of the defrost
cycle. Then turn the shaft slowly, and stop
immediately when the first click is heard.
The schematic illustrates the timer circuits
in sequence.
To advance
defrost timer
turn clockwise
Defrost timer mounting screws
Defrost
Timer
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