THE CONTROL BOX ASSEMBLY
The control box assembly is a device which
converts an electrical impulse into a mechanical
action. The mechanical action, stemming from the
sudden release of a spring loaded system of
levers, shuts off the steam supply, exhausts the
steam from the cooking chamber, switches off a
pilot light, and sets off a buzzer. This action is
preset manually, with the simple action of setting
the timer to the cooking timer required and pulling
out the operating handle into the "on" position.
The illustrations of "on" and "off" positions will
serve to familiarize you with the proper
relationship of the inner parts of the control box
assembly.
HOW IT WORKS
When in "off" position; the valve will be closed re-
stricting the steam from passing into the cooking
compartment, the pilot light will be off, the buzzer
inactive and the solenoid de-energized.
When the timer is set for the required cooking time
and the operating handle is pulled to the "on"
position; the valve will be opened to allow steam
into the cooking compartment, the pilot light will
light up, signifying
that
cooking is taking place, the
buzzer and solenoid will still be de-energized.
When the cycle on the timer clock has been
completed, a flow of current will energize the solenoid
forcing the solenoid push rod to lift and disengage the
operating handle. The operating handle now freed
from the bumper and stop bar will spring back to the
"off" position. The innermost micro-switch, released
from the pressure of the pin of the operating handle
will break the circuit to the solenoid, and the pilot light
and the solenoid both will become inactive. The
nearer solenoid having been pushed into a locked
position under the buzzer lock will remain in contact
operating the buzzer until released by pushing the
buzzer release knob by hand.
TROUBLE-TEST AND REMEDIES
If the operating handle will not lock in the "on"
position:
Check first that timer has been set. Check that
the stop bar is properly secured.
Check that solenoid and bracket is positioned
properly.
If the operating handle fails to retract to "off" position:
Check the valve synchronizer spring for
looseness. Check all linkage for binding or
loosened parts.
Check switch on timer for continuity.
Check micro switch for bent arm.
Check for blown fuse and then for defective
wiring or defective solenoid.
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