Low Water Cut-Off - Market Forge Industries ST-E Service & Parts Manual

CLEANING EXHAUST SILENCER
The Exhaust Silencer should be removed and cleaned periodically
As the cooking chamber is exhausted of steam through the silencer,
impurities can build up from food particles Cleanings should be
frequent enough to prevent clogging to occur For this reason, the
Exhaust Silencer is made easily accessible and simple to remove To
Clean
1 Remove the one-piece Exhaust Silencer from the unit by
unscrewing it in a counter-clockwise direction
2 Clean the Silencer by sloshing it in hot soapy water and rinse it in
clear water If dirt has clogged the Silencer, presoak it in an
alkaline cleaning solution
3 After cleaning stand the silencer on edge to allow it to drain
4 Screw it back into the elbow of the Exhaust Valve (Clockwise)

LOW WATER CUT-OFF

the Low Water Cut-Off is mounted above the timer assembly under
the front lower panel with its thermostat bulb extending and inserting
into a channel provided for it at the outer edge of the cast-in heating
elements It functions as a safety feature to shut off the complete unit
in event the water runs dry
HOW IT WORKS
If the Steam-It operated with no water or the water has evaporated
away, the temperature of the cooking cylinder will rise and by heat
induction effect the thermostat bulb of the Low Water Cut-Off
Electric current flow will be broken at the Low Water Cut-Off and the
unit will shut down With the replacement of water into the cooking
cylinder, the thermostat bulb will be cooled and the unit will then
again be operative after the reset button has been pressed If the unit
does not start after pressing the reset button, more time will have to
be allowed for further cooling
NOTE:
Should a cooking cycle be started with insufficient water, and
interrupted due to safety action of the Low Water Cut-Off, the food in
the process of cooking will be affected Proper compensation will
have to be made for the cooking performed and, with proper amount
of water in the cooking cylinder, a new cycle determined and set to
complete the process
TIMER
The Timer, located at the lower right front of the Steam-It, provides a
means of manual control The Steam-It is put into an automatic cycle
of cooking with the setting of the Timer to any of its calibrated
periods of cooking Its timing cycle, however, is automatically
delayed by the Timer Control Switch until free-venting has occurred
and a cylinder pressure build-up to 10 PSI has been reached
TROUBLE TESTS AND REMEDIES
If the Timer should fail to operate the Steam-It and a check shows
all wiring to be in good order, and should the Timer Control Switch
be found in good order as ascertained by a continuity check, the
Timer must be regarded as defective and must be replaced The
Timer is replaceable only as a complete unit
TIMER CONTROL SWITCH
The Timer Control Switch, located under the removable front lower
panel Just right of center, automatically delays the timer count-down
at the beginning of the cycle until the Steam-It has fully free-vented
out all cold air from within the cooking cylinder and pressure has
reached 10 PSI This delay insures the timer to count only that
portion of the cycle when cylinder steam pressure is actually acting
on the foods This, of course, is important when processing foods
which only require very short periods of cooking time
HOW IT WORKS
The copper tube which extends from the top of the cylinder to the
rear portion of the Timer Control Switch constantly reflects internal
cylinder steam pressures upon the Timer Control Switch's built-in
bellows While cylinder free-venting is occurring, the switch keeps
the timer circuit open After free-venting has terminated and when
the cylinder pressure has built-up to approximately 10 PSI, the
contacts will be forced closed by back-pressures working on the
bellows, the timer circuit will be completed, and the timer will then
start its countdown
DIAL ADJUSTMENTS (Refer to Fig 11) The cut-in point of the
Timer Control Switch has been factory set at its maximum setting of
10 Ibs and should not be altered unless it is found that the timer
does not start until well after 10 Ibs of steam pressure has been
realized on the pressure gauge In this case, insert a screwdriver into
the center slot (H) of the larger dial (G) and rotate slightly counter-
clockwise to adjust timer to start at 10 PSI
RECALIBRATING TIMER CONTROL SWITCH
Should the Timer Control Switch vary through usage from its original
factory setting, it may be restored to proper working order by
recalibration
A visual check of the Timer Control Switch during a trial cycle will
quickly determine the need of recalibration With the Timer Control
Switch dial set at 10 Ibs (fully clockwise), the timer motor should cut-
in when 10 Ibs of steam pressure is registered on the steam
pressure gauge By watching the smaller dial (F) of the timer Control
Switch, the cut-in of the switch may be observed and heard to click
forward at the moment the circuit is made to the timer motor At that
precise moment the pressure gauge should measure 10 Ibs
RECALIBRATION PROCEDURE
1 Set the larger dial (G) of the Timer Control Switch to 10 Ibs (fully
clockwise)
2 Loosen the two screws (I) and (J) located on either side of the dial
slot (H)
3 First, note the position of the slot (H) in relation to the dial (G)
Then, while holding the dial stationary, insert a screwdriver into
the slot and rotate slightly to adjust (Clockwise rotation will set the
Timer Control Switch to cut the timer in at an increased amount of
steam pressure-counterclockwise will allow it to cut-in at a
decreased amount of steam pressure) Tighten the two screws (I)
and (J) to hold this adjustment
4 Check the unit through a trial cycle and note the pressure gauge
reading when the Timer Control Switch is observed and heard to
click forward Pressure reading should then be at 10 Ibs (Check
also may be made by continuity) Re-adjust necessary
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