Market Forge Industries STM-E, Руководство пользователя, Страница: 23 / 36

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SECTION 5 ASSEMBLY
ROLLER ASSEMBLY ( Items 8 & 9 )
The Roller Assembly must be kept free-rolling at all times. Should this assembly be allowed
to become frozen due to lack of lubrication, undue strain will be put on the door handle and
the fulcrum casting while the door is being locked. Use only a dry lubricant such as graphite;
as oil or grease will tend to attract dirt to this area.
DOMESTIC
THE PRESSURE ACTUATED TEMPERATURE CONTROL, STM-E AND STM-EL
The pressure actuated temperature control, located behind the control panel assembly,
governs the manufacture of steam by controlling the input of electric current to the heating
elements.
HOW IT WORKS
When the Timer is set, rear and front contactors will become energized allowing input of
current to the temperature control, thus closing the contacts completing the current to the
heating elements. Steam will then be generated within the sterilizing chamber.
The steam pressure within the sterilizing chamber is transmitted by means of a tube to the
bellows of the temperature control; as the steam pressure increases, its compression action
on the bellows causes the Switch #1 on the control is set to cut out on rising pressure at 13.5
PSI and to cut in on falling pressure at 13 PSI. (controlling the two outer banks of heating
elements}. Switch #2 is set to cut out on rising pressure at 15.5 PSI. and cut in on falling
pressure at approximately 15 PSI (controlling center heater element only}.
Thus, a balancing effect of steam pressure build-up and heater element current is constantly
maintained during the sterilizing cycle. When the Timer signifies the end of the cycle, the
electric current to the contactors will automatically be broken; the temperature control
contacts will be broken; and steam generation will stop.
ADJUSTING THE RANGE OF OPERATION, STM-E
The operational range of the temperature control is factory set as follows: Outer bank of
elements OFF at 13.0- 13.5 PSI; Center bank of elements OFF at 15.5- 15.0 PSI; minor
compensating adjustments can be made by turning the adjusting screws counter-clockwise
to increase pressure and clockwise to decrease pressure. Both screws should be turned the
same amount when making an adjustment.
NOTE: When resetting this control for elevations above sea
Level a correction of 6/10 Ib. per thousand feet is necessary.
1. Before making adjustments, shut all electrical
current to the sterilizer OFF to eliminate shock
hazard.
2. Remove the Flue Cover.
3. Make sure that all exposed wires are not in a
hazardous position, and then turn on electrical
power.
4. Run unit through cycle, observing pressure and temperature gauges, turn adjusting
screws as required