Owner`s manual

18
SECTION 5 FIELD SERVICE INSTRUCTIONS & ASSEMBLY
Observing the current further will show another sharp
drop to approximately 1 Amp; at this instant, there
should be corresponding chamber pressure of 0.43 kg/
cm
2
and a temperature reading of 110°C Centigrade,
on the temperature gauge.
ADJUSTING THE RANGE OF OPERATION,
STM-ELX:
The range of operation of Model STM-ELX is adjusted
by simply turning the adjusting knob on the outside of
the Control Panel. A counter-clockwise turn decreases
the pressure while a clockwise turn increases the pres-
sure. Observe pressure and temperature gauges and
adjust knob as required.
NOTE: When resetting this control for elevations above
sea level, a correction of 0.13 kg/cm
2
per kilometer el-
evation is necessary.
DOMESTIC
CHECKING THE 230° SETTING, STM-EL:
The Unit should be completely evacuated then temper-
ature selector dial should be turned on 230° Fahren-
heit. Observe the current until it takes a sharp drop to
approximately one-third of the full load; at this instant,
there should be a corresponding chamber pressure of
2 PSI
Observing the current further will show another sharp
drop to approximately 2 Amps; at this instant, there
should be a corresponding chamber pressure of 6.1
PSI and a temperature reading of 228° to 232° Fahren-
heit, on the temperature gauge.
ADJUSTING THE RANGE OF OPERATION,
STM-EL:
The range of operation of Model STM-EL is adjusted
by simply turning the adjusting knob on the outside of
the Control Panel. A counter-clockwise turn decreases
the pressure while a clockwise turn increases the pres-
sure. Observe pressure and temperature gauges and
adjust knob as required.
NOTE: When resetting this control for elevations above
sea level, a correction of 6/10 Ibs. per thousand feet is
necessary.
CAST-IN HEATING ELEMENTS:
Located under the sterilizing cylinder is a bank of (3) U-
shaped heating elements. These elements are welded
in place in a protective aluminum shield. The elements
cannot be removed, and in the unlikely event that one
or all fail, the complete cylinder must be replaced.
THE LOW WATER CUT-OFF
( MANUAL RESET ):
Fastened to a special mounting brace behind the front
panel, the Low Water Cut-Off acts to shut off the com-
plete unit, should the water run dry. The Low Water Cut
Off is factory set, to shut the unit off when the cylinder
temperature rises between 380
o
and 440° Fahrenheit.
When the Sterilmatic is turned on without water or the
water has been evaporated away, the temperature of
the aluminum sterilizing cylinder will rise and by heat
induction effect the Low Water Cut-Off. Its inner electri-
cal contacts will be forced open from heat expansion,
thus cutting off the ow of electric current to the heating
elements. With the replacement of water into the cylin-
der the cylinder temperature will drop and the contacts
of the Low Water Cut-Off can be again closed. The unit
will only restart after the manual button has been re-
set.
THE ELECTRIC CONTACTORS:
The Electric Contactors are located on the top of the
unit, underneath the top ue cover. These important
components receive an electrical impulse when the
Timer is turned on. When the unit reaches a pre-set
pressure of 13-13.5 PSI the #1 switch will cut out caus-
ing the front contactor to become de-energized. This,
in turn, will disconnect the left and right bank of heaters
and the timer motor will start.
THE TIMER:
The Sterilmatic is put into operation with the manual
setting of the timer. With the setting of the timer, an
electrical current is directed to the pressure control.
The current energizes the pressure control, which acti-
vates the contactor coils to cause a current ow to the
heating elements. When the cylinder pressure reaches
13 to 13.5 PSI, the timer motor and pilot light are ener-
gized. At the end of the cycle the timer will cut off the
ow of electricity to all the components except the ex-
haust, the exhaust solenoid and the timer motor. They
will revert back to their original deactivated state. The
timer motor and pilot light will continue to be energized
after the timed sterilizer cycle has been completed and
for two additional minutes. Only after this will the timer
and white pilot light be de-energized. If the timer fails
to operate the Sterilmatic, replace it. The timer is re-
placeable only as a complete unit as factory repairs to
it would not be practical in the economical interests of
the customer.