Owner`s manual
19
SECTION 5 FIELD SERVICE INSTRUCTIONS & ASSEMBLY
THE STEAM PRESSURE GAUGE:
The Steam Pressure Gauge registers the pressure of
steam, which is within the sterilmatic sterilizing cham-
ber. To replace this unit, it is necessary to disconnect
the copper tubing and to remove the two nuts holding
the gauge framework in place.
THE SAFETY VALVE:
The Safety Valve is factory set to automatically open
and exhaust excess steam from within the sterilizing
cylinder, thereby assuring that operating pressures re-
main within safe limits. The lever action of the safety
valve must be free to operate unrestricted at all times.
If the Safety Valve should leak continually with a pres-
sure build-up or should it cause an interruption on a
sterilizing cycle prematurely (below 124° Centigrade
on the temperature gauge), it must be replaced. How-
ever, the temperature gauge should rst be checked
for accuracy.
THE FLUE:
The Flue serves as a protective shield for the steam
trap safety valve, exhaust valve, and electrical compo-
nents as well as a mounting base for the control panel.
The pressure gauge, dial thermometer, exhaust valve
switch and timer, protrude through the control panel.
The Flue cover may be removed to allow more room
for servicing the control components. The control panel
face may then be removed by unscrewing the sheet
metal screws, which mount it to the Flue.
THE EXHAUST
SOLENOID VALVE:
The exhaust solenoid is
normally closed and only
opens at the end of the cy-
cle when it is energized.
TO REPLACE A THERMOSTATIC ELEMENT:
Remove the cap of the steam trap (turn it counter-
clockwise).
Unscrew the diaphragm and seat and discard.
Wipe all dirt and scale from the inside of the steam
trap.
Place a new diaphragm and seat securely into the
steam trap and replace the cap (New Style - Part
No. 98-1719).
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THE STEAM TRAP:
The Steam Trap has the very important automatic,
dual function of exhausting all air from the sterilizing
compartment, and of making a suitable seal to allow a
pressure build-up of live steam during a cycle of ster-
ilization. Also, a slot is milled at an angle through the
seat to allow a constant bleed-off of a slight amount
of steam during the cycle to completely eliminate any
air pockets in the cylinder. Failure of the trap to oper-
ate properly will result in an uneven distribution of live
steam within the compartment.
HOW IT WORKS:
With the introduction of steam into the sterilizing com-
partment, cold air will escape. When sufcient gener-
ated steam displaces the cold air, it will then start to ex-
haust through the steam trap to heat the thermostatic
element. The expansion of the thermostatic element
will make a seal against the seat to enclose the live
steam within the sterilizing compartment and a steam
pressure build-up will occur.