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387366-389 Operator Manual Sterilizer Operation
The Liquid Air Cool cycle is designed to reduce the amount of time
required to cool liquid loads to safe temperatures at the end of a cycle.
The process utilizes air-over-pressure to allow for steam pressure to
be reduced faster, without the risk of boil-over. To further assist with
cooling, water is used in the jacket (in place of steam) to cool the
chamber walls and increase cooling in the chamber.
Run a Liquid Air Cool Cycle by pressing LIQUID button from one of
the Operating Mode Screens (refer to S
ECTION 5.2, OPERATING MODES).
The following screen appears:
Press LEFT ARROW button to cancel cycle selected and return to the
operating mode screen.
Press AIRCOOL button to start the Liquid Air Cool Cycle. Cycle phases
are as follows:
NOTE: If CLOSE DOOR(S) button is shown, close door(s). Refer to
S
ECTION 5.3, STATUS BUTTONS, for description of buttons.
JACKET CHARGE PHASE: Jacket charge phase continues until
jacket temperature is greater than set sterilizer temperature (example:
121°C [250°F]). If separate steam selected, jacket charge phase
continues until jacket temperature is greater than set jacket
temperature (example: 115°C [239°F]).
ACTIVATE SEAL PHASE: Door gasket seals with steam until door
seal switch is closed. An additional 20 seconds elapses, after seal
switch is closed, before phase is complete.
PURGE PHASE: Steam enters chamber from jacket to control
pressure at 6 psig (0.41 bar). Fast exhaust aids in removing air from
chamber.
CHARGE PHASE: Chamber charges with steam until chamber
temperature reaches sterilize temperature setpoint. If load option is
selected, phase holds until load temperature is greater than or equal
to sterilize temperature. Waste temperature is controlled to maintain
approximately 60°C (140°F).
STERILIZE PHASE: Chamber temperature controls at sterilize
temperature, plus overdrive (control temperature). Waste temperature
is controlled to maintain approximately 60°C (140°F).
AIR COOL PHASE: Chamber controls with compressed air at 18 psig
(1.24 bar) until load temperature is less than 80°C (176°F).
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