FDI P2131, Technical Manual, Page: 58 / 161

ROUTINE SHUTDOWN CHECKLIST
CHECK OPERATION
1. Add water to the jacket to the HIGH mark. This will help (1) cool
down the jacket and (2) ensure that the jacket is full of water and
ready to run again when needed. Also, “top off” the WRS water
level to the HIGH mark using the SWS if needed.
2. Leave the chamber door latched but not tightened to prevent a
vacuum from being created in the chamber during cooldown. To
break a vacuum in the chamber and open the door, press the
“VENT” button on the control panel touch screen.
3. Turn OFF SMU control power switch. DO NOT open the jacket
vent valve.
NOTE: As the SMU cools down, the steam in the jacket will
condense, resulting in a deep vacuum. This condition is not a
problem and will not cause any damage to the SMU. In fact, this
is a recommended practice since relieving the vacuum by
opening the jacket vent valve will allow air to enter the jacket.
Keeping air out of the jacket will enable the next cycle to operate
more efficiently. Air is the enemy of effective sterilization.
WARNING: If freezing temperatures are possible around the sterilizer, all water from
the SMU, WRS, and SWS must be drained to prevent possible freezing
and damage to the pressure vessel, pump, SWS housing, or other
components. Reference Section 3.7 for information on draining water.
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