6-9
Sterilizer Operation Operator Manual P129394-176
6.9 Prevac Cycles Prevac cycles, 270°F (132°C), are used for sterilizing double-
wrapped instrument trays or fabric packs. Prevac cycles, 275°F
(135°C), are used for sterilizing double-wrapped instrument trays
only. Immediate use cycles must not be used with wrapped loads or
fabrics.
1. Before running this cycle refer to S
ECTION 6.1, BEFORE
O
PERATING THE STERILIZER, ON PAGE 6-1.
2. See instructions for using the loading car/transfer carriage or
rack and shelves, earlier in this section, for procedures to load
the sterilizer.
• For 270°F (132°C) Cycle, press 270 PREVAC button to start
the prevacuum cycle. Refer to Table 6-1 for descriptions of
cycle use and loading recommendations.
• For 275°F (135°C) Cycle press 275 PREVAC touch-screen
pad to start the 275°F (135°C) Prevacuum cycle. Refer to
Table 6-1 for descriptions of cycle use and loading
recommendations.
NOTE: If the wrong cycle has been selected, see S
ECTION 6.15,
A
BORTING CYCLES, ON PAGE 6-30.
3. Sterilizer automatically progresses through cycle, as follows:
NOTE: The control display indicates cycle progress in two ways:
a. Large numerals in the screen’s center display estimated
remaining cycle time,
b. Change of phase name in the top status line of the screen.
ACTIVATE SEAL – Steam enters the door seal, pressing it
against inside surface of the door.
PURGE – Chamber is purged with steam. Start of Condition is
printed.
VACUUM/PRESSURE PULSES – Differing by temperature rating
for the cycle:
• 270°F (132°C) #1 - #4 – Four vacuum pulses.
• 275°F (135°C) #1 – #3 – Three vacuum pulses.
CHARGE – Chamber is charged with steam. Start of steam
charge is printed.
STERILIZE – Start of sterilize exposure is printed when the
chamber reaches sterilization temperature. Chamber
temperature is printed every minute.
FAST EXHAUST – Start of exhaust is printed and chamber is
exhausted to 4 psig (0.28 bar).
DRY – Start of dry is printed and display counts down dry time
remaining.
AIR BREAK – Chamber is returned to atmospheric pressure.
RETRACT SEAL – A vacuum is drawn on the seal, retracting it
from inner surface of door.
COMPLETE – Complete tone sounds. Cycle summary and end of
cycle messages are printed.
4. Unload sterilizer (see instructions for using the loading car/
transfer carriage or rack and shelves, S
ECTION 6.4, UNLOADING
THE
STERILIZER, ON PAGE 6-4 for procedures to remove load).
WARNING – BURN HAZARD:
• Sterilizer, rack/shelves and
loading equipment will be hot
after cycle is run. Always
wear protective gloves and
apron when removing a
processed load. Protective
gloves and apron must be
worn when reloading
sterilizer following the
previous operation.
• Steam may be released from
the chamber when door is
opened. Step back from the
sterilizer each time the door
is opened to minimize
contact with steam vapor.
WARNING – SLIPPING
HAZARD: To reduce slippery
conditions, keep floors dry by
immediately wiping up any
spilled liquids or
condensation in sterilizer
loading or unloading area.
WARNING – PERSONAL
INJURY and/or EQUIPMENT
DAMAGE HAZARD: When
closing the chamber door,
keep hands and arms out of
the door opening and make
sure opening is clear of
obstructions.
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