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Product Service: Domestic 1-800-522-7658, International 816-333-8811
Chapter 4: Using Your Freeze Drye
4. Service Vacuum Pump – The vacuum pump
normally plugs into the vacuum pump
receptacle on the back of the Freeze Dryer.
When the Freeze Dryer has accumulated a total
of 1000 operating hours, the alarm indicator
will flash. Press MENU to display the alarm
“CHANGE VACUUM PUMP OIL.” Pressing
MENU multiple times will identify other
alarms if they have occurred. This alarm can
be cancelled by pressing MENU until the
display says “NO ALARMS” and then pressing
the VACUUM button and holding until the
message disappears. This will reset the 1000
hour timer. It may be necessary to service
the vacuum pump more frequently than
every 1000 hours depending on the
operation of the freeze dryer. The pump oil
should be regularly monitored to verify that it
is clean.
Shut Down
When a sufficient amount of condensate
accumulates on the collector coil, the collected
frozen solvent will obstruct the flow of vapor to
the collector chamber. At this point the unit should
be defrosted. First, release system vacuum by
turning the plastic knob on a valve to the
“vent”/open position or by pulling the collector
chamber drain hose plug. Now turn the vacuum
and refrigeration switches on the control panel to
“off.” When operating in the automatic start-up
mode, the vacuum automatically shuts off when
the refrigeration switch is turned to “off.”
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