29
Product Service: Domestic 1-800-522-7658, International 816-333-8811
Chapter 4: Using Your Freeze Dryer
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
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
“vacuum”/open position or by pulling the collector
chamber drain plug out of the drain hose. 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.”
