Labconco FreeZone 6 Liter Benchtop Freeze Dry Systems 77520 Series User Manual
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Product Service: Domestic 1-800-522-7658, International 816-333-8811
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Refer to the following if your Freeze Dryer fails to operate
properly. If the suggested corrective actions do not solve your
problem, contact Labconco for additional assistance.
Labconco Freeze Dry Systems that are clean, dry and without
samples attached should reach a vacuum of 0.133 mBar within 10
minutes and should achieve an ultimate vacuum of 0.033 mBar
within 18 hours when the refrigeration is operating. If the Freeze
Dryer does not obtain a satisfactory vacuum, perform the following
maintenance tests.
I. Vacuum Pump
First make sure that the vacuum pump operates. If it fails to
operate, check the electrical connections of the Freeze Dryer to the
power source and then check the electrical connection of the
vacuum pump to the Freeze Dryer. If the vacuum pump has a
power switch, make sure that it is turned on. If the vacuum is not
adequate when the vacuum pump is operating, proceed with the
following steps:
1. Check the oil and ensure it is clear and clean. If the oil
looks cloudy or has any particulates, replace the pump oil.
Sometimes it may be necessary to flush the pump with
clean oil several times. To flush the pump, run the pump 5
to 10 minutes to allow the oil to warm up. Drain the oil
and refill with clean oil. Repeat as necessary.
2. Check the oil level in the pump. Ensure it is filled to the
correct level.
3. Check vacuum hose connections from the pump to the
Freeze Dryer and try running the unit.