Refrigeration Module Operation - Labconco FreeZone 70020 Series User Manual

Chapter 7: Troubleshooting
5. If a leak is observed around the bulkhead fittings, access the bottom of the
chamber and remove the insulation. Tighten the appropriate fitting by
placing a wrench on the fitting inside the chamber and use a second wrench
to turn the nut on the bottom of the chamber. Be careful not to damage the
evaporator coils or the brazed joints to the refrigeration system. Once the
fitting is tightened, perform the test again. If a leak is still present at the
bulkhead fittings, loosen the bulkhead fittings and apply vacuum grease to
the O-rings, then reassemble and test.

Refrigeration Module Operation

Under a no-load condition, the FreeZone Freeze Dry Systems can achieve a
collector temperature of -50°C, -84°C or -105°C (based on model designation) or
lower within 30 minutes when the vacuum pump is operating, depending on
ambient temperature and humidity. If the collector temperature does not reach the
design temperature within 30 minutes, then the refrigeration module is not
functioning properly.
If any repairs are required on the refrigeration module, contact your local
laboratory supply dealer. If your laboratory supply dealer is unable to provide
assistance, please call Labconco. Repairs should only be undertaken by a
competent refrigeration technician or through an authorized Labconco service
agency.
52 Product Service 816-333-8811 or 1-800-522-7658
Original instructions