VWR 5700 Series, Operating And Maintenance Manual

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4-6 ULT Freezer VWR International
Section 4
Maintenance
* Qualified service technicians only
** Dispose of properly, according to all state and federal regulations.
PREVENTIVE MAINTENANCE
Freezers
Your equipment has been thoroughly tested and calibrated before shipment. Regular preventive maintenance is important to keep your
unit functioning properly. The operator should perform routine cleaning and maintenance on a regular basis. For maximum
performance and efficiency, it is recommended that the unit be checked and calibrated periodically by a qualified service technician.
The following is a condensed list of preventive maintenance requirements. See the specified section of the instruction manual for
further details.
We have qualified service technicians, using NIST traceable instruments, available in many areas. For more information on Preventive
Maintenance or Extended Warranties, please contact the VWR Service Department.
Cleaning and calibration adjustment intervals are dependent upon use, environmental conditions and accuracy required.
Tips:
• Fill an upright by starting at the bottom near the probe and add racks to one shelf at a time. Allow freezer to recover to set point
between shelves.
• Fill a chest by starting at the left side near the probe. Filling with room temperature racks will result in a long pull-down time.
• Fill unit with frozen product to help overall performance; frozen water jugs, for example.
• Always make certain the vacuum relief port is free of frost and ice, to allow for timely re-entry into the freezer after a door opening.
Action
Monthly Yearly Every 2 Years
Verify ambient temperature, <90°F
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Check and clean probe cover, gaskets, hinges and lid(s) of ice and snow. See
Figure 1-4 for probe location. See “Clean Lid Gasket”.
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More frequent cleaning may be
required, depending on use and
environmental conditions.
Check air filter. Clean or replace as needed. See “Clean Air Filter”.
4 4X
Check alarm back-up battery. See “Connect Unit to Electrical Power” in
Section 1 and “Replace Battery” in Section 4.
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**Replace
Check condenser fan motor for unusual motor noise or vibration.
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* Verify and document calibration, at the minimum, annually. See Section 2
Calibration.
* Clean condenser compartment and wipe off condenser. See “Clean
Condenser” in Section 4.
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