MAINTENANCE WITH Q&A
Page 5-11
Why does my chamber heat or cool slower than the published
speci• cations?
Performance is signi• cantly effected by the characteristics of your test sample. Factors include size, weight,
material, shape, and power dissipation if energized. The test sample should be placed in the chamber in a
manner that allows for air circulation. You should not place the test sample directly on the chamber • oor. It
should be placed on the shelf. Multiple test samples should be distributed throughout the chamber to ensure
even air• ow and minimize temperature gradients. If necessary, additional shelves should be used to evenly
distribute the load.
Why is there water/ice/snow in the chamber?
Any time the ambient air is subjected to temperatures below the dewpoint, moisture will condense out of the
air. The effect is ice or frost during low temperature operation. When the chamber is heated above 0°C, the
ice or frost will turn into water. To avoid moisture condensation, make sure the port plugs are inserted at all
times. Also, avoid opening the chamber door while the chamber is operating at temperatures below room
ambient. When a low temperature test is completed, warm the chamber to at least room ambient before
opening the chamber door and before removing your test sample.
I haven’t used the chamber for a while. Is there anything I should do to prepare it for
operation?
Perform ALL the steps in the Preventive Maintenance Schedule before placing the chamber back into service.
This will ensure that nothing has been damaged and that a leak has not developed.
Can the person who services our air conditioning also service the
chamber?
Probably not. Most air conditioning mechanics are not familiar with low-temperature cascade refrigeration
systems. While this chamber is relatively easy to maintain and repair, most air conditioning mechanics do
not have the necessary refrigerants and may not be familiar with the microprocessor-based controls. This
chamber should only be serviced by a quali• ed mechanic that is familiar with low-temperature cascade
refrigeration systems. Call Cincinnati Sub-Zero to recommend one in your area, or to check if the one you
would like to use is quali• ed.
Can/Should I put a • lter in front of the condenser air inlet?
No, Cincinnati Sub-Zero does not recommend this. Please follow the maintenance procedures and clean the
condenser • ns periodically.
I need to send the chamber to Europe/Asia. Will it work with their power?
Europe and Asia generally have 50 Hz power. Standard voltages in Europe are typically 220V to 240V, while
parts of Asia may be 200V. MCB(H) operation at 220V to 240V/ 50 Hz requires bucking transformers to lower
the voltage for the unit to 100V. These transformers are available from Cincinnati Sub-Zero for a reasonable
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