Freeze-dryer Alpha 3-4 LSCbasic
8 Maintenance and service
Version 11/2018, Rev. 1.9 of 01/12/2021
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Translation of the original operating manuel
CAUTION
Do not clean the film while dry.
• Use soft cloths, soft sponges made of synthetic fibres or rubber
squeegees and common household cleaning agents (glass cleaner) for
cleaning. The cleaning agents must be free from abrasive agents.
• Do not use hard sponges, cloths or brushes for cleaning.
• Avoid strong mechanical stress during cleaning.
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8.1.2
Ice condenser chamber
Before each start-up, ensure that the ice condenser chamber is free from
water residues.
• Open the media drain valve to drain off any liquid. Then, close the
valve.
• If necessary, wipe the ice condenser chamber dry with a cloth.
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8.1.3
Aeration valve, media drain valve
WARNING
Risk of poisoning/infection caused by contaminated condensate
(defrosting water)
The condensate may contain harmful substances originating from the
product.
Contact with the condensate may cause severe damage to health.
• Wear suitable protective clothes, gloves, and respiratory protection
when performing any work on the drain system (especially when
cleaning the valves and replacing the seals)!
Contaminants such as product residues may lead to an insufficient vacuum.
In this case, the aeration valve and the media drain valve must be cleaned.
• Switch the freeze-dryer off and disconnect the mains plug.
• Remove the valve core.
• Clean the valve core and the opening with a moist cloth.
• Clean the O-rings and inspect them for any damage. Damaged O-rings
must be replaced.