18 • General Information on Freeze Drying Operating Manual Freeze Dryer ALPHA 1-2 LDplus
2.7. Defrosting
Defrosting of the ice condenser is carried out at room temperature
or with warm water. At a maximum the ice condenser chamber
may be half filled with water.
When defrosting the ice condenser with (warm) water, it is of
crucial importance that no water gets into the pipe connection for
the vacuum pump and the vacuum sensor (see figure)!
The condensate as well as the defrosting water are drained
through the drain valve at the left side of the unit. To do this, a
hose is put onto the nozzle. The condensate and the defrosting
water are collected in a vessel.
Pipe connection for
vacuum pump
(behind baffle plate)
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