Defrosting - Fisher ALPHA 1-2 LDplus Operating Manual

2.7. Defrosting

18 • General Information on Freeze Drying
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)
Operating Manual Freeze Dryer ALPHA 1-2 LDplus