Manual

Operating Manual Freeze Dryer ALPHA 1-4 LDplus / ALPHA 2-4 LDplus Maintenance and Service  59
a mark or any other change, as well as corrosion is detected, the
part in question (shelf, vessel, drying chamber etc.) must be
replaced immediately for safety reasons.
Fans, lid seal, vessels, racks, drying chamber and shelves must be
cleaned regularly in order to avoid damage.
Cleaning of accessories should be carried out away from the
freeze-dryer once a week or preferably after every use.
If there is the risk of toxic, radioactive or pathogenic
contamination, special safety measures must be
considered and adhered to.
Aluminium accessories are particularly subject to corrosion. A
neutral agent with a pH-value between 6 and 8 should be used for
such parts. Alkaline agents (pH > 8) must be avoided. Thus life time
is increased and corrosion is reduced considerably.
Careful maintenance through the user increases life time and
avoids premature failure of accessories. Damage caused by
insufficient care does not constitute a warranty claim.
7.1.7.3. Maintenance of the Drying Chamber
The drying chamber is equipped with the LYO CHAMBER GUARD
splinter protection film. In order to prevent the film from being
damaged, only use water and commercially available window
cleaning agents as well as synthetic sponges, soft tissues or a
rubber wiper for cleaning.
Do no use any scouring agents, hard sponges, rough tissues, or
brushes!
Do not dry-clean any drying chambers that are equipped with LYO
CHAMBER GUARD film!
7.1.7.4. Maintenance of the Aeration Valve and the Drain Valve
Special attention must be paid to the aeration valve and the drain
valve. If residues from previous drying processes deposit on them,
there is the risk of faulty operation of the freeze-dryer. Therefore,
take care that no product or other residues will get into the pipe to
the aeration valve and the drain valve.