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4.2. Mains Electricity
4.3. Fuses on Site
4.4. Checking the Earth Connection
4.5. Aeration
4.6. Condensate and Defrosting Water
26 • Installation and Commissioning of the Unit
The following connections are required at the site:
The voltage given on the name plate must correspond to the local
supply voltage.
CHRIST freeze dryers are units of safety class I and include a three-
conductor connection cable and a shockproof plug.
The freeze dryer must be protected typically with a 16 AG fuse.
For checking the earth connection there is a screw for equalising the
ground potential on the back panel of the freeze dryer. The check can
be carried out by means of an appropriate measuring device.
The aeration and drain valve at the lower left side of the unit is used to
vent the ice condenser chamber.
In case penicillin bottles have to be sealed under nitrogen instead of
vacuum, the ice condenser chamber can be flooded with nitrogen via
the nozzle of the aeration valve.
CAUTION! Max. 0.2 bar overpressure!
The condensate and defrosting water is drained via the aeration and
drain valve on the lower left side of the unit. To drain the water,
connect the hose supplied with the unit to the nozzle. The condensate
and defrosting water are collected in a vessel.
The condensate and defrosting water can also be drained directly via
this hose. The condensate and defrosting water must be able to drain
freely. To achieve this, the hose must have a steady downward slope.
It must be ensured that water does not collect in any part of the hose.
The end of the hose always has to be above the level of the liquid in
the vessel for the discharged liquids. Otherwise there is the risk of
water and dirt residues being sucked into the ice condenser chamber
if there is a negative pressure when opening the drain valve.
The drain valve is also used to vent the unit when a freeze drying
process has been completed.
Operating Manual Freeze Dryer ALPHA 1-2 LDplus
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