Technical data

The following connections are required at the site:
4.2. Mains power
The operating voltage on the name plate must correspond to the
local supply voltage.
CHRIST freeze dryers are units of safety class I. The units ALPHA
1-4 LSC / ALPHA 2-4 LSC are equipped with a three-wire
connection cable with a 230VAC safety plug with ground contact.
4.3. Fuses on site
The freeze dryer must be protected with a 16 AG fuse.
4.4. Checking the ground connection
To check the ground conductor, there is an equipotential bonding
screw at the rear panel of the freeze dryer. A ground conductor
check can be carried out using a suitable measuring instrument.
4.5. Aeration
The aeration valve at the upper left side of the unit is used to
aerate the ice condenser chamber.
If penicillin bottles have to be sealed under nitrogen and not in a
vacuum, the ice condenser chamber can be flooded with nitrogen
via the hose nozzle of the aeration valve.
CAUTION! Max. 0.2bar overpressure!
4.6. Condensate and defrosting water
The condensate and the defrosting water are discharged through
the drain valve at the lower left side of the unit. Connect the
supplied hose to the hose nozzle. The condensate and the
defrosting water are collected in a vessel.
The condensate and the defrosting water can also be directly fed
into a drain using this hose provided it can flow off 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 collecting vessel. Otherwise there is the risk of water
and dirt residues being sucked into the condenser chamber if there
is a negative pressure when the drain valve is opened.
26 • Installation and Commissioning of the Unit Operating Manual Freeze Dryer ALPHA 1-4 LSC / ALPHA 2-4 LSC