Freeze-dryer Epsilon 1-4 LSCplus
Freeze-dryer Epsilon 2-4 LSCplus
5 Set-up and connection
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Version 04/2014, Rev. 2.13 of 01/12/2021
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Translation of the original operating manual
5.2.2
Aeration
DANGER
Risk of injury caused by bursting of the chamber
The double chamber is designed for vacuum. It is not a pressure vessel!
In the event of a malfunction, an impermissible excess pressure may build
up in the chamber, which may cause the chamber to burst.
This may lead to life-threatening injuries.
• Do not use the freeze-dryer when it is pressurised (excess pressure)!
• We strongly recommend installing a pressure relief device (e.g. a
safety valve or rupture disc) with a sufficient rating.
The freeze-dryer is equipped with one aeration valve (see chapter 2.1.1 -
"Functional and operating elements").
After the freeze-drying process, the aeration valve is used for aerating the
chambers to atmospheric pressure so that the loading door can be opened
in order to remove the product.
Usually, the ambient air is used for the aeration. However, the chamber can
also be aerated with an inertisation medium (e.g. nitrogen) via the hose
connector of the aeration valve.
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5.2.3
Special equipment - water cooling system: cooling water inlet and outlet
The refrigeration circuits require a sufficient supply with cooling water. The
cooling water inlet connection (see chapter 2.1.1 - "Functional and
operating elements") must be connected to the water supply network or to
the corresponding connector of a recooling system. The cooling water
outlet connection must be connected to the sewage system or to the
corresponding connector of the recooling system.
NOTE
The cooling water inlet and outlet must be properly connected to the water
supply or recooling system (in accordance with the labels on the freeze-
dryer). If they are not connected properly (reverse connection), there will
be no flow.
NOTE
When connecting the cooling water supply, it must be taken into
consideration that, due to the cooling water control valves, the water
cannot flow at all or at least not freely through the refrigeration system. It
is only when the freeze-dryer is in operation that the flow will be enabled.
The customer-provided cooling water feed flow line must be equipped with
a shut-off valve since, depending on the setting, the cooling water control
valves do not completely close when the freeze-dryer is switched off.
Optionally, the cooling water request signal, for controlling the customer-
provided shut-off valve, can be connected via a floating contact in the
switch cabinet.
