Freeze-dryer Alpha 3-4 LSCbasic
5 Set-up and connection
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Version 11/2018, Rev. 1.9 of 01/12/2021
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Translation of the original operating manuel
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5.7
Edwards nXDS 10iC vacuum pump (dry-running)
WARNING
Danger of poisoning/infection due to exhaust air
The exhaust air may contain harmful substances originating from the
product.
Contact with particles in the exhaust air (especially by inhalation) may
result in severe damage to health.
• Use a silencer with integrated filter elements or – depending on the
product
– guide the exhaust gases from the outlet of the vacuum pump
to a suitable treatment system in order to prevent the discharge of
harmful substances into the surrounding atmosphere! Compliance with
the national rules and regulations for the protection of the environment
must be ensured!
• When working on the vacuum system (and especially on the vacuum
pump), it may be necessary to wear suitable protective clothing,
gloves and a breathing mask depending on the product!
NOTE
Refer to the separate instruction manual of the vacuum pump and
silencer!
CAUTION
The current required by the Edwards nXDS 10iC vacuum pump is greater
than the maximum permissible current for the freeze-dryer (see the
following picture). This is why the pump must be supplied separately by
way of a customer-provided socket.
1
Label indicating the
maximum current
Fig. 13: Indication of the maximum current for the vacuum pump (example)
The vacuum exhaust gases of the dry-running vacuum pump are
completely free from oil particles. However, small quantities of debris from
worn seals may be emitted. That is why, even when working with non-
harmful substances, the exhaust gases must either be led to the outside
through the roof via a pipe that is properly connected to the outlet of the
