Pfeiffer Vacuum OKTA 1000, Руководство по эксплуатации

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6.6 Restarting
NOTICE
Damage to the roots pump from significant temperature fluctuation
If the housing cools down too quickly due to external influences, there is a risk of contact being made
between the rotor at warm operating temperature, and the colder pump housing. This will result in
irreversible pump damage.
► Avoid uneven cooling, if you are going to switch the roots pump back on after a short period.
► Vent the roots pump in order to achieve a temperature compensation between the housing and
rotor as quickly as possible.
Operation
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