9 Decommissioning
9.1 Shutting down for longer periods
Before shutting down the vacuum pump, observe the following instructions to adequately protect the in-
terior of the vacuum pump (pumping system) against corrosion:
1. Switch off the vacuum pump.
2. Vent the vacuum pump.
3. Allow the vacuum pump to cool down.
4. Remove the vacuum pump from the vacuum system if necessary.
5. Change the operating fluid.
6. Start the vacuum pump and bring it to operating temperature in order to wet the inside of the vac-
uum pump with fresh operating fluid.
7. Seal the connections with the original protective covers.
8. Store the vacuum pump in dry, dust-free rooms, within the specified ambient conditions.
9. Pack the vacuum pump together with a drying agent in a plastic bag, and seal the vacuum pump
airtight if it is to be stored in rooms with damp or aggressive atmospheres.
10. For longer storage periods (> 2 years), Pfeiffer Vacuum recommends changing the operating fluid
again prior to recommissioning.
9.2 Recommissioning
NOTICE
Risk of damage to vacuum pump as a result of operating fluid aging
The operating fluid usability is limited (max. 2 years). Prior to recommissioning, following a shutdown
of
2 years or more
, carry out the following work.
► Change the operating fluid.
► Change the radial shaft seal rings and other elastomer parts if required.
► Observe the maintenance instructions – consult Pfeiffer Vacuum if necessary.
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