20
Maintenance
Fig. 13: Draining the operating fluid
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Screw in operating fluid drain screw 142; pay attention to o-ring.
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Allow pump to run for a maximum of 5 seconds with the vacuum flange open.
Î
Drain off remaining operating fluid.
– In case of serious contamination, the operating fluid will have to be changed
several times (flushing):
Flushing
Î
Fill up with operating fluid to the middle of the sight glass.
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Operate the pump with the gas ballast open until the pump has warmed up.
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Drain the operating fluid again and check for contamination, flush again if neces-
sary.
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Screw the operating fluid drain screw back in.
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Fill up with operating fluid and check the filling level
.
142
WARNING
Hot operating fluid!
Danger of burns when draining due to contact with skin.
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Wear suitable protective clothing.
WARNING
Operating fluid may contain toxic substances from the pumped media!
Danger of poisoning from the emission of harmful substances (radioactive, toxic, etc.)
from the operating fluid.
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Wear suitable protective clothing and respirators.
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Dispose of operating fluid according to the local regulations
NOTE
Request safety data sheets for operating fluids and lubricants
from Pfeiffer Vacuum or download them from the Internet.
Î
Dispose of operating fluid according to the local regulations.
