22
Maintenance
Fig. 12: Draining the operating fluid
Screw in operating fluid drain screw 328; pay attention to O-ring.
Screw in operating fluid filler screw 327.
Allow pump to run for a maximum of 5 seconds with the vacuum flange open.
Drain off remaining operating fluid.
– In case of serious contamination, the operating fluid will have to be changed sev-
eral times (flushing):
Fill up with operating fluid and check the filling level
(see p. 14, chap. 5.5)
.
Flushing and clean-
ing
Fill up with operating fluid to the middle of the sight glass.
Operate the pump with the gas ballast open until the pump has warmed up.
Drain the operating fluid again and check for contamination, flush again if necessary.
Screw the operating fluid drain screw back in.
Fill up with operating fluid and check the filling level
(see p. 14, chap. 5.5)
.
328
327
WARNING
Hot operating fluid!
Danger of burns when draining due to contact with skin.
Wear suitable protective clothing.
Use a suitable collecting vessel.
WARNING
Operating fluid may contain toxic substances from the pumped media!
Danger of poisoning from the emission of harmful substances from the operating fluid.
Wear suitable protective clothing and respirators.
Dispose of operating fluid according to the local regulations
Request safety data sheets for operating fluids and lubricants
from Pfeiffer Vacuum or download at www.pfeiffer-vacuum.com.
Dispose of operating fluid according to the local regulations.
