Pfeiffer Vacuum DUO 35, Руководство по эксплуатации

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6. If it is a reddish-brown color at the latest (corresponding with color identification number 5),
change the operating fluid.
7.4.2 Draining the operating fluid
WARNING
Health hazard and risk of environmental damage from toxic contaminated operating fluid.
Toxic process media can cause operating fluid contamination. When changing the operating fluid,
there is a health hazard due to contact with poisonous substances. Illegal disposal of toxic substan-
ces causes environmental damage.
► Wear suitable personal protective equipment when handling these media.
► Dispose of the operating fluid according to locally applicable regulations.
CAUTION
Scalding from hot operating fluid
Danger of burns when draining operating fluid if it comes into contact with the skin.
► Wear protective equipment.
► Use a suitable collection receptacle.
1
2
4
3
Fig. 23: Draining the operating fluid
1 Filler screw 3 O-ring
2 O-ring 4 Drain screw
Required tool
● Allen key, 8 mm
● Screwdriver
Draining the operating fluid
1. Shut down the vacuum pump and allow it to cool if necessary.
2. Vent the pump to atmospheric pressure via the intake side.
3. Unscrew the operating fluid filler screw.
4. Be careful with the O-ring.
5. Place a collection receptacle below the drain screw.
6. Unscrew the operating fluid drain screw and drain the operating fluid (while still warm if possible).
7. Screw the filler and drain screws back in.
8. Be careful with the O-rings.
9. Switch on the pump with the vacuum flange open for max. 5 seconds.
10. Tilt the pump slightly to completely empty it and drain the remaining operating fluid.
11. In the event of heavy contamination, change the operating fluid several times (flushing).
Maintenance
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