2
3
1
Fig. 33:
Draining cooling liquid
1 Venting screw
3
Drain valve
2 Collection receptacle
Procedure
1. Unscrew the venting screw.
2. Place a collection receptacle below the drain valve.
3. Open the drain valve.
4. Fully drain the cooling liquid.
5. Close the drain valve.
6. Screw in the venting screw.
7. Switch on the vacuum pump for a maximum of 5 seconds.
8. Repeat the drainage procedure in order to drain the remaining cooling liquid.
7.6.2 Filling cooling liquid
NOTICE
Property damage as a result of inadequate cooling
Inadequate cooling may cause damage to the vacuum pump.
► Only use the cooling liquid prescribed by Pfeiffer Vacuum (Zitrec M 25).
► Evacuate the cooling chambers following repairs and fill cooling liquid.
Required consumables
● Coolant, Zitrec M 25
Required tools
● Allen key,
WAF 10
● Wrench,
WAF 19
Required aids
● Funnel (optional)
Maintenance
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