Procedure
1. Unscrew the filler screw.
2. Fill up with lubricant according to the marks on the sight glass.
3. Screw in the filler screw.
4. Check the fill level during operation when running with final pressure.
7.6 Changing the 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.
Cooling liquid is only required if a heat exchanger is installed
Change the cooling liquid for screw pumps with a heat exchanger.
Prerequisites
● Vacuum pump switched off and cooled
● Vacuum pump vented
Required consumables
● Cooling liquid
Required tools
● Allen key,
WAF 10
Allen key,
WAF 19
Required aids
● Collection receptacle
● Cleaning cloth
● Funnel (optional)
7.6.1 Draining the cooling liquid on the Hepta 100 P
1
2
3
Fig. 36:
Draining the cooling liquid
1 Filler screw
3
Drain screw
2 Drain screw
Maintenance
48/70
