MAX
MIN
MAX
MIN
MAX
MIN
Fig. 27:
Checking the lubricant level
Checking the lubricant level
1. Shut down the vacuum pump.
2. Wait for 1 minute and check the lubricant level at the sight glass.
– Check the lubricant level on the motor side and the vacuum side.
3. Make sure that the level is in the area at the middle of the inspection glass or up to 3 mm above it.
4. Top up lubricant as required.
5. Check the lubricant level daily during continuous operation, or prior to each activation.
7.4 Checking the cooling liquid level
Checking the fill level
If the fill level is correct, the coolant fills the overflow.
Prerequisite
● Vacuum pump switched off and cooled
1
2
Fig. 28:
Checking the cooling liquid level
1 Venting screw
2
Overflow
Checking the cooling liquid level
1. Unscrew the venting screw.
2. Check the cooling liquid level in the overflow.
– If the level is correct, the coolant reaches the top edge.
3. Top up cooling liquid as required.
4. Screw in the venting screw.
5. Check the cooling liquid level daily during continuous operation, or always prior to switching on.
7.5 Changing lubricant
WARNING
Health hazard and environmental damage from toxic contaminated lubricant
Toxic process media can cause lubricant contamination. When changing the lubricant, there is a
health hazard due to contact with poisonous substances. Illegal disposal of toxic substances causes
environmental damage.
► Wear suitable personal protective equipment when handling these media.
► Dispose of the lubricant according to locally applicable regulations.
Maintenance
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