Checking the cooling liquid level
1. Unscrew the filler screw.
2. Check the cooling liquid level at the tip of the filler screw.
3. Top up cooling liquid as required.
4. Check the cooling liquid level daily during continuous operation, or always prior to switching on.
7.4.2 Approach for the Hepta 200 P | 300 P
Checking the fill level
The correct fill level is between the MIN/MAX markings or within the ring mark on the sight
glass.
MAX
MIN
MAX
MIN
MAX
MIN
Fig. 31:
Checking the cooling liquid level
Checking the cooling liquid level
1. Shut down the vacuum pump.
2. Check the cooling liquid level at the cooling liquid sight glass.
3. Top up cooling liquid as required.
4. Check the cooling liquid level daily during continuous operation, or always prior to switching on.
7.5 Changing the 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.
CAUTION
Scalding from hot lubricant
Danger of scalding when draining lubricant if it comes into contact with the skin.
► Wear protective equipment.
► Use a suitable collection receptacle.
NOTICE
Property damage from using non-approved lubricant
Attainment of product-specific performance data is not ensured. If non-approved lubricants are used,
all liability and warranty claims against Pfeiffer Vacuum are excluded.
► Use only lubricants approved by Pfeiffer Vacuum.
► Use alternative, application-specific lubricants only following consultation with Pfeiffer Vacuum.
Pfeiffer Vacuum recommends determining the precise service life of the lubricant in
the first operating year.
The usable life may deviate from the reference value specified depending on thermic and
chemical loads, or due to penetrating process media in gear and bearing chambers.
Maintenance
44/70
