6.4 Refilling operating fluid
WARNING
Risk of injury from reactive, potentially explosive or otherwise hazardous gas/air mixtures
Uncontrolled exchange of gases when opening the housing could potentially generate a potentially
explosive mixture of gas and air in the vacuum system or even outside of the vacuum pump. Ignition
can cause very serious injuries.
► Respect segregation of the zones when filling the operating fluid.
Refill with operating fluid before the minimum fill level is reached.
max.
min.
1
2
Fig. 14:
Filling the operating fluid
1 Filling screw for operating fluid
2
O-ring
Consumable
● Operating fluid
Required tools
● Allen key, WAF 6 mm
● Calibrated torque wrench (tightening factor ≤ 2.5)
Filling the operating fluid
1. Switch off the vacuum pump.
2. Unscrew the operating fluid filler screw.
3. Refill with operating fluid up to the “max.” mark before the minimum fill level is reached.
4. Screw the operating fluid filler screw back in, taking care of the O-ring.
– Tightening torque:
3.0 Nm
6.5 Switching off the vacuum pump
NOTICE
Contamination from operating fluid backflow
After the vacuum pump is switched off, there is a risk that the connected vacuum system can become
contaminated by backflow. The safety valve on the vacuum pump is not suitable for longer-term seal-
ing.
► Install an additional shut-off valve in the intake line.
► Shut off the intake line immediately after switching off the vacuum pump.
Operation
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