CAUTION
Danger of burns on hot surfaces
Depending on the operating and ambient conditions, the surface temperature of the vacuum pump
can increase to above 70 °C.
► Provide suitable touch protection.
NOTICE
Risk of damage to the drive from increased motor current consumption
At an intake pressure of approximately 300 hPa and under unfavorable operating conditions (such as
for example exhaust side counterpressure), the power input exceeds the rated current.
► Limit the maximum power input of 1.5 times the rated current to max. 2 minutes (in accordance
with EN 60034-1).
Cycle operation
Cycle operation with maximum 10 cycles per hour is possible.
Longer operating phases and short downtimes permit a functionally safe operating condi-
tion of the vacuum pump.
Operating Conditions
● The optimal operating condition of the vacuum pump is continuous operation.
● When pumping down dry gases, no special precautions are required.
● The lowest possible ultimate pressures can be achieved with the gas ballast valve closed.
Switching on the vacuum pump
1. If required, switch the vacuum pump on in each pressure range.
2. Close the vacuum connection and gas ballast valve.
3. Allow the vacuum pump to warm up prior to process start, with the vacuum connection closed, for
approx. 30 minutes.
Inspect operating fluid level
1. Regularly check the operating fluid level while the vacuum pump is running and at operating tem-
perature.
2. Make sure that the fill level is within the markings of the sight glass.
3. Check the operating fluid fill level daily during continuous operation, and every time the vacuum
pump is switched on.
6.3 Operating the rotary vane pump with gas ballast
NOTICE
Risk of damage from condensation in vacuum pump
During operation without gas ballast, condensation may form as a result of the vapor compatibility of
the vacuum pump being exceeded.
► Pump condensable vapors only when the vacuum pump is warm and the gas ballast valve open.
► Allow the vacuum pump to run on after process end for another 30 minutes with the gas ballast
valve open.
– This cleans the operating fluid and protects the vacuum pump against corrosion.
No intermediate settings possible
An intermediate setting between open and closed is not possible.
The gas ballast valve supplies air to the working chamber of the vacuum pump periodically at the begin-
ning of the compression phase. When pumping down vapors, this air prevents condensation within cer-
tain limits in the vacuum pump.
Required tool
● Flat-tip screwdriver
Operation
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