Pfeiffer Vacuum DUO 5 MC, Руководство по эксплуатации, Страница: 30 / 60

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.
● Low final pressures are possible with the gas ballast valve closed.
Switch vacuum pump on
1. If required, switch vacuum pump on in each pressure range.
2. Switch vacuum pump on at mains switch, or, in the case of three phase motors, on site via a pro-
tective circuit.
3. Prior to process start, allow vacuum pump to warm up for approx. 30 minutes with vacuum con-
nection closed.
Inspect operating fluid level
1. Regularly check operating fluid level while vacuum pump is running and at operating temperature.
2. Make sure that fill level is within markings on sight glass.
3. Check operating fluid fill level daily during continuous operation, and every time 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.
Behavior of process gases with condensable vapors
► Operate the vacuum pump with gas ballast, i.e. with the gas ballast valve open.
6.3.1 Gas ballast valve – standard version
The gas ballast valve has the function to periodically supply air to the working chamber of the vacuum
pump at the beginning of the compression phase. This prevents condensation from forming in the vac-
uum pump, when pumping down vapors.
Operation
30/60