Pfeiffer Vacuum Hena 26, Руководство по эксплуатации, Страница: 32 / 66

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
● You can switch on the vacuum pump in every pressure range, between atmospheric pressure and
final pressure.
● The optimal operating condition of the vacuum pump is continuous operation.
● When pumping down dry gases, no special precautions are required.
● If the gas ballast system is permanently open, this limits the achievable final pressure of the vac-
uum pump.
● Low final pressures are possible with the gas ballast valve closed. To seal or control the gas bal-
last system, there are various accessories available.
Switching on the vacuum pump
1. If required, switch the vacuum pump on in each pressure range.
2. Shut off the vacuum connection.
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 modes
Automatic start
After bridging the contacts at pins 8 and 9 on the connecting plug or when using a connec-
tion cable with respective bridges and applying the supply voltage, the vacuum pump starts
up immediately.
Pfeiffer Vacuum therefore recommends switching on the voltage supply immediately before
operation.
Possible operating mode of the electronic drive unit
● Operation without control unit
Operation without control unit
1. Connect the corresponding connection cable to the control input with bridges from the Pfeiff-
er Vacuum accessories or the supplied D-Sub mating plug.
2. Provide the current supply.
Operation
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