8 Operation
8.1 Putting the vacuum pump into operation
Important settings and function-related variables are factory-programmed into the vacuum pump elec-
tronic drive unit as parameters. Each parameter has a three-digit number and a description. Parameter-
driven operation and control is supported via Pfeiffer Vacuum displays and control units, or externally
via RS-485 using Pfeiffer Vacuum protocol.
WARNING
Danger of poisoning due to toxic process media escaping from the exhaust pipe
During operation with no exhaust line, the vacuum pump allows exhaust gases and vapors to escape
freely into the air. There is a risk of injury and fatality due to poisoning in processes with toxic process
media.
► Observe the pertinent regulations for handling toxic process media.
► Safely purge toxic process media via an exhaust line.
► Use appropriate filter equipment to separate toxic process media.
NOTICE
Vacuum pump damage caused by overpressure
Mixing up the connections causes overpressure overload. The vacuum pump can be started only
against max. 1 bar differential pressure between inlet and outlet; otherwise the motor jams and sus-
tains damage.
► Make sure that the distributor is installed correctly on the diaphragm heads, before connecting
the vacuum pump to the vacuum equipment.
► Before commissioning, make completely sure that the pressure side pressure is below the per-
missible limit.
Parameter
Name
Designation
Adjustment, setting
[P:707]
SpdSVal
Speed-control operation specification
75 %
Tbl. 12:
Factory setting of the electronic drive unit for diaphragm pumps when delivered
Procedure
1. Compare the frequency specifications on the rating plate with the available supply voltage.
2. Check the exhaust connection for free passage (max. permissible pressure: 1100 hPa absolute).
3. Actuate the shut-off units so that the shut-off units open before or at the same time as the vacuum
pump starts up.
8.2 Switching on the vacuum pump
When pumping down dry gases, no special precautions are required.
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.
Prerequisite
● required cable connections are established
Operation
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