Installation
17
Piping to the pump must be suspended or supported.
– Physical forces from the piping system must not be allowed to act on vacuum
pumps.
Lay piping from the pump sloping downward so that no condensate can flow back into
the pump; otherwise fit a condensate separator.
– If an air trap is created in the system, then a device for draining condensation water
must be provided at the lowest point.
Connecting to the
mains power supply
The pumps are shipped as standard with a three-phase motor, but without accessories
for the electrical connection. Connection according to regulations requires the use of a
suitable motor protection switch. The setting of the motor protection switch must corre-
spond to the specification on the rating plate of the pump motor in question.
Check the direction of rotation for pumps with three-phase motors in accordance with
the description in the operating manual of the individual components (see the arrow
on the housing).
The operator must provide suitable safety devices, when connecting the pumping sta-
tion, for the separation of the pumping station from the mains (e.g. main switch or
emergency-stop button), so that the pumping station can be switched off in an emer-
gency situation without any problems.
Versions with a control cabinet
Pumping stations with a control cabinet are completely wired internally. The drive motors
of the Roots and backing pumps are already wired so they rotate in the same direction.
Make electrical connections according to the wiring diagrams located in the control
cabinet when the pumping station was shipped.
Fuse
In the version with a control cabinet the phase sequence relay has a monitoring function.
If a measuring tube is connected, the associated power supply unit has an internal 100
mA microfuse.
WARNING
Emission of toxic substances from the exhaust!
Danger of poisoning from emitted gases or vapours, which can be detrimental to health
and/or can pollute the environment, depending on the particular application.
Comply with the applicable regulations when working with toxic substances.
Only officially approved filter systems may be used to separate and remove these
substances.
DANGER
Voltage-bearing elements
Danger to life from electric shock.
The electrical connection can be carried out only by trained and authorised electri-
cians.
Disconnect the power supply and secure it against being switched back on.
Ensure the system is adequately earthed.
