14
Installation
5.3
Connecting the vacuum side
The connection between the pump and the vacuum chamber should be kept as short
as possible and should have at least the nominal diameter of the pump flange. Use a
greater nominal diameter on line lengths > 5 m.
Piping to the pump must be suspended or supported.
– Physical forces from the piping system must not be allowed to act on vacuum
pumps.
Clear welded lines of any welding scales, loose parts etc. before installation.
5.4
Connecting the fore-vacuum side
Choose the cross-section of the exhaust line to be at least the size of the nominal
connection diameter of the Roots pump’s exhaust flange.
Lay the pipes in such a way that the Roots or backing pump will not be subjected to
any mechanical tension.
– Suspension components should be integrated into the piping.
– Ensure that mating flanges are in a parallel position.
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.
5.5
Connecting to the mains power supply
The pumps are supplied with three-phase motors for different voltages and frequencies.
The applicable motor type is shown on its rating plate.
WARNING
Exposed, rotating rolling pistons!
Fingers and hands can become crushed when the intake flange is open.
Keep all body parts out of operating range of the rolling pistons.
Use a wooden handle to rotate the rolling pistons during cleaning.
NOTICE
Danger of intake of solid particles!
Even in clean processes, fouling from the system must be anticipated during initial com-
missioning.
Use a suitable start-up strainer at the intake connection (see accessories).
Ensure that this strainer is only removed when the risk of solid particles entering the
pump can be excluded.
Note loss of pumping speed if necessary.
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.
