▪ If necessary, incorporate exible bellows in the system pipelines to▪
reduce the transmission of vibration and to prevent loading of the
coupling joints. If using exible bellows, make sure that bellows have
a maximum pr
essure rating which is greater than the highest pressure
that can be generated in the system. Manufacturer's bellows are
recommended.
▪ Incorporate an inlet isolation valve in the pipeline between the vacuum▪
system and pump. This will isolate the vacuum system from the pump
when it is switched off and prevent the suck‑back of process gases and
debris into the vacuum system.
▪ Make sure that the sealing surfaces are clean and scratch‑free.▪
We recommend using an exhaust extraction system suitable for use with all
process gases that will be pumped. Make sure that the exhaust extraction
system cannot become blocked or obstructed when the pump is operating.
A small amount of tip seal wear product may collect in the exhaust duct of
the pump. The dust may be blown out with the initial burst of air after the
pump has been vented. This is quite common and the amount of dust seen
will reduce over time.
Leak test the system and seal any leaks found after pump installation.
6.6Electrical installation 1-phase
Fuses and circuit breakers
CAUTION: PROTECTIVE EARTH CONNECTION
Risk of injury. Make sure that the electrical installation of the pump conforms to
your local and national safety requirements. It must be connected to a suitably
fused and protected electrical supply with a suitable earth point.
For recommended fuse ratings refer to
and for
recommended main cord sets refer to
Make sure that the access of the power cable to the pump is not obstructed
when you locate the pump.
Route and secure cables, hoses and pipework during installation to avoid
possible risk of trips.
If an overload circuit breaker is used, make sure that is a time lag type.
If using an earth leakage current device, for example a Residual Current
Device (RCD), use a 30 mA (minimum) rated unit to avoid nuisance tripping
during start up.
The live conductor is fused inside the pump controller while the neutral
conductor is not. An external RCD should be installed to guard against
damage in the event of a short circuit between neutral and earth.
Electrical supply connection
Use an IEC 60320 connector (C19) and cable that meets local electrical
standards when connecting to the pump. The pump must be earthed via the
earth conductor of the IEC 60320 connector.
An additional earth connection point is provided if a separate earth is
required. We recommend tting a separate earth to the pump using a
non-insulated braid or a separate insulated green/yellow conductor. The
conductor must be a minimum of 14 AWG. Use the M5x10 screw and
300668736_002_C7 - © Leybold 29
Installation
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