Documents are only to be used and distributed completely and unchanged. It is strictly the users’ responsibility to check carefully
the validity of this document with respect to his product.
page 11 of 24
No. 47800-2-02-5
Use and operation
Installing in a vacuum system
• Connection lines at the pump inlet have to be gas tight. Particles and dust must
not be aspirated, the user has to provide appropriate filters if necessary. The user
must ensure their suitability concerning gas flow, chemical resistance and safe
-
ness against clogging prior to use.
• Connect an exhaust line gas tight at the pump outlet if necessary. Always dispose
of exhaust gases appropriately (e.g. into a fume hood). If there is risk of release of
dangerous or polluting fluids, install an appropriate system to catch and dispose
of those fluids.
• Reduce the transmission of vibration and prevent mechanical load due to rig
-
id pipelines. Insert elastic hoses or flexible elements as couplings between the
pump and rigid pipes.
Attention:
Flexible elements tend to shrink when evacu-
ated.
• The gas outlet must never be blocked. The exhaust line has always to be free
(pressureless) to ensure an unimpeded discharge of gas.
• Especially if the gas ballast valve is open, a power failure may cause accidental
ventilation of the pump. In case this constitutes a potential source of danger, take
appropriate safety measures.
•
Pump with dual-voltage motor
: Check that the voltage changeover switch at
the terminal box is positioned correctly.
Attention
: If the pump is switched on with wrong voltage selection, the motor
may be damaged!
Before starting the pump, check that the voltage changeover switch at the termi-
nal box is correctly positioned.
Change the selection at the voltage changeover switch only if the pump is
separated from mains.
• Make sure ventilation is adequate especially if the pump is installed in a housing
or if the ambient temperature is elevated. Provide external ventilation if neces-
sary. Keep a distance of minimum 20 cm between fan and ambient parts.
Avoid throttling losses by using connecting pipes with large diameter and by keeping
them as short as possible.
In case of perturbing exhaust noise connect an exhaust hose or use a silencer. Install
outlet pipelines always falling to avoid backflow of condensate towards the pump.
Use of a suitable valve to isolate the pump from the vacuum system is recommended
to allow the pump to warm up before pumping condensable vapours or to clean the
pump before it is switched off.
When assembling, ensure
vacuum-tightness
. After assembly, check the whole sys-
tem for leaks.
Secure hose connections at the pump appropriately against accidental detaching.
NOTICE
Voltage selection switch:
1. Disconnect the electrical power cord.
2. Use a screw driver to adjust the
voltage selection switch
at the terminal
box of the pump to the supply voltage:
”120” corresponds to 90-126 V and ”240” corresponds to 180-253 V.
voltage selection
switch
