VACUUBRAND ME 4R - Manual (Page 9)

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. Manual-no.: 999122 / 02/09/2009
page 9 of 21
Installing in a vacuum system:
☞ Avoid throttling losses by using connecting pipes with large diameter and keep
them as short as possible.
☞ Reduce the transmission of vibration and prevent loading due to rigid pipelines.
Insert elastic hoses or flexible elements as couplings between the pump and rigid
pipes. Attention: Flexible elements tend to shrink when evacuated.
☞ Use a suitable valve to isolate the pump from the vacuum system if you need to
allow the pump to warm up before you pump condensable vapours or if you clean
the pump before it is switched off.
☞ When operating the equipment as vacuum pump make sure that the exhaust
pipeline cannot become blocked.
☞ Connect the exhaust to a suitable treatment plant to prevent the discharge of dan-
gerous gases and vapours to the surrounding atmosphere. The exhaust pipeline
must always be installed in a declining way to prevent the drainage of condensate
back into the pump.
☞ When operating the device as a pressure pump ensure that the maximally gener-
ated overpressure is compatible with the mechanical stability of the pressure ves-
sel.
Before operation:
☞ Max. ambient temperature: 40 °C.
☞ Make sure ventilation is adequate if pump is installed in a housing or if ambient
temperature is elevated.
☞ If pump is installed in altitudes of more than 1000 m above mean sea level check
compatibility with applicable safety requirements, e. g. DIN VDE 0530 (motor may
overheat due to insufficient cooling).
☞ When assembling, ensure vacuum-tightness. After assembly, check the com-
plete system for leaks.
Use and operation
Notes prior to the use of the manometers:
The manometers used are manometers with glycerin filling. The overpressure ma-
nometer indicates the overpressure relative to the atmospheric pressure at the place
of installation. The vacuum meter indicates the absolute pressure.
➨ Install the pump in the room of operation.
➨ Prior to use the reference chambers of some of the manometers (depending on
the model of manometer) have to be ventilated.
☞ Else, not ventilating the manometer may lead to a systematic measuring error.
There are different types of manometers. To ventilate the reference chamber check
which types of manometers are installed at the pump and proceed according to the
given instructions:
A: Manometer with pressure compensation valve
Ventilate the manometer using the pressure compensation
valve. Close the valve after ventilation.
☞ Repeat if necessary until dial shows zero with measuring
connection ventilated to atmosphere.
pressure
compensation
valve