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.: 999019 / 22/12/2009
page 7 of 29
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If the diaphragm pump is shut down, the Roots pump is not shut down automati-
cally. However, the variable speed drive of the Roots pumps of the pumping units
RP 15C/22C/35C VARIO reduces the speed of the Roots pump following a limiting
current regulation, if necessary to standstill of the Roots pump. In case of excess
temperature, the motor of the Roots pump is shut down by a separate
self-hold
thermal cutout
in the winding.
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If the Roots pump is shut down or if the speed of the pumping units RP 15C/22C/
35C VARIO is reduced, the diaphragm pump continues to run.
Attention
: In each case manual reset is necessary. Switch off the pumping unit or
isolate the equipment from mains. Identify and eliminate the cause of failure. Allow the
pump to cool down sufficiently before restart.
Ensure that in case of failure the pump and the vacuum system always will turn into a
safe status.
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In case of diaphragm cracks or leaks in the manifold pumped substances might be
released into the environment or into the pump housing. To reduce the risk of leaks,
ask for a diaphragm pump with additional safety diaphragm.
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Comply especially with notes on operation and use and maintenance.
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Failure of the pump (e. g. due to power failure) must not lead to a critical dangerous
situation under any circumstances.
Electronic equipment is never 100% fail-safe. This may lead to an indefinite status of
the equipment. Provide protective measures against misfunction and failure.
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Operating the pump, stand still of the pump or operating the air admittance valve
must not lead to a critical dangerous situation under any circumstances.
Under normal conditions, pump oils and lubrications are not toxic and their use entails
no danger. Certain hazards are, however, associated with some of these products. The
following precautions must be adopted during use and operation in order to meet health
and safety requirements.
Adopt precautionary measures
(e. g. wear appropriate safety-clothing and protective
goggles) to avoid excessive contact with the skin and possible skin irritations (includ-
ing dermatitis).
Do not inhale or swallow. Maintain adequate levels of hygiene and cleanliness.
Ensure that the pump location is well ventilated and that possible toxic effects of
certain vapours are avoided.
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Use suitable collecting and disposing systems if necessary.
Operate the roots pump only, if the oil filling is sufficient (see section ”Oil change”).
Use only
oil of the recommended type
.
Other oils or operating fluids may cause dangers or damage of the pump.
Use only
genuine spare parts and accessories.
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Otherwise safety and performance of the equipment as well as the electromagnetic
compatibility of the equipment might be reduced.
Possibly the CE mark becomes void if not using genuine spare parts.
Use special oils
for the roots pump if:
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The pump operates in the vicinity of potential ignition sources.
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Oxygen or other flammable gases account for a large proportion of the evacuated
gases.
Do not allow oils to be poured into or enter the drainage system or other bodies of water.
Spillage can cause accidents. Use suitable means for removing spilt oil.
Observe all relevant statutory requirements and regulations concerning the use, stor-
age and disposal of oil.
