higher pressure in the bottom chamber it is not possible to let oil that
drips off the exhaust filters simply flow down to the bottom chamber.
Version with oil return line to the suction connection (RC ... C):
Therefore the oil that accumulates in the upper chamber is sucked
through the oil return line right to the suction connection.
Version with oil return line to the B-cover (RA ... C, 2 mbar):
Therefore the oil that accumulates in the upper chamber is sucked
through the oil return line right to the cylinder chamber.
Version with oil return valve (RA ... C, 0.5 mbar):
At continuous operation this would cause the entire supply of oil to ac-
cumulate at the bottom of the upper chamber, expel oil droplets
through the gas discharge/pressure connection and let the pump run
dry. Therefore the vacuum pump must be shut down at the latest after
2 hours of continuous operation, depending on the operating condi-
tions even after a shorter period, for at least approx. 15 minutes
(
Ú
page 8: Operation Notes). After turning off the vacuum pump the
pressure difference between the inside and the outside of the exhaust
filter(s) collapses, hence the two chambers of the oil separator assume
an equal pressure level, the oil return valve between the two chambers
opens and the accumulated oil in the upper chamber can run down to
the bottom chamber.
Cooling
The vacuum pump is cooled by
–
radiation of heat from the surface of the vacuum pump incl. oil
separator (e)
–
the air flow from the fan wheel of the drive motor
–
the process gas
Start Controls
The vacuum pump comes without start controls. The control of the
vacuum pump is to be provided in the course of installation.
Safety
Intended Use
Definition
: For the purpose of these instructions, “handling” the
vacuum pump means the transport, storage, installation, commission-
ing, influence on operating conditions, maintenance, troubleshooting
and overhaul of the vacuum pump.
The vacuum pump is intended for industrial use. It shall be handled
only by qualified personnel.
The allowed media and operational limits (
Ú
page 3: Product De-
scription) and the installation prerequisites (
Ú
page 5: Installation
Prerequisites) of the vacuum pump shall be observed both by the
manufacturer of the machinery into which the vacuum pump is to be
incorporated and by the operator.
The maintenance instructions shall be observed.
Prior to handling the vacuum pump these installation and operating
instructions shall be read and understood. If anything remains to be
clarified please contact your Busch representative!
Safety Notes
The vacuum pump has been designed and manufactured according to
state-of-the-art methods. Nevertheless, residual risks may remain.
These operating instructions highlight potential hazards where appro-
priate. Safety notes are tagged with one of the keywords DANGER,
WARNING and CAUTION as follows:
DANGER
_a
Disregard of this safety note will always lead to accidents with fa-
tal or serious injuries.
WARNING
_a
Disregard of this safety note may lead to accidents with fatal or se-
rious injuries.
CAUTION
_a
Disregard of this safety note may lead to accidents with minor inju-
ries or property damage.
Emission of Oil Mist
CAUTION
_a
The non-OEM spares market offers exhaust filters that are geomet-
rically compatible with Busch-vacuum pumps, but do not feature
the high retention capacity of genuine Busch-exhaust filters.
Increased risk of damage to health.
In order to keep the emission on the lowest possible level only gen-
uine Busch-exhaust filters shall be used.
The oil in the process gas is separated to the greatest possible extent,
but not perfectly.
CAUTION
_a
The gas conveyed by the vacuum pump contains remainders of oil.
Aspiration of process gas over extended periods can be harmful.
The room into which the process gas is discharged must be suffi-
ciently vented.
Note
: The possibly sensible smell is not caused by droplets of oil,
though, but either by gaseous process components or by readily vola-
tile and thus gaseous components of the oil (particularly additives).
Noise Emission
For the sound pressure level in free field according to EN ISO 2151
Ú
page 2: Technical Data.
Transport
Note
: Also a vacuum pump, that is not topped up with oil contains res-
idues of oil (from the test run). Always transport and store the vacuum
pump in upright position. Do not put the vacuum pump on its side nor
put it upside down.
Transport in Packaging
Packed on a pallet the vacuum pump is to be transported with a
forklift.
Transport without Packaging
In case the vacuum pump is packed in a cardboard box with inflated
cushions:
◆
Remove the inflated cushions from the box
In case the vacuum pump is in a cardboard box cushioned with rolled
corrugated cardboard:
◆
Remove the corrugated cardboard from the box
In case the vacuum pump is laid in foam:
◆
Remove the foam
●
Grasp the vacuum pump with both hands
Alternatively:
●
Loop a belt/rope around the coupling lantern (
Ú
illustration)
4
