Elmo Rietschle L-BV7 - Manual (Page 36)

610.48060.40.000 36 / 64 © Gardner Denver Deutschland GmbH
Servicing
11 Servicing
 DANGER
Electrical danger!
Before beginning work on the
unit or system, the following
measures must be carried out:
 Deenergize.
 Secure against being
switched on again.
 Determine whether
deenergized.
 Ground and short-circuit.
 Cover or block off adjacent
energized parts.
 WARNING
Danger due to gauge pressure
and vacuum!
Danger due to escaping fluid!
Before beginning work on the
unit or system:
 Interrupt supply of operating
liquid.
 Bleed lines and vacuum
pump/compressor
(depressurize).
 WARNING
Danger from rotating external
fan of unit!
It is prohibited to remove the fan
guard!
 WARNING
Danger from rotating impeller
of unit!
Do not remove the vacuum
pump/compressor housing until
after the unit has been shut down
and the impeller has come to a
complete stop!
Consider that the impeller has a
certain run-out!
 WARNING
Danger of burns and scalding
from hot surfaces of the pump-
motor unit and from hot fluids!
Do not touch during operation!
Allow to cool after shut-down!
 WARNING
When working on the unit,
there is a danger of injury,
e.g. in the form of cuts/cutting
off, crushing and burns!
During transport/handling as well
as assembly and disassembly
always wear personal protective
equipment (safety helmet,
protective gloves, safety boots)!
11.1 Maintenance
The pump-motor unit is largely maintenance-
free.
However, if dirt or solid matter (e.g. sand) or
lime deposits get into the unit through the
operating liquid and/or the pumped
gases/vapors, then it is necessary to clean the
unit at regular intervals to prevent the impeller
from jamming up and to avoid wearing of the
impeller and the vacuum pump/compressor
housing.
Refer to the following table: