Maintenance/repair
Maintenance operations
Fan with dust protection filter
9
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Lenze • BA 33.0006 • 5.1
9.3.2 Fan with dust protection filter
For the motors, dry filters are used.
Note!
The dust protection filter is mounted to the fan unit. Depending on the
amount of dust, the filter must be cleaned completely or replaced at
regular intervals!
Polluted filters substantially reduce the amount of cooling air. This brings about higher
winding temperatures, reduces the filters’ service life and may cause damage to the
filters.
When replacing the filters it must be ensured that all covers as well as the filter are fit
tightly, therefore preventing t he occurrence of leakages for a damaging ingress of dust!
Inthecaseofmoist dust, new filter mats must be mounted. At the latest when the filter
is replaced for the first time it should be checked that the interior of the motor is clean.
9.3.3 Motors with bearing relubricating devices
Under normal operating conditions, the bearings used have a service life of approx.
20.000 operating hours. Ex works the bearings are filled with a high-quality,
heat-resistant roller bearing grease. (The permissible operating temperature range of
the grease used is between -25°C and +120°C).
Relubrication period, type of grease and amount of grease are stated on an additional
indicating label on the motor.
Manufacturer designation
Relubrication period
Designation of grease type according to
DIN51502
Amount of grease
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