Lenze MDFQA Operating Instructions - Manual (Page 41)

Maintenance/repair
Maintenance operations
Fan with dust protection filter
9
EN
41 Lenze ¯ BA 33.0006 ¯ 3.0
9.3.2 Fan with dust protection filter
Dry−type filters are used for the motors. Dry dust should be removed completely by
tapping.
)
Note!
The dust filter is mounted on the ventilation aggregate. Depending on
the amount of dust, the filter must be cleaned and replaced in regular
intervals!
Soiled filters reduce the amount of cooling air significantly. This leads to a higher
winding temperature, reduces its service life and may lead to damages.
When replacing the filter you must take care that all covers and filters are tightly fixed
so that there are no leaks for harmful dust!
In case of wet dust you must install new filter mats. The internal cleanness of the motor
should be checked at the latest when you replace the filter for the first time.
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.
0 Manufacturer designation 2 Relubrication period
1 Designation of grease type according to
DIN51502 3 Amount of grease