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| Adjustment and maintenance operations
R.6.7 Plug fans
Dust can accumulate on the fan impeller which can cause imbalance and vibrations. The fan impeller must therefore be
checked once a year and cleaned, if necessary. Anti-vibration mounts and flexible connections should be checked at
the same time. If the anti-vibration mounts are damaged in any way they must be replaced.
R.6.7.1 Motor
The motor are usually fitted with factory lubricated bearings which require no further lubrication. Larger motors can be
fitted with greasing nipples and bearings which require regular lubrication. Lubricating these types of bearings must be
carried out according to the manufacturer’s instructions.
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