1 Safety
1.3
1.4 Servicing
The fan may only be serviced when the electrical
system is dead, i.e.:
— turn off the electrical machines and ensure
that they cannot be switched on again,
— wait until the rotor has come to a standstill,
— remove the motor fuse,
— disconnect the power supply cable for the
motor.
After servicing all guards and protective devices
must be installed and the fan must be ducted again.
All bolts and nuts must be tightened. Close all
inspection openings and tighten the bolts and nuts.
The fan can then be put into operation again.
1.5 Cleaning
Do not clean moving parts when the fan is in
operation!
Before cleaning the fan must be put out of
operation. Ensure that the fan cannot be switched
on again accidentally. Only use suitable detergents
and cleaning materials.
Remove any dirt wiped off the impeller from the fan
housing.
If material is sticking to the impeller or the
impeller is worn, the fan may be seriously
damaged by unbalance. It is therefore
recommended to clean and check the fan
for unusual vibrations at regular intervals.
