GLEC-6 - Installation and maintenance
14
FläktGroup
DC-10087-GB 2018-01-03_R0
Specifications are subject to alteration without notice
7.2.3 CHECKING THE MOTOR BEARINGS
If the fan is used as a dual purpose fan, the motor bearings shall
be checked twice a year. After 40.000 hours it is recommended
to change the motor.
It is recommended to change the motor every three years.
7.2.4 CLEANING THE IMPELLER
The maximum permissible vibration level measured from the mo-
tor bearing is 7,1 mm/s RMS.
The impeller can be cleaned using a vacuum cleaner, com-
pressed air or by brushing. If the impeller is coated with greasy
dirt, it can be washed with a detergent or a solvent. The cleaning
is done if necessary, but a control inspection should be done at
least once a year. Badly tarnished impeller will result in lower ef-
ficiency of the fan and increases energy consumption.
7.2.5 CLEANING THE FAN CASING
The inside of fan the casing can be cleaned same way as the
impeller.
7.3 FINAL INSPECTION
Check that:
- The overlap between the impeller and the inlet cone is same
as before maintenance.
- The inlet cone is aligned precisely with the impeller.
- All screws and nuts have been tightened.
- Glass fiber sealing is in good condition.
- No foreign objects have been left in the fan or in the ducting.
7.4 FAULTS
If any faults occur during inspection which cannot be repaired by
maintenance personnel, please contact the service department at
Fläkt Woods.
Examples of faults can include the following issues:
- foreign particles inside fan
- corrosive media inside
- too high vibrations
- incorrect maintenance
Possible problems generated:
- bearing damage
- corrosion damage
- vibration generated damage
