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3 - INSTALLATION
■ Aligning the pulleys
B
By placing a ruler flat against the pulley flange and adhering to the data below.
C
For variable-diameter pulleys, align them along the centre line.
- Hold the pulleys in place with the appropriate tool,
B
- Fit the belts,
- Tension the belts as instructed in the previous section.
IMPORTANT: If changes are made to the drive, make sure that it is compatible with the fan motor assembly, motor current
and the suspensions.
■ Direction of rotation of the impellers
Option: device to measure and check the air flow. Used on centrifugal fans and plug fans.
16
α max < 0.5°
β max < 4 mm per metre of centre distance
C
Centrifugal fan
Low pressure
Centrifugal fan
Moderate pressure
Plug fan
Seen from intake side
Alignment axis
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