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MVA 02 rev 5 - December 2017
Step
Operation
Description
1
Positioning of motor [1]
The motor must be positioned on its base without fully tightening its
fixing fasteners.
2
Fitting of impeller [2] on
motor shaft
IMPORTANT:
If necessary, reduce the diameter of the motor shaft until its
nominal size is reached with a tolerance of +0/+5 microns.
Assembly with excessive play can cause vibrations. Forced
assembly creates deformations and vibrations, also making it more
difficult to remove the impeller.
After the impeller has been fitted to the projection on the motor
shaft and the head washer has been fully fixed, a check must be
made to ensure that the clearance between the impeller and the
casing
(3)
is constant around the entire circumference. If clearance
is not constant, correct the position of the motor support base.
3
Fixing of motor
Fully tighten the motor fixing nuts (see paragraphs 10.1.1 and
10.2.1 for details).
4
Fitting of guards [4]
Protect all moving parts with the envisaged guards.
Chart 5-1 Sequence of operations for assembly of version 4 fans
(refer to Fig. 5-3 for the identification of components)
5.2.2
Version 1 axial fans
Fig. 5-4 Assembly of version 1 axial fans
