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PROCEDURE FOR REPLACING THE MOTOR
This maintenance operation must be carried out with the power to the system switched off, by qualified personnel only.
Overall remarks on fans:
The fan is connected to the collector system at the air inlet and outlet by flexible sleeves.
The impeller is keyed to the motor shaft and blocked by a screw at the end of the shaft.
The fan is mounted on four anti-vibration mounts on its support.
a)
Separate the flexible sleeves at the fan inlet and outlet
b)
Undo the wiring of the motor electrical power supply after first unlocking its main power
c)
Place the fan on the floor (unscrew the anti-vibration mounts)
d)
Unscrew the scroll from the fan support seat, with the nuts placed on the motor side
e)
Clear away the fan scroll
f)
With a hub puller, pull the impeller off the motor shaft carefully, without knocking it
g)
Remove the motor after identifying the location of the motor tabs on the support seat
h)
Put in the new motor, aligning it on the marks of the tabs of the support seat, tighten it slightly
i)
Replace the impeller
j)
Put the fan scroll back on the support seat
k)
Before locking the motor finally in place, first rotate the impeller to check that it does not rub against the entry mouth
l)
If there is any mechanical friction, move the motor back from the seat till the noise disappears entirely and lock it finally in
place
m)
Put back the fan on its support and lock the anti-vibration mounts
Wire the motor and put back the flexible air inlet and outlet sleeves
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8695 8594 / D
FIXED FANS
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