4. Once free of the pulleys, unhook the belt between one impeller blade, repeating
this operation for the remaining five blades.
5. Remove the two Allen screws, that are fixing the shutters open mechanism with
the central shutter. Continue removing the old belt to being replacement with
the new one.
6. Pass the new belt between the shutters open mechanism and the central
shutter. Put back both Allen screws removed previously and assure that are
properly tightened.
7. Insert the new drive belt between one impeller blade and the locking point,
repeating this operation for the other five blades.
8. Place the belt over the motor pulley and, as far as possible, over the impeller
pulley; turn the impeller pulley so that the belt snaps completely into place in its
groove.
WARNING: DO NOT apply any force to the impeller blades as they could
become misaligned or bent.
9. Check the deflection of the belt; if the tension force is below the prescribed level,
adjust it as detailed in the previous paragraph.
10. Replace the drive belt plastic protection, close the meshes and, finally, adjust
the screws on the mesh fasteners.
NOTE: It is recommended to only use original spare parts. Contact the official
S&P distributor to obtain original replacement parts.
WARNING: Non-original spare parts that may be used, are not guaranteed to
resist the forces that may be applied during normal operation.
9
PERIODS OF INACTIVITY
Recommended actions in case it is necessary to take the extractor out of
service, and/or keep it inactive for a prolonged period of time (for example,
during winter).
It should be protected from damp and the elements.
Disconnect the machine from the electrical supply.
Make sure that the air input has been meticulously sealed.
NOTE: To correctly seal the air input, S&P HIT / HIB INSULATING COVERS can
be used (Figure 11). See section 3.4 of this manual.
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