NCF fan
6.3 Disassembly
WARNING! Risk of personal injury
All the disassembly and reassembly operations described below must only be carried out by qualified and
authorised personnel. For no reason whatsoever must the operator or factory personnel carry out these
operations.
CAUTION! Risk of equipment damage
All the disassembly and reassembly work must be carried out under the following conditions:
• You must be absolutely certain that the NCF fan is completely stationary (impeller at rest); disconnect
the electrical power at the main panel with the switch, lock the switch with a padlock and hand the key
to the head of maintenance.
• The working environment must be equipped with every tool necessary and must be free of any haz-
ards.
• Every piece to be refitted must be thoroughly cleaned, degreased and lubricated as necessary before
refitting.
6.3.1 Intake nozzles
• Undo the nozzle securing nuts from the NCF fan housing. Slide out the nozzle.
6.3.2 Housing
With all orientable fans, the housing is secured to the frame by bolts. Simply undo the securing nuts at the
frame plate. With non-orientable fans with single-piece housings, the housing cannot be disassembled. The
housing in certain fan types may be divided into two or more pieces, secured together by bolts.
6.3.3 Impeller
• Remove the nozzle and, where possible, the NCF fan housing. With single intake fans: remove the screw with
the lock ring and use a suitably sized extractor. We recommend setting up support for the impeller before ex-
tracting it completely. In any event, this operation must always be carried out with great care, avoiding any
knocks that could alter the balance of the impeller or deform it.
6.4 Flexible anti-vibration joints between the NCF fan and ducting
Flexible joints are located between the NCF fan and exit and/or intake ducting must be checked visually to en-
sure that they are undamaged and that no flexible components have become detached. If these joints must be
dismantled for maintenance of the system and/or the fan, they must be reassembled taking the precautions in-
dicated for the first assembly/installation.
EN
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