Nederman NCF, Инструкция по эксплуатации, Страница: 21 / 25

NCF
21
EN
checked regularly. Dirt deposits on the rotor or wear of parts of the rotor can
cause undesirable vibrations during fan operation. If any part of the rotor
is excessively worn, it is imperative that the rotor be replaced (for this you
must contact AB Ph. Nederman & Co’s technical assistance service). For any
information and before carrying out any modification to one of our fans,
please contact the technical and quote the part number found on the fan
identification plate.
NOTE! An integrated maintenance program is necessary for normal and
correct operation of the fan, and also ensures greater safety for the operator.
NOTE! Regular cleaning and maintenance together with lubrication, are vital
for ensuring correct operation and greater durability of the fan.
5.2 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!
All the disassembly and reassembly work must be carried out with the
following conditions:
•
You must be absolutely certain that the fan is completely stationary (fan
rotor 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 hazards.
•
Every piece to be refitted must be thoroughly cleaned, degreased and
lubricated as necesasary before refitting.
5.2.1 Intake nozzles
Undo the nozzle securing nuts from the fan housing. Slide out the nozzle.
5.2.2 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.
5.2.3 Fan rotor
Remove the nozzle and, where possible, the fan housing. With single intake
fans: remove the screw together with the lock-ring and use a suitably sized
extractor. We recommend setting up a support for the rotor before extracting
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 rotor or
deform it.