Vortice VHD Notice D'emploi Et D'entretien page 17

ENGLISH
CONSIDERATIONS DURING REVISIONS: The following are some points to be taken into account during a revision
to guarantee correct functioning of the fan:
•
The functioning of the fan must be smooth and free of vibrations.
•
The ampere consumption (A) should be measured with a hook-on meter or multimeter can never exceed the
nominal consumption "In(A)" specified in the motor's plate.
•
All screwed elements must be checked that they have not been loosened. In the transmission fans groups VHT,
VCBPT and VCMAPT review that the pulleys are tight and the good state of the belts. The belts should work
regularly and without jolts, they tend to expand through time and specially the first weeks of functioning. That's the
reason why they should be readjusted making sure that the gear shifts are still aligned after the tightening. In
transmissions with more than one belt, the complete set will be replaced, never mix used and new belts.
•
In applications where the fan works in a high dust or greasy air environment, the blades of the impeller or propeller
can be unbalanced due to the accumulation of particles and consequently damage the bearings. Therefore,
cleaning of the rotating element must be done periodically using the maintenance stops or whenever the fan
vibrates or does not work correctly. Never leave the dust inside the fan.
•
In other applications where there is abrasive accumulation of dust the propeller can be worn out, as well as
centrifugal fans used in material transportation (VCMAPD or VCMAPT groups with flat blade impellers). These
worn out pieces should be replaced in case of unbalancing.
•
Those fans stored or not functioning for periods of two or more years, it is recommended a full revision of the
bearings. Before start up the bearings should be replaced in case they are rusty, or dried grease and in bad
condition.
CLEANING: The correct attention, maintenance and cleaning of all installed elements must be done periodically by
the installation responsible. Avoid accumulations of dirt, dust, grease, etc,... main cause of fires and their expansion.
GREASING: depending on the element of the fan different instructions for the greasing should be followed:
•
The bearings of the electrical motors should not need any maintenance, nonetheless it is advised not to exceed
the limit hours established by the manufacturer of the motor (15.000 to 20.000h depending of the brand name) and
under these circumstances replace them.
•
The transmission groups of the axial fans and the bearings used in the centrifugal range, also do not need greasing
but they should be replaced every 10.000 to 15.000h depending on the temperature conditions and humidity of the
circulating air.
•
The self-aligning bearing supports type NP used in the VCBPT and VCMAPT groups and specially in those
reinforced models have external greasers, if not they are prepared for their installation. In these cases such
bearings do not need either maintenance as they are sealed bearings. But if the working conditions are extreme
their life can be extended by greasing them every 500 to 1000 hours of working time. It is very important never mix
grease with different chemical compositions and viscosities.
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