MVA 02 rev 5 - December 2017
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8
MAINTENANCE
Read this section carefully before carrying out maintenance operations on the fan. This will
ensure greater conditions of safety for maintenance personnel and greater reliability of the
work done.
The safety rules to be respected during maintenance operations on the fan are as follows:
Maintenance and/or lubrication operations must be carried out only by qualified and expert personnel,
authorized by the technical management of the factory, in conformity with applicable safety directives and
standards, using tools, equipment and products suitable for the purpose.
During maintenance operations, suitable clothing must be worn, such as closely-fitting overalls and safety
footwear, absolutely avoiding garments that are bulky or with loose parts.
During maintenance operations on the fan, it is advisable to fence it off and to identify it with signs with the
wording: "FAN UNDERGOING MAINTENANCE".
CAUTION:
The fan must be disconnected and isolated from the electrical power supply during
maintenance operations. Always check that the impeller and motor are at a standstill before
accessing the fan and its components or opening the inspection hatch.
In the case of fans that move hot fluids, wait for the fan to cool down before carrying out
maintenance operations, so as to prevent contact with surfaces at high temperatures.
In the case of maintenance operations on rotating parts or parts inside ducts, it is also necessary:
where present, to disconnect the flexible motor coupling;
where present, to remove drive belts from pulleys.
CAUTION:
In the case of use of a multi-stage fan, disconnect the electrical power supply from the entire
multi-stage fan and check that the impeller is at a total standstill before carrying out any
maintenance operation.
The person responsible for maintenance must use a team of persons so as to guarantee absolute
coordination between the persons and the maximum safety for persons exposed to risk. All persons
preparing to carry out maintenance operations must be in full visual contact to warn of possible hazards.
CAUTION:
Any necessary movement of parts to be removed or disassembled from the machine must be
made with suitable transport and lifting equipment.
Generally, special or specific equipment is not necessary for the fan maintenance operations.
Full systematic maintenance of the fan is necessary for its normal correct operation, and is
also a factor of safety for operatives.
