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MVA 02 rev 5 - December 2017
2.6
Life cycle of fan
The reliability of all components is guaranteed by a production process with ISO 9001 certification and by
compliance with the programmed maintenance intervals indicated in paragraph 12.3 of this manual.
The components normally subject to wear are the following:
bearings, calculated for a theoretical duration normally of 40,000 hours
drive belts, calculated for a theoretical duration of 25,000 hours
For safety reasons, guards in electrowelded wire must be replaced every 2
–3 years.
In the hypothesis of use of the fan at constant speed for two work shifts every day equivalent to 16 hours,
calculated for 250 days per year, the expected life cycle for the impeller is equivalent to 40,000 hours.
In case of use in conditions of particularly difficult operation (medium, high), this limit must be reduced. Any
such reduction must be assessed in collaboration with the
FVI
Technical Office. In the specific case of
operation at variable speeds, the impeller life cycle must be assessed on a case-by-case basis, and must
also be agreed with the
FVI
Technical Office.
CAUTION:
Do not exceed the maximum rotation speed indicated by FVI.
Do not use ON-OFF operating cycles unless expressly approved by FVI.
Do not use variable-speed cycles unless expressly approved by FVI.
Do not subject the fan to thermal gradients greater than 3°C/minute.
Even if it has never operated, an impeller that has been stored for more than ten years must be checked by
FVI
for possible defects before it can be used.
