Operating instructions

89
REMARK
In general the fan is subject to abrasion, therefore fan typical actions are recommended to check
the fan on regular basis (scheduled maintenance), including testing of propeller on abrasion /
deposition / corrosion and abnormal operating noise.
The used fans are quality products and have a life time of L10=37500 h. Depending on working
conditions, it is recommended to change them after approx. 5 years.