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www.hlu.eu
06.2019
The work intervals specied below are intended for single-shift opera-
tion (8 hours a day; 22 days a month; 12 months a year).
d
w
m
½ y
= daily
= weekly
= monthly
= half-yearly
y
R
LT
MO
= yearly
= cleaning required when opening
= lifetime
= manufacturer operating manual
8.1 Cleaning
Don‘t use any sharp objects or tools for cleaning. Only objects that are
explicitly provided for this purpose are suitable.
Cleaning
(Depending to the degree of contamination the cleaning intervals
must be adapted) Interval
Keep the fan and the area around the fan free from deposits on the outside regu-
larly (e.g. dust, exhaust uids).
w
Check the impeller regularly for contaminations and cakings and clean it, if
necessary.
Caution
Contaminations on the impeller can cause imbalance of the fan.
Depending on the intensity, this can even cause the destruction of the fan.
½ y
Make sure that the cooling ns of the electric motor are not clogged by pollution in
order to avoid overheating, if necessary clean them.
m
Cleaning, maintenance and repair work may be done only at
non-explosive atmosphere.
For reasons of safety, only tools made of non-sparking material may
be used when doing this work.
Caution
When doing cleaning work, wear protective equipment in complian-
ce with the operational regulations for occupational health and safety
(e.g. protective gloves).
When doing maintenance and repair work, mind the hazards due to
electric current.
Operating manual
Centrifugal fans
HF R | RV | MRV
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