![Helios BK Series Скачать руководство пользователя страница 11](http://html1.mh-extra.com/html/helios/bk-series/bk-series_installation-and-operating-instructions-manual_2120823011.webp)
2
In-line rectangular smoke exhaust fan series BK..
against contact with the impeller is provided.
INFORMATION / FAULT CAUSES
– If the thermal overload protection is triggered, this
could be the result of contamination, stiffness of
the impeller and/or bearings. The cause can also
be a winding temperature that is too high due to
insufficient motor cooling, or air flow temperatures
or ambient temperatures that are too high.
– Abnormal noises can be caused by worn out bea
rings.
– Vibrations can originate from an unbalanced or dir
ty impeller or due to the installation situation.
MAINTENANCE
ATTENTION: The unit must be fully isolated from
the mains power supply before any maintenance
and installation work.
Excessive deposits of dirt, dust, grease, etc. on the
impeller, motor, protection guard and, above all, bet
ween the casing and the impeller, are not permitted
and must be prevented by periodic cleaning. The
motorimpeller unit can swingout for inspection and
cleaning. All parts are freely accessible.
Insofar as the unit has an important technical supply
function, regular sixmonthly maintenance is required.
In cases of longer periods of standstill, maintenance
must be carried out when the unit is restarted.
Devices that are not in regular operation must be
operated for at least one hour every 3 months.
REPAIR WORK
Defective smoke exhaust fans must be completely
replaced. Customer repair attempts are not permis
sible under any circumstances.
The defective smoke exhaust fan must be fully re
turned to the Helios Ventilatoren factory!
Contact Helios customer service team.
The unit must be disposed of following smoke
extraction operation!
SOUND LEVELS
The sound levels stated in the catalogue can differ
considerably after installation as the sound pressu
re level depends on the absorption capacity of the
room, the installation situation and other factors.
Sound reduction is possible by using sound atte
nuators (available as accessories for certain types).
FAULTS
The thermal contacts/motor protection devices may
be triggered by:
– Heavy contamination, stiffness of the impeller and/
or ball bearing,
– air flow temperature too high,
– too little pressure loss in the duct network.
Abnormal noises
can be caused by
– incorrect direction of rotation,
– work out ball bearings.
Vibrations
can be caused by:
– an unbalanced or dirty impeller or the installation
situation.
Heavily reduced performance
can occur if:
– the actual duct and component resistances (grille,
dampers etc.) are higher than planned.
ACCESSORIES, SWITCH AND CONTROL ELE-
MENTS
The use of accessory parts, which are not recom
mended or offered by Helios, is not permitted. Pos
sible damage will not be covered by warranty.
WARRANTY
If the previous instructions are not observed, our war
ranty and goodwill treatment will cease to apply. The
same applies to derived liability claims against the
manufacturer.
CERTIFICATION
This unit series has been tested according to DIN EN
121013.
REGULATIONS / GUIDELINES
If the unit is installed correctly and used to its inten
ded purpose, it conforms to all applicable regulations
and CE guidelines.