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www.hlu.eu
06.2019
Installation inside the explosion-hazarded area:
Installation inside the explosion-hazarded area is not permissible,
unless the fan is provided explicitly for this purpose (see type label
Chapter 4.2).
If the fan for an installation with an open inlet or outlet or is provided
for an inlet-side duct connection as part of a larger installation, the
operator is obligated to prevent the penetration of foreign bodies that
can cause ignition according to DIN EN 14 986, point 4.22.
Repair and maintenance works of explosion-proof fans may only be
performed by qualied persons in the explosion protection by
using original spare parts.
If the fan has an open inlet and / or outlet (Type A, B, C according to
ISO 13349), the fan must have the same category inside and outside.
Types of connection
Residual risks
Although the fans have been constructed according to the newest
technology as well as to the security rules and they are monitored by
quality assurance (QA) system, there remains a residual risk due to
the possible rupture of the impeller. This happens especially, when
the conditions of use have not been complied. Therefore it is neces-
sary to pay attention on technically perfect conditions and on the right
case of application. The environment of the fans has to be secured
in such a way, that in case of a damage, neither persons nor objects
get harmed.
These assemblies are intended exclusively for the above purpose.
Using the assemblies for dierent purposes than described above,
or modifying them without written consent of the manufacturer are
considered as non-compliant with the intended application. The ma-
nufacturer cannot be held responsible for damage resulting from such
use. The risk is borne exclusively by the user. The fan may be started
only after checking that all safety devices are operable and that the
system in which this fan is installed complies with the EU directives.
The correct use for the intended application also implies compliance with the instructions given
in the manufacturer operating manual and with the conditions for maintenance and repair.
The plastic fans are not covered by the „Regulation No 327/2011 of the European Commission
about the implementation of Directive 2009/125/EC (ErP Directive)“ because they are intended
for the extraction of highly corrosive media.
Operating manual
Centrifugal fans
HF R | RV | MRV
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