Installation instruction for radial blowers for areas subject to gas and dust explosion hazards
07/2019 KARL KLEIN Ventilatorenbau GmbH
Page 11
GB
Instruction!
The blower may only be placed into operation when in impeccable overall condition,
only with an undamaged housing and impeller wheel, and only with a fully operational,
safe electrical hook-up. Operating a defective machine is a danger to life and limb.
Easily ingested materials, such Styrofoam, fabric rags, or similar may not be located in
the vicinity of the intake. Care must be taken that sufficient clearance is provided to the
intake.
Take note of the air exhaust direction and area. The fragments from an impeller wheel
failure must be prevented from damaging the downstream equipment to be cooled.
The electrical installation must correspond to the requirements of the machine into
which the blowers are to be installed (i.e. motor cut-off switch).
The personnel must be familiar with all steps described in this Installation instruction that
relate to the proper operation and use of this equipment.
In areas with dust build-up and dust load in the environment; the dust deposits must be
held low enough to prevent the dust smoldering temperature from being reached;
Explosion-protected blowers may not be repaired by the customer. To maintain the
explosion protection, blowers may only be repaired or maintained for preventive
purposes by the manufacturer.
To avoid combustion hazards from dust deposits, cleaning intervals must be rigorously
complied with. The cleaning operation must be performed with diligence.
The dust buildup must not exceed a thickness of 5mm.
3.2. Emissions
3.1.1 Dust
The incidence of hazardous emissions is dependent on the various media to be conveyed
3.1.2 Noise
The noise profile depends on the installation type, on the environmental conditions and the
respective operating load on the blower.
The operating noise levels of the blower can reach high levels for certain installation types
and usages. The values can range from 60 to 110 dB (A). Detailed acoustic pressure levels
can be found in the KLEIN catalog.
If work must be performed in the vicinity, appropriate noise protection steps must be taken
by the operating entity as part of its duties in accordance with the Operational Safety
Directive [BetrSichV or equivalent other national regulations], for instance hearing protection.
3.1.3 Vibrations
KLEIN blowers are designed to such a high balance quality grade that no dangerous
vibrations will occur.
The vibrations resulting from the unavoidable residual imbalance can be reduced by
installing the equipment with vibration dampers, thus preventing the vibration from being
transferred to other components.
