Personnel Qualification; Protection Against Contact; Motor Protection; Information On Duct Systems For Ventilation Systems With Common Extract Air Ducts - Helios Ultra Silence ELS EC series Montage- Und Betriebsvorschrift

Installation and Operating Instructions
CHAPTER 2
GENERAL OPERATING
INSTRUCTIONS
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DANGER
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NOTE
Fan unit ELS EC..
2.0

Personnel qualification

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The electrical connection and commissioning as well as the installation, servicing and maintenance of the
fan must only be carried out by qualified electricians.
ELS EC.. complete units can be used by children over the age of 8 as well as persons with physical, sensory, or mental
disabilities or lack of experience and knowledge, if they are supervised or instructed with regard to the safe use of the
unit and they understand the resulting risks. Children must not play with the unit. Cleaning or user maintenance must
not be carried out by unsupervised children.
2.1

Protection against contact

– ELS fan units with inner facades are delivered with intake-side protection guards as standard. Depending on the
installation conditions, protection against contact may be necessary on the discharge side. Corresponding protecti-
on guards are available as accessories.
– Fans which are protected by their installation method (e.g. installation in ventilation ducts or closed assemblies) do
not require protection guards if the plant provides the necessary level of safety. Please note that the operator is
responsible for complying with the current standard and can be held liable for accidents as a consequence of mis-
sing protection systems.
2.2

Motor protection

The units have an energy-efficient, maintenance-free EC motor (interference-free, ball bearing) with the highest level of
efficiency, stall protection and electronic restart.
2.3

Information on duct systems for ventilation systems with common extract air ducts

The ventilation system must be designed according to DIN 18017, pt. 3. The extract air lines consist of the connec-
ting lines for the fans and the common extract air line (main line). The line section above the highest unit connection is
described as the discharge line and must be vented via the roof.
Extract air lines must be leak-proof, stable and made from fireproof material class A according to DIN 4102 for more
than two full floors. They must be provided or thermally insulated so that no condensation damage occurs. A sufficient
number of cleaning openings with leak-proof closures must be positioned so that the extract air lines can be cleaned
easily. Screwable cleaning openings are not permitted.
The main line should be straight and vertical with a constant cross-section. In case the main line is not vertical, it
must be mathematically verified that the requirements according to DIN 18017, pt.3, section 3.1.3 are fulfilled. When
measuring the main line, it is required that all fans are simultaneously operated at full output. Throttle devices are not
permitted.
The diameter of the main line can be determined from the dimensioning diagram (Helios main catalo-
gue). In this respect, it should be noted that there are increased pressure losses for a discharge line length over
1.5 m and a floor height over 2.75 m, which must be compensated for with a larger main line cross-section.
The Helios ELS software can be used for dimensioning.
Available via the Helios website: www.heliosventilatoren.de.
Maximum three ELS fan units per floor can be connected to a common main line. The ventilation of other rooms in an
apartment must not take place via the same fan that is used to ventilate the bathroom and toilet. Observe minimum
bending radius of connecting lines R = DN.
Design and installation of ventilation system must comply with the building acoustics regulations (DIN 4109 sound
insulation in building construction).
2.4

Supply air duct

Each room to be ventilated must have a non-closable air vent opening of 150 cm² free cross-section.
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