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Installation and Operating Instructions
NOTE
Fan unit ELS NFC..
2.4 Storage
When storing for a prolonged time, the following steps are to be taken to avoid
damaging influences: When storing for a prolonged time, the following steps are
to be taken to avoid damaging influences: Protection of packaged ELS NFC.. by
dry, airtight and dust-proof packaging (plastic bag with desiccant and humidity
indicators). Vibration-free, water-tight and constant-temperature storage at a
temperature in the range -20 °C to +40 °C.
2.5 Protection against contact
– ELS fan units with inner facades are delivered with intake-side protection
guards as standard. Please note that the operator is responsible for complying
with the current standard and can be held liable for accidents as a conse-
quence of missing protection systems.
2.6 Motor protection
The units have an energy-efficient, maintenance-free EC motor (interferen-
ce-free, maintenance-free ball bearing) with the highest level of efficiency, stall
protection and electronic restart.
2.7 Information on duct systems for ventilation systems with common ext-
ract air ducts
The ventilation system must be designed according to DIN 18017, pt. 3. The
extract air lines consist of the connecting 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 posi-
tioned 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 dia-
gram (Helios main catalogue). 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).
2.8 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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