13
2.
For the Installer
1
Kesselnenngesamtleistung ist die Summe der gleichzeitig betriebenen Nennleistungen aller installierten Wärmeerzeuger im selben Heiz-/Aufstellraum.
2.3 Combustion air
An adequate supply of combustion air is absolutely essential. The combustion air is drawn directly from the instal-
lation room by the device, therefore the installation room must be adequately ventilated. The combustion air should
be directed to the vicinity of the boiler and must be free from pollutants (gases, vapours, and dusts), otherwise
malfunctions and increased wear ( e.g., corrosion) may occur.
Attention!
The configuration of the entire system must comply with the requirements of regional legislation,
applicable regulations, standards and guidelines.
Applicable for Austria (excerpt from ÖNORM H 5170):
The minimum free cross-section area must be 5 cm
2
per kW of the boiler‘s nominal total output
1
.
The ventilation opening to the outdoors for combustion air should be designed as follows:
– the flow of air must not be restricted in any way by the weather (e.g., snow, leaves),
– the free cross-section area remains the same when taking the cover grille, discs, etc. into consideration.
Applicable for Germany (excerpt from the Firing Ordinance, September 2007):
For hearths with a total nominal output of no more than 50 kW that are dependent on surrounding air, the com-
bustion air supply will be sufficient providing that each installation room has an opening which vents to the atmos-
pher
e (with an unobstructed cross-section of at least 150 cm² or two openings of 75 cm² each, or pipes leading
outside with a technically equivalent cross-section).
Information!
Malfunctions or other issues caused by inadequate combustion air are not covered by the guarantee!
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