Servicing
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11. Flue Gas Ducting
According to the means of flue gas removal and combustion air inlet the boiler version is classified as C. this
means a close appliance that takes the combustion air from the outside space or from a joint shaft and from
which the flue gases are removed into the outside space or to a joint shaft. The shaft is represented by a
structural part of the building, e.g., a chimney, a duct, etc. The combustion area and the flue gas ducts of the
appliance are separated in a gas-tight way from the area in which the appliance is located.
In the standard version the boiler is supplied with an air flange. The boiler flue gas exhaust is not a part of
the boiler delivery. It is necessary to maintain a 3 % inclination to the boiler. The pressure loss for the flue
gas exhaust shall not exceed 150 Pa. The total pressure loss is the sum total of individual losses of the parts
described in this chapter.
The boiler shall only be installed together with wind protective equipment which meets the requirements of
EN 1856-1 (See Annex N). For removal of flue gases through the roof it is necessary to use a concentric
chimney piece.
The boiler shall be installed together with the necessary accessories (pipeline for the combustion air supply
and flue gas exhaust).
The approved and recommended flue ducting versions for the NAOS K4 boiler made by ALMEVA are as
follows:
•
Star D80mm
•
Flex D80 mm
•
LIK 60/100 mm
•
LIK 80/125 mm
The recommended flue ducting can be ordered together with the boiler.
Fig. no. 22
Flue gas removal and air supply connection options
