4
Figure 8- Fresh air supply to the room with the boiler
SMOKE DISCHARGE SYSTEM
The smoke discharge must be executed in accordance with the existing standards. Do not connect the flue gas pipe to the
chimney to which the other furnaces have been connected (Figure 3). The flue gas pipe must not end in closed and/or semi-
open spaces, for example, garages, narrow passages, corridors, driveways, etc. After connecting the boiler to the chimney, the
authorized chimney sweep should check if there are any damages in the connection and if the connection has been properly
sealed. If the chimney is not suitable, it must be made in accordance with the requirements stated above (point 3.1).
Figure 3
The flue pipe must be made in compliance with applicable regulations. (Grounding is prescribed by the law.) This
grounding must be independent of the heating device.
When it comes to dimensions and materials, the flue pipe must meet the SRPS 9615-9731, SRPS 10683 - EN1856-1
standards.
Poorly maintained flue pipes or flue pipes made of unsuitable materials (asbestos, galvanized sheet metal, porous materials)
do not comply with the applicable regulations and adversely affect the operation of the boiler .
Flue gases can be discharged via a conventional chimney (see figure below) if the following conditions are met:
Make sure that the chimney is maintained. For proper maintenance and /or renovation of the chimney, contact
the qualified chimney sweep.
Flue gases can be discharged directly into the chimney only if it has a cap for the purposes of inspection and
cleaning and if its cross section is up to 20 x 20 cm, i.e. if its diameter is up to 20 cm.
If the chimney is larger, it is to be fitted with a properly insulated stainless steel pipe (of appropriate diameter).
Make sure that the chimney connection is properly sealed.
Avoid contact with combustible materials (embers) and in any case install fire resistant insulation.
When connecting the pellet boiler to the chimney using connecting elements, it is mandatory to install knees with an
opening for cleaning (Figure 4). If you use knees with an opening for cleaning, this will allow regular cleaning, and you will not
have to disassembly the pipe. The flue gases in the chimney connection are kept under mild pressure, so it is necessary to
check that the cap used for cleaning ash is perfectly sealed and if it remains perfectly sealed after each cleaning. Make sure
that everything is returned in its place and that the seals are in the right position.
Figure 4: Elements for cleaning
The installation of the flue pipes should be performed so that their narrow connecting part is always turned upwards
(Figure 5).
We recommend avoiding using long horizontal extensions to the chimney. If this is necessary, ensure that the pipe is
not counter leaned but that it has an inclination of at least 5% (Figure 6). The horizontal extensions must never be longer than 2
m.
It is not recommendable to connect the boiler directly to the chimney with a horizontal pipe longer than 1 m.
