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A chimney with a proper chimney draft is the main factor determining the correct operation of the boiler.
This has a significant impact on the power and efficiency of the system. The boiler can be connected to a
chimney with sufficient chimney draft – see technical data.
In order to make calculations, use the exhaust mass flow at the total rated heat output. The effective
length of the chimney is calculated from the point of entry of exhaust gases to the chimney.
Install the flue gas outlet with inspection opening for cleaning.
Mount the exhaust pipe to the chimney with a 5 mm rivet or screw, using the existing holes. The
exhaust pipe should be as short as possible and should be elevated upwards from the boiler to the
chimney.
Connect the flue to the chimney with the boiler connection (figure 3, item 32)
made of 3 mm sheet metal. Place it onto the flue outlet, embed inside
the chimney and seal.
Exhaust pipe, mounted only to the chimney and placed onto the exhaust connection pipe, should
be mounted very carefully to prevent sliding out.
Pipes longer than 2 m should be additionally fastened. All parts of the exhaust pipe must be made
of non-combustible materials.
TIP Chimneys made of steel pipes should be higher by 15-20% than brick chimneys.
INFO: Due to the low temperature of exhaust gases at the rated thermal output, the boiler can emit wet
fumes, lead to the deposition of soot, and cause insufficient chimney draft. This can lead to moisture and
corrosion of brick chimneys.
It is recommended to use a chimney liner:
– in the case of modernization of the existing chimney ducts and adapting them to year-round
operation of the boiler, it is recommended to use one-sided or double-sided (depending on the
place of installation) exhaust system made of stainless steel (acid- and heat-resistant),
– in newly-constructed buildings and in the case of year-round operation of the boiler, it is
recommended to use a ceramic exhaust system resistant to condensate, thermally insulated, with
ventilation and condensate discharge.
The boiler room should comply with the requirements of PN-87 B-02411 on solid fuel central heating
boilers.
The boiler room should be protected against the ingress of ground water and should be equipped with
adequate ventilation to ensure free inflow of combustion air, including:
– ventilation duct (a hole in the window or wall without shutters) with a cross-section not less
than 200 cm2,
– ventilation duct placed, if possible, near the chimney with an inlet hole (without shutters) under
the ceiling with a cross-section not less than 140 x 140 mm.
5.6.2. Inlet air connection
DANGER: Lethal danger caused by a deficiency of oxygen in the boiler installation room!
Ensure the supply of a sufficient amount of air through the openings leading to the outside.
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