BOREAL ECO200 Instrucciones De Instalación, Uso Y Mantenimiento página 15

** For the fitter
The optimum draft for the stoves vary between 12+/-2 Pa (1.0–1.4 mm water column). We recommend checking the technical information of the
product.
A lower value causes a bad combustion causing carbonic deposits and excessive smoke generation, having leaks and, even worse, an increase of the
temperature that could damage the structural components of the stove, while a higher value leads to a too rapid combustion with the heat dispersion
through the flue.
Materials that are prohibited for the chimney and, therefore, damage the proper functioning of the equipment are: fibre cement, galvanized steel (at least
in the first few meters) and rough and porous interior surfaces
All stoves that send smoke to the exterior should have their own chimney.
Never use the same chimney for several equipments at the same time.
TThe minimum diameter must be 4 dm2 (for example, 20 x 20 cm) for
stoves with a diameter below 200 mm or 6.25 dm2 (for example, 25 x
25 cm) for equipments with a diameter higher than 200 mm.
A big section of the chimney (for example, diameter of the pipe superior to the one
recommended) may results in a volume too large to be heated and, therefore, it can
cause difficulties for the proper operation of the equipment. In order to avoid this
problem, it is necessary to enclose
the chimney in its entire length. However, a small section (for example, diameter of
the pipe inferior to the one recommended) may cause a reduction of the draft.
The flue must be away from flammable or combustible materials through an
appropriate insulation or an air chamber. In the case that they pass through
flammable materials compounds, they should be eliminated.
Inside, it is forbidden that there are pipes of installations or air abduction channels.
It is also prohibited to do mobile or fixed openings for connecting other different
equipments.
If we use metallic pipes inside a masonry duct, it is essential that they are well
insulated and with appropriate materials (insulating fibre coatings) in order to avoid
the deterioration of the masonry or the interior coating.
(1) In the case that there are chimneys placed side by side, one
of them must exceed to the other at least 50 cm in order to avoid
pressure movements among them
(1) Stainless steel AISI 316 chimney with double insulated
chamber and material resistant up to 400°C. Efficiency
100% optimum.
(2)Traditional clay chimney with square section and holes.
Efficiency 80% optimum.
(3) Chimney with refractory material and double insulated
chamber and exterior coating made of lightweight concrete.
Efficiency 100% optimum.
(4) Avoid chimneys with rectangular interior section different
to the one of the drawing. Efficiency 40% poor. Not
recommended.
(1) The chimney can't have obstacles around 10 m towards
walls or trees. Otherwise, raise it at least 1 m above the obstacle.
The chimney must exceed the top of the roof at least 1 m.
EN
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