36
D36
(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
Never use the same chimney for several equipments at the
same time.
The minimum diameter must be 4 dm2 (for example, 20 x 20 cm) for inserts
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) 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.
D40
(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
D39
4.1
CONNECTION OF THE INSERT TO THE CHIMNEY
The connection to the insert for the smoke evacuation must be done with rigid aluminized steel pipes or stainless steel pipes.
It is forbidden the use of flexible metallic pipes or fibre cement pipes because they damage the safety of the connection because they
are subject to jerks and breaks, which causes smoke looses.
The chimney must be fixed hermetical to the smoke outlet of the insert. It should be rectilinear and with a material that supports high
temperatures (minimum 300ºC). It can have a maximum inclination of 45° whereby excessive deposits of condensation produced in the initial
stages of ignition and / or excessive soot formation is avoided. Moreover, it avoids the slowing down of the smoke when it comes out.
D37
D38
INSTALLATION, OPERATING AND SERVICING INSTRUCTIONS
INSERTS
EN
Summary of Contents for BRISTOL
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