Green Stoves 25KW Manual de instrucciones de instalación y funcionamiento - Página 7
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Chimney
In order for the stove to perform satisfactorily the chimney height must be sufficient to
ensure an adequate draught of between 12 Pa and 25 Pa so as to clear the products of
combustion and prevent smoke problems into the room.
NOTE: A chimney height of not less than 4.5 metres measured vertically from the outlet
of the stove to the top of the chimney should be satisfactory. Alternatively the calculation
procedure given in EN 13384-1 may be used as the basis for deciding whether a
particular chimney design will provide sufficient draught.
The outlet from the chimney should be above the roof of the building in accordance with
the provisions of Building Regulations Approved Document J.
If installation is into an existing chimney then it must be sound and have no cracks or
other faults which might allow fumes into the house. Older properties, especially, may
have chimney faults or the cross section may be too large i.e. more than 230 mm x 230
mm. Remedial action should be taken, if required, seeking expert advice, if necessary. If
it is found necessary to line the chimney then a flue liner suitable for solid fuel must be
used in accordance with Building Regulations Approved Document J.
Any existing chimney must be clear of obstruction and have been swept clean
immediately before installation of the stove. If the stove is fitted in place of an open fire
then the chimney should be swept one month after installation to clear any soot falls
which may have occurred due to the difference in combustion between the stove and the
open fire.
If there is no existing chimney then any new system must be to the designation described
above and in accordance with Building Regulations Approved Document J.
A single wall metal fluepipe is suitable for connecting the stove to the chimney but is not
suitable for use as the complete chimney. The chimney and connecting fluepipe must
have a minimum diameter of 150 mm and its dimension should at no point be less than
the size of the outlet socket of the stove.
Any bend in the chimney or connecting fluepipe should not exceed 45. 90 bends should
not be used.
Combustible material should not be located where the heat dissipating through the walls
of fireplaces or flues could ignite it. Therefore when installing the stove in the presence
of combustible materials due account must be taken of the guidance on the separation of
combustible material given in Building Regulations Approved Document J and also in
these stove instructions.
If it is found that there is excessive draught in the chimney then a draught stabiliser
should be fitted.