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CHAP.07 POSITIONING AND CONNECTIONS FOR THE INSTALLER
07.1
FLUE OR FUME EXHAUST SYSTEM
The flue or fume exhaust system is a fundamental element for the proper functioning of the stove and must comply with the following
general standards:
EN1856-1
Chimneys. Requirements for metal chimneys - Part 1: System chimney products
EN1856-2
Chimneys. Requirements for metal chimneys - Part 2: Metal flue liners and connecting flue pipes
UNI 10683
Heat generators operating with wood or other solid bio fuels - Installation requirements
It is advisable that the project the fireplace is managed by a designer on the basis of a dimensional calculation of the chimney section
and of both ducting and insulating sizing (UNI
appliances. The dimensions of the flue are strictly proportioned to its height, to be measured from the fireplace to the bottom of the
chimney cap. To guarantee a correct smoke exhaust, the surface of the chimney terminal opening must double the chimney flue section
and it does not have to be blocked by wire nets or other obstacles.
The exhaust duct of the combustion products generated by the appliance must respond to the following requirements:
•
all changes in direction must be open to inspection to facilitate maintenance.
•
correct draught to maintain depression in the combustion chamber, as per the technical specifications, must be guaranteed.
•
it must be watertight, waterproof and suitably isolated and insulated.
•
must be made of suitable materials that resist normal mechanical stress, heat, the action of the combustion products and acid
condensations.
•
must be prevailingly vertical structures with deviations from the axis not greater that 45°.
•
must be adequately distanced from combustible or inflammable materials via an air space or suitable insulation.
•
must have an internal section which is preferably circular: square or rectangular sections must have rounded corners with a
radius of no less than 20 mm.
•
must have an internal section that is constant, free and independent.
•
rectangular sections shall have a maximum ratio of 1.5 between sides.
18
13384). Each appliance must have its own chimney flue without any inlets from other
It is recommended to use a windproof airfoil chimney cap.
If the flue is installed externally it must be insulated to prevent
the cooling of fumes and formation of condensation. The same
is valid for the tract from the roof to the chimney cap (Torrino).
The use of pipes in fibre cement for connecting the equipment
to the flue is forbidden.
Exhaust pipes must not run through rooms where the installation
of combustion equipment is forbidden. The assembly of the flue
chimney connection has to be done in order to guarantee that
smokes doesn't escape in all different working conditions, to
avoid the creation of condensation and the related smoke return
to the product..
Horizontal tracts in assembly must be avoided.
The chimney system for the smoke exhaust MUST be
dimensioned and projected by a Qualified Engineer.
He will determine the proper smoke exhaust system
taking into consideration the product technical data,
kind of installation, installation location and mostly the
installation technical regulation in force. The Engineer
will give indications to the installer about the materials to
use, smoke path section, insulation thickness, corrosion
resistance and all requirements needed for the correct
working of the system product-chimney.
The correct dimension of the air intake for ventilation and
aeration of the installation location MUST be verified in
conformity with the technical regulation in force.
Malfunctioning of the product caused by a smoke exhaust
not properly projected and dimensioned WILL NOT be
object of objections to Jolly-Mec and interventions at Jolly
Mec charge.
For appliance that must reach exhaust outlets that are not
coaxial with regard to the issue of the fumes from the machine,
changes in direction must be made using an open elbow of 45°
(F
. 1).
ig
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