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WARNING: We cannot be made liable for a wrong operation of the plant, when it does not comply with the
provisions of these instructions or when it uses additional products not suitable for this appliance.
(3) 10 mm
(1)
(2)
(3) 10÷50 mm
(1)
(3) 10 mm
(2)
5.
FLUE
Essential requirements for a correct operation of the appliance:
•
the internal section must be preferably circular;
•
be thermally insulated and water-proof and produced with materials suitable to resist to heat, combustion
products and possible condensates;
•
not be throttled and show a vertical arrangement with deviations not greater than 45° ;
•
if already used, it must be clean;
•
observe the technical data of the instructions manual;
Should the flues have a square or rectangular section, internal edges must be rounded with a radius not lower than 20
mm. For the rectangular section, the maximum ratio between the sides must be ≤ 1.5.
A too small section causes a decrease of the draught. It is suggested a minimum height of 4 m.
The following features are forbidden and therefore they endanger the good operation of the appliance: asbestos
cement, galvanized steel, rough and porous internal surfaces. Picture 4 gives some examples of execution.
(1)
(2)
A+1/2A
(3)
(4)
Max.
A+1/2A
1) Door for
cleaning
(1) Sportello
per
pulizia
18
(3) 10 mm
(1)
(3) 10 mm
(2)
(2)
(4)
(1)
(3) 10 mm
(2)
(2)
(1) AISI 316 steel flue with double chamber insulated with material resistant to 400° C.
Efficiency 100% excellent.
(2) Refractory flue with insulated double chamber and external coating in lightweight
concrete.
Efficiency 100% excellent.
(3)
Traditional
Efficiency 80% excellent.
(4) Avoid flues with rectangular internal section whose ratio differs from the drawing.
A
Efficiency 40% poor.
SI
YES
2)
Representatio
n of a correct
flue with air-
tight door for
the collection
and discharge
of solid
unburnt
materials.
Picture 5
(1)
(1) Beam;
(2) Refractory insulating material; ACCORDING TO
THE REGIONAL REGULATIONS
(1)
(3) Air pocket;
(4) Metallic protection.
(4)
clay
flue
showing
INSERTO 60 – 70 – 70 To – 70 Pr – 70 H49
a
square
section
Picture 3
with
cavities.
Picture 4
NO
1) The
connection of
more than one
appliance to
the flue is not
recommended
. Each
appliance
must have its
own flue.
Picture 6
6090710 – EN
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