INSERTO Crystal
50 – 50v – 50v p30 – 70 – 80 – 100
6096801 – EN
19
4.2. BEAM PROTECTIONS
Considering the irradiation of the hearth, it is necessary
to be particularly careful in protecting the beams while
designing your stack. Consider the proximity of beams to
the external surfaces of the hearth, on one side, and the
irradiation of the glass door, usually very close to the
beams, on the other side. In any case, it has to be
considered that the internal or lower surfaces of this
beam in flammable material must not come in contact
with temperatures higher than 65 °C.
Picture 4 gives some examples of execution.
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.
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 5 gives some examples of execution.
Picture 4
Picture 5
Picture 6
Picture 7
(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 clay flue showing a square section with cavities.
Efficiency 80% excellent.
(4) Avoid flues with rectangular internal section whose ratio differs from the drawing.
Efficiency 40% poor
.
A+1/2A
A
Max.
A+1/2A
(3)
(1)
(2)
(4)
(1) Beam; (2) Refractory insulating material
ACCORDING
TO
THE
REGIONAL
REGULATIONS;
(3) Air pocket; (4) Metallic protection.
(1)
(1)
(4)
(2)
(2)
(3) 10 mm
(3) 10 mm
(1)
(3) 10 mm
(2)
(1)
(2)
(3) 10÷50 mm
(1)
(3) 10 mm
(2)
(4)
(1)
(3) 10 mm
(2)
(1) Sportello
per
pulizia
SI
1) Door for
cleaning
YES
2)
Representation
of a correct
flue with air-
tight door for
the collection
and discharge
of solid
unburnt
materials.
NO
1) The
connection
of more than
one
appliance to
the flue is
not
recommende
d. Each
appliance
must have its
own flue.
