First-Aid Measures; Flue - Nordica STELLA Instructions Pour L'installation, L'utilisation Et L'entretien

STELLA

6.1. FIRST-AID MEASURES

Should any fire arise in the stack or in the flue:
a) Close the feeding door and the ash drawer door .
b) Close the controls of combustion air
c) Extinguish the fire using carbon dioxide fire-fighting means (CO
d) Seek immediate intervention of FIRE BRIGADE .
DO NOT EXTINGUISH FIRE USING WATER JETS.
When the fire has been extinguished, let the flue check by an expert to find possible cracks and permeable
points.

7. FLUE

Essential requirements for a correct operation of the
appliance:
•
the internal section must be preferably circular;
•
be thermally
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 3 gives some examples of execution.
The minimum section must be 4 dm
20 cm) for appliances whose duct diameter is lower than 200 mm, or 6.25 dm
cm) for appliances with diameter greater than 200 mm.
The draught created by the flue must be sufficient, but not excessive.
A too big flue section can feature a too big volume to be heated and consequently cause difficulties in the
operation of the appliance; to avoid this, tube the flue along its whole height. A too small section causes a
decrease of the draught.
The flue must be properly spaced from any flammable materials or fuels through a proper
insulation or an air cavity.
It is forbidden to let plant piping or air feeding channels pass in the same flue. Moreover, it is forbidden to
create movable or fixed openings on the same for the connection of further other appliances.
1192000 Rev.03 – EN
insulated and water-proof
2
(for example 20 x
dust).
2
(1)
and
(3)
(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
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
(2)
(4)
A+1/2A
Max.
A+1/2A
A
and external coating
.
Picture 3
2
(for example 25 x 25
in
27