Nordica TERMOSOVRANA DSA, Инструкция по установке, использованию и техническому обслуживанию

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TermoSovrana DSA
7094211 – EN
25
4.1. IN A EMERGENCY
If there is a fire in the flue connection :
a) Close the loading door and the ash drawer door
b) Close the comburent air registers
c) Use carbon dioxide ( CO2 powder ) extinguishers to put out the fire
d) Request the immediate intervention of the Fire Brigade
DO NOT PUT OUT THE FIRE WITH WATER.
When the flue stops burning, have it checked by a specialist to identify any cracks or permeable points.
5. FLUE
Essential requirements for correct appliance operation:
• the internal section must preferably be circular;
• the appliance must be thermally insulated and impermeable
and built with suitable materials which are resistant to heat,
combustion products and any condensation;
• there must be no narrowing and vertical passages with
deviations must not be greater than 45°;
• if already used, it must be clean;
• the technical data from the instruction manual must be
respected;
If the flues are of a square or rectangular section, the internal edges
must be rounded with a radius of not less than 20 mm. For the
rectangular section, the maximum ratio between the sides must be
≤
1.5.
A section which is too small causes a reduction in draught. A minimum
height of 4 m is advisable.
The following are
FORBIDDEN
and therefore jeopardise the correct
operation of the appliance: asbestos cement, galvanised steel, rough
and porous internal surfaces. Picture 5 shows some example solutions.
The minimum section must be 4 dm
2
(for example 20x20cm) for
appliances whose pipe dimensions are less than 200mm, or
6.25dm
2
(for example 25x25cm) for appliances with a diameter of
more than 200mm.
The draught created by your flue must be sufficient but not excessive.
A section of the flue which is too large can present a volume which is
too large to heat and therefore cause operating difficulties for the
Picture 4
Picture 5
(1) AISI 316 stainless steel flue with
double chamber insulated with
material resistant at 400°C.
100% efficiency - excellent.
(2) Fireproof flue with double insulated
chamber and external covering in
lightweight concrete.
100% efficiency - excellent.
(3) Traditional clay flue with square
section and air spaces.
80% efficiency - excellent.
(4) Avoid flues with an internal
rectangular section whose ratio is
different from the design.
Efficiency 40% - mediocre
.
A+1/2A
A
Max.
A+1/2A
(3)
(1) (2)
(4)
100
50
30 30
A B