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La Nordica INSERTO 80 HIGH PRESSURE Manual

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ENGLISH
FLUE
ESSENTIAL REQUIREMENTS FOR A CORRECT OPERATION OF THE DEVICE:
• the internal section must be preferably circular;
  

• not be throttled and show a vertical arrangement with deviations not greater than 45°;
• if already used, it must be clean;
• all the sections of the ue gas duct must be accessible to inspection;
• inspection openings must be provided for cleaning.
• 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 device: asbestos cement, galvanized steel,
rough and porous internal surfaces. In Picture 3 gives some examples of execution.



THE DRAUGHT CREATED BY THE FLUE MUST BE SUFFICIENT, BUT NOT EXCESSIVE.
A too big ue section can feature a too big volume to be heated and consequently cause diculties in the operation of the device; to avoid
this, tube the ue along its whole height. A too small section causes a decrease of the draught.
: AS FAR AS CONCERN THE REALISATION OF THE FLUE CONNECTION AND FLAMMABLE MATERIALS PLEASE
FOLLOW THE REQUIREMENTS PROVIDED BY UNI 10683 STANDARD. 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 DEVICES (Picture 4).


IT IS THEREFORE ESSENTIAL THAT, IF BUILT IN A HANDCRAFTED WAY, THE EXIT SECTION IS MORE THAN TWICE THE INTERNAL SECTION
OF THE FLUE (Picture 5) .
As it must always go past the ridge of the roof, the chimney pot must ensure exhaust even in the presence of wind (Picture 6).
The chimney pot must meet the following requirements:
• Have an internal section equivalent to that of the chimney.
• Have a useful exit section of double the internal section of the ue.
• Be built so as to prevent rain, snow or any foreign body entering the ue.
• Be easy to inspect, for any maintenance and cleaning operations.

THE CONNECTION TO THE STACK MUST BE PERFORMED WITH STIFF PIPES IN STEEL COMPLY WITH ALL CURRENT STANDARDS AND
REGULATIONS AND TO THOSE ENVISIONED BY THE LAW.

.
THE EXHAUST PIPE MUST BE AIRTIGHT FASTENED TO THE STACK AND CAN HAVE A MAXIMUM INCLINATION OF 45°; THIS TO AVOID
EXCESSIVE DEPOSITS OF CONDENSATE PRODUCED IN THE INITIAL STARTUP PHASES AND/OR THE EXCESSIVE GRIPPING OF SOOT AND
MOREOVER IT AVOIDS THE SLOWING DOWN OF THE SMOKES AT OUTPUT.
THE FAILED TIGHTNESS OF THE CONNECTION CAN CAUSE THE MALFUNCTION OF THE DEVICE.
The internal diameter of the connection pipe must be equal to the external diameter of the smokes stub pipe of the device. This is assured
by the pipes complying with DIN 1298.
(see chap. TECHNICAL DATA SHEET) .The measurement has always to be carried out
with hot device (rated thermal performance).
When the depression exceeds 17 Pa (=1.7 mm of column of water), it is necessary to reduce the same by installing an additional draught
regulator (buttery valve).
29
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