Bedienungsanleitung La Nordica MONOBLOCCO 90PA 2.0 (Seite 26 von 100) (Deutsch, Englisch, Französisch, Italienisch, Spanisch)

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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).





THEREFORE, IF IT IS HANDICRAFT CONSTRUCTED, THE OUTPUT SECTION MUST BE MORE THAN TWICE AS BIG AS THE INTERNAL SECTION

OF THE FLUE (Picture 5).

Should it be necessary to exceed the ridge of the roof, the chimney cap must assure the discharge also in case of windy weather (Picture 6).

The chimney cap must meet the following requirements:

• have internal section equivalent to that of the stack.

• have a useful output section twice as big as the ue internal one.

• be manufactured in such a way as to prevent the penetration of rain, snow, and any other foreign body in the ue.

• be easily checkable, for any possible maintenance and cleaning operation



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).

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La Nordica MONOBLOCCO 90PA 2.0 Seite 26

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