LA NORDICA MARLENA 5.0 Manuel Utilisateur page 27

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;
• all the sections of the flue gas duct must be accessible to inspection;
• inspection openings must be provided for cleaning.
• 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 materials are foRbidden and compromise the good operation of the appliance: asbestos cement, galvanised steel,
rough and porous internal surfaces.
FOR A CORRECT INSTALLATION PLEASE RESPECT THE SECTIONS/LENGTHS OF THE FLUE SHOWN IN THE
TECHNICAL DATA TABLE. BY INSTALLATIONS WITH DIFFERENT DIMENSIONS THE FLUE MUST BE SUITABLY
SIZED IN ACCORDANCE WITH EN13384-1.
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 appliance; to avoid this, it is necessary to intubate the appliance for its entire height. A section which is too small causes a
reduction in draught.
ATTENTION: 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 AT A
SUITABLY DISTANCE FROM FLAMMABLE OR COMBUSTIBLE MATERIAL USING SUITABLE INSULATION OR AN
AIR SPACE.
IT IS foRbidden TO PASS SYSTEM PIPING OR AIR DUCTS INSIDE THE FLUE. IT IS ALSO FORBIDDEN TO CREATE
MOVEABLE OR FIXED OPENINGS ON THE FLUE ITSELF, FOR THE CONNECTION OF FURTHER DIFFERENT
APPLIANCES (See Chapter CONNECTING A FIREPLACE OR OPEN HEARTH TO THE FLUE).
CHIMNEY POT
THE FLUE DRAUGHT DEPENDS ON THE SUITABILITY OF THE CHIMNEY POT.
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 2) .
As it must always go past the ridge of the roof, the chimney pot must ensure exhaust even in the presence of wind (Picture 3).
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 flue.
• Be built so as to prevent rain, snow or any foreign body entering the flue.
• Be easy to inspect, for any maintenance and cleaning operations.
CONNECTION TO THE CHIMNEY
Products with automatic door closing (type 1) must operate, for safety reasons, with the furnace door closed (except during the fuel
loading or ash removal phases).
Products with non-automatic door closing (type 2) must be connected to their own flue.
Operation with doors open is only allowed when supervised.
THE CONNECTION PIPE TO THE FLUE MUST BE AS SHORT AS POSSIBLE, STRAIGHT HORIzONTAL AND POSITIONED
SLIGHTLY IN ASCENT, AND WATERTIGHT.
CONNECTION MUST BE CARRIED OUT WITH STABLE AND ROBUST PIPES,COMPLY WITH ALL CURRENT STANDARDS AND
REGULATIONS AND TO THOSE ENVISIONED BY THE LAW, AND BE HERMETICALLY SECURED TO THE FLUE.
The internal diameter of the connection pipe must correspond to the external diameter of the appliance flue gas exhaust stub pipe
(DIN 1298).
ATTENTION: 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.
MINIMUM DISTANCE SAFETY 25 CM.
The chimney pressure (DRAUGHT) must be at least - Pascal (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 (butterfly valve) on the exhaust pipe or in the chimney, according to the regulations in force.
Picture 1 shows some example solutions.
ENGLISH 27