The Flue - LA NORDICA MARIAROSA Manuel Utilisateur

The cooker is equipped with controls of primary and secondary air by which it is adjusted the combustion air.
1A - PRIMARY Air Register
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With the lower register, the passage of primary air in the lower part of the cooker is regulated through the ash drawer and the grill in the
direction of the fuel. The primary air is necessary for the combustion process. The ash drawer must be emptied regularly, so that the ash
cannot block the primary air intake for combustion. The primary air also keeps the flame alive.
The primary air register must be almost completely closed during wood combustion, as otherwise the wood burns too quickly and the stove
may overheat.
2A - sECONDARY Air Register
This register must be open (i.e. turned completely to the right), in particular for the combustion of wood (see Table).
The register regulation necessary in order to obtain nominal calorific output is the following (see Cap. TECHNICAL DATA):
Hourly consumption kg/h
B - FLUE gAs Control
(Picture
(Conversion from the stove Radiant-plate USe function to the stove HeAT ACCUMULATOR function)
On the right of the front of the stove, between the protection rail and the heat accumulator door, is the SMOKE CONTROL LEVER, recognisable
as a bronze knob. When the lever is pushed towards the back of the stove, the combustion gases flow above the oven directly towards the
exhaust stub (stove function – Radiant-plate USE); when the lever is pulled towards you, the combustion gases flow all around the heat
accumulator, so the internal temperature increases evenly (stove function – heat ACCUMULATOR USE).
To ignite the flame follow the instructions below (see Cap. IGNITION) :
• Open the FLUE GAS Register (stove function – Radiant-plate USE) to aid flue gas exhaust. Position the register (any butterfly valve placed
on the flue gas exhaust pipe must also be opened).
• Open the primary air register (placed on the ash tray).
• After having started the fire with small pieces of wood and waited until it is well lit.
• Bring the flue gas register to the heat ACCUMULATOR position.
• Close the any butterfly valve placed on the flue gas exhaust pipe must also be opened.
The control regulation during the ignition phase is the following:

THE 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
Picture 1
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).
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6).
6).
(Picture
PRIMARY air
Picture 6
6)
PRIMARY air
OPEN
shows some example solutions.
sECONDARY air
OPEN
sECONDARY air
OPEN
ENgLIsH
TERTIARY air
PRE-ADJUSTED
FLUE gAs Control
stove function – Radiant-plate USE