Technical Description; Flue - LA NORDICA Brigitta Benutzerhandbuch

TECHNICAL DESCRIPTION

The chimney stoves of La Nordica are suitable to heat living spaces for some periods. As fuel, wood logs are used. The appliance
works as an intermittent operating appliance.
The stove is made of raw and enamelled meltings of cast iron.
The hearth is totally sheathed with single cast-iron sheets. Its back is extractable. Thanks to calibrated holes, made on the same
back, it is guaranteed a supply of pre-heated air inside the hearth, thus obtaining a post-combustion which increases the efficiency
and reduces the emission of the unburnt gases. Inside it there is a turning and extractable grate. The inside smoke plate, reflects the
fire radiation and increases the internal temperature of the combustion chamber. This process together with the exhaust gases flows,
makes optimal the combustion and improves the efficiency (see
The hearth is equipped with a panoramic door with ceramic glass (resistant up to 700 °C). This allows a wonderful view on the burning
flames. Furthermore, it is thus avoided the output of sparks and smoke.
Below the hearth door will be found an extractable ash-drawer with a closing door
The heating of the environment is made by irradiation: through the panoramic glass and the external hot surfaces of the stove,
the heat is radiated into the environment See chapter CALCULATION OF THE THERMAL POWER).
ACCESSORIES
The stove is equipped with controls of primary and secondary air by which it is adjusted the combustion air.
1A - PRIMARY air register
With the air register located under the door of the hearth, it is possible to adjust the air flow through the ash drawer and the grating
in direction of the fuel. The primary air is necessary for the combustion process during the ignition. In order to open the passage
of primary air the lever should be completely pulled. The ash drawer has to be emptied regularly, so that ash cannot hinder the
intake of primary air for the combustion. Primary air is also necessary to keep fire live. When the control is completely on the left,
the register is closed, when the knob is completely on the right the register is opened. During the combustion of wood, the primary
air register must be opened only a few, since otherwise the wood burns quickly and the device can overheat (see chapter NORMAL
OPERATION).
2A - SECONDARY air register
Over the hearth door there is the secondary air register. Also this control must be opened (then moved to the right), especially for
wood combustion, so that unburnt carbon does not undergo a post-combustion (see chapter NORMAL OPERATION).
The adjustment of the registers necessary to reach the rated calorific yield is the following one:
Hourly wood consumption in kg / h
CANDY
BRIGITTA

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 materials are FORBIDDEN and compromise the good operation of the appliance: asbestos cement, galvanised steel,
rough and porous internal surfaces.
The minimum section must be 4 dm
or 6.25 dm (for example 25x25 cm) for appliances with a diameter of more than 200 mm.
2
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).
22
POKER
SERIES
(Picture 6 )
(Picture 6 )
2
1,7
Picture 1 shows some example solutions.
(for example 20x20 cm) for appliances whose pipe dimensions are less than 200 mm,
2
Picture 9 ).
(Picture 8
GLOVE
SERIES
PRIMARY air
Picture 6 pos. 1
1/4 OPEN
ENgLIsH
- B).
SECONDARY air TERTIARY AIR
Picture 6 pos. 3 PRE-ADJUSTED
OPEN PRE-ADJUSTED