Technical Description; Flue - LA NORDICA VIOLETTA Instructions Pour L'installation, L'utilisation Et L'entretien

5. TECHNICAL DESCRIPTION

Definition: product according to EN 13240. The appliance works as an intermittent operating appliance.
The chimney stoves of La Nordica are suitable to heat living spaces for some periods or to support an insufficient centralized heating
system. They are ideal for holiday apartments and weekend houses or as an auxiliary heating system during the whole year. As fuel, it is
possible to use wood logs. The chimney stove is made of raw and enamelled meltings of cast iron.
The hearth is internally sheathed with single sheets in cast iron and inside it there is a turning and extractable grate. The model GIULIETTA
- VIOLETTA is provided with an internal side of the hearth, which is extractable and pierced. Thanks to the calibrated holes of that side,
a contribution of pre-heated air inside the hearth is guaranteed, obtaining a post-combustion, which increases the yield and reduces the
exhaust gases emissions.
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 and avoids any possible output of sparks and smoke.
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. The device is equipped with registers of primary and secondary air by which it is adjusted the combustion air.
PRIMARY Air register (B Picture 6 at page
With the thermostat (ISETTA 07, ISOTTA 07, VIOLA) or valve (GIULIETTA, VIOLETTA) placed on the back of the right side of the
stove, it is adjusted the passage of air through the ash drawer and the grate in the fuel direction. The primary air is necessary for the
combustion process. The ash drawer must be regularly emptied, so that the ash does not obstruct the primary air entry. Through the
primary air the fire is also kept alive.
During wood combustion, the register of primary air must be opened only for a while, because otherwise the wood burns fast and the
stove may overheat. For the correct arrangement (see paragraph NORMAL OPERATION).
SECONDARY Air register (A
Over the door of the hearth there is the secondary air control.
This regulator must be open (the lever must be moved to the right), especially for wood combustion, so that unburnt carbon undergoes
a post-combustion (see chapter NORMAL OPERATION).
Through this register it is possible to adjust the power of the stove. Leaving it slightly open, according to the flue of the chimney, it is
possible to keep the glass clean.
IGNITION CONTROL (C Picture 6 at page
Close - ; Open +
See chapter LIGHTING.
LOAD THE FUEL:
Before opening the hearth door, open the ignition control (C), load the fuel, close the door and after about 5 or 10 minutes close the
control (C). IMPORTANT: we suggest you to open the door very slowly, to avoid the exit of smokes.
OPERATION with wood :
Open the secondary air register (A), primary air register (B), open the ignition control (C), light up the fire.
After about 10 minutes, when the fire is lighted, close the thermostat (B) and the ignition control (C) and adjust the combustion course
with the controls (A). The openings for air (primary and secondary) must be opened together just a little (you must open the eventual
butterfly valve placed on the pipe of smokes exhaust).
The adjustment of the registers necessary to reach the rated calorific yield is the following one:
GIULIETTA
ISETTA-07
ISOTTA-07
ISOTTA FORNO
VIOLA
VIOLETTA

6. 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
dm (for example 25x25 cm) for appliances with a diameter of more than 200 mm.
2
16
VIOLETTA / GIULIETTA / ISETTA 07 / ISOTTA EVO / VIOLA / ISOTTA FORNO
41)
Picture 6 at page 41)
41)
SECONDARY Air (A)
Mass of fuel hourly
1.8 kg/h
2.1 kg/h
2.5 kg/h
3.2 kg/h
2.1 kg/h
1.8 kg/h
Picture 1 at page 38 shows some example solutions.
(for example 20x20 cm) for appliances whose pipe dimensions are less than 200 mm, or 6.25
2
PRIMARY Air (B)
OPEN CLOSED
OPEN OPEN 5 mm
OPEN OPEN 5 mm
OPEN OPEN 5 mm
OPEN OPEN
OPEN OPEN
TERTIARY Air
Pre-calibrated
/
/
/
/
Pre-calibrated
1195300 - IT - EN - DE - FR