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La Nordica Monoblocco Ghisa 750 Manual

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ENGLISH
DESCRIPTION
The device is made up of metal sheet plates in painted steel, castings of cast iron and refractory materials.
The hearth is coated by cast iron castings or IRONKER, the grate holder and the related extractible grating are both made of cast iron. The
combustion chamber assembly is air-tight by welding and covered with a galvanized sheet metal carter.
The devices are equipped with a hearth with double thickness rear part made up of a drilled extractible plate.
Through these holes, pre-heated air gets into the hearth; in this way, it is possible to achieve a post-combustion with an increase of the yield
and a reduction of emissions of unburnt gases.
The sight door is assembled on extensible ball guides, which assure a robust and silent operation reliable in time.
The door lifting counter-weight is supported by two sturdy chains with related pinions.
The ceramic glass (resistant up to 700 °C) of the door allows a charming view on burning ames and avoids any leak of sparks and smoke.
ACCESSORIES
POKER GLOVE
Ventilation KIT
SERIES SERIES OPTIONAL
Under the hearth grating there is a easily extractable ash drawer, also when the appliance works.
The heating of the room occurs:
a) by convection: the passage of air through the coating and the covering hood releases heat in the room.
b) by radiation: through the sight glass and the steel body, heat is radiated into the room.
The device is equipped with registers of primary and secondary air, with which it is possible to adjust the combustion air.
1A - PRIMARY air register (Picture 8)
With the air register located under the door of the hearth, it is possible to adjust the air ow through the ash drawer and the grating in
direction of the fuel. The primary air is necessary for the combustion process. 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 re live.
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 (Picture 8)
Under the door of the hearth there is a secondary air register.
This register must be opened (and therefore the lever completely pushed), in detail, for the combustion of wood, so that unburnt carbon
can be subject to a post-combustion, increasing the yield and assuring the cleaning of the glass (see chapter NORMAL OPERATION).
The adjustment of the registers necessary to reach the rated caloric yield is the following one:
Hourly consumption (kg/h) PRIMARY air SECONDARY air TERTIARY AIR
3,8 CLOSED OPEN PRE-ADJUSTED
FLUE
Essential requirements for a correct operation of the device:
• the internal section must be preferably circular;
• be thermally insulated and water-proof and produced with materials suitable to resist to heat, combustion products and
possible condensates;
• 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 ues 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.
For a correct installation please respect the sections/lengths of the ue shown in the technical data table. By installations
with dierent dimensions the ue must be suitably sized in accordance with EN13384-1.
The draught created by the ue must be sucient, 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.
ATTENTION: as far as concern the realisation of the ue connection and ammable materials please follow the requirements
provided by UNI 10683 standard. The ue must be properly spaced from any ammable 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 ue. Moreover, it is forbidden to create movable or
xed openings on the same for the connection of further other devices (Picture 4).
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