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Helga Pietra
Инструкция по эксплуатации Страница: 17

La Nordica Helga Pietra [17/68] Technical description

HELGA

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5. 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 sheets in galvanized and painted steel, of cast iron (grate and grate holder of the hearth, exhaust pipe) of majolica

tiles and of glass panels. The hearth is totally sheathed with cast-iron single sheets and refractory material (NORDIKER). Inside there are

a easy extractable thick at grate and its holder. The combustion chamber is hermetic welded and is sheathed with a painted steel carter.

The inside smoke plate made of vermiculite, reects the re radiation and increases the internal temperature of the combustion chamber.

This process together with the exhaust gases ows, makes optimal the combustion and improves the efciency.

The one-piece ceramic glass of the door (resistant up to 700°C) allows a wonderful view on the burning ames. Furthermore, it is thus

avoided the output of sparks and smoke.

Below the hearth grate there is an extractable ash drawer, (Picture 8 at page 61).

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 stove is equipped with controls of primary and secondary air by which it is adjusted the combustion air.

1A - PRIMARY air register (Picture 7 at page 61)

With the air register located under the door of the hearth (on the left), 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 during the ignition. The ash drawer has to

be emptied regularly, so that ash cannot hinder the intake of primary air for the combustion. The register is closed when the lever is

completely pulled out. The register is open when the lever is introduced.

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 7 at page 61)

Under the door of the hearth (on the right) there is a secondary air register.

This valve must be opened, 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. Through this register it is possible to adjust the power of the stove. The register is open

when the lever is completely pulled out. The register is closed when the lever is introduced. (see chapter NORMAL OPERATION).

It is possible to get the air SECONDARY directly from outside through a exible tube (reproof NOT furnished Picture 9 at page 62

A).

The adjustment of the registers necessary to reach the rated caloric yield is the following one:

Hourly consumption in Kg/h PRIMARY air SECONDARY air TERTIARY AIR

HELGA 1,9 CLOSED OPEN Pre ADJUSTED

ACCESSORIES RING Ø 100 mm air tting

ventilation additional

POKER GLOVE

SERIES SERIES SERIES

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 ues 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. Picture 1 at page 58 shows some example solutions.

The minimum section must be 4 dm

(for example 20x20 cm) for appliances whose pipe dimensions are less than 200 mm, or 6.25

(for example 25x25 cm) for appliances with a diameter of more than 200 mm.

The draught created by your ue must be sufcient but not excessive.

A section of the ue which is too large can present a volume which is too large to heat and therefore cause operating difculties 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.

The ue must be at a suitably distance from ammable or combustible material using suitable insulation or an air space.

It is FORBIDDEN to pass system piping or air ducts inside the ue. It is also forbidden to create moveable or xed openings on the ue

itself, for the connection of further different appliances (See chapter CONNECTING A FIREPLACE OR OPEN HEARTH TO THE FLUE).

La Nordica Helga Pietra [17/68] Technical description

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