Bedienungsanleitung La Nordica Wanda Evo (Seite 25 von 96) (Deutsch, Englisch, Französisch, Italienisch, Spanisch)

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ENGLISH

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 ue 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 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 shows some example solutions.



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 your ue must be su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 di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.

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 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 dierent appliances (See chapter CONNECTING A FIREPLACE OR OPEN HEARTH TO THE

FLUE).

CHIMNEY POT

The ue draught depends on the suitability of the chimney pot.

It is therefore essential that, if built in a handcrafted way, the exit section is more than twice the internal section of the flue (Picture 2) .

As it must always go past the ridge of the roof, the chimney pot must ensure exhaust even in the presence of wind (Picture 3).

The chimney pot must meet the following requirements:

• Have an internal section equivalent to that of the chimney.

• Have a useful exit section of double the internal section of the ue.

• Be built so as to prevent rain, snow or any foreign body entering the ue.

• Be easy to inspect, for any maintenance and cleaning operations.

CONNECTION TO THE CHIMNEY

Products with automatic door closing (type 1) must operate, for safety reasons, with the furnace door closed (except during the fuel loading

or ash removal phases).

Products with non-automatic door closing (type 2) must be connected to their own ue.

Operation with doors open is only allowed when supervised.

The connection pipe to the ue must be as short as possible, straight horizontal and positioned slightly in ascent, and watertight.

Connection must be carried out with stable and robust pipes,comply with all current Standards and Regulations and to those envisioned by

the law, and be hermetically secured to the ue. The internal diameter of the connection pipe must correspond to the external diameter of the

appliance ue gas exhaust stub pipe (DIN 1298).

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. Minimum distance safety 25 cm.

The chimney pressure (DRAUGHT) must be at least (see chap. TECHNICAL DATA SHEET) Pascal. The measurement has always to be carried

out with hot device (rated thermal performance).

When the depression exceeds 17 20 Pa (=1.7 =2 mm of column of water), it is necessary to reduce the same by installing an additional draught

regulator (buttery valve) on the exhaust pipe or in the chimney, according to the regulations in force.



For correct appliance operation, it is essential that sucient air for combustion is introduced into the place of installation (see

paragraph VENTILATION AND AERATION OF THE INSTALLATION PREMISES).

CONNECTING A FIREPLACE OR OPEN HEARTH TO THE FLUE

The ue gas channel is the stretch of piping which connects the product to the ue. In the connection, these simple but extremely important

principles must be respected:

• under no circumstances use a ue gas channel with a diameter less than that of the exhaust clamp with which the product is equipped;

• each metre of the horizontal stretch of the ue gas channel causes a slight loss of head which must be compensated if necessary by

elevating the ue;

La Nordica Wanda Evo Seite 25

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