Manual La Nordica VENERE (page 21 of 72) (English, German, French, Italian)

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ANTHEA – VENERE

7194201 Rev.06 – EN 21

The following features are FORBIDDEN and therefore

they endanger the good operation of the device:

asbestos cement, galvanized steel, rough and porous

internal surfaces. Picture 4 gives some examples of

execution.

The minimum section must be 4 dm

(for example 20

x 20 cm) for devices whose duct diameter is

lower than 200 mm or 6.25 dm

(for example 25 x 25

cm) for devices with diameter greater than 200

mm.

The draught created by the flue must be sufficient, but not

excessive.

A too big flue section can feature a too big volume to be

heated and consequently cause difficulties in the

operation of the device; to avoid this, tube the flue along

its whole height. A too small section causes a decrease of

the draught.

The flue must be properly spaced from any

flammable 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 flue. Moreover, it is forbidden to create

movable or fixed openings on the same for the

connection of further other devices.

6. CONNECTION TO THE CHIMNEY

For safety reasons the door of the appliances with constructive system 1, must be opened only for the loading

of the fuel or for removing the ashes, while during the operation and the rest, the door of the hearth must

remain closed.

The appliances with constructive system 2 must be connected to their own flue. The operating with open door

is allowed under supervision. The connection pipe to the flue must be the shortest possible, right, tight and

according to the current regulations.

The connection to the chimney must be performed with stable and strong pipes (we recommend a thickness of

2 mm). The pipe for smokes exhaust must be fixed hermetically to the chimney. The diameter inside the

connection pipe must correspond to the external diameter of the smokes exhaust small trunk of the stove. This

is ensured by pipes according to DIN 1298.

ATTENTION: Eventual flammable pieces in the area of 20 cm round the connection pipes must be changed

with fireproof and not sensitive to heat materials.

For a good operation of the equipment it is essential that in the installation place it is introduced sufficient air

for combustion (see CHAPT. 10).

The depression on the chimney should be 12 - 14 Pa (=1.2-1.4 mm of water column). The measurement must

be done always with the equipment hot (rating calorific value). When the depression exceeds 17 PA (1.7mm of

water column) it is necessary to reduce the same with the installation of an additional flue adjuster (butterfly

valve) on the exhaust pipe or in the chimney.

For safety reasons the door of the stove must be opened

only for the loading of the fuel or for removing the

ashes, while during the operation and the rest, the door of the hearth must remain closed.

6.1. CHIMNEY CAP POSITION

The draught of the flue depends also on the suitability of the chimney cap.

Therefore, if it is handicraft constructed, the output section must be more than twice as big as the internal

section of the flue.

Should it be necessary to exceed the ridge of the roof, the chimney cap must assure the discharge also in

case of windy weather (Picture 5).

The chimney cap must meet the following requirements:

Picture 4

(1) AISI 316 steel flue with double chamber

insulated with material resistant to 400°C.

Efficiency 100% excellent.

(2) Refractory flue with double insulated chamber

and

external coating in lightweight concrete.

Efficiency 100% excellent.

(3) Traditional clay flue square section with

cavities. Efficiency 80% excellent.

(4) Avoid flues with rectangular internal section

whose ratio differs from the drawing. Efficiency

40% poor.

A+1/2A

Max.

A+1/2A

(3)

(1)

(2)

(4)

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