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NORMA S-EVO IDRO DSA / STEEL S-EVO IDRO DSA / CLASSIC S-EVO IDRO DSA

22 7197135s - IT-EN-DE-FR

7. 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 minimum section must be 4 dm

2

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

dm

2

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.

As it must always go past the ridge of the roof, the chimney pot must ensure exhaust even in the presence of wind (Picture 4 at page 55).

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.

7.2. 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.

UNI 10683 standard. The ue must be properly spaced from any ammable materials or fuels through a proper insulation or an air cavity.

For a better working of the appliance, it is suggested to have a ue draught of 17 - 20 Pascal (= 1,7 - 2,0 mm of column of water).

The measurement has always to be carried out with hot device (rated thermal performance).

When the depression exceeds 20 Pa (=2,0 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 sufcient air for combustion is introduced into the place of installation (see paragraph

AIR FLOW IN THE PLACE OF INSTALLATION DURING COMBUSTION).

7.3. CONNECTING A FIREPLACE OR OPEN HEARTH TO THE FLUE

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

important principles must be respected: