Air For Combustion; External Air Intake; Ventilation Hood Or Adjacent Local - La Nordica FOCOLARE 80 BIFACCIALE HYBRID Instrucciones Para La Instalación, El Uso Y El Mantenimiento

5.3.

AIR FOR COMBUSTION

It is necessary to ventilate continuously the space included between the upper part, the sides of the device and the deflector of the fire-
proofing material of the hood.
For this reason, it is necessary to foresee an intake of air from the bottom (intake of fresh air) and a high output (output of hot air). The
spaces foreseen for the circulation of air indicated in
In this way, the following targets are achieved:
• a greater safety
• an increase of the heat created by air circulation around the device
• a better working of the appliance
The heat vent grating (Picture 7 at page 65
always be installed since its function is that of letting the heat collected within the hood (overpressure) flow out into the room.
5.4.

EXTERNAL AIR INTAKE

There MANDATORY be sufficient quantity of air for combustion and re-oxygenation of the room to ensure the device will work properly.
There should therefore be vents letting air in from outside the building and enabling circulation of air for combustion even when the doors
and windows are closed.
• The air intake must be in a position where it cannot be obstructed.
• The air intake should communicate with the room in which the device is installed and be protected with a grille.
• Vents may communicate with adjacent rooms but NOT with garages, kitchens, bathrooms or boiler rooms (FORBIDDEN).
Any extractor hoods in the room where the device is installed must NOT operate at the same time as this could cause smoke to
•
enter the room, even with the fireplace's door closed.
Minimum dimensions (Picture 14 at page
A – natural convection:
B – forced convection:
* (For a better comfort and corresponding oxygenation of environment, the combustion air can be directly withdrawn at the outside through
a junction (B1) which is to be connected with a flexible pipe (not furnished)for the external air intake. The connection pipe must be flat with
a minimum diameter of (B1
with the outside it must be endowed with a special windbreak.)
MPORTANT: If you do not adopt the solution 1, you are obliged to adopt the solution 2. Otherwise, there is no supply of air
combustion, the product does not work!

6. VENTILATION HOOD OR ADJACENT LOCAL

The product can distribute heated air by natural convection or forced convection by means of a centrifugal fan; therefore, during installation,
it is necessary to establish the type of ventilation or convection to be adopted:
A) NATURAL CONVECTION:
To ease the natural circulation of air (upward movement due to the heating of the same) in the external enclosure of the stack, it is
necessary to remove the underlying semi-blanks (see
By choosing this convection system, it is recommended not to install the electrical fan.
B ) FORCED CONVECTION:
By installing a centrifugal fan, it is possible to distribute hot air to adjacent rooms by means of ducts with a length up to 4 meters. In this
case, do not remove the underlying semi-blanks (see
The covering of each product is equipped with 4 outputs with a diameter of 150 mm for the connection of pipes resistant to heat.
a) Perform the drilling on the walls or on the existing hood to allow the passage and the application of the (fire-resistant) hoses with a
15 cm diameter equipped with related openings.
b) Fasten the pipes by means of clamps to the related collars and openings, after having removed the semi-blanks caps.
22
_EN
Picture 7 at page 65
Top: Minimum opening 1000 cm
Base: Minimum opening 750 cm
pos. 6) has to be installed on the upper part of the hood at about 20 cm from the roof. This must
67):
300 cm
2
150 cm external air intake for the stack, if present (*B1);
2
150 cm external air intake for the fan, if present (B2);
2
150 cm internal air intake for the fan, if present (C);
2
Figura 14 at page 67), a maximum length of 4 m and with no more than 3 bends. If there is a direct connection
Picture 9 at page
- Picture 15 at page 67
2
2
Picture 9 at page 66).
66).
FOCOLARE 80 / 100 BIFACCIALE HYBRID
represent the minimum requirements:
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