External Air Intake; Allowed / Not Allowed Fuels - La Nordica WF25 DsA Manual Del Usuario

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
This must always be installed since its function is that of letting the heat collected within the hood (overpressure) flow out
into the room.
ATTENTION: We recommend making the counterplate in fire-retardant plasterboard with self-supporting metal frame, so
that its weight does not bear on the aesthetic covering (marble). We recommend providing an inspection door on the
counter plate or elsewhere as suitable to provide easy accessibility and visibility of the safety devices (pressure gauges,
valves,..).

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
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* (For a better comfort and corresponding oxygenation of environment, the combustion air can be directly withdrawn at the outside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
connection with the outside it must be endowed with a special windbreak.)

ALLOWED / NOT ALLOWED FUELS

Allowed fuels are logs. Use exclusively dry logs (max. content of water 20%). Maximum 3 logs should be loaded. The pieces of wood
should have a length of ca. 20-30 cm and a maximum circumference of 30-35 cm.
Compressed not worked-out wood briquettes must be used carefully to avoid overheating that may damage the device,
since these have a very high calorific value.
The wood used as fuel must have a humidity content lower than the 20% and must be stored in a dry place. Humid wood tends to burn
less easily, since it is necessary a greater quantity of energy to let the existing water evaporate. Moreover, humid content involves
the disadvantage that, when temperature decreases, the water condensates earlier in the hearth and therefore in the stack causing
a remarkable deposit of soot with following possible risk of fire of the same.
Fresh wood contains about 60% of H
It is necessary to place this wood in a dry and ventilated place (for example under a roofing) for at least two years before using it.
Besides others, it is not possible to burn: carbon, cuttings, waste of bark and panels, humid wood or wood treated with
paints, plastic materials; in this case, the warranty on the device becomes void.
Paper and cardboard must be used only to light the fire.
The combustion of waste is FORBIDDEN and would even damage the appliance and the flue, causing health damages and claims
by the neighborhood owing to the bad smell.
The wood is not a fuel which allows a continuous operation of the appliance, as consequence the heating all over the night is not
possible.
Variety
Beech
Oak
Elm
28
(Picture 7 pos. 6) has to be installed on the upper part of the hood at about 20 cm from the roof.
13):
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
internal air intake for the fan, if present (C);
150 cm
2
Picture 13), a maximum length of 4 m and with no more than 3 bends. If there is a direct
O, therefore it is not suitable to be burnt.
2
kg/mc
750
900
640
ENgLIsH
kWh/kg 20%
moistness
4,0
4,2
4,1