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smokes at output.
The failed tightness of the connection can cause the malfunction of the device.
The internal diameter of the connection pipe must be equal to the external diameter of the smokes stub pipe of the device. This is assured
by the pipes complying with DIN 1298.
For a better working of the appliance, it is suggested to have a flue draught of 14 Pascal (=1.4 mm of column of water).
The measurement has always to be carried out with hot device (rated thermal performance).
When the depression exceeds 17 Pa (=1.7 mm of column of water), it is necessary to reduce the same by installing an additional draught
regulator (butterfly valve) on the exhaust pipe or in the chimney, according to the regulations in force.
IMPORTANT: When using metallic pipes, they must be insulated with proper materials (coatings in insulating fibers resistant up
to 600°C) in order to avoid deterioration of walls or of the counter-hood.
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
the minimum requirements:
Top:
Base:
In this way, the following targets are achieved:
• a greater safety
• an increase of the heat created by air circulation around the device.
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,..).
The heat vent grating
(Picture 7 at page 42
always be installed since its function is that of letting the heat collected within the hood (overpressure) flow out into the room.
6.2.
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 16 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.)
7. CONNECTION AND MAINTENANCE OF VENTILATION (OPTIONAL)
The control unit and the plant must be installed and connected by authorized personnel according to the standards in force. (see
chapter GENERAL REMARKS).
ATTENTION: the control unit and the feeding cable must not be in contact with hot parts.
On our products, it is possible to install Optional ventilation kits suitable to improve the distribution of heat by ventilation only either of the
installation room or of the adjacent local (see chapter EXTERNAL AIR INTAKE).
For the installation of the Forced Ventilation Kit, follow the given instructions. (see chapter OPTIONAL VENTILATION KIT).
The Kit is made up of a centrifugal fan, a lighting and adjustment control unit, and a (TM) thermostat that lets the fan start when the
18
Minimum opening 1000 cm
Minimum opening 750 cm
2
pos. 6) has to be installed on the upper part of the hood at about 20 cm from the roof. This must
45):
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
Picture 16 at page
45), a maximum length of 4 m and with no more than 3 bends. If there is a direct connection
2
MONOBLOCCHI 600 - 750 - 900
Picture 7 at page 42
Picture 15 at page 45
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represent
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