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ENGLISH
Should the ues have a square or rectangular section, internal edges must be rounded with a radius not lower than 20 mm. For the rectangular
section, the maximum ratio between the sides must be = 1.5.
A too small section causes a decrease of the draught. It is suggested a minimum height of 4 m.
The following features are FORBIDDEN and therefore they endanger the good operation of the device: asbestos cement, galvanized steel,
rough and porous internal surfaces. In Picture 3 gives some examples of execution.
For a correct installation please respect the sections/lengths of the ue shown in the technical data table. By installations
with dierent dimensions the ue must be suitably sized in accordance with EN13384-1.
The draught created by the ue must be sucient, but not excessive.
A too big ue section can feature a too big volume to be heated and consequently cause diculties in the operation of the device; to avoid
this, tube the ue along its whole height. A too small section causes a decrease of the draught.
ATTENTION: as far as concern the realisation of the ue connection and ammable materials please follow the requirements
provided by UNI 10683 standard. The ue must be properly spaced from any ammable 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 ue. Moreover, it is forbidden to create movable or
xed openings on the same for the connection of further other devices (Picture 4).
CHIMNEY CAP
The draught of the ue 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 ue (Picture 5).
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 6).
The chimney cap must meet the following requirements:
have internal section equivalent to that of the stack.
have a useful output section twice as big as the ue internal one.
be manufactured in such a way as to prevent the penetration of rain, snow, and any other foreign body in the ue.
be easily checkable, for any possible maintenance and cleaning operation
CONNECTION TO THE FLUE
The connection to the stack must be performed with sti pipes in steel comply with all current Standards and Regulations and to those
envisioned by the Law.
It is FORBIDDEN to use metallic pipes or pipes in asbestos cement since they jeopardize the safety of the tting itself,
considering that they are subject to tears or breaks resulting in leaks of smoke.
The exhaust pipe must be air-tight fastened to the stack and can have a maximum inclination of 45°; this to avoid excessive deposits of
condensate produced in the initial start-up phases and/or the excessive gripping of soot and moreover it avoids the slowing down of the
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.
The chimney pressure (DRAUGHT) must be at least (see chap. TECHNICAL DATA SHEET) . The measurement has always to be carried out
with hot device (rated thermal performance).
When the depression exceeds 17 Pascal (=1.7 mm of column of water), it is necessary to reduce the same by installing an additional draught
regulator (buttery valve).
IMPORTANT: When using metallic pipes, they must be insulated with proper materials (coatings in insulating bers resistant
up to 600°C) in order to avoid deterioration of walls or of the counter-hood.
Before positioning the insert in the pre-existing replace, it is necessary to close the upper internal part of the stack using (properly pre-
drilled) sheet metal or any other kind of re-resistant material that can support very high temperatures without suering any damage. (see
Picture 7 pos. 1 Inserti - Picture 11).
AIR FOR COMBUSTION
It is necessary to ventilate continuously the space included between the upper part, the sides of the device and the deector of the re-
proong 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).
Each of these openings must be free and it should not be possible to obstruct it; moreover, they must have a minimum surface of at least 3
dm
2
(example: 30 x 10 cm grating).
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 pos. 6 - Picture 11) has to be installed on the upper part of the hood at about 20 cm from the
roof. This must always be installed since its function is that of letting the heat collected within the hood (overpressure) ow out into
the room.
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