MCZ Flair - Manual (Page 15)

13
4-FLUE
Technical Dept. - All rights reserved - Reproduction is prohibited
EXTERNAL AIR INLET
It is mandatory to provide an adequate external air intake that supplies the combustion air required for the product to work properly. The
flow of air between the outside and the installation room may be direct, through an inlet in an external wall of the room; or indirect, via
air intake from adjoining rooms and connecting permanently with the installation room (see Figure 9 b). Adjoining areas may not include
sleeping areas, garages or general areas that present a fire hazard. During installation one must check the minimum clearances required
for air intake from outside. Take into account the presence of doors and windows that could interfere with the proper flow of air to the
stove (see diagram below).
The air intake must have a minimum total net area of 80 cm2: the surface must be increased accordingly if within the room there are other
active generators (for example: electric fan for stale air extraction, kitchen hood, other stoves, etc...), which could cause cause depression
in the room. One must verify that, with all the equipment on, the pressure drop between the room and the outside does not exceed a value
of 4 Pa. If necessary increase the intake section of the air inlet, which must be made at floor level and always protected with a bird-proof
outer protection grid and in such a way that it cannot be obstructed by any object.
It is possible to connect the air required for combustion directly to the outside air inlet, with a pipe of at least Ø50mm, with maximum
length of 3linear metres; each pipe bend shall be
considered equivalent to a linear metre. To attach the
pipe see the back of the stove.
For stoves installed in studio flats, bedrooms and
bathrooms (where allowed), it is mandatory to
connect the combustion air outside. In particular for
sealed stoves the connection must be sealed in order
not to compromise the overall sealed characteristic of
the system.
DISTANCE (metres) The air inlet must be at a distance of:
1.5 m UNDER Windows, doors, smoke outlets, cavities, ....
1.5 m HORIZONTALLY Windows, doors, smoke outlets, cavities, ....
0.3 m ABOVE Windows, doors, smoke outlets, cavities, ....
1.5 m AWAY from smoke outlet
CONNECTION TO THE FLUE
The connection between the flue and the appliance must be via a smoke duct that complies with EN 1856-2. The connecting section must
extend no more than 4 m horizontally, with a minimum slope of 3% and with a maximum of 3 90% bends (accessible for inspection - do
not count the T fitting at the appliance outlet).
The diameter of the smoke duct must be equal to or greater than that of the appliance outlet (Ø 80 mm).
TYPE OF SYSTEM SMOKE DUCT
Minimum vertical length 1.5 metres
Maximum length
(with 1 accessible 90° bend)
6.5 metres
Maximum length
(with 3 accessible 90° bends)
4.5 metres
Maximum number of accessible 90° bends 3
Horizontal sections
(minimum slope 3%)
4 metres
Use smoke ducts with a diameter of 80mm or 100mm depending on the type of system, with silicone gaskets or similar gaskets that
can withstand the high operating temperatures of the appliance (min. T200 class P1). The use of flexible metal hoses made of
fibre cement or aluminium is forbidden. For direction changes, we always recommend using a T fitting with an inspection
cap allowing easy access to clean the pipes. Always ensure that the inspection cap is put back in place and sealed hermetically with the
relevant seal intact after cleaning.
It is forbidden to connect several appliances to the same smoke duct, or the outlet from the overhead hoods. It is forbidden to extract the
combustion products directly through the wall, whether into indoor spaces or outdoors.
The smoke duct must be at a minimum distance of 400 mm from flammable or heat-sensitive structures.