B
C
20 cm
A
14
Chapter 3
ASSEMBLY AND INSTALLATION INSTRUCTIONS
the fl ue connection.
It is forbidden to run other air feed channels or piping for utilities inside the exhaust channels, even if
they are oversized. It is also forbidden to fi t manual draught adjustment devices on the forced draught
appliance.
CHIMNEY OR SINGLE FLUE
The chimney or fl ue must meet the following requirements:
be airtight to combustion products, waterproof and properly insulated according to the usage conditions;
be made of materials suitable to resist normal mechanical stress, as well as heat and the action of combustion
products and any condensates;
have a predominantly vertical layout with deviations from the axis no greater than 45°;
be situated at a proper distance from combustible or fl ammable materials by means of an air gap or suitable
insulation material;
Minimum80 cm
2
Floor protection
REFERENCES
Flammable
objects
Non-fl ammable
objects
A
200
100
B
1500
750
C
200
100
preferably have a round internal section: square or rectangular sections must have rounded edges
with radius no less than 20 mm;
have a constant, free and independent internal section;
have rectangular sections with a maximum ratio between sides of 1.5.
The exhaust duct should be equipped with a chamber for the collection of solid materials and any
condensates located below the mouth of the exhaust channel, so that it is easy to open and inspect from
the airtight hatch.
fi gure 3.3
fi gure 3.4
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