Ferroli NATURFIRE EVO 27 Instructions Pour L'utilisation Et L'entretien page 66

FLUE CONNECTION OR DUCT
Description
Duct or connection element between the unit and flue for evacuation of fumes.
Technical requirements:
▪ it must not cross rooms where the installation of combustion units is not allowed;
▪ flexible metal tubes or fibre cement pipes are prohibited;
▪ the use of counter-sloping elements is prohibited;
▪ horizontal sections must have an upward slope of at least 3%;
▪ the length of the horizontal section must be minimal and not more than 3 m;
▪ there must not be more than 3 changes of direction without the T union;
▪ with change of direction > 90° a max. of 2 bends can be used with length in horizontal
projection not exceeding 2 m.
▪ the fume duct must have a continuous section and allow the recovery of soot.
CHIMNEY CAP
Description
Device placed on the top of the flue to facilitate the dispersion of fumes into the atmosphere.
Technical requirements:
▪ it must have a section equivalent to that of the flue;
▪ it must have a useful section not less than double the internal section of the flue;
▪ it must prevent the entry of rain and foreign bodies and ensure the discharge of fumes in
any atmospheric condition;
▪ it must ensure an adequate dilution of fumes and be positioned outside the backflow
area;
▪ it must be without mechanical means of suction.
Provide for a sampling point (airtight and easily removable) on the fume
connection for periodical emissions checks.
The direct discharge of fumes must take place on the roof and not towards
closed spaces (even open air).
EXAMPLES OF CORRECT CONNECTION TO THE FLUE
Protection against rain
1
and wind
Insulated
flue
2
Anti-condensation
T connection
3
with inspection cap
66
NATURFIRE EVO 27 - 34
cod.48427M013_11/19
Protection against rain
1
and wind
T connection
insulated with
2
inspection cap
T connection
3
4
insulated with
inspection cap
EN