23
Direct emission into the atmosphere
Natural draught boilers can discharge flue gas directly into the at-
mosphere by means of a pipe passing through the outside walls of
the building and ending with a terminal.
The flue gas discharge system must comply with the following re-
quirements:
• the horizontal part inside the building must be as short as possible
(max length 1,000 mm);
• no more than 2 direction changes can be implemented;
• it can host only one single boiler flue pipe;
• the pipe through the wall must be protected by a sheath; the part
of the sheath facing the inside of the building must be closed, the
part facing outward open;
• the end section, on which the terminal is to be installed, must pro-
trude from the wall of the building at least twice the diameter of
the pipe;
• the terminal must be positioned at least 1.5 metres higher than
the first pipe connected to the boiler (pic. 11).
The MANUFACTURER can not be held liable for damage resul-
ting from incorrect installation, use or modification of the
boiler, or failure to follow manufacturer’s instructions or the
applicable installation standards for the product.
3.2.7. Air intake/flue gas system of forced draught boilers
When positioning the boiler exhaust terminals onto the wall, com-
ply with laws and standards applicable in the country of installa-
tion, which are considered as an integral part of this manual.
2 Ø min.
2 Ø min.
1,5 m min.
1,5 m min.
Ø
Ø
2 Ø
2 Ø
1 m max.
1 m max.
Pendenza
min. 3 %
Pendenza
min. 3 %
> 3 Ø
> 3 Ø
Slope
Slope
pic. 11 - Connection to the chimney for CTN and RTN
pic. 12 - Dimensions for connecting to t
he flue gas pipe for CTN
450
750
330
Ø 130,8
131
232
7 mm
218
325
