Biasi RINNOVA ADAPTIVE 25S User Manual And Installation Instructions page 44

the residual pressure difference at the fan:
Useful static pressure at
nominal heat input
Overheated flue
Maximum recirculation of
CO2 in the suction duct
TYPE C (Figure 5.12)
83
The boiler with this type of outlet installed must
take the comburent air from the outside and dis-
charge the flue gas in the individual or collective
chimney designed for this purpose.
C83
Figure 5.12
Roof-mounted flue gas outlet kit (Figure 5.13)
This kit makes it possible to release the flue gases
directly through the roof.
Coaxial duct Ø 80/125 mm
Nominal length
Maximum length
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INSTALLATION
25 kW 270 Pa
190 Pa
30 kW
35 kW 190 Pa
25 kW 92 °C
30 kW 94 °C
96 °C
35 kW
25 kW 1,2 %
30 kW 1,4 %
35 kW 1,4 %
0.96 m
12 m
C33
Ø 125
Figure 5.13
Extensions are available for reaching the maxi-
mum height.
Coaxial Ø 80/125 mm 90° and 45° elbows are
available that reduce the total max. length of the
ducts by:
For a 45° elbow loss
For a 90° elbow loss
TYPE B (Figure 5.14)
23P
This type of flue gas outlet extracts the necessary
combustion air from the same room as the boil-
er is installed in; the combustion products must
be released outside and the outlet pipe can be
through the wall or a chimney.
TYPE B duct
23P
Minimum length
Maximum length (A + B)
There must be a suitable air intake in
the room where the boiler is in-
stalled for the supply of combustion
air and for room ventilation.
For proper operation, the minimum necessary
air exchange must be 2 m
input.
90°
45°
0.5 m
1 m
0.5 m
40 m
3 /h for each kW of heat