S-CB Px 120 Manual
28
8.6.
C63 certified
In general boilers are certified with their own flue gas material. If a boiler is C63 certified, no specific type flue gas
material has been certified in combination with the boiler. In this case the flue gas material does not need to be
certified in combination with the boiler but should be fit for purpose, and comply with the applicable European
standards. It must be able to handle the condensate forming and transport, over pressure and must have a mini-
mum temperature class of
T120
.
8.7.
Flue gas outlet & combustion air inlet calculation examples
For five typical flue gas outlet & air inlet configurations the maximum lengths of the straight pipes will be calcula-
ted. First the general component values are given in the next table
:
Resistance R [Pa]
* Ø =
100 mm
130 mm
150 mm
twin pipe
conc.
/150
twin pipe
twin pipe
Component
flue
air
flue
air
flue
air
straight tube/m
6,5
4,0
10
1,8
1,1
0,8
0,4
45° bend
3,2
2,0
9,0
0,8
0,5
0,4
0,2
90° bend
6,5
4,0
13
1,8
1,1
0,7
0,4
roof terminal zeta = 0,05
1,1
0,4
0,2
roof terminal zeta = 1,0
22,1
16,7
7,8
5,8
4,4
3,3
roof terminal zeta = 1,5
33,2
11,6
6,6
roof terminal concentric
45
Values printed in
grey
applicable for
larger pipe diameters than regular
boiler connection.
wall terminal
24
concentric/TP adaptor
22
* Do NOT reduce pipe diameters relative to boiler connection diameter.
Zeta values:
NOTICE: This table can only be
used for a single flue/air system for
one boiler. Do NOT use this table
for common flue systems with cas-
caded boilers.
FLUE GAS OUTLET
zeta = 0
open outlet
zeta = 0,05
conical outlet
H/D = 1,0
zeta = 1,0
H/D = 0,5
zeta = 1,5
CONCENTRIC
FLUE GAS OUTLET
AIR INLET
ROOF
WALL
AIR INLET
H/D = 1,0
zeta = 1,0
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