S-CB
+
Boiler Range Manual
29
8.5 Pipe heights and mutual distances on a flat roof
Height A
This is the height of the air inlet. A rain hood should prevent
rainwater entering the air supply system.
When the inlet and outlet are mounted on a flat roof, the inlet should
be at least 60 cm above the roof surface and at least 30 cm above the
maximum snow level.
Example 1:
When the maximum snow level on the roof surface is 45 cm then the
air inlet should be at 45+30=75 cm. 75 cm is more than the minimum
60 so the height will be 75 cm.
Example 2:
When the maximum snow level on the roof surface is 15 cm then the
air inlet should be at 15+30=45 cm. 45 cm is less than the minimum
60 cm so the height will be 60 cm.
Height difference B
This is the distance between the flue outlet and the air inlet.
The flue gas outlet should be at least 70 cm above the air inlet. It is
advised to be equipped with a conical outlet.
When no air inlet connection is applied on the roof, the flue out-
let should be situated at least 100 cm above the roof surface.
Distance C
The horizontal mutual distance at roof level.
This distance should be at least 70 cm.
8.6 B23P certified
Overpressure flue gas systems
For boiler classification B23P and for overpressure flue gas systems the minimum requirements of the flue gas
material for Eco Boilers can be determined in a designation string according to the EN1443 (see table):
CE string flue gas
material (B23P)
European stan-
dard
Tempera-
ture class
Pressure
class
Resistance to
condensate
Corrosion resis-
tance class
min. requirement PP
EN 14471
T120
P1
W
1
min. requirement StS
EN 1856-1
T120
P1
W
1
Metal: liner
specifications
Soot fire resis-
tance class
Distance to
combustible
material
Plastics:
location
Plastics: fire
behaviour
Plastics:
enclosure
O
30
I or E
C/E
L
L20040
O
40
A few examples of flue gas material suitable for ECO boilers:
CE String for Plastic PPs: EN14471 T120 P1 W 2 O(30) I C/E L
CE String for Stainless Steel: EN1856-1 T250 P1 W V2-L50040 O (50)
When selecting flue gas systems, be aware that the minimum requirements are met. So only select flue gas mate-
rials having the same or better properties than this table.
8.7 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 stan-
dards. It must be able to handle the condensate forming and transport, overpressure and must have a minimum
temperature class of
T120
.
Summary of Contents for S-CB+ Series
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