Safety
Design Information
Page 12
B0190806
I
2
2.3.5
Chimney connection / chimney system
The standard EN 303-5 specifies that the entire flue gas system must be
designed to prevent, wherever possible, damage caused by seepage,
insufficient feed pressure and condensation.
It should be noted here that flue gas temperatures of less than 160 K
above room temperature can occur within the permitted operating range
of the boiler.
The flue gas temperatures (when cleaned) and the additional flue gas
values can be found in the technical specification sheets.
Page 12, Boiler data for constructing the flue gas system
Install the connection to the chimney via the shortest path, as far as
possible under 30 – 45°. Insulate the connector.
The entire flue gas system (chimney and connection) must be worked
out as per ÖNORM / DIN EN 13384-1 or prior standards ÖNORM M
7515 / DIN 4705-1.
In addition, local and other legal regulations apply!
The chimney must be approved by a smoke trap sweeper or
chimney sweeper.
As per TRVB H 118 (only in Austria) an explosion flap must be
installed in the flue pipe or in the chimney.
Draught limiter
We recommend that you install a draught limiter 1
Install the draught limiter directly under the mouth of the flue line,
as there is always low pressure there.
Boiler data for constructing the flue gas system
Component
Unit
P2-10
P2-15
P2-20
P2-25
Flue gas temperature
NL
°C
150
150
155
160
Flue gas mass flow
NL
PL
kg/h
38
12
38
12
51
16
64
20
Flue gas mass flow
NL
PL
kg/s
0.0106
0.0033
0.0106
0.0033
0.0142
0.0044
0.0178
0.0056
Feed pressure required
NL
PL
Pa
7
4
7
4
7.5
4.5
8
5
Feed pressure required
NL
PL
mbar
0.07
0.04
0.07
0.04
0.075
0.045
0.08
0.05
Flue pipe diameter
mm
130
130
130
130
NL = Nominal Load, PL = Partial Load
1
