42
3062547_201802
26 Cascade operation - Flue gas
header design
For open flue operation, there
must
be an aperture in the boiler room that opens to the
outside and has a clear cross-section of at least 150 cm².
Where necessary, adapt the installation examples to the relevant building regulations
and requirements in your country/region. Discuss any questions relating to the
installation, particularly of
inspection covers and ventilation apertures (ventilation
generally required above 50 kW output)
with your local heating engineer.
Flue gas routing with header
Oil condensing boilers with common flue routing - open flue operation in installation
type B23.
The effective heights specified are only valid on the condition that the length of the flue between the individual appliances and
downstream of the last appliance does not exceed 2 m. 325 m was assumed as the geodetic height. If the conditions at the
installation site are different, an individual calculation is required.
Number
2 x
COB-29
2 x
COB-29
3 x
COB-29
4 x
COB-29
2 x
COB-40
3 x
COB-40
4 x
COB-40
Installation
Type B23
Flue internal diameter
DN 110
DN160
DN160
DN160
DN160
DN160
DN160
Total flue gas mass flow rate
g/s
26,6
26,6
40.0
53,3
35,0
52,5
70,0
max. Flue gas temperature
°C
76
83
Max. effective building height
m
30
Cascade control with header
DWTK
min. 600
max. 1000
min. 605
max. 2000
min. 600
max. 1000
min. 600
max. 1000
KM module
Flue cascades are only suitable in balanced flue operation. They must be designed to
EN 13984-1.
To prevent flue gas escaping, a flue cascade is only permitted with a
tested flue gas damper. Escaping waste gas may lead to asphyxiation
or severe to life-threatening poisoning.
Flue cascade
Ceiling height at least 2500 mm
Summary of Contents for COB
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