Wolf COB - Flue Gas Header Version

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3062547_201507
22. Cascade operation
Flue gas header design
For open ue 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 of 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 ue routing - open ue operation in installation
type B23.
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 Art B23
Flue internal diameter DN110 DN160 DN160 DN160 DN160 DN160 DN160
Total ue gas mass ow rate g/s 26.6 26.6 40.0 53.3 35.0 52.5 70.0
Max. ue 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 ue operation. They must be designed to
EN 13984-1.
To prevent ue gas escaping, a ue cascade is only permitted with a tested
ue gas damper.
Flue cascade
Ceiling height at least 2500 mm
The effective heights specied are only valid on the condition that the length of the ue 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.