Wolf COB - Cascade Operation - Flue Gas Header Design

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26 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 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 ue routing - open ue operation in installation
type B23.
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.
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 ue gas mass ow 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 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.Escapingwastegasmayleadtoasphyxiation
orseveretolife-threateningpoisoning.
Fluecascade
Ceiling height at least 2500 mm