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36. Technical information, balanced flue
Connection to moisture-resistant
Balanced flue chimney,
flue gas chimney or flue gas system, type C 43x
Horizontal balanced flues must
not be more than 2 m long
when connecting the system to a balanced flue chimney.
The
balanced flue chimney must be certified by DIBT - Deutsches
Institut für Bautechnik [Germany] or CE-designated and must
be approved for condensing operation with positive/negative
pressure.
For sizing, use calculations to EN 13384.
Connection to moisture-resistant flue gas chimney or a
flue gas system type, B33 for open flue operation
Horizontal balanced flues must
not be more than 2 m long
when connecting the system to a flue gas chimney.
In addition
to the boiler connection bend, up to
two
90° diverters may be
installed.
The flue gas chimney must be certified by DIBT [Germany]
or CE-designated, and must be approved for condensing
operation.
If necessary, obtain the connection piece from the chimney
manufacturer.
The air apertures to the boiler room must be completely free
from obstruction.
Connection to moisture-resistant flue, type B23 for open
flue operation
For this option, observe the regulations concerning ventilation
for boiler rooms acc. to DVGW-TRGI.
Connection to moisture-resistant flue, type C53, C83x, for
room sealed operation
For horizontal air ducts, a maximum length of 2 m is recom-
mended. Observe the special requirements for flues that are
not surrounded by combustion air acc. to DVGW-TRGI 2008
and all locally applicable combustion regulations.
Connection to a combustion air and flue gas system type
C63x that is not tested together with the gas combustion
equipment
Original Wolf components are designed for long term use,
are designated with the DVGW quality seal and are designed
for use with Wolf gas condensing boilers. When using third
party equipment that is only DIBT certified or CE-designated,
installers themselves are responsible for the correct sizing
and trouble-free function of the system. Faults, material losses
and injuries resulting from incorrect pipe lengths, excessive
pressure drop, premature wear with escaping flue gas and
condensate or incorrect function, e.g. through components
working themselves loose, are excluded from our warranty if
third party equipment that is only DIBT certified is used.
If the combustion air is drawn from the duct, the duct must be
free from contamination.
Multiple connections/cascade
These boilers are suitable for multiple connections to a shared
chimney in accordance with DVGW Code of Practice G 635.
An internal flue gas return preventer is used to prevent a
return flow of flue gas. The installed flue gas system must be
certified for multiple connection to a common chimney. Evi
-
dence of suitability must be provided by relevant calculations
in accordance with fire protection regulations.
The maximum overpressure in the flue gas system may not
exceed 200 Pa.
C43x
Fig.: Cascade
Fig.: Multiple connection
