Wolf CGB-75 Installation And Operating Instructions Manual page 55

According to TRGI:
Connection to a moisture-resistant balanced flue
chimney (LAS), flue gas chimney or flue system
Chimneys and flue systems must be certified for combustion
equipment in accordance with local Building Regulations (CE
/ DIBT certification). Dimensioning is carried out using the cal-
culation tables according to the flue gas category. In addition
to the boiler connection bend or tee piece, up to two 87°/90°
diversions may be installed. Approval is required for positive
pressure operation.
Connection to a moisture-resistant balanced flue
chimney type C43x
Straight balanced flues may be up to 2.0 m long, when install-
ing the system in a balanced flue chimney. In addition to the
boiler connection bend, up to two 87° bends may be installed.
The balanced flue chimney must be certified [in Germany] by
the DIBT - Deutsches Institut für Bautechnik and must also
be approved for condensing operation with positive pressure.
Connection to moisture-resistant flue gas chimney
or a flue gas system type, B33 for open flue operation
Straight balanced flues must be no longer than 2 m when
connecting the system to a flue gas chimney. In addition to the
boiler connection bend, up to two 87° bends may be installed.
The flue gas chimney must be certified by DIBT [Germany]
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
The straight, horizontal flue must not be longer than 3m.
In addition to the boiler connection bend, up to two 87° diver-
sions may be installed into the horizontal flue.
For this option, observe the regulations concerning ventilation
for boiler rooms acc. to DVGW-TRGI.
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28. Technical information
Connection to moisture-resistant flue, type C53,
C83x, for room sealed operation
The straight, horizontal flue must not be longer than 3 m. For
horizontal air supply pipes, a maximum length of 3 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 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. If using third party
equipment that is only DIBT or CE certified, the installer is
responsible for the correct sizing and correct function of the
system. Faults, material losses and injuries resulting from in-
correct pipe lengths, excessive pressure drop, premature wear
with escaping flue gas and condensate or incorrect function,
e.g. through components working themselves loose, are ex-
cluded from our warranty if third party equipment that is only
DIBT/CE certified is used. Straight balanced flues must be no
longer than 2 m, when connecting the system to a combustion
air supply and a separate flue.
In addition to the boiler connection bend, up to two 87°/90°
bends may be installed.
If the combustion air is drawn from the duct, the duct must be
free from contamination.
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