Wolf CGB-11 Installation Instructions Manual page 58

Connection to a moisture-resistant balanced flue chimney
(MRC), flue gas chimney or flue gas system, type C 43x
Chimneys and flue gas systems must be certified for
condensing combustion equipment (DIBI certification, CE
[or local equivalent]). Sizing via calculation tables subject to
flue gas category. In addition to the boiler connection bend or
tee piece, up to two 90° diversions may be installed. Operation
with positive pressure may require an appropriate permit.
Straight balanced flues may be up to 2 m long, when
connecting the system to a balanced flue chimney.
The balanced flue chimney MRC must be certified [in Germany]
by the DIBT - Deutsches Institut für Bautechnik or must be CE-
designated; it must also be approved for condensing operation
with positive pressure.
Connection to a moisture-resistant flue gas chimney of a
flue gas system type B33 for open flue operation
Straight balanced flues may be up to 2 m long, when
connecting the system to a flue gas chimney. In addition
to the boiler connection bend, up to two 90° diversions may
be installed.
The flue gas chimney must be certified [in Germany] by the
DIBT or must be CE-designated; it must also be approved for
condensing operation.
The flue outlet should be obtained from the chimney
manufacturer, if necessary.
The air vents to the boiler room must be free of obstructions.
Connection to a moisture-resistant flue type B23 for open
flue operation
The straight, horizontal flue must not be longer than
2 m. In addition to the boiler connection bend, up to two 90°
diversions may be installed into the horizontal flue.
For this version, observe the ventilation requirements for boiler
rooms acc. to DVGW-TRGI.
58
Design information
Connection to a moisture-resistant flue type C53, C83x
for balanced flue operation
The straight, horizontal flue must not be longer than
2 m. For horizontal air supply pipes, a maximum length of
2 m is recommended. Observe special requirements for flues,
that are not surrounded by combustion air, acc. to DVGW-
TRGI 2008and all locally applicable combustion orders.
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 matched
for use with Wolf gas fired condensing boilers. When
using third party equipment that is only DIBT certified or
CD-designated, the installer will be responsible for the correct
sizing and perfect function of such systems. 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 non-approved third party equipment is used.
Straight balanced flues may be a maximum of 2 m long, when
connecting the system to a combustion air supply and a
separate flue.
In addition to the boiler connection bend, up to two 90°
diversions may be installed.
The chimney must be free from contamination, if the
combustion air is drawn from the chimney.
Multiple connection to a common chimney
These boilers are suitable for multiple connection to a common
chimney in accordance with the DVGW Code of Practice G 635.
An internal flue gas return facility is used to prevent a return
flow of flue gas. The plumb clearance between two gas fired
boilers must be at least 2.5 m. The installed flue gas system
must be certified for multiple connection to a common chimney.
A verification is required for the correct sizing in accordance
with fire protection regulations.
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