Wolf CGB-75 Assembly And Operating Instructions Manual page 49

The following applies in accordance with local
regulations:
Connection to a moisture-resistant balanced flue
chimney (LAS), flue gas chimney or flue gas system
Chimneys and flue gas systems must be certified for
combustion equipment in accordance with local Building
Regulations (CE certification). 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.
Connection to a moisture-resistant balanced flue
chimney type C43x
Straight balanced flues may be up to 2.0 m long, when
installing the system in a balanced flue chimney. In addition
to the boiler connection bend, up to two 90° diverters may be
installed.
The balanced flue chimney (LAS) must be inspected by the
relevant authority and approved for pressurised condensing
operation.
Connection to a moisture-resistant flue gas chimney
or a flue 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 90°
diverters may be installed.
The flue gas chimney must be inspected by the relevant
authority and must be approved for condensing operation.
If necessary, the flue outlet should be obtained from the
chimney manufacturer.
The air vents to the boiler room must be free from obstruction.
Connection to a moisture-resistant flue type B23 for
open flue operation
The straight, horizontal flue must not be longer than 3 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 local regulations.
3062555_201507
Design information
Connection to a moisture-resistant flue type C53,
C83x for balanced flue operation
The straight, horizontal flue must not be longer than 3 m.
For horizontal air supply pipes, a maximum length of 3 m is
recommended. Observe special requirements for flues that are
not surrounded by combustion air acc. to local regulations or
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 condensing boilers. When using CE-
designated third party equipment, the installer is 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-CE-approved third party equipment
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 90°
diverters may be installed.
The chimney must be free from contamination if the combustion
air is drawn from the chimney.
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