3064810_201804
75
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 system may not exceed
200 Pa.
37. Technical information, air/flue gas
routing
Connection to a moisture-resistant room sealed balanced
flue, flue chimney or flue 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 room sealed balanced flue chimney must be certified
by DIBT - Deutsches Institut für Bautechnik [Germany] or
CE-designated and must be approved for condensing opera-
tion with positive/negative pressure.
For sizing, use calculations to EN 13384.
Connection to a moisture-resistant flue gas chimney or a
flue system type B33 for open flue operation
Horizontal balanced flues must be
no longer than 2 m
when
connecting the system to a chimney. In addition to the boiler
connection bend, no more than
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 a 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 a 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,
the installer himself is 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 bearing only DIBT certification is used.
If the combustion air is drawn from the duct, the duct must be
free from contamination.
C43x
Fig: Cascade
Fig: Multiple connection
Summary of Contents for CGB-2 Series
Page 104: ...104 3064810_201804 46 Notes ...
Page 105: ...3064810_201804 105 46 Notes ...
Page 106: ...106 3064810_201804 46 Notes ...
