Wolf CGB-2-24 - Page 75

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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 ue gas return preventer is used to prevent a
returnowofuegas.Theinstalleduegassystemmustbe
certiedformultipleconnectiontoacommonchimney.Evi-
dence of suitability must be provided by relevant calculations
inaccordancewithreprotectionregulations.
Themaximumoverpressureintheuesystemmaynotexceed
200 Pa.
37.Technicalinformation,air/uegas
routing
Connectiontoamoisture-resistantroomsealedbalanced
ue,uechimneyoruesystemtypeC43x
Horizontalbalanceduesmustnotbemorethan2mlong
whenconnectingthesystemtoabalanceduechimney.
The room sealed balanced ue chimney must be certied
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uegaschimneyora
uesystemtypeB33foropenueoperation
Horizontalbalancedues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uegaschimneymustbecertied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uetypeB23foropen
ueoperation
For this option, observe the regulations concerning ventilation
for boiler rooms acc. to DVGW-TRGI.
Connectiontoamoisture-resistantue,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uesthatare
not surrounded by combustion air acc. to DVGW-TRGI 2008
and all locally applicable combustion regulations.
Connectiontoacombustionairandue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certied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 ue 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certicationisused.
If the combustion air is drawn from the duct, the duct must be
free from contamination.
C43x
Fig: Cascade Fig: Multiple connection