Wolf CGB-75 - Page 49

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Generalinformation
Forreasonsofoperationalsafety,useonlyoriginalWolf
componentsforbalanceduesandstandardues.
Where necessary, adapt the installation examples to the rel-
evant building regulations and requirements in your country/
region. Discuss any questions relating to the installation of
inspectioncoversandventswiththelocaluegasinspector.
Atlowoutsidetemperatures,thewatervapour
contained in the ue gas may condense and
freezeontheair/uegasroutingsystem.This
icemayfallfromtheroofcausinginjuriesor
materiallosses.Preventfallingicewithsuitable
measures,e.g.installationofasuitablesnow
guard.
If the balanced ue crosses different oors,
routethepipesoutsidetheboilerroominside
aductwithareresistanceofatleast90min.,
andinlivingspaceoflowheightwitharesist-
anceofatleast30min.Firemayspreadifthese
instructionsarenotobserved.
Gas condensing boilers witha balanced ue
outletabovetheroofmayonlybeinstalledin
attics,orinroomswheretheceilingalsoforms
theroof,orwhereonlytheroofconstructionis
locatedabovetheceiling.
Thefollowingappliestogasboilerswithabalancedue
abovetheroof,whereonlytheroofstructureliesabove
theceiling:
Ifreresistanceisrequiredfortheceiling,the
pipesforcombustionairsupplyanduegas
must be equipped with a casing in the area
between the top edge of the ceiling and the
roofskin.Thecasingmustprovidethesame
reresistanceastheceilingandmustbemade
fromnon-combustiblematerials.Thereisarisk
ofrespreadingiftheserequirementsarenot
observed.
Ifreresistanceisnotrequiredfortheceiling,
routetheductsforcombustionairsupplyand
uegasexpulsionbetweenthetopedgeofthe
ceilingand the roof skin inside a duct made
fromnon-combustible,rigidmaterialsorinside
aprotectivemetalpipe(mechanicalprotection).
Thereisariskofrespreadingiftheserequire-
mentsarenotobserved.
Outsidetheduct,securethebalancedueor
standard ue with spacer clips. These must
beplacedataminimumof50cmfromtheap-
plianceconnectionandupstream/downstream
ofdiversions,topreventthepipejointsbeing
pulled apart. Failure to observe this creates
theriskofpoisoningcausedbyescapingue
gas. Furthermore, damage to the appliance
mayresult.
Noclearanceisrequiredbetweentheconcentricbalanced
ueandcombustiblematerialsorcomponents,astem-
peraturesabove85°Cwillnotoccurattheratedheating
output.
Ifonlyastandardueisinstalled,maintaintheclearances
speciedbyDVGW/TRGI2008[orlocalregulations].
A balancedue without a duct mustnot be
routed through other installation rooms, as
thereisariskofrespreadingandmechanical
protectionisnotensured.
Combustionairmustnotbedrawnfromchim-
neyspreviouslyusedtocarryuegasesfrom
oilorsolidfuelboilers.
Note
28.Technicalinformation