Crown Bermuda Installation Manual

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9
VI Venting
Ventinstallationmustbeinaccordancewithlocalbuildingcodes,orthelocalauthorityhavingjurisdiction,ortheNational
Fuel Gas Code,NFPA54/ANSIZ223.1.
AtypicalventinstallationisillustratedbyFigure8.Thecomponentsofventinstallationaretheventdamper(ifused),vent
connectorandchimney.
1) AcceptableChimneys-ThefollowingchimneysmaybeusedtoventBSIseriesboilers:
• ListedTypeBorLgasvent-Installinaccordancewiththemanufacturer’sinstructions,thetermsofitslisting,and
applicablecodes.
• MasonryChimney-ThemasonrychimneymustbeconstructedinaccordancewiththeStandard for Chimneys,
Fireplaces, Vents, and Solid Fuel Burning Appliances(NFPA211)andlinedwithaclaylinerorotherlistedlining
system.DonotventaBSIseriesboilerintoanunlinedchimney.
2) AcceptableVentConnectors-Thefollowingmaybeusedforventconnectors:
• ListedtypeBorLGasVent
• SingleWallGalvanizedPipe-Use0.018”(26gaugeorheavier).Thesizeandlocationofthechimneymaynot
permittheuseofasinglewallconnectorinsomecases.SeetheNational Fuel Gas Code.Donotusesinglewall
pipeforventconnectorsinattics.
• OtherVentConnectorsPermittedbytheNational Fuel Gas Code.
3) ChimneyandVentConnectorSizing-SizethechimneyandventconnectorinaccordancewiththeNational Fuel Gas
Code.
4) ExteriorChimneys-Anexteriorchimneyhasoneormoresidesexposedtotheoutdoorsbelowtheroofline.Thereare
twoconditionsunderwhichanexteriorchimneymaybeused:
• In some very restrictivecases,BSIseriesboilersmaybeventedintoanexteriorceramiclinedmasonrychimney.See
theNational Fuel Gas Codeforinformationonwhenexteriorchimneysmaybeused.
• AnexteriormasonrychimneymaybeusedifitislinedwithBventoralistedchimneyliningsystem.
5) Thisboilermaybeventedusingalistedpowerventer.Thepowerventermustbesizedandinstalledinaccordancewith
thepowerventermanufacturer’sinstructions,thetermsofthepowerventerlisting,andapplicablecodes.Theboilermustbe
electricallyinterlockedwiththepowerventertopreventboileroperationifthepowerventerfailstooperate.Beforedeciding
touseapowerventer,makecertainthattheuegasexitingthepowerventerwillnotdamageadjacentconstructionorother
structures.Alsomakecertainthatthepowerventerterminalwillnotbesubjectedtowindswhichcouldeffectpowerventer
operation.
6) Donotconnecttheventofthisapplianceintoanyportionofamechanicalventsystemoperatingunderpositivepressure.
7) Donotconnecttheboilerintoachimneyueservinganopenreplaceorothersolidfuelappliance.
8) Priortoboilerinstallation,inspectchimneyforobstructionsorotherdefectsandcorrectasrequired.Cleanchimneyas
necessary.
9) Ventpipeshouldslopeupwardfromdraftdiverternotlessthanoneinchinfourfeet.Noportionofventpipeshouldrun
downwardorhavesags.Ventpipemustbesecurelysupported.
10) Theverticalsectionofventpipecomingofftheboilershouldbeastallaspossible,whilestillmaintainingtheproper
clearancefromthehorizontalventconnectortocombustiblesandtheproperpitchcalledforin(9)above.
11) Ventpipeshouldbeinstalledabovethebottomofthechimneytopreventblockage.
12) Ventpipemustbeinsertedushwithinsidefaceofthechimneylinerandthespacebetweenventpipeandchimney
sealedtight.
13) Donotinstalltheventdamperinanyportionoftheventsystemwhichisusedbyappliancesotherthantheboilerbeing
installed.