Crown Bermuda Installation Manual

14) VentdamperinstallationismandatoryonallsizesfromtheBSI069toBSI276.TheBSI311throughBSI380maybe

orderedwithorwithoutventdamper.Ifsupplied,installventdamper(seeFigure9)asfollows:

a) Openventdampercartonandremoveinstallationinstructions.Readtheinstructionsthoroughlybeforeproceeding.

Verifythatventdamperissamesizeasdraftdiverteroutlet.SeeFigure1.Unpackventdampercarefully.Do not

force closed damper blade. Forcingventdamperclosedmayresultindamagedgeartrainandvoidwarranty.

b) Ventdamperisfactoryshippedhavingapproximately¾”diameterholeintheventdamperblade,whichmust

be left openforboilersequippedwithstandingpilot,andshouldbepluggedonboilerswithanintermittentpilot

system,usingtheplugsuppliedwiththedamper.

Mounttheventdamperontheuecollarwithoutmodicationtoeitherandsecurewithsheetmetalscrews.Make

surescrewsdonotinterferewithdamperbladeoperation.Ventdamperbladepositionindicatormustbevisibleto

users.

c) Thedamperwireharnessisshippedwiredintotheboilerjunctionbox.Plugthelooseendofthisharnessintothe

damperandsecuretheexibleconduittothedamperusingaconnectornutprovided.

d) Installventconnectorpipeandventttingsfromventdamperoutlettochimneyorgasvent.Securewithsheetmetal

screwsandsupportasrequired.

Removing an Existing Boiler from a Common Chimney

Insomecases,whenanexistingboilerisremovedfromacommonchimney,thecommonventingsystemmaybetoolarge

fortheremainingappliances.Atthetimeofremovalofanexistingboilerthefollowingstepsshallbefollowedwitheach

applianceremainingconnectedtothecommonventingsystemplacedinoperation,whiletheotherappliancesremaining

connectedtothecommonventingsystemarenotinoperation.

a) Sealanyunusedopeninginthecommonventingsystem.

b) Visuallyinspecttheventingsystemforpropersizeandhorizontalpitchanddeterminethereisnoblockageor

restriction,leakage,corrosionandotherdeciencieswhichcouldcauseanunsafecondition.

c) Insofaraspractical,closeallbuildingdoorsandwindowsandalldoorsbetweenthespaceinwhichalltheappliances

remainingconnectedtothecommonventingsystemarelocatedandotherspacesofthebuilding.Turnonclothes

dryersandanyappliancenotconnectedtothecommonventingsystem.Turnonanyexhaustfans,suchasrange

hoodsandbathroomexhausts,sotheywilloperateatmaximumspeed.Donotoperateasummerexhaustfan.Close

replacedampers.

d) Placeinoperationtheappliancebeinginspected.Followthelightinginstructions.Adjustthermostatsotheappliance

willoperatecontinuously.

e) Testforspillageatthedrafthoodreliefopeningafterve(5)minutesofmainburneroperation.Usetheameofa

matchorcandle,orsmokefromacigarette,cigar,orpipe.

f) Afterithasbeendeterminedthateachapplianceremainingconnectedtothecommonventingsystemproperlyvents

whentestedasoutlinedabove,returndoors,windows,exhaustfans,replacedampersandanyothergas-burning

appliancestotheirpreviousconditionofuse.

g) Anyimproperoperationofthecommonventingsystemshouldbecorrectedsotheinstallationconformswiththe

NationalFuelGasCode,ANSIZ223.1.Whenresizinganyportionofthecommonventingsystem,thecommon

ventingsystemshouldberesizedtoapproachtheminimumsizeasdeterminedusingtheappropriatetablesinthe

NationalFuelGasCode,ANSIZ223.1.