A.O. Smith 197835-001 Water Heater User Manual


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inanalcoveorcloset,theentireoormustbecoveredbythepanel.
Failuretoheedthiswarningmayresultinarehazard.
Minimumclearancesbetweenthewaterheaterandcombustible
constructionare0inchatthesidesandrear,5.5”(14.0cm)fromthefront
and12”(30.5cm)fromthetop.(Standardclearance.)Ifclearances
statedontheheaterdifferfromstandardclearances,installwater
heateraccordingtoclearancesstatedontheheater.
Adequateclearance24”(61.0cm)forservicingthisapplianceshouldbe
consideredbeforeinstallation,suchaschangingtheanodes,etc.
Aminimumclearanceof5.5”(14.0cm)mustbeallowedforaccessto
replaceablepartssuchasthethermostats,drainvalveandreliefvalve.
Wheninstallingtheheater,considerationmustbegiventoproper
location.Locationselectedshouldbeasclosetothewallaspracticable
andascentralizedwiththewaterpipingsystemaspossible.
FIGURE 4.
INSULATION BLANKETS
Insulationblanketsareavailabletothegeneralpublicforexternaluse
ongaswaterheatersbutarenotnecessarywiththeseproducts.The
purposeofaninsulationblanketistoreducethestandbyheatloss
encounteredwithstoragetankheaters.Yourwaterheatermeetsor
exceedstheEnergyPolicyActstandardswithrespecttoinsulationand
standbylossrequirements,makinganinsulationblanketunnecessary.
Shouldyouchoosetoapplyaninsulationblankettothisheater,you
shouldfollowtheseinstructions(Foridenticationofcomponents
mentionedbelow,seeFigure1).Failuretofollowtheseinstructions
canrestricttheairowrequiredforpropercombustion,potentially
resultinginre,asphyxiation,seriouspersonalinjuryordeath.
• Do notapplyinsulationtothetopofthewaterheater,asthiswill
interferewithsafeoperationoftheblowerassembly.
• Do notcovertheouterdoor,thermostatortemperature&pressure
relief valve.
• Do notallowinsulationtocomewithin2”(5.1cm)oftheoorto
preventblockageofcombustionairowtotheburner.
• Do notcovertheinstructionmanual.Keepitonthesideofthe
water heater or nearby for future reference.
• Doobtainnewwarningandinstructionlabelsfromthemanufacturer
forplacementontheblanketdirectlyovertheexistinglabels.
• Doinspecttheinsulationblanketfrequentlytomakecertainit
doesnotsag,therebyobstructingcombustionairow.
COMBUSTION AIR AND VENTILATION
Agaswaterheatercannotoperateproperlywithoutthecorrectamount
ofairforcombustion.Donotinstallinaconnedareasuchasacloset,
unlessyouprovideairasshowninthe“FactstoConsiderAbout
Location”section.Neverobstructtheowofventilationair.Ifyouhave
anydoubtsorquestionsatall,callyourgassupplier.Failuretoprovide
theproperamountofcombustionaircanresultinareorexplosion
andcausedeath,seriousbodilyinjury,orpropertydamage.
FIGURE 5.
Ifthiswaterheaterwillbeusedinbeautyshops,barbershops,cleaning
establishments,orself-servicelaundrieswithdrycleaningequipment,
itisimperativethatthewaterheater(s)beinstalleddirectventsothat
allairforcombustionandventilationistakenfromoutdoors.
Propellantsofaerosolspraysandvolatilecompounds,(cleaners,
chlorinebasedchemicals,refrigerants,etc.)inadditiontobeinghighly
ammableinmanycases,willalsoreacttoformcorrosivehydrochloric
acidwhenexposedtothecombustionproductsofthewaterheater.
Theresultscanbehazardous,andalsocauseproductfailure.
APPLIANCES IN UNCONFINED SPACES
UNCONFINED SPACEisspacewhosevolumeisnotlessthan
50cubicfeetper1,000Btuperhour(4.8cubicmetersperkW)ofthe
aggregateinputratingofallappliancesinstalledinthatspace.Rooms
communicatingdirectlywiththespaceinwhichtheappliancesare
installed,throughopeningsnotfurnishedwithdoors,areconsidered
apartoftheunconnedspace.
Inunconnedspacesinbuildings,inltrationmaybeadequateto
provideairforcombustion,ventilationanddilutionofuegases.
However, in buildingsoftightconstruction(forexample,weather
stripping,heavilyinsulated,caulked,vaporbarrier,etc.),additionalair
mayneedtobeprovidedusingthemethodsdescribedin“Appliances
inConnedSpace”thatfollows.”
APPLIANCES IN CONFINED SPACES
CONFINED SPACEisaspacewhosevolumeislessthan50cubic
feetper1,000Btuperhour(4.8cmperkW)oftheaggregateinput
ratingofallappliancesinstalledinthatspace.
Whendrawingcombustionairfrominsideaconventionallyconstructed
buildingtoaconfinedspace,suchaspaceshouldbeprovided
withtwopermanentopenings.ONEWITHIN12INCHES(30cm)
OFTHEENCLOSURETOPANDONEWITHIN12INCHES(30
cm)OFTHEENCLOSUREBOTTOM.Eachopeningshouldhave
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