A.O. Smith 197835-001 Instruction Manual - page 11
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inanalcoveorcloset,theentirefloormustbecoveredbythepanel.
Failuretoheedthiswarningmayresultinafirehazard.
Minimum clearances between the water heater and combustible
constructionare0inchatthesidesandrear,5.5”(14.0cm)fromthefront
and12”(30.5cm)fromthetop.(Standardclearance.)Ifclearances
stated on the heater differ from standard clearances, install water
heateraccordingtoclearancesstatedontheheater.
Adequateclearance24”(61.0cm)forservicingthisapplianceshouldbe
consideredbeforeinstallation,suchaschangingtheanodes,etc.
Aminimumclearanceof5.5”(14.0cm)mustbeallowedforaccessto
replaceablepartssuchasthethermostats,drainvalveandreliefvalve.
When installing the heater, consideration must be given to proper
location.Locationselectedshouldbeasclosetothewallaspracticable
andascentralizedwiththewaterpipingsystemaspossible.
FIGURE 4.
InsulatIon BlanKets
Insulationblanketsareavailabletothegeneralpublicforexternaluse
ongaswaterheatersbutarenotnecessarywiththeseproducts.The
purposeofaninsulationblanketistoreducethestandbyheatloss
encounteredwithstoragetankheaters.Yourwaterheatermeetsor
exceedstheEnergyPolicyActstandardswithrespecttoinsulationand
standbylossrequirements,makinganinsulationblanketunnecessary.
Shouldyouchoosetoapplyaninsulationblankettothisheater,you
should follow these instructions (For identification of components
mentionedbelow,seeFigure1).Failuretofollowtheseinstructions
canrestricttheairflowrequiredforpropercombustion,potentially
resultinginfire,asphyxiation,seriouspersonalinjuryordeath.
• Do notapplyinsulationtothetopofthewaterheater,asthiswill
interferewithsafeoperationoftheblowerassembly.
• Do notcovertheouterdoor,thermostatortemperature&pressure
relief valve.
• Do notallowinsulationtocomewithin2”(5.1cm)ofthefloorto
preventblockageofcombustionairflowtotheburner.
• Do notcovertheinstructionmanual.Keepitonthesideofthe
water heater or nearby for future reference.
• Doobtainnewwarningandinstructionlabelsfromthemanufacturer
forplacementontheblanketdirectlyovertheexistinglabels.
• Do inspect the insulation blanket frequently to make certain it
doesnotsag,therebyobstructingcombustionairflow.
coMBustIon aIr and ventIlatIon
Agaswaterheatercannotoperateproperlywithoutthecorrectamount
ofairforcombustion.Donotinstallinaconfinedareasuchasacloset,
unless you provide air as shown in the “Facts to ConsiderAbout
Location”section.Neverobstructtheflowofventilationair.Ifyouhave
anydoubtsorquestionsatall,callyourgassupplier.Failuretoprovide
theproperamountofcombustionaircanresultinafireorexplosion
andcausedeath,seriousbodilyinjury,orpropertydamage.
FIGURE 5.
Ifthiswaterheaterwillbeusedinbeautyshops,barbershops,cleaning
establishments,orself-servicelaundrieswithdrycleaningequipment,
itisimperativethatthewaterheater(s)beinstalleddirectventsothat
allairforcombustionandventilationistakenfromoutdoors.
Propellants of aerosol sprays and volatile compounds, (cleaners,
chlorinebasedchemicals,refrigerants,etc.)inadditiontobeinghighly
flammableinmanycases,willalsoreacttoformcorrosivehydrochloric
acidwhenexposedtothecombustionproductsofthewaterheater.
Theresultscanbehazardous,andalsocauseproductfailure.
applIances In unconfIned spaces
unconfIned space is space whose volume is not less than
50cubicfeetper1,000Btuperhour(4.8cubicmetersperkW)ofthe
aggregateinputratingofallappliancesinstalledinthatspace.Rooms
communicatingdirectlywiththespaceinwhichtheappliancesare
installed,throughopeningsnotfurnishedwithdoors,areconsidered
apartoftheunconfinedspace.
In unconfined spaces in buildings, infiltration may be adequate to
provide air for combustion, ventilation and dilution of flue gases.
However, in buildings of tight construction (for example, weather
stripping,heavilyinsulated,caulked,vaporbarrier,etc.),additionalair
mayneedtobeprovidedusingthemethodsdescribedin“Appliances
inConfinedSpace”thatfollows.”
applIances In confIned spaces
confIned spaceisaspacewhosevolumeislessthan50cubic
feetper1,000Btuperhour(4.8cmperkW)oftheaggregateinput
ratingofallappliancesinstalledinthatspace.
Whendrawingcombustionairfrominsideaconventionallyconstructed
buildingtoaconfinedspace,suchaspaceshouldbeprovided
withtwopermanentopenings.ONEWITHIN12INCHES(30cm)
OFTHEENCLOSURETOPANDONEWITHIN12INCHES(30
cm)OFTHEENCLOSUREBOTTOM.Eachopeningshouldhave