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


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SEDIMENT TRAPS
Asedimenttrapshouldbeinstalledasclosetothegasinletofthewater
heateraspracticalatthetimeofwaterheaterinstallation.Thesediment
trapshouldbeeitherateettingwithacappednippleinthebottom
outletorotherdevicerecognizedasaneffectivesedimenttrap.
Contaminantsinthegaslinesmaycauseimproperoperationofthe
gascontrolvalvethatmayresultinreorexplosion.Beforeattaching
thegaslinebesurethatallgaspipeiscleanontheinside.Totrapany
dirtorforeignmaterialinthegassupplyline,adripleg(sometimes
calledasedimenttrap)mustbeincorporatedinthepiping.Thedrip
legmustbereadilyaccessible.Installinaccordancewiththe“Gas
Piping”section.RefertothecurrenteditionoftheNationalFuel
GasCode(ANSIZ223.1/NFPA54)ortheNaturalGasandPropane
InstallationCode(CAN/CSAB149.1).
FILLING THE WATER HEATER
Neverusethiswaterheaterunlessitiscompletelyfullofwater.Toprevent
damagetothetank,thetankmustbelledwithwater.Watermustow
fromthehotwaterfaucetbeforeturning“ON”gastothewaterheater.
Tollthewaterheaterwithwater:
1. Closethewaterheaterdrainvalvebyturningthehandletotheright
(clockwise).Thedrainvalveisonthelowerfrontofthewaterheater.
2.Open the cold watersupplyvalve to the waterheater.
NOTE: The cold water supply valve must be left open when
the water heater is in use.
3. Toinsurecompletellingofthetank,allowairtoexitbyopeningthe
nearesthotwaterfaucet.Allowwatertorununtilaconstantowis
obtained.Thiswillletairoutofthewaterheaterandthepiping.
4. Checkallwaterpipingandconnectionsforleaks.Repairasneeded.
VENTING
VENT PIPE TERMINATION
Thefirststepistodeterminewheretheventpipewillterminate.
SeeFigures19,20,and21.Theventmayterminatethrougha
sidewallasshowninFigure19orthroughtheroofasshownin
Figures20and21.
The vent system must terminatesothat proper clearances
are maintained as cited in local codes or the current
editionoftheNationalFuelGasCode,(ANSIZ223.1,12.9.1
through12.9.4)ortheNaturalGasandPropaneInstallation
Code(CAN/CSA-B149.1).
Instructionsonproperinstallationthroughasidewallareprovided
inFigures15A,15B,15C,and15D.
Plantheventsystemlayoutsothatproperclearancesare
maintainedfromplumbingandwiring.
Ventpipesservingpowerventedappliancesareclassifiedby
buildingcodesas“ventconnectors”.Requiredclearancesfrom
combustiblematerialsmustbeprovidedinaccordancewith
informationinthismanualunderFACTS TO CONSIDER ABOUT
LOCATION and INSTALLING THE WATER HEATER, and with
the National Fuel Gas Code and local codes.
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