A.O. Smith 197835-001 Instruction Manual - page 16
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sedIMent traps
Asedimenttrapshouldbeinstalledasclosetothegasinletofthewater
heateraspracticalatthetimeofwaterheaterinstallation.Thesediment
trapshouldbeeitherateefittingwithacappednippleinthebottom
outletorotherdevicerecognizedasaneffectivesedimenttrap.
Contaminantsinthegaslinesmaycauseimproperoperationofthe
gascontrolvalvethatmayresultinfireorexplosion.Beforeattaching
thegaslinebesurethatallgaspipeiscleanontheinside.Totrapany
dirtorforeignmaterialinthegassupplyline,adripleg(sometimes
calledasedimenttrap)mustbeincorporatedinthepiping.Thedrip
legmustbereadilyaccessible.Installinaccordancewiththe“Gas
Piping” section. Refer to the current edition of the National Fuel
GasCode(ANSIZ223.1/NFPA54)ortheNaturalGasandPropane
InstallationCode(CAN/CSAB149.1).
fIllInG the water heater
Neverusethiswaterheaterunlessitiscompletelyfullofwater.Toprevent
damagetothetank,thetankmustbefilledwithwater.Watermustflow
fromthehotwaterfaucetbeforeturning“ON”gastothewaterheater.
Tofillthewaterheaterwithwater:
1. Closethewaterheaterdrainvalvebyturningthehandletotheright
(clockwise).Thedrainvalveisonthelowerfrontofthewaterheater.
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. Toinsurecompletefillingofthetank,allowairtoexitbyopeningthe
nearesthotwaterfaucet.Allowwatertorununtilaconstantflowis
obtained.Thiswillletairoutofthewaterheaterandthepiping.
4. Checkallwaterpipingandconnectionsforleaks.Repairasneeded.
ventInG
vent pIpe terMInatIon
Thefirststepistodeterminewheretheventpipewillterminate.
SeeFigures19,20,and21.Theventmayterminatethrougha
sidewallasshowninFigure19orthroughtheroofasshownin
Figures20and21.
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).
Instructionsonproperinstallationthroughasidewallareprovided
inFigures15A,15B,15C,and15D.
Plan the vent system layout so that proper clearances are
maintainedfromplumbingandwiring.
Vent pipes serving power vented appliances are classified by
buildingcodesas“ventconnectors”.Requiredclearancesfrom
combustible materials must be provided in accordance with
informationinthismanualunderFACTS TO CONSIDER ABOUT
LOCATION and INSTALLING THE WATER HEATER, and with
the National Fuel Gas Code and local codes.