ultra low nox commercial gas water heaters

1

Instruction Manual

PRINTED 1112 324258-000

Keep thIs Manual In the pocKet on heater for future reference whenever MaIntenance adjustMent or servIce Is requIred.

ultra low noX coMMercIal Gas water heaters

• for Your safety •AN ODORANT IS ADDED TO THE GAS USED

BY THIS WATER HEATER.

Models Bl-100series 100

InstallatIon - operatIon - servIce - MaIntenance - lIMIted warrantY

PlAcE THESE INSTRUcTIONS ADjAcENT TO HEATER AND NOTIfY OWNER TO kEEP fOR fUTURE REfERENcE.

Read and understand this instructionmanual and the safety messagesherein before installing, operating orservicing this water heater.

Failure to follow these instructions andsafety messages could result in deathor serious injury.

This manual must remain with thewater heater.

500 Tennessee Waltz ParkwayAshland city, TN 37015

Low Lead Content

WARNING: If the information in theseinstructions is not followed exactly, a fireor explosion may result causing propertydamage, personal injury or death.

Do not store or use gasoline or otherflammable vapors and liquids in thevicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS:Do not try to light any appliance.Do not touch any electrical switch; donot use any phone in your building.Immediately call your gas supplierfrom a neighbor’s phone. Follow thegas supplier’s instructions.

If you cannot reach your gas supplier,call the fire department.

Installation and service must beperformed by a qualified installer,service agency or the gas supplier.

••

•

•

2

SAfE INSTAllATION, USE AND SERVIcE...................... 3

APPROVAlS ......................................................................3

GENERAl SAfETY INfORMATION .................................. 4

INTRODUcTION ................................................................5

Abbreviations Used .....................................................5

QualifiedInstallerorServiceAgency........................... 5

PreparingfortheNewInstallation ............................... 5

INSTAllATION cONSIDERATIONS ............................. 6-9

RoughInDimensions ..................................................6

Thermometers .............................................................7

FactstoConsiderAboutLocation ............................... 7

HighAltitude ................................................................8

Clearances ..................................................................8

Insulation Blankets ......................................................9

Hard Water ..................................................................9

CirculationPumps .......................................................9

INSTAllATION REqUIREMENTS .................................. 10

GasSupplySystems .................................................10

GasPressureRequirements ..................................... 10

SupplyGasRegulator ...............................................10

MixingValves ............................................................10

WaterPiping .............................................................. 11

ClosedWaterSystems .............................................. 11

ThermalExpansion ................................................... 11

Temperature-PressureReliefValve ......................... 11

FillingtheWaterHeater ............................................. 12

AirRequirements.......................................................12

UnconfinedSpace .....................................................13

ConfinedSpace .........................................................13

FreshAirOpeningsforConfinedSpaces .................. 13

OutdoorAirThroughTwoOpenings .......................... 13

OutdoorAirThroughOneOpening ........................... 13

OutdoorAirThroughTwoHorizontalDucts ............... 14

OutdoorAirThroughTwoVerticalDucts ................... 14

AirFromOtherIndoorSpaces .................................. 14

Venting ......................................................................14

GasPiping .................................................................16

SedimentTraps .........................................................17

lIGHTING & OPERATING INSTRUcTIONS ................... 18

TEMPERATURE REGUlATION ...................................... 19

fOR YOUR INfORMATION .............................................19

Start Up conditions ...................................................19

Operational conditions ..............................................20

PERIODIc MAINTENANcE .............................................21

VentingSystemInspection ........................................ 21

BurnerInspection ......................................................21

BurnerCleaning ........................................................21

Housekeeping ...........................................................21

AnodeRodInspection ...............................................22

Temperature-PressureReliefValveTest ................... 22

REcOMMENDED PROcEDURE fOR PERIODIc

REMOVAl Of lIME DEPOSITS fROM TANk

TYPE cOMMERcIAl WATER HEATERS ........................ 22

DelimingSolvents......................................................23

TankCleanoutProcedure .......................................... 23

DelimingUsingFlo-JugMethod ................................ 23

DrainingandFlushing ...............................................24

Service ......................................................................24

lEAkAGE cHEckPOINTS ..............................................25

TROUBlESHOOTING GUIDElINES ............................... 26

WATER PIPING DIAGRAMS .......................................27-32

NOTES .............................................................................33

WARRANTY .....................................................................35

taBle of contents

3

safe InstallatIon, use and servIce

Theproperinstallation,useandservicingofthiswaterheaterisextremelyimportanttoyoursafetyandthesafetyofothers.Manysafety-relatedmessagesandinstructionshavebeenprovidedinthismanualandonyourownwaterheatertowarnyouandothersofapotentialinjuryhazard.Readandobeyallsafetymessagesandinstructionsthroughoutthismanual.Itisveryimportantthatthemeaningofeachsafetymessageisunderstoodbyyouandotherswhoinstall,use,orservicethiswaterheater.

Allsafetymessageswillgenerallytellyouaboutthetypeofhazard,whatcanhappenifyoudonotfollowthesafetymessage,andhowtoavoidtheriskofinjury.TheCaliforniaSafeDrinkingWaterandToxicEnforcementActrequirestheGovernorofCaliforniatopublishalistofsubstancesknown to theStateofCalifornia tocausecancer,birthdefects,orother reproductiveharm,and requiresbusinesses towarnofpotentialexposuretosuchsubstances.warnInG: ThisproductcontainsachemicalknowntotheStateofCaliforniatocausecancer,birthdefects,orotherreproductiveharm.ThisappliancecancauselowlevelexposuretosomeofthesubstanceslistedintheAct.

DANGER

WARNING

CAUTION

CAUTION

DANGER indicates an imminentlyhazardous situation which, if not avoided,will result in injury or death.

This is the safety alert symbol. It is used to alert you topotential personal injury hazards. Obey all safetymessages that follow this symbol to avoid possibleinjury or death.

WARNING indicates a potentially hazardoussituation which, if not avoided, could resultin injury or death.

CAUTION indicates a potentially hazardoussituation which, if not avoided, could result inminor or moderate injury.

CAUTION used without the safety alertsymbol indicates a potentially hazardoussituation which, if not avoided, could result inproperty damage.

approvals

Low Lead Content

4

General safetY InforMatIon

5

ThankYouforpurchasingthiswaterheater.Properlyinstalledandmaintained,itshouldgiveyouyearsoftroublefreeservice.

aBBrevIatIons used

AbbreviationsFoundInThisInstructionManual:• UL-UnderwritersLaboratoriesInc.• ANSI-AmericanNationalStandardsInstitute• NFPA-NationalFireProtectionAssociation• ASME-AmericanSocietyofMechanicalEngineers• AHRI-Air-Conditioning,HeatingandRefrigerationInstitute• CAN-Canada• EPACT-EnergyPolicyAct• CSA-CanadianStandardsAssociation

This gas-firedwater heater is design certified byUnderwritersLaboratoriesInc.underAmericanNationalStandard/CSAStandard forGasWaterHeatersANSIZ21.10.3•CSA4.3(currentedition).

qualIfIed Installer or servIce aGencY

InstallationandserviceofthiswaterheaterrequiresabilityequivalenttothatofaQualifiedAgency(asdefinedbyANSIbelow)inthefieldinvolved. Installation skills suchas plumbing, air supply, venting,gassupplyandelectricalsupplyarerequiredinadditiontoelectricaltestingskillswhenperformingservice.

ANSIZ223.12006Sec.3.3.83:“QualifiedAgency”-“Anyindividual,firm, corporation or company that either in person or through arepresentativeisengagedinandisresponsiblefor(a)theinstallation,testingorreplacementofgaspipingor(b)theconnection,installation,testing, repair or servicing of appliances and equipment; that isexperiencedinsuchwork;thatisfamiliarwithallprecautionsrequired;and that has compliedwith all the requirements of the authorityhavingjurisdiction.”

Ifyouarenotqualified(asdefinedbyANSIabove)andlicensedorcertifiedasrequiredbytheauthorityhavingjurisdictiontoperformagiventaskdonotattempttoperformanyoftheproceduresdescribedin thismanual. If youdonotunderstand the instructionsgiven inthismanualdonotattempt toperformanyproceduresoutlined inthismanual.

preparInG for the InstallatIon

1. Read the “GeneralSafety” section, page4of thismanualfirstandthentheentiremanualcarefully.Ifyoudon’tfollowthesafetyrules,thewaterheaterwillnotoperateproperly.

ItcouldcauseDEATH,SERIOUSBODILYINJURYAND/ORPROPERTY DAMAGE.

This manual contains instructions for the installation,operation,andmaintenanceofthegas-firedwaterheater.Italsocontainswarningsthroughoutthemanualthatyoumustreadandbeawareof.Allwarningsandallinstructionsareessentialtotheproperoperationofthewaterheaterandyoursafety.Sincewecannotputeverythingonthefirstfewpages,READ THE ENTIRE MANUAl BEfORE ATTEMPTING TO INSTAll OR OPERATE THE WATER HEATER.

2.The installationmust conformwith these instructions andthelocalcodeauthorityhavingjurisdiction.Intheabsenceoflocalcodes,theinstallationmustcomplywiththecurrenteditions of the National Fuel Gas Code, ANSI Z223.1/NFPA54orCAN/CSA-B149.1theNaturalGasandPropaneInstallation Code. All documents are available from theCanadianStandardsAssociation,8501EastPleasantValleyRoad, Cleveland, OH 44131. NFPA documents are alsoavailable from theNational Fire Protection Association, 1BatterymarchPark,Quincy,MA02269.

3.If after reading thismanual youhaveanyquestionsordonotunderstandanyportionoftheinstructions,callthelocalgasutilityorthemanufacturerwhosenameappearsontheratingplate.

4.Carefully plan the place where you are going to put thewater heater. Correct combustion, vent action, and ventpipeinstallationareveryimportantinpreventingdeathfrompossiblecarbonmonoxidepoisoningandfires,seeFigures3 and 7.

Examinethelocationtoensurethewaterheatercomplieswiththe“LocatingtheNewWaterHeater”sectioninthismanual.

5.ForCaliforniainstallationthiswaterheatermustbebraced,anchored, or strapped to avoid falling or moving duringan earthquake. See instructions for correct installationprocedures. Instructionsmaybeobtained fromCaliforniaOffice of the State Architect, 400 P Street, Sacramento, cA 95814.

6.MassachusettsCoderequiresthiswaterheatertobeinstalledin accordance withMassachusetts 248-CMR 2.00: StatePlumbingCodeand248-CMR5.00.

7.Complieswith SCAQMD rule #1146.2 and districts havingequivalentNOxrequirements.

IntroductIon

6

rouGh In dIMensIons

InstallatIon consIderatIons

fIGure 1.

KHOT WATER

OUTLET

DRAINVALVE

HOT COLD

TOP VIEW

L

GAS INLET

INSTALL IN ACCORDANCE WITH LOCAL CODES

DRAIN VALVE

KCOLD WATER

INLETF

H

J

B

D

A

E

M

C

TEMPERATUREAND PRESSURERELIEF VALVE

C

recoverY ratInGs

dIMensIons

Model units a B c d e f G h j K l M BL-100 Inches 701/2 661/2 3015/16 273/4 153/16 4 153/4 16 11/4 11/4 1/2 1115/16 Natural cM 179.07 168.9 78.59 70.5 38.6 10.2 40.0 40.6 3.2 NPT NPT 30.3

taBle 1.

Bl-100

Input rate recovery in us Gallons/hr or liters/hr at Indicated temperature rise in fahrenheit or celsius

75,100BTU/H °f 30 40 50 60 70 80 90 100 110 120 130 140GPH 246 184 148 123 105 92 82 74 67 62 57 53

22 kW°c 17 22 28 33 39 44 50 56 61 67 72 78

lPH 927 695 557 462 397 347 309 278 252 233 214 198

Recoveryratingsbasedon81%thermalefficiency.

7

therMoMeters (not supplied)Thermometersshouldbeobtainedandfieldinstalled.Thermometersareinstalledinthesystemasameansofdetectingthetemperatureoftheoutletwatersupply.

ThisWaterHeaterhasbeendesigncertifiedascomplyingwithANSIZ21.10.3-CSA4.3currenteditionforwaterheatersandisconsideredsuitablefor:

Water (Potable) Heating and Space Heating:All models areconsideredsuitableforwater(potable)heatingandspaceheating.

HOTTERWATERCANSCALD:Waterheatersareintendedtoproducehotwater.Waterheatedtoatemperaturewhichwillsatisfyspaceheating,clotheswashing,dishwashing,andothersanitizingneedscanscaldandpermanentlyinjureyouuponcontact.Somepeoplearemorelikelytobepermanentlyinjuredbyhotwaterthanothers.Theseincludetheelderly,children,theinfirm,orphysically/mentallyhandicapped.Ifanyoneusinghotwaterinyourhomefitsintooneofthesegroupsorifthereisalocalcoderequiringacertaintemperaturewateratthehotwatertap,thenyoumusttakespecialprecautions.Inadditiontousingthelowestpossible temperature setting that satisfies your hotwater needs,ameanssuchasa*MixingValveshouldbeusedatthehotwatertapsusedbythesepeopleoratthewaterheater.Mixingvalvesareavailableatplumbingsupplyorhardwarestores.Consultaqualifiedinstaller or service agency. Followmixing valvemanufacturer’sinstructions for installationof valves.Beforechanging the factorysettingonthethermostat,readthe“TemperatureRegulation”sectioninthismanual,seeFigures17and18.

facts to consIder aBout the locatIon

Carefully choose an indoor location for the newwater heater,because the placement is a very important consideration forthe safety of the occupants in the building and for themosteconomical use of the water heater. This water heater is notforuseinmanufactured(mobile)homesoroutdoorinstallation.

Whetherreplacinganoldwaterheaterorputtingthewaterheaterinanewlocation,thefollowingcriticalpointsmustbeobserved:

1.Selectalocationindoorsascloseaspracticaltothegasventorchimneytowhichthewaterheaterventisgoingtobeconnected,andascentralizedwiththewaterpipingsystemaspossible.

2.Selected location must provide adequate clearances forservicingandproperoperationofthewaterheater.

Installationofwaterheatermustbeaccomplishedinsuchamannerthatifthetankoranyconnectionsshouldleak,flowwillnotcausedamageto

thestructure.Forthisreason,itisnotadvisabletoinstallwaterheaterinanatticorupperfloor.Whensuchlocationscannotbeavoided,asuitablemetaldrainpanshouldbeinstalledunderthewaterheater.MetalDrainpansareavailableatyourlocalhardwarestore.Suchametaldrainpanmusthaveaminimumlengthandwidthofatleast2”(51mm)greaterthanwaterheaterdimensionsandmustbepipedtoanadequatedrain.Thepanmustnotrestrictcombustionairflow.

Waterheaterlifedependsuponwaterquality,waterpressureandtheenvironmentinwhichthewaterheaterisinstalled.Waterheatersaresometimesinstalledinlocationswhereleakagemayresultinpropertydamage,evenwiththeuseofadrainpanpipedtoadrain.However,unanticipateddamagecanbereducedorpreventedbyaleakdetectororwatershut-offdeviceusedinconjunctionwithapipeddrainpan.Thesedevicesareavailablefromsomeplumbingsupplywholesalersandretailers,anddetectandreacttoleakageinvariousways:

• Sensorsmountedinthedrainpanthattriggeranalarmorturnofftheincomingwatertothewaterheaterwhenleakageisdetected.

• Sensorsmountedinthedrainpanthatturnoffthewatersupplytotheentirehomewhenwaterisdetectedinthedrainpan.

• Watersupplyshut-offdevicesthatactivatebasedonthewaterpressuredifferentialbetweenthecoldwaterandhotwaterpipesconnectedtothewaterheater.

• Devicesthatwillturnoffthegassupplytoagaswaterheaterwhileatthesametimeshuttingoffitswatersupply.

INSTAllATIONS IN AREAS WHERE flAMMABlE lIqUIDS (VAPORS)ARELIKELYTOBEPRESENTORSTORED(GARAGES,STORAGEANDUTILITYAREAS,ETC.):Flammableliquids(suchasgasoline,solvents,propane[LPorbutane,etc.]andothersubstancessuchasadhesives,etc.)emitflammablevaporswhichcanbeignitedbyagaswaterheater’spilotlightormainburner.Theresultingflashbackandfirecancausedeathorseriousburnstoanyoneinthearea,aswellaspropertydamage.Ifinstallationinsuchareasisyouronlyoption,theninstallationmustbeaccomplishedinawaythatthepilotflameandmainburnerflameareelevatedfromflooratleast18inches.Whilethismayreducechancesofflammablevapors,fromafloorspillbeingignited,gasolineandotherflammablesubstancesshouldneverbestoredor

8

usedinthesameroomorareacontainingagaswaterheaterorotheropenflameorsparkproducingappliance.NOTE:Flammablevaporsmaybedrawnbyaircurrentsfromotherareasofthestructuretotheappliance.Also,thewaterheatermustbelocatedand/orprotectedsoit isnotsubjecttophysicaldamagebyamovingvehicle.

Thiswaterheatermustnotbeinstalleddirectlyoncarpeting.Carpetingmustbeprotectedbymetalorwoodpanelbeneaththewaterheaterextendingbeyondthefullwidthanddepthofthewaterheaterbyatleast3”(76.2mm)inanydirection,orifthewaterheaterisinstalledinanalcoveorcloset,theentirefloormustbecoveredbythepanel.Failuretoheedthiswarningmayresultinafirehazard.

hIGh altItude

Waterheaterscoveredinthismanualhavebeentestedandapprovedfor installationatelevationsup to7,700 feet (2,347m)abovesealevel.Forinstallationabove7,700feet(2,347m),thewaterheater’sBtuinputshouldbereducedattherateof4percentforeach1,000feet(305m)abovesealevelwhichrequiresreplacementoftheburnerorificeinaccordancewiththeNationalFuelGasCodeANSIZ223.1/NFPA54ortheNaturalGasandPropaneInstallationCodeCAN/CSAB149.1.Contactyourlocalgassupplierforfurtherinformation.

Failuretoreplacethestandardorificewiththeproperhighaltitudeorificewhen installed at elevations above 7,700 feet (2,347m)couldresultinimproperandinefficientoperationofthewaterheater,producingcarbonmonoxidegasinexcessofthesafelimits.Thiscouldresultinseriousinjuryordeath.Contactyourlocalgassupplierforanyspecificchangesthatmayberequiredinyourarea.

clearances

Minimumclearancesbetween thewater heater and combustibleconstructionare0inchatthesidesandrear,4”(102mm)atthefront,and6”(153mm)fromtheventpipe.Clearancefromthetopofthejacketis12”(305mm)onmostmodels.

fIGure 2.

Agaswater heater cannot operate properlywithout the correctamountofairforcombustion.Donotinstallinaconfinedareasuchasacloset,unlessyouprovideairasshowninthe“LocatingTheNewWaterHeater”section.Neverobstructtheflowofventilationair.Ifyouhaveanydoubtsorquestionsatall,callyourgassupplier.Failuretoprovidetheproperamountofcombustionaircanresultin a fire or explosion and cause death, serious bodily injury, orpropertydamage.

fIGure 3.

Ifthiswaterheaterwillbeusedinbeautyshops,barbershops,cleaning establishments, or self-service laundries with drycleaning equipment, it is imperative that thewater heater orwater heaters be installed so that combustionand ventilationairbetakenfromoutsidetheseareas.

Propellantsofaerosolspraysandvolatilecompounds,(cleaners,chlorinebasedchemicals,refrigerants,etc.)inadditiontobeinghighlyflammableinmanycases,willalsochangetocorrosivehydrochloricacidwhenexposedtothecombustionproductsofthewaterheater.Theresultscanbehazardous,andalsocauseproductfailure.

9

InsulatIon BlanKets

Do not obstruct water heater air intakewith insulating blanket.Gas and carbon monoxide detectorsare available.Install water heater in accordance withthe instruction manual.

Breathing carbon monoxide can cause brain damage ordeath. Always read and understand instruction manual.

Breathing Hazard - Carbon Monoxide Gas

Insulation blankets are available to the general public forexternal use on gas water heaters but are not necessarywith these products. The purpose of an insulation blanket isto reduce the standby heat loss encountered with storagetankheaters.Thewaterheaterscoveredbythismanualmeetor exceed the Energy Policy Act standards with respect toinsulation and standby heat loss requirements, making aninsulationblanketunnecessary.

Should you choose to apply an insulation blanket to thisheater,youshouldfollowtheseinstructions.SeetheFeaturesand Components section of this manual for identificationof components mentioned below. Failure to follow theseinstructions can restrict the air flow required for propercombustion,potentially resulting in fire,asphyxiation, seriouspersonalinjuryordeath.

• do notapplyinsulationtothetopofthewaterheater,asthiswillinterferewithsafeoperationofthedrafthood.

• do notcoverthethermostatortheTemperature-PressureReliefValve.

• do notallowtheinsulationtocomewithin2inches(5cm)ofthefloortopreventblockageofcombustionairflowto the burner.

• do notcovertheinstructionmanual.Keepitonthesideofthewaterheaterornearbyforfuturereference.

• doobtainnewwarningandinstructionlabelsfromthemanufacturerforplacementontheblanketdirectlyovertheexistinglabels.

• doinspecttheinsulationblanketfrequentlytomakecertainitdoesnotsag,therebyobstructingthecombustionairflow.

hard water

Wherehardwaterconditionsexist,watersofteningorthethresholdtype ofwater treatment is recommended. Thiswill protect thedishwashers,coffeeurns,waterheaters,waterpipingandotherequipment. See theMaintenance Section in thismanual forsedimentandlimescaleremovalprocedures.

cIrculatIon puMps

Acirculatingpumpisusedwhenasystemrequiresacirculatingloop or there is a storage tank used in conjunction with thewater heater. SeeWater Piping Diagrams in thismanual forinstallationlocationofcirculatingpumps.

SeetheCirculationPumpWiringDiagramsbelowforelectricalhookup information. Install in accordance with the currentedition of the National Electrical Code, NFPA 70 or theCanadianElectricalCode,CSAC22.1.

Allbronzeorstainlesssteelcirculatingpumpsarerecommendedforusedwithcommercialwaterheaters.

Somecirculatingpumpsaremanufacturedwithsealedbearingsanddonotrequirefurtherlubrication.Somecirculatingpumpsmustbeperiodicallyoiled.Refer to thepumpmanufacturer’sinstructionsforlubricationrequirements.

CIRCULATING PUMP WIRING DIAGRAMSTORAGE TANK OR BUILDING RECIRCULATION

FIELD SUPPLIED TEMPERATURE CONTROLINSTALLED IN THE STORAGE TANKOR CIRCULATING LOOP RETURN LINE

CIRCPUMP

MOTOR

L1 HOT

L2 NEUTRAL

120 VACPOWER

NOTE: USE SEPARATE 120 VAC POWERSUPPLY FOR PUMP CIRCUIT. DO NOTSHARE POWER WITH WATER HEATER AS THISMAY CAUSE ELECTRICAL LINE NOISE ANDLEAD TO ERRATIC CONTROL SYSTEMOPERATION.

fIGure 4.

CIRCULATING PUMP WIRING DIAGRAMDISHWASHER LOOP WITH TOGGLE SWITCH

FIELD SUPPLIED TEMPERATURECONTROL INSTALLED IN THECIRCULATING LOOP RETURN LINE

DISHWASHERTOGGLESWITCH

CIRCPUMP

MOTOR

L1 HOT

L2 NEUTRAL

120 VACPOWER

NOTE: USE SEPARATE 120 VAC POWERSUPPLY FOR PUMP CIRCUIT. DO NOTSHARE POWER WITH WATER HEATER AS THIS MAY CAUSE ELECTRICAL LINE NOISE AND LEAD TO ERRATIC CONTROL SYSTEMOPERATION.

fIGure 5.

10

Gas supplY sYsteMs

Lowpressure building gas supply systemsare definedas thosesystemsthatcannotunderanycircumstancesexceed14”W.C.(1/2PSIGauge).Thesesystemsdonotrequirepressureregulation.Measurementsshouldbetakentoinsurethatgaspressuresarestableandfallwithintherequirementsstatedonthewaterheaterratingplate.readingsshouldbe takenwithallgasburningequipmentoff (staticpressure)andwithallgasburningequipmentrunningatmaximumrate(dynamicpressure).Thegassupplypressuremustbestablewithin1.5”W.C.fromstatictodynamicpressuretoprovidegoodperformance.Pressuredropsthatexceed1.5”W.C.maycauseroughstarting,noisycombustionornuisanceoutages.Increasesorspikesinstaticpressureduringoffcyclesmaycausefailuretoigniteorinseverecasesdamagetoappliancegasvalves.Ifyourlowpressuresystemdoesnotmeettheserequirements,theinstallerisresponsibleforthecorrections.

HighPressurebuildingsupplysystemsusepressuresthatexceed14”W.C. (1/2PSIGauge).Thesesystemsmustusefieldsuppliedregulatorstolowerthegaspressuretolessthan14”W.C.(1/2PSIGauge).Appliancesrequiregasregulatorsthatareproperlysizedforthewaterheaterinputanddelivertheratingplatespecifiedpressures.Gassupplysystemswherepressureexceeds5PSIoftenrequiremultipleregulatorstoachievedesiredpressures.Systemsinexcessof5PSIbuildingpressureshouldbedesignedbygasdeliveryprofessionalsforbestperformance.Waterheatersconnectedtogassupplysystemsthatexceed14”W.C.(1/2PSIGauge)atanytimemustbeequippedwithagassupplyregulator.

Gas pressure requIreMents

Naturalgasmodelsrequireaminimumgassupplypressureof4.5”W.C.(1.12kPa).Propanegasmodelsrequireaminimumgassupplypressure of 11”W.C. (2.74 kPa).Theminimum supply pressureismeasuredwhile gas is flowing (dynamicpressure).The supplypressure(dynamic)shouldneverfallbelowthespecifiedminimumsupplypressure.Thesupplypressureshouldbemeasuredwithallgasfiredappliancesconnectedtothecommonmainfiringatfullcapacity.Ifthesupplypressuredropsmorethan1.5”W.C.(0.37kPa)asgasbeginstoflowtothewaterheaterthenthesupplygassystemincludingthegaslineand/orthegasregulatormayberestrictedorundersized.SeeSupplyGasregulatorsectionandGasPipingsectionofthismanual.Thegasvalveonallmodelshasamaximumgassupplypressurelimitof14”W.C.(3.48kPa)Themaximumsupplypressureismeasuredwhilegasisnotflowing(staticpressure).

supplY Gas reGulator

Themaximumallowablegassupplypressureforthiswaterheateris14.0inchesW.C.(3.48kPa).Installapositivelock-upgaspressureregulatorinthegassupplylineifinletgaspressurecanexceed14.0inchesW.C.(3.48kPa)atanytime.regulatorsmustbesized/usedaccordingtomanufacturer’sspecifications.Ifapositivelock-upregulatorisrequiredfollowtheseinstructions:

1. Positivelock-upgaspressureregulatorsmustberatedatorabove theinputBtu/hrratingofthewaterheatertheysupply.2. Positivelock-upgaspressureregulator(s)shouldbeinstalledno closerthan3feet(1meter)andnofartherthan8feet(2.4meters) ofequivalentlengthfromthewaterheater’sinletgasconnection.3. Afterinstallingthepositivelock-upgaspressureregulator(s)aninitial nominalsupplypressuresettingof7.0”W.C.whilethewaterheater isoperatingisrecommendedandwillgenerallyprovidegood waterheateroperation.Someadditionadjustmentmayberequired latertomaintainasteadygassupplypressure.4. When installingmultiplewater heaters in the samegas supply system it is recommended that individual positive lock-upgas pressureregulatorsbeinstalledateachunit.

MIXInG valves

Water temperature over 125°F (52°C)can cause severe burns instantlyresulting in severe injury or death.

Children, the elderly and the physically or mentally disabled are at highest risk for scald injury.

Feel water before bathing or showering.

Temperature limiting devices such asmixing valves must be installed when required by codes and to ensure safe temperatures at fixtures.

Waterheatedtoatemperaturewhichwillsatisfyclotheswashing,dishwashing,andothersanitizingneedscanscaldandcausepermanentinjuryuponcontact.Shortrepeatedheatingcyclescausedbysmallhotwaterusescancausetemperaturesatthepointofusetoexceedthewaterheater’stemperaturesettingbyupto20°F(11°C).Somepeoplearemorelikelytobepermanentlyinjuredbyhotwaterthanothers.These include theelderly, children, the infirmand thephysically/mentallydisabled.Table2 shows theapproximate time-to-burnrelationshipfornormaladultskin.Ifanyoneusinghotwaterprovidedby thewaterheaterbeing installed fits intooneof thesegroupsorifthereisalocalcodeorstatelawrequiringacertainwatertemperatureatthepointofuse,thenspecialprecautionsmustbetaken.In addition to using the lowest possible temperature setting thatsatisfiesdemandoftheapplicationaMixingValveshouldbeinstalledatthewaterheaterorathotwatertapstofurtherreducesystemwatertemperature.SeeFigure6.Mixing valves are available at plumbing supply stores.Consulta Qualified Installer or ServiceAgency. Followmixing valvemanufacturer’sinstructionsforinstallationofthevalves.

taBle 2.

Water Temperature°F

Timefor1stDegreeBurn

(LessSevereBurns)

TimeforPermanentBurns2nd&3rdDegree

(MostSevereBurns)

110 (normalshowertemp.)116 (painthreshold)116 35minutes 45minutes122 1minute 5minutes131 5seconds 25seconds140 2seconds 5seconds149 1second 2seconds154 instantaneous 1second

(U.S.GovernmentMemorandum,C.P.S.C.,PeterL.Armstrong,Sept.15,1978)

HOT WATEROUTLET

TO TANKINLET

CHECKVALVE

MIXINGVALVE

COLDWATERINLET

TEMPERED WATEROUTLET

12” TO 15”(30-38 cm)

CHECKVALVE

fIGure 6.

InstallatIon requIreMents

11

water pIpInG

water (potaBle) heatInG and space heatInG

Thiswaterheatershallnotbeconnectedtoanyheatingsystemsorcomponent(s)usedwithanon-potablewaterheatingappliance.

Allpipingcomponentsconnectedtothisunit forspaceheatingapplicationsshallbesuitableforusewithpotablewater.

Toxicchemicals,suchasthoseusedforboilertreatmentshallnotbeintroducedintothissystem.

Whenthesystemrequireswaterforspaceheatingattemperatureshigherthanrequiredfordomesticwaterpurposes,amixingvalvemustbeinstalled.PleaserefertoFigure2forsuggestedpipingarrangement.

Thesewaterheaterscannotbeusedinspaceheatingapplicationsonly.

closed water sYsteMs

Water supply systemsmay, because of code requirements orsuch conditions as high line pressure, among others, haveinstalled devices such as pressure reducing valves, checkvalves,andbackflowpreventers.Devicessuchasthesecausethewatersystemtobeaclosedsystem.

therMal eXpansIon

Aswaterisheated,itexpands(thermalexpansion).Inaclosedsystemthevolumeofwaterwillgrowwhenit isheated.Asthevolumeofwatergrowstherewillbeacorrespondingincreaseinwater pressure due to thermal expansion. Thermal expansioncancauseprematuretankfailure(leakage).Thistypeoffailureis not covered under the limited warranty. Thermal expansioncanalsocause intermittentTemperature-PressureReliefValveoperation: water discharged from the valve due to excessivepressurebuildup.Thisconditionisnotcoveredunderthelimitedwarranty.TheTemperature-PressureReliefValveisnotintendedfortheconstantreliefofthermalexpansion.

A properly sized thermal expansion tankmust be installed onall closed systems to control the harmful effects of thermalexpansion.Contacta localplumbingserviceagency tohaveathermalexpansiontankinstalled.

fIGure 7.

NOTE: To protect against untimely corrosion of hot and coldwaterfittings,it isstronglyrecommendedthatdi-electricunionsorcouplingsbeinstalledonthiswaterheaterwhenconnectedtocopperpipe.Figure 7 shows the typical attachment of the water piping tothewaterheater.Thewaterheater isequippedwith1.25”NPTthreadednipplewaterconnections.

teMperature-pressure relIef valve

Explosion HazardTemperature-Pressure Relief Valvemust comply with ANSI Z21.22-CSA 4.4 and ASME code.Properly sized temperature-pressure relief valve must beinstalled in opening provided.

Can result in overheating andexcessive tank pressure.Can cause serious injury or death.

This water heater is providedwith a properly rated/sized andcertified combinationTemperature-PressureRelief Valve (T&Pvalve)bythemanufacturer.Thevalveiscertifiedbyanationallyrecognizedtesting laboratory thatmaintainsperiodic inspectionof production of listed equipment ofmaterials asmeeting therequirements for Relief Valves for HotWater Supply Systems,ANSIZ21.22•CSA4.4,andthecoderequirementsofASME.If replaced, thenewT&Pvalvemustmeet the requirementsoflocalcodes,butnotlessthanacombinationTemperature-PressureReliefValve rated/sizedandcertifiedas indicated in theaboveparagraph.Thenewvalvemustbemarkedwithamaximumsetpressurenottoexceedthemarkedhydrostaticworkingpressureofthewaterheater(150psi=1,035kPa)andadischargecapacitynotlessthanthewaterheaterBtu/hrorkWinputrateasshownonthewaterheater’smodelratinglabel.

12

NOTE: Inaddition to the factory installedTemperature-PressureReliefValveon thewaterheater,each remotestorage tank thatmaybeinstalledandpipedtoawaterheatingappliancemustalsohave its own properly sized, rated and approvedTemperature-PressureReliefValveinstalled.CallthetollfreetechnicalsupportphonenumberlistedonthebackcoverofthismanualfortechnicalassistanceinsizingaTemperature-PressureReliefValveforremotestoragetanks.Forsafeoperationof thewaterheater, theTemperature-PressureReliefValvemustnotberemovedfromitsdesignatedopeningnorplugged.TheTemperature-PressureReliefValvemustbeinstalleddirectlyintothefittingofthewaterheaterdesignedforthereliefvalve.Installdischargepipingsothatanydischargewillexitthepipewithin6inches(15.2cm)aboveanadequatefloordrain,orexternaltothebuilding.Incoldclimatesitisrecommendedthatitbeterminatedatanadequatedraininsidethebuilding.Becertainthatnocontactismadewithanyliveelectricalpart.Thedischargeopeningmustnotbeblockedorreducedinsizeunderanycircumstances.Excessivelength,over30feet(9.14m),oruseofmorethanfourelbowscancauserestrictionandreducethedischargecapacityofthevalve.No valve or other obstruction is to be placed between theTemperature-PressureReliefValveandthetank.Donotconnectdischargepipingdirectlytothedrainunlessa6”(15.2cm)airgapisprovided.Topreventbodilyinjury,hazardtolife,orpropertydamage,the relief valvemustbeallowed todischargewater inadequatequantitiesshouldcircumstancesdemand.Ifthedischargepipeisnotconnectedtoadrainorothersuitablemeans,thewaterflowmaycausepropertydamage.

Water Damage Hazard• Temperature-Pressure Relief Valve discharge pipe must terminate at adequate drain.

CAUTION

t&p valve discharge pipe requirements:• Shallnotbesmallerinsizethantheoutletpipesizeofthevalve,orhaveanyreducingcouplingsorotherrestrictions.

• Shallnotbepluggedorblocked.• Shallnotbeexposedtofreezingtemperatures.• Shallbeofmateriallistedforhotwaterdistribution.• ShallbeinstalledsoastoallowcompletedrainageofboththeTemperature-PressureReliefValveandthedischargepipe.

• Mustterminateamaximumofsixinchesaboveafloordrainorexternaltobuilding.Incoldclimates,itisrecommendedthatdischargepipebeterminatedatanadequatedraininsidebuilding.

• Shallnothaveanyvalveorotherobstructionbetweenthereliefvalveandthedrain.

Burn hazard.

Hot water discharge.

Keep clear of Temperature-Pressure Relief Valvedischarge outlet.

TheTemperature-PressureReliefValvemustbemanuallyoperatedatleasttwiceayear.Cautionshouldbetakentoensurethat(1)nooneisinfrontoforaroundtheoutletoftheTemperature-PressureReliefValvedischargeline,and(2)thewatermanuallydischargedwill not cause any bodily injury or property damage becausethewatermaybeextremelyhot. Ifaftermanuallyoperating thevalve,itfailstocompletelyresetandcontinuestoreleasewater,immediatelyclosethecoldwaterinlettothewaterheater,followthedraininginstructionsinthismanual,andreplacetheTemperature-PressureReliefValvewithaproperlyrated/sizednewone.

NOTE:ThepurposeofaTemperature-PressureReliefValve istopreventexcessivetemperaturesandpressuresinthestoragetank.TheT&P valve is not intended for the constant relief of thermalexpansion.Aproperlysizedthermalexpansiontankmustbeinstalledon all closed systems to control thermal expansion, seeClosedWaterSystemsandThermalExpansiononpage11.If youdonot understand these instructionsor haveanyquestionsregardingtheTemperature-PressureReliefValvecallthetollfreenumberlistedonthebackcoverofthismanualfortechnicalassistance.

fIllInG the water heater

Neverusethiswaterheaterunless it iscompletely fullofwater.Topreventdamagetothetank,thetankmustbefilledwithwater.Watermustflowfromthehotwater faucetbeforeturning“ON”gasto thewater heater.

Tofillthewaterheaterwithwater:1.Close thewaterheaterdrainvalveby turning thehandle to the

right(clockwise).Thedrainvalveisonthelowerfrontofthewaterheater.

2. Open the cold water supply valve to the water heater. NOTE:Thecoldwatersupplyvalvemustbeleftopenwhenthewater heater is in use.

3.Toinsurecompletefillingofthetank,allowairtoexitbyopeningthenearesthotwaterfaucet.Allowwatertorununtilaconstantflowisobtained.Thiswillletairoutofthewaterheaterandthepiping.

4. Checkallwaterpipingandconnections for leaks.Repairasneeded.

aIr requIreMents

Breathing Hazard - Carbon Monoxide GasInstall water heater in accordance withthe Instruction Manual and NFPA 54 orCAN/CSA-B149.1.To avoid injury, combustion and ventilationair must be taken from outdoors.Do not place chemical vapor emittingproducts near water heater.

Breathing carbon monoxide can cause brain damage ordeath. Always read and understand instruction manual.

Forsafeoperationanadequatesupplyof freshuncontaminatedair forcombustionandventilationmustbeprovided.

An insufficient supply of air can cause recirculation of combustionproducts resulting in contamination thatmaybehazardous to life.Suchaconditionoftenwillresultinayellow,luminousburnerflame,causingsootingofthecombustionchamber,burnersandfluetubesandcreatesariskofasphyxiation.

DonotinstallthewaterheaterinaconfinedspaceunlessanadequatesupplyofairforcombustionandventilationisbroughtintothatspaceusingthemethodsdescribedintheConfinedSpacesectionthatfollows.

Neverobstructtheflowofventilationair. Ifyouhaveanydoubtsorquestionsatall,callyourgassupplier.Failure toprovidetheproper

13

amountofcombustionaircanresultinafireorexplosionandcausepropertydamage,seriousbodilyinjuryordeath.

unconfIned spaceAnUnconfinedSpace isonewhosevolume isnot less than50cubic feet per 1,000 Btu/hr (4.8 cubicmeters per kW) of thetotalinputratingofallappliancesinstalledinthespace.Roomscommunicatingdirectlywith thespace, inwhich theappliancesare installed, through openings not furnished with doors, areconsideredapartoftheunconfinedspace.

Makeupairrequirementsfortheoperationofexhaustfans,kitchenventilation systems, clothesdryersand fireplacesshall alsobeconsidered in determining the adequacy of a space to providecombustion,ventilationanddilutionair.

unusuallY tIGht constructIonInunconfinedspacesinbuildings,infiltrationmaybeadequatetoprovideairforcombustion,ventilationanddilutionoffluegases.However,inbuildingsofunusuallytightconstruction(forexample,weatherstripping,heavilyinsulated,caulked,vaporbarrier,etc.)additionalairmustbeprovidedusing themethodsdescribed intheConfinedSpacesectionthatfollows.

confIned spaceAConfinedSpaceisonewhosevolumeislessthan50cubicfeetper1,000Btu/hr(4.8cubicmetersperkW)ofthetotalinputratingofallappliancesinstalledinthespace.

Openingsmustbeinstalledtoprovidefreshairforcombustion,ventilationanddilution inconfinedspaces.Therequiredsize for theopenings isdependentonthemethodusedtoprovidefreshairtotheconfinedspaceandthetotalBtu/hrinputratingofallappliancesinstalledinthespace.

dIrect vent applIancesAppliances installed in aDirectVent configuration that derive allair for combustion from the outdoor atmosphere through sealedintakeairpipingarenotfactoredinthetotalapplianceinputBtu/hrcalculationsusedtodeterminethesizeofopeningsprovidingfreshairintoconfinedspaces.

eXhaust fansWhereexhaustfansareinstalled,additionalairshallbeprovidedtoreplacetheexhaustedair.Whenanexhaustfanisinstalledinthesamespacewithawaterheater,sufficientopeningstoprovidefreshairmustbeprovidedthataccommodatetherequirementsforallappliancesintheroomandtheexhaustfan.Undersizedopeningswillcauseairtobedrawnintotheroomthroughthewaterheater’sventsystemcausingpoorcombustion.Sooting,seriousdamagetothewaterheaterandtheriskoffireorexplosionmayresult.Itcanalsocreateariskofasphyxiation.

louvers and GrIllesThefreeareasofthefreshairopeningsintheinstructionsthatfollowdonottakeintoaccountthepresenceoflouvers,grillesorscreensintheopenings.

Therequiredsizeofopeningsforcombustion,ventilationanddilutionairshallbebasedonthe“netfreearea”ofeachopening.Wherethefreeareathroughadesignoflouverorgrilleorscreenisknown,itshallbeusedincalculatingthesizeofopeningrequiredtoprovidethefreeareaspecified.Wherethelouverandgrilledesignandfreeareaarenotknown,itshallbeassumedthatwoodlouverswillhave25%freeareaandmetallouversandgrilleswillhave75%freearea.Nonmotorizedlouversandgrillesshallbefixedintheopenposition.

fresh aIr openInGs for confIned spacesThe following instructions shall be used to calculate the size,number and placement of openings providing fresh air forcombustion, ventilation and dilution in confined spaces. Theillustrationsshowninthissectionofthemanualareareferencefor the openings that provide fresh air into confined spacesonly.Donot refer to these illustrations for thepurposeofventinstallation. See Venting Installation on page 18 for completeventinginstallationinstructions.

outdoor aIr throuGh two openInGs

fIGure 8.

The confined space shall be provided with two permanentopenings,onecommencingwithin12inches(300mm)ofthetopandonecommencingwithin12inches(300mm)ofthebottomoftheenclosure.Theopenings shall communicate directlywith theoutdoors.SeeFigure8.Eachopeningshallhaveaminimumfreeareaof1squareinchper4,000Btu/hr(550mm2perkW)oftheaggregateinputratingofallappliancesinstalledintheenclosure.Eachopeningshallnotbelessthan100squareinches(645cm2).

outdoor aIr throuGh one openInG

fIGure 9.

Alternatively a single permanent opening, commencingwithin 12inches(300mm)ofthetopoftheenclosure,shallbeprovided.SeeFigure9.Thewaterheatershallhaveclearancesofatleast1inch(25mm)fromthesidesandbackand6inches(150mm)fromthefrontoftheappliance.Theopeningshalldirectlycommunicatewiththeoutdoorsorshallcommunicatethroughaverticalorhorizontalducttotheoutdoorsorspacesthatfreelycommunicatewiththeoutdoorsandshallhaveaminimumfreeareaofthefollowing:1. 1square inchper3000Btu/hr (733mm2perkW)of the total

inputratingofallapplianceslocatedintheenclosure,and2. Notlessthanthesumoftheareasofallventconnectorsin

thespace.

14

outdoor aIr throuGh two horIzontal ducts

fIGure 10.

Theconfinedspaceshallbeprovidedwithtwopermanenthorizontalducts,onecommencingwithin12 inches(300mm)of the topandone commencingwithin 12 inches (300mm)of thebottomof theenclosure.Thehorizontalductsshallcommunicatedirectlywiththeoutdoors.SeeFigure10.Eachductopeningshallhaveaminimumfreeareaof1squareinchper2,000Btu/hr(1100mm2perkW)oftheaggregateinputratingofallappliancesinstalledintheenclosure.Whenductsareused,theyshallbeofthesamecrosssectionalareaasthefreeareaoftheopeningstowhichtheyconnect.Theminimumdimensionofrectangularairductsshallbenotlessthan3inches.

outdoor aIr throuGh two vertIcal ducts

The illustrations shown in this section of the manual are areference for the openings that provide fresh air into confinedspacesonly.do not refer to these illustrations for the purpose of ventinstallation. See Venting Installation on page 18 for completeventinginstallationinstructions.

fIGure 11.

Theconfinedspaceshallbeprovidedwith twopermanentverticalducts,onecommencingwithin12 inches(300mm)of the topandone commencingwithin 12 inches (300mm)of thebottomof the

enclosure.The vertical ducts shall communicate directlywith theoutdoors.SeeFigure11.Eachductopeningshallhaveaminimumfreeareaof1squareinchper4,000Btu/hr(550mm2perkW)oftheaggregateinputratingofallappliancesinstalledintheenclosure.Whenductsareused,theyshallbeofthesamecrosssectionalareaasthefreeareaoftheopeningstowhichtheyconnect.Theminimumdimensionofrectangularairductsshallbenotlessthan3inches.

aIr froM other Indoor spaces

fIGure 12.

Theconfinedspaceshallbeprovidedwithtwopermanentopenings,one commencingwithin 12 inches (300mm) of the top and onecommencingwithin12inches(300mm)ofthebottomoftheenclosure.SeeFigure12.Eachopeningshallcommunicatedirectlywithanadditionalroom(s)ofsufficientvolumesothatthecombinedvolumeofallspacesmeetsthecriteriaforanUnconfinedSpace.Eachopeningshallhaveaminimumfreeareaof1squareinchper1,000Btu/hr(2200mm2perkW)oftheaggregateinputratingofallappliancesinstalledintheenclosure.Eachopeningshallnotbelessthan100squareinches(645cm2).

ventInG

15

If thewater heater is being installed as a replacement for anexistingheaterinpre-existingventing,athoroughinspectionofexistingventingsystemmustbeperformedpriortoanyinstallationwork.VENTDAMPERS - Any vent damper, whether it is operatedthermallyorotherwisemustberemovedifitsuseinhibitsproperdraftingofthewaterheater.ThermallyOperatedVentDampers: thisgas-firedwaterheaterhas a thermal efficiency at or above 80%whichmay producea relatively low flue gas temperature.Such temperaturesmaynot be high enough to properly open thermally operated ventdampers.Thiswouldcausespillageofthefluegasesandmaycause carbonmonoxide poisoning. Vent dampersmust bearevidenceofcertificationascomplyingwiththecurrenteditionoftheAmericanNationalStandardANSIZ21.66CGA6.14(coveringelectrically andmechanically actuated vent dampers). Beforeinstallationofanyventdamper,consult the localgasutility forfurtherinformation.Toinsureproperventingofthisgas-firedwaterheater,thecorrectventpipediametermustbeutilized.Anyadditionsordeletionsofothergasappliancesonacommonventwiththiswaterheatermayadverselyaffecttheoperationofthewaterheater.Consultyourgassupplierifanysuchchangesareplanned.Forproperventingincertaininstallations,alargerdiameterventpipemaybenecessary.ConsultyourgassuppliertoaidyouindeterminingtheproperventingforyourwaterheaterfromtheventtablesinthecurrenteditionoftheNationalFuelGasCodeANSIZ223.1/NFPA 54 or the Natural Gas and Propane Installationcode cAN\cSA B 149.1. Periodicallychecktheventingsystemforsignsofobstructionordeteriorationandreplaceifneeded.Thecombustionandventilationairflowmustnotbeobstructed.Thewater heaterwith draft hood installedmust be connectedtoachimneyorlistedventpipesystem,whichterminatestotheoutdoors. Never operate the water heater unless it is vented to the outdoorsandhasadequateairsupplytoavoidrisksofimproperoperation, explosion or asphyxiation.Alignthelegsofthedrafthoodwiththeslotsprovided.Insertthe legsand secure thedraft hood to thewater heater’s topwith the fourscrewsprovidedasshown inFigure13.Donotalterthedrafthoodinanyway.Ifyouarereplacinganexistingwaterheater,besuretousethenewdrafthoodsuppliedwiththe water heater.Obstructed or deteriorated vent systemsmay present serioushealth risk or asphyxiation.

DRAFT HOOD

SHEET METAL SCREWS (FOUR PROVIDED)

LEGS

SLOT

INSTALL THE DRAFT HOOD WITHTHE FOUR SCREWS PROVIDED.

JACKET TOPSLOT

LEGS

fIGure 13.

The vent pipe from thewater heatermust be no less than thediameter of the draft hood outlet on thewater heater andmustslopeupwardat least1/4inchperlinearfoot(21mmpermeter).SeeFigure14.

All ventgasesmustbecompletelyvented to theoutdoorsof thestructure (dwelling). Installonly thedrafthoodprovidedwith thenewwaterheaterandnootherdrafthood.

Ventpipesmustbesecuredateachjointwithsheetmetalscrews.

fIGure 14.

Theremustbeaminimumof6”(153mm)clearancebetweensinglewall vent pipe and any combustiblematerial. Fill and seal anyclearancebetweensinglewallventpipeandcombustiblematerialwithmortarmix,cement,orothernoncombustiblesubstance.Forother thansinglewall, followventpipemanufacturer’s clearancespecifications.Toinsureatightfitoftheventpipeinabrickchimney,sealaroundtheventpipewithmortarmixcement.

Failure to have required clearances between vent piping andcombustiblematerialwillresultinafirehazard.

Be sure vent pipe is properly connected to prevent escape ofdangerousfluegaseswhichcouldcausedeadlyasphyxiation.

Chemicalvaporcorrosionoftheflueandventsystemmayoccurifairforcombustioncontainscertainchemicalvapors.Spraycanpropellants, cleaningsolvents, refrigeratorandairconditionerrefrigerants, swimming pool chemicals, calcium and sodiumchloride, waxes, bleach and process chemicals are typicalcompoundswhicharepotentiallycorrosive.

16

Gas pIpInG

Contact your local gas service company to ensure that adequategasserviceisavailableandtoreviewapplicableinstallationcodesforyourarea.SizethemaingaslineinaccordancewithTable3.Thefiguresshownareforstraightlengthsofpipeat0.5in.W.C.pressuredrop,whichisconsiderednormalforlowpressuresystems.Note:Fittingssuchaselbows,teesandlineregulatorswilladdtothepipepressuredrop.AlsorefertothecurrenteditionsoftheNationalFuelGasCode(NFPA54)orNaturalGasandPropaneInstallationCode(CAN/CSAB149.1).Makesuregassuppliedissametypelistedonmodelratingplate.Theinletgaspressuremustnotexceed14inchwatercolumn(2.6kPa)fornaturalandpropane(L.P.)gas.Theminimuminletgaspressureshownonratingplateisthatwhichwillpermitfiringatratedinput.Ifthegascontrolvalveissubjectedtopressuresexceeding1/2poundpersquareinch(3.5kPa),thedamagetothegascontrolvalvecouldresultinafireorexplosionfromleakinggas.Ifthemaingaslineshut-offservingallgasappliancesisused,alsoturn“off”thegasateachappliance.Leaveallgasappliancesshut“off”untilthewaterheaterinstallationiscomplete.Agaslineofsufficientsizemustberuntothewaterheater.ConsultthecurrenteditionofNationalFuelGasCodeANSIZ223.1/NFPA54ortheNaturalGasandPropaneInstallationCodeCAN/CSAB149.1andyourgassupplierconcerningpipesize.Theremustbe:• Areadilyaccessiblemanualshutoffvalve inthegassupply line

servingthewaterheater,and• Asedimenttrapaheadofthegascontrolvalvetohelppreventdirt

andforeignmaterialsfromenteringthegascontrolvalve.• Aflexiblegasconnectororagroundjointunionbetweentheshut

offvalveandcontrolvalvetopermitservicingoftheunit.Besuretocheckallthegaspipingforleaksbeforelightingthewaterheater.Useasoapywatersolution,notamatchoropenflame.Rinseoffsoapysolutionandwipedry.Theminimum inletgaspressureshownon the ratingplate is thatwhichwillpermitfiringattheratedinput.

taBle 3. Gas supplY lIne sIzes (In Inches)* MaXIMuM capacItY of pIpe In cuBIc feet per hourlenGth

In feet

noMInal Iron pIpe sIzes (Inches) Input In thousands (Btu/hr)

1/2" 3/4" 1" 1 1/4" 1 1/2" 2" 2 1/2" 3" 4"

10 175 360 680 1400 2100 3960 6300 11000 23000

20 120 250 465 950 1460 2750 4360 7700 15800

30 97 200 375 770 1180 2200 3520 6250 12800

40 82 170 320 660 990 1900 3000 5300 10900

50 73 151 285 580 900 1680 2650 4750 9700

60 66 138 260 530 810 1520 2400 4300 8800

70 61 125 240 490 750 1400 2250 3900 8100

80 57 118 220 460 690 1300 2050 3700 7500

90 53 110 205 430 650 1220 1950 3450 7200

100 50 103 195 400 620 1150 1850 3250 6700

125 44 93 175 360 550 1020 1650 2950 6000

150 40 84 160 325 500 950 1500 2650 5500

175 37 77 145 300 460 850 1370 2450 5000

200 35 72 135 280 430 800 1280 2280 4600

taBle 4.

lenGth In

Meters

noMInal Iron pIpe sIzes (Inches) Input In Kw

1/2" 3/4" 1" 1 1/4" 1 1/2" 2" 2 1/2" 3" 4"

3 51 105 199 410 615 1160 1845 3221 6735

6 35 73 142 278 428 805 1277 2255 4626

9 28 59 110 225 346 644 1031 1830 3748

12 24 50 94 193 290 556 878 1552 3192

15 21 44 83 170 264 492 776 1391 2840

18 19 40 76 155 237 445 703 1259 2577

21 18 37 70 143 220 410 659 1142 2372

24 17 35 64 135 202 381 600 1083 2196

27 16 32 60 126 190 357 571 1010 2108

31 15 30 57 117 182 337 542 952 1962

38 13 27 51 105 161 299 483 864 1757

46 12 25 47 95 146 278 439 776 1610

53 11 23 42 88 135 249 401 717 1464

61 10 21 40 82 126 234 375 688 1347

Usepipejointcompoundorteflontapemarkedasbeingresistanttotheactionofpetroleum[Propane(L.P.)]gases.

Thewaterheateranditsgasconnectionmustbeleaktestedbeforeplacingthewaterheaterinoperation.

The water heater and its individual shut-off valve shall bedisconnectedfromthegassupplypipingsystemduringanypressuretestingofthatsystemattestpressuresinexcessof1/2poundpersquareinch(3.5kPa).Itshallbeisolatedfromthegassupplypipingsystem by closing its individual manual shut-off valve during anypressuretestingof thegassupplypipingsystemat testpressuresequaltoorlessthan1/2poundpersquareinch(3.5kPa).ConnectingthegaspipingtothegascontrolvalveofthewaterheatercanbeaccomplishedbyeitherofthetwomethodsshowninFigures15 and 16.

fIGure 15. Gas pIpInG wIth fleXIBle connector.

fIGure 16. Gas pIpInG wIth allBlacK Iron pIpe to Gas control.

17

sedIMent traps

Asedimenttrapshallbeinstalledasclosetotheinletofthewaterheateraspracticalat thetimeofwaterheater installation.Thesediment trapshallbeeithera tee fittingwithacappednipplein thebottomoutletorotherdevice recognizedasaneffectivesediment trap. If a tee fitting is used, it shall be installed inconformancewith one of themethods of installation shown intheFigures15and16.

Contaminantsinthegaslinesmaycauseimproperoperationofthegascontrolvalvethatmayresultinfireorexplosion.Beforeattachingthegaslinebesurethatallgaspipeiscleanontheinside.Totrapanydirtorforeignmaterialinthegassupplyline,asedimenttrapmustbeincorporatedinthepiping.Thesedimenttrapmustbereadilyaccessible.Install inaccordancewiththe“GasPiping”section.RefertothecurrenteditionoftheNationalFuelGasCode,ANSIZ223.1/NFPA54ortheNaturalGasandPropaneInstallationCodeCAN/CSAB149.1.

18

FLAMMABLE

WARNING: If you do not follow these instructions exactly, afire or explosion may result causing property damage, personalinjury or loss of life.

BEFORE LIGHTING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINESA.

C.

D.WHAT TO DO IF YOU SMELL GAS

Do not try to light any appliance.Do not touch any electric switch; do not use anyphone in your building.Immediately call your gas supplier from a neighbor'sphone. Follow the gas supplier's instructions.

If you cannot reach your gas supplier, call the firedepartment.

LIGHTING INSTRUCTIONS

TOP KNOB

FIGURE 'A'

"OFF" POSITION

OF

F ON

PILOT

FIGURE 'B'

"PILOT" POSITION

OF

F ON

PILOT

FIGURE 'C'

"ON" POSITION

OF

F ON

PILOT

1. 2.TO TURN OFF GAS TO APPLIANCE

S e t t h e t h e r m o s t a t t o l o w e s t s e t t i n g . Push gas control knob down slightly and turn clock-wise to 'OFF'. Do not force. SEE FIGURE 'A'.

1.

10.

11.12.

13.

2.

3.

5.

6.

7.

8.

9.STOP! Read the safety informationabove on this label.

Push the gas control knob down slightly and turnclockwise to "OFF". SEE FIGURE 'A'.

NOTE: Knob cannot be turned from "PILOT" to "OFF"unless knob is pushed down slightly. Do not force.

Wait five (5) minutes to clear out any gas. If youthen smell gas, STOP! Follow "B" in thesafety information above on this label. Ifyou do not smell gas, go to next step.

This unit is equipped with a push button pilot ignitor,

on the gas control.

Continue to hold the gas control knob down for about one (1) minute after the pilot is lit. Release the gascontrol knob and it will pop back up. Pilot shouldremain lit. If it goes out , repeat step (3) through (9).It may take several minutes for air to clear the linesbefore the pilot will light.If knob does not pop up when released, stop andimmediately call your service technician or gassupplier.If the pilot will not stay lit after several tries, turn the gas control knob clockwise to 'OFF' andcall your service technician or gas supplier.SEE FIGURE 'A'

DANGER: Hotter water increases the riskof scald injury. Consult the instructionmanual before changing temperature.

At arm's length away, turn gas control knobcounterclockwise to 'ON'. SEE FIGURE 'C'.Set thermostat to desired setting.

Remove the outer door located belowthe gas control unit.

4.

which is used to light the pilot. Locate the ignitor

Turn gas control knob counterclockwiseto "PILOT". SEE FIGURE 'B'.

Replace the outer door.

DIAL

KNOBGAS CONTROL

THERMOSTATGAS CONTROL

PIEZOIGNITORGENERATOR

The pilot is located on the left front corner of the burner. It can be located by looking through the sight glass tothe left while pressing the piezo ignitor buttonseveral times. Look for a spark at the pilot location .

Once the pilot has been found, push the gas knoball the way down. Immediately press the pilot ignitorbutton rapidly (4) to (5) times. If the pilot does notlight, repeat step (3) through (9).

This appliance has a pilot which is lit by a piezo-electric spark gas ignition system. When lightingthe pilot, follow these instructions exactly.

B. BEFORE LIGHTING smell all around theappliance area for gas. Be sure to smell nextto the floor because some gas is heavier thanair and will settle on the floor.

Use only your hand to push down or turn the gascontrol knob. Never use tools. If the knob willnot push down or turn by hand, don't try to repairit, call a qualified service technician. Force orattempted repair may result in fire or explosion.

Do not use this appliance if any part has beenunder water. Immediately contact a qualifiedinstaller or service agency to replace a floodedwater heater. Do not attempt to repair the unit!It must be replaced!

Set the thermostat to the lowest setting by turningthermostat dial fully clockwise until it stops.

FOR YOUR SAFETY READ BEFORE LIGHTING

FIGURE "D"

PILOT

MAIN BURNER

THERMOCOUPLE &BURNER TUBE

19

start up condItIons

draft hood operatIonCheck draf t hood operation by per forming a worst casedepressurization of the building.With all doors and windowsclosed, andwith all air handling equipment and exhaust fansoperating such as furnaces, clothes dryers, range hoods andbathroomfans,amatchflameshouldstillbedrawnintothedrafthoodofthewaterheaterwithitsburnerfiring.Iftheflameisnotdrawn toward the draft hood, shut off water heater andmakenecessaryairsupplychangestocorrect.

condensatIonWhenever the water heater is f illed with cold water, somecondensatewillformwhiletheburnerison.Awaterheatermay

Shortrepeatedheatingcyclescausedbysmallhotwaterusescancause temperaturesat thepointofuse toexceed the thermostatsettingbyupto30°F(16.7°C). Ifyouexperiencethistypeofuseyou should consider using lower temperature settings to reducescaldhazards.

Anywaterheater’sintendedpurposeistoheatwater.Hotwaterisneededforcleansing,cleaning,andsanitizing(bodies,dishes,clothing). Untempered hot water can present a scald hazard.Dependingonthetimeelement,andthepeopleinvolved(adults,children, elderly, infirm, etc.) scaldingmay occur at differenttemperatures.

HOTTERWATERCANSCALD:Waterheatersareintendedtoproducehotwater.Waterheatedtoatemperaturewhichwillsatisfyspaceheating,clotheswashing,dishwashing,andothersanitizingneedscanscaldandpermanentlyinjureyouuponcontact.Somepeoplearemorelikelytobepermanentlyinjuredbyhotwaterthanothers.Theseincludetheelderly,children,theinfirm,orphysically/mentallyhandicapped.Ifanyoneusinghotwaterinyourhomefitsintooneofthesegroupsorifthereisalocalcodeorstatelawrequiringacertaintemperaturewateratthehotwatertap,thenyoumusttakespecialprecautions. In addition to using the lowest possible temperaturesettingthatsatisfiesyourhotwaterneeds,ameanssuchasamixingvalve should be used at the hot water taps used by these people or atthewaterheater.Mixingvalvesareavailableatplumbingsupplyorhardwarestores,seeFigure2.Followmanufacturer’sinstructionsforinstallationofthevalves.Beforechangingthefactorysettingonthethermostat,readthe“TemperatureRegulation”sectioninthismanual,seeFigures17and18.

teMperature reGulatIon

for Your InforMatIonappeartobeleakingwheninfactthewateriscondensation.Thisusuallyhappenswhen:

a.Anewwaterheaterisfilledwithcoldwaterforthefirsttime.

b.Burninggasproduceswatervaporinwaterheaters,particularlyhighefficiencymodelswherefluetemperaturesarelower.

c.Largeamountsofhotwaterareusedinashorttimeandtherefillwaterinthetankisverycold.

Moisturefromtheproductsofcombustioncondenseonthecoolertank surfacesand formdropsofwaterwhichmay fall onto theburnerorotherhotsurfacestoproducea“sizzling”or“frying”noise.

Excessive condensation can cause pilot outage due to waterrunningdownthefluetubeontothemainburnerandputtingoutthe pilot.

Neverallowsmallchildrentouseahotwatertap,ortodrawtheirownbathwater.Neverleaveachildorhandicappedpersonunattendedin a bathtub or shower.

NOTE:Awatertemperaturerangeof120°F-140°F(49°C-60°C)isrecommendedbymostdishwashermanufacturers.

Thethermostatofthiswaterheaterhasbeenfactorysetatitslowestposition (PIlOT lIGHTING). It is adjustable andmust be reset tothe desired temperature setting to reduce the risk of scald injury.Themark( )indicativeofapproximately120°F(49°C)ispreferredstartingpoint.SomeStateshavearequirementforalowersetting.

Turn thewater temperaturedial clockwise ( ) to decrease thetemperature,orcounterclockwise( )toincreasethetemperature.

Shouldoverheatingoccurorthegassupplyfailtoshutoff,turnoffthemanualgascontrolvalvetothewaterheater.

fIGure 17.

Temperature Time to Produce 2nd & 3rd

VERY HOT = APPROX.180°F (82°C) Nearly instantaneous

D = APPROX.160°F (71°C) About 1/2 second

C = APPROX.150°F (65°C) About 1-1/2 seconds

B = APPROX.140°F (60°C) Less than 5 seconds

A = APPROX.130°F (54°C) About 30 seconds

= APPROX.120°F (49°C) More than 5 minutes

LOW = APPROX.100°F (37.8°C) - - - - - - - -

Setting Degree Burns on Adult Skin

fIGure 18.

20

checKInG Gas InputWiththisheaterinoperation,determinewhetheritisreceivingthefullratedinputofgas.Thismaybedonebytimingthegasmeterandmeasuringgaspressurewithagaugeormanometer.Whentheheaterisoperatingatfullcapacity(fullgasinput)itshouldconsumeapproximately1cubicfootofgasinthetimeshowninTable5.

taBle 5. Input checK tIMe requIred to consuMe 1 cu. ft. of Gas

Model type of Gas Btu per cu. ft.

approx. time required to consume 1 cu. ft. of Gas

Bl-100 Natural Propane

1050 2500 50.3sec.119.8sec.

Use this formula to “clock” themeter. Be sure that other gasconsumingappliancesarenotoperatingduringthisinterval.

3,600XH=Btu/Hr T

T=Timeinsecondsneededtoburnonecubicfootofgas.

H=HeatingvalueofgasinBtu’spercubicfootofgas.

Btu/Hr=Actualheaterinputrate.

Example:

T=50.3seconds/ft3

H=1,050Btu/ft3(naturalgas)

Btu/Hr=?

3,600X1,050=75,100Btu/Hr(22.0kW) 50.3

Comparetheactualinputratetothatgivenontheheater’sratingplate.Intheexample,theBL-100’sfullinputrateshouldbe75,100Btu/Hrfornaturalgas.

Becauseof the suddennessandamount ofwater, condensationwatermaybediagnosedasa“tankleak”.Afterthewaterinthetankwarmsup(about1-2hours),theconditionshoulddisappear.

Donot assume thewater heater is leakinguntil therehasbeenenoughtimeforthewaterinthetanktowarmup.

Anundersizedwaterheaterwillcausemorecondensation.Thewaterheatermustbesizedproperlytomeetthefamily’sdemandsforhotwaterincludingdishwashers,washingmachinesandshowerheads.

Excessivecondensationmaybenoticedduringthewinterandearlyspringmonthswhenincomingwatertemperaturesareattheirlowest.

Goodventingisessentialforagasfiredwaterheatertooperateproperlyaswellastocarryawayproductsofcombustionandwatervapor.

sMoKe/odorItisnotuncommontoexperienceasmallamountofsmokeandodorduringtheinitialstart-up.Thisisduetoburningoffofoilfrommetalparts, and will disappear in a short while.

stranGe soundsPossiblenoisesduetoexpansionandcontractionofsomemetalpartsduringperiodsofheat-upandcool-downdonotnecessarilyrepresentharmfulordangerousconditions.

Condensationcausessizzlingandpoppingwithintheburnerareaduringheatingandcoolingperiodsandshouldbeconsiderednormal.See“Condensation”inthissection.

operatIonal condItIons

sMellY waterIneachwaterheaterthereisinstalledatleastoneanoderod(seeparts section) for corrosionprotectionof the tank.Certainwaterconditionswill causea reactionbetween this rodand thewater.Themostcommoncomplaintassociatedwiththeanoderodisoneofa“rotteneggsmell”inthehotwater.Thisodorisderivedfromhydrogensulfidegasdissolvedinthewater.Thesmellistheresultoffourfactorswhichmustallbepresentfortheodortodevelop:

a.Aconcentrationofsulfateinthesupplywater.

b.Littleornodissolvedoxygeninthewater.

c.Asulfate reducingbacteriawhichhasaccumulatedwithin thewaterheater(thisharmlessbacteriaisnontoxictohumans).

d.Anexcessofactivehydrogeninthetank.Thisiscausedbythecorrosionprotectiveactionoftheanode.

Smellywatermaybeeliminatedorreducedinsomewaterheatermodelsbyreplacingtheanode(s)withoneoflessactivematerial,and then chlorinating thewater heater tank and all hot waterlines.ContactthelocalwaterheatersupplierorserviceagencyforfurtherinformationconcerninganAnodeReplacementKitandthischlorinationtreatment.

Ifthesmellywaterpersistsaftertheanodereplacementandchlorinationtreatment,wecanonlysuggestthatchlorinationoraerationofthewatersupplybeconsideredtoeliminatethewaterproblem.

do not remove the anode leaving the tank unprotected. By doing so, all warranty on the water heater tank is voided.

“aIr” In hot water faucets

HYDROGENGAS: Hydrogen gas can be produced in a hotwatersystemthathasnotbeenusedforalongperiodoftime(generally two weeks or more). Hydrogen gas is extremelyflammable and explosive. To prevent the possibility of injuryunder these conditions,we recommend the hotwater faucet,located farthest away, be opened for severalminutes beforeanyelectricalapplianceswhichareconnectedtothehotwatersystemareused(suchasadishwasherorwashingmachine).Ifhydrogengasispresent,therewillprobablybeanunusualsoundsimilartoairescapingthroughthepipeasthehotwaterfaucetisopened.Theremustbenosmokingoropenflamenearthefaucetatthetimeitisopen.

hIGh water teMperature shut off sYsteMThiswaterheater isequippedwithanautomaticgasShut-offsystem.Thissystemworkswhenhighwatertemperaturesarepresent. The high temperature Shut-off is built into the gascontrolvalve.Itisnon-resettable.IfthehightemperatureShut-offactivates, thegascontrolvalvemustbereplaced.Contactyourgassupplierorserviceagency.Turn“OFF”theentiregassupply to the water heater.

21

perIodIc MaIntenanceventInG sYsteM InspectIon

Atleastonceayearavisualinspectionshouldbemadeoftheventingsystem.Youshouldlookfor:

1.Obstructions which could cause improper venting. The combustionandventilationairflowmustnotbeobstructed.

2.Damageordeteriorationwhichcouldcause improperventing orleakageofcombustionproducts.

3.Rustedflakesaroundtopofwaterheater.

Besure theventpiping isproperlyconnected topreventescapeofdangerousfluegaseswhichcouldcausedeadlyasphyxiation.

Obstructionsanddeterioratedventsystemsmaypresentserioushealth risk or asphyxiation.

Chemicalvaporcorrosionoftheflueandventsystemmayoccurifairforcombustioncontainscertainchemicalvapors.Spraycanpropellants, cleaning solvents, refrigerator and air conditionerrefrigerants,swimmingpoolchemicals,calciumandsodiumchloride,waxes,bleachandprocesschemicalsaretypicalcompoundswhicharepotentiallycorrosive.

Ifafterinspectionofventsystemyoufoundsootingordeterioration,somethingiswrong.Callthelocalgasutilitytocorrectproblemandcleanorreplacetheflueandventingbeforeresumingoperationofwater heater.

Burner InspectIon

Flood damage to awater heatermay not be readily visible orimmediatelydetectable.However,overaperiodoftimeafloodedwater heaterwill create dangerous conditionswhich can causeDEATH, SERIOUS BODIlY INjURY, OR PROPERTY DAMAGE. Contactaqualifiedinstallerorserviceagencytoreplaceafloodedwaterheater.Donotattempttorepairtheunit!Itmustbereplaced!

Atleastonceayearavisualinspectionshouldbemadeofthemainburnerandpilotburner,seeFigure19.Inspectburnerflamesthroughviewport.Flamesshouldbeverysmallwithabluehazeandsmallamountsofyellowororangeattheedges.Afterseveralminutesofoperationtheburnerscreenmayglowred.

Youshouldcheck forsooting.Soot isnotnormalandwill impairpropercombustion.

Sootbuild-upindicatesaproblemthatrequirescorrectionbeforefurtheruse.Turn“OFF”gastowaterheaterandleaveoffuntilrepairs aremade, because failure to correct the cause of the

sooting can result in a fire causing death, serious injury, orpropertydamage.

Flame Characteristics

Correct FlameRed/Orange

fIGure 19.

Natural Gas (Low Nox)Burner Door Assembly

Use brush on this surface

Burner Pilot Assembly

fIGure 20.

Burner cleanInG

If inspectionoftheburnershowsthatcleaningisrequired,turnthe gas control knob clockwise ( ) to the “OFF” position,depressingslightly.

note: the knob cannot be turned from “pIlot” to “off” unless knob is depressed slightly. do not force.

Checktheburnertoseeifit’sdirtyorclogged.Theburnermaybecleanedwithasoftpaintbrush,seeFigure18.Donotuseawirebrushoranytoolthatmaydamagetheburnerscreen.Important:Donotusetheburneriftheburnerscreenisdamaged.NOTE:Damagemayberipsorholesintheburnerscreen.Discolorationisnormal.

houseKeepInG

Fire and Explosion HazardDo not obstruct combustion air openings at the bottom of the water heater.Do not use or store flammable vaporproducts such as gasoline, solventsor adhesives in the same room or area near water heater or other appliance.

Can cause serious injury or death.

Vacuumaroundbaseofwaterheater fordust,dirt,and lintonaregularbasis.

22

WhencheckingtheTemperature-PressureReliefValveoperation,makesurethat(1)nooneisinfrontoforaroundtheoutletoftheTemperature-PressureReliefValvedischargeline,and(2)thatthewaterdischargewillnotcauseanypropertydamage,asthewatermaybeextremelyhot.Usecarewhenoperatingvalveasthevalvemaybehot.

Tocheckthereliefvalve,lifttheleverattheendofvalveseveraltimes,seeFigure21.Thevalveshouldseatproperlyandoperatefreely.

Ifaftermanuallyoperatingthevalve,itfailstocompletelyresetandcontinuestoreleasewater,immediatelyclosethecoldwaterinlettothewaterheateranddrainthewaterheater,seeDrainingAndFlushingonpage25.ReplacetheTemperature-PressureReliefValvewith a properly rated/sized newone, seeTemperature-PressureReliefValveonpage11forinstructionsonreplacement.

DISCHARGE PIPE

TEMPERATURE-PRESSURERELIEF VALVE

fIGure 21.

IftheTemperature-PressureReliefValveonthewaterheaterweepsordischargesperiodically,thismaybeduetothermalexpansion.

note:ExcessivewaterpressureisthemostcommoncauseofTemperature-Pressure Relief Valve leakage. Excessive watersystempressure ismostoftencausedby“thermalexpansion”ina“closedsystem.”SeeClosedWaterSystemsandThermalExpansiononpage10.TheTemperature-PressureReliefValveisnotintendedfortheconstantreliefofthermalexpansion.

Temperature-Pressure Relief Valve leakage due to pressurebuild up in a closed system that does not have a thermalexpansion tank installed is not covered under the limitedwarranty. Thermal expansion tanks must be installed on allclosedwatersystems.

do not pluG the teMperature-pressure relIef valve openInG. thIs can cause propertY daMaGe, serIous InjurY or death.

Explosion HazardTemperature-Pressure Relief Valvemust comply with ANSI Z21.22-CSA 4.4 and ASME code.Properly sized temperature-pressure relief valve must beinstalled in opening provided.

Can result in overheating andexcessive tank pressure.Can cause serious injury or death.

recoMMended procedure for perIodIc reMoval of lIMe deposIts froM tanK tYpe coMMercIal water heaters

Theamountofcalciumcarbonate(lime)releasedfromwaterisindirectproportiontowatertemperatureandusage,seechart.Thehigherthewatertemperatureorwaterusage,themorelimedepositsaredroppedoutofthewater.Thisisthelimescalewhichformsinpipes,heatersandoncookingutensils.

INSTALLEDINSUITABLEAREA:Toinsuresufficientventilationand combustion air supply, proper clearances from thewaterheater must be maintained. See “Locating the NewWaterHeater”section.Combustiblematerialssuchasclothing,cleaningmaterials,orflammableliquids,etc.mustnotbeplacedagainstoradjacenttothewaterheaterwhichcancauseafire.

anode rod InspectIon

Property Damage Hazard

• Avoid water heater damage.

• Inspection and replacement of anode rod required.

CAUTION

Theanoderodisusedtoprotectthetankfromcorrosion.Mosthotwatertanksareequippedwithananoderod.Thesubmergedrodsacrifices itself toprotect the tank. Insteadofcorroding the tank,waterionsattackandeatawaytheanoderod.Thisdoesnotaffectwater’stasteorcolor.Therodmustbemaintainedtokeepthetankinoperatingcondition.Anodedeteriorationdependsonwaterconductivity,notnecessarilywatercondition.Acorrodedorpittedanoderodindicateshighwaterconductivityandshouldbecheckedand/orreplacedmoreoftenthanananoderodthatappearstobeintact.Replacementofadepletedanoderodcanextendthelifeofyourwaterheater.Inspectionshouldbeconductedbyaqualifiedserviceagency,andataminimumshouldbecheckedannuallyafterthewarrantyperiod.Artificially softenedwater is exceedingly corrosive because theprocesssubstitutessodiumionsformagnesiumandcalciumions.Theuseof awater softenermaydecrease the life of thewaterheater tank.Theanoderodshouldbeinspectedafteramaximumofthreeyearsandannuallythereafteruntiltheconditionoftheanoderoddictatesitsreplacement.note: Artificially softenedwater requires the anode rod to beinspectedannually.Thefollowingaretypical(butnotall)signsofadepletedanoderod:• Themajorityoftherodsdiameterislessthan3/8”.• Significantsectionsofthesupportwire(approx.1/3ormoreoftheanoderod’slength)arevisible.

teMperature-pressure relIef valve test

Burn hazard.


Keep clear of Temperature-Pressure Relief Valvedischarge outlet.

ItisrecommendedthattheTemperature-PressureReliefValveshould be checked to ensure that it is in operating conditionevery6months.

23

Limeaccumulationnotonlyreducesthelifeoftheequipmentbutalsoreducesefficiencyoftheheaterandincreasesfuelconsumption.

The usage of water softening equipment greatly reduces thehardnessofthewater.However, thisequipmentdoesnotalwaysremoveallofthehardness(lime).Forthisreasonitisrecommendedthataregularschedulefordelimingbemaintained.

Thetimebetweencleaningwillvaryfromweekstomonthsdependinguponwaterconditionsandusage.

Thedepthoflimebuildupshouldbemeasuredperiodically.Heatersequippedwithcleanoutswillhaveabout2”of limebuildupwhentheleveloflimehasreachedthebottomofthecleanoutopening.Aschedulefordelimingshouldthenbesetup,basedontheamountoftimeitwouldtakefora1”buildupoflime.Itisrecommendedthatthewaterheaterinitiallybeinspectedafter6months.

Example1:Initial inspectionafter6monthsshows1/2”of limeaccumulation.Therefore,theheatershouldbedelimedonceayear.

Example2:Initialinspectionafter6monthsshows2”oflimeaccumulation.Therefore,theheatershouldbedelimedevery3months.

fIGure 22.

delIMInG solvents

UN•LIME is recommended fordeliming.UN•LIME isapatentedfoodgradeacidwhichissafetohandleanddoesnotcreatetheharmfulfumeswhichareassociatedwithotherproducts.

UN•LIMEmaybeobtainedfromyourdealer,distributororwaterheatermanufacturer.OrderPartNumber9005416105,1gallon,packed 4 gallons per case or Part Number 9005417105, 5 galloncontainer.

note:Un•LimeisnotavailableforuseinCanada.

Hydrochloric baseacids arenot recommended for useonglasslined tanks.

Observehandlinginstructionsonlabelofproductbeingused.

tanK cleanout procedure

Thefollowingpracticeswillensurelongerlifeandenabletheunittooperateatitsdesignedefficiency:

1. Onceamonththeheatershouldbeflushed.Openthedrainvalveandallowtwogallonsofwatertodrainfromtheheater.Inletwatervalveshouldremainopentomaintainpressureintank.

2. Acleanoutopeningisprovidedforperiodiccleaningofthetank.Gasmustbeshutoffandheaterdrainedbeforeopeningcleanout.

Tocleanheaterthroughcleanoutopening,proceedasfollows:

1. Drain heater.

2. Removeoutercoverplatefromlowersideofheaterjacket.

3. Removesix(6)hexheadscrewssecuringtankcleanoutplateandremoveplate.

4. Removelime,scale,orsedimentusingcarenottodamagetheglasslining.

5. Inspect cleanout plate gasket, if newgasket is required, seereplacementpartslistforitemnumber.

6. Installcleanoutplate.Besuretodrawplateuptightbytighteningscrewssecurely.

7. Replaceouterjacketcoverplate.

fIGure 23.

9. Insomewaterareasthesedimentmightnotberemovedbythismethodandmayresultinthewaterheatermakingrumblingorboiling noises.To dissolve and remove thesemore stubbornmineral deposits,A.O.SmithUN•LIMEProfessionalDelimershould be used.

delIMInG usInG flo-juG Method

UN•LIMEinthe5gallonsizeisrecommendedfordelimingofthe100models. UN•LIMEwith thenecessary hosesand fittings todelimeyourheaterisalsoavailableasakit:Up-N-DownTransferKit.ContactyourlocalA.O.Smithdealer,distributoror,A.O.SmithCorporation,Telephone: (800)433-2545,Fax: (800)433-2515orWebsite:www.hotwater.com.

prepare the water heaterTodelimethewaterheaterusingtheFlo-Jugmethod,firstpreparetheheaterfordelimingasdescribedinthe“Why?When?andHow?”booklet,FormNo.4800.Theninstallthelongplasticmaleadapterfittingintothedrainvalveopeningofthewaterheater.Useteflontapeandhandtightenonly.Donotovertighten.

prepare the up-n-down transfer KItThenextstepisthepreparationontheUp-N-DownTransferKit,ifyouhavenotalreadydoneso:

1. Withthe5gallonUp-N-Downcontainerintheverticalposition,unscrewtheplasticventcapinthehandleandpiercetheplasticmembraneovertheventbossunderthecaptoallowthecontainertovent.

note: Ifyourcontainerdoesnothave theventcapandventboss,drilla3/16”(4.76mm)holeinthehandle.Whenyouhavefinisheddelimingyouwillbeabletoplugthisdrilledventwiththestainlesssteelscrewthatissuppliedwiththekit.

2. Removethecontainer’scapandcutplasticmembranelocatedinthe3/4”IPTopeningincap.Takecaretonotdamagethethreads.

3. Findthe3/4”maleadapter,applyteflontapetothethreadedendandscrewitintothe3/4”IPTopeninginthecap.

24

4. Putcapwithmaleadapterbackonthecontainerandslide3/4”hoseoverendofmaleadapterandfasteninplaceusinghoseclampprovided.

delIMe usInG flo-juG Method

5. Slidethehoseclampoverendofhoseandslidehoseoverthemaleadapter in thewaterheaterdrainopeningandsecure inplaceusinghoseclamp.

6. Liftcontainertothe“Pour”PositionbeingcarefultokeeptheventinthehandleabovetheliquidlevelandpourtheUN•LIMEintothe heater.

7. Lowercontainer,youmayhavetoplacethecontaineronitsemptycartontopreventtheUN•LIMEfromflowingbackintothecontainer.

8. LetUN•LIMEremainintheheaterfor5minutesandthenlowerthecontainertothe“Drain”Position.

9. Delimingactivity is indicatedbyfoamingonthesurfaceof theUN•LIME.Ifthereisdelimingactivity,repeatsteps6thru8.

Normally,limeremovalwillbecompletedwithinonehour.Severebuild-upoflimemaytakelongerthananhourtocompletedescaling.

Note:TocheckUN•LIMEforcontinueduse,placesomescaleorwhitechalkinaglasswithasmallamountofUN•LIME.IfthematerialisvigorouslydissolvedbytheUN•LIME,itcanbereused;ifnot,theUN•LIMEshouldbereplaced.

If the temperature-pressure reliefvalveon theapplianceweepsordischargesperiodically,thismaybeduetothermalexpansion.Youmayhaveacheckvalveinstalledinthewaterlineorawatermeterwith a check valve.Consult your localwater supplier orserviceagencyforfurtherinformation.Donotplugthetemperature-pressurereliefvalve.

draInInG and flushInG

It is recommended that the water heater storage tank bedrained and flushed every 6 months to reduce sedimentbuildup.Thewaterheatershouldbedrainedifbeingshutdownduringfreezingtemperatures.SeeFeaturesAndComponentsinthismanualforthelocationofthewaterheatercomponentsdescribedbelow.

Burn harzard.


Keep hands clear of drainvalve discharge.

to draIn the water heater storaGe tanK:1. Turnofftheelectricalsupplytothewaterheater.2. TurnoffthegassupplyattheMainGasShutoffValveifthe

waterheaterisgoingtobeshutdownforanextendedperiod.3. Ensurethecoldwaterinletvalveisopen.4. Openanearbyhotwaterfaucetandletthewaterrununtil

thewaterisnolongerhot.5. Closethecoldwaterinletvalvetothewaterheater.

6. Connect a hose to the water heater drain valve andterminateittoanadequatedrain.

7. Open the water heater drain valve and allow all the water to drainfromthestoragetank.

8. close the water heater drain valve when all water in the storagetankhasdrained.

9. ClosethehotwaterfaucetopenedinStep4.10. Ifthewaterheaterisgoingtobeshutdownforanextended

period,thedrainvalveshouldbeleftopen.to flush the water heater storaGe tanK:1. Turnofftheelectricalsupplytothewaterheater.2. Ensurethecoldwaterinletvalveisopen.3. Openanearbyhotwaterfaucetandletthewaterrununtil

thewaterisnolongerhot.Thenclosethehotwaterfaucet.4. Connectahose to thedrainvalveand terminate it toan

adequate drain.5. Ensure the drain hose is secured before and during the

entire flushing procedure. Flushing is performed withsystemwaterpressureappliedtothewaterheater.

6. Openthewaterheaterdrainvalvetoflushthestoragetank.7. Flush thewaterheater storage tank to removesediment

andallowthewatertoflowuntilitrunsclean.8. Close the water heater drain valve when flushing is

completed.9. Removethedrainhose.10. Fillthewaterheater-seeFillingTheWaterHeaterinthismanual.11. Turnontheelectricalsupplytoplacethewaterheaterback

in operation.12. TurnonthegassupplytothewaterheaterattheMainGas

ShutoffValve.13. Allowthewaterheatertocompleteseveralheatingcycles

toensureitisoperatingproperly.

servIce

Beforecallingforrepairservice,readthe“StartUpConditions”and“OperationalConditions”foundinthe“ForYourInformation”sectionofthismanual.

Ifaconditionpersistsoryouareuncertainabouttheoperationofthewaterheatercontactaserviceagency.Ifyouarenotthoroughlyfamiliarwithgascodes,yourwaterheater,andsafetypractices,contactyourgassupplierorqualifiedinstallertocheckthewaterheater.

Use the ”Leakage Checkpoints” guide to check a “Leaking” waterheater.Manysuspected“Leakers”arenotleakingtanks.Oftenthesourceofthewatercanbefoundandcorrected.

Readthismanualfirst.Thenbeforecheckingthewaterheatermakesurethegassupplyhasbeenturned“OFF”,andneverturnthegas“ON”beforethetankiscompletelyfullofwater.

Neverusethiswaterheaterunlessitiscompletelyfilledwithwater.Topreventdamagetothetank,thetankmustbefilledwithwater.Watermustflowfromthehotwaterfaucetbeforeturning“ON”gasto the water heater.

Readthismanualfirst.Thenbeforecheckingthewaterheatermakesurethegassupplyhasbeenturned“OFF”,andneverturnthegas“ON”beforethetankiscompletelyfullofwater.

Neverusethiswaterheaterunlessitiscompletelyfilledwithwater.Topreventdamagetothetank,thetankmustbefilledwithwater.Watermustflowfromthehotwaterfaucetbeforeturning“ON”gasto the water heater.

25

leaKaGe checKpoInts

A.Wateratthedrafthoodiswatervaporwhichhascondensedoutofthecombustionproducts.Thisiscausedbyaprobleminthevent.Contactthegasutility.

B.*Condensationmaybeseenonpipesinhumidweatherorpipeconnectionsmaybeleaking.

C.*Theanoderodfittingmaybeleaking.

D.Smallamountsofwaterfromtemperature-pressurereliefvalvemaybeduetothermalexpansionorhighwaterpressureinyourarea.

E.*The temperature-pressure relief valvemaybe leakingat thetankfitting.

F.Waterfromadrainvalvemaybeduetothevalvebeingslightlyopened.

G.*Thedrainvalvemaybeleakingatthetankfitting.

H.Combustionproductscontainwatervaporwhichcancondenseonthecoolersurfacesofthetank.Dropletsformanddripontotheburnerorrunonthefloor. This iscommonatthetimeofstart-upafterinstallationandwhenincomingwateriscold.

I. Waterinthewaterheaterbottomoronthefloormaybefromcondensation,looseconnections,orthereliefvalve.DONOTreplacethewaterheateruntilafullinspectionofallpossiblewatersourcesismadeandnecessarycorrectivestepstaken.

Leakage fromother appliances,water lines, or ground seepageshouldalsobechecked.

* To checkwhere threaded portion enters tank, insert cottonswabbetweenjacketopeningandfitting.Ifcottoniswet,follow“Draining”instructionsinthe“PeriodicMaintenance”sectionandthenremovefitting.Putpipedopeorteflontapeonthethreadsandreplace.Thenfollow“FillingtheWaterHeater”instructionsinthe“InstallingtheNewWaterHeater”section.

26

trouBleshootInG GuIdelInesTheseguidelinesshouldbeutilizedbyaqualifiedserviceagent.

Problem cause Solution

WATER lEAkS

Improperlysealed,hotorcoldsupplyconnection,reliefvalve,drainvalve,orthermostatthreads. Tightenthreadedconnections.

Leakagefromotherappliancesorwaterlines. Inspectotherappliancesnearwaterheater.

Condensationofflueproducts. RefertoCONDENSATION.

lEAkING T&P VAlVE

Thermalexpansioninclosedwatersystem. Installthermalexpansiontank(DONOTplugT&Pvalve).

Improperlyseatedvalve.Checkreliefvalveforproperoperation(DONOTplugT&Pvalve).

SMEllY WATERHighsulfateormineralcontentinwatersupply. Drainandflushheaterthoroughly,thenrefill.

Bacteriainwatersupply. chlorinate or aerate water supply.

PIlOT WIll NOT lIGHT

Gascontrolknobnotpositionedcorrectly. RefertoLIGHTINGINSTRUCTIONS.

Maingassupplyoff. Turnonmaingasshutoffvalve.

Thermocouplemalfunction. Replacepilotassemblyand/orthermocouple.

Matchnotclosetopilot Locatepilot,movematchcloser.

BURNER WIll NOT

STAY lIT


DefectiveGasControl. ReplaceGasControl.

PIlOT OUTAGE

Dirty pilot burner. Cleanpilotassembly.


DefectiveGasControl. ReplaceGasControl.

Thermocoupletipisnotincontactwithpilotflame. Insertthermocouplecorrectly.

NOT ENOUGH HOT WATER

Heaternotlitorthermostatnoton. RefertoLIGHTINGINSTRUCTIONS.

Thermostatsettoolow. RefertoTEMPERATUREREGULATION.

Heater undersized. Reducehotwateruse.

Lowgaspressure. Contactyourgassupplier.

Incomingwaterisunusuallycold. Allowmoretimeforheatertore-heat.

Leakinghotwaterpipesorfixtures. Haveplumbercheckandrepairleaks.

Hightemperaturelimitswitchactivated. Contactaserviceagencytodeterminecause.

WATER TOO HOT Thermostatsettoohigh. RefertoTEMPERATUREREGULATION.

WATER HEATER SOUNDS Condensationdrippingonburner. RefertoCONDENSATION.

SIZZLINGORRUMBlING

Sedimentorcalciuminbottomofheatertank. Cleansedimentfromtank.RefertoDRAININGinstructionsinMaintenancesectionofmanual.

SOOTING Impropercombustion. Noadjustmentavailable.Contactaserviceagencytodeterminecause.

VENT GAS ODORS

Lackofsupplyair.

Contactaserviceagencytodeterminecause.Improperlyinstalledventpiping.

Downdraft.

Poorcombustion.

27

water pIpInG dIaGraMs

Oct

ober

200

9 | P

rinte

d in

U.S

.A. |

© A

. O. S

mith

Fo

r Tec

hnic

al In

form

atio

n an

d A

utom

ated

Fax

Ser

vice

, cal

l 800

-527

-195

3 or

vis

it w

ww

.hot

wat

er.c

om.

AO

SC

G61

130

| PAG

E 1

of 1

A

. O. S

mith

Cor

pora

tion

rese

rves

the

right

to m

ake

prod

uct c

hang

es o

r im

prov

emen

ts w

ithou

t prio

r not

ice.

NO

TES

:1.

P

refe

rred

pip

ing

diag

ram

.2.

Th

e te

mpe

ratu

re a

nd p

ress

ure

relie

f val

ve s

ettin

g sh

all n

ot e

xcee

d pr

essu

re ra

ting

of a

ny c

ompo

nent

in th

e sy

stem

.3.

S

ervi

ce v

alve

s ar

e sh

own

for s

ervi

cing

uni

t. H

owev

er, l

ocal

cod

es s

hall

gove

rn th

eir u

sage

.4.

The

Tan

k Te

mpe

ratu

re C

ontro

l sho

uld

be w

ired

to a

nd c

ontro

l the

pum

p be

twee

n th

e w

ater

hea

ter(

s) a

nd th

e st

orag

e ta

nk(s

).5.

The

wat

er h

eate

r’s o

pera

ting

ther

mos

tat s

houl

d be

set

5 d

egre

es F

hig

her t

han

the

Tank

Tem

pera

ture

Con

trol.

SIN

GLE

FLU

E -

(1 U

NIT

)

LEG

EN

DTE

MP

ER

ATU

RE

& P

RE

SS

UR

ER

ELI

EF

VALV

E

PR

ES

SU

RE

RE

LIE

F VA

LVE

CIR

CU

LATI

NG

PU

MP

TAN

K TE

MPE

RAT

UR

E C

ON

TRO

L

DR

AIN

FULL

PO

RT

BA

LL V

ALV

E

TEM

PE

RAT

UR

E G

AG

E

WAT

ER

FLO

W S

WIT

CH

CH

EC

K V

ALV

EW

AR

NIN

G: T

HIS

DR

AWIN

G S

HO

WS

SU

GG

ES

TED

PIP

ING

CO

NFI

GU

RAT

ION

AN

D O

THE

R D

EV

ICE

S;

CH

EC

K W

ITH

LO

CA

L C

OD

ES

AN

D O

RD

INA

NC

ES

FOR

AD

DIT

ION

AL

RE

QU

IRE

ME

NTS

.

FIN

ISH

ED

FLO

OR

HO

TC

OLD

CO

LD EX

PA

NS

ION

TAN

K

CO

LD W

ATE

RS

UP

PLY

PIP

E T

&P

TO

OP

EN

DR

AIN

28 Oct

ober

200

9 | P

rinte

d in

U.S

.A. |

© A

. O. S

mith

Fo

r Tec

hnic

al In

form

atio

n an

d A

utom

ated

Fax

Ser

vice

, cal

l 800

-527

-195

3 or

vis

it w

ww

.hot

wat

er.c

om.

AO

SC

G61

140

| PAG

E 1

of 1

A

. O. S

mith

Cor

pora

tion

rese

rves

the

right

to m

ake

prod

uct c

hang

es o

r im

prov

emen

ts w

ithou

t prio

r not

ice.

NO

TES

:1.

P

refe

rred

pip

ing

diag

ram

.2.

Th

e te

mpe

ratu

re a

nd p

ress

ure

relie

f val

ve s

ettin

g sh

all n

ot e

xcee

d pr

essu

re ra

ting

of a

ny c

ompo

nent

in th

e sy

stem

.3.

S

ervi

ce v

alve

s ar

e sh

own

for s

ervi

cing

uni

t. H

owev

er, l

ocal

cod

es s

hall

gove

rn th

eir u

sage

.4.

Th

e Ta

nk T

empe

ratu

re C

ontro

l sho

uld

be w

ired

to a

nd c

ontro

l the

pum

p be

twee

n th

e w

ater

hea

ter(

s) a

nd th

e st

orag

e ta

nk(s

).5.

Th

e w

ater

hea

ter’s

ope

ratin

g th

erm

osta

t sho

uld

be s

et 5

deg

rees

F h

ighe

r tha

n th

e Ta

nk T

empe

ratu

re C

ontro

l.

SIN

GLE

FLU

E -

(1 U

NIT

) WIT

H V

ER

TIC

AL

STO

RA

GE

TA

NK

LEG

EN

DTE

MP

ER

ATU

RE

& P

RE

SS

UR

ER

ELI

EF

VALV

E

PR

ES

SU

RE

RE

LIE

F VA

LVE

CIR

CU

LATI

NG

PU

MP

TAN

K TE

MPE

RAT

UR

E C

ON

TRO

L

DR

AIN

FULL

PO

RT

BA

LL V

ALV

E

TEM

PE

RAT

UR

E G

AG

E

WAT

ER

FLO

W S

WIT

CH

CH

EC

K V

ALV

EW

AR

NIN

G: T

HIS

DR

AWIN

G S

HO

WS

SU

GG

ES

TED

PIP

ING

CO

NFI

GU

RAT

ION

AN

D O

THE

R D

EV

ICE

S;

CH

EC

K W

ITH

LO

CA

L C

OD

ES

AN

D O

RD

INA

NC

ES

FOR

AD

DIT

ION

AL

RE

QU

IRE

ME

NTS

.

FIN

ISH

ED

FLO

OR

HO

TC

OLD

EX

PA

NS

ION

TAN

KCO

LD W

ATE

RS

UP

PLY

HO

T W

ATE

RR

ETU

RN

FR

OM

FI

XTU

RE

S

HO

T W

ATE

RTO

FIX

TUR

ES

ALT

. CO

LDW

ATE

R C

ON

NE

CTI

ON

PIP

E T

&P

TO

OP

EN

DR

AIN

29 Oct

ober

200

9 | P

rinte

d in

U.S

.A. |

© A

. O. S

mith

Fo

r Tec

hnic

al In

form

atio

n an

d A

utom

ated

Fax

Ser

vice

, cal

l 800

-527

-195

3 or

vis

it w

ww

.hot

wat

er.c

om.

AO

SC

G61

150

| PAG

E 1

of 1

A

. O. S

mith

Cor

pora

tion

rese

rves

the

right

to m

ake

prod

uct c

hang

es o

r im

prov

emen

ts w

ithou

t prio

r not

ice.

NO

TES

:1.

P

refe

rred

pip

ing

diag

ram

.2.

Th

e te

mpe

ratu

re a

nd p

ress

ure

relie

f val

ve s

ettin

g sh

all n

ot e

xcee

d pr

essu

re ra

ting

of a

ny c

ompo

nent

in th

e sy

stem

.3.

S

ervi

ce v

alve

s ar

e sh

own

for s

ervi

cing

uni

t. H

owev

er, l

ocal

cod

es s

hall

gove

rn th

eir u

sage

.4.

Th

e Ta

nk T

empe

ratu

re C

ontro

l sho

uld

be w

ired

to a

nd c

ontro

l the

pum

p be

twee

n th

e w

ater

hea

ter(

s) a

nd th

e st

orag

e ta

nk(s

).5.

Th

e w

ater

hea

ter’s

ope

ratin

g th

erm

osta

t sho

uld

be s

et 5

deg

rees

F h

ighe

r tha

n th

e Ta

nk T

empe

ratu

re C

ontro

l.

SIN

GLE

FLU

E -

(1 U

NIT

) WIT

H H

OR

IZO

NTA

L S

TOR

AG

E T

AN

K

LEG

EN

DTE

MP

ER

ATU

RE

& P

RE

SS

UR

ER

ELI

EF

VALV

E

PR

ES

SU

RE

RE

LIE

F VA

LVE

CIR

CU

LATI

NG

PU

MP

TAN

K TE

MPE

RAT

UR

E C

ON

TRO

L

DR

AIN

FULL

PO

RT

BA

LL V

ALV

E

TEM

PE

RAT

UR

E G

AG

E

WAT

ER

FLO

W S

WIT

CH

CH

EC

K V

ALV

EW

AR

NIN

G: T

HIS

DR

AWIN

G S

HO

WS

SU

GG

ES

TED

PIP

ING

CO

NFI

GU

RAT

ION

AN

D O

THE

R D

EV

ICE

S;

CH

EC

K W

ITH

LO

CA

L C

OD

ES

AN

D O

RD

INA

NC

ES

FOR

AD

DIT

ION

AL

RE

QU

IRE

ME

NTS

.

FIN

ISH

ED

FLO

OR

HO

TC

OLD

EX

PA

NS

ION

TAN

K

CO

LD W

ATE

RS

UP

PLY

HO

T W

ATE

RR

ETU

RN

FR

OM

FI

XTU

RE

S

HO

T W

ATE

RTO

FIX

TUR

ES

ALT

ER

NA

TELO

CA

TIO

N

PIP

E T

&P

TO

OP

EN

DR

AIN

30 Oct

ober

200

9 | P

rinte

d in

U.S

.A. |

© A

. O. S

mith

F

or T

echn

ical

Info

rmat

ion

and

Aut

omat

ed F

ax S

ervi

ce, c

all 8

00-5

27-1

953

or v

isit

ww

w.h

otw

ater

.com

. A

OS

CG

6116

0 | P

AG

E 1

of 1

A

. O. S

mith

Cor

pora

tion

rese

rves

the

right

to m

ake

prod

uct c

hang

es o

r im

prov

emen

ts w

ithou

t prio

r no

tice.

NO

TE

S:

1.

Pre

ferr

ed

pip

ing

dia

gra

m.

2.

Th

e t

em

pe

ratu

re a

nd

pre

ssu

re r

elie

f va

lve

se

ttin

g s

ha

ll n

ot

exc

ee

d p

ress

ure

ra

ting

of

an

y co

mp

on

en

t in

th

e s

yste

m.

3.

Se

rvic

e v

alv

es

are

sh

ow

n f

or

serv

icin

g u

nit.

Ho

we

ver,

loca

l co

de

s sh

all

go

vern

th

eir

usa

ge

.4

. T

he

Ta

nk

Tem

pe

ratu

re C

on

tro

l sh

ou

ld b

e w

ire

d t

o a

nd

co

ntr

ol t

he

pu

mp

be

twe

en

th

e w

ate

r h

ea

ter(

s) a

nd

th

e s

tora

ge

ta

nk(

s).

5.

Th

e w

ate

r h

ea

ter’

s o

pe

ratin

g t

he

rmo

sta

t sh

ou

ld b

e s

et

5 d

eg

ree

s F

hig

he

r th

an

th

e T

an

k Te

mp

era

ture

Co

ntr

ol.

SIN

GL

E F

LU

E -

(1

UN

IT)

WIT

H M

IXIN

G V

ALV

E T

WO

TE

MP

ER

AT

UR

E

LEG

EN

DT

EM

PE

RA

TU

RE

& P

RE

SS

UR

ER

ELI

EF

VA

LVE

PR

ES

SU

RE

RE

LIE

F V

ALV

E

CIR

CU

LAT

ING

PU

MP

TAN

K T

EM

PE

RA

TU

RE

CO

NT

RO

L

DR

AIN

FU

LL P

OR

T B

ALL

VA

LVE

TE

MP

ER

AT

UR

E G

AG

E

WA

TE

R F

LOW

SW

ITC

H

CH

EC

K V

ALV

EW

AR

NIN

G: T

HIS

DR

AW

ING

SH

OW

S S

UG

GE

ST

ED

PIP

ING

CO

NF

IGU

RA

TIO

N A

ND

OT

HE

R D

EV

ICE

S;

CH

EC

K W

ITH

LO

CA

L C

OD

ES

AN

D O

RD

INA

NC

ES

FO

R A

DD

ITIO

NA

L R

EQ

UIR

EM

EN

TS

.

HO

T W

AT

ER

RE

TU

RN

MIN

IMU

M10

´́ to

12´́

HO

T W

AT

ER

OU

TLE

TT

EM

PE

RE

DW

AT

ER

RE

TU

RN

TE

MP

ER

ED

WA

TE

RO

UT

LET

CO

LD W

AT

ER

SU

PP

LYLI

NE

TE

MP

ER

AT

UR

EC

ON

TR

OL

CO

LDH

OT

EX

PA

NS

ION

TA

NK

PIP

E T

&P

TO

OP

EN

DR

AIN

2193

32_A

OS

CG

6116

0.in

dd

112

/9/0

9 1

1:24

:14

AM

31 Oct

ober

200

9 | P

rinte

d in

U.S

.A. |

© A

. O. S

mith

Fo

r Tec

hnic

al In

form

atio

n an

d A

utom

ated

Fax

Ser

vice

, cal

l 800

-527

-195

3 or

vis

it w

ww

.hot

wat

er.c

om.

AO

SC

G61

170

| PAG

E 1

of 1

A

. O. S

mith

Cor

pora

tion

rese

rves

the

right

to m

ake

prod

uct c

hang

es o

r im

prov

emen

ts w

ithou

t prio

r not

ice.

NO

TES

:1.

P

refe

rred

pip

ing

diag

ram

.2.

Th

e te

mpe

ratu

re a

nd p

ress

ure

relie

f val

ve s

ettin

g sh

all n

ot e

xcee

d pr

essu

re ra

ting

of a

ny c

ompo

nent

in th

e sy

stem

.3.

S

ervi

ce v

alve

s ar

e sh

own

for s

ervi

cing

uni

t. H

owev

er, l

ocal

cod

es s

hall

gove

rn th

eir u

sage

.4.

Th

e Ta

nk T

empe

ratu

re C

ontro

l sho

uld

be w

ired

to a

nd c

ontro

l the

pum

p be

twee

n th

e w

ater

hea

ter(

s) a

nd th

e st

orag

e ta

nk(s

).5.

Th

e w

ater

hea

ter’s

ope

ratin

g th

erm

osta

t sho

uld

be s

et 5

deg

rees

F h

ighe

r tha

n th

e Ta

nk T

empe

ratu

re C

ontro

l.

SIN

GLE

FLU

E -

(2 U

NIT

S)

LEG

EN

DTE

MP

ER

ATU

RE

& P

RE

SS

UR

ER

ELI

EF

VALV

E

PR

ES

SU

RE

RE

LIE

F VA

LVE

CIR

CU

LATI

NG

PU

MP

TAN

K TE

MPE

RAT

UR

E C

ON

TRO

L

DR

AIN

FULL

PO

RT

BA

LL V

ALV

E

TEM

PE

RAT

UR

E G

AG

E

WAT

ER

FLO

W S

WIT

CH

CH

EC

K V

ALV

EW

AR

NIN

G: T

HIS

DR

AWIN

G S

HO

WS

SU

GG

ES

TED

PIP

ING

CO

NFI

GU

RAT

ION

AN

D O

THE

R D

EV

ICE

S;

CH

EC

K W

ITH

LO

CA

L C

OD

ES

AN

D O

RD

INA

NC

ES

FOR

AD

DIT

ION

AL

RE

QU

IRE

ME

NTS

.

FIN

ISH

ED

FLO

OR

HO

T W

ATE

R

TO F

IXTU

RE

S

HO

TC

OLD

HO

T

HO

T W

ATER

RET

UR

NFR

OM

FIX

TUR

ES

CO

LD

CO

LD W

ATE

RS

UP

PLY

EX

PA

NS

ION

TAN

K

PIP

E T

&P

TO

OP

EN

DR

AIN

PIP

E T

&P

TO

OP

EN

DR

AIN

32 Oct

ober

200

9 | P

rinte

d in

U.S

.A. |

© A

. O. S

mith

Fo

r Tec

hnic

al In

form

atio

n an

d A

utom

ated

Fax

Ser

vice

, cal

l 800

-527

-195

3 or

vis

it w

ww

.hot

wat

er.c

om.

AO

SC

G61

180

| PAG

E 1

of 1

A

. O. S

mith

Cor

pora

tion

rese

rves

the

right

to m

ake

prod

uct c

hang

es o

r im

prov

emen

ts w

ithou

t prio

r not

ice.

NO

TES

:1.

P

refe

rred

pip

ing

diag

ram

.2.

Th

e te

mpe

ratu

re a

nd p

ress

ure

relie

f val

ve s

ettin

g sh

all n

ot e

xcee

d pr

essu

re ra

ting

of a

ny c

ompo

nent

in th

e sy

stem

.3.

S

ervi

ce v

alve

s ar

e sh

own

for s

ervi

cing

uni

t. H

owev

er, l

ocal

cod

es s

hall

gove

rn th

eir u

sage

.4.

Th

e Ta

nk T

empe

ratu

re C

ontro

l sho

uld

be w

ired

to a

nd c

ontro

l the

pum

p be

twee

n th

e w

ater

hea

ter(

s) a

nd th

e st

orag

e ta

nk(s

).5.

Th

e w

ater

hea

ter’s

ope

ratin

g th

erm

osta

t sho

uld

be s

et 5

deg

rees

F h

ighe

r tha

n th

e Ta

nk T

empe

ratu

re C

ontro

l.

SIN

GLE

FLU

E -

(2 U

NIT

S) T

WO

TE

MP

ER

ATU

RE

ON

E P

RE

-HE

ATE

R/O

NE

BO

OS

TER

HE

ATE

R

LEG

EN

DTE

MP

ER

ATU

RE

& P

RE

SS

UR

ER

ELI

EF

VALV

E

PR

ES

SU

RE

RE

LIE

F VA

LVE

CIR

CU

LATI

NG

PU

MP

TAN

K TE

MPE

RAT

UR

E C

ON

TRO

L

DR

AIN

FULL

PO

RT

BA

LL V

ALV

E

TEM

PE

RAT

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33

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34

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35

Model Bl limited warrantyA.O.SmithCorporation,thewarrantor,extendsthefollowingLIMITEDWARRANTYtotheownerofthiswaterheater.

1. THE TANk Iftheglass-linedtankinthiswaterheatershallproveuponexaminationbythewarrantortohaveleakedduetonaturalcorrosionfrompotablewatertherein,duringthefirstTHREEyearsafterinitialinstallation,thewarrantorwillsupplyacompletenewA.O.Smithwaterheaterofequivalentsizeandcurrentmodel.Somegovernmentagenciesarerequiringenergyefficientstandardsforwaterheaters.Intheeventregulationsprohibitsaleofamodelofequivalentsizeandconstruction,A.O.Smithwillprovideamodelwhichcomplieswiththeregulationsofyourarea,inwhichcasetheconsumerwillbechargedthedifferenceinpricebetweenthelikereplacementandtheenergyefficientmodelrequired.Thewarrantyonthereplacementwaterheaterwillbelimitedtotheunexpiredtermoftheoriginalwarranty.

2. All OTHER PARTS IfwithinONEyearafterinitialinstallationofthiswaterheater,anypartorportionshallproveuponexaminationbythewarrantortobedefectiveinmaterialorworkmanship,thewarrantorwillrepairorreplacesuchpartorportionatitsoption.

3. cONDITIONS AND EXcEPTIONS Thiswarrantyshallapplyonlywhenthewaterheaterisinstalledinaccordancewithlocalplumbingandbuildingcodes,ordinancesandregulations,theprintedinstructionsprovidedwithitandgoodindustrypractices.Inaddition,atemperatureandpressurereliefvalve,certifiedbyandofficiallysanctionedandrecognizedindependenttestingagencyandapprovedbytheAmericanSocietyofMechanicalEngineers,musthavebeeninstalled.

a. Thiswarrantyshallapplyonlywhentheheateris: (1) usedattemperaturesnotexceedingthemaximumcalibratedsettingofitsthermostat; (2) usedatwaterpressurenotexceedingtheworkingpressureshownontheheater; (3) filledwithpotablewater,freetocirculateatalltimesandwiththetankfreeofdamagingwatersedimentorscaledeposits; (4) usedinanon-corrosiveandnon-contaminatedatmosphere; (5) usedwithfactoryapprovedanode(s)installed; (6) initsoriginalinstallationlocation; (7) intheUnitedStates,itsterritoriesorpossessions; (8) sizedinaccordancewithpropersizingtechniquesforcommercialand/orresidentialwaterheaters; (9) bearingaratingplatewhichhasnotbeenaltered,defacedorremoved,exceptasrequiredbythewarrantor; (10) usedinanopensystemorinaclosedsystemwithproperlysizedandinstalledthermalexpansiontank; (11) operatedwithproperlyinstalledsedimenttrap; (12) firedwiththefuelforwhichitwasfactorybuilt; (13) firedatthefactoryratedinput; (14) operatedwiththeinnerandoutercombustionchamberdoorsinplace. b. Anyaccidenttothewaterheater,anymisuse,abuse(includingfreezingorthermalexpansiondamage)oralterationof,anyoperationina

modifiedform,oranyattempttorepairtankleakswillvoidthiswarranty. c. Thiswarrantyisvoidifadeviceactingasabackflowpreventiondevice(checkvalvesetc.)isinstalledinthecoldwatersupplytheheateris

connectedto,unlessaneffectivemethodofcontrollingthermalexpansionisalsoinstalledattheheater(s)andoperationalatalltimes.Thereliefvalveinstalledontheheaterisnotanacceptablemethod.

4. SERVIcE AND REPAIR EXPENSES Underthelimitedwarrantythewarrantorwillprovideonlyareplacementwaterheaterorpartthereof.Theownerisresponsibleforallothercosts.Suchcostsmayincludebutarenotlimitedto:

a. Laborchargesforserviceremoval,repairorreinstallationofthewaterheateroranycomponentpart; b. Shipping,delivery,handling,andadministrativechargesforforwardingthenewheaterorreplacementpartfromthenearestdistributorand

returningtheclaimeddefectiveheaterorparttosuchdistributor. c. Allcostnecessaryorincidentalforanymaterialand/orpermitsrequiredforinstallationofthereplacementheaterorpart.

5. lIMITATIONS ON IMPlIED WARRANTIES Impliedwarranties,includingthewarrantyofmerchantabilityimposedonthesaleofthisheaterunderstatelawarelimitedtoone(1)yeardurationfortheheateroranyofitsparts.Somestatesdonotallowlimitationonhowlonganimpliedwarrantylasts,sotheabovelimitationmaynotapplytoyou.

6. clAIM PROcEDURE Anyclaimunderthewarrantyshouldbeinitiatedwiththedealerwhosoldtheheater,orwithanyotherdealerhandlingthewarrantor’sproducts.Ifthisisnotpracticable,theownershouldcontact:

U.S.Customers CanadianCustomers A.O.SmithCorporation A.O.SmithEnterprisesLtd. 500 Tennessee Waltz Parkway 768 Erie Street AshlandCity,TN37015 Stratford(Ontario)N5A6T3 Telephone:(800)527-1953 Telephone:(800)265-8520

a. Thewarrantorwillonlyhonorreplacementwithidenticalorsimilarwaterheaterorpartsthereofwhicharemanufacturedordistributedbythewarrantor. b. Dealerreplacementsaremadesubjecttoin-warrantyvalidationbywarrantor.

7. DISclAIMERS NO OTHER EXPRESS WARRANTY HAS BEEN OR WIll BE MADE IN BEHAlf Of THE WARRANTOR WITH RESPEcT TO THE MERcHANT-

ABIlITY Of THE HEATER OR THE INSTAllATION, OPERATION, REPAIR OR REPlAcEMENT Of THE HEATER. THE WARRANTOR SHAll NOT BE RESPONSIBlE fOR WATER DAMAGE, lOSS Of USE Of THE UNIT, INcONVENIENcE, lOSS OR DAMAGE TO PERSONAl PROPERTY OR OTHER cONSEqUENTIAl DAMAGE. THE WARRANTOR SHAll NOT BE lIABlE BY VIRTUE Of THIS WARRANTY OR OTHERWISE fOR DAMAGE TO ANY PERSONS OR PROPERTY, WHETHER DIREcT OR INDIREcT, AND WHETHER ARISING IN cONTRAcT OR IN TORT.

a. Somestatesdonotallowtheexclusionorlimitationoftheincidentalorconsequentialdamage,sotheabovelimitationsorexclusionsmaynot apply to you.

b. Thiswarrantygivesyouspecificlegalrights,andyoumayalsohaveotherrightswhichvaryfromstatetostate.

Fillinthefollowingforyourownreference.Keepit.Registrationisnotaconditionofwarranty.Themodelandserialnumberarefoundontheheater’sratingplate.

Model No. ________________________Serial No. __________________________________________________ Date Installed _____________Dealer’sName ________________________________________________________________________________________________________Dealer’sAddress ___________________________________________________________________________Phone No. __________________city and State _____________________________________________________________________________Zip ________________________

kEEP THIS WARRANTY POSTED ADjAcENT TO THE HEATER fOR fUTURE REfERENcE.

ultra low nox commercial gas water heaters

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