State 520 User Manual

‐Do not store or use gasoline or otherflammablevaporsandliquidsinthevicinityofthisoranyotherappliance.‐WHATTODOIFYOUSM

Installation10│PageImproperventingofthisappliancecanresultinexcessivelevelsofcarbonmonoxidewhichcanresultinseverepersonalinjury

Installation11│PageExcludeselbowtermination,raincaps,orthe3”PVCConcentricTerminationFordetailsontheventconnectiontotheDirectVen

Installation12│PageImproperinstallationcancausenauseaorasphyxiation,severeinjuryordeathfromcarbonmonoxideandfluegasespoisoning.Im

Installation13│Page1. ConnectthePVCadaptor*directlyontheexhaustventcollarofthewaterheater.2. Connecta4”PVCcoupler(or4x3”PVCr

Installation14│Page1. Connecta4”PVCStraightpipedirectlyontheintakeventcollarofthewaterheater.2. Connecta4x3”PVCreducertothe

Installation15│Page‐Ventclearances‐ Canada U.S.ADirectventandotherthanDirectVentDirectvent OtherthanDirectVent

Installation16│Page‐Additionalclearances‐Pleasefollowalllocalandnationalcodesinregardstoproperterminationclearances.Intheabsence

Installation17│Page1. Turnoffallelectricpowertothewaterheaterifserviceistobeperformed.2. Turnthemanualgasvalvelocatedonth

Installation18│Page‐NaturalGasSupplyPiping‐MaximumDeliveryCapacityofCubicFeetofGasperHourofIPSPipeCarryingNaturalGasof0.60Spe

Installation19│Page1.Turnoffallelectricpowertothewaterheaterifserviceistobeperformed.2.Turnthemanualgasvalvelocatedontheout

Contents2│PageNOTE Checktheratingplatetoensurethisproductmatchesyourspecifications. In accordance with ANZI Z21.10.3, CO emiss

Installation20│Page‐Pressurereliefvalve‐Thewaterheaterhasahigh‐temperatureshutoffswitchbuiltinas a standard safety feature(call

Installation21│Page ‐CondensateDrainConnections‐Thewaterheatermodelsarehighefficiencycondensingwaterheatersthatproducecondensat

Installation22│Page The condensate drain is at atmospheric pressure (non‐pressurized) andtherefore must be allowed to drain  freely

Installation23│PageREMOTECONTROLLERCONNECTION1.Disconnectpowersupplyfromthewaterheater.2.Takeoffthewaterheater’sfro

Installation24│PageInanEasy‐Linksystem,thepumpmustbeconnectedtothe“Pumpconnector”inthe“PARENTunit”only.Ifthepumpisconnectedt

Installation25│PagePUMPCONTROLMODE Thewaterheaterprovidesthefourtypesofthepumpcontrolmodes.Thepu mpcontrolmode sareselectedby

Installation26│PageD)NormalControl(Defaultsetting):No.5andNo.6OFFFeature:Thismodeprovidesnospecialpumpcontrol.Pumpactivationca

Installation27│Page TheEasy‐Linksystemislimitedupto4units.Ifyouconnectmorethan4units,onlythefirst4unitswillworkasapartof

Installation28│PageThedarksquaresindicatethedirectionthedipswitchesshouldbesetto. 4.Betweenthe“PARENT”andthe“CHILD‐1”unitsConnec

Installation29│Page CASE1: UnlessyouchangedipswitchNo.10ofthe“PARENT”unittothe“ON”position,thesystemwillnotworkasanEasy‐Lin

Introduction3│PageINTRODUCTION *Thisdiagramillustratestanklesswaterheaterdesignconceptsonl

Installation30│PageConnectingtwo“PARENTconnectors”togetherfromtwoseparateunitsmaydamagethecomputerboard.Thecommunicationcablehas

Applications31│Page In orderto purgeair in water pipe s within a closed‐loop system, an air vent andairseparator should be

Applications32│Page ‐Dual‐purposehotwaterheating‐(DomesticandSpaceHeating):*Thecirculationpumpistoprovidenoless

InitialOperation33│Page Che cktheGASandWATERCONNECTIONSforleaksbeforefiringunitforthefirsttime. Openthemaingassupplyvalv

OperatingSafety34│Page OPERATINGSAFETY FORYOURSAFETYREADBEFOREOPERATINGWARNING:Ifyoudonotfollowtheseinstructionsexactly,afireore

OperatingSafety35│Page  DANGER Vaporsfromflammableliquidswillexplodeandcatchfirecausingdeathorsevereburns.Donotuseorstorefla

NormalOperation36│Page Thewaterheaterwilldisplaythesettemperatureonthe3‐digit7‐Seg.LEDonthecomputerboard.ThisLEDisvisibleth

NormalOperation37│PageDO NOT set to185 °F if you use your water heater in a recirculation system. Thiswillcausedamagetothehe

NormalOperation38│PageOnlypipeswithinthewaterheaterareprotectedbythefreezeprotectionsystem.Anywaterpipes(hotorcold)located ou

NormalOperation39│PageTurnofftheelectricalpowersupplyandclosethemanualgasshutoffvalveandthemanualwatercontrolvalvebeforeservic

SafetyGuidelines4│Page  Watertemperaturesover125°F(52°C)cancausesevereburnsinstantlyordeathfromscalding.Thewatertemperatureis

Troubleshooting40│PageGENERAL TROUBLESHOOTING PROBLEM SOLUTIONS‐TEMPERATUREandAMOUNTOFHOTWATER‐Ittakeslongtimetogethotwateratthe

Troubleshooting41│Page PROBLEM SOLUTIONS‐WATERHEATER‐Unitdoesnotignitewhenwatergoesthroughtheunit. Istheflowrateover0.5

Troubleshooting42│Page ERRORCODES Theunitsareselfdiagnosticforsafetyandconveniencewhentroubleshooting. Ifthereisaproblemwith

Troubleshooting43│Page ‐FAULTANALYSISOFERRORCODES‐ Ifthereisaproblemwiththeinstallationofthewaterheater,itwilldisplayanumeric

ComponentsDiagram44│PageCOMPONENTSDIAGRAM CaseassemblyDirectVentIndoormodelsOutdoormodels0010070540067030520040030527021520050020510080090

ComponentsDiagram45│Page BurnerassemblyComputerboardassembly709423710720114711704705

ComponentsDiagram46│PageA4014024034044074084094104114124134144154164174184194204144214224234244254284144294144364304324334194344354384404414427064

PartsList47│PagePARTSLIST Item# DescriptionPart#520and320modelsT‐H2 andT‐H2Smodels001002003004005CaseassemblyforDirectVentInd

PartsList48│Page Item# DescriptionPart#520and320modelsT‐H2andT‐H2Smodels127128HeatexchangerO‐ringP20NBR319143‐056319143‐057EX12ZEK

PartsList49│Page Item# DescriptionPart#520and320modelsT‐H2andT‐H2Smodels442443444445446Hi‐limitswitchforexhaustFastener“14‐2

Installation5│Page Installation and service must be performed by a qualified installer (forexample, a licensed plumber or gas fit

OutputTemperatureChart‐50‐│PageOUTPUTTEMPERATURECHARTOutput Temperature vs. GPM (Max. 9.0 GPM) with Various Ground Water TemperatureChart is

Warranty‐51‐│PageLIMITEDWARRANTY1. Generaltermsoflimitedwarranty:Thislimitedwarrantygivesyouspecificlegalrights,andyoumayalso

Warranty‐52‐│Page3. Repair,ReplacementorRefund:The manufacturer or its authorized Service Representative will, at its sole discre

Installation6│PageGENERAL1. Follow all local codes, or in the absence of local codes, follow the most recent edition of theNat

Installation7│Page OPTIONALITEMS 1.TemperatureRemoteController:9007603005(TM‐RE30)The Temperature Remote Controller has two function

Installation8│PageWARNINGFORINSTALLATIONS FORYOURSAFETY,READBEFOREINSTALLATION:Do not install the heater where water, debris orfl

Installation9│PageThedarksquaresindicatethedirectionthedipswitchesshouldbesetto. LeftbankofdipswitchesLeftbankofdipswitches Th