Takagi T?KJr2?IN User manual

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‐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SMELLGAS
•Donottrytolightanyappliance.
•Donottouchanyelectricswitch,donot
useanyphoneinyourbuilding.
•Immediatelycallyourgassupplierfroma
neighbor'sphone.Followthegas
supplier'sinstructions.
•Ifyoucannotreachyourgassupplier,call
thefiredepartment.
‐Installationandservicemustbeperformed
byaqualifiedinstaller,serviceagencyorthe
gassupplier.
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TAKAGI
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FEATURING
•ENDLESSHOTWATER
•ONDEMANDUSAGE
•COMPACT,SPACESAVING
•ENERGYCONSERVATION
•COMPUTERIZEDSAFETY
•NOPILOTLIGHT
•EASY‐LINKSYSTEM(OnlyT‐D2‐IN&T‐D2‐OS)
GasTanklessWaterHeater
Suitableforpotablewaterheatingandspace‐heating *
*Pleaserefertolocalcodesforspace‐heatingcompliance.
Ifyouhaveanyquestions,please
callorwriteto:
5Whatney
Irvine,CA92618
TollFree:1‐888‐882‐5244
On‐DemandWaterHeater
InstallationManualandOwner’sGuide
Model
・T‐KJr2‐IN・T‐KJr2‐OS
・T‐K4‐IN・T‐K4‐OS
・T‐D2‐IN・T‐D2‐OS
WARNING
Iftheinformationinthese
instructionsisnotfollowed
exactly,afireorexplosion
mayresultcausing
propertydamage,personalinjuryordeath.
“ANSIZ21.10.3”
and“CSA4.3”
OnlyT‐D2models

Contents
2│Page
CONTENTS
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SPECIFICATIONS…………………………………………………………………………………………..………………………...
INTRODUCTION…………………………………………………………………………………………………..………………….
SAFETYGUIDELINES…………….………………………………………………………………………………………..………..
INSTALLATION………………………………………………………………………………………………..…………………..….
General………………………………………………………………………………………………………………………..…..…
Clearances……………………………………………………………………………………………………………………………
IncludedAccessories…………….………………………………………………………………………………………..…..
OptionalItems……………………………………………………………………………………………………………………..
High‐AltitudeInstallations……………………………………………………………………………………………………
.
VentingInstructions…………………………………………………………………………………………………………….
.
GasSupplyandGasPipeSizing………......................................................................................…
WaterConnections……………..…………………………………………………………………………………………….…
ElectricalConnections……………………………………………………………………..…………………………….......
RemoteControllerConnections.……..……………………………………………………………………………….…
PumpControlMode(OnlyT‐D2‐IN&T‐D2‐OS)………………………….……………………………….………
Easy‐LinkSystem(OnlyT‐D2‐IN&T‐D2‐OS)…….……………………...…………………………………..…....
APPLICATIONS...………………………………………………………………………………………………………………………
INITIALOPERATION..………………………………………………………………………………………………………….……
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OPERATINGSAFETY…………………………………………………………………………………………………………………
NORMALOPERATION…………………………………………………………………………………………………………..…
General………..……….………….…………………………………………………………………………………………………
TemperatureSettings.…….……..……………………………………………………………………………………………
Flow…………………………………………………………………………………………………………………………………….
FreezeProtectionSystem…….…………………………………………………………………………………………..…
MaintenanceandService………………………………………………………………………………………………….…
UnitDrainingandFilterCleaning…………………………………………………………………………………………
TROUBLESHOOTING……..……………………………………………………………………………………………………..…
General………..……….………….…………………………………………………………………………………………………
ErrorCodes.…………………….…..………………………………………………………………………………………………
COMPONENTSDIAGRAM……………………………………………………………………………………………………..…
PARTSLIST………………….………………………………………………………………………………………………..…………
OUTPUTTEMPERATURECHART…………………………………………………………………………………………...…
PRODUCTREGISTRATIONANDLIMITEDWARRANTY…………....…………………………………………….…
…
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InstallationManual
Owne
r
’sGuide

Specifications
3│Page
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SPECIFICATIONS
ModelT‐KJr2‐INT‐KJr2‐OST‐K4‐INT‐K4‐OST‐D2‐INT‐D2‐OS
NaturalGasInput
(OperatingRange)
Min:19,500Btu/h
Max:140,000Btu/h
Min:11,000Btu/h
Max:190,000Btu/h
Min:11,000Btu/h
Max:199,000Btu/h
PropaneInput
(OperatingRange)
Min:19,500Btu/h
Max:140,000Btu/h
Min:11,000Btu/h
Max:190,000Btu/h
Min:11,000Btu/h
Max:199,000Btu/h
GasConnection¾”NPT
WaterConnections¾”NPT
WaterPressure15‐150psi*
NaturalGas
InletPressure
Min.5.0”WC
Max.10.5”WC
Propane
InletPressure
Min.8.0”WC
Max.14.0”WC
Manifold
Pressure**
Natural2.0”WC 2.5”WC2.0”WC 2.5”WC2.0”WC2.5”WC
Propane2.5”WC3.1”WC3.7”WC4.0”WC3.7”WC4.5”WC
Weight28.7lbs.34.6lbs.
Dimensions H20.5”xW13.8”xD6.7” H20.5”xW13.8”xD8.5”
IgnitionElectricIgnition
Electric
Supply120VAC/60Hz
Consumption
Operation73.1W/0.61A87.6W/0.73A89.8W/0.75A
Standby6.2W/0.05A6.2W/0.05A6.2W/0.05A
Freeze‐
Protection111W/0.93A111W/0.93A111W/0.93A
*40psioraboveisrecommendedformaximumflow.
**TheManifoldPressureisthefactorysettingandgenerallyshouldnotneedadjustment.
NOTE:
•Checktheratingplatetoensurethisproductmatchesyourspecifications.
•InaccordancewithANSIZ21.10.3,COemissiondoesnotexceed400PPMfor
normalinput.
•Themanufacturerreservestherighttodiscontinue,orchangeatanytime,
specificationsordesignswithoutnoticeandwithoutincurringobligations.
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Introduction
4│Page
INTRODUCTION
*Thisdiagram
illustratestankless
waterheaterdesign
conceptsonlyand
doesnotaccurately
representtothewater
heater’sphysical
description.
•Thismanualprovidesinformationnecessaryfortheinstallation,operation,and
maintenanceofthewaterheater.
•Themodeldescriptionislistedontheratingplatewhichisattachedtothefrontpanel
ofthewaterheater.
•Pleasereadallinstallationinstructionscompletelybeforeinstallingthisproduct.
•Ifyouhaveanyproblemsorquestionsregardingthisequipment,consultwiththe
manufactureroritslocalrepresentative.
•Thisequipmentisanon‐demand,tanklesswaterheaterdesignedtoefficientlysupply
endlesshotwaterforyourneeds.
•Theprinciplebehindtanklesswaterheatersissimple:
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1. Ahotwatertapisturnedon.
2. Waterenterstheheater.
3. Thewaterflowsensordetectsthewaterflow.
4. Thecomputerinitiatesthefanmotorandsendsasignaltotheignitertocreateanignition
spark.
5. Thegasignitesandflamesappearwithintheburnerchamber.
6. Watercirculatesthroughtheheatexchangerandthengetshot.
7. Usingthermistorstomeasuretemperaturesthroughoutthewaterheater,thecomputer
modulatesthegasandwatervalvestoensureproperoutputwatertemperature.
8. Whentheta
p
isturnedoff
,
theunitshutsdown.
•TheT‐KJr2‐IN,T‐K4‐IN,&T‐D2‐INaretobeonlyinstalledindoor(direct‐vent
convertible).TheT‐KJr2‐OS,T‐K4‐OS,&T‐D2‐OSaretobeonlyinstalledoutdoor.

SafetyGuidelines
5│Page
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•Watertemperaturesover125°F (52
°
C) cancausesevereburnsinstantlyordeath
fromscalding.Thewatertemperatureissetat122°F(50°C)fromthefactoryto
minimizeanyscaldingrisk.Beforebathingorshoweringalwayscheckthewater
temperature.
•Donotstoreorusegasolineorotherflammables,vapors,orliquidsinthevicinity
ofthisappliance.
•Donotreversethewaterand/orgasconnectionsasthiswilldamagethegas
valvesandcancausesevereinjuryordeath.Followthediagramonp.20when
installingyourwaterheater.
•Donotusethisapplianceifanyparthasbeenincontactwithorbeenimmersed
inwater.Immediatelycallalicensedplumber,alicensedgasfitter,ora
professionalservicetechniciantoinspectand/orservicetheunitifnecessary.
•Donotdisconnecttheelectricalsupplyiftheambienttemperaturewilldrop
belowfreezing.TheFreezePreventionSystemonlyworksiftheunithaselectrical
power.Thewarrantywillnotbecoverediftheheatexchangerisdamageddueto
freezing.RefertothesectionontheFreezePreventionSystemonp.35formore
information.
SAFETYGUIDELINES

SAFETYDEFINITIONS
Indicatesanimminentlyhazardoussituationwhich,ifnotavoided,willresultin
deathorseriousinjury.
Indicatesanimminentlyhazardoussituationwhich,ifnotavoided,couldresult
indeathorseriousinjury.
Indicatesanimminentlyhazardoussituationwhich,ifnotavoided,couldresult
inminorormoderateinjury.
GENERAL
1. Followalllocalcodes,orintheabsenceoflocalcodes,followthemostrecenteditionofthe
NationalFuelGasCode:ANSIZ223.1/NFPA54intheUSAorCAN/CSAB149.1NaturalGas,Propane
InstallationCodeinCanada.
2. Properlygroundtheunitinaccordancewithalllocalcodesorintheabsenceoflocalcodes,with
theNationalElectricalCodes:ANSI/NFPA70intheUSAorCSAstandardC22.1CanadaElectrical
CodePart1inCanada.
3. Carefullyplanwhereyouintendtoinstallthewaterheater.Pleaseensure:
•Yourwaterheaterwillhaveenoughcombustibleairandproperventilation.
•Locateyourheaterwherewaterleakagewillnotdamagesurroundingareas(pleaserefer
top.7).
4. ChecktheratingplateforthecorrectGASTYPE,GASPRESSURE,WATERPRESSUREandELECTRIC
RATING.
*Ifthisunitdoesnotmatchyourrequirements,donotinstallandconsultwiththe
manufacturer.
5. Ifanyproblemshouldoccur,turnoffallhotwatertapsandturnoffthegas.Thencallatrained
technicianortheGasCompanyorthemanufacturer.
WARNING
CAUTION
DANGER
WARNING

Installation
6│Page
INSTALLATION
GENERAL

1. Followalllocalcodes,orintheabsenceoflocalcodes,followthemostrecenteditionofthe
NationalFuelGasCode:ANSIZ223.1/NFPA54intheUSAorCAN/CSAB149.1NaturalGas,
PropaneInstallationCodeinCanada.

2. Allgaswaterheatersrequirecarefulandcorrectinstallationtoensuresafeandefficient
operation.Thismanualmustbefollowedexactly.Readthe“SafetyGuidelines”section.
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3. Themanifoldgaspressureispresetatthefactory.Itiscomputercontrolledandshouldnot
needadjustment.

4. Maintainproperspaceforservicing.Installtheunitsothatitcanbeconnectedorremoved
easily.RefertotheClearancesSectiononp.8forproperclearances.

5. Thewaterheatermustbeinstalledinalocationwheretheproperamountofcombustibleair
willbeavailabletoitatalltimeswithoutobstructions.

6. Theelectricalconnectionrequiresameansofdisconnection,toterminatepowertothewater
heaterforservicingandsafetypurposes.

7. Donotinstalltheunitwheretheexhaustventispointingintoanyopeninginabuildingorwhere
thenoisemaydisturbyourneighbors.Makesuretheventterminationmeetstherequired
distancebylocalcodefromanydoorwayoropeningtopreventexhaustfromenteringabuilding
(refertop.15).

8. Particlesfromflour,aerosols,andothercontaminantsmayclogtheairventorreducethe
functionsoftherotatingfanandcauseimproperburningofthegas.Regularlyensurethatthe
areaaroundtheunitisdust‐ordebris‐free;regularmaintenanceisrecommendedforthese
typesofenvironment.

9. Ifyouwillbeinstallingthewaterheaterinacontaminatedareawithahighlevelofdust,sand,
flour,aerosolsorothercontaminants/chemicals,theycanbecomeairborneandenterandbuild
upwithinthefanandburnercausingdamagetothewaterheater.

10. FortheT‐KJr2‐IN,T‐K4‐IN,andT‐D2‐INmodels:
•Theseunitsmaybeconvertedtoadirect‐vent(sealedcombustion)appliancebyinstallinga
direct‐ventconversionkit(PartNo.TK‐TV10)whichwillbringinallrequiredcombustibleair
fromoutsidethebuilding.WheninstallingtheTK‐TV10conversionkit,pleasefollowall
instructionsincludedwiththekit.
•Ifthewaterheaterisusedasadirect‐ventappliance,theunitrequiresa3”combustibleair
supplypipe.Theintakepipemustbesealedairtight.AirsupplypipecanbemadeofABS,
PVC,galvanizedsteel,corrugatedaluminum,corrugatedstainlesssteelorCategoryIII
stainlesssteel.
•Terminatingtheventingthroughasidewallisrecommendedforthedirect‐ventsystem.
•Runningtheexhaustventandtheintakepipeparallelisrecommended.
•Terminatingtheexhaustandintakeonthesamewall/surfaceisrecommended.
Terminatinginthesamepressurezoneallowsforpressurebalancing,whichprevents
nuisanceshutdowns.

11. ForT‐KJr2‐OS,T‐K4‐OS,&T‐D2‐OS:
•Tobeinstalledoutdoorsandonlyinareaswithmild,temperateclimates.

Installation
7│Page
•Installationandservicemustbeperformedbyaqualifiedinstaller(for
example,alicensedplumberorgasfitter),otherwisethewarrantywillbe
void.
•Theinstaller(licensedprofessional)isresponsibleforthecorrectinstallation
ofthewaterheaterandforcompliancewithallnational,state/provincial,
andlocalcodes.
•Themanufacturerdoesnotrecommendinstallingthewaterheaterinapitor
locationwheregasandwatercanaccumulate.
•Donothavetheventterminalpointingtowardanyoperatingwindow,door,or
openingintoabuilding.
•Donotinstallnexttoanysourceofairbornedebris,suchasaclothesdryer,
thatcancausedebristobetrappedinsidethecombustionchamber,unless
thesystemisdirect‐vented.
•Themanufacturerdoesnotrecommendinstallingthewaterheaterinan
atticduetosafetyissues.Ifyouinstallthewaterheaterinanattic:
•Makesuretheunitwillhaveenoughcombustionairandproperventilation.
•Keeptheareaaroundthewaterheaterclean.Whendustcollectsonthe
flamesensor,thewaterheaterwillshutdownonanerrorcode.
•Iftheaboveconditionscannotbemet,usethedirectventconversionkit
TK‐TV10.
•Placetheunitforeasyaccessforserviceandmaintenance.
•Adrainpan,orothermeansofprotectionagainstwaterdamage,is
re
q
uiredtobeinstalledunderthewaterheaterincaseofleaks.
•Thewarrantywillnotcoverdamagecausedbywaterquality.
•Onlypotablewaterorpotablewater/glycolmixturescanbeusedwiththis
waterheater.Donotintroducepoolorspawater,oranychemically
treatedwaterintothewaterheater.
•Waterhardnesslevelsmustnotexceed7grainspergallon(120ppm)for
singlefamilydomesticapplicationsormorethan4grainspergallon(70
ppm)forallothertypesofapplications.Waterhardnessleadstoscale
formationandmayaffect/damagethewaterheater.Hardwaterscaling
mustbeavoidedorcontrolledbyproperwatertreatment.
•WaterpHlevelsmustbebetween6.5and8.5
•Wellwatermustbetreated.
•Donotinstalltheunitwherewater,debris,orflammablevaporsmaygetinto
theflueterminal.
•Themanufacturerrecommendsusingthedirectventkitwhenthewater
heaterisinstalledinabeautysalon.Somechemicalsusedinabeautysalon
mayaffecttheflamesensor.Waterheatermaynotworkproperly.
•Althoughthewaterheaterisdesignedtooperatewithminimalsound,the
manufacturerdoesnotrecommendinstallingtheunitonawalladjacenttoa
bedroom,oraroomthatisintendedforquietstudyormeditation,etc.
•Locateyourheaterclosetoadrainwherewaterleakagewillnotdodamageto
surroundingareas.Aswithanywaterheatingappliance,thepotentialfor
leakageatsometimeinthelifeoftheproductdoesexist.Themanufacturer
willnotberesponsibleforanywaterdamagethatmayoccur.Ifyouinstalla
drainpanundertheunit,ensurethatitwillnotrestrictthecombustionair
flow.




CAUTION
WARNING

Installation
8│Page


CLEARANCES













ModelTopBottomFrontBackSides
T‐KJr2‐IN*12”12”24”1”2“
T‐KJr2‐OS36”12”24”1”2“

ModelTopBottomFrontBackSides
T‐K4‐IN*12”12”24”1”2“
T‐K4‐OS36”12”24”1”2“

ModelTopBottomFrontBackSides
T‐D2‐IN*12”12”24”1”2“
T‐D2‐OS36”12”24”1”2“
*Standardindoorinstallations&direct‐ventindoorinstallationshavethesameclearances.





INCLUDEDACCESSORIES

Checkthattheseitemsbelowareincludedwiththewaterheater.

1.InstallationManual&
Owner’sGuide

2. ProductRegistrationCard 3.CommunicationCable
(OnlyT‐D2‐IN&T‐D2‐OSmodels)










Qty:1Qty:1Qty:1
Bottom
Side
Top
Side
Front
Back
Maintainallclearancesaround
thewaterheater.

Installation
9│Page

OPTIONALITEMS
ModelT‐KJr2‐INT‐KJr2‐OST‐K4‐INT‐K4‐OST‐D2‐INT‐D2‐OS
TK‐RE02✔✔✔✔ 
TM‐RE30     ✔✔
TK‐BF01✔✔✔
TK‐TV10✔✔✔
TK‐PC01   ✔✔✔✔
TK‐PCJr2✔✔   
TK‐RB02  ✔✔✔
TK‐KPWL4
TK‐KPWH4✔✔✔
TK‐KPCT43✔✔✔
1.TemperatureRemoteController:TK‐RE02
TheTemperatureRemote
Controllerhastwofunctions.It
allowstheoutputtemperature
fromthewaterheatertobe
adjustedwithintherangeof
99°Fto167°F,anditalso
worksasadiagnostictoolthatwillgiveaconcise
errorcodewheneverthereisaproblemwiththe
unit.Thetemperatureoptionsare99°F,100°F,
102°F,104°F,106°F,108°F,109°F,111°F,113°F,
115°F,117°F,122°F,131°F,140°F,158°F,and
167°F.Seethetroubleshootingsectionfor
informationonpossibleerrorcodes.
2.TemperatureRemoteController:TM‐RE30 
TheTemperatureRemote
Controllerhastwofunctions.It
allowstheoutputtemperature
fromthewaterheatertobe
adjustedwithintherangeof99
°Fto185°F,anditalsoworksas
adiagnostictoolthatwillgiveaconciseerrorcode
wheneverthereisaproblemwiththeunit.The
temperatureoptionsare99°F,100°F,102°F,
104°F,106°F,108°F,110°F,111°F,113°F,115°F,
117°F,122°F,131°F,140°F,149°F,158°F,167°F,
176°Fand185°F.Seethetroubleshootingsection
forinformationonpossibleerrorcodes.
3.BackflowPreventer:TK‐BF01
TheBackflowpreventerprevents
thebackflowofairthroughthe
exhaustvent.Thishelpsprevent
harmfulexhaustgasesfrom
enteringthehome,aswellas
helpingtopreventtheunitfromfreezinginareas
wherecoldaircanbeblownordrawnintothe
exhaustsystem.Installthisventdamperin
accordancewiththeinstallationinstructionsand
anyapplicablecodes.

4.Direct‐VentConversionKit:TK‐TV10
Thiskitcanbeusedto
convertthewater
heaterfroma
standardventsystem
toadirect‐vent(or
sealedcombustion)
system.Installthis
conversionkitinaccordancewiththeinstallation
instructionsandanyapplicablecodes.

Installation
10│Page
5.PipeCovers:TK‐PC01andTK‐PCJr2
Thepipecoverprotectsthe
plumbingpipestothewaterheater
fromunexpectedadjustments.
Thispipecoverisfixedtothe
bottomofthewaterheater,which
hidestheplumbingandimproves
thevisualaspectsofthewhole
installationforthewaterheater.
6. Recessbox:TK‐RB02
TheRecessboxwillallowfor
“clean”installations.Thewater
heaterfitsinsidetherecessbox,
whichhidesandprotectsthe
wholewaterheaterandplumbing.
TheRecessboxwillfitin‐between
mostwallstuds.
7.T‐VentWallThimblewithTermination:TK‐KPWL4andTK‐KPWH4

Theseterminationsareusedwhenventingoutthroughthewall
andarecompatiblewiththeT‐Ventpipesystem.
Theseterminationsarespecialstainlesssteelventsforgas
appliancesandareULlistedasCategoryII,IIIandIV.Thereare
twotypesofterminations:theLouverterminationandtheHood
termination.Fordifferentwallthicknesses,therearetworanges
oflengthsavailable(refertotheT‐Ventbrochurefordetails).
Installtheseventterminationsinaccordancewiththeir
installationinstructionsandanyapplicablelocalcodes.

8.Direct‐VentConcentricTermination:TK‐KPCT43

Usedwhenterminatingdirect‐vent(sealed‐combustion)systems,
withdirect‐ventmodelsthatrequirea3”intakeanda4”exhaust.
Thisconcentricterminationprovidestheconvenienceofonly
havingtomakeonepenetrationthroughasidewallinsteadoftwo
separatepenetrationsfortheintakeandexhaustpiping.The
terminationincludesabirdscreen,restrictingsmallanimals,
pests,andforeignobjectsfromenteringintotheventsystem.
Thissidewallterminationisavailableinthreedifferentsizes,to
coverallrangesofwallthicknesses.
Direct‐ventConcentricTermination
Part#Coveringwallthickness
TK‐KPCT43‐13.9”–7.1”
TK‐KPCT43‐26.9”–10.1”
TK‐KPCT43‐39.8”–13.0”
Louver
Termination
TK‐KPWL4
Hood
Termination
TK‐KPWH4

Installation
11│Page
•DONOTadjustanydipswitchesontherightbankfortheT‐D2‐IN/OS
models.
•Thedarksquaresindicatethedirectionthedipswitchesshouldbesetto.
Dipswitches
HIGH‐ALTITUDEINSTALLATIONS

Checktheelevationwhereyourwaterheaterisinstalled.Setdipswitchesshowninthetablebelow
dependingonthealtitude.


Altitude0to2,000ft
(DEFAULT)2,000to4,000ft 4,000to6,000ft Over6,000ft
SwitchNo.3OFFONOFFConsult
ourTechnical
Services
Department
at1‐888‐
882‐5244
SwitchNo.4OFFOFFON

Altitude0to2,000ft
(DEFAULT)2,000to4,000ft 4,000to6,000ft Over6,000ft
SwitchNo.4OFFONOFFConsult
ourTechnical
Services
Department
at1‐888‐
882‐5244
SwitchNo.5OFFOFFON
T‐KJr2‐IN/OS&T‐K4‐IN/OS
T‐D2‐IN/OS(Leftbankofdipswitches)
T‐KJr2‐IN
/
OS&T‐K4‐IN
/
OSCom
p
uterboard
WARNING
T‐D2‐IN
/
OSCom
p
uterboard
Leftbankofdipswitches
OFF
ON12345678
OFF
ON12345678
OFF
ON12345678
OFF
ON123456
OFF
ON123456
OFF
ON123456

Installation
12│Page
Improperventingofthisappliancecanresultinexcessivelevelsofcarbon
monoxidewhichcanresultinseverepersonalinjuryordeath.

Improperinstallationcancausenauseaorasphyxiation,severeinjuryordeathfrom
carbonmonoxideandfluegasespoisoning.Improperinstallationwillvoidproduct
warranty.
Wheninstallingtheventsystem,allapplicablenationalandlocalcodesmustbe
followed.Ifyouinstallthimbles,firestopsorotherprotectivedevicesandthey
penetrateanycombustibleornoncombustibleconstruction,besuretofollowall
applicablenationalandlocalcodes.
VENTINGINSTRUCTIONS
‐General‐
Thewaterheatermustbeventedinaccordancewiththesection“VentingofEquipment"ofthelatest
editionoftheNationalFuelGasCode:ANSIZ223.1/NFPA54intheUnitedStatesand/orSection7ofthe
CAN/CSAB149.1NaturalGasandPropaneInstallationCodeinCanada,aswellasapplicablelocal
buildingcodes.
Themanufacturerrecommendsthe“T‐Vent”linemanufacturedbyTAKAGI(Referto“T‐Vent”
brochurefordetails).However,thefollowingarealsoULlistedmanufacturers:ProTechSystemsInc.
(FasNSeal),Flex‐LInc.,Z‐FlexInc.(Z‐VentIII),Metal‐FabInc.,andHeat‐FabInc.(Saf‐TVent).


Generalrulesforventingwaterheatersare:
•Placethewaterheaterascloseaspossibletotheventterminator.
•Theventcollarofthewaterheatermustbefasteneddirectlytoanunobstructedventpipe.
•Donotweldtheventpipetothewaterheater’sventcollar.
•Donotcuttheventcollaroftheunit.
•Theventmustbeeasilyremovablefromthetopofthewaterheaterfornormalserviceand
inspectionoftheunit.
•Thewaterheaterventmustnotbeconnectedtoanyothergasapplianceorventstack.
•Avoidusinganoversizedventpipeorusingextremelylongrunsofthepipe.
•Forrooftopventing,araincaporotherformofterminationthatpreventsrainwaterfrom
enteringintothewaterheatermustbeinstalled.
•Donotcommonventorconnectanyventfromotherappliancestothewaterheatervent.

Generalrulesforventterminations:
•Avoidlocatingthewaterheaterventterminatornearanyairintakedevices.Thesefanscan
pickuptheexhaustflueproductsfromthewaterheaterandreturnthemtothebuilding.
Thiscancreateahealthhazard.
•Locatetheventterminatorsothatitcannotbeblockedbyanydebris,atanytime.Most
codesrequirethattheterminatorbeatleast12inchesabovegrade,buttheinstallermay
determineifitshouldbehigherdependingonthejobsiteconditionandapplicablecodes.
•Apropersidewallterminatorisrecommendedwhenthewaterheaterisventedthrougha
sidewall.
•Regardingtheclearancesfromtheexhaustterminatortotheairinletoropening,referto
thenextfewpages.
CAUTION
DANGER

Installation
13│Page
‐Exhaustventing‐
(FortheT‐KJr2‐IN,T‐K4‐IN,&T‐D2‐INmodels)
ThisisaCategoryIIIapplianceandmustbeventedaccordingly.Theventsystemmustbesealedairtight.
AllseamsandjointswithoutgasketsmustbesealedwithhighheatresistantsiliconesealantorULlisted
aluminumadhesivetapehavingaminimumtemperatureratingof350°F.Forbestresults,aventsystem
shouldbeasshortandstraightaspossible.
•ThiswaterheaterisaCategoryIIIapplianceandmustbeventedaccordinglywithany4”vent
approvedforusewithCategoryIIIorSpecialBHtypegasvent.
•Followtheventpipemanufacturer’sinstructionswheninstallingtheventpipe.
•Donotcommonventthisappliancewithanyotherventedappliance(Donotterminatevent
intoachimney.Iftheventmustgothroughthechimney,theventmustrunalltheway
throughthechimneywithCategoryIIIapprovedorSpecialBHventpipe).
•Whenthehorizontalventrunexceeds5ft.,supporttheventrunat3ft.intervalswith
overheadhangars.
•Themaximumlengthofexhaustventpipingmustnotexceed50ft.(deducting5ft.foreach
elbowusedintheventingsystem).Donotusemorethan5elbows.

DiameterMax.No.ofElbowMax.Vertical&Horizontal(Total)VentLength
4”550ft.
*Foreachelbowadded,deduct5ft.frommax.Ventlength.
No.ofElbowsMax.VerticalorHorizontalLength
050ft.
145ft.
240ft.
525ft.
‐VentingIllustrations‐
(FortheT‐KJr2‐IN,T‐K4‐IN,&T‐D2‐INmodels)
HorizontalInstallationDiagram VerticalInstallationDiagram
SidewallVent
Terminator
Wall
BackflowPreventer*
VerticalCondensationDrain**
Fordetailsoftheoptionalitems,refertothe InstallationmanualforeachOptionalitem.
Roof
VerticalCondensation
Drain**
RoofFlashing
RainCap
BackflowPreventer*

Installation
14│Page

*BackflowPreventer(Recommendedforfreezingweatherconditions:36
°
Fandbelow)
**VerticalCondensationDrainmustbeinstalledaccordancewithlocalcodes.
HorizontalInstallationDiagram
WithDirect‐VentConcentric
Termination
HorizontalInstallationDiagram
(Withdirect‐venting)
VerticalInstallationDiagram
(Withdirect‐venting)
Thewaterheater
Intakeportof
Direct‐Vent
ConversionKit

InstallationDiagramofDirect‐Vent
ConversionKitwithwaterheater
Wall
Direct‐vent
Concentric
Termination
PlateofDirect‐VentConversionKit

Seethepicturebelowfordetailedconnection
instructionstotheDirect‐VentConversionKit.
VerticalCondensationDrain**

Backflow
Preventer*
Wall
Sidewall
Vent
Terminator
RoofFlashing
Vertical
Condensation
Drain**
Backflow
Preventer*
RainCap
Roof
Firestop

Installation
15│Page

‐Ventterminationclearances‐


Canada U.S.A
Directventand
otherthanDirect
Vent
DirectventOtherthanDirectVent
AClearanceabovegrade,veranda,porch,deck,
orbalcony.1foot1foot1foot
BClearancetowindowordoorthatmaybe
opened.3feet1foot
4feetfrombeloworside
opening.1footfrom
aboveopening.
CClearancetopermanentlyclosedwindow * * *
D
Verticalclearancetoventilatedsoffitlocated
abovetheventterminatorwithinahorizontal
distanceof2feet(61cm)fromthecenterline
oftheterminator.
***
EClearancetounventilatedsoffit* * *
FClearancetooutsidecorner* * *
GClearancetoinsidecorner* * *
HClearancetoeachsideofcenterlineextended
abovemeter/regulatorassembly3feet**
IClearancetoserviceregulatorventoutlet. 3feet * *
J
Clearancetonon‐mechanicalairsupplyinlet
tobuildingorthecombustionairinlettoany
otherapplication.
3feet1foot
4feetfrombeloworside
opening.1footfrom
aboveopening.
KClearancetomechanicalairsupplyinlet. 6feet 3feet 3feet
LClearanceabovepavedsidewalkorpaved
drivewaylocatedonpublicproperty.7feet*7feet
MClearanceunderveranda,porchdeck,or
balcony.1foot**
*ForclearancesnotspecifiedinANSIZ223.1/NFPA54orCAN/CSA‐B149.1,pleaseuseclearancesinaccordancewith
localinstallationcodesandtherequirementsofthegassupplier.

Installation
16│Page
Pleasefollowalllocalandnationalcodesinregardstoproperterminationclearances.
Intheabsenceofsuchcodes,thefollowingclearancescanbeusedasguidelines.Local
codessupersedetheseguidelines.



Forsidewallterminations

Exhausttermination
1ft.
1ft.2ft.
Inside
corner
Formultiplesidewallexhaust
terminations(e.g.multi‐unit
systems),anexhausttermination
mustbeatleast1ft.awayfrom
anotherexhausttermination.An
exhaustterminationmustalsobe
atleast2ft.awayfromaninside
corner(iftheadjacentwallisless
than2ft.oflength,theminimum
requireddistanceawayfromthe
insidecornerwillbeequaltothe
lengthofthatadjacentwall).
Fordirect‐ventsidewall
terminationsthatusetwo
separatepenetrationsforthe
intakeandexhaust,distance
theintakeandexhaust
terminationsatleast3ft.away
fromeachother,nomatterthe
orientation.
Formultiple‐unit,direct‐ventsidewall
terminationsthatcombinetheintake
andexhaustintoasinglepenetration,
spaceeachdirect‐ventterminationat
least1ft.awayfromeachother,no
mattertheorientation.Adirect‐vent
terminationmustalsobeatleast2ft.
awayfromaninsidecorner(ifthe
adjacentwallislessthan2ft.of
length,theminimumrequired
distanceawayfromtheinsidecorner
willbeequaltothelengthofthat
adjacentwall).
Formultiple‐unitrooftopterminations(whetherforstandardindooror
direct‐ventinstallations)spaceallexhaustandintaketerminationsin
accordancewithlocalcodes.Anexhaustterminationmustbespacedfrom
awallorsurfaceinaccordancewithlocalcodesaswell.Intheabsenceof
suchacode,anexhaustterminationmustbeahorizontaldistanceofat
least2ft.awayfromawallorsurface.
A:Inaccordancewithlocalcodes
Forrooftopterminations
Airintake
Exhaust termination
A
A
A
A
A
2ft.
Airintake
Exhaust
termination
Exhaustand/ordirect‐vent
sidewallterminationsshould
beatleast2ft.awayfroman
oppositesurface/wall.Do
notplacethetermination
directlyinfrontofan
openingintoabuilding.
2ft.
Exhaust
termination
Airsupplyinlet
3ft.
3ft.
3ft.
Directventtermination
1ft.
1ft.
Inside
corner
2ft.
CAUTION

Installation
17│Page
Sizethegaspipeappropriatelytosupplythenecessaryvolumeofgasrequiredfor
thewaterheaterusingANSI233.1/NFPA54intheUSAorCAN/CSAB149.1inCanada
orlocalcodes.Otherwise,flowcapabilitiesandoutputtemperatureswillbelimited.
•Checkthatthetypeofgasmatchestheratingplatefirst.
•Ensurethatanyandallgasregulatorsusedareoperatingproperlyand
providinggaspressureswithinthespecifiedrangeshownbelow.Excessgas
inletpressuremaycauseseriousaccidents.
•Conversionofthisunitfromnaturalgastopropaneorviseversawillvoidall
warranty.Contactyourlocaldistributortogetthecorrectunitforyourgas
type.Themanufacturerisnotliableforanypropertyand/orpersonal
damageresultingfromgasconversions.

GASSUPPLYANDGASPIPESIZING
‐General‐

•Theminimumandmaximuminletgaspressuresare:
GastypeInletgaspressure
NaturalGasMin.5.0”WC–Max.10.5”WC
PropaneMin.8.0”WC–Max.14.0”WC
•Gaspressureabovethisspecifiedrangeforthewaterheaterand/orinsufficientgasvolumewill
adverselyaffectperformance.Thesepressuresaremeasuredwhenthewaterheaterisinfull
operation.
•Inletgaspressuremustnotexceedtheabovemaximumvalues;gaspressureabovethespecified
rangewillcausedangerousoperatingconditionsanddamagetotheunit.
•Untiltestingofthemaingaslinesupplypressureiscompleted,ensurethegaslinetothewater
heaterisdisconnectedtoavoidanydamagetothewaterheater.



‐Gasconnections‐
1. Installamanualgasshut‐offvalvebetweenthewaterheaterandthegassupplyline.
2. Whenthegasconnectionsarecompleted,itisnecessarytoperformagasleaktest(seebelow)
eitherbyapplyingsoapywatertoallgasfittingsandobservingforbubblesorbyusingagasleak
detectiondevice.
•Thewaterheateranditsindividualshutoffvalvemustbedisconnectedfromthegassupply
pipingsystemduringanypressuretestingofthatsystemattestpressuresinexcessof1/2psi
(3.5kPa).
•Thewaterheatermustbeisolatedfromthegassupplypipingsystembyclosingitsindividual
manualshutoffvalveduringanypressuretestingofthegassupplypipingsystemattest
pressuresequaltoorlessthan1/2psi(3.5kPa).
3. Alwayspurgethegaslineofanydebrisand/orwaterbeforeconnectingtothegasinlet.






WARNING
NOTICE

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SpecificGravity
BasedonPressureDropof0.5”WC

BasedonEnergyContentof1,000BTU/CubicFt.:Thewaterheaterrequires140CubicFt./hrfortheT‐KJr2‐IN/OS,
190CubicFt./hrfortheT‐K4‐IN/OS,and199CubicFt./hrfortheT‐D2‐IN/OS.
Unit:CubicFeetperHour
PipeSizeLengthinFeet
Inches10’20’30’40’50’60’70’80’90’100’125’150’200’
¾”363249200171152138127118111104938472
1”684470377323286259239222208197174158135
1¼”1,404965775663588532490456428404358324278
1½”2,1031,4451,161993880798734683641605536486416
2”4,0502,7842,2351,913 1,696 1,536 1,413 1,315 1,2341,1651,033 936801
‐Propane(LP)SupplyPiping‐
MaximumCapacityofPropane(LP)Basedon11”WCsupplypressureata0.5”WCpressuredrop
Unit:kBTUperHour
PipeSize LengthinFeet
Inches 10’20’30’40’50’60’70’80’90’100’125’150’200’
¾”567393315267237217196185173162146132112
1”1,071732590504448409378346322307275252213
1¼”2,2051,4961,2121,039 913834771724677630567511440
1½”3,3072,2991,8581,559 1,417 1,275 1,181 1,086 1,023 976866787675
2”6,2214,3313,4652,992 2,646 2,394 2,205 2,047 1,921 1,8111,606 1,496 1,260
Formoreinformation,pleaseseethebelow.





BasedonEnergyContentof1,000BTU/CubicFt:

Divideeachappliance’sBTUrequirementby1,000BTUtoget
theappliancesCubicFt.requirement.

Takeintoaccountthedistancetheapplianceisfromthegas
meter,lookintheabovegascharttoproperlysizetheline.

Forsectionsofthegaslinesupplyinggastomorethanone
appliance(Ex:PointAtoPointB),addupthecubicft.
requirementsoftheappliancesthatarebeingsuppliedbythat
section,andsizetothefarthestappliance.

ForExample:ThesectionfromAtoBsuppliesgastothe
furnace,range,anddryer.AddinguptheBTUrequirements
anddividingby1,000yieldsacubicft.requirementof220
cubicft.ofgas.Thefarthestapplianceistherange,whichis50
ft.awayfromthemeter.Lookingattheabovechart,and
underthecolumnof50ft.,SectionAtoBneedstobe1”in
ordertosupply220cubicft.
10’Length
1”PipeSizeC
GasSizingExample
(NaturalGas)
10’Length
3/4”PipeSize
15’Length
1/2”PipeSize
10’Length
1/2”PipeSize
Furnace
120,000BTU
Water
Heater
199,000BTU
5’Length
1‐1/4”PipeSize
Range
65,000BTU
10’Length
3/4”PipeSize
Dryer
35,000BTU
15’Length
1”PipeSize
5’Length
1‐1/4”PipeSize
GasMeter
B
A

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outsideoftheunitclockwise3to
theoffposition.



‐Measuringinletgaspressure‐







Thewaterheatercannotperformproperlywithoutsufficientinletgaspressure.Belowareinstructions
onhowtochecktheinletgaspressure.THISISONLYTOBEDONEBYALICENSEDPROFESSIONAL.

1. Shutoffthemanualgasvalveonthesupplygasline.
2. Removethescrewforthepressureportlocatedon
thegasinletofthewaterheatershowninthe
diagramtotheright.
3. Connectthemanometertothepressureport.
4. Re‐openthemanualgasvalve.Checktoseethat
therearenogasleaks.Opensomeofthefixtures
thatusethehighestflowratetoturnonthewater
heater.
5. Checktheinletgaspressure.Whenthewaterheater
isonmaximumburn,themanometershouldread
from5.0”to10.5”WCforNaturalgas,from8.0”to
14.0”WCforPropane.





Pressureport

Installation
20│Page
•Donotusethiswaterheaterifanyparthasbeensubmersedunderwater.
Immediatelycallalicensedprofessionaltoinspectthewaterheatertoreplace
anydamagedparts.
•Donotreversethehotoutletandcoldinletconnectionstothewaterheater.
Thiswillnotproperlyactivatethewaterheater.
WATERCONNECTIONS
Allpipes,pipefittings,valvesandothercomponents,includingsolderingmaterials,mustbesuitablefor
potablewatersystems.
1. Amanualshutoffvalvemustbeinstalledonthecoldwaterinlettothewaterheaterbetween
themainwatersupplylineandthewaterheater.
2. Inaddition,amanualshutoffvalveisalso
recommendedonthehotwateroutletofthe
unit.Ifthewaterheaterisinstalledwithin,or
subjectedto,aclosedloopwatersystem,a
thermalexpansiontankmustbeinstalled.
3. Beforeinstallingthewaterheater,flushthe
waterlinetoremovealldebris,andafter
installationiscomplete,purgetheairfromthe
line.Failuretodosomaycausedamagetothe
heater.
4. Thereisawiremeshfilterwithinthecoldinlet
totrapdebrisfromenteringyourheater.This
willneedtobecleanedperiodicallytomaintain
optimumflow.
‐Pressurereliefvalve‐
Thewaterheaterhasahigh‐temperatureshutoffswitchbuiltinasastandardsafetyfeature(calleda
Hi‐Limitswitch)thereforea“pressureonly”reliefvalveisrequired.
•Thisunitdoesnotcomewithanapprovedpressurereliefvalve.
•Anapprovedpressurereliefvalvemustbeinstalledonthehotwateroutlet.
•ThepressurereliefvalvemustconformtoANSIZ21.22orCAN1‐4.4andinstallationmustfollow
localcode.
•Thedischargecapacitymustbeatleast140,000BTU/hfortheT‐KJr2‐IN/OS,190,000BTU/hfor
theT‐K4‐IN/OS,and199,000BTU/hfortheT‐D2‐IN/OS.
•Thepressurereliefvalveneedstoberatedforamaximumof150psi.
•Thedischargepipingforthepressurereliefvalvemustbedirectedsothatthehotwatercannot
splashonanyoneoronnearbyequipment.
•Attachthedischargetubetothepressurereliefvalveandruntheendofthetubetowithin6"
fromthefloor.Thisdischargetubemustallowfreeandcompletedrainagewithoutany
restrictions.
•Ifthepressurereliefvalveinstalledonthewaterheaterdischargesperiodically,thismaybedue
toadefectivethermalexpansiontankordefectivepressurereliefvalve.
•Thepressurereliefvalvemustbemanuallyoperatedperiodicallytocheckforcorrectoperation.
•Novalvemustbeplacedbetweenthereliefvalveandthewaterheater.
Pressure
ReliefValve
Hot
outle
t

Cold
inle
t

Gas
inle
t
AsCloseas
Possible
CAUTION