John Wood JW375T75N-AV User manual

1
Instruction Manual
PRINTED 0814 326007-001
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
COMMERCIAL GAS WATER HEATERS
• For Your Safety •
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
MODELS JW375T75N-AV
and JW375T75P-AV
Series 300, 301
INSTALLATION - OPERATION - SERVICE
- MAINTENANCE - LIMITED WARRANTY
CANADIAN MANUAL
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
This manual must remain with the
water heater.
599 Hill Street West Fergus,
ON Canada N1M 2X1
Low Lead Content
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury or death.
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 electrical 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.
•
•
•
•

2
SAFE INSTALLATION, USE AND SERVICE......................3
APPROVALS......................................................................3
GENERAL SAFETY INFORMATION..................................4
INTRODUCTION................................................................5
Abbreviations Used .....................................................5
 QualiedInstallerorServiceAgency........................... 5
Preparing for the New Installation ...............................5
INSTALLATION CONSIDERATIONS ............................. 6-9
Rough In Dimensions..................................................6
Thermometers.............................................................7
 FactstoConsiderAboutLocation ............................... 7
High Altitude ................................................................8
 Clearances ..................................................................8
Insulation Blankets ......................................................9
Hard Water ..................................................................9
 CirculationPumps .......................................................9
INSTALLATION REQUIREMENTS .................................. 10
 GasSupplySystems.................................................10
Gas Pressure Requirements.....................................10
 SupplyGasRegulator ...............................................10
Mixing Valves ............................................................10
Water Piping.............................................................. 11
 ClosedWaterSystems.............................................. 11
Thermal Expansion ................................................... 11
Temperature - Pressure Relief Valve......................... 11
Filling the Water Heater.............................................12
Air Requirements.......................................................12
 UnconnedSpace..................................................... 13
 ConnedSpace.........................................................13
 FreshAirOpeningsforConnedSpaces ..................13
Outdoor Air Through Two Openings.......................... 13
Outdoor Air Through One Opening ...........................13
 OutdoorAirThroughTwoHorizontalDucts...............14
 OutdoorAirThroughTwoVerticalDucts ................... 14
 AirFromOtherIndoorSpaces ..................................14
Venting ...................................................................... 14
Gas Piping.................................................................16
Sediment Traps .........................................................17
LIGHTING & OPERATING INSTRUCTIONS .............. 18,19
TEMPERATURE REGULATION ...................................... 20
FOR YOUR INFORMATION............................................. 20
Start Up Conditions ...................................................20
Operational Conditions..............................................21
PERIODIC MAINTENANCE............................................. 22
 VentingSystemInspection ........................................22
 BurnerInspection ......................................................22
Burner Cleaning ........................................................22
Housekeeping ...........................................................23
 AnodeRodInspection............................................... 23
Temperature-Pressure Relief Valve Test ...................23
 TankCleanoutProcedure..........................................24
 Service ......................................................................24
LEAKAGE CHECKPOINTS..............................................25
TROUBLESHOOTING GUIDELINES...............................26
WATER PIPING DIAGRAMS.......................................27-32
NOTES ........................................................................33-34
WARRANTY .....................................................................35
TABLE OF CONTENTS

3
SAFE INSTALLATION, USE AND SERVICE
Theproperinstallation,useandservicingofthiswaterheaterisextremelyimportanttoyoursafetyandthesafetyofothers.
Manysafety-relatedmessagesandinstructionshavebeenprovidedinthismanualandonyourownwaterheatertowarnyouand
othersofapotentialinjuryhazard.Readandobeyallsafetymessagesandinstructionsthroughoutthismanual.Itisveryimportant
thatthemeaningofeachsafetymessageisunderstoodbyyouandotherswhoinstall,use,orservicethiswaterheater.
Allsafetymessageswillgenerallytellyouaboutthetypeofhazard,whatcanhappenifyoudonotfollowthesafetymessage,and
howtoavoidtheriskofinjury.
TheCaliforniaSafeDrinkingWaterandToxicEnforcementActrequirestheGovernorofCaliforniatopublishalistofsubstances
known to the State of California to cause cancer, birth defects, or other reproductive harm, and requires businesses to warn of
potentialexposuretosuchsubstances.
ThisproductcontainsachemicalknowntotheStateofCaliforniatocausecancer,birthdefects,orotherreproductiveharm.This
waterheatercancauselowlevelexposuretosomeofthesubstanceslistedintheAct.
DANGER
WARNING
CAUTION
CAUTION
DANGER indicates an imminently
hazardous situation which, if not avoided,
will result in injury or death.
This is the safety alert symbol. It is used to alert you to
potential personal injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
WARNING indicates a potentially hazardous
situation which, if not avoided, could result
in injury or death.
CAUTION indicates a potentially hazardous
situation which, if not avoided, could result in
minor or moderate injury.
CAUTION used without the safety alert
symbol indicates a potentially hazardous
situation which, if not avoided, could result in
property damage.
APPROVALS
Low Lead Content

4
GENERAL SAFETY INFORMATION

5
ThankYouforpurchasingthiswaterheater.Properlyinstalledand
maintained,itshouldgiveyouyearsoftroublefreeservice.
ABBREVIATIONS USED
AbbreviationsFoundInThisInstructionManual:
• UL-UnderwritersLaboratoriesInc.
• ANSI-AmericanNationalStandardsInstitute
• NFPA-NationalFireProtectionAssociation
• ASME-AmericanSocietyofMechanicalEngineers
• AHRI - Air-Conditioning, Heating and Refrigeration Institute
• CAN - Canada
• EPACT-EnergyPolicyAct
• CSA-CanadianStandardsAssociation
This gas-fired water heater is design certified by Underwriters
LaboratoriesInc.underAmericanNationalStandard/CSAStandard
forGasWaterHeatersANSIZ21.10.3•CSA4.3(currentedition).
QUALIFIED INSTALLER OR SERVICE AGENCY
Installationandserviceofthiswaterheaterrequiresabilityequivalent
tothatofaQualiedAgency(asdenedbyANSIbelow)intheeld
involved. Installation skills such as plumbing, air supply, venting,
gassupplyandelectricalsupplyarerequiredinadditiontoelectrical
testingskillswhenperformingservice.
ANSIZ223.12006Sec.3.3.83:“QualiedAgency”-“Anyindividual,
rm, corporation or company that either in person or through a
representativeisengagedinandisresponsiblefor(a)theinstallation,
testingorreplacementofgaspipingor(b)theconnection,installation,
testing, repair or servicing of appliances and equipment; that is
experiencedinsuchwork;thatisfamiliarwithallprecautionsrequired;
and that has complied with all the requirements of the authority
havingjurisdiction.”
If you are not qualied (as dened byANSI above) and licensed or
certied as required by the authority having jurisdiction to perform a
giventaskdonotattempttoperformanyoftheproceduresdescribed
inthismanual.Ifyoudonotunderstandtheinstructionsgiveninthis
manualdonotattempttoperformanyproceduresoutlinedinthismanual.
PREPARING FOR THE INSTALLATION
1. Read the “General Safety” section, page4of this manual
firstandthentheentiremanualcarefully.Ifyoudon’tfollow
thesafetyrules,thewaterheaterwillnotoperateproperly.
ItcouldcauseDEATH,SERIOUSBODILYINJURYAND/OR
PROPERTY DAMAGE.
 This manual contains instructions for the installation,
operation,andmaintenanceofthegas-f iredwaterheater.It
alsocontainswarningsthroughoutthemanualthatyoumust
readandbeawareof.Allwarningsandallinstructionsare
essentialtotheproperoperationofthewaterheaterandyour
safety.Sincewecannotputeverythingonthefirstfewpages,
READ THE ENTIRE MANUAL BEFORE ATTEMPTING TO
INSTALL OR OPERATE THE WATER HEATER.
2.The installation must conform with these instructions and
thelocalcodeauthorityhavingjurisdiction.Intheabsence
oflocalcodes,theinstallationmustcomplywiththecurrent
editions of the National Fuel Gas Code, ANSI Z223.1/
NFPA54orCAN/CSA-B149.1theNaturalGasandPropane
Installation Code. All documents are available from the
CanadianStandardsAssociation,8501EastPleasantValley
Road, Cleveland, OH 44131. NFPA documents are also
available from the National Fire Protection Association, 1
BatterymarchPark,Quincy,MA02269.
3.Ifafterreading thismanualyouhaveanyquestionsordo
notunderstandanyportionoftheinstructions,callthelocal
gasutilityorthemanufacturerwhosenameappearsonthe
rating plate.
4.Carefully plan the place where you are going to put the
water heater.  Correct  combustion, vent action, and vent
pipeinstallationareveryimportantinpreventingdeathfrom
possiblecarbonmonoxidepoisoningandfires,seeFigures
3 and 7.
 Examinethelocationtoensurethewaterheatercomplieswith
the“LocatingtheNewWaterHeater”sectioninthismanual.
5.ForCaliforniainstallationthiswaterheatermustbebraced,
anchored, or strapped to avoid falling or moving during
an earthquake.  See instructions for correct installation
procedures.InstructionsmaybeobtainedfromCalifornia
Office of the State Architect, 400 P Street, Sacramento,
CA 95814.
6.MassachusettsCoderequiresthiswaterheatertobeinstalled
in accordance with Massachusetts 248-CMR 2.00: State
Plumbing Code and 248-CMR 5.00.
INTRODUCTION

6
ROUGH IN DIMENSIONS
TABLE 1. DIMENSIONS AND RECOVERY RATINGS
DIMENSIONS
Models Units A B C D E F G H J K L M
JW375T75N-AV
JW375T75P-AV
Inches
CM
611/8
155.25
581/2
148.6
2911/16
75.4
261/2
67.3
153/16
38.6
4
10.2
141/2
39.4
16
40.6
11/4
3.2
1
NPT
1/2
NPT
1115/16
30.3
RECOVERY RATINGS
Models
Input Approx.
Gal.
Cap.
Approx.
Liter
Cap.
Temp.
Rise
C° 17 22 28 33 39 44 50 56 61 67 72 78
Rating
Btu/Hr
Rating
kW F° 30 40 50 60 70 80 90 100 110 120 130 140
JW375T75N-AV
JW375T75P-AV 75,100 22 74 280 GPH 243 182 146 121 104 91 81 73 66 61 56 52
LPH 916 686 550 456 392 343 305 275 249 230 211 196
Recoveryratingsbasedon80%thermalefciency.
INSTALLATION CONSIDERATIONS
FIGURE 1.

7
THERMOMETERS (Not Supplied)
Thermometersshouldbeobtainedandeldinstalled.
Thermometersareinstalledinthesystemasameansofdetecting
thetemperatureoftheoutletwatersupply.
ThisWaterHeaterhasbeendesigncertifiedascomplyingwith
ANSIZ21.10.3-CSA4.3currenteditionforwaterheatersandis
consideredsuitablefor:
Water (Potable) Heating and Space Heating:All models are
consideredsuitableforwater(potable)heatingandspaceheating.
HOTTERWATERCANSCALD:
Waterheatersareintendedtoproducehotwater.Waterheatedtoa
temperaturewhichwillsatisfyspaceheating,clotheswashing,dish
washing,andothersanitizingneedscanscaldandpermanentlyinjure
youuponcontact.Somepeoplearemorelikelytobepermanently
injuredbyhotwaterthanothers.Theseincludetheelderly,children,
theinrm,orphysically/mentallyhandicapped.Ifanyoneusinghot
waterinyourhometsintooneofthesegroupsorifthereisalocal
coderequiringacertaintemperaturewateratthehotwatertap,then
youmusttakespecialprecautions.Inadditiontousingthelowest
possible temperature setting that satises your hot water needs,
ameanssuchasa*MixingValveshouldbeusedatthehotwater
tapsusedbythesepeopleoratthewaterheater.Mixingvalvesare
availableatplumbingsupplyorhardwarestores.Consultaqualied
installer or service agency. Follow mixing valve manufacturer’s
instructions for installation of valves. Before changing the factory
settingonthethermostat,readthe“TemperatureRegulation”section
in this manual, see Figures 17 and 18.
FACTS TO CONSIDER ABOUT THE LOCATION
Carefully choose an indoor location for the new water heater,
because the placement is a very important consideration for
the safety of the occupants in the building and for the most
economical use of the water heater. This water heater is not
foruseinmanufactured(mobile)homesoroutdoorinstallation.
Whetherreplacinganoldwaterheaterorputtingthewaterheater
inanewlocation,thefollowingcriticalpointsmustbeobserved:
1.Selectalocationindoorsascloseaspracticaltothegasventor
chimneytowhichthewaterheaterventisgoingtobeconnected,
andascentralizedwiththewaterpipingsystemaspossible.
2.Selected location must provide adequate clearances for
servicingandproperoperationofthewaterheater.
Installationofwaterheatermustbeaccomplishedinsuchamannerthat
ifthetankoranyconnectionsshouldleak,owwillnotcausedamageto
thestructure.Forthisreason,itisnotadvisabletoinstallwaterheater
inanatticorupperoor.Whensuchlocationscannotbeavoided,a
suitable metal drain pan should be installed under the water heater.
MetalDrainpansareavailableatyourlocalhardwarestore.Sucha
metal drain pan must have a minimum length and width of at least
2”(51mm)greaterthanwaterheaterdimensionsandmustbepiped
toanadequatedrain.Thepanmustnotrestrictcombustionairow.
Waterheaterlifedependsuponwaterquality,waterpressureandthe
environmentinwhichthewaterheaterisinstalled.Waterheatersare
sometimesinstalledinlocationswhereleakagemayresultinproperty
damage, even with the use of a drain pan piped to a drain. However,
unanticipateddamagecanbereducedorpreventedbyaleakdetector
orwatershut-offdeviceusedinconjunctionwithapipeddrainpan.
Thesedevicesareavailablefromsomeplumbingsupplywholesalers
andretailers,anddetectandreacttoleakageinvariousways:
• Sensors mounted in the drain pan that trigger an alarm or turn off
theincomingwatertothewaterheaterwhenleakageisdetected.
• Sensorsmountedinthedrainpanthatturnoffthewatersupply
totheentirehomewhenwaterisdetectedinthedrainpan.
• Watersupplyshut-offdevicesthatactivatebasedonthewater
pressuredifferentialbetweenthecoldwaterandhotwaterpipes
connectedtothewaterheater.
• Devicesthatwillturnoffthegassupplytoagaswaterheater
whileatthesametimeshuttingoffitswatersupply.
INSTALLATIONS IN AREAS WHERE FLAMMABLE LIQUIDS
(VAPORS)ARELIKELYTOBEPRESENTORSTORED(GARAGES,
STORAGEANDUTILITYAREAS,ETC.):Flammableliquids(suchas
gasoline,solvents,propane[LPorbutane,etc.]andothersubstances
suchasadhesives,etc.)emitammablevaporswhichcanbeignitedby
agaswaterheater’spilotlightormainburner.Theresultingashback
andrecancausedeathorseriousburnstoanyoneinthearea,aswell
aspropertydamage.Ifinstallationinsuchareasisyouronlyoption,then
installationmustbeaccomplishedinawaythatthepilotameandmain
burnerameareelevatedfromooratleast18inches.Whilethismay
reducechancesofammablevapors,fromaoorspillbeingignited,
gasolineandotherammablesubstancesshouldneverbestoredor

8
usedinthesameroomorareacontainingagaswaterheaterorother
openameorsparkproducingappliance.NOTE:Flammablevaporsmay
bedrawnbyaircurrentsfromotherareasofthestructuretotheappliance.
Also,thewater heatermustbe located and/orprotected so itisnot
subjecttophysicaldamagebyamovingvehicle.
Thiswaterheatermustnotbeinstalleddirectlyoncarpeting.Carpeting
mustbeprotectedbymetalorwoodpanelbeneaththewaterheater
extendingbeyondthefullwidthanddepthofthewaterheaterbyatleast
3”(76.2mm)inanydirection,orifthewaterheaterisinstalledinan
alcoveorcloset,theentireoormustbecoveredbythepanel.Failure
toheedthiswarningmayresultinarehazard.
HIGH ALTITUDE
Waterheaterscoveredinthismanualhavebeentestedandapproved
forinstallation atelevations upto 7,700feet (2,347m) abovesea
level.Forinstallationabove7,700feet(2,347m),thewaterheater’s
Btuinputshouldbereducedattherateof4percentforeach1,000
feet(305m)abovesealevelwhichrequiresreplacementoftheburner
oriceinaccordancewiththeNationalFuelGasCodeANSIZ223.1/
NFPA54or the NaturalGasandPropane Installation CodeCAN/
CSAB149.1.Contactyourlocalgassupplierforfurtherinformation.
Failuretoreplacethestandardoricewiththeproperhighaltitude
orice when installed at elevations above 7,700 feet (2,347 m)
couldresultinimproperandinefcientoperationofthewaterheater,
producingcarbonmonoxidegasinexcessofthesafelimits.This
couldresultinseriousinjuryordeath.Contactyourlocalgassupplier
foranyspecicchangesthatmayberequiredinyourarea.
CLEARANCES
Minimum clearances between the water heater and combustible
constructionare0inchatthesidesandrear,4”(102mm)atthe
front,and6”(153mm)fromtheventpipe.Clearancefromthetop
ofthejacketis12”(305mm)onmostmodels.
FIGURE 2.
A gas water heater cannot operate properly without the correct
amountofairforcombustion.Donotinstallinaconnedareasuch
asacloset,unlessyouprovideairasshowninthe“LocatingThe
NewWaterHeater”section.Neverobstructtheowofventilation
air.Ifyouhaveanydoubtsorquestionsatall,callyourgassupplier.
Failuretoprovidetheproperamountofcombustionaircanresult
in a re or explosion and cause death, serious bodily injury, or
propertydamage.
FIGURE 3.
Ifthiswaterheaterwillbeusedinbeautyshops,barbershops,
cleaning establishments, or self-service laundries with dry
cleaning equipment, it is imperative that the water heater or
water heaters be installed so that combustion and ventilation
air be taken from outside these areas.
Propellantsofaerosolspraysandvolatilecompounds,(cleaners,
chlorinebasedchemicals,refrigerants,etc.)inadditiontobeing
highlyammableinmanycases,willalsochangetocorrosive
hydrochloricacidwhenexposedtothecombustionproductsof
thewaterheater.Theresultscanbehazardous,andalsocause
productfailure.

9
INSULATION BLANKETS
Do not obstruct water heater air intake
with insulating blanket.
Gas and carbon monoxide detectors
are available.
Install water heater in accordance with
the instruction manual.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
Breathing Hazard - Carbon Monoxide Gas
Insulation blankets are available to the general public for
external use on gas water heaters but are not necessary
with these products. The purpose of an insulation blanket is
to reduce the standby heat loss encountered with storage
tankheaters.Thewaterheaterscoveredbythismanualmeet
or exceed the Energy Policy Act standards with respect to
insulation and standby heat loss requirements, making an
insulationblanketunnecessary.
Should you choose to apply an insulation blanket to this
heater,youshouldfollowtheseinstructions.SeetheFeatures
and Components section of this manual for identification
of components mentioned below. Failure to follow these
instructions can restrict the air flow required for proper
combustion,potentiallyresultinginfire, asphyxiation, serious
personalinjuryordeath.
• DO NOTapplyinsulationtothetopofthewaterheater,as
this will interfere with safe operation of the draft hood.
• DO NOTcoverthethermostatortheTemperature-
Pressure Relief Valve.
• DO NOTallowtheinsulationtocomewithin2inches(5
cm)ofthefloortopreventblockageofcombustionairflow
to the burner.
• DO NOTcovertheinstructionmanual.Keepitontheside
ofthewaterheaterornearbyforfuturereference.
• DOobtainnewwarningandinstructionlabelsfromthe
manufacturerforplacementontheblanketdirectlyover
the existing labels.
• DOinspecttheinsulationblanketfrequentlytomake
certainitdoesnotsag,therebyobstructingthe
combustionairflow.
HARD WATER
Wherehardwaterconditionsexist,watersofteningorthethreshold
type of water treatment is recommended. This will protect the
dishwashers,coffeeurns,waterheaters,waterpipingandother
equipment. See the Maintenance Section in this manual for
sedimentandlimescaleremovalprocedures.
CIRCULATION PUMPS
Acirculatingpumpisusedwhenasystemrequiresacirculating
loop or there is a storage tank used in conjunction with the
water heater. See Water Piping Diagrams in this manual for
installationlocationofcirculatingpumps.
SeetheCirculationPumpWiringDiagramsbelowforelectrical
hookup information. Install in accordance with the current
edition of the National Electrical Code, NFPA 70 or the
CanadianElectricalCode,CSAC22.1.
Allbronzeorstainlesssteelcirculatingpumpsarerecommended
forusedwithcommercialwaterheaters.
Somecirculatingpumpsaremanufacturedwithsealedbearings
anddonotrequirefurtherlubrication.Somecirculatingpumps
must beperiodicallyoiled.Refer to the pumpmanufacturer’s
instructionsforlubricationrequirements.
CIRCULATING PUMP WIRING DIAGRAM
STORAGE TANK OR BUILDING RECIRCULATION
FIELD SUPPLIED TEMPERATURE CONTROL
INSTALLED IN THE STORAGE TANK
OR CIRCULATING LOOP RETURN LINE
CIRC
PUMP
MOTOR
L1 HOT
L2 NEUTRAL
120 VAC
POWER
NOTE: USE SEPARATE 120 VAC POWER
SUPPLY FOR PUMP CIRCUIT. DO NOT
SHARE POWER WITH APPLIANCE AS THIS
MAY CAUSE ELECTRICAL LINE NOISE AND
LEAD TO ERRATIC CONTROL SYSTEM
OPERATION.
FIGURE 4.
CIRCULATING PUMP WIRING DIAGRAM
DISHWASHER LOOP WITH TOGGLE SWITCH
FIELD SUPPLIED TEMPERATURE
CONTROL INSTALLED IN THE
CIRCULATING LOOP RETURN LINE
DISHWASHER
TOGGLE
SWITCH
CIRC
PUMP
MOTOR
L1 HOT
L2 NEUTRAL
120 VAC
POWER
NOTE: USE SEPARATE 120 VAC POWER
SUPPLY FOR PUMP CIRCUIT. DO NOT
SHARE POWER WITH APPLIANCE AS THIS
MAY CAUSE ELECTRICAL LINE NOISE AND
LEAD TO ERRATIC CONTROL SYSTEM
OPERATION.
FIGURE 5.

10
GAS SUPPLY SYSTEMS
Low pressure building gas supply systems are dened as those
systemsthatcannotunderanycircumstancesexceed14”W.C.
(1/2PSIGauge).Thesesystemsdonotrequirepressureregulation.
Measurements should be taken to insure that gas pressures are stable
and fall within the requirements stated on the water heater rating plate.
readingsshould betaken with all gas burningequipment off(static
pressure)andwithallgasburningequipmentrunningatmaximumrate
(dynamicpressure).Thegassupplypressuremustbestablewithin1.5”
W.C.fromstatictodynamicpressuretoprovidegoodperformance.
Pressuredropsthatexceed1.5”W.C.maycauseroughstarting,noisy
combustionornuisanceoutages.Increasesorspikesinstaticpressure
duringoffcyclesmaycausefailuretoigniteorinseverecasesdamage
toappliancegasvalves.Ifyourlowpressuresystemdoesnotmeet
theserequirements,theinstallerisresponsibleforthecorrections.
HighPressurebuildingsupplysystemsusepressuresthatexceed
14” W.C. (1/2 PSI Gauge). These systems must use eld supplied
regulatorstolowerthegaspressuretolessthan14”W.C.(1/2PSI
Gauge).Appliancesrequiregasregulatorsthatareproperlysizedforthe
waterheaterinputanddelivertheratingplatespeciedpressures.Gas
supplysystemswherepressureexceeds5PSIoftenrequiremultiple
regulatorstoachievedesiredpressures.Systemsinexcessof5PSI
buildingpressureshouldbedesignedbygasdeliveryprofessionals
forbestperformance.Waterheatersconnectedtogassupplysystems
thatexceed14”W.C.(1/2PSIGauge)atanytimemustbeequipped
withagassupplyregulator.
GAS PRESSURE REQUIREMENTS
Naturalgasmodelsrequireaminimumgassupplypressureof4.5”
W.C.(1.12kPa).Propanegasmodelsrequireaminimumgassupply
pressure of 11” W.C. (2.74 kPa). The minimum supply pressure
is measured while gas is owing (dynamic pressure). The supply
pressure(dynamic)shouldneverfallbelowthespeciedminimum
supplypressure.Thesupplypressureshouldbemeasuredwithallgas
redappliancesconnectedtothecommonmainringatfullcapacity.If
thesupplypressuredropsmorethan1.5”W.C.(0.37kPa)asgasbegins
toowtothewaterheaterthenthesupplygassystemincludingthe
gaslineand/orthegasregulatormayberestrictedorundersized.See
SupplyGasregulatorsectionandGasPipingsectionofthismanual.
Thegasvalveonallmodelshasamaximumgassupplypressurelimit
of14”W.C.(3.48kPa)Themaximumsupplypressureismeasured
whilegasisnotowing(staticpressure).
SUPPLY GAS REGULATOR
Themaximumallowablegassupplypressureforthiswaterheater
is14.0inchesW.C.(3.48kPa).Installapositivelock-upgaspressure
regulatorinthegassupplylineifinletgaspressurecanexceed14.0
inchesW.C.(3.48kPa) atanytime. regulatorsmustbe sized/used
accordingtomanufacturer’sspecications.
Ifapositivelock-upregulatorisrequiredfollowtheseinstructions:
1. Positivelock-upgaspressureregulatorsmustberatedatorabove
 theinputBtu/hrratingofthewaterheatertheysupply.
2. Positivelock-upgaspressureregulator(s)shouldbeinstalledno
 closerthan3feet(1meter)andnofartherthan8feet(2.4meters)
 ofequivalentlengthfromthewaterheater’sinletgasconnection.
3. Afterinstallingthepositivelock-upgaspressureregulator(s)aninitial
 nominalsupplypressuresettingof7.0”W.C.whilethewaterheater
 isoperatingisrecommendedandwillgenerallyprovidegood
 waterheateroperation.Someadditionadjustmentmayberequired
 latertomaintainasteadygassupplypressure.
4. When installing multiple water heaters in the same gas supply
 system it is recommended that individual positive lock-up gas
 pressureregulatorsbeinstalledateachunit.
MIXING VALVES
Water temperature over 125°F (52°C)
can cause severe burns instantly
resulting 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 as
mixing valves must be installed when
required by codes and to ensure safe
temperatures at fixtures.
Waterheatedtoatemperaturewhichwillsatisfyclotheswashing,dish
washing,andothersanitizingneedscanscaldandcausepermanent
injuryuponcontact.Shortrepeatedheatingcyclescausedbysmall
hotwaterusescancausetemperaturesatthepointofusetoexceed
thewaterheater’stemperaturesettingbyupto20°F(11°C).
Somepeoplearemorelikelytobepermanentlyinjuredbyhotwater
than others. These include the elderly, children, the inrm and the
physically/mentally disabled. Table 2 shows the approximate time-
to-burnrelationshipfornormaladultskin.Ifanyoneusinghotwater
providedbythewaterheaterbeinginstalledtsintooneofthesegroups
orifthereisalocalcoderequiringacertainwatertemperatureatthe
pointofuse,thenspecialprecautionsmustbetaken.
In addition to using the lowest possible temperature setting that
satisesdemandoftheapplicationaMixingValveshouldbeinstalled
atthewaterheaterorathotwatertapstofurtherreducesystemwater
temperature. See Figure 6.
Mixing valves are available at plumbing supply stores. Consult
a Qualified Installer or ServiceAgency. Follow mixing valve
manufacturer’sinstructionsforinstallationofthevalves.
TABLE 2.
Water
Temperature °F
Time for
1st Degree Burn
(LessSevereBurns)
Time for Permanent Burns
2nd & 3rd Degree
(MostSevereBurns)
110
(normalshowertemp.)
116 (painthreshold)
116 35 minutes 45 minutes
122 1 minute 5 minutes
131 5seconds 25seconds
140 2seconds 5seconds
149 1second 2seconds
154 instantaneous 1second
(U.S.GovernmentMemorandum,C.P.S.C.,PeterL.Armstrong,Sept.15,1978)
HOT WATER
OUTLET
TO TANK
INLET
CHECK
VALVE
MIXING
VALVE
COLD
WATER
INLET
TEMPERED WATER
OUTLET
12” TO 15”
(30-38 cm)
CHECK
VALVE
FIGURE 6.
INSTALLATION REQUIREMENTS

11
WATER PIPING
WATER (POTABLE) HEATING AND SPACE HEATING
Thiswaterheatershallnotbeconnectedtoanyheatingsystems
orcomponent(s)usedwithanon-potablewaterheatingappliance.
Allpipingcomponentsconnectedtothisunitforspaceheating
applicationsshallbesuitableforusewithpotablewater.
Toxicchemicals,suchasthoseusedforboilertreatmentshallnot
beintroducedintothissystem.
Whenthesystemrequireswaterforspaceheatingattemperatures
higherthanrequiredfordomesticwaterpurposes,amixingvalve
must be installed. Please refer to Figure 2 for suggested piping
arrangement.
Thesewaterheaterscannotbeusedinspaceheatingapplications
only.
CLOSED WATER SYSTEMS
Water supply systems may, because of code requirements or
such conditions as high line pressure, among others, have
installed devices such as pressure reducing valves, check
valves,andbackflowpreventers.Devicessuchasthesecause
thewatersystemtobeaclosedsystem.
THERMAL EXPANSION
Aswaterisheated,itexpands(thermalexpansion).Inaclosed
systemthevolumeofwaterwillgrowwhenitisheated.Asthe
volumeofwatergrowstherewillbeacorrespondingincreasein
water pressure due to thermal expansion. Thermal expansion
cancauseprematuretankfailure(leakage).Thistypeoffailure
is not covered under the limited warranty. Thermal expansion
canalsocauseintermittentTemperature-PressureReliefValve
operation: water discharged from the valve due to excessive
pressurebuildup.Thisconditionisnotcoveredunderthelimited
warranty.TheTemperature-PressureReliefValveisnotintended
fortheconstantreliefofthermalexpansion.
A properly sized thermal expansion tank must be installed on
all closed systems to control the harmful effects of thermal
expansion.Contactalocalplumbingservicetechniciantohave
a thermal expansion tank installed.
FIGURE 7.
NOTE: To protect against untimely corrosion of hot and cold
waterttings,itisstronglyrecommendedthatdi-electricunions
orcouplingsbeinstalledonthiswaterheaterwhenconnectedto
copperpipe.
Figure7showsthetypicalattachmentofthewaterpipingtothe
waterheater.Thewaterheaterisequippedwith1”NPTthreaded
nipple (75 gallon models) or 1.25” NPT threaded nipple (100
gallonmodels)waterconnections.
TEMPERATURE-PRESSURE RELIEF VALVE
Explosion Hazard
Temperature-Pressure Relief Valve
must comply with ANSI Z21.22-
CSA 4.4 and ASME code.
Properly sized temperature-
pressure relief valve must be
installed in opening provided.
Can result in overheating and
excessive tank pressure.
Can cause serious injury or death.
This water heater is provided with a properly rated/sized and
certied combination Temperature-Pressure Relief Valve (T&P
valve)bythemanufacturer.Thevalveiscertiedbyanationally
recognizedtestinglaboratorythatmaintainsperiodicinspection
of production of listed equipment of materials as meeting the
requirements for Relief Valves for Hot Water Supply Systems,
ANSIZ21.22•CSA4.4,andthecoderequirementsofASME.
Ifreplaced, the newT&Pvalvemust meet therequirements of
localcodes,butnotlessthanacombinationTemperature-Pressure
ReliefValverated/sizedand certied asindicatedintheabove
paragraph. The new valve must be marked with a maximum set
pressurenottoexceedthemarkedhydrostaticworkingpressure
ofthewaterheater(150psi=1,035kPa)andadischargecapacity
notlessthanthewaterheaterBtu/hrorkWinputrateasshown
onthewaterheater’smodelratinglabel.

12
NOTE: In addition tothe factoryinstalledTemperature-Pressure
ReliefValve onthe water heater, eachremote storagetankthat
maybeinstalledandpipedtoawaterheatingappliancemustalso
have its own properly sized, rated and approved Temperature-
PressureReliefValveinstalled.Callthetollfreetechnicalsupport
phonenumberlistedonthebackcoverofthismanualfortechnical
assistanceinsizingaTemperature-PressureReliefValveforremote
storage tanks.
For safe operation of the water heater, the Temperature-Pressure
Relief Valve must not be removed from its designated opening nor
plugged. The Temperature-Pressure Relief Valve must be installed
directlyintothettingofthewaterheaterdesignedforthereliefvalve.
Installdischargepipingsothatanydischargewillexitthepipewithin
6inches(15.2cm)aboveanadequateoordrain,orexternaltothe
building.Incoldclimatesitisrecommendedthatitbeterminatedat
anadequatedraininsidethebuilding.Becertainthatnocontactis
madewithanyliveelectricalpart.Thedischargeopeningmustnot
beblockedorreducedinsizeunderanycircumstances.Excessive
length,over30feet(9.14m),oruseofmorethanfourelbowscan
causerestrictionandreducethedischargecapacityofthevalve.
No valve or other obstruction is to be placed between the
Temperature-PressureReliefValveandthetank.Donotconnect
dischargepipingdirectlytothedrainunlessa6”(15.2cm)airgapis
provided.Topreventbodilyinjury,hazardtolife,orpropertydamage,
therelief valvemust beallowed todischarge water in adequate
quantitiesshouldcircumstancesdemand.Ifthedischargepipeis
notconnectedtoadrainorothersuitablemeans,thewaterow
maycausepropertydamage.
Water Damage Hazard
• Temperature-Pressure Relief Valve discharge
pipe must terminate at adequate drain.
CAUTION
T&P Valve Discharge Pipe Requirements:
• Shall not be smaller in size than the outlet pipe size of the valve,
orhaveanyreducingcouplingsorotherrestrictions.
• Shallnotbepluggedorblocked.
• Shall not be exposed to freezing temperatures.
• Shall be of material listed for hot water distribution.
• Shallbeinstalledsoastoallowcompletedrainageofboththe
Temperature-PressureReliefValveandthedischargepipe.
• Mustterminateamaximumofsixinchesaboveaoordrain
orexternaltobuilding.Incoldclimates,itisrecommended
thatdischargepipebeterminatedatanadequatedraininside
building.
• Shallnothaveanyvalveorotherobstructionbetweenthe
relief valve and the drain.
Burn hazard.
Hot water discharge.
Keep clear of Temperature-
Pressure Relief Valve
discharge outlet.
TheTemperature-PressureReliefValvemustbemanuallyoperated
atleasttwiceayear.Cautionshouldbetakentoensurethat(1)no
one is in front of or around the outlet of the Temperature-Pressure
ReliefValvedischargeline,and(2)thewatermanuallydischarged
will not cause any bodily injury or property damage because
thewatermay beextremelyhot.If aftermanuallyoperating the
valve,itfailstocompletelyresetandcontinuestoreleasewater,
immediatelyclosethecoldwaterinlettothewaterheater,followthe
draininginstructionsinthismanual,andreplacetheTemperature-
PressureReliefValvewithaproperlyrated/sizednewone.
NOTE:The purpose of a Temperature-Pressure Relief Valve is to
preventexcessivetemperaturesandpressuresinthestoragetank.
The T&P valve is not intended for the constant relief of thermal
expansion.Aproperlysizedthermalexpansiontankmustbeinstalled
on all closed systems to control thermal expansion, see Closed
WaterSystemsandThermalExpansiononpage11.
If you do not understand these instructions or have any questions
regardingtheTemperature-PressureReliefValvecallthetollfreenumber
listedonthebackcoverofthismanualfortechnicalassistance.
FILLING THE WATER HEATER
Neverusethiswaterheaterunlessitiscompletelyfullofwater.To
preventdamagetothetank,thetankmustbelledwithwater.Water
mustowfromthehotwaterfaucetbeforeturning “ON” gastothe
water heater.
Tollthewaterheaterwithwater:
1.Close the water heater drain valve by turning the handle to the
right(clockwise).Thedrainvalveisonthelowerfrontofthewater
heater.
2. Open the cold water supply valve to the water heater.
NOTE:Thecoldwatersupplyvalvemustbeleftopenwhenthe
water heater is in use.
3.Toinsurecompletellingofthetank,allowairtoexitbyopeningthe
nearesthotwaterfaucet.Allowwatertorununtilaconstantowis
obtained. This will let air out of the water heater and the piping.
4. Checkallwaterpiping andconnectionsforleaks.Repairas
needed.
AIR REQUIREMENTS
Breathing Hazard - Carbon Monoxide Gas
Install water heater in accordance with
the Instruction Manual and NFPA 54 or
CAN/CSA-B149.1.
To avoid injury, combustion and ventilation
air must be taken from outdoors.
Do not place chemical vapor emitting
products near water heater.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
For safe operation an adequate supply of fresh uncontaminated air for
combustionandventilationmustbeprovided.
An insufcient supply of air can cause recirculation of combustion
products resulting in contamination that may be hazardous to life.
Suchaconditionoftenwillresultinayellow,luminousburnerame,
causingsootingofthecombustionchamber,burnersanduetubes
andcreatesariskofasphyxiation.
Donotinstallthewaterheaterinaconnedspaceunlessanadequate
supplyofairforcombustionandventilationisbroughtintothatspace
usingthemethodsdescribedintheConnedSpacesectionthatfollows.
Neverobstructtheowofventilationair.Ifyouhaveanydoubtsor
questionsatall,call yourgassupplier.Failuretoprovidetheproper

13
amountofcombustionaircanresultinareorexplosionandcauseproperty
damage,seriousbodilyinjuryordeath.
UNCONFINED SPACE
AnUnconfinedSpaceisonewhosevolumeisnotlessthan50
cubic feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the
totalinputratingofallappliancesinstalledinthespace.Rooms
communicatingdirectlywiththespace,inwhichtheappliances
are installed, through openings not furnished with doors, are
consideredapartoftheunconfinedspace.
Makeupairrequirementsfortheoperationofexhaustfans,kitchen
ventilationsystems, clothes dryersand fireplaces shallalso be
considered in determining the adequacy of a space to provide
combustion,ventilationanddilutionair.
UNUSUALLY TIGHT CONSTRUCTION
Inunconfinedspacesinbuildings,infiltrationmaybeadequateto
provideairforcombustion,ventilationanddilutionoffluegases.
However,inbuildingsofunusuallytightconstruction(forexample,
weatherstripping,heavilyinsulated,caulked,vaporbarrier,etc.)
additionalairmustbeprovidedusingthemethodsdescribedin
theConfinedSpacesectionthatfollows.
CONFINED SPACE
AConnedSpaceisonewhosevolumeislessthan50cubicfeetper
1,000Btu/hr(4.8cubicmetersperkW)ofthetotalinputratingofall
appliancesinstalledinthespace.
Openingsmustbeinstalledtoprovidefreshairforcombustion,ventilation
and dilution in conned spaces. The required size for the openings is
dependentonthemethodusedtoprovidefreshairtotheconnedspace
andthetotalBtu/hrinputratingofallappliancesinstalledinthespace.
DIRECT VENT APPLIANCES
Appliances installed in a Direct Vent conguration that derive all
air for combustion from the outdoor atmosphere through sealed
intakeairpipingarenotfactoredinthetotalapplianceinputBtu/hr
calculationsusedtodeterminethesizeofopeningsprovidingfresh
airintoconnedspaces.
EXHAUST FANS
Where exhaust fans are installed, additional air shall be provided
toreplacetheexhaustedair.Whenanexhaustfanisinstalledin
thesamespacewithawaterheater,sufficientopeningstoprovide
freshairmustbeprovidedthataccommodatetherequirements
forallappliancesintheroomandtheexhaustfan.Undersized
openingswillcauseairtobedrawnintotheroomthroughthewater
heater’sventsystemcausingpoorcombustion.Sooting,serious
damagetothewaterheaterandtheriskoffireorexplosionmay
result.Itcanalsocreateariskofasphyxiation.
LOUVERS AND GRILLES
Thefreeareasofthefreshairopeningsintheinstructionsthatfollowdonot
takeintoaccountthepresenceoflouvers,grillesorscreensintheopenings.
Therequiredsizeofopeningsforcombustion,ventilationanddilution
airshallbebasedonthe“netfreearea”ofeachopening.Wherethe
freeareathroughadesignoflouverorgrilleorscreenisknown,itshall
beusedincalculatingthesizeofopeningrequiredtoprovidethefree
areaspecied.Wherethelouverandgrilledesignandfreeareaarenot
known,itshallbeassumedthatwoodlouverswillhave25%freearea
andmetallouversandgrilleswillhave75%freearea.Nonmotorized
louversandgrillesshallbexedintheopenposition.
FRESH AIR OPENINGS FOR CONFINED SPACES
The following instructions shall be used to calculate the size,
number and placement of openings providing fresh air for
combustion, ventilation and dilution in confined spaces. The
illustrationsshowninthissectionofthemanualareareference
for the openings that provide fresh air into confined spaces
only.Donotrefertotheseillustrationsforthepurposeofvent
installation. See Venting Installation on page 18 for complete
ventinginstallationinstructions.
OUTDOOR AIR THROUGH TWO OPENINGS
FIGURE 8.
The confined space shall be provided with two permanent
openings,onecommencingwithin12inches(300mm)ofthetop
andonecommencingwithin12inches(300mm)ofthebottomof
the enclosure. The openings shall communicate directly with the
outdoors. See Figure 8.
Eachopeningshallhaveaminimumfreeareaof1squareinchper
4,000Btu/hr(550mm2perkW)oftheaggregateinputratingofall
appliancesinstalledintheenclosure.Eachopeningshallnotbeless
than100squareinches(645cm2).
OUTDOOR AIR THROUGH ONE OPENING
FIGURE 9.
Alternatively a single permanent opening, commencing within 12
inches(300mm)ofthetopoftheenclosure,shallbeprovided.See
Figure9.Thewaterheatershallhaveclearancesofatleast1inch
(25mm)fromthesidesandbackand6inches(150mm)fromthe
frontoftheappliance.Theopeningshalldirectlycommunicatewith
theoutdoorsorshallcommunicatethroughaverticalorhorizontalduct
totheoutdoorsorspacesthatfreelycommunicatewiththeoutdoors
andshallhaveaminimumfreeareaofthefollowing:
1. 1 square inch per 3000 Btu/hr (733 mm2 per kW) of the total
inputratingofallapplianceslocatedintheenclosure,and
2. Notlessthanthesumoftheareasofallventconnectorsin
thespace.

14
OUTDOOR AIR THROUGH TWO HORIZONTAL DUCTS
FIGURE 10.
Theconnedspaceshallbeprovidedwithtwopermanenthorizontal
ducts,onecommencingwithin12 inches (300mm)ofthetopand
one commencing within 12 inches (300 mm) of the bottom of the
enclosure.Thehorizontalductsshallcommunicatedirectlywiththe
outdoors. See Figure 10.
Eachductopeningshallhaveaminimumfreeareaof1squareinch
per2,000Btu/hr(1100mm2perkW)oftheaggregateinputratingof
allappliancesinstalledintheenclosure.
Whenductsareused,theyshallbeofthesamecrosssectionalarea
asthefreeareaoftheopeningstowhichtheyconnect.Theminimum
dimensionofrectangularairductsshallbenotlessthan3inches.
OUTDOOR AIR THROUGH TWO VERTICAL DUCTS
The illustrations shown in this section of the manual are a
reference for the openings that provide fresh air into conned
spacesonly.
DO NOT refer to these illustrations for the purpose of vent
installation. See Venting Installation on page 18 for complete
ventinginstallationinstructions.
FIGURE 11.
Theconned space shall be providedwith twopermanent vertical
ducts,onecommencingwithin12 inches (300mm)ofthetopand
one commencing within 12 inches (300 mm) of the bottom of the
enclosure. The vertical ducts shall communicate directly with the
outdoors. See Figure 11.
Eachductopeningshallhaveaminimumfreeareaof1squareinch
per4,000Btu/hr(550mm2perkW)oftheaggregateinputratingof
allappliancesinstalledintheenclosure.
Whenductsareused,theyshallbeofthesamecrosssectionalarea
asthefreeareaoftheopeningstowhichtheyconnect.Theminimum
dimensionofrectangularairductsshallbenotlessthan3inches.
AIR FROM OTHER INDOOR SPACES
FIGURE 12.
Theconnedspaceshallbeprovidedwithtwopermanentopenings,
one commencing within 12 inches (300 mm) of the top and one
commencingwithin12inches(300mm)ofthebottomoftheenclosure.
See Figure 12.
Eachopeningshallcommunicatedirectlywithanadditionalroom(s)
ofsufcientvolumesothatthecombinedvolumeofallspacesmeets
thecriteriaforanUnconnedSpace.
Eachopeningshallhaveaminimumfreeareaof1squareinchper
1,000Btu/hr(2200mm2perkW)oftheaggregateinputratingofall
appliancesinstalledintheenclosure.Eachopeningshallnotbeless
than100squareinches(645cm2).
VENTING

15
Ifthewaterheaterisbeinginstalledasareplacementforanexisting
heaterinpre-existingventing,athoroughinspectionofexistingventing
systemmustbeperformedpriortoanyinstallationwork.
VENTDAMPERS-Anyventdamper,whetheritisoperatedthermally
or otherwise must be removed if its use inhibits proper drafting of the
water heater.
ThermallyOperatedVentDampers:thisgas-redwaterheaterhas
athermalefciencyatorabove80%whichmayproducearelatively
lowuegastemperature.Suchtemperaturesmaynotbehighenough
toproperlyopenthermallyoperatedventdampers.Thiswouldcause
spillageoftheuegasesandmaycausecarbonmonoxidepoisoning.
Ventdampersmustbearevidenceofcerticationascomplyingwith
thecurrenteditionoftheAmericanNationalStandardANSIZ21.66
CGA 6.14 (covering electrically and mechanically actuated vent
dampers).Beforeinstallationofanyventdamper,consultthelocal
gasutilityforfurtherinformation.
Toinsureproperventingofthisgas-redwaterheater,thecorrect
ventpipediametermustbeutilized.Anyadditionsordeletionsof
othergasappliancesonacommonventwiththiswaterheatermay
adverselyaffecttheoperationofthewaterheater.Consultyourgas
supplierifanysuchchangesareplanned.
Forproper venting in certain installations, a largerdiameter vent
pipe may be necessary. Consult your gas supplier to aid you in
determiningtheproperventingforyourwaterheaterfromthevent
tablesinthecurrenteditionoftheNationalFuel Gas CodeANSI
Z223.1/NFPA54ortheNaturalGasandPropaneInstallationCode
CAN\CSA B 149.1.
Periodically check the venting system for signs of obstruction or
deteriorationandreplaceifneeded.
Thecombustionandventilationairowmustnotbeobstructed.
Thewaterheaterwithdrafthoodinstalledmustbeconnectedtoa
chimneyorlistedventpipesystem,whichterminatestotheoutdoors.
Never operate the water heater unless it is vented to the outdoors
and has adequate air supply to avoid risks of improper operation,
explosionorasphyxiation.
• For proper draft hood attachment, the draft hood legs may be
angledslightlyinward.
• Placethedrafthoodlegsinthereceivingholesonthetopofthe
water heater. The legs will snap in the holes to give a tight t.
Securedrafthoodwiththesuppliedbrackets.
• Placetheventpipeoverthedrafthood.Withtheventpipeinposition,
drillasmallholethroughboththeventpipeanddrafthood.Secure
themtogetherwithasheetmetalscrew.SeeFigure13.
Obstructedordeterioratedventsystemsmaypresentserioushealth
riskorasphyxiation.
FIGURE 13.
The vent pipe from the water heater must be no less than the
diameter of the draft hood outlet on the water heater and must
slopeupwardatleast1/4inchperlinearfoot(21mmpermeter).
See Figure 14.
Allvent gasesmust becompletely ventedto theoutdoors ofthe
structure(dwelling). Install onlythedrafthood provided withthe
new water heater and no other draft hood.
Ventpipesmustbesecuredateachjointwithsheetmetalscrews.
FIGURE 14.
Theremustbeaminimumof6”(153mm)clearancebetweensingle
wall vent pipe and any combustible material.  Fill and seal any
clearancebetweensinglewallventpipeandcombustiblematerial
withmortarmix,cement,orothernoncombustiblesubstance.For
other than single wall, follow vent pipe manufacturer’s clearance
specications.Toinsureatighttoftheventpipeinabrickchimney,
sealaroundtheventpipewithmortarmixcement.
Failure to have required clearances between vent piping and
combustiblematerialwillresultinarehazard.
Be sure vent pipe is properly connected to prevent escape of
dangerousuegaseswhichcouldcausedeadlyasphyxiation.
Chemicalvaporcorrosionoftheflueandventsystemmayoccur
ifairforcombustioncontainscertainchemicalvapors.Spraycan
propellants,cleaning solvents,refrigeratorandairconditioner
refrigerants, swimming pool chemicals, calcium and sodium
chloride, waxes, bleach and process chemicals are typical
compoundswhicharepotentiallycorrosive.

16
GAS PIPING
Contact your local gas service company to ensure that adequate
gasserviceisavailableandtoreviewapplicableinstallationcodes
foryourarea.
SizethemaingaslineinaccordancewithTable3.Theguresshown
areforstraightlengthsofpipeat0.5in.W.C.pressuredrop,whichis
considerednormalforlowpressuresystems.Note:Fittingssuchas
elbows, tees and line regulators will add to the pipe pressure drop.
AlsorefertothecurrenteditionsoftheNationalFuelGasCode(NFPA
54)orNaturalGasandPropaneInstallationCode(CAN/CSAB149.1).
Makesuregassuppliedissametypelistedonmodelratingplate.The
inletgaspressuremustnotexceed14inchwatercolumn(2.6kPa)
fornaturalandpropane(L.P.)gas.Theminimuminletgaspressure
shownonratingplateisthatwhichwillpermitringatratedinput.
Ifthegascontrolvalveissubjectedtopressuresexceeding1/2pound
persquareinch(3.5kPa),thedamagetothegascontrolvalvecould
resultinareorexplosionfromleakinggas.
Ifthemaingaslineshut-offservingallgasappliancesisused,also
turn“off”thegasateachappliance.Leaveallgasappliancesshut
“off”untilthewaterheaterinstallationiscomplete.
Agaslineofsufcientsizemustberuntothewaterheater.Consult
thecurrenteditionofNationalFuelGasCodeANSIZ223.1/NFPA54
ortheNaturalGasandPropaneInstallationCodeCAN/CSAB149.1
andyourgassupplierconcerningpipesize.
Theremustbe:
• A readilyaccessiblemanualshutoffvalveinthe gas supplyline
serving the water heater, and
• Asedimenttrapaheadofthegascontrolvalvetohelppreventdirt
andforeignmaterialsfromenteringthegascontrolvalve.
• Aexiblegasconnectororagroundjointunionbetweentheshut
offvalveandcontrolvalvetopermitservicingoftheunit.
Besuretocheckallthegaspipingforleaksbeforelightingthewater
heater.Useasoapywatersolution,notamatchoropename.Rinse
offsoapysolutionandwipedry.
The minimum inlet gas pressure shown on the rating plate is that
whichwillpermitringattheratedinput.
TABLE 3. GAS SUPPLY LINE SIZES (IN INCHES)*
MAXIMUM CAPACITY OF PIPE IN CUBIC FEET PER HOUR
LENGTH
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"
351 105 199 410 615 1160 1845 3221 6735
635 73 142 278 428 805 1277 2255 4626
928 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
Usepipejointcompoundorteontapemarkedasbeingresistantto
theactionofpetroleum[Propane(L.P.)]gases.
Thewaterheateranditsgasconnectionmustbeleaktestedbefore
placingthewaterheaterinoperation.
The water heater and its individual shut-off valve shall be
disconnectedfromthegassupplypipingsystemduringanypressure
testingofthatsystemattestpressuresinexcessof1/2poundper
squareinch(3.5kPa).Itshallbeisolatedfromthegassupplypiping
system by closing its individual manual shut-off valve during any
pressuretestingofthegassupplypipingsystem at test pressures
equaltoorlessthan1/2poundpersquareinch(3.5kPa).
Connectingthegaspipingtothegascontrolvalveofthewaterheater
canbeaccomplishedbyeitherofthetwomethodsshowninFigures
15 and 16.
FIGURE 15. GAS PIPING WITH FLEXIBLE CONNECTOR.
FIGURE 16. GAS PIPING WITH ALL
BLACK IRON PIPE TO GAS CONTROL.

17
SEDIMENT TRAPS
Asedimenttrapshallbeinstalledasclosetotheinletofthewater
heateraspracticalatthetimeofwaterheaterinstallation.The
sedimenttrapshallbeeitherateefittingwithacappednipple
inthebottomoutletorotherdevicerecognizedasaneffective
sediment trap. If a tee fitting is used, it shall be installed in
conformance with one of the methods of installation shown in
the Figures 15 and 16.
Contaminantsinthegaslinesmaycauseimproperoperationof
thegascontrolvalvethatmayresultinfireorexplosion.Before
attachingthegaslinebesurethatallgaspipeiscleanonthe
inside.Totrapanydir torforeignmaterialinthegassupplyline,
asedimenttrapmustbeincorporatedinthepiping.Thesediment
trapmustbereadilyaccessible.Installinaccordancewiththe
“GasPiping”section.RefertothecurrenteditionoftheNational
FuelGasCode,ANSIZ223.1/NFPA54ortheNaturalGasand
PropaneInstallationCodeCAN/CSAB149.1.

18

19
FOR YOUR SAFETY READ BEFORE LIGHTING
BEFORE LIGHTING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED AT FAUCETS.
WARNING: If you do not follow these instructions exactly, a re or
explosion may result causing property damage, personal injury or loss of life.
1.STOP!Readthesafetyinformationaboveon
this label.
2. Set the thermostat to the lowest setting by turning
thermostatdialfullyclockwise until it stops.
3. Push the gas control knob down slightly and turn
clockwise to“OFF”(FigureA).
 NOTE:GascontrolknobCANNOTbeturnedfrom“PILOT”
 to“OFF”unlessitispusheddownslightly.Donotforce.
4. Removethe innerand outerdoors located below and
behindthegascontrolunit.
5. Wait ve (5)minutes to clearoutany gas.Ifyou then
smellgasSTOP!Follow“B”inthesafetyinformation
aboveonthislabel.Ifyoudonotsmellgas,go
to the next step.
6. Find Pilot. Follow metal tube from the bottom , right of
thegascontroltothepilotburner.(FigureD).
7. Turngascontrolknobcounterclockwise to“PILOT”
(FigureB).
8.Pushgascontrolknobdownallthewayandholdit down.
   Immediately light the pilot with a match. Continue to
holdthe gas control knob down for about one (1) minute
after thepilotislit.Releasethegascontrolknobanditwill
popbackup.Pilotshouldremainlit.Ifitgoesout,repeat
Steps3through8.Itmaytakeseveralminutesforairto
clearthelines,beforethepilotwilllight.
• If knob does not pop up when released, stop and
   immediatelycallyourservicetechnicianorgas 
supplier.
• Ifthepilotwillnotstaylitafterseveraltries,turnthe
   gascontrolknobto“OFF”(FigureA)andcallyour
   servicetechnicianorgassupplier.
9. Replaceinnerandouterburnerdoors.
10. Atarm’slengthaway,turnthegascontrolknob 
 counterclockwise to“ON”(FigureC).
11. Setthermostattodesiredsetting(SeeFigure).
CAUTION: Hotter water increases the risk of
scald injury. Consult the instruction manual
before changing temperature.
LIGHTING INSTRUCTIONS
TO TURN OFF GAS TO APPLIANCE
1. Set the thermostat to lowest setting. 2. Pushgascontrolknobdownslightlyandturnclockwise
to“OFF”.Donotforce,seeFigureA.
TOP VIEW FIGURE “D”
GAS CONTROL
A. Thisappliancehasapilotwhichmustbelightedbyhand.
Whenlightingthepilot,followtheseinstructionsexactly.
B. BEFORE LIGHTING:smellallaroundtheappliance
areaforgas.Besuretosmellnexttotheoorbecause
somegasisheavierthanairandwillsettleontheoor.
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 
 redepartment.
C. Useonlyyourhandtopushdownorturnthegascontrol
knob. Never use tools. If the knob will not push down or
turnbyhand,don’ttrytorepairit,callaqualiedservice
technician.Forceorattemptedrepairmayresultinare
or explosion.
D. Do not use this appliance if any part has been under
water.Immediatelycontactaqualiedinstallerorservice
agencytoreplaceaoodedwaterheater.Donotattempt
torepairtheunit!Itmustbereplaced!

20
START UP CONDITIONS
DRAFT HOOD OPERATION
Check draft hood operation by performing a worst case
depressurization of the building. With all doors and windows
closed, and with all air handling equipment and exhaust fans
operating such as furnaces, clothes dryers, range hoods and
bathroomfans,amatchameshouldstillbedrawnintothedraft
hoodofthewaterheaterwithitsburnerring.Iftheameisnot
drawn toward the draft hood, shut off water heater and make
necessaryairsupplychangestocorrect.
CONDENSATION
Whenever the water heater is filled with cold water, some
condensatewillformwhiletheburnerison.Awaterheatermay
Shortrepeatedheatingcyclescausedbysmallhotwaterusescan
causetemperaturesat the pointofuse to exceedthethermostat
settingbyupto30°F(16.7°C).Ifyouexperiencethistypeofuse
you should consider using lower temperature settings to reduce
scaldhazards.
Anywaterheater’sintendedpurposeistoheatwater.Hotwater
isneededforcleansing,cleaning,andsanitizing(bodies,dishes,
clothing). Untempered hot water can present a scald hazard.
Depending on the time element, and the people involved (adults,
children, elderly, inrm, etc.) scalding may occur at different
temperatures.
HOTTER WATER CAN SCALD: Water heaters are intended to
producehotwater.Waterheatedtoatemperaturewhichwillsatisfy
spaceheating,clotheswashing,dishwashing,andothersanitizing
needscanscaldandpermanentlyinjure you uponcontact.Some
peoplearemorelikelytobepermanentlyinjuredbyhotwaterthan
others.Theseincludetheelderly,children,theinrm,orphysically/
mentallyhandicapped.Ifanyoneusinghotwaterinyourhomets
intooneofthesegroupsorifthereisalocalcoderequiringacertain
temperaturewateratthehotwatertap,thenyoumusttakespecial
precautions. In addition to using the lowest possible temperature
settingthatsatisesyourhotwaterneeds,ameanssuchasamixing
valveshouldbeusedatthehotwatertapsusedbythesepeopleor
atthewaterheater.Mixingvalvesareavailableatplumbingsupplyor
hardwarestores,seeFigure2.Followmanufacturer’sinstructionsfor
installationofthevalves.Beforechangingthefactorysettingonthe
thermostat,readthe“TemperatureRegulation”sectioninthismanual,
see Figures 17 and 18.
TEMPERATURE REGULATION
FOR YOUR INFORMATION
appeartobeleakingwheninfactthewateriscondensation.This
usuallyhappenswhen:
a.Anewwaterheaterislledwithcoldwaterforthersttime.
b.Burninggasproduceswatervaporinwaterheaters,par ticularly
highefciencymodelswhereuetemperaturesarelower.
c.Largeamountsofhotwaterareusedinashorttimeandthe
rellwaterinthetankisverycold.
Moisturefromtheproductsofcombustioncondenseonthecooler
tanksurfaces and form drops of water whichmay fallonto the
burnerorotherhotsurfacestoproducea“sizzling”or“frying”noise.
Excessive condensation can cause pilot outage due to water
running down the flue tube onto the main burner and putting out
the pilot.
Neverallowsmallchildrentouseahotwatertap,ortodrawtheirown
bathwater.Neverleaveachildorhandicappedpersonunattended
in a bathtub or shower.
NOTE:Awatertemperaturerangeof120°F-140°F(49°C-60°C)is
recommendedbymostdishwashermanufacturers.
Thethermostatofthiswaterheaterhasbeenfactorysetatitslowest
position (PILOT LIGHTING). It is adjustable and must be reset to
the desired temperature setting to reduce the risk of scald injury.
The mark ( )indicativeofapproximately120°F(49°C)ispreferred
starting point. Some States have a requirement for a lower setting.
Turn the water temperature dial clockwise (  ) to decrease the
temperature,orcounterclockwise( )toincreasethetemperature.
Shouldoverheatingoccurorthegassupplyfailtoshutoff,turnoffthe
manualgascontrolvalvetothewaterheater.
FIGURE 17.
Water
Temperature °F
Time for
1st Degree Burn
(LessSevereBurns)
Time for Permanent Burns
2nd & 3rd Degree
(MostSevereBurns)
110
(normalshowertemp.)
116 (painthreshold)
116 35 minutes 45 minutes
122 1 minute 5 minutes
131 5seconds 25seconds
140 2seconds 5seconds
149 1second 2seconds
154 instantaneous 1second
(U.S.GovernmentMemorandum,C.P.S.C.,PeterL.Armstrong,Sept.15,1978)
FIGURE 18.