State Water Heaters SBS75-76-NE User manual

Category
Water heaters & boilers
Type
User manual

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1
Instruction Manual
PRINTED 1115 197659-005
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.
INSTALLATION - OPERATION
- SERVICE - MAINTENANCE
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.
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 neighbors phone. Follow the
gas suppliers 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.
Low Lead Content
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
SupplyGasRegulator ............................................... 15
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
RECOMMENDED PROCEDURE FOR PERIODIC
REMOVAL OF LIME DEPOSITS FROM TANK
TYPE COMMERCIAL WATER HEATERS ........................ 23
DelimingSolvents...................................................... 24
TankCleanoutProcedure .......................................... 24
DelimingUsingFlo-JugMethod ................................ 24
DrainingandFlushing ............................................... 25
Service ...................................................................... 25
LEAKAGE CHECKPOINTS .............................................. 26
TROUBLESHOOTING GUIDELINES ............................... 27
WATER PIPING DIAGRAMS .......................................28-33
NOTES ............................................................................. 34
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.
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
Improper installation, use and service may
result in property damage.
CAUTION
Do not operate water heater if any part has been
exposed to flooding or water damage.
Inspect anode rods regularly, replace when significantly depleted.
Install in location with drainage.
Fill tank with water before operation.
Properly sized thermal expansion tanks are required on all
closed water systems.
Refer to this manual for installation and service.
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-fired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c omplies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
Model Units A B C D E F G H J K L M
75
Natural & LP
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
100
Natural & LP
Inches
CM
685/8
174.3
661/2
168.9
3015/16
78.59
273/4
70.5
153/16
38.6
4
10.2
153/4
40.0
16
40.6
11/4
3.2
11/4
NPT
1/2
NPT
1115/16
30.3
RECOVERY RATINGS
Model
Input
Approx.
Gal.
Cap.
Approx.
Liter
Cap.
Temp.
Rise
17 22 28 33 39 44 50 56 61 67 72 78
Rating
Btu/Hr
Rating
kW
30 40 50 60 70 80 90 100 110 120 130 140
75 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
100 75,100 22 98 371
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-CSA4.3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 manufacturers
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UTILITYAREAS,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heaters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ameandmain
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andapproved
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orstatelaw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.Aproperly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exhaustfans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freeareaarenot
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onpage14forcompleteventing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 mm
2
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forcompleteventing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theenclosure.
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/CSAB149.1).
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.
Agas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:
• Areadily 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"
3 51 105 199 410 615 1160 1845 3221 6735
6 35 73 142 278 428 805 1277 2255 4626
9 28 59 110 225 346 644 1031 1830 3748
12 24 50 94 193 290 556 878 1552 3192
15 21 44 83 170 264 492 776 1391 2840
18 19 40 76 155 237 445 703 1259 2577
21 18 37 70 143 220 410 659 1142 2372
24 17 35 64 135 202 381 600 1083 2196
27 16 32 60 126 190 357 571 1010 2108
31 15 30 57 117 182 337 542 952 1962
38 13 27 51 105 161 299 483 864 1757
46 12 25 47 95 146 278 439 776 1610
53 11 23 42 88 135 249 401 717 1464
61 10 21 40 82 126 234 375 688 1347
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
Asediment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dirt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
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orstatelaw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 ticular ly
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:Awater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.
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State Water Heaters SBS75-76-NE User manual

Category
Water heaters & boilers
Type
User manual
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