A.O. Smith 197835-001 User manual

Category
Water heaters & boilers
Type
User manual

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1
Instruction Manual
PRINTED IN THE U.S.A 0408 197833-000
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
POWER VENT/POWER DIRECT VENT GAS MODELS
WITH HOT SURFACE IGNITION
ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS
PURCHASED. IF YOU ARE UNSUCCESSFUL, CALL THE TECHNICAL SUPPORT PHONE NUMBER SHOWN ON THE WATER HEATER LABELING.
COMMERCIAL GAS WATER HEATERS
For Your Safety
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
Ashland City, TN 37015
www.hotwater.com
2
SAFE INSTALLATION, USE AND SERVICE
Your safety and the safety of others is extremely important in the installation, use and servicing of this water heater.
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
appliance can cause low level exposure to some of the substances listed, including formaldehyde, carbon monoxide and soot.
IMPORTANT DEFINITIONS
• Qualied 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,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.”.
Gas Supplier: TheNatural Gasor Propane Utilityor servicewho suppliesgas forutilization bythe gasburning
applianceswithinthisapplication.Thegassuppliertypicallyhasresponsibilityfortheinspectionandcodeapprovalof
gaspipinguptoandincludingtheNaturalGasmeterorPropanestoragetankofabuilding.
3
GENERAL SAFETY
4
GENERAL SAFETY
5
Thank Youforpurchasingthiswaterheater.Properlyinstalledand
maintained,itshouldgiveyouyearsoftroublefreeservice.
Abbreviations Found In This Instruction Manual:
• CSA-CanadianStandardsAssociation
• ANSI-AmericanNationalStandardsInstitute
• NFPA-NationalFireProtectionAssociation
• ASME-AmericanSocietyofMechanicalEngineers
• GAMA-GasApplianceManufacturer’sAssociation
• UL-UnderwritersLaboratoriesInc.
This gas-red water heater is design certied by Underwriters
LaboratoriesInc.underAmericanNationalStandard/CSAStandard
forGasWaterHeatersANSIZ21.10.3•CSA4.3(currentedition).
PREPARING FOR THE INSTALLATION
1. Read the“General Safety” section,page3and 4 ofthismanual
rst 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/ORPROPERTY
DAMAGE.
Thismanualcontainsinstructionsfortheinstallation,operation,
andmaintenanceofthegas-red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rst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installationmustcomplywiththecurrenteditionsofthe
NationalFuelGasCode,ANSIZ223.1/NFPA54andtheNational
ElectricalCode,NFPA70orCAN/CSA-B149.1,theNaturalGasand
PropaneInstallationCodeandCSAC22.1,theCanadianElectrical
Code.AlldocumentsareavailablefromtheCanadianStandards
Association, 8501 East Pleasant Valley Road, Cleveland, OH 44131.
NFPAdocumentsarealsoavailablefromtheNationalFireProtection
Association,1BatterymarchPark,Quincy,MA02269.
3. Thewaterheater when installed must be grounded in accordance
with the local codes, or in the absence of local codes: the National
ElectricalCode(NFPA70)ortheCanadianElectricalCode(C22.1).
4.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.
5.Carefully plan the place where youare going to put the water
heater.Correctcombustion,ventaction,andventpipeinstallation
are very important in preventing death from possible carbon
monoxidepoisoningandres,seeFigures1and2.
Examinethelocationtoensurethewaterheatercomplieswith
the“FactstoConsiderAboutLocation”sectioninthismanual.
6.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OfceoftheState
Architect,400PStreet,Sacramento,CA95814.
7. 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,Seepage8.
8.ComplieswithSCAQMDrule#1146anddistrictshavingequivalent
NOxrequirements.
INTRODUCTION
TABLE OF CONTENTS
SAFE INSTALLATION, USE AND SERVICE............................2
GENERAL SAFETY..................................................................3
TABLE OF CONTENTS ............................................................5
INTRODUCTION ......................................................................5
PreparingfortheInstallation .............................................5
Get to Know Your Water Heater ........................................6
INSTALLATION CONSIDERATIONS .......................................7
RoughInDimensions........................................................7
CommonwealthofMassachusetts ....................................8
WaterPiping-MixingValveUsage ...................................9
Facts to Consider About Location ...................................10
InsulationBlankets ..........................................................11
CombustionAirandVentilation .......................................11
AppliancesinUnconnedSpaces ...........................11
AppliancesinConnedSpaces ..............................11
INSTALLING THE WATER HEATER ..................................... 13
ChemicalVaporCorrosion ..............................................13
WaterPiping ...................................................................13
Temperature-PressureReliefValve ................................14
GasPiping ......................................................................15
SedimentTraps ...............................................................16
FillingtheWaterHeater ..................................................16
Venting ............................................................................16
VentPipeTermination ............................................... 16-17
PlanningtheVentSystem ...............................................19
Condensate.....................................................................19
InstallationofVentSystem..............................................20
VentTerminalInstallation,Sidewall .................................20
SequenceofInstallations,Figure18A ............................20
DirectVenting..................................................................20
DirectVentTerminalInstallation ......................................20
Installation Sequence......................................................21
VerticalVentTerminalInstallation ...................................21
InstallationofVentSystem,Sidewall ..............................22
InstallationofVerticalVentSystem .................................22
VentPipePreparation .....................................................26
Controls and Switches ....................................................28
PowerVentWiringSchematic.........................................29
LIGHTING & OPERATING LABEL .........................................30
TEMPERATURE REGULATION ............................................31
USING THE ELECTRONIC CONTROLLER ..........................32
FOR YOUR INFORMATION ...................................................36
StartUpConditions
Smoke/Odor ............................................................36
ThermalExpansion .................................................36
StrangeSounds ......................................................36
OperationalConditions ...................................................36
SmellyWater ...........................................................36
“Air”inHotWaterFaucets .......................................36
PERIODIC MAINTENANCE ...................................................37
VentingSystemInspection..............................................37
BurnerOperationandInspection ....................................37
BurnerCleaning ..............................................................37
Housekeeping .................................................................37
AnodeRodInspection.....................................................38
Temperature-PressureReliefValveOperation ...............38
Draining...........................................................................38
Service ............................................................................39
LEAKAGE CHECKPOINTS ....................................................39
TROUBLESHOOTING ...........................................................40
NOTES ...................................................................................41
WARRANTY ...........................................................................42
6
* CAUTION HARNESS HAS 120 VAC. IN OPERATION.
** See “Planning the Vent System,” “Installation of Vent System” and “Condensate” for more information.
FIGURE 1.
VACUUM RELIEF
VALVE
*INSTALL PER
LOCAL CODES
M Display Enclosure
** N Exhaust Elbow Assembly
** O Condensate Tubing
P Off/On Switch
Q Display Label
R Hot Water Outlet
*S Electrical Outlet (120VAC)
T Gas Supply
U Main Manual Gas Shutoff Valve
V Union
W Inlet Water Shutoff Valve
X Cold Water Inlet
GET TO KNOW YOUR WATER HEATER - GAS MODELS
A Control Assembly
B Blocked Inlet Switch
C Blocked Outlet Switch
D Fan Prover Switch
E Blower Assembly
F Burner Assembly
G Flame Sensor
H Hot Surface Igniter
I Junction Box
J Gas Valve Assembly
K Display Board
L Top Plastic Enclosure
Y Inlet Dip Tube
Z T/P Relief Valve
AA Rating Plate
BB Labels
CC Drain Valve
** DD Vent Terminal
EE Drain Pan
FF Anode
GG Insulation
HH Upper Temperature Probe
II Access Door
REPLACEMENT PARTS AND DELIMING PRODUCTS
Replacementpartsandrecommendeddelimermaybeorderedthrough
authorizedservicersordistributors.Whenorderingparts,providecomplete
modelandserialnumbers(see ratingplate),quantityandname ofpart
desired.Standardhardwareitemsmaybepurchasedlocally.
Caution:
Thisaccesspanelcovers
a 2” NPT plug that was required
during the manufacturing of this
waterheater.This2”NPTangeis
not a cleanout tting,removingthe
2”NPTplugandusingthisttingasa
cleanout could void your warranty.
ACCESS PANEL
7
Rough-In-Dimensions
Model Units A B C D E F
100
Inches 68.50 49.25 22.00 15.75 3.00 8.00
cm 174 125.09 55.88 40.00 7.62 20.32
Top/Side Inlet and Outlet: 3/4” NPT
Gas Inlet: 1/2” NPT
Capacity, Gas and Electrical Characteristics
Model
ApproximateCapacity Manifold Pressure Electrical Characteristics
U.S. Gals. Liters GasType “WC kPA Volts/Hz Amperes
100 50 189 Nat./LP 0” 0” 120/60 <5
All models - Maximum Supply Pressure: 14 inches W.C. (3.48kPa)
Minimum Supply Pressure for Natural Gas: 3.50” (.87kPa)
Minimum Supply Pressure for Propane Gas: 8.00” (1.99kPa)
Minimum pressure must be maintained under both load and no load (dynamic and static) conditions.
Recovery Capacities - U.S. Gallons/Hr. and Liters/Hr. at Temperature Rise Indicated
Model
Input RecoveryCapacities
Rating
(Btu/hr)
Rating
(kW)
Temp.
Rise
F 30 40 50 60 70 80 90 100 110 120 130 140
C 17 22 28 33 39 44 50 56 61 67 72 78
100 100,000 29.3
GPH 387 291 233 194 166 145 129 116 106 97 90 83
LPH 1465 1102 882 734 628 549 488 439 401 367 341 314
Recovery capacity based on 96% thermal efciency
INSTALLATION CONSIDERATIONS
ROUGH IN DIMENSIONS
FIGURE 1A.
8
Forallsidewallterminated,horizontallyventedpowervent,directvent,andpowerdirectventgasfueledwaterheaters
installedineverydwelling,buildingorstructureusedinwholeorinpartforresidentialpurposes,includingthoseowned
oroperatedbytheCommonwealthandwherethesidewallexhaustventterminationislessthanseven(7)feetabove
finishedgradeinthe area oftheventing,includingbutnot limitedtodecksandporches, thefollowing requirements
shall be satisfied:
INSTALLATION OF CARBON MONOXIDE DETECTORSAtthetimeofinstallationofthesidewallhorizontalventedgasfueled
equipment,theinstallingplumberorgasttershallobservethatahardwiredcarbonmonoxidedetectorwithanalarmandbatteryback-up
isinstalledontheoorlevelwherethegasequipmentistobeinstalled.Inaddition,theinstallingplumberorgasttershallobservethat
abatteryoperatedorhardwiredcarbonmonoxidedetectorwithanalarmisinstalledoneachadditionallevelofthedwelling,building
orstructureservedbythesidewallhorizontalventedgasfueledequipment.Itshallbetheresponsibilityofthepropertyownertosecure
theservicesofqualiedlicensedprofessionalsfortheinstallationofhardwiredcarbonmonoxidedetectors.
Intheeventthatthesidewallhorizontallyventedgasfueledequipmentisinstalledinacrawlspaceoranattic,thehard
wiredcarbonmonoxidedetectorwithalarmandbatteryback-upmaybeinstalledonthenextadjacentoorlevel.
Intheeventthattherequirementsofthissubdivisioncannotbemetatthetimeofcompletionofinstallation,theownershall
haveaperiodofthirty(30)daystocomplywiththeaboverequirementsprovidedthatduringsaidthirty(30)dayperiod,a
batteryoperatedcarbonmonoxidedetectorwithanalarmshallbeinstalled.
APPROVED CARBON MONOXIDE DETECTORSEachcarbonmonoxidedetectorasrequiredinaccordancewiththe
aboveprovisionsshallcomplywithNFPA720andbeANSI/UL2034listedandCSAcertied.
SIGNAGE Ametalorplasticidenticationplateshallbepermanentlymountedtotheexteriorofthebuildingataminimum
heightofeight(8)feetabovegradedirectlyinlinewiththeexhaustventterminalforthehorizontallyventedgasfueled
heatingapplianceorequipment.Thesignshallread,inprintsizenolessthanone-half(1/2)inchinsize,“GAS VENT
DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS.”
INSPECTION Thestateorlocalgasinspectorofthesidewallhorizontallyventedgasfueledequipmentshallnotapprovethe
installationunless,uponinspection,theinspectorobservescarbonmonoxidedetectorsandsignageinstalledinaccordance
withtheprovisionsof248CMR5.08(2)(a)1through4.
EXEMPTIONS:Thefollowingequipmentisexemptfrom248CMR5.08(2)(a)1through4:
1.TheequipmentlistedinChapter10entitled“EquipmentNotRequiredToBeVented”inthemostcurrenteditionofNFPA
54asadoptedbytheBoard;and
2.ProductApprovedsidewallhorizontallyventedgasfueledequipmentinstalledinaroomorstructureseparatefromthe
dwelling,building,orstructureusedinwholeorinpartforresidentialpurposes.
MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM PROVIDEDWhenthemanufacturerofProduct
Approvedsidewallhorizontallyventedgasequipmentprovidesaventingsystemdesignorventingsystemcomponentswiththe
equipment,theinstructionsprovidedbythemanufacturerforinstallationoftheequipmentandtheventingsystemshallinclude:
1.Detailedinstructionsfortheinstallationoftheventingsystemdesignortheventingsystemcomponents;and
2.Acompletepartslistfortheventingsystemdesignorventingsystem.
MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM NOT PROVIDEDWhenthemanufacturer
ofaProductApprovedsidewallhorizontallyventedgasfueledequipmentdoesnotprovidethepartsforventingtheflue
gases,butidentifies“specialventingsystems,”thefollowingrequirementsshallbesatisfiedbythemanufacturer:
1.Thereferenced“specialventingsystem”instructionsshallbeincludedwiththeapplianceorequipmentinstallationinstructions;and
2.The“specialventingsystems”shallbeProductApprovedbytheBoard,andtheinstructionsforthatsystemshallinclude
apartslistanddetailedinstallationinstructions.
AcopyofallinstallationinstructionsforallProductApprovedsidewallhorizontallyventedgasfueledequipment,allventing
instructions,allpartslistsforventinginstructions,and/orallventingdesigninstructionsshallremainwiththeapplianceor
equipmentatthecompletionoftheinstallation.
INSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS
9
FIGURE 2.
WATER PIPING - MIXING VALVE USAGE
This appliance has been design certified as complying with
AmericanNationalStandard/CSAStandardforwaterheatersand
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:
Waterheatersareintendedtoproducehotwater.Waterheated
to a temperature which will satisfy space heating, clothes
washing, dish washing, and other sanitizing needs can scald
andpermanentlyinjureyouuponcontact.Somepeoplearemore
likelytobepermanentlyinjuredbyhotwaterthanothers.These
includetheelderly,children,andthephysicallyordevelopmentally
disabled.Ifanyoneusinghotwaterfromthisheaterfitsintoone
ofthesegroupsorifthereisalocalcodeorstatelawrequiring
acertaintemperaturewateratthehotwatertap,thenyoumust
takespecialprecautions.Inadditiontousingthelowestpossible
temperaturesettingthatsatisfiesyourhotwaterneeds,ameans
suchasaMixingValve,shallbeusedatthehotwatertapsused
by these people or at the water heater, see Figure 2. Mixing
valves are available at plumbing supply or hardware stores.
Consult a QualifiedInstaller or ServiceAgency. Follow mixing
valve manufacturer’s instructions for installation of the valves.
Beforechangingthefactorysettingonthethermostat,readthe
“TemperatureRegulation”sectioninthismanual.
* The side recirculation loop connections may not be used as the primary water inlet and outlet connections. For your convenience, plugs are installed
in these ttings at the factory. Remove these plugs if needed for your specic installation. Otherwise (as with all connections) check for leaks while
lling the tank with water and after completing the installation.
10
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
appliance. 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alocationindoorsascloseaspracticaltotheventterminalor
locationtowhichthewaterheaterventpipingisgoingtobeconnected,
andascentralizedwiththewaterpipingsystemaspossible.
2.Selectedlocationmustprovideadequateclearancesforservicing
andproperoperationofthewaterheater.
Installationofthewaterheatermustbeaccomplishedinsuchamanner
thatifthetankoranyconnectionsshouldleak,theowwillnotcause
damagetothestructure.Forthisreason,itisnotadvisabletoinstall
thewaterheaterinanatticorupperoor.Whensuchlocationscannot
beavoided,asuitabledrainpanshouldbeinstalledunderthewater
heater.Drainpansareavailableatyourlocalhardwarestore.Such
adrainpanmusthaveaclearanceofatleast1.0”(2.5cm)greater
thananypointonthewaterheater’souterjacketandmustbepiped
toanadequatedrain.Thepanmustnotrestrictcombustionairow.
Forexample,ifacircularpanisused,itmustbeaminimumof27”
(69cm)indiameter.SeeFigure1.
Waterheaterlifedependsuponwaterquality,waterpressureand
theenvironmentin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building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hotsurfaceigniteror
mainburner.Theresultingashbackandrecancausedeathor
serious burns to anyone in the area.
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
applianceextendingbeyondthefullwidthanddepthoftheappliance
byatleast3”(7.6cm)inanydirection,oriftheapplianceisinstalled
11
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.
Minimum clearances between the water heater and combustible
constructionare0inchatthesidesandrear,5.5”(14.0cm)fromthefront
and12”(30.5cm)fromthetop.(Standardclearance.)Ifclearances
stated on the heater differ from standard clearances, install water
heateraccordingtoclearancesstatedontheheater.
Adequateclearance24”(61.0cm)forservicingthisapplianceshouldbe
consideredbeforeinstallation,suchaschangingtheanodes,etc.
Aminimumclearance of5.5”(14.0cm)mustbeallowedfor accessto
replaceablepartssuchasthethermostats,drainvalveandreliefvalve.
When installing the heater, consideration must be given to proper
location.Locationselectedshouldbeasclosetothewallaspracticable
andascentralizedwiththewaterpipingsystemaspossible.
FIGURE 4.
INSULATION BLANKETS
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. Your water heater meets or
exceedstheEnergyPolicyActstandardswithrespecttoinsulationand
standbylossrequirements,makinganinsulationblanketunnecessary.
Shouldyouchoosetoapplyaninsulationblankettothisheater,you
should follow these instructions(For identication of components
mentionedbelow,seeFigure1).Failuretofollowtheseinstructions
canrestrictthe air ow required for proper combustion, potentially
resultinginre,asphyxiation,seriouspersonalinjuryordeath.
Do notapplyinsulationtothetopofthewaterheater,asthiswill
interferewithsafeoperationoftheblowerassembly.
Do notcovertheouterdoor,thermostatortemperature&pressure
relief valve.
Do notallowinsulationto comewithin2”(5.1 cm)oftheoor to
preventblockageofcombustionairowtotheburner.
Do notcover the instruction manual. Keep it onthe sideof the
water heater or nearby for future reference.
Doobtain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combustionairow.
COMBUSTION AIR AND VENTILATION
Agas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 “Facts to ConsiderAbout
Location”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 5.
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(s)beinstalleddirectventsothat
allairforcombustionandventilationistakenfromoutdoors.
Propellants of aerosol sprays and volatile compounds, (cleaners,
chlorinebasedchemicals,refrigerants,etc.)inadditiontobeinghighly
ammableinmanycases,willalsoreacttoformcorrosivehydrochloric
acidwhenexposedtothecombustionproductsofthewaterheater.
Theresultscanbehazardous,andalsocauseproductfailure.
APPLIANCES IN UNCONFINED SPACES
UNCONFINED SPACE is space whose volume is not less than
50cubicfeetper1,000Btuperhour(4.8cubicmetersperkW)ofthe
aggregateinputratingofallappliancesinstalledinthat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unconnedspace.
In unconned spaces in buildings, inltration may be adequate to
provide air for combustion, ventilation and dilution of ue gases.
However, in buildings of tight construction (for example, weather
stripping,heavilyinsulated,caulked,vaporbarrier,etc.),additionalair
mayneedtobeprovidedusingthemethodsdescribedin“Appliances
inConnedSpace”thatfollows.”
APPLIANCES IN CONFINED SPACES
CONFINED SPACEisaspacewhosevolumeislessthan50cubic
feetper1,000Btuperhour(4.8cmperkW)oftheaggregateinput
ratingofallappliancesinstalledinthatspace.
Whendrawingcombustionairfrominsideaconventionallyconstructed
buildingtoaconfinedspace,suchaspaceshallbeprovidedwith
twopermanentopenings.ONEWITHIN12INCHES(30cm)OF
THE ENCLOSURE TOP AND ONE WITHIN 12 INCHES (30
cm)OFTHEENCLOSUREBOTTOM.Eachopeningshallhave
12
afreeareaofonesquareinchper1000Btu/hr(22cm
2
/kW)ofthe
totalinputofallappliancesintheenclosure,butnotlessthan100
squareinches(645cm
2
).
Iftheconnedspaceiswithinabuildingoftightconstruction,airfor
combustionandventilationmustbeobtainedfromoutdoors.When
directlycommunicatingwiththeoutdoorsorcommunicatingthrough
verticalducts,twopermanentopenings,locatedintheabovemanner,
shallbeprovided. Eachopeningshallhaveafreeareaofnotless
thanonesquareinchper4000Btu/hr(5.5cm
2
/kW)oftotalinputofall
appliancesintheenclosure.Ifhorizontalductsareused,eachopening
shallhaveafreeareaofnotlessthanonesquareinchper2000Btu/
hr(11cm
2
/kW)ofthetotalinputofallappliancesintheenclosure.
A. ALL AIR FROM INSIDE BUILDINGS: (SeeFigure5and6)
The conned space shall be provided with two permanent openings
communicating 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.Thetotalinputofallgasutilizationequipmentinstalled
inthecombinedspaceshallbeconsideredinmakingthisdetermination.
Each opening shall have a minimum free area of one square inch
per 1,000 Btu per hour (22 cm
2
/kW) of the total input rating ofall gas
utilization
equipmentintheconnedspace,butnotlessthan100square
inches (645 cm
2
). One opening shall commence within 12 inches
(30cm)ofthetopandonecommencingwithin12inches(30cm)ofthe
bottomoftheenclosures.
FIGURE 6.
B. ALL AIR FROM OUTDOORS:(SeeFigures7,8and9)
Theconnedspaceshallbeprovidedwithtwopermanentopenings,
one commencing within 12 inches (30 cm) of the top and one
commencingwithin12inches(30cm)fromthebottomoftheenclosure.
Theopeningsshallcommunicatedirectly,orbyducts,withtheoutdoors
orspaces(crawlorattic)thatfreelycommunicatewiththeoutdoors.
1. Whendirectlyc ommunic atingwiththeoutdoors,eachopeningshallhave
aminimumfreeareaof1squareinchper4,000Btuperhour(5.5cm
2
/kW)
oftotalinputratingofallequipmentintheenclosure,seeFigure7.
FIGURE 7.
2. Whencommunicatingwiththeoutdoorsthroughverticalducts,each
openingshallhaveaminimumfreeareaof1squareinchper4,000
Btuperhour(5.5cm2/kW)oftotalinputratingofallequipmentinthe
enclosure,seeFigure8.
3. Whencommunicatingwiththeoutdoorsthroughhorizontalducts,each
openingshallhaveaminimumfreeareaof1squareinchper2,000
Btuperhour(11cm2/kW))oftotalinputratingofallequipmentinthe
enclosure,seeFigure9.
FIGURE 8.
4. Whenductsareused,theyshallbeofthesamecross-sectionalarea
asthefreeareaoftheopeningstowhichtheyconnect.Theminimum
shortsidedimensionofrectangularairductsshallnotbelessthan3
inches(7.6cm),seeFigure9.
FIGURE 9.
5. Alternatively a single permanent opening may be used when
communicatingdirectlywiththeoutdoors,orwithspacesthatfreely
communicatewiththeoutdoors.Theopeningshallhaveaminimum
freeareaof1squareinchper3,000BTUperhour(8.3cm2/kW)of
totalinputratingofallequipmentinenclosure.SeeFigure9A.
FIGURE 9.
6.LouversandGrilles:Incalculatingfreearea,considerationshallbegiven
to
theblockingeffectoflouvers,grillesorscreensprotectingopenings.Screens
usedshallnotbesmallerthan1/4inch(6.4mm)mesh.Ifthefreeareathrough
adesignoflouverorgrilleisknown,itshouldbeusedincalculatingthesize
openingrequiredtoprovidethefreeareaspecied.Ifthedesignandfreearea
isnotknown,itmaybeassumedthatwoodlouverswillbe20-25percentfree
areaandmetallouversandgrilleswillhave60-75percentfreearea.Louvers
andgrillesshallbexedintheopenpositionorinterlockedwiththeequipment
sothattheyareopenedautomaticallyduringequipmentoperation.
7.SpecialConditionsCreatedbyMechanicalExhaustingorFireplaces:
operationofexhaustfans,ventilation systems,clothesdryersor
replacesmaycreateconditionsrequiringspecialattentiontoavoid
unsatisfactoryoperationofinstalledgasutilizationequipment.
13
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ow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 should be installed
on all closed systems to control the harmful effects of thermal
expansion..
FIGURE 10.
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, see Figure 2 also.
CHEMICAL VAPOR CORROSION
CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY OCCUR IF
AIR FOR COMBUSTION CONTAINS CERTAIN CHEMICAL VAPORS. SUCH
CORROSION MAY RESULT IN FAILURE AND RISK OF ASPHYXIATION.
Spray can propellants, cleaning solvents, refrigerator and air
conditioning refrigerants, swimming pool chemicals, calcium and
sodiumchloride(watersoftenersalt),waxes,andprocesschemicals
aretypicalcompoundswhicharepotentiallycorrosive.
Donotstoreproductsofthissortneartheheater.Also,airwhichis
brought in contact with the heater should not contain any of these
chemicals.Ifnecessary,uncontaminatedairshouldbeobtainedfrom
remoteoroutsidesources.Thelimitedwarrantyisvoidedwhenfailure
ofwaterheaterisduetoacorrosiveatmosphere.(Seelimitedwarranty
forcompletetermsandconditions).
WATER PIPING
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,cleaning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
physicallyordevelopmentallydisabled.Ifanyoneusinghotwatertsinto
oneofthesegroupsorifthereisalocalcodeorstatelawrequiringa
certaintemperaturewateratthehotwatertap,thenyoumust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,
shallbeusedatthehotwatertapsusedbythesepeopleoratthewater
heater,seeFigure2.Valvesforreducingpointofusetemperatureby
mixingcoldandhotwaterarealsoavailable:
Consult a Qualied Installer or ServiceAgency. 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.
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temperingvalvemustbe
installed.PleaserefertoFigure2forsuggestedpipingarrangement.
INSTALLING THE NEW WATER HEATER
14
Figures2and10showthetypicalattachmentofthewaterpipingto
thewater heater.Thewaterheater is equipped with 3/4 inchNPT
water connections.
NOTE: If using copper tubing, solder tubing to an adapter
before attaching the adapter to the water heater connections.
Do not solder the water lines directly to the water heater
connections. It will harm the dip tube and damage the
tank.
T & P Valve and Pipe Insulation (if supplied)
Remove insulation for T & P valve and pipe connections from
carton.
FIGURE 11.
Fit pipe insulation over the incoming cold water line and the
hot waterline.Makesurethattheinsulationisagainstthetop
coveroftheheater.FitT&Pvalveinsulationovervalve.Make
sure that the insulation does not interfere with the lever of the
T & P valve.
Secureallinsulationusingtape.
TEMPERATURE-PRESSURE RELIEF VALVE
This heater is provided with a properly certified combination
temperature-pressurerelief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•CSA4.4,andthecoderequirements
of ASME.
Ifreplaced,thevalvemustmeettherequirementsoflocalcodes,but
notlessthanacombinationtemperatureandpressure relief valve
certiedasindicatedintheaboveparagraph.
The 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 input rate as shown on the water heaters
modelratingplate.
Forsafeoperationofthewaterheater,thereliefvalvemustnotbe
removedfromitsdesignatedopeningnorplugged.
Thetemperature-pressurereliefvalvemustbeinstalleddirectlyinto
thefittingofthewaterheaterdesignedforthereliefvalve.Position
thevalvedownwardandprovidetubingsothatanydischargewill
exitonlywithin6inches(15.2cm)above,oratanydistancebelow
thestructuralfloor.Becertainthatnocontactismadewithany
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, see
Figures10.
Novalveorotherobstructionistobeplacedbetweentherelief
valveandthetank.Donotconnecttubingdirectlytodischarge
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quantitiesshouldcircumstances
demand.Ifthedischargepipeisnotconnectedtoadrainorother
suitablemeans,thewaterflowmaycausepropertydamage.
TheDischargePipe:
•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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.
•Shallterminateatanadequatedrain.
•Shallnothaveanyvalvebetweenthereliefvalveandtank.
15
The temperature-pressure relief valve must be manually
operatedatleastonceayear,seeFigure28.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, and
replacethetemperature-pressurereliefvalvewithanewone.
GAS PIPING
Makesuregassuppliedissametypelistedonmodelratingplate.The
inletgaspressuremustnotexceed14inchwatercolumn(3.5kPa)
fornaturalandpropanegas(L.P.).Theminimuminletgaspressure
shownonratingplateisthatwhichwillpermitringatratedinput.
All gas piping must comply with local codes and ordinances or with the
National Fuel Gas Code (ANSIZ223.1/NFPA-54)orthe Natural
GasandPropaneInstallationCode(CAN/CSAB149.1)whichever
applies.Copperorbrasstubingandttings(excepttinlinedcopper
tubing)shallnotbeused.
Ifthegascontrolvalveissubjectedtopressuresexceeding1/2psi
(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/NFPA54)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dripleg(sedimenttrap)aheadofthegascontrolvalvetohelp
preventdirtandforeignmaterialsfromenteringthegascontrol
valve.
•Aflexiblegasconnectororagroundjointunionbetweenthe
shut off valve and control valve to permit servicing of the
unit.
Besuretocheckallthegaspipingforleaksbeforelightingthe
waterheater.Useasoapywatersolution,notamatchoropen
flame.Rinseoffsoapysolutionandwipedry.
HIGH ALTITUDE INSTALLATIONS
Ratedinputsaresuitableupto10,100feet(3,079m)elevation.Consult
thefactoryforinstallationataltitudesover10,100feet(3,079m).
WARNING:
THIS HIGH EFFICIENCY WATER HEATER IS CERTIFIED
FOR USE WITHOUT MODIFICATION FOR AN ALTITUDE OF 10,100
FEET(3,079METERS).INSTALLATIONSABOVETHESEALTITUDES
MAY REQUIRE REPLACEMENT OF BURNER ORIFICE. CALL THE
TECHNICALCENTERAT(800)527-1953FOR
REQUIREMENTS.
Some gas utility companies derate theirgas for altitude, making
itunnecessarytoinstallhighaltitudeorices.Callthelocalgasor
utilitycompanytoverifyBTUcontent.
Duetotheinputrationreductionathighaltitudes,theoutputrating
oftheapplianceisalsoreducedandshouldbecompensatedforin
thesizingoftheequipmentforapplications.
Usepipejointcompoundorteontapemarkedasbeingresistant
totheactionofpetroleum[Propane(L.P.)]gases.
Theapplianceanditsgasconnectionmustbeleaktestedbefore
placingtheapplianceinoperation.
TheapplianceanditsindividualShut-offvalveshallbe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).
IMPORTANT: MAKE SURE THE GAS LINE IS PIPED IN WITH
HARD PIPE. AVOID FLEX LINE CONSTRUCTION FOR GAS DUE
TO POSSIBLE GAS FLOW PROBLEMS.
16
SEDIMENT TRAPS
Asedimenttrapshallbeinstalledasclosetothegasinletofthewater
heateraspracticalatthetimeofwaterheaterinstallation.Thesediment
trapshallbeeitherateettingwithacappednippleinthebottomoutlet
orotherdevicerecognizedasaneffectivesedimenttrap.
Contaminantsinthegaslinesmaycauseimproperoperationofthe
gascontrolvalvethatmayresultinre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dripleg(sometimes
calledasedimenttrap)mustbeincorporatedinthepiping.Thedrip
leg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/NFPA54)ortheNaturalGasandPropane
InstallationCode(CAN/CSAB149.1).
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hotwaterfaucet.Allowwaterto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.
VENTING
VENT PIPE TERMINATION
Thefirststepistodeterminewheretheventpipewillterminate.
SeeFigures19,20,and21.Theventmayterminatethrougha
sidewallasshowninFigure19orthroughtheroofasshownin
Figures20and21.
The vent system must terminate so that proper clearances
ar e ma inta ine d as cite d in loc al codes or t he c urre nt
edition of the National Fuel Gas Code, (ANSI Z223.1, 12.9.1
through 12.9.4) or the Natural Gas and Propane Installation
Code(CAN/CSA-B149.1).
Instructionsonproperinstallationthroughasidewallareprovided
inFigures15A,15B,15C,and15D.
Plan the vent system layout so that proper clearances are
maintainedfromplumbingandwiring.
Vent pipes serving power vented appliances are classified by
buildingcodesasventconnectors”.Requiredclearancesfrom
combustible materials must be provided in accordance with
informationinthismanualunderFACTS TO CONSIDER ABOUT
LOCATION and INSTALLING THE WATER HEATER, and with
the National Fuel Gas Code and local codes.
17
FIGURE 15B.
U.S. POWER VENT
CANADIAN POWER VENT
WARNING
VENT HOOD(S) MAY BE
EXTREMELY HOT
DURING OPERATION.
WARNING
VENT HOOD(S) MAY BE
EXTREMELY HOT
DURING OPERATION.
FIGURE 15A.
CAUTION
TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULATING TO THE AIR INTAKE IN
WINDY/COLD AREAS, THE MAXIMUM PRACTICAL DISTANCE BETWEEN THESE TWO
TERMINALS IS RECOMMENDED.
18
FIGURE 15D.
U.S. DIRECT VENT
CANADIAN DIRECT VENT
WARNING
VENT HOOD(S) MAY BE
EXTREMELY HOT
DURING OPERATION.
WARNING
VENT HOOD(S) MAY BE
EXTREMELY HOT
DURING OPERATION.
FIGURE 15C.
CAUTION
TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULATING TO THE AIR INTAKE IN
WINDY/COLD AREAS, THE MAXIMUM PRACTICAL DISTANCE BETWEEN THESE TWO
TERMINALS IS RECOMMENDED.
19
PLANNING THE VENT SYSTEM
Plantherouteoftheventsystemfromtheexhaust elbow to the
plannedlocationoftheventterminal.
1. Layouttotalventsystemtouseaminimumofventpipeandelbows.
2. Thiswaterheateriscapableofventinguegasesequivalentto
25’(7.6m)of2”pipe,65’(19.8m)of3”pipe,or128’(39.0m)of
4”pipeaslistedinTable1.
TABLE 1
Number of 2” Maximum 3” Maximum 4” Maximum
90° Elbows Pipe - ft. (m) Pipe - ft. (m) Pipe - ft. (m)
1 20(6.1) 60(18.3) 120(36.6)
2 15(4.6) 55(16.8) 112(34.1)
3 10(3.0) 50(15.2) 104(31.7)
4 -- 45(13.7) 96(29.3)
5 -- 40(12.2) 88(26.8)
6 -- 35(10.7) 80(24.3)
Theminimumventlengthsforeachofthepipesizesisone90°plus
2’(61cm)ofstraightpipeandtheappropriatetermination.
NOTE:Theequivalentfeet(m)ofpipelistedaboveareexclusive
of the termination. That is, the termination, withan installed
screen,isassumedtobeinthesystemandtheremainderofthe
systemmustnotexceedthelengthsdiscussedabove.
3. Theexhaustelbowassemblyisdesignedtoacceptonlystraight
sectionsof2”pipe.Tostart,aminimumof2”(5.1cm)of2”pipe
mustbeinserted and glued to the exhaustelbow assembly if
utilizing3”or4”ventpipe.Usethesamemethodwiththeblower
inletifadirectventcongurationisutilized.
If using 2” inch vent pipe:
Aminimumof2”(5.1cm)diameterventpipemustbeattached
totheexhaustelbowassembly.Thetotalsystemcannotexceed
thelengths discussed above,whereeachelbow is equal to5
equivalentfeet(1.5m)ofstraightpipe.
If using 3” or 4” inch vent pipe:
Twoinches(5.1cm)of2”pipemustbeattachedtotheexhaust
elbowassemblybeforeaddingareducertoacquirethedesired
pipediameter.Anappropriatelysized45degreeelbow(supplied
locally-aschedule40DWV)ventterminalmustbeobtainedwith
anequivalentscreen(suppliedinventkit).Thetotalsystemcannot
exceedtheequivalentpipelengthsdiscussedabovewhereeach
elbowisequalto5feet(1.5m)ofstraightpipe(3”ventpipe)or8
feet(2.4m)ofstraightpipe(4”ventpipe).
U.S. INSTALLATIONS:
NOTE: ThisunitcanbeventedwithPVCpipematerials(CellularCore
ASTM-F891;DWVASTM-D2665orCSAB181.2;Schedule40,80,
120ASTM-D1785orCSAB137.3;orSDRSeriesASTM-D2241or
CSAB137.3),CPVCpipematerials(CPVC41ASTM-D2846orCSA
B137.6;Schedule40,80ASTM-F441orCSAB137.6;orSDRSeries
ASTM-F442),ABSpipematerials(Schedule40DWVASTM-D2661
orCSAB181.1orSchedule40DWVCellularCoreASTM-F628).The
ttings,otherthanthe TERMINATION should be equivalent to PVC-
DWVttingsmeetingASTMD-2665(UseCPVCttings,ASTMF-438
forCPVCpipeandABSttings,ASTMD-2661/3311forABSpipe).
IfCPVCorABSpipeandttingsareused,thenpropercementmust
beusedforalljoints,includingjoiningthepipetoTermination(PVC
Material).IflocalcodesdonotallowtheuseofthePVCtermination
whenamaterialotherthanPVCisusedforventing,thenanequivalent
ttingofthatmaterialmaybesubstitutedifthe screeninthePVC
terminalisremovedandinsertedintothenewtting.
Canadian Installation of this water heater must comply with CAN/
CSA B149.1 - Natural Gas and Propane Installation Code which
requires the vent system components be certied to ULC S636.
ThiswaterheaterhasbeendesigncertiedtobeventedwithPVC
pipecertiedandmarkedascomplyingwithULCS636.Thiswater
heaterissuppliedwitha2inch22.5degreeterminationelbowthatisa
specialttingthatmustbeusedwiththeappliance.Anyoutletpiping,
ttingsandglueusedtoventthisappliancethatisnotsuppliedbythe
manufacturermustcomplywiththeULCS636requirements.
PVCMaterialsshoulduseASTMD-2564GradeCement;CPVC
Materials should useASTM F-493 Grade Cement andABS
MaterialsshoulduseASTMD-2235GradeCement.
Ifthewaterheaterisbeinginstalledasareplacementforanexisting
powerventedheaterinpre-existingventing,athoroughinspection
ofexistingventingsystemmustbeperformedpriortoanyinstallation
work.Verifythatcorrectmaterialasdetailedabovehasbeenused,
andthattheminimumormaximumventlengthsandterminallocation
asdetailedinthismanualhavebeenmet.Carefullyinspecttheentire
ventingsystemforanysignsofcracksorfractures,particularlyat
jointsbetweenelbowsandotherttingsandstraightrunsofvent
pipe.Checksystemforsignsofsaggingorotherstressesinjointsas
aresultofmisalignmentofanycomponentsinthesystem.Ifanyof
theseconditionsarefound,theymustbecorrectedinaccordancewith
theventinginstructionsinthismanualbeforecompletinginstallation
andputtingthewaterheaterintoservice.
NOTE: A. For water heaters in locations with high ambient
temperatures(above 100°F)itis recommended thatCPVCor
ABSpipeandttingsbeused.B.A22.5degreeelbow(2”vent
pipe)ora45degreeelbow(3”and4”ventpipe)withaninstalled
screen VENT TERMINAL must be used in all cases.
4. Therewillbesomeinstallationswherecondensatewillbeformed
inthehorizontalrunsoftheventsystem. This condensate will
runintothecondensateelbow.Thewaterheaterisshippedwith
a condensate hose that attaches to the condensate elbow. No
otherteeorttingisrequired.
CONDENSATE
Thiswaterheaterisacondensingunitandrequiresadraintobelocatedin
closeproximitytoallowthecondensatetodrainsafely.Thecondensate
drainsfromtheunitattheexhaustteelocatedatthebottomoftheunit
(seegure16).Condensatefromthiswaterheaterismildlyacidic.
Pleasenotethatsomelocalcodesrequirethatcondensateistreated
byusingapHneutralizinglterpriortodisposal.
Cautionmustbeusedtoensurethatthedrainisfreeandclearofdebris
andwillnotallowbackowthroughthecondensatehose.Consideration
must be given to avoid freezing of the condensate lines which could
result in excessive build up of condensate inside the water heater.
Waterproof heat tape may be required to prevent freezing of the condensate
lines. Please ensure that the outlet of the condensate drain does
notcreateaslipperyconditionwhichcouldleadtopersonalinjury.
CONDENSATION WARNING: THIS WATER HEATER IS A CONDENSING
UNIT AND REQUIRES A DRAIN TO BE LOCATED IN CLOSE PROXIMITY
TO ALLOW CONDENSATE TO DRAIN SAFELY. THE CONDENSATE
DRAINS FROM UNIT AT THE EXHAUST ELBOW LOCATED AT
BOTTOM OF UNIT. NOTE: IT IS IMPORTANT THAT THE CONDENSATE
HOSE NOT BE ELEVATED ABOVE THE EXHAUST ELBOW, SEE
FIGURE 16. CONDENSATE BUILD-UP WILL BLOCK THE EXHAUST
OUTLET, WHICH WILL CAUSE IMPROPER OPERATION.
FIGURE 16.
20
INSTALLATION OF VENT SYSTEM
Beforebeginninginstallationofpipingsystemthoroughlyread
thesectionofthismanualVENTPIPEPREPARATION.
If you are installing your system so that it vents through roof,
please refer to section titled INSTALLATION OF VERTICAL
VENT SYSTEM.
VENT TERMINAL INSTALLATION, SIDEWALL
1. Installtheventterminalbyusingthecoverplateasatemplate
tomarktheholefortheventpipetopassthroughthewall.
BEWARE OF CONCEALED WIRING AND PIPING INSIDE
THE WALL.
2. If the Vent Terminal is being installed on the outside of a
finishedwall, itmaybeeasier tomark boththeinsideand
outsidewall.Aligntheholesbydrillingaholethroughthe
centerofthetemplatefromtheinsidethroughtotheoutside.
Thetemplatecannowbepositionedontheoutsidewallusing
thedrilledholeasacenteringpointforthetemplate.
3. A)MASONRYSIDEWALLS
Chiselanopeningapproximatelyonehalfinch(1.3cm)larger
thanthemarkedcircle.
B)WOODENSIDEWALLS
Drillapilotholeapproximatelyonequarterinch(0.64cm)outside
ofthemarkedcircle.Thispilotholeisusedasastartingpoint
for a saws-all or sabre saw blade. Cut around the marked
circlestayingapproximatelyonequarterinch(0.64cm)outside
ofthe line. (This will allowthe ventto easilyslide through
the opening. The resulting gap will be covered up by the
VentTerminalcoverplate.)Repeatthissteponinsidewallif
necessary.
SEQUENCE OF INSTALLATIONS, FIGURE 18A
CutalengthofPVCpipeabout3.5inches(8.9cm)longerthanthe
wall thickness at the opening. Glue the vent terminal to this
sectionofpipe.Slidethewallplateoverthepipetostopagainst
theventterminal.Placeabeadofcaulking(notsupplied)around
thegap between the pipe andcover plate.Apply enough to
fillsomeofthegapbetweenthepipeandwall.Placesomeof
thecaulkingonthebackoftheplatetoholditagainstthewall
afterinstallation.Iftheventpipeisinstalleduptothewall,with
acouplingontheendagainstthewallopening,thepipewith
thevent terminal can be prepared for gluingbefore inserting
through the wall. Slide the pipe through the wall and insert
intothecouplingontheothersideofthewall,makingsurethat
theventterminal endsup pointedin the correctposition,see
Figure18A.
VENT TERMINATION - FIGURE 18A.
DIRECT VENTING
Theairintakeprovidedontheunitcontainsameshscreentoprevent
largeparticlesfromenteringtheunit.
FIGURE 18B.
WHEN THE UNIT IS TO BE SETUP AS A DIRECT VENT, THE
MESH SCREEN MUST BE REMOVED. THE INLET VENT PIPE
MAYTHENBEGLUEDTOTHEAIRINTAKE(SeeFigure18B)
PROVIDED ON THE UNIT. THE SCREEN REMOVED FROM THE
INTAKENEEDSTOBEINSERTEDINTOTHE2”-22.5DEGREE
VENT TERMINAL SUPPLIED IN THE VENT TERMINAL KIT.
DIRECT VENT TERMINAL INSTALLATION IMPORTANT
THIS UNIT CONSISTS OF TWO VENT TERMINALS - AN INTAKE
VENT TERMINAL AND AN EXHAUST VENT TERMINAL. THE INTAKE
VENTTERMINALISA2”22.5°PVCELBOW(-)WITHAMESHWIRE
SCREENANDTHEEXHAUSTVENTTERMINALISA2”22.5°PVC
ELBOW WITH A MESH WIRE SCREEN.
NOTE: TO PREVENT EXHAUSTING PRODUCTS FROM
CIRCULATING TOTHEAIR INTAKE IN WINDY/COLDAREAS,
THE MAXIMUM PRACTICAL DISTANCE BETWEEN THESE TWO
TERMINALS IS RECOMMENDED.
FIGURE 18C.
WHEN LOCATING THE TERMINALS ON A SIDEWALL, THE
FOLLOWING SPECIFICATIONS PERTAINING TO TERMINAL
LOCATION MUST BE FOLLOWED.
1.Theintakeairterminalandtheexhaustventterminalmustterminate
onthesameexteriorwallandmustbeseparatedbyaminimumof
24”(61cm)onverticalcenterline(seeFigure18C).Incolderclimates
increasing the 24” (61cm) minimum will reduce possibility offrost
overfromsidewindsblowingexhaustvaporstotheairintakeofthe
direct vent.
2.Thehorizontalcenterlineoftheintakeairterminalmaynotbelocated
lowerthanthehorizontalcenterlineoftheexhaustventterminal(see
Figure18C).
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A.O. Smith 197835-001 User manual

Category
Water heaters & boilers
Type
User manual
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