A.O. Smith BTF-75 User manual

1
PRINTED IN U.S.A. 0901 PART NO. 194643-000
ThankyouforbuyingthisenergyefficientwaterheaterfromA.O.Smith
Water Products Company. We appreciate your confidence in our
products.
CAUTION
TEXT PRINTED OR OUTLINED IN RED CONTAINS
INFORMATIONRELATIVETOYOURSAFETY.PLEASEREAD
THOROUGHLYBEFOREINSTALLINGANDUSINGTHIS
APPLIANCE.
ADIVISION OFA.O.SMITH CORPORATION
McBee, South Carolina U.S.A.
Stratford, Ontario Canada
www.hotwater.com
KEEP THIS MANUAL IN THE POCKET ON THE HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
® SmartValve is a Registered Trademark of Honeywell Inc.
MODEL BTF-75 with Hot Surface Ignition & SmartValve®
COMMERCIAL GAS, GLASS-LINED, TANK-TYPE WATER HEATER
•SAFETY • INSTALLATION •OPERATION •MAINTENANCE •LIMITED WARRANTY

2
ROUGH-IN-DIMENSIONS
FOREWORD
The design of model BTF-75 complies with the latest version of
ANSIZ21.10.3/CSA4.3M98asautomaticstorage orautomaticcirculating
tank type water heaters.
Installationdiagramsarefoundinthismanual. Thesediagramswillserve
toprovidetheinstallerwith a reference for the materials andmethodof
pipingnecessary. Itishighly essential that allwater and gas pipingbe
installedasshownon the diagrams.
In addition to these instructions, the equipment shall be installed in
accordancewiththose installation regulations in forceinthe local area
wherethe installation is tobemade. These shall be carefullyfollowed
inallcases. Authorities having jurisdiction should beconsultedbefore
installationsare made.
Theinstallation must conformto these instructionsand the local code
authorityhavingjurisdiction. Intheabsenceoflocalcodes,theinstallation
must comply with the latest editions of the National Fuel Gas Code,
ANSIZ223.1/NFPA 54. TheNFPA. Thisis availablefromtheCanadian
StandardsAssociation, 8501EastPleasantValleyRoad,Cleveland,OH
44131,or the NationalFireProtection Association,1BatterymarchPark,
Quincy, MA 02269.
FIGURE1
*INSTALLINACCORDANCEWITHLOCALCODES
TOPVIEW
ALL DIMENSIONS IN INCHES
Model Units A B C D E F G H J K L M
BTF-75 Inches 66 5/16 58 1/2 29 5/8 25 3/8 15 3/16 4 14 16 1 1/4 1 1/2 11 15/16
cm 168.4 148.6 75.2 64.5 38.6 10.2 35.6 40.6 3.2 NPT NPT 30.3
RECOVERYCAPACITIES
Input Approx. Approx. Temp. °C 17 22 28 33 39 44 50 56 61 67 72 78
Model Rating Rating Gal. Liter
Btu/Hr KW/Hr Cap. Cap. Rise ° F 30 40 50 60 70 80 90 100 110 120 130 140
BTF-75 80,000 23.4 74 284 LPH 979 734 587 489 419 367 326 294 267 245 226 210
GPH 259 194 155 129 111 97 86 78 71 65 60 55
Recovery capacity based on 80% thermal efficiency.

3
GENERAL SAFETY INFORMATION
PRECAUTIONS
DONOTUSETHISAPPLIANCEIFANYPARTHASBEENUNDERWATER.
Immediatelycallaqualified service technician to inspect theappliance
andtoreplaceanypartofthecontrolsystemandanygascontrolwhich
has been under water.
IFTHEUNITISEXPOSEDTOTHEFOLLOWING,DONOTOPERATEHEATER
UNTILALLCORRECTIVESTEPSHAVEBEENMADEBYAQUALIFIED
SERVICEMAN.
1. EXTERNALFIRE.
2. DAMAGE.
3. FIRINGWITHOUTWATER.
4. SOOTING.
CHEMICAL VAPOR CORROSION
WARNING
CORROSIONOFTHEFLUEWAYSANDVENTSYSTEMMAYOCCUR IF
AIRFORCOMBUSTIONCONTAINSCERTAINCHEMICALVAPORS. SUCH
CORROSIONMAYRESULTINFAILUREANDRISKOFASPHYXIATION.
Spraycanpropellants,cleaningsolvents,refrigeratorand airconditioning
refrigerants, swimming pool chemicals, calcium and sodium chloride
(water softener salt), waxes, and process chemicals are typical
compoundswhicharepotentially 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. Ifnecessary, uncontaminated airshould be obtainedfrom
remoteoroutside sources. The limited warrantyisvoidedwhen failure
ofwater heater is dueto a corrosive atmosphere. (Refer tothe limited
warrantyforcomplete terms and conditions).
IMPROPER COMBUSTION
WARNING
ATTICAND/OREXHAUSTFANSOPERATINGONTHEPREMISESWITHA
WATERHEATERCANRESULTINCARBONMONOXIDEPOISONINGAND
DEATH.
OPERATIONOFTHESEFANSCANPRODUCEANEGATIVEDRAFTIN
THEAREAOFTHEWATERHEATERPREVENTINGTHEPRODUCTSOF
COMBUSTIONFROMEXHAUSTINGTHROUGHTHEVENTPIPE.
Theventingofthewaterheatershouldbeinspectedbyaqualifiedservice
technicianatthe time of installationandperiodicallythereaftertoensure
adown-draft condition doesnot exist.
DONOTOBSTRUCTTHEFLOWOFCOMBUSTIONANDVENTILATING
AIR. ADEQUATEAIRFORCOMBUSTIONANDVENTILATIONMUSTBE
PROVIDEDFORSAFEOPERATION.
LIQUID PETROLEUM MODELS
WARNING
Waterheaters forpropaneorliquefied petroleum gas(LPG)aredifferent
from natural gas models. A natural gas heater will not function safely
on LP gas and no attempt should be made to convert a heater from
naturalgastoLPgas.
LPgasmustbeusedwithgreat caution. Itishighlyexplosiveandheavier
thanair. It collects first inthelowareasmakingitsodordifficultto detect
atnoselevel. IfLPgas is present or even suspected, do notattemptto
find the cause yourself. Go to a neighbor's house, leaving your doors
opentoventilate the house, thencallyourgassupplierorservice agent.
Keepareaclearuntila service call has been made.
Attimes youmaynotbeable tosmellanLP gasleak. Onecauseis odor
fade, which is a loss of the chemical odorant that gives LP gas its
distinctivesmell. Another cause canbe your physicalcondition, such
as having a cold or a diminishing sense of smell with age. For these
reasons,theuse of a propane gasdetector is recommended.
TABLE OF CONTENTS
ROUGH-INDIMENSIONS ..............................................................2
FOREWORD ...............................................................................2
GENERALSAFETYINFORMATION
Precautions ............................................................................3
ChemicalVaporCorrosion ......................................................3
ImproperCombustion ..............................................................3
LiquidPetroleumModels........................................................ 3-4
ExtendedNon-Use periods .....................................................4
InsulationBlankets ..................................................................4
CirculatingPump .....................................................................4
DishwashingMachine Requirements ......................................4
INSTALLATION
RequiredAbility ......................................................................4
General ..................................................................................4
Grounding ..............................................................................4
HighAltitudeInstallation ..........................................................4
LocationOfHeater ............................................................... 4-5
AirRequirements ....................................................................5
UnconfinedSpace ..................................................................5
ConfinedSpace ......................................................................5
WaterConnections .................................................................5
Water(Potable)Heating&SpaceHeating ............................. 5-6
ClosedWaterSystem .............................................................6
ReliefValve ............................................................................6
Venting...................................................................................6
VentPipeTermination ............................................................ 6-7
PlanningTheVentSystem .................................................... 7-8
InstallationOfSidewallVentSystem .......................................7
VentTerminalInstallation,Sidewall ..........................................7
PreparationOfBlowerAssembly ......................................... 8-9
InstallationOfVentSystem, Sidewall .....................................10
InstallationOfVertical VentSystem .......................................10
VentPipePreparation ......................................................... 10-12
GasConnections ...................................................................12
ConnectionofGas Pipe .........................................................12
OPERATION
ToOperateHeater .................................................................12
Lighting& OperatingLabel .....................................................13
Purging ..................................................................................14
TemperatureRegulation .........................................................14
MAINTENANCE
MainBurner ...........................................................................14
HighTemperatureCut-OffSwitch ..........................................15
VentingSystem .....................................................................15
PowerVenter Maintenance ...................................................15
T&PValve............................................................................15
Draining.................................................................................15
MainBurnerAnd Igniter ...................................................... 15-16
Condensation ........................................................................16
CathodicProtection- Anode ..................................................16
Service&Repair ...................................................................16
TROUBLESHOOTING ............................................................. 16-19
LIMITEDWARRANTY .................................................................20
PAGE PAGE

4
IFYOUEXPERIENCEANOUT-OF-GASSITUATION,DONOTTRYTO
RELIGHTAPPLIANCESYOURSELF. AskyourLPdeliverypersontorelight
pilotsfor you. OnlytrainedLPprofessionals shouldconducttherequired
safety checks in accordance with industry standards.
EXTENDED NON-USE PERIODS
WARNING
HYDROGENGASCANBEPRODUCED IN A HOT WATER SYSTEM
SERVEDBYTHISHEATERTHATHASNOTBEENUSEDFORALONG
PERIODOFTIME(GENERALLYTWOWEEKSORMORE). HYDROGEN
GASISEXTREMELYFLAMMABLE. Toreducetheriskofinjuryunder
theseconditions,it isrecommendedthatthehot waterfaucetbeopened
for several minutes at the kitchen sink before using any electrical
appliance connected to the hot water system. If hydrogen is present,
therewill probably bean unusual soundsuch as airescaping through
thepipeasthewaterbeginstoflow. THERESHOULDBENOSMOKING
OROPENFLAMENEARTHEFAUCETATTHETIMEITISOPEN.
INSULATION BLANKETS
Insulation blankets available to the general public for external use on
gas water heaters are not necessary with A.O. Smith products. The
purpose of an insulation blanket is to reduce the standby heat loss
encounteredwith storage tank heaters. Your A.O.Smith water heater
meets and exceeds the National Appliance Energy Conservation Act
standards with respect to insulation and standby loss requirements,
makinganinsulation blanketunnecessary.
WARNING
Should you choose to apply an insulation blanket to this heater, you
should follow these instructions. Failure to follow these instructions
can restrict the air flow required for proper combustion, potentially
resultinginfire,asphyxiation, serious personal injury or death.
•Do not cover the gas valveor temperature & pressure relief valve.
•Donotallowinsulationtocomewithin2"oftheairinlet box,toprevent
blockageofthedilutionair.
•Do not allow insulation to come within 2" of the floor to prevent
blockageof combustion air flowtothe burner.
•Donotcovertheinstructionmanual. Keepitonthesideof the water
heater or nearby for future reference.
•Do obtain new warning and instruction labels from A.O. Smith for
placementontheblanketdirectlyovertheexistinglabels.
•Doinspectthe insulation blanket frequentlyto make certain itdoes
notsag, thereby obstructing combustionairflow.
CIRCULATING PUMP
Acirculatingpumpisusedwhenasystemrequiresacirculatingloopor
thereisastoragetankusedinconjunctionwiththeheater. Refertothe
pipingdiagramsatrearofmanualforelectricalhookupinformationand
installinaccordance with thelatestversionoftheNationalElectricCode
ANSI/NFPANo.70.
Onlyall bronze circulators are usedwith commercial water heaters.
Althoughcirculatorsare oiled and operated by themanufacturersome
circulators must be oiled again before operating. Please refer to
manufacturer’sinstructions.
DISHWASHING MACHINE REQUIREMENT
TheseappliancesmeettheNational SanitationFoundationStandardfor
sanitary installations when used with the following leg kits, Part No’s.
6570-0and6570-7.
Alldishwashingmachinesmeeting the National Sanitation Foundation
requirements are designed to operate with water flow pressures
between15 and 25 psi (103Kpaand173 Kpa). Flow pressures above
25 psi (173Kpa), or below 15 psi (103 Kpa), will result in improperly
sanitizeddishes. Wherepressuresare high, a water pressure reducing
or flow regulating control valve should be used in 1800F line to the
dishwashingmachine,and should be adjustedtodeliverwaterbetween
theselimits.
TheNationalSanitationFoundationalsorecommendscirculationof1800F
(82°C)water. Where this is done,thecirculation should be very gentle
sothat it does notcauseany unnecessary turbulence insidethe water
heater. Thecirculationshouldbe just enough toprovide 1800F(82°C)
water at the point of take-off to the dishwashing machine. Adjust flow
bymeansofthe plug cock in the circulating line.
INSTALLATION
REQUIRED ABILITY
INSTALLATIONORSERVICEOFTHISWATERHEATERREQUIRESABILITY
EQUIVALENTTOTHATOFALICENSEDTRADESMANINTHEFIELD
INVOLVED. PLUMBING,ELECTRICALAIRSUPPLY,VENTINGANDGAS
SUPPLYAREREQUIRED.
GENERAL
The heater is designed to operate on natural or propane gases.
HOWEVER,MAKE SUREthegasonwhichtheheaterwilloperateis the
same as that specified on the heater model and rating plate. The
installationmustconformtotheseinstructionsandthelocalcodeauthority
havingjurisdiction. Intheabsenceoflocal codes, conform to the latest
editionofNationalFuelGasCodeANSIZ223.1/NFPA54andtheNational
Electric Code, NFPA 70. The former is available from the Canadian
StandardsAssociation, 8501EastPleasantValleyRoad,Cleveland,OH
44131,andbothdocumentsareavailablefromtheNationalFireProtection
Association,1BatterymarchPark,Quincy,MA02269.
GROUNDING
Thewaterheater, wheninstalled,mustbegroundedinaccordancewith
local codes, or in the absence of local codes: The National Electric
Code,ANSI/NFPA70;
HIGH ALTITUDE INSTALLATION
CAUTION
INSTALLATIONSABOVE2000FT.REQUIREREPLACEMENTOFTHE
BURNERORIFICEINACCORDANCEWITHTHENATIONALFUELGAS
CODE(ANSIZ223.1/NFPA54). FAILURETOREPLACETHEORIFICE
COULDRESULTINIMPROPERANDINEFFICIENTOPERATIONOFTHE
APPLIANCE,PRODUCINGCARBON MONOXIDEGASINEXCESSOFSAFE
LIMITS,WHICHCOULDRESULTINSERIOUSPERSONALINJURYOR
DEATH. CONTACTYOURGASSUPPLIERFORANYSPECIFICCHANGES
WHICHMAYBEREQUIREDINYOURAREA.
A.O.SMITHBUILDSSOMEMODELSSPECIFICALLYFORHIGHALTITUDE
SERVICE.
PLEASECHECKTHERATINGPLATEBEFOREMAKINGCHANGES.
LOCATION OF HEATER
Wheninstallingtheheater,considerationmustbegiventoproperlocation.
Location selected should be as close to the wall as practicable with
adequateairsupplyandascentralizedwith the water piping system as
possible.

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Theheaterisdesign certified by theCanadianStandardsforinstallation
on combustible flooring in a closet having minimum clearances from
combustible material of: 2" clearance from sides and rear, 6" from the
frontand 24" from the top. (Standardclearance.) If clearances stated
on the heater differ from standard clearances, install water heater
accordingtoclearances stated on heater.
Aminimum clearance of 4"must be allowed foraccess to replaceable
parts such as the thermostats, drain valve and relief valve. A top
clearance of 24" should be allowed for blower assembly service.
Adequateclearance for servicing this applianceshould be considered
before installation, such as changing the anodes, etc. Minimum
clearancesfor proper operation are givenabove.
WARNING
Incoldclimatesprovideprotectionagainstfreeze-up.
THEHEATERSHOULDBELOCATEDINANAREAWHERELEAKAGEOF
THETANKORCONNECTIONSWILLNOTRESULTINDAMAGETOTHE
AREAADJACENTTOTHEHEATERORTOLOWERFLOORSOFTHE
STRUCTURE. Whensuch locationscannotbeavoided, asuitabledrain
panshould be installed underthe heater, see fig. 1. Thepan must not
restrictcombustionairflow. Suchpansshould have a minimum length
and width of at least 2 inches greater than the diameter of the heater
andshouldbe pipedtoanadequatedrain. Drainpans suitableforthese
heaters are available from your dealer or A. O. Smith Water Products
Company, 5621 W.115th Street,Alsip,Illinois60803.
WARNING
DONOTINSTALLTHISWATERHEATERDIRECTLYONACARPETED
FLOOR. AFIREHAZARDMAYRESULT. Insteadthewater heatermust
beplacedona metal or woodpanelextendingbeyondthefullwidthand
depth by at least 3 inches (76.2mm) in any direction. If the heater is
installedinacarpetedalcoveorcloset,theentirefloorshallbecovered
bythepanel.
AIR REQUIREMENTS
In calculating the free area of a vent opening, the blocking effect of
screens,louversandgrillsshould be considered. Screens shall not be
of a mesh smaller than 1/4 inch square. If the free area is not known,
thelatesteditionofNationalFuelGasCodeANSI Z223.1 recommends
using figures of 20-25 percent free area for wood louvers or 60-75
percentformetal grills or louvers.
UNCONFINED SPACE
Inbuildingsofconventionalframe,brickorstoneconstruction,unconfined
spacesmayprovideadequateairforcombustion,ventilation,anddilution
air for power venter.
Iftheunconfinedspace is within a buildingoftightconstruction(building
using the following construction: weather stripping, heavy insulation,
caulking,vaporbarrier,etc.),airforcombustion,ventilation,and venter
dilutionmustbe obtainedfromoutdoors. Theinstallationinstructions for
confinedspaces must be followed.
CONFINED SPACE
Whendrawingcombustionanddilutionairfrominsideaconventionally
constructedbuilding toaconfinedspace, suchaspaceshall beprovided
with two permanent openings. ONE WITHIN 12 INCHES OF THE
ENCLOSURETOPANDONEWITHIN12INCHESOFTHEENCLOSURE
BOTTOM. Eachopening shall have a freeareaofonesquare inch per
1000 Btuh of the total input of all appliances in the enclosure, but not
lessthan100 square inches.
If the confined space is within a building of tight construction, air for
combustion,ventilationand powerventerdilutionmust beobtainedfrom
outdoors. When directly communicating with the outdoors or
communicatingthrough verticalducts,twopermanent openings,located
intheabovemanner,shall be provided. Eachopeningshallhaveafree
areaofnotlessthan one square inch per 4000 Btuh ofthetotalinputof
allappliancesintheenclosure. Ifhorizontalductsareused,eachopening
shallhaveafreeareaofnotlessthanonesquareinchper2000Btuhof
thetotalinputofallappliancesintheenclosure.
WATER CONNECTIONS
Refertofigure12 for typical installation. A suitable pipe threadsealant
mustbeusedtopreventleakage.
WATER (POTABLE) HEATING AND SPACE
HEATING
1. All piping components connected to this unit for space heating
applicationsshall be suitable forusewith potable water.
2. Toxicchemicals,suchasthoseusedforboilertreatment,shallNEVER
beintroducedintothissystem.
3. Thisunitmay NEVERbeconnected toanyexisting heatingsystemor
component(s) previously used with a non-potable water heating
appliance.
4. Whenthesystem requires water for space heatingattemperatures
higherthanrequired for domesticwaterpurposes,atempering valve
must be installed. Please refer to Fig. 2 for suggested piping
arrangement.

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CLOSED WATER SYSTEM
A closed system will exist if a back-flow preventer (check valve),
pressurereducing valve, orother similar device isinstalled in thecold
water line between the water heater and the street main (or well).
Excessivepressuremaydevelopduetothethermalexpansionofheated
watercausingprematuretankfailureorintermittentreliefvalveoperation.
Thistypeof failure is not coveredbythelimitedwarranty. An expansion
tankmay benecessaryinthecold watersupplytoalleviate thissituation.
Contactthelocal plumbingauthority.
Ifthetemperature and pressurereliefvalveonthe appliance discharges
periodically, this may be due to thermal expansion in a closed water
supplysystem. Contactthe water supplier orlocalplumbing inspector
onhowto correctsituation. DONOTPLUGTHE TEMPERATUREAND
PRESSURERELIEFVALVE.
RELIEF VALVE
ANEWTEMPERATUREANDPRESSURERELIEFVALVECOMPLYINGWITH
THESTANDARDFORRELIEFVALVESANDAUTOMATICGASSHUTOFF
DEVICESFORHOTWATERSUPPLYSYSTEMS,ANSIZ21.22(LATEST
EDITION)MUSTBEINSTALLEDINTHEHEATERINTHEMARKEDOPENING
PROVIDED. THEVALVEMUSTBEOFASIZE(INPUT RATING)THAT
WILLBEADEQUATEFORYOURSIZEHEATER.
Check the metal tag on the relief valve and compare it to the heater’s
rating plate. The pressure rating of relief valve must not exceed the
working pressure shown on the rating plate of the heater. In addition
thehourlyBturatedtemperature steam discharge capacity of the relief
valveshallnotbelessthanthe input rating of the heater. NOVALVE IS
TOBEPLACEDBETWEENTHERELIEFVALVEANDTANK. DONOTPLUG
THERELIEFVALVE.
Thedrainlineconnectedtothisvalvemustnotcontainareducingcoupling
orother restriction and must terminatenear a suitable drain toprevent
waterdamageduringvalveoperation. Thedischargelineshallbeinstalled
in amanner toallow completedrainage of boththe valveand line. DO
NOTTHREAD,PLUGORCAPTHEENDOFTHEDRAINLINE.
VENTING
WARNING
THEINSTRUCTIONSINTHISSECTIONONVENTINGMUSTBEFOLLOWED
TOAVOIDCHOKEDCOMBUSTIONORRECIRCULATIONOFFLUEGASES.
SUCH CONDITIONS CAUSE SOOTING OR RISKS OF FIRE AND
ASPHYXIATION.NEVEROPERATETHEHEATERUNLESSITISVENTED
TOTHEOUTDOORSANDHASADEQUATEAIRSUPPLYTOAVOIDRISKS
OFIMPROPEROPERATION,FIRE,EXPLOSIONORASPHYXIATION.
VENT PIPE TERMINATION
The first step is to determine where the vent pipe will terminate. The
ventmayterminate through the roof(seeFigure9)orthrough a sidewall
(seeFigure8).
IMPORTANT
Theventsystemmustterminatesothatproperclearancesaremaintained
ascited inlocalcodesorthelatestedition oftheNationalFuelGasCode,
ANSIZ223.1,7.3.4eand 7.8a, b.
For your convenience instructions on proper installation through a
sidewallareprovidein Figure 3 and the numberedpointsbelow:
1. Theexitterminalsofa mechanical ventsystemshallbenot less than
7 feet above grade when located adjacent to public walkways.
2. Aventingsystemshallterminateat least 3 feet above any forced air
inletlocatedwithin 10 feet.
3. The venting system shall terminate at least 4 feet below, 4 feet
horizontally from or, 1 foot above any door, window or gravity air
inlet intoanybuilding.
4. Themanufactureralsorecommendsthattheventsystemtermination
notbeinstalledcloserthan3feet fromaninsidecornerofanLshaped
structure and not be less than 1 foot above grade. The vent shall
terminatea minimumof12''aboveexpected snowfallleveltoprevent
blockageofvent termination.
CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACK-FLOW
PREVENTER, CHECK VALVE OR WATER METER WITH CHECK VALVE,
PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER
SYSTEM MUST BE PROVIDED.
FIGURE2
CIRCULATING RETURN LINE CONNECTIONS
TEMPERED WATER LOOP, IF USED, CONNECT TO POINT "A". STORED
TEMPERATURE WATER LOOP, IF USED, CONNECT TO COLD WATER INLET
WARNING
TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE
TEMPERATUREAT FIXTURES. SEE TEMPERATUREREGULATION
ON PAGE 9. IF HIGHER PREHEAT TEMPERATURES ARE
NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT,ADDAN
ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.
SINGLETEMPERATURE MIXING VALVE APPLICATION FOR TWO TEMPERATURE WATER

7
5. Theventterminationshallnotbemounteddirectly above or within 3
feethorizontallyfromanoiltankventorgasmetertoavoidpotential
freeze-upfromcondensation.
Planthe vent systemlayout so that properclearances are maintained
fromplumbingandwiring.
Ventpipes serving power ventedappliances are classified bybuilding
codes as "vent connectors". Required clearances from combustible
materialsmust beprovidedin accordancewithinformation inthismanual
underLOCATIONOFHEATERandVENTTERMINALINSTALLATIONS,
andwiththeNationalFuelGasCodeand local codes.
PLANNING THE VENT SYSTEM
Plan the route of the vent system from the discharge of the blower to
theplannedlocationofthevent terminal.
1. Layoutthetotalventsystemtouseaminimumofventpipeandelbows.
Takeintoconsiderationthatanelbowwill be necessary to make the
firstvent pipe connection tothe power venter outlet(see Figure 6).
2. Thiswaterheateriscapableofventingthefluegasestheequivalent
ofthirty (30) feet of3 inch pipe oreighty-five(85) feet of 4inch pipe
aslistedinTable1.
Number of 3" Maximum 4" Maximum
90° Elbows Pipe (Feet) Pipe Feet
ONE(1) 25 80
TWO(2) 20 75
THREE(3) 15 70
FOUR(4) 10 65
FIVE(5) - - - 60
TABLE1
NOTE: Theequivalentfeetofpipelistedabove are exclusive of the
"Tee"termination. That is,thefirstelbowand the termination "Tee",
with installed screens, are assumed to be in the system and the
remainderof the system mustnot exceed the thirty(30) equivalent
feet of 3 inch pipe or eighty five (85) equivalent feet of 4 inch pipe.
3. Theblowerdischargeadapterismadetoacceptonlystraightsections
of3" pipe. To start a minimum of 2 inches of 3" pipe must be glued
intothe blower discharge (Seefigure 6).
If using 3 inch vent pipe:
Aminimumof2inches,maximumof4feetof3"pipemustbeattached
tothe blower before thefirst 3-inch elbow. After the first elbowadd
theadditionalventingrequired for the installation. The total system
cannot exceed 30 equivalent feet of venting, where each elbow is
equalto 5 feet ofstraightpipe.
If using 4 inch vent pipe:
Two inches of3" pipe must beattached to theblower discharge. A
4"x3" reducerisaddedand thenuptomaximum4 feetof4inchpipe
added before the first elbow. An additional 4" x 3" reducer and (1)
foot of 3" pipe must be added to the end of the vent system before
terminating into the 3" tee. The total system cannot exceed 85
equivalentfeet of 4" venting, whereeach elbow is equal to5 feet of
straightpipe.
NOTE: This unit can be vented using only PVC (Class 160,
ASTMD-2241;Schedule40,ASTM D-1785; or Cellular Core Schedule
40DWV,ASTMF-891),Schedule40CPVC/ASTMF-441),orABS/ASTM
D-2661)pipe. The fittings,otherthantheTERMINATIONTEEshouldbe
equivalenttoPVC-DWVfittingsmeetingASTMD-2665(UseCPVCfittings,
ASTMF-438 for CPVC pipe and ABS fittings. ASTMD-2661/3311 for
ABS pipe. If CPVC or ABS pipe and fittings are used, then the proper
cement must be used for all joints, including joining the pipe to the
TerminationTee(PVCMaterial).
FIGURE4
FIGURE3
WARNING
VENTHOOD(S)MAYBE
EXTREMELYHOT
DURINGOPERATION.

8
PVCMaterialsshoulduseASTMD-2564GradeCement;CPVCMaterials
shoulduseASTMF-493GradeCementandABSMaterialsshoulduse
ASTMD-2235GradeCement.
NOTE:1. Forwaterheaters inlocationswithhighambient temperatures
(above100°F)and/orinsufficientdilutionair,itisrecommendedthatCPVC
orABSpipeand fittings be used. 2. TheSUPPLIEDVENTTERMINAL
mustbe used in all cases.
4. Thetemperatureofthefluegasesleavingtheblowerisabout160°F
after mixing the dilution air in the inlet adapter of the blower. Even
withhighconcentrateofroomairtakenintotheventsystemfordilution
air, there will be someinstallationswherecondensatewillbeformed
in the horizontal runs of the vent system. This condensate MUST
NOT beallowedtodrain back into the fan unit.
One method to catch the condensate before it can run back to the
fanistoinstalla"TEE"mountedupsidedownand capped, just past
thefirst elbow,(Fig.9)oftheventpipesystem. Thisset-upwill require
theinstallationof a small (1/4-3/8 inch)plastictube, with the proper
trap,to drain the condensate toafloor drain.
Asecond method toprevent the condensate from draining back to
thefanunitwould be to install the vent systemwithaslight,1/8inch
perfive foot of pipe maximum, downward slope(max. of 5/8 inch).
INSTALLATION OF SIDEWALL VENT SYSTEM
Beforebeginninginstallationofpipingsystemthoroughlyreadthesection
ofthismanualVENTPIPEPREPARATION.
If you are installing your system so that it vents through roof, please
refer to following section titled INSTALLATION OF VERTICAL VENT
SYSTEM.
VENT TERMINAL INSTALLATION, SIDEWALL
1. Installtheventterminalbyusingthecoverplateasatemplatetomark
the hole for the vent pipe to pass through the wall. BEWARE OF
CONCEALEDWIRINGANDPIPINGINSIDETHEWALL.
2. IftheVentTerminalisbeinginstalledonthe outsideofafinishedwall,
itmay be easier tomark both the insideand outside wall. Align the
holes by drilling a hole through the center of the template from the
insidethrough to the outside. Thetemplate can now bepositioned
ontheoutsidewall using the drilled hole asacenteringpoint for the
template.
3. A) MASONRYSIDEWALLS
Chiselanopeningapproximatelyonehalfinchlargerthanthemarked
circle.
B) WOODENSIDEWALLS
Drillapilot holeapproximatelyonequarterinchoutsideofthemarked
circle. This pilot hole is used as a starting point for a saws-all or
sabresawblade. Cutaroundthemarkedcirclestayingapproximately
onequarterinchoutsideofthe line. (This will allow the vent to easily
slidethrough the opening. The resulting gap will becovered up by
the Vent Terminal cover plate.) Repeat this step on inside wall if
necessary.
SEQUENCEOFINSTALLATIONS,FIGURE4
Cutalengthof3"PVCpipeabout3.5incheslongerthanthewallthickness
atthe opening. Gluetheventterminal "TEE" withscreenstothis section
ofpipe. Slidethewall plate over thepipetostopagainst"TEE". Placea
bead of caulking (not supplied) around the gap between the pipe and
coverplate. Applyenoughtofill some of the gap between the pipe and
wall. Placesome ofthecaulking ontheback oftheplatetoholditagainst
thewallafterinstallation. If the vent pipe is installed uptothewall,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.
Slidethepipe through the wall and insertintothe coupling on the other
sideof thewall,makingsurethattheventterminalends uppointedinthe
correctposition. (See fig. 5).
FIGURE5
PREPARATION OF BLOWER ASSEMBLY
1. Check to make sure that the wire harness is attached to the gas
valveand blower controlbox.
2. Makesurenomaterialisstillattachedtotheoutsideorinsideofblower
assembly.
3. Makesure that plastic tubing isstill attached to the pressureswitch
andfan housing. Also make surethat wiring connector frommotor
tocontrol box is securelyattached.
FIGURE6
4. Donot plug in powercord until vent systemis completely installed.
The Power Vent operates on 120 Vac, therefore a grounded outlet
mustbe within reach of the 6 footflexible power cordsupplied with
the vent (see fig.1). The power cord supplied may be used on unit
only where local codes permit. If local codes do not permit use of
flexible power supply cord:

9
POWERVENTWIRINGSCHEMATIC-FIGURE7
A. Remove two screws that secure side plate on control
boxandremoveplate.
B. Cut flexible power cord on inside of control box, as close
toinside wall as possible.
C. If flexible cordandstrain relief are removed, then
openinginboxmustbecovered.
D. Remove plastic cap intopofcontrolboxandinstall
suitable conduitfittinginenclosure.
E. Splicefieldwiringinto existing wiring using code
authorizedmethod(wire nuts, etc).
F. Becertainthatneutralandlineconnections are not
reversedwhenmakingthese connections. (See Figure 7).
G. Replace side panel and secure with two screws.
5. Theblowerdischargeadapterismadetoacceptonlystraightsections
of3"pipe. Tostart off with an elbow,a short section of the furnished
pipe,a minimumof2 inches,mustbe cutandglued intotheendofthe
elbowthat will mount onthe discharge adapter(see fig. 6).
6. An1/8 inch beadof high temperature silicone should be appliedto
thecircumferenceofthedischargeadapterjustbeforeinstallingthe
first section of pipe or elbow.
CAUTION
LABELALLWIRESPRIORTODISCONNECTIONWHENSERVICINGCONTROLS. WIRINGERRORSCANCAUSEIMPROPERANDDANGEROUS
OPERATION. VERIFYPROPEROPERATIONAFTERSERVICING.

10
INSTALLATION OF VENT SYSTEM, SIDEWALL
Withtherouteoftheventingsystemandselectionofmaterialscompleted,
as discussed in section of this manual titled PLANNING THE VENT
SYSTEM,thethrough thewallventterminal in placeandthefirst section
ofpiping, up tofirst elbow, installed at the blower it istime to complete
theinstallationoftheventing system for the sidewall installation.
Beforecompletingtheinstallationoftheventingsystembesuretoread
thesectionsofthismanualdiscussingtheproper method of cutting and
cementingPVCpipeandfittings:VENTPIPEPREPARATION.
Itisrecommendedthatthe completion of the venting system startatthe
blowerassembly and run to the coupling on theinside wall of the vent
terminal,Figure 5.
Theventsystempipingshouldbesupportedevery5feet of vertical run
andevery3feet of horizontal run. All piping andfittingsmustbejoined
bytheproperproceduresasdescribedunder:VENTPIPEPREPARATION.
FIGURE8
INSTALLATION OF VERTICAL VENT SYSTEM
This unit is approved for venting through the roof with only the vent
terminalthatisincludedwiththeunit,see Figure 9. A proper flashing or
"BOOT"shouldbe used tosealthepipewhere it exitstheroof. Thetotal
vent system should not exceed the thirty (30) equivalent feet of 3 inch
pipeor sixty (60) equivalentfeetof 4 inch pipeas listed in Table 1.
NOTE: The equivalent feet of pipe listed above are exclusive of the
"TEE"terminationwith installed screens.
Providesupportfor allpipeprotrudingthrough the roof. Allpipingshould
beproperly secured. Theventsystempipingshould besupportedevery
5 feet of vertical run and every 3 feet of horizontal run. All piping and
fittings must be joined by the proper procedures as described under:
VENTPIPEPREPARATION.
IMPORTANT
Theventsystemmustterminatesothatproperclearancesaremaintained
ascited inlocalcodesorthelatestedition oftheNationalFuelGasCode,
ANSIZ223.1andaslistedbelow:
1. VentTermination must extend aminimumof12inchesaboveroofor
12 inches above the anticipated snow level to prevent blockage of
theventtermination.
2. Theventing system shall terminate at least four (4) feet fromor one
(1)footaboveanygable, dormer or other roof structure withbuilding
interior access; i.e., vent, window, etc.
3. Theventing system shall terminatethree (3) feet aboveanyforced
airinletlocated within ten feet.
FIGURE9
VENT PIPE PREPARATION
1. INITIALPREPARATION
A. Makesurethesolventcementyouareplanningtouseisdesigned
forthespecificapplicationyou are attempting.
B. Know thephysicaland chemical characteristics and limitations
ofthePVCand CPVC piping materialsthatyouareabouttouse.
C. Know the reputationof your manufacturer andtheirproducts.
D. Know your own qualifications or those of your contractor. The
solvent welding technique of joining PVC and CPVC pipe is a
specializedskilljustasanyotherpipefitting technique.
E. Closely supervise the installation and inspect the finished job
beforestart-up.
F. Contact the manufacturer, supplier, or competent consulting
agency if you have any questions about the application or
installationof PVCandCPVC pipe.
G. Take the time and effort to do a professional job. Shortcuts will
only cause you problems and delays in start-up. By far, the
majority of failures in PVC and CPVC systems are the result of
shortcutsand/orimproperjoiningtechniques.
2. SELECTIONOFMATERIALS
• CuttingDevice-SaworPipeCutter
• DeburringTool,Knife, File,orBevelingMachine(2"and
above)
• Brush-PureBristle

11
• Rag-Cotton(Not Synthetic)
• PrimerandCleaner
• SolventCement-PVCforPVCComponentsandCPVCforCPVC
Components
• Containers-MetalorGlasstoholdPrimerandCement.Selectthe
typeofPVCor CPVC materials to be used onthebasisoftheir
applicationwithrespecttochemicalresistance,pressure rating,
temperaturecharacteristics,etc.
• InsertionTool- Helpful for larger diameter pipe and fittings
(6"and above).
PRIMER
Itis recommended thatTetrahydrofuran(THF)be used to prepare the
surfaces of pipe and fittings for solvent welding. Do not use water,
rags, gasoline or any other substitutes for cleaning PVC or CPVC
Surfaces.Achemicalcleaner such as MEK may be used.
CEMENT
Thecement should bea bodied cement ofapproximately 500 to1600
centipoiseviscositycontaining10-20%(byweight)virginPVCmaterial
solvated with tetrahydrofuran (THF). Small quantities of dimethyl
formamide(DMF)maybe included to act as aretardingagenttoextend
curingtime. Selecttheproper cement; Schedule 40 cement should be
usedforSchedule 40pipe.Neveruseall-purposecements, commercial
gluesandadhesivesorABScementto join PVC or CPVC pipe and
fittings.
SAFETYPRECAUTION:PRIMERSANDCEMENTSAREEXTREMELY
FLAMMABLE,ANDMUSTNOTBESTOREDORUSEDNEARHEATOR
OPENFLAME. ALSO,USEONLYINAWELL-VENTILATEDAREA.
3. MAKINGTHEJOINT
A. Cutting
Pipe must be squarely cut to allow for the proper interfacing of the
pipe end and the fitting socket bottom. This can be accomplished
with a miter box saw or wheel type cutter. Wheel type cutters are
notgenerallyrecommended for larger diameters sincetheytend to
flarethecornerofthepipeend.Ifthistype of cutter is used, the flare
ontheend must be completelyremoved.
NOTE:Powersawsshould be specifically designed to cut
plasticpipe.
STEPA
B. Deburring
Usea knife, plastic pipedeburring tool, or fileto remove burrs from
theendofsmalldiameterpipe.Besuretoremoveallburrsfromaround
theinsideaswellastheoutsideofthepipe.Aslightchamfer(bevel)
ofabout 10°-15°shouldbe addedtotheendtopermiteasierinsertion
ofthe pipe intothe end of the fitting. Failure tochamfer the edgeof
thepipemay removecementfromthefitting socket, causingthejoint
toleak.
STEPB
C.Test dry fit of the joint
Tapered fittingsocketsaredesignedso thataninterferencefitshould
occur when the pipe is inserted about 1/3 to 2/3 of the way into the
socket.Occasionally,whenpipefittingdimensionsareatthetolerance
extremes, it will be possible to fully insert dry pipe to the bottom of
thefittingsocket.Whenthishappens, a sufficientquantity ofcement
mustbeapplied to thejointtofillthegap between thepipeandfitting.
Thegapmustbefilledtoobtainastrong,leak-freejoint.
D. Inspection, cleaning, priming
Visuallyinspecttheinsideofthepipeand fitting sockets and remove
all dirt, grease or moisture with a clean dry rag. If wiping fails to
clean the surfaces, a chemical cleaner must be used. Check for
possibledamage such as splits orcracksand replace if necessary.
Depth-of-entry mark
Markingthedepth of entry is a waytocheckif the pipe has reached
the bottom of the fitting socket in step F. Measure the fitting depth
andmarkthis distanceonthepipe O.D.Youmaywantto addseveral
inches to the distance and make a second mark as the primer and
cementwill most likely destroy yourfirstone.
Applyprimer tothesurfaceof thepipeandfittingsocketwitha natural
bristle brush (see chart). This process softens and prepares the
PVCorCPVCforthesolventcementingstep.Movequicklyandwithout
hesitation to the cementing procedure while the surfaces are still
wet with primer.
E. Application of solvent cement
• Applythesolvent cement evenly andquicklyaround the outside
of the pipe at a width a little greater than the depth of the fitting
socket.
• Applyalightcoatofcementevenlyaroundtheinsideofthefitting
socket.Avoidpuddling.
• Applya second coat of cementto the pipe end.
STEPE
NOTE:Cans of cementand primer should be closedat all times when
notinuse topreventevaporationof chemicalsandhardeningofcement.
They are also very flammable and should be kept away from heat or
flame.
F. Joint assembly
Workingquickly,insertthepipeintothe fittingsocketbottomandgive
thepipe or fitting a1/4" turn to evenlydistributethe cement. Do not
continue to rotate the pipe after it has hit the bottom of the fitting
socket. A good joint will have sufficient cement to make a bead all
the way around the outside of the fitting hub. The fitting will have a
tendencyto slide back whilethe cement is still wet so holdthe joint
togetherfor about 15 seconds.
STEPF

12
G. Cleanup and joint movement
Remove all excess cement from around the pipe and fitting with a
drycotton rag. This must bedone while the cementisstill soft.
The joint should not be disturbed immediately after the cementing
procedure,and sufficienttime should be allowedfor proper curing
ofthejoint. Exactdryingtimeis difficulttopredictbecauseit depends
onvariables suchastemperature,humidityand cementintegrity.For
morespecificinformation, you should contactyoursolvent cement
manufacturer.
STEPG
GAS CONNECTIONS
Theminimumgassupplypressureforinputadjustmentis5.0"W.C. for
naturalgas(11.0" W.C.for propane).
THEHEATERISNOTINTENDEDFOROPERATIONATHIGHERTHAN14"
WATERCOLUMNSUPPLYPRESSURE. EXPOSURETOHIGHERGAS
SUPPLYPRESSUREMAYCAUSEDAMAGETOTHECONTROLWHICH
COULDRESULTINFIREOREXPLOSION. Ifoverpressurehasoccurred
suchasthrough improper testingofgaslinesor emergency malfunction
of the supply system, the control must be checked for safe operation.
Makesurethat theoutsideventson thesupplyregulatorsandthe safety
ventvalvesareprotectedagainstblockage. Thesearepartsof the gas
supply system not the heater. Vent blockage may occur during ice
storms.
ITIS IMPORTANTTOGUARDAGAINST CONTROLFOULINGFROM
CONTAMINANTSIN THEGASWAYS. SUCHFOULINGMAYCAUSE
IMPROPEROPERATION,FIREOREXPLOSION.
All piping must comply with local codes and ordinances or with the
NationalFuelGas Code(ANSIZ223.1NFPA-54) whicheverapplies.
REFERTOFIG.12 FORCONNECTIONDETAILS. BEFOREATTACHING
THEGASLINEBESURETHATALLGASPIPEISCLEANONTHEINSIDE.
TOTRAPANYDIRTORFOREIGNMATERIALINTHEGASSUPPLYLINE,
ADIRTLEG(SOMETIMESCALLEDDRIPLEG)MUSTBEINCORPORATED
INTHEPIPING,FIG.12. Thedirtlegmustbereadilyaccessible. Installin
accordance with recommendations of serving gas supplier. Refer to
thelatesteditionofANSI Z223.1.
To prevent damage, care must be taken not to apply too much torque
whenattachinggassupplypipetothermostat gas inlet. The thermostat
inlet has a pad for use with a backup wrench.
Applyjointcompounds(pipedope)sparinglyandonlytothemalethreads
of pipe joints. Do not apply compound to the first two threads. Use
compoundsresistanttothe action of liquefied petroleum gases. Donot
useteflontapeonthermostatfittings.
CONNECTION OF GAS PIPE
1. Whenconnectinggaspipe to unit,applywrenchto flangeonly. Note:
Do not use wrench on gas valve or gas valve bracket.
2. PERFORMTHEGASLEAKTESTANYTIMEWORKISDONEONA
GASSYSTEMTOAVOIDTHEPOSSIBILITYOFFIREOREXPLOSION
WITHPROPERTYDAMAGEPERSONALINJURYORLOSSOFLIFE.
TheGasLeakTest is performed as follows: Paint pipeconnections
upstream of gas control with a rich soap and water solution to test
forleaks before operating mainburner. Bubblesindicate gas leak.
To stop leak, tighten pipe connections. After piping connections are
checked,seeOPERATIONsectionbelow. Onceheaterisoperating
andmainburnerison: paintpipejoints(includingflanges),pilotgas
tubing connections and control inlet and outlet with rich soap and
watersolution. Bubblesindicategasleak. Tostopleak,tightenflange
screws, joints and pipe connections. Replace part if leak can't be
stopped.
DISCONNECTTHEAPPLIANCEANDITSINDIVIDUALSHUTOFFVALVE
FROM THE GAS SUPPLY PIPING SYSTEM DURING ANY SUPPLY
PRESSURETESTINGEXCEEDING1/2PSI(3.5kPa). GASSUPPLYLINE
MUSTBECAPPEDWHENDISCONNECTEDFROMTHEHEATER. FOR
TESTPRESSURESAT1/2PSI(3.5kPa)ORLESS,THEAPPLIANCENEED
NOTBEDISCONNECTED,BUTMUSTBEISOLATEDFROMTHESUPPLY
PRESSURETESTBYCLOSINGTHEMAINMANUALGASVALVE.
BEFOREPLACING THEHEATERINOPERATION,CHECKFORGAS
LEAKAGE. USESOAPANDWATERSOLUTIONOROTHERMATERIAL
ACCEPTABLEFORTHISPURPOSE.DONOTUSEMATCHESCANDLES,
FLAMEOROTHERSOURCESOFIGNITIONTOLOCATEGASLEAKS.
OPERATION
WARNING
DONOTATTEMPTTOOPERATEWATERHEATERWITHCOLDWATER
INLETVALVECLOSED.
NEVEROPERATETHEHEATERWITHOUTFIRSTBEINGCERTAINITIS
FILLEDWITHWATERANDATEMPERATUREANDPRESSURERELIEF
VALVEISINSTALLEDINTHERELIEFVALVEOPENINGOFTHEHEATER.
TO OPERATE THE HEATER
1. Closetheheaterdrain valve(Figure1-T)byturning handleclockwise
.
2. Open a nearby hot water faucet to permit the air in the system to
escape.
3. Fullyopen the cold water inlet pipe valve(Figure 1-M) allowing the
heaterandpipingtobefilled.
4. Close the hot water faucet as water starts to flow.
5. Theheater is ready to be operated.

13
WARNING: If you do not follow these instructions exactly, a fire or explosion
mayresultcausing property damage, personal injuryorloss of life.
• Immediately call your gas supplier from a neighbor’s
phone.Followthegassupplier’sinstructions.
• If you cannot reach your gas supplier, call the fire
department.
C. Use only your hand to push in or turn the gas control
knob.Neverusetools.Iftheknobwillnotpushinor turn
by hand, don’t try to repair it, call a qualified service
technician.Forceorattempted repair may result in afire
orexplosion.
D. Do not use this appliance if any part has been under
water.Theheatermustbereplaced.
OPERATINGINSTRUCTIONS
A. Set thermostat to thelowestsetting.
B. Turn offallthe electric power tothe appliance
if service is to be performed.
TOTURNOFF GASTOAPPLIANCE
BEFOREOPERATING:ENTIRESYSTEMMUSTBEFILLEDWITHWATERANDAIRPURGEDFROMALLLINES.
1. STOP! Readthesafetyinformationabove
onthislabel.
2. Turn the “ON/OFF” switch on the blower control box to
the“OFF” position.
3. Setthe thermostat tothelowestsetting. Turnthermostat
dialfully counterclockwise until it stops.
4. Thisappliance is equipped witha device which
automaticallylightsthe burner.
DONOTTRYTOLIGHTTHEBURNERBYHAND.
5. Wait five (5) minutes to clear out any gas. If
youthensmellgas, STOP! Follow"B" in the
safetyinformationaboveonthislabel.
Ifyoudon't smell gas, gotothe next step.
6. Setthermostattodesiredsetting.
7. Turnon all electrical power to theappliance.
8. Iftheappliance will not operate, follow the instructions
"TO TURN OFF GAS TO APPLIANCE" and call your
technicianorgassupplier.
9. WATERTEMPERATUREADJUSTMENT
Turn temperature knob by hand to the desired
temperature.
Hotis approximately120°F.
CAUTION: Hotter water increases the risk
of scald injury. Consult the instruction
manual before changing temperatures.
WARNING: TURNOFFALLELECTRIC
POWERBEFORESERVICING
A. This appliance doesnot have a pilot. It isequipped with
anignitiondevicewhichautomaticallylightstheburner.
DONOTTRYTOLIGHTTHEBURNERBYHAND.
B. BEFOREOPERATINGsmellallaroundtheappliancearea
forgas. Be sure tosmellnext to the floorbecause some
gasis heavier than air and will settleon the floor.
WHAT TODOIFYOUSMELL GAS:
• Donottrytolightanyappliance.
• Do not touch any electric switch;
donotuseanyphone in your building.
FORYOURSAFETYREADBEFOREOPERATING

14
PURGING
Gaslinepurgingisrequiredwithnewpipingorsystemsinwhich air has
entered.
CAUTION
PURGING SHOULDBEPERFORMEDBYPERSONSEXPERIENCEDINTHIS
TYPE OFGAS SERVICE. TOAVOIDRISKOFFIREOREXPLOSION,
PURGEDISCHARGEMUSTNOTENTERCONFINEDAREASORSPACES
WHEREIGNITIONCANOCCUR. THEAREAMUSTBEWELLVENTILATED
ANDALLSOURCESOFIGNITIONMUSTBEINACTIVATEDORREMOVED.
CAUTION
THE"ON/OFF"SWITCHONTHECONTROLBOXSHOULDNOTBETURNED
TOTHE"OFF"POSITIONUNLESSTHEUNITISBEINGSERVICED.
TEMPERATURE REGULATION
DANGER
THISWATERHEATERISEQUIPPEDWITHANADJUSTABLETHERMOSTAT
TOCONTROLWATERTEMPERATURE.HOTWATERTEMPERATURES
REQUIREDFORAUTOMATICDISHWASHINGANDLAUNDRYUSECAN
CAUSEPAINFULSCALDINGWITHPOSSIBLESERIOUSANDPERMANENT
INJURY.THETEMPERATUREATWHICHINJURYOCCURSVARIESWITH
THEPERSON’SAGEANDTHETIMEOFTHE EXPOSURE.THESLOWER
RESPONSETIMEOFCHILDREN,AGEDOR DISABLED PERSONS
INCREASESTHEHAZARDSTOTHEM.NEVERALLOWSMALLCHILDREN
TOUSEAHOTWATERTAP,ORTODRAWTHEIROWNBATHWATER.
NEVERLEAVE ACHILDORDISABLEDPERSONUNATTENDED INA
BATHTUBORSHOWER.
THEWATERHEATERSHOULDBELOCATEDINANAREAWHERETHE
GENERALPUBLICDOESNOTHAVEACCESS.IFASUITABLEAREAIS
NOT AVAILABLE, A COVER SHOULD BE INSTALLED OVER THE
THERMOSTATTOPREVENTTAMPERING.Suitablecoversareavailable
throughA.O.SmithWaterProductsCompany,5621W.115thStreet,Alsip,
IL60803.
Itisrecommended that lower water temperaturesbeused to avoid the
riskof scalding. It is furtherrecommended, in all cases,that the water
temperature dial be set for the lowest temperature that satisfies your
hot water needs. This will also provide the most energy efficient
operation of the water heater. The water temperature adjusting dial
wasfactorysetatthelowesttemperature;allthewaycounterclockwise
tothe mechanicalstop.Turningthedial counterclockwise decreases
temperatureandclockwise increasestemperature.
SETTINGTHEWATERHEATERTEMPERATUREAT120°F(49°C)(APPROX.
"HOT"MARKONFACEOFTHETEMPERATUREADJUSTINGDIAL)WILL
REDUCETHERISKOFSCALDS. Somestatesrequiresettingsatspecific
lowertemperatures.
Figure 10 shows the approximate water temperatures produced at
variousthermostatdialsettings.Shortrepeatedheating cycles caused
by small hot water uses can cause temperatures at the point of use to
exceed the thermostat setting by up to 20°F (11°C). If you experience
thistype of useyou should considerusing lower temperature settings
toreduce scald hazards.
Valves for reducing point of use temperature by mixing cold and hot
waterareavailable. Alsoavailableareinexpensivedevicesthatattach
tofaucetsto limit hotwatertemperatures.Contacta licensed plumberor
thelocal plumbingauthority.
Time to Produce 2nd & 3rd
Temperature Setting Degree Burns on Adult Skin
VERYHOT=APPROX.180°F(82°C) Almost Instantaneously
C=APPROX.162°F(72°C) About1/2Second
B =APPROX.145°F(63°C) About3Seconds
A=APPROX.130°F(54°C) More than 30 Seconds
HOT= APPROX.120°F(49°C) Morethan5Minutes
LOW= approx.80°F(27°C) NoHazard
FIGURE 10
MAINTENANCE
CAUTION
DISCONNECTFROMELECTRICALSUPPLYBEFORESERVICINGUNIT.
FORYOURSAFETY,WATERHEATERSERVICESHOULDBEPERFORMED
ONLYBYAQUALIFIEDSERVICETECHNICIAN. READTHEGENERAL
SAFETYINFORMATIONSECTIONFIRST.
USERS OF THIS APPLIANCE SHOULD BE AWARE THAT GAS
COMPONENTS WEAR OUT OVER A PERIOD OF TIME. THE GAS
CARRYINGCOMPONENTSOFTHISAPPLIANCESHOULDBEINSPECTED
FORPROPEROPERATIONPERIODICALLYBYAQUALIFIEDSERVICE
TECHNICIAN.
MAIN BURNER
Check main burner every 12 months for proper flame characteristics.
This is done by removing door(s) on heater. The main burner should
providecompletecombustionofgas;igniterapidly;givereasonablequiet
operation; cause no excessive flame lifting from burner ports. Make
surethatthe flow of combustion andventilationair is not blocked.
Ifproper flame characteristics are notevident, check for accumulation
oflintorotherforeignmaterialthat restricts or blocks the air openings in
theheaterorburner. AlsocheckAIRREQUIREMENTS.
WARNING
SOOTBUILD-UPINDICATESAPROBLEMTHATREQUIRESCORRECTION
BEFOREFURTHERUSE. Consultwithaqualifiedservicetechnician.
Shouldthemain burner or burnerairopeningsrequirecleaning,turn the
controlswitch to “OFF” positionandallow the burner tocool. Remove
theburnerandcleanwithasoftbrush. Cleanmainburnerorificewitha
suitablesoftmaterial.
WATER TEMPERATURE
ADJUSTING DIAL

15
HIGH TEMPERATURE CUT-OFF SWITCH
Thethermostat has a built-in temperature cut-offswitch (TCO), which
will shut off gas to the burner in case of excessive water temperature.
If the TCO functions the valve will flash 4 times and the valve must be
replaced. It is important that a serviceman be called to determine the
reasonforlimitoperationandthus avoid repeated thermostat resetting.
Lowerthetemperatureadjustmentdialsettingoncontrol.
VENTING SYSTEM
HAVE VENTING SYSTEM CHECKED EVERY SIX MONTHS FOR
OBSTRUCTIONSAND/ORDETERIORATIONINVENTPIPING.
A. Insofar as ispractical, close all doors,windows and air inletsto the
building. Turnon all exhaustfans (range hood, bathroomexhaust,
etc.) so they will operate at their maximum speed. Close fireplace
dampers.
B. Turnwatertemperature adjusting knob to full, counterclockwiseand
openwater faucet ifnecessary to keep burner in operation.
C. “CHECKING THE DRAFT.” Operate the water heater for several
minutes and check to see if it is venting properly by passing a lit
matchorpapernearthe opening of the Air Supply Box. Ifthedraftis
proper, the match flame will be drawn into the Air Supply Box (fig
11). Ifnot,thecombustionproductswilltendtoextinguishthe flame.
Ifanimproperdraftexists,donotoperatethewaterheateruntilproper
adjustmentsorrepairs are made to provideadequatedraft through
thegas vent.
D. Next, turn on all otherfuelburningapplianceswithinthesameroom
sothey will operate attheir full input.
RepeatstepC above.
FIGURE11
POWER VENTER MAINTENANCE
TheBTF-75 mustbeinspectedquarterly. Points of inspection are:
1. MOTOR - Motor must rotate freely. This is a sealed motor and no
oilingisrequired.
2. WHEEL - Wheel must be clean of soot, ash or any other coating
whichinhibits either rotation or air flow. Removeallforeignmaterial
fromventsystembefore operating.
3. AIRSUPPLYBOX-Everymonthcheckoperationandmakesurenothing
isblockingdilutionair entrance.
4. Thepressureswitch part inside the power venter must be open and
free from deposits of soot, carbon, etc.
Forsafetyandsatisfactoryoperationitisrecommendedthattheheater
bechecked once a yearby a competent serviceperson.
T & P VALVE
Atleastonceayear,thetemperatureandpressurereliefvalvemustbe
checked to ensure that it is in operating condition. Lift the lever at the
topofthe valveseveraltimesuntilthe valve seatsproperlyandoperates
freely.
WARNING
THEWATERPASSINGOUTOFTHEVALVEDURINGTHISCHECKING
OPERATION MAY BE EXTREMELY HOT. AVOID CONTACT AND
DISCHARGESAFELYTOPREVENTWATERDAMAGE.
DRAINING
Periodicallyopenthedrainvalveandallowthewatertorununtilitflows
clean. Thiswillhelppreventsedimentbuild-upinthetank.
Itisnormal for lime andscaledepositstoformwithinthe tank and onthe
heatexchanger surfaces. Suchdepositswillnotberemovedbyperiodic
draining. Itisnecessaryto chemically delime theaffectedparts in water
areas where such deposits are encountered. Contact your dealer or
plumberfor deliminginformation.
If the heater is to be shut off and exposed to freezing temperatures, it
must be drained. Water, if left in the tank and allowed to freeze, will
damagetheheater.
• Turn off the gas and cold water inlet valve to the heater.
• Opena nearby hot water faucet and theheater drain valve.
• BECAREFULTOGRASPTHEDRAINVALVEHANDLESOTHATTHE
HANDISNOTEXPOSEDTOHOTWATER. IFDESIRED,AHOSEMAY
BECONNECTEDTOTHEDRAINVALVETOCARRYTHE WATER
AWAY.
WARNING: The water CAN BE HOT.
Thedrainvalve must be left open duringtheshutdownperiod.
•To restart heater,refertotheinstructionsunderOPERATION.
MAIN BURNER AND IGNITER
Checkmainburner(figure 12) at least every 6 monthsforproperflame
characteristics. The main burner should display the following
characteristics:
1. Providecompletecombustionofgas.
2. Causerapid ignition and carryover offlameacross entire burner.
3. Givereasonablyquietoperationduringignition,burningandextinction.
4. Causeno excessive lifting offlames from burner ports.
If preceding burner characteristics are not evident, check for
accumulationoflint or other foreign material thatrestrictsor blocks the
airopeningsto the heater or burner.
WARNING
SOOTBUILD-UPINDICATESAPROBLEMTHATREQUIRESCORRECTION
BEFOREFURTHERUSE. CONSULTWITH A QUALIFIED SERVICE
TECHNICIAN.

16
Shouldthemain burner orburnerairopeningsrequirecleaning, remove
theburnerandcleanwithasoftbrush. Cleanmainburnerorificewitha
suitablesoftmaterial.
CHECKFORGOODFLOWOFCOMBUSTIONANDVENTILATINGAIRTO
THEUNIT. MAINTAINACLEAROPENAREAAROUNDTHEHEATERAT
ALLTIMES. DONOTSTORECOMBUSTIBLESORFLAMMABLELIQUIDS
NEARORAROUNDANAPPLIANCE.
FIGURE12-MAINBURNERANDIGNITERASSEMBLY
CONDENSATION
Water vapor can condense on the cooler surfaces of the tank forming
droplets,thesedrip into the fire orrunout on the floor. Thisis common
at the time of startup after installation, during periods of time when
incoming water is very cold, or the heater may be undersized for the
requirements.
Dropletsfromthe bottomofthefluemay beduetocorrosivecombustion
productsorimproper vent. Checkwithyourdealerformore information.
CATHODIC PROTECTION-ANODE
The anode rod within the tank is designed to be slowly consumed
cathodically,minimizingcorrosion in the glass lined tank. A hydrogen
sulfide(rottenegg)odormayresultifwatercontainshighsulfateand/or
minerals. Chlorinatingthe water supply should minimizethe problem.
(SeeEXTENDEDNON-USEPERIODS).
NOTE: Anode must remain installed (except for inspection) to avoid
shorteningtank life. SeeLIMITEDWARRANTY. Replaceas necessary.
SERVICE AND REPAIR
The A.O. Smith water heater requires no special care other than the
normalmaintenanceasnoted above. If you are having aproblemwith
yourwaterheater,beforecalling for service please refer to thefollowing
TROUBLESHOOTINGsections. If servicebecomesnecessary,contact
yourdealer,installeroran authorized service agent. Do not attemptto
repairthewater heater yourself. Any work performedbyunauthorized
personnelmay void the warranty.
Ifyou are having aproblemwith your A.O. Smithwater heater and are
notpleased with theservice you received:
• First,please contactyourdealerorthe A.O.Smithauthorizedservice
agent in your area and explain to them why you are not satisfied.
Thiswillusuallycorrectthe problem.
• If after working with your dealer or service agent the problem has
notbeen resolved to yoursatisfaction, please let usknowby either
writing to us at:
A.O.Smith WaterProductsCompany
ServiceDepartment
600EastJohnCarpenterFreeway
RochellePark,Suite200
Irving,TX 75038
or, going to our website at: www.hotwater.com
Pleaseclickon: "Mail",
thenclickon: "Service"
andleaveusamessage.
Please be sure to provide the following information when writing or
e-mailing:
• ModelNumber
• SerialNumber
• DateofOriginal Purchase
• DateProblemOriginated
• ExplanationofProblem
Also,pleasebesuretoincludeadaytime telephone number.
TROUBLE SHOOTING
Waterheater mayexhibitproblemsthat areunrelatedtoamalfunction of
thewaterheateritself. Thefollowinginformationand tables may serve
to answer your question about a problem that you are having without
havingtocall a service agent.
For your safety, water heater service should be performed only by a
qualifiedservicetechnician. ReadtheGENERALSAFETYINFORMATION
section first.
WATER HEATING CYCLE
(GASANDELECTRICPOWERAREON,“OFF/ON”SWITCHISON)
1) SMARTVALVE®(1)CALLSFORHEAT(SEEFIGURES7&12)
A) THERMOSTATSENSESNEEDFORHEATINGWATER
B) CONTACTSCLOSEINTHERMOSTAT,POWER(115VAC)
FLOWSTOBLOWERMOTOR
2) BLOWERMOTORROTATESBLOWERWHEEL
A) BLOWERWHEELSPEEDINCREASES
B) WHEELSPEEDINCREASES,AIRPRESSURESWITCH
CONTACTSCLOSE
3) 120VACFLOWSTOHOTSURFACEIGNITER
NOTE:THECONTROLMODULEONTHISUNITWILLTRYAMAXIMUMOF
THREETIMESTOLIGHTTHEUNIT. CYCLECANBERESTARTEDATANY
TIMEBYTURNINGOFFSWITCHANDTHENTURNINGBACKON. IFUNIT
HASGONE THROUGHTHREECYCLES ANDDIDNOTLIGHT,THEN
REPAIRMANSHOULDBECALLEDTOCHECKOPERATIONOFHEATER.
4) MAINBURNERIGNITES
A) GASFLOWSTOMAINBURNERPORTSANDISIGNITED
5) GASVALVESENSESBURNERFLAME
6) BURNERHEATSWATER
A) BURNERHEATSWATERTOTHERMOSTATSETTING
B) CONTACTSINTHERMOSTATOPEN,
C) CYCLEISCOMPLETED
IGNITER MAINBURNER

17
NOTENOUGHOR
NOHOT WATER
VENT PIPE TOO HOT
(ABOVE 170° F)
YELLOW FLAME
CONDENSATION
WATERLEAKS
LEAKING T&P VALVE
HOTWATERODORSORCOLOR
(RefertoCATHODICPROTECTION)
PROBLEM POSSIBLE MALFUNCTION SERVICETO BE PERFORMED
1) Blower will not run
A) “ON/OFF” control switch turned off
B) Blower unplugged
C) No power at outlet
D) “ON/OFF” switch defective
E) Control harness defective
F) Blower motor defective
2) Blower running, burner not on
A) Fan not running fast enough to close
air switch contacts
B) Air pressure switch defective
C) Gas valve defective
D) Control harness defective
E) Igniter defective
F) Unit has completed three trials to light
and failed
G) Discharge air limit tripped
3) Thermostat problems
A) Thermostat set too low
B) Thermostat or ECO defective
C) High limit control circuit open
4) Others
A) Heater undersized
B) Low gas pressure
C) Incoming water is unusually cold
D) Leaking hot water pipes or fixtures
A) Blower does not run when heater fired
B) Not enough dilution air to mix with flue
gases in “Tee”
C) Air in room too hot for mixing with flue gases
D) Wrong burner orifice
A) Dirt in burner ports
B) Combustion air path restricted
C) Not enough room air for proper combustion
A) Water on the floor under heater
B) Water dripping from fan
Improperly sealed, hot or cold supply connections,
relief valve, drain valve or thermostat threads
Leakage from other appliances or water lines
Condensation of flue products
Thermal expansion in closed water system
Improperly seated valve
High sulfate or mineral content in water supply or
iron or sulfate reducing bacteria in water supply
TROUBLESHOOTING
Foryour safety, water heater service shouldbe performed onlyby a qualified servicetechnician.
ReadtheGENERALSAFETYINFORMATIONsectionfirst.
WARNING:DONOTBY-PASSANYCONTROLSTOMAKEHEATEROPERATE.OPERATEONLYASWIREDFROMFACTORY.
Turn switch to the “ON” position.
Plug blower back into 115 vac. outlet.
Repair service to outlet.
Replace switch.
Replace control harness.
Replace blower and motor.
Replace switch.
Check for low voltage, less than 102 vac., have service
checked and repaired.
If voltage is above 102 vac., make sure there is not more than
30 Equivalent feet of 3 inch pipe or 85 equivalent feet of 4 inch
pipe installed or vent terminal blockage.
If at least 102 vac., less than 30 equivalent feet of 3 inch pipe
or 85 equivalent feet of 4 inch pipe and not terminal blockage,
replace blower.
Replace switch.
Replace gas valve.
Replace harness.
Replace igniter.
Reset cycle by turning switch off and then back on. If unit
does not light in three trials, call an authorized A.O. Smith
service representative.
Verify dilution air openings are free of obstructions.
Make sure there is no more than 30 equivalent feet of 3 inch pipe or
85 equivalent feet of 4 inch pipe.
Check for low voltage, less than 102 vac., have service
checked and repaired.
Make sure vent terminal is not blocked.
Turn temperature control higher.
Replace thermostat.
Replace.
Reduce hot water use.
Contact an authorized A.O. Smith service representative.
Allow more time for heater to re-heat.
Have plumber check and repair leaks.
Take unit out of service immediately, call an authorized A.O.
Smith service representative.
Proper air circulation must be provided for combustion and
dilution of flue temp. Refer to “INSTALLATION” section.
Room air to be used for dilution with combustion products in
flue should be less than 90°F.
Install correct orifice.
Turn off heater and gas, clean burner head.
Clear area around heater and check under heater, remove
any debris under heater and in openings in bottom cover.
Refer to installation manual - Confined and Unconfined Space
statements on page 4 and 5 for required openings.
See“CONDENSATION.”
Provide drip “TEE” to catch condensation, refer to pages 8 and 10.
Turn off heater & water, repair unit.
Inspect other appliances near water heater.
Referto “CONDENSATION.”
Install thermal expansion tank (DO NOT plug T&P valve).
Check relief valve for proper operation (DO NOT plug T&P valve).
Drain and flush heater thoroughly, chlorinate, refill and flush
again then chlorinate water supply.

18
OFF
BRITE - DM
1 FLASH
2FLASHES
3FLASHES
4FLASHES
5FLASHES
6FLASHES
LED STATUS INDICATES CHECK/REPAIR
No power to system control.
NormalOperation
This indication shows whenever the system is
powered, unless some abnormal event has occurred.
Setpoint error, internal failure detected.
Airflow proving switch remains open longer than
30 seconds after a call for heat begins.
Combustion air blower is not energized
until airflow proving switch opens.
Airflow proving switch remains open longer than
30 seconds after combustion air blower energized.
System goes into 5 minute delay period, with
combustion air blower off. At the end of the
5 minute delay, another ignition cycle will begin.
Thermal Cutoff open.
Combustion air blower is energized.
Internal hardware failure.
Flame signal sensed out of proper sequence.
Combustion air blower is energized.
System Lockout.
After 1 hour lockout reset delay, control will reset
and initiate a new ignition sequence if the call for
heat is still present.
1. Appliance On/Off switch in the Off position.
2. Line voltage input power at L1 and L2 connectors.
3. System wiring harness in good condition and securely
connected at both ends.
Not Applicable.
1. Replace control.
1. Airflow proving switch stuck closed.
2. Airflow proving switch mis-wired or jumpered.
WARNING
Line Voltage Hazard.
Can cause property damage, severe injury or
death.
Turn off appliance before coming in contact with
pressure switch and/or electrical connections.
1. Airflow proving switch operation, tubing and wiring.
2. Obstructions or restrictions in appliance air intake
or exhaust flue system that prevent proper combustion
air flow.
WARNING
Line Voltage Hazard.
Can cause property damage, severe injury or
death.
Turn off appliance before coming in contact with
pressure switch and/or electrical connections.
1. Replace Control.
1. Flame at main burner.
2. Replace control.
1. Gas supply off or at too low pressure to operate.
2. Damaged or broken HSI element.
3. Appliance not properly earth grounded.
4. Flame sense rod contaminated or in incorrect location.
5. HSI element located incorrect position.
6. HSI element or flame sense rod wiring in good
condition and properly connected.
7. Less than 100 Vac between flame rod and burner
pan with 120 Vac input to control.
8. Cycle external power or remove request for heat for
2 seconds and reapply.
TROUBLESHOOTING WITH THE LED

19
SV9560/SV9570 SMARTVALVE®WATER HEATER CONTROL
TROUBLESHOOTING GUIDE
START
l
CHECKFORPROPERVOLTAGEAT
CONTROLHARNESS(SEEINSETA).
VOLTAGESHOULDBE120V
BETWEEN120VCOMMON AND
120V HOT.
TURNON GASSUPPLYPLUG
HARNESSINTOSmartValve®
CONTROL. INITIATEAREQUEST
FORHEAT. COMBUSTIONBLOWER
SHOULDBEONANDPREPURGED.
IGNITERWARMSUPAND
GLOWSRED.
MAINVALVEOPENS AND MAIN
BURNERLIGHTS.
SYSTEMISOKAY.
CHECK:
• LINEVOLTAGEPOWER
• WIRING
WARNING
Line Voltage Hazard.
Can cause property damage,
severe injury or death.
Only a trained, experienced service
technician should perform this trouble-
shooting. Be certain to avoid contact
with pressure switch and/or electrical
connections.
CHECK:
• ISAIRPROOFINGSWITCHSTUCK
ORCLOSED.
• ISTHEFLUEBLOCKED.
• ISTHEWIRINGCONNECTED
PROPERLYTOTHESWITCHAND
COMBUSTIONBLOWER.
WITHIGNITERCABLECONNECTED,
MEASUREVOLTAGEATHSIELEMENT
OUTPUT(SEEINSETB)120VNOMINAL
CHECKDAMAGEDORBROKENHSI
ELEMENT.WARNING
Line Voltage Hazard.
Can cause property damage,
severe injury or death.
Only a trained, experienced service
technician should perform this trouble-
shooting. Be certain to avoid contact
with pressure switch and/or electrical
connections.
REPLACEHSI
CHECK:
• ISTHEAPPLIANCEEARTHGROUNDED
(120VBETWEEN HOTANDCHASSIS
GROUND).
• ISGAS SUPPLYOFF ORTOOLOW
PRESSURETOOPERATETHE
CONTROL.
• DOESBURNERFLAMEMAKEGOOD
CONTACTWITHTHEFLAMEROD.
• ISFLAMESENSERODCONTAMINATED
ORINANINCORRECTLOCATION.
• ISTHERE APPROXIMATELY 100VAV
BETWEENFLAMERODANDBURNER
PAN WITH120VACINPUTTO
CONTROL.
• IFALLOF THE ABOVE AREGOOD,
REPLACEIGNITERANDFLAMEROD
ASSEMBLY.
CYCLETHERMOSTATOFFANDBACKON
MAINBURNERLIGHTS REPLACESmartValve®CONTROL
NOTE: BEFORETROUBLESHOOTING
BECOME FAMILIAR WITH THE STARTUP
ANDCHECKOUTPROCEDURE.
REPLACESmartValve®CONTROL
WHENMEASURING VOLTAGE
ATCONNECTIONS, USE CARE
TO ASSURE TERMINALS ARE
NOT DAMAGED.
1
1
1
NO
NO
NO
NO
NO
YES
YES
NO

20
A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater.
1. THETANK
If the glass-lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potable
water therein, during the first THREE years after initial installation, the warrantor will supply a complete new A. O. Smith water heater of
equivalent size and current model. Some government agencies are requiring energy efficient standards for water heaters. In the event
regulations prohibit sale of a model of equivalent size and construction, A. O. Smith will provide a model which complies with the regulations
of your area, in which case the consumer will be charged the difference in price between the like replacement and the energy efficient model
required. The warranty on the replacement water heater will be limited to the unexpired term of the original warranty.
2. ALL OTHER PARTS
If within ONE year after initial installation of this water heater, any part or portion shall prove upon examination by the warrantor to be defective
in material or workmanship, the warrantor will repair or replace such part or portion at its option.
3. CONDITIONSAND EXCEPTIONS
This warranty shall apply only when the water heater is installed in accordance with local plumbing and building codes, ordinances and
regulations, the printed instructions provided with it and good industry practices. In addition, a temperature and pressure relief valve, certified
by and officially sanctioned and recognized independent testing agency and approved by the American Society of Mechanical Engineers,
must have been installed.
a. This warranty shall apply only when the heater is used:
(1) at temperatures not exceeding the maximum setting of the thermostat;
(2) at water pressure not exceeding the working pressure shown on the heater;
(3) when filled with potable water free to circulate at all times;
(4) in a non-corrosive and non-contaminated atmosphere;
(5) with factory approved anode(s) installed;
(6) in it's original installation location;
(7) in the United States, its territories or possessions, and Canada.
b. Any accident to the water heater, any misuse, abuse (including freezing or thermal expansion damage) or alteration of, any operation in
a modified form, or any attempt to repair tank leaks will void this warranty.
c. This warranty is void if a device acting as a backflow prevention device (check valves etc.) is installed in the cold water supply the
heater is connected to, unless an effective method of controlling thermal expansion is also installed at the heater(s) and operational at all
times. The relief valve installed on the heater is not an acceptable method.
4. SERVICEAND REPAIREXPENSES
Under the limited warranty the warrantor will provide only a replacement water heater or part thereof. The owner is responsible for all other
costs. Such costs may include but are not limited to:
a. Labor charges for service removal, repair or reinstallation of the water heater or any component part;
b. Shipping, delivery, handling, and administrative charges for forwarding the new heater or replacement part from the nearest distributor
and returning the claimed defective heater or part to such distributor.
c. All cost necessary or incidental for any material and/or permits required for installation of the replacement heater or part.
5. LIMITATIONS ON IMPLIED WARRANTIES
Implied warranties, including the warranty of merchantability imposed on the sale of this heater under state law are limited to one (1) year
duration for the heater or any of its parts. Some states do not allow limitation on how long an implied warranty lasts, so the above limitation
may not apply to you.
6. CLAIMPROCEDURE
Any claim under the warranty should be initiated with the dealer who sold the heater, or with any other dealer handling the warrantor’s
products. If this is not practicable, the owner should contact:
U.S. Customers Canadian Customers
A. O. Smith Water Products Company A. O. Smith Enterprises Ltd.
5621 West 115th Street P. O. Box, 310 - 768 Erie Street
Alsip, IL 60803 Stratford, Ontario N5A 6T3
Telephone: [phone] Telephone: [phone]
a. The warrantor will only honor replacement with identical or similar water heater or parts thereof which are manufactured or distributed
by the warrantor.
b. Dealer replacements are made subject to in-warranty validation by warrantor.
7. DISCLAIMERS
NOOTHEREXPRESS WARRANTYHAS BEENORWILL BEMADEINBEHALFOFTHEWARRANTORWITHRESPECTTOTHEHEATERORTHE
INSTALLATION,OPERATION,REPAIRORREPLACEMENT OFTHEHEATER. THEWARRANTORSHALLNOTBE RESPONSIBLEFOR WATER
DAMAGE,LOSSOFUSEOFTHEUNIT,INCONVENIENCE,LOSS ORDAMAGETOPERSONALPROPERTYOR OTHERCONSEQUENTIALDAM-
AGE. THEWARRANTORSHALL NOT BE LIABLE BYVIRTUEOFTHIS WARRANTYOR OTHERWISEFORDAMAGE TO ANY PERSONS OR
PROPERTY,WHETHERDIRECTORINDIRECT,ANDWHETHERARISINGINCONTRACTORINTORT.
a. Some states do not allow the exclusion or limitation of the incidental or consequential damage, so the above limitations or exclusions may
not apply to you.
b. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
Fill in the following for your own reference. Keep it. Registration is not a condition of warranty. The model and serial number are found on the
heater’s rating plate.
Model No. ____________________Serial No. ____________________________________________Date Installed________________________
Dealer’s Name________________________________________________________________________________________________________
Dealer’s Address _____________________________________________________________________Phone No.________________________
City and State _______________________________________________________________________Zip ______________________________
KEEP THIS WARRANTY POSTED ADJACENT TO THE HEATER FOR FUTURE REFERENCE.
Model BTF-75 Limited Warranty