A.O. Smith 185363-001 User manual

1
Instruction Manual
PRINTEDINTHEU.S.A 0905 PART NO. 185363-001
KEEPTHISMANUALINTHEPOCKETONHEATERFORFUTUREREFERENCE
WHENEVERMAINTENANCEADJUSTMENTORSERVICEISREQUIRED.
POWER VENTED GAS MODELS W/HOT SURFACE IGNITION
NOT FOR USE IN MANUFACTURED (MOBILE) HOMES
ALLTECHNICALAND WARRANTYQUESTIONS: SHOULDBEDIRECTEDTOTHELOCALDEALERFROMWHOMTHEWATERHEATERWAS
PURCHASED.IFYOUAREUNSUCCESSFUL,PLEASEWRITETOTHECOMPANYLISTEDONTHERATINGPLATEONTHEWATERHEATER.
RESIDENTIAL GAS WATER HEATERS
• For Your Safety •
ANODORANTISADDEDTOTHEGASUSED
BYTHISWATERHEATER.
C3 Technology® Gas Water Heaters meet the new
ANSI Z21.10.1 standard that deals with the accidental or
unintended ignition of flammable vapors, such as those
emitted by gasoline.
GAMA certification applies to
all residential gas water
heaters with capacities of 20
to100gallonswith inputrating
of 75,000 BTU/Hr. or less.
ADIVISIONOFA.O.SMITHCORPORATION
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.
IMPORTANT DEFINITIONS
•Qualified Installer: Aqualifiedinstallermust have abilityequivalentto a licensedtradesmanin the fieldsofplumbing,
air supply, venting and gas supply, including a thorough understanding of the requirements of the National Fuel Gas
Code as it relates to the installation of gas fired water heaters. The qualified installer must also be familiar with the
designfeaturesand useofflammable vaporignitionresistant waterheaters,and haveathorough understandingof this
instructionmanual.
•ServiceAgency: Aservice agencyalso must haveabilityequivalent toalicensed tradesman inthefields of plumbing,
air supply, venting and gas supply, including a thorough understanding of the requirements of the National Fuel Gas
Code as it relates to the installation of gas fired water heaters. The service agency must also have a thorough
understandingofthisinstructionmanual,and be able to perform repairs strictlyinaccordancewiththeservice guidelines
providedbythemanufacturer.
•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. Many gas suppliers also
offerservice and inspectionof appliances withinthe building.

3
GENERAL SAFETY

4
SAFEINSTALLATION,USEANDSERVICE...............................2
GENERALSAFETY ..................................................................3
TABLEOFCONTENTS ..............................................................4
INTRODUCTION ........................................................................4
Preparing for the New Installation ...................................4
TYPICALINSTALLATION ...................................................... 5-6
LOCATINGTHENEWWATERHEATER .....................................7
Facts to ConsiderAbout Location ............................... 7-8
InsulationBlankets ...........................................................8
CombustionAir and Ventilation forAppliances
Located in Unconfined Spaces........................................8
CombustionAir and Ventilation forAppliances
Located in Confined Spaces........................................ 8-9
INSTALLINGTHEWATERHEATER ......................................... 10
WaterPiping ..............................................................10-11
Temperature-Pressure Relief Valve............................... 11
GasPiping ......................................................................12
SedimentTraps ..............................................................13
BlowerAssembly Installation ........................................13
Vent Pipe Connection to Blower Assembly ................... 14
Venting and Installation ............................................ 14-15
LIGHTING&OPERATINGLABEL ............................................ 20
TEMPERATUREREGULATION ................................................ 21
FORYOURINFORMATION .....................................................22
Start Up Conditions ........................................................22
Condensate .................................................................... 22
Smoke/Odor....................................................................22
ThermalExpansion ......................................................... 22
Strange Sounds.............................................................. 22
OperationalConditions...................................................22
SmellyWater ..................................................................22
“Air” in Hot Water Faucets.............................................22
High Temperature Shut Off System ...............................22
PERIODICMAINTENANCE .......................................................23
Venting System Inspection ............................................23
Burner Inspection ...........................................................23
BurnerCleaning.............................................................. 23
Housekeeping .......................................................... 23-24
Anode Rod Inspection....................................................24
Temperature-Pressure Relief Valve Operation..............24
Draining ..........................................................................24
Drain Valve Washer Replacement ........................... 24-24
Service ...........................................................................25
LEAKAGECHECKPOINTS ......................................................25
REPAIRPARTS .......................................................................26
TROUBLESHOOTING ........................................................ 27-28
NOTES .............................................................................. 29-30
WARRANTY ...........................................................................31
Thank You for purchasing this water heater. Properly installed and
maintained,itshouldgiveyouyears of trouble free service.
AbbreviationsFoundInThisInstructionManual:
• CSA-Canadian StandardsAssociation
• ANSI-AmericanNationalStandardsInstitute
• NFPA- NationalFire ProtectionAssociation
• ASME-AmericanSocietyofMechanical Engineers
• GAMA-GasApplianceManufacturer’sAssociation
• UL- Underwriters Laboratories Inc.
This gas-fired water heater is design certified by Underwriters
LaboratoriesInc. underAmericanNationalStandard/CSAStandardfor
GasWaterHeatersANSIZ21.10.1 • CSA4.1 (current edition).
PREPARING FOR THE INSTALLATION
1. Read the “General Safety” section, page 3ofthis manual first and
thenthe entire manualcarefully. If you don’tfollowthe safety rules,
thewater heater will not operate properly. It could cause DEATH,
SERIOUSBODILYINJURYAND/ORPROPERTYDAMAGE.
Thismanualcontainsinstructions fortheinstallation, operation,and
maintenanceofthegas-firedwaterheater. Italsocontainswarnings
throughout the manual that you must read and be aware of. All
warningsandall instructions are essential to the proper operation
ofthewaterheater andyoursafety. Sincewecannot puteverything
on the first few pages, READ THE ENTIRE MANUAL BEFORE
ATTEMPTINGTOINSTALLOROPERATETHEWATERHEATER.
2. The installation must conform with these instructions and the local
code authority having jurisdiction. In the absence of local codes,
installationsshallcomplywiththeNationalFuelGasCodeANSIZ223.1/
NFPA54andtheNationalElectricalCode,NFPA70.Thesepublications
are available from The National Fire Protection Association, 1
BatterymarchPark,Quincy,MA02269.
3. The water heater when installed must be grounded in accordance
withthe local codes, or in the absence of localcodes:IntheUnited
States,theNational ElectricCode.ANSI/NFPA70.
4. If after reading this manual you have any questions or do not
understandany portionofthe instructions,callthe localgasutility or
themanufacturer whose name appears on the rating plate.
5. Carefullyplantheplace whereyou aregoing toput thewater heater.
Correct combustion,vent action,andvent pipe installationarevery
important in preventing death from possible carbon monoxide
poisoningandfires,seeFigures1and2.
Examinethelocationtoensurethewaterheatercomplieswiththe
“Locatingthe New Water Heater” sectioninthismanual.
6. ForCaliforniainstallationthiswaterheatermustbebraced,anchored,
or strapped to avoid falling or moving during an earthquake. See
instructionsfor correctinstallationprocedures. Instructions may be
obtained from California Office of the StateArchitect, 400 P Street,
Sacramento,CA95814.
7. Massachusetts Code requires this water heater to be installed in
accordancewithMassachusetts248-CMR2.00:StatePlumbingCode
and248-CMR5.00.
8. Complies with SCAQMDrule#1121anddistrictshavingequivalent
NOxrequirements.
INTRODUCTION
TABLE OF CONTENTS

5
TYPICAL INSTALLATION
GET TO KNOW YOUR WATER HEATER - GAS MODELS
A Vent Pipe–Exhaust
B Vent Terminal
C Vent Adapter-Rubber Boot
D Blower Assembly
E Cold Water Inlet
F Inlet Water Shut-off Valve
G Union
H Inlet Dip Tube
J Anode**
FIGURE1.
K Hot Water Outlet
L Outlet Receptacle (115 VAC)
M Temperature-Pressure Relief Valve
N Flue
O Flue Baffle Assembly**
P Insulation
Q Control Harness
R Rating Plate
S Gas Supply
T Manual Gas Shut-off Valve
U Ground Joint Union
V Drip Leg (Sediment Trap)
W Drain Valve
X Gas Valve-Thermostat
Y Drain Pan
Z Air Intake Screen - Base Pan
AA Inner Door
BB Outer Door
CC HSI Burner Assembly
DD Air Intake Screen -
Blower Assembly
EE FV Sensor Assembly
NATURAL HOT SURFACE IGNITER & MAIN BURNER
HOT
SURFACE
IGNITOR
SENSOR
PROPANE HOT SURFACE IGNITER&MAIN BURNER
TEMPERATURE INDICATORS
TEMPERATUREADJUSTMENT BUTTONS
HOT
SURFACE
IGNITOR
SENSOR
*CAUTION: 115 VAC IN CONTROL HARNESS
AND INSIDE OUTER DOOR
* ALL PIPING MATERIALS TO BE SUPPLIED BY CUSTOMERS.
** LOCATED UNDER THE BLOWER ASSEMBLY.
GAS MODELS
WITH HOT SURFACE IGNITION
& 2", 3" OR 4" PVC VENT CAPABILITY

6
TYPICAL INSTALLATION
FIGURE2.
MIXING VALVE USAGE
Thisappliancehasbeendesign certified as complying withAmerican
NationalStandard/CSAStandardfor waterheatersand is considered
suitablefor:
Water (Potable) Heating and Space Heating: All models are
consideredsuitableforwater (potable) heating and space heating.
HOTTERWATERCANSCALD:
Water heaters are intended to produce hot water. Water heated to a
temperature which will satisfy space heating, clothes washing, dish
washing,and other sanitizing needs canscaldandpermanently injure
you upon contact. Some people are more likely to be permanently
injured by hot water than others. These include the elderly, children,
the infirm, or physically/mentally handicapped. If anyone using hot
water in your home fits into one of these groups or if there is a local
code or state law requiring a certain temperature water at the hot
watertap, then you musttakespecialprecautions. In addition to using
the lowest possible temperature setting that satisfies your hot water
needs, a means such as a *Mixing Valve, shall be used at the hot
watertapsusedby these people or at the water heater. Mixingvalves
areavailableat plumbingsupplyorhardwarestores.Consulta Qualified
Installer or Service Agency. Follow mixing valve manufacturer’s
instructionsforinstallation of the valves. Before changing the factory
settingon thethermostat,readthe “TemperatureRegulation” sectionin
thismanual, see Figure 20.

7
FACTSTO CONSIDERABOUT THE LOCATION
Carefullychoose anindoorlocation for thenewwater heater, because
the placement is a very important consideration for the safety of the
occupantsinthebuildingandforthemosteconomicaluseoftheappliance.
This water heater is not for use in manufactured (mobile) homes
or outdoor installation.
Whetherreplacing an old water heater or putting the water heater in a
newlocation, thefollowingcritical points mustbeobserved:
1. Selectalocationindoorsasclose aspractical tothe ventterminal or
locationtowhichthewaterheaterventpipingisgoingtobeconnected,
andas centralized withthewater piping system aspossible.
2. Selected location must provide adequate clearances for servicing
andproper operation ofthewater heater.
Installationofthe waterheater mustbeaccomplishedinsuchamanner
that if the tank or any connections should leak, the flow will not cause
damagetothe structure. Forthis reason,it isnotadvisabletoinstallthe
waterheater in anatticor upper floor. Whensuch locationscannotbe
avoided,asuitabledrainpanshouldbeinstalledunderthe waterheater.
Drainpansare availableatyourlocalhardwarestore. Sucha drainpan
musthaveaminimumlengthandwidthofatleast2"(5.1cm)greaterthat
thewater heater dimensionsandmustbe piped to anadequatedrain.
Thepanmust not restrictcombustion air flow.
Water heater life depends upon water quality, water pressure and the
environment in which the water heater is installed. Water heaters are
sometimesinstalled in locationswhereleakage may resultinproperty
damage, even with the use of a drain pan piped to a drain. However,
unanticipateddamagecanbereducedorpreventedbyaleakdetectoror
watershut-offdeviceusedinconjunctionwithapipeddrainpan.These
devices are available from some plumbing supply wholesalers and
retailers,and detectandreactto leakageinvarious ways:
• Sensorsmounted inthedrain panthattrigger analarmor turnoffthe
incomingwater to thewaterheater when leakageisdetected.
• Sensorsmountedinthedrainpan thatturn offthewatersupplyto the
entirehome whenwateris detected inthedrain pan.
• Water supply shut-off devices that activate based on the water
pressure differential between the cold water and hot water pipes
connectedto thewaterheater.
• Devicesthat willturn offthegas supplytoa gaswaterheater whileat
thesame time shuttingoff its water supply.
INSTALLATIONSINAREASWHEREFLAMMABLELIQUIDS(VAPORS)
ARELIKELYTOBEPRESENTORSTORED(GARAGES,STORAGEAND
UTILITYAREAS,ETC.):Flammableliquids(suchasgasoline,solvents,
propane(LPor butane,etc.) andothersubstances(suchasadhesives,
etc.)emitflammablevaporswhichcanbeignitedbyagaswaterheater’s
hotsurface igniteror mainburner. The resultingflashback andfirecan
cause death or serious burns to anyone in the area. This water is
equipped with a FV sensor for detecting the presence of flammable
vapors, see Figure 3. When the sensor detects those vapors, the unit
willshut downand notoperate.Should thishappen,please refertothe
troubleshootingguideonpages27-28. Eventhoughthiswaterheateris
a flammable vapors ignition resistant water heater and is designed to
reduce the chances of flammable vapors being ignited, gasoline and
otherflammablesubstancesshouldneverbestoredorusedinthesame
vicinity or area containing a gas water heater or other open flame or
sparkproducingappliance.
LOCATING THE NEW WATER HEATER
FIGURE3.
Also, the water heater must be located and/or protected so it is not
subjecttophysical damageby amovingvehicle.
Thiswaterheater mustnot beinstalled directlyon carpeting. Carpeting
mustbeprotectedbymetalorwoodpanelbeneaththeapplianceextending
beyondthefullwidthanddepthoftheappliancebyatleast3"(7.6cm)in
any direction, or if the appliance is installed in an alcove or closet, the
entirefloor mustbecovered bythepanel. Failure toheedthis warning
mayresult in afirehazard.
Minimum clearances between the water heater and combustible
constructionare0inch atthe sidesandrear,5"(12.7cm)fromthefront

8
and 12" (30.5 cm) from the top. (Standard clearance.) If clearances
statedontheheaterdifferfromstandardclearances,installwaterheater
accordingto clearancesstatedonthe heater.
Adequateclearance forservicingthis appliance shouldbeconsidered
beforeinstallation,suchas changingtheanodes, etc.
A minimum clearance of 5" (12.7 cm) must be allowed for access to
replaceablepartssuchas thethermostats,drainvalveand reliefvalve.
Wheninstallingtheheater,considerationmustbegiventoproperlocation.
Locationselected should be asclosetothe wall as practicableandas
centralizedwith the waterpipingsystem as possible.
FIGURE4.
Agaswaterheatercannotoperate properlywithout thecorrect amount
ofairforcombustion. Do notinstallinaconfined areasuchasacloset,
unless you provide air as shown in the “Locating The New Water
Heater”section. Never obstruct the flow of ventilation air. If you have
anydoubtsor questionsatall, callyour gassupplier. Failuretoprovide
the proper amount of combustion air can result in a fire or explosion
andcause death, serious bodily injury,or property damage.
FIGURE5.
Ifthiswater heaterwill beusedinbeautyshops,barbershops,cleaning
establishments,or self-servicelaundrieswith dry cleaningequipment,
it is imperative that the water heater or water heaters be installed so
thatcombustion and ventilationairbe taken fromoutsidetheseareas.
Propellants of aerosol sprays and volatile compounds, (cleaners,
chlorinebased chemicals,refrigerants,etc.) in additiontobeing highly
flammableinmanycases, willalsoreacttoform corrosivehydrochloric
acid when exposed to the combustion products of the water heater.
Theresultscanbe hazardous, and also cause product failure.
INSULATIONBLANKETS
Insulationblankets are available tothegeneralpublic for external use
ongas water heaters but are not necessary withtheseproducts. The
purpose of an insulation blanket is to reduce the standby heat loss
encountered with storage tank heaters. Your water heater meets or
exceedstheNationalAppliance Energy ConversationActstandards
withrespectto insulation and standby loss requirements, makingan
insulationblanket unnecessary.
Should you choose to apply an insulation blanket to this heater, you
should follow these instructions (For identification of components
mentioned below, see Figure 1). Failure to follow these instructions
can restrict the air flow required for proper combustion, potentially
resultingin fire, asphyxiation, serious personal injury or death.
•Do not apply insulation to the top of the water heater, as this will
interfere with safe operation of the draft hood.
•Do not cover the outer door, thermostator temperature & pressure
reliefvalve.
•Do not allow insulation to come within 2" (5.1 cm) of the floor to
preventblockageofcombustion air flow to the burner.
•Do not cover the instruction manual. Keep it on the side of the
water heater or nearby for future reference.
•Doobtainnew warning andinstructionlabels from themanufacturer
forplacement on the blanket directly overtheexistinglabels.
•Do inspect the insulation blanket frequently to make certain it
doesnotsag,thereby obstructing combustion air flow.
COMBUSTIONAIRAND VENTILATION FOR
APPLIANCESLOCATED INUNCONFINED SPACES
UNCONFINED SPACE is space whose volume is not less than
50cubicfeet per 1,000 Btu per hour (4.8 cubic meters perkW)of the
aggregateinput ratingofall appliancesinstalledin that space. Rooms
communicating directly with the space in which the appliances are
installed,through openingsnotfurnished with doors,areconsidered a
partof the unconfined space.
Inunconfinedspacesinbuildings,infiltrationmaybeadequatetoprovide
airforcombustion,ventilationanddilutionoffluegases. However, in
buildingsof tight construction (forexample,weatherstripping, heavily
insulated,caulked, vapor barrier, etc.), additional air mayneed to be
providedusingthemethodsdescribedin“CombustionAirandVentilation
forAppliancesLocatedinConfinedSpaces.”
COMBUSTIONAIRAND VENTILATION FOR
APPLIANCESLOCATED INCONFINED SPACES
CONFINEDSPACEisaspacewhosevolumeis lessthan50cubicfeet
per1,000Btuper hour(4.8cmperkW) of theaggregateinput ratingof
allappliances installed inthatspace.

9
Chemicalvaporcorrosionoftheflue,blowerassembly andventsystem
may occur if air for combustion contains certain chemical vapors.
Spraycanpropellants,cleaningsolvents,refrigeratorandairconditioner
refrigerants,swimming pool chemicals, calcium and sodiumchloride,
waxes,bleach and process chemicals are typical compoundswhich
arepotentially corrosive.
A. ALLAIRFROMINSIDEBUILDINGS: (SeeFigure5and6)
The confined space shall be provided with two permanent openings
communicatingdirectly withanadditional room(s) ofsufficientvolume
so that the combined volume of all spaces meets the criteria for an
unconfinedspace. Thetotalinputofallgasutilizationequipmentinstalled
inthecombinedspaceshallbeconsideredinmakingthisdetermination.
Eachopening shall have a minimum free area of one square inchper
1,000Btuperhour(22cm2/kW)ofthetotalinputratingofallgasutilization
equipmentin the confinedspace,butnot less than100squareinches
(645 cm2). One opening shall commence within 12 inches
(31cm)ofthetopandonecommencing within12 inches(31 cm)of the
bottomoftheenclosures.
FIGURE6.
B.ALL AIRFROM OUTDOORS:(SeeFigures7,8and9)
Theconfinedspaceshall be provided with two permanent openings,
one commencing within 12 inches (31 cm) of the top and one
commencingwithin12inches(31cm)fromthebottomoftheenclosure.
Theopeningsshallcommunicatedirectly,orbyducts,with theoutdoors
orspaces (crawl or attic) that freelycommunicate with the outdoors.
1. Whendirectlycommunicatingwiththeoutdoors,each openingshall
havea minimum free area of 1 square inch per 4,000 Btuper hour
(5.5 cm2/kW)oftotalinput rating of allequipmentin the enclosure,
seeFigure7.
FIGURE7.
2. Whencommunicatingwiththeoutdoorsthroughverticalducts, each
openingshall haveaminimum freeareaof 1squareinch per4,000
Btuperhour(5.5cm2/kW)of totalinputrating ofallequipmentinthe
enclosure,see Figure 8.
3. When communicating with the outdoors through horizontal ducts,
eachopening shall have aminimumfreearea of 1 square inchper
2,000Btuper hour(11 cm2/kW))of totalinputratingofall equipment
inthe enclosure, see Figure 9.
FIGURE8.
4. When ducts are used, they shall be of the same cross-sectional
areaas the free area of the openingsto which they connect. The
minimumshort side dimensionofrectangularair ducts shallnotbe
lessthan3inches(7.6cm), see Figure 9.
FIGURE9.
5. LouversandGrilles:Incalculating freearea,consideration shallbe
givento the blocking effect oflouvers,grillesorscreens protecting
openings. Screens used shall not be smaller than 1/4 inch
(6.4mm) mesh. If the free area throughadesignoflouver or grille
isknown, itshouldbe used incalculatingthe sizeopeningrequired
toprovide the freeareaspecified. If the designandfree area isnot
known,it may beassumedthat wood louverswillbe 20-25 percent
freearea andmetallouvers and grilleswillhave 60-75 percentfree
area. Louvers and grilles shall be fixed in the open position or
interlockedwiththeequipmentsothattheyareopenedautomatically
duringequipmentoperation.
6. SpecialConditionsCreatedbyMechanicalExhaustingorFireplaces:
operation of exhaust fans, ventilation systems, clothes dryers or
fireplacesmaycreateconditionsrequiringspecial attentionto avoid
unsatisfactoryoperation of installedgasutilizationequipment.

10
The water within the water heater tank expands as it is heated and
increases the pressure of the water system. If the relieving point of the
water heater’s temperature-pressure relief valve is reached, the valve
will relieve the excess pressure. The temperature-pressure relief
valve is not intended for the constant relief of thermal expansion.
Thisisanunacceptableconditionandmust becorrected.
Itisrecommended thatany devicesinstalled whichcouldcreateaclosed
system have a by-pass and/or the system have an expansion tank to
relieve the pressure built by thermal expansion in the water system.
Expansion tanks are available for ordering through a local plumbing
contractor. Contactthe localwatersupplier and/or a serviceagencyfor
assistanceincontrollingthesesituations.
NOTE:To protectagainst untimely corrosionof hot andcold water
fittings, it is strongly recommended that di-electric unions or
couplings be installed on this water heater when connected to
copper pipe.
AllgaspipingmustcomplywithlocalcodesandordinancesorwiththeNational
FuelGasCode(ANSIZ223.1/NFPA-54)whicheverapplies.Copperandbrass
tubingandfittings(excepttinlinedcoppertubing)shallnotbeused.
FIGURE10.
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,cleaningandothersanitizingneedscanscaldandpermanently
injureyouuponcontact. Somepeoplearemorelikely tobepermanently
injuredbyhotwater thanothers. These includetheelderly,children, the
infirm,or physically/mentallyhandicapped. If anyoneusinghot waterin
yourhome fitsinto oneofthese groupsorif thereisa localcodeor state
lawrequiring a certaintemperaturewater at thehotwater tap, thenyou
musttakespecialprecautions. Inadditiontousingthe lowest possible
temperaturesettingthatsatisfiesyourhotwaterneeds,ameanssuchas
a*mixingvalve, shallbeusedatthehotwater tapsusedbythesepeople
or at the water heater, see Figure 2. Valves for reducing point of use
temperaturebymixingcoldandhotwaterare alsoavailable:
Consulta QualifiedInstallerorServiceAgency. Follow manufacturer’s
instructions for installation of the valves. Before changing the factory
settingon thethermostat,readthe“Temperature Regulation”sectionin
thismanual.
This water heater shall not be connected to any heating systems or
component(s)usedwitha non-potablewaterheating appliance.
Allpipingcomponentsconnectedtothisunitforspaceheatingapplications
shallbesuitablefor use with potable water.
Toxic chemicals, such as those used for boiler treatment shall not be
introducedintothissystem.
Whenthesystemrequireswaterforspaceheatingattemperatureshigher
thanrequiredfordomesticwaterpurposes,atemperingvalvemustbe
installed. PleaserefertoFigure2forsuggestedpipingarrangement.
Watersupplysystemsmay,becauseofsucheventsashighlinepressure,
frequent cut-offs, the effects of water hammer among others, have
installeddevices suchas pressurereducingvalves, checkvalves,back
flow preventers, etc. to control these types of problems. When these
devicesarenotequippedwithaninternalby-pass,andnoothermeasures
aretaken,the devicescausethewatersystem tobeclosed. Aswateris
heated,itexpands (thermalexpansion)andclosedsystemsdonotallow
for the expansion of heated water.
INSTALLING THE NEW WATER HEATER

11
Figure10 shows the typical attachment of the water piping to thewater
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 cold water inlet connection. Do not
solder the cold water supply line directly to the cold water inlet.
It will harm the dip tube and damage the tank.
T & P Valve and Pipe Insulation (if supplied)
Removeinsulation for T & Pvalveandpipe connections from carton.
FIGURE11.
Fit pipe insulation over the incoming cold water line and the hot water
line.Make sure that the insulationisagainstthe top cover of theheater.
FitT & P valveinsulationover valve. Make surethattheinsulation does
not interfere with the lever of the T & P valve.
Secureall insulationusingtape.
TEMPERATURE-PRESSURERELIEFVALVE
This heater is provided with a properly certified combination
temperature-pressurereliefvalvebythemanufacturer.
Thevalveis certified by a nationally recognized testing laboratory that
maintains periodic inspection of production of listed equipment of
materialsas meeting the requirementsfor Relief ValvesandAutomatic
GasShut-offDevicesforHotWaterSupplySystems,ANSIZ21.22•CSA
4.4,and the coderequirementsofASME.
Ifreplaced,thevalve mustmeet therequirementsof localcodes,but not
lessthan a combination temperature and pressure relief valvecertified
asindicated in the above paragraph.
Thevalve must be marked with amaximumsetpressurenot to exceed
the marked hydrostatic working pressure of the water heater
(150 psi = 1,035 kPa) and a dischargecapacitynotlessthanthe water
heaterinput rate as shown on the model rating plate.
For safe operation of the water heater, the relief valve must not be
removedfrom itsdesignatedopening nor plugged.
Thetemperature-pressure relief valvemustbe installed directlyintothe
fitting of the water heater designed for the relief valve. Position the
valvedownwardandprovidetubingsothatanydischargewillexitonly
within6 inches (15.2 cm) above,oratany distance below the structural
floor. Be certainthat nocontactismade withanyliveelectricalpart. The
discharge opening must not be blocked or reduced in size under any
circumstances. Excessivelength, over 30feet(9.14m), or useofmore
than four elbows can cause restriction and reduce the discharge
capacityof the valve, see Figures 10or 14.
No valve or other obstruction is to be placed between the relief valve
andthe tank. Do notconnecttubing directly todischargedrain unless a
6"(15.2cm) air gap is provided. Toprevent bodily injury,hazard to life,
orproperty damage,therelief valve mustbeallowed todischargewater
inquantities should circumstancesdemand. Ifthe discharge pipeisnot
connectedto a drainorother suitable means,thewater flow may cause
propertydamage.
TheDischargePipe:
•Shallnot be smaller in size than the outlet pipe size of thevalve, or
haveanyreducingcouplingsorother restrictions.
•Shallnot beplugged or blocked.
•Shallbe of material listed for hot water distribution.
•Shall be installed so as to allow complete drainage of both the
temperature-pressurerelief valve, and the discharge pipe.
•Shallterminateatan adequatedrain.
•Shallnot have any valve between thereliefvalveand tank.
Thetemperature-pressurereliefvalvemustbemanuallyoperatedatleast
onceayear. Caution shouldbe takento ensurethat(1)noone isinfront
oforaroundtheoutletofthetemperature-pressurereliefvalvedischarge
line, and (2) the water manually discharged will not cause any bodily
injuryor property damage because the water may be extremely hot.
If after manually operating the valve, it fails to completely reset and
continuesto release water, immediately closethecoldwater inlet to the
water heater, follow the draining instructions, and replace the
temperature-pressurerelief valve with a newone.

12
GAS PIPING
Makesure thegassupplied isthesame typelistedon themodelrating
plate. Theinletgaspressuremustnotexceed14inch watercolumn(3.5
kPa)fornaturalandpropanegas(L.P.). Theminimuminletgaspressure
shownon the ratingplateis that whichwillpermitfiring at ratedinput.
All gas piping must comply with local codes and ordinances or with the
NationalFuelGasCode(ANSIZ223.1/NFPA-54)whicheverapplies.Copper
andbrasstubingandfittings(excepttinlinedcoppertubing)shallnotbeused.
If the gas control valve is subjected to pressures exceeding 1/2 psi
(3.5kPa),thedamagetothe gas control valve could result in a fire or
explosionfrom leakinggas.
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”untilthewaterheaterinstallationiscomplete.
Agas line of sufficient size must be run to the water heater. Consult
thecurrenteditionofNationalFuelGasCodeANSIZ223.1/NFPA54and
yourgassupplierconcerningpipesize.
Theremustbe:
• A readily accessible manual shut off valve in the gas supply line
servingthewater heater,and
• A drip leg (sediment trap) ahead of the gas control valve to help
preventdirtandforeignmaterialsfrom enteringthe gascontrolvalve.
• Aflexible gas connectororaground joint unionbetweenthe shut off
valveandcontrolvalvetopermitservicingofthe unit.
Besure to check all the gas pipingfor leaks before lighting the water
heater. Useasoapy water solution,nota match oropenflame. Rinse
off soapy solution and wipe dry.
When installed at elevations above 7,700 feet (2,347 meters), input
rating should be reduced at the rate of 4 percent for each 1,000 feet
(305 meters) above sea level which requires replacement of the
burnerorificein accordancewithNationalFuelGas CodeANSIZ223.1/
NFPA 54. Contactyourlocalgassupplierfor further information.
Failureto replace the standard orifice with ahighaltitudeorifice when
installed could result in improper and inefficient operation of the
appliance, producing carbon monoxide gas in excess of safe limits,
whichcould resultinserious injury ordeath.Contact your gassupplier
for any specific changes which may be required in your area.
Usepipejoint compoundor teflontape markedasbeingresistanttothe
actionof petroleum [Propane(L.P.)] gases.
Theapplianceanditsgasconnectionmustbeleaktestedbeforeplacing
theappliance inoperation.
TheapplianceanditsindividualShut-offvalveshallbedisconnected
fromthe 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
closingitsindividualmanual Shut-offvalveduring anypressure testing
ofthe gas supply pipingsystemattest pressures equal to orlessthan
1/2pound per square inch (3.5 kPa).
Connectingthe gas piping to the gascontrolvalveof the water heater
canbe accomplished by either of thetwo methods shown in Figures
12and 13.
FIGURE12. GASPIPINGWITH
FLEXIBLECONNECTOR.
FIGURE13. GASPIPINGWITH ALL
BLACKIRONPIPETOGASCONTROL.

13
SEDIMENTTRAPS
A sediment trap shall be installed as close to the inlet of the water
heateraspractical atthetimeofwaterheaterinstallation.Thesediment
trapshallbeeither ateefittingwitha cappednipplein thebottom outlet
orother devicerecognizedas an effectivesedimenttrap. Ifateefitting
isused, it shallbeinstalledin conformance withoneof the methods of
installationshown in Figures 12 and 13.
Contaminantsinthe gaslinesmaycauseimproperoperationofthegas
controlvalve that may result in fire or explosion. Before attaching the
gasline be surethatall gas pipeisclean on theinside. Totrapanydirt
orforeignmaterialin thegas supplyline,adripleg (sometimescalled a
sedimenttrap)must beincorporated inthe piping. Thedrip legmust be
readilyaccessible. Install inaccordancewith the“GasPiping” section.
Refer to the current edition of the National Fuel Gas Code,
ANSIZ223.1/NFPA54.
FIGURE14.
FILLINGTHE WATERHEATER
Never use this water heater unless it is completely full of water. To
preventdamage to the tank, the tankmust be filled with water. Water
must flow from the hot water faucet before turning “ON” gas to the
water heater.
To fill the water heater with water:
1. Closethewaterheaterdrain valvebyturning thehandle to theright
(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 insurecompletefilling ofthetank,allow airtoexit byopeningthe
nearest hot water faucet. Allow water to run until a constant flow
isobtained. Thiswilllet air out of the water heater and the piping.
4. Checkallwaterpipingandconnectionsforleaks. Repairasneeded.
BLOWERASSEMBLYINSTALLATION
SEQUENCEOFINSTALLATION
1. Thispowerventedwaterheatercomeswiththeblowerassemblyinstalled.
2 Afterthe unit is set in place, make suretheblowerassemblyis still
mountedsecurely andthe airintakescreen oftheblower assembly
isinstalledin thedilutionair opening. Alsomakesure thedrainport
of the rubber boot vent adapter is capped off. Lastly, make sure
thereisnodamage to the blower.
3. Make sure there is no packing material in the discharge of the
blowerortheintakeof the dilution air restrictor,see Figure 15.
4. Makesurethattheplastictubingisstillattachedfromtheairpressure
switch to the port on the blower housing. Make sure the plastic
tubing is not folded anywhere between the pressure switch and
theblowerhousing.
5. Make sure the ON/OFF switchis in the OFF position andthat the
outer harness is connected from the blower control box to the
connectoronthebottomside of the gas valve.
6. If the outerharnessis not factoryinstalled,makesure the ON/OFF
switch is in the OFF position and then connect the outer harness
fromthe blower control box to the connector on the bottom side of
thegasvalve.
7. Do not pluginpowercord until ventsystemiscompletely installed.
This powered vent heater operates on 110-120 Vac, therefore a
grounded outlet must be within reach of the six (6) foot (1.8 m)
flexiblepower cordsupplied withtheunit (seeFigure1). Thepower
cordsuppliedmaybe used only where local codes permit. If local
codes do not permit the use of a flexible power supply cord:
a.) Makesuretheunitisunplugged from wall outlet. Remove screws
andopenpanel on front of control box.
b.) Cut the flexible power cord, leaving enough to be able to make
connections,theremovethestrainrelieffitting from box.
c.) Install suitable conduit fitting in side of enclosure and then follow
(d.) and (e.) below.
d.) Splicefieldwiringintoexistingwiring usingcode authorizedmethod
(wire nuts, etc.).
e.) Becertainthatneutral and liveconnectionsarenot reversed when
makingthese connections.
f.) Closepanelonthesideofcontrol box,make surethat accesspanel
issecured shut.

14
VENTCONNECTIONS TO BLOWERASSEMBLY
Figure15showstheoptimalplacementofthe2"to3"or3"to4"reducer;
however,theventcanbereducedatanypointintheventsystemaslong
asthemaximumandminimumventlengthrequirementsaremet.
FIGURE15.
VENTINGAND INSTALLATION
Plan the layout of the vent system from the vent termination to the
water heater considering all of the 90° and 45° elbows plus the
number of feet of pipe that would be needed to install the total vent
system. The water heater must be vented to the outdoors as
described in these instructions. DO NOT connect this water heater
to an existing vent or chimney. It must be vented separately from
all other appliances. Nonmetallic vent may be used if it has “Heat
DeflectionTemperature”(HDT@66 psi)or 455 kPa of at least157°F
or69°C.Typical nonmetallic vent materials meeting this requirement
are: PVC (Schedule 40, ASTM D-1785), Coex Cellular Core
(Schedule 40,ASTM F-441), CPVC (Schedule 40,ASTM D-2846),
ABS (Schedule 40, ASTM D-2661). The fittings, other than the
supplied VentTermination should be equivalent to the following:
PVC(Schedule 40,DWV,ASTMD-2665), CPVC (Schedule40,DWV,
ASTM F-438),ABS (Schedule 40 DWV,ASTM D-2661).
The cement used should be as recommended by the vent pipe
manufacturer.Seetheinstructions on pages18 and 19 for the proper
methodof cuttingandcementing the PVCpipeand fittings.

15
Theunitmaybe ventedhorizontallythroughawall orverticallythrough
theroof. Pipe runs must be adequately supported along both vertical
and horizontal runs as follows:
• ForSchedule40,2" PVC,ABS,CoexCellularCore ventpipe: Every
3feet(0.9 m).
• ForSchedule40,3" PVC,ABS,CoexCellularCore ventpipe: Every
3.5feet(1.1m).
• ForSchedule40,4" PVC,ABS,CoexCellularCore ventpipe: Every
4feet(1.2 m).
• ForSchedule 40, 2" CPVC ventpipe:Every5 feet (1.5 m).
• ForSchedule 40, 3" CPVC ventpipe:Every6 feet (1.8 m).
• ForSchedule 40, 4" CPVCventpipe:Every 6.5 feet (2.0 m).
It is imperative that the first hanger (or support) be located on the
horizontal run immediately adjacent to the first 90-degree elbow
from the vertical rise. Support method used should isolate the vent
pipe from the floor joists or other structural members to prevent
the transmission of noise and vibration. Do not support, pin, or
otherwise secure the venting system in a way that restricts the
normal thermal expansion and contraction of the chosen venting
material.
Ifthe water heater is being installed asa replacement for an existing
power vented heater in pre-existing venting, a through inspection
of the existing venting system must be performed prior to any
installation work. Verify that the correct material as detailed above
hasbeen used, and that the minimum ormaximum vent lengths and
terminallocation as detailed in this manual have been met. Carefully
inspect the entire venting system for any signs of cracks or
fractures,particularly at the joints between elbows and other fittings
and the straight runs of vent pipe. Check the system for signs of
sagging or other stresses in the joints 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 venting
instructions in this manual before completing the installation and
putting the water heater into service.
Except where instructed in this manual, the mixing of 2", 3" and 4"
vent pipe is NOTALLOWED. If 2" pipe is to be used, then a 2" to 3"
bell reducer is recommended. Figure 15 shows the recommended
location for the bell reducer. If the bell reducer is located at the
rubber boot on the blower assembly, then a short section of 3"
vent pipe needs to be installed in the rubber boot for proper
connection of the 2" to 3" bell reducer. That length can be of the
minimum length required for the connection.
If 4" pipe is to be used, then a 3" to 4" bell reducer is recommended.
Figure 15 shows the recommended location for the bell reducer. If
the bell reducer is located at the rubber boot on the blower
assembly, then a short section of 3" vent pipe needs to be installed
in the rubber boot for proper connection of the 3" to 4" bell reducer.
Thatlength can beoftheminimum length requiredfortheconnection.
The 40,000, 50,000, 55,000 and 62,500 BTU units are supplied
with a 2" Schedule 40 PVC 22.5° Vent Terminal. If you decide to
vent with 3" or 4" pipe, a Schedule 40 DWV 45° Vent Terminal must
be used. For your convenience, we have included a screen for
both 3" and 4" VentTerminals.
The vent piping should be connected to the blower with a rubber
adapter and secured with hose clamps. The adapter and clamps
are provided with the heater.
Even the flue gas temperature leaving the blower is between 140°F
(69°C)and175°F(79°C),someinstallationswillhavewatercondensate
inthe vent piping. Ifthisoccurs,then adequate means ofdrainingand
disposingof the condensate needs to be made by the installer.
CONDENSATE
Condensateformationdoesnotoccurinallinstallationsofpowervented
waterheaters, but should be protected against on installationswhere
itcan form in the ventingsystem.Condensationin the venting system
ofpowerventedwaterheatersisdependentuponinstallationconditions
including, but not limited to ambient temperature and humidity of
installationlocation,ambienttemperatureandhumidityofventingspace,
ventdischarge and slope, and productusage. In certain conditions,
installationsinunconditioned spaceorhavinglonghorizontalorvertical
ventrunsmay accumulate condensate. In these conditions, the vent
pipe should be sloped downward away from the blower assembly
1/4"(6.4 mm) perfivefeet(1.5 m) ofpipebutnot more than11/2"(3.8
cm)inthetotalventlength.Iftheventpipingisvented level or sloped
upwards away from the blower assembly, then adequate means for
draining and disposing of the condensate needs to be made by the
installer(if condensateisdetected). Ifyou havecondensate,then a 3/
8"drainhosecanbeconnectedto the built-in drain port of the rubber
bootonthe blower assembly. Foryourconvenience,therubberboot
is supplied with a removable cap on the built-in drain port. Prior to
operatingthewaterheater,make sure the removable cap is installed
onthedrain port (if a drain hose isnotneeded).
MAXIMUM AND MINIMUM VENT LENGTHS
40,000BTU Units:
For 2" Venting, the maximum equivalent feet of pipe allowed
is40 feet(12.2 m).Thisdoesnot includethe suppliedventtermination
forthewater heater. Forthe2"venting,one90°elbowisapproximately
equal to 5 feet (1.5 m). One 45° elbow is approximately equal to 2.5
feet(0.8m). Itisrecommendedthatatleast2feet(0.6m) of spacing
beusedin between all 45° elbows and all 90°elbows.
For 3" Venting, the maximum equivalent feet of pipe allowed
is120feet(36.6m).ThisdoesnotincludetheVentTermination(supplied
locally) for the water heater. For the 3" venting, one 90° elbow is
approximatelyequal to5feet (1.5m). One45° elbowisapproximately
equalto 2.5feet(0.8m). It is recommendedthatat least 2feet(0.6 m)
ofspacing be used in between all45° elbows and all 90°elbows.
For 4" Venting, the maximum equivalent feet of pipe allowed
is160feet(48.8m).ThisdoesnotincludetheVentTermination(supplied
locally) for the water heater. For the 4" venting, one 90° elbow is
approximatelyequal to8feet (2.4m). One45° elbowisapproximately
equalto 4feet(1.2 m). Itisrecommended thatatleast 2feet(0.6 m)of
spacingbeused in between all 45° elbows and all90°elbows.
50,000BTU Units:
For 2" Venting, the maximum equivalent feet of pipe allowed
is40 feet (12.2m).Thisdoes notincludethesuppliedVentTermination
forthewater heater. Forthe2"venting,one90°elbowisapproximately
equal to 5 feet (1.5 m). One 45° elbow is approximately equal to 2.5
feet(0.8m). Itisrecommendedthatatleast2feet(0.6m) of spacing
beusedin between all 45° elbows and all 90°elbows.
For 3" Venting, the maximum equivalent feet of pipe allowed
is120feet(36.6m).ThisdoesnotincludetheVentTermination(supplied
locally) for the water heater. For the 3" venting, one 90° elbow is
approximatelyequal to5feet (1.5m). One45° elbowisapproximately
equalto 2.5feet(0.8m). It is recommendedthatat least 2feet(0.6 m)
ofspacing be used in between all45° elbows and all 90°elbows.

16
For 4" Venting, the maximum equivalent feet of pipe allowed
is160feet(48.8m).ThisdoesnotincludetheVentTermination(supplied
locally) for the water heater. For the 4" venting, one 90° elbow is
approximatelyequal to8feet (2.4m). One45° elbowisapproximately
equalto 4feet(1.2 m). Itisrecommended thatatleast 2feet(0.6 m)of
spacingbeused in between all 45° elbows and all90°elbows.
55,000and 62,500 BTUUnits:
For 2" Venting, the maximum equivalent feet of pipe allowed
is35feet (10.6m). ThisdoesnotincludethesuppliedVentTermination
forthewater heater. Forthe2"venting,one90°elbow isapproximately
equal to 5 feet (1.5 m). One 45° elbow is approximately equal to 2.5
feet(0.8m). Itisrecommendedthatatleast2feet(0.6m) of spacing
beusedin between all 45° elbows and all 90°elbows.
For 3" Venting, the maximum equivalent feet of pipe allowed
is80feet (24.4 m).ThisdoesnotincludetheVentTermination(supplied
locally) for the water heater. For the 3" venting, one 90° elbow is
approximatelyequal to 5feet(1.5 m). One45°elbow is approximately
equalto 2.5feet(0.8m). It is recommendedthatat least 2feet(0.6 m)
ofspacing be used in between all45° elbows and all 90°elbows.
For 4" Venting, the maximum equivalent feet of pipe allowed
is120feet(36.6m).ThisdoesnotincludetheVentTermination(supplied
locally) for the water heater. For the 4" venting, one 90° elbow is
approximatelyequal to8feet (2.4m). One45° elbowisapproximately
equalto 4feet(1.2 m). Itisrecommended thatatleast 2feet(0.6 m)of
spacingbeused in between all 45° elbows and all90°elbows.
VENTING
The vent system must terminate so that proper clearances are
maintainedas citedinlocal codes orthecurrent editionoftheNational
FuelGas Code,ANSIZ223.1/NFPA54,7.3.4eand 7.8a,b,asfollows:
1. The exit terminals of a mechanical vent system shall be not less
than7feet (2.13 m) above grade when located adjacenttopublic
walkways, see Figure 16.
2. A venting systemshallterminate at least3feet (0.91 m)aboveany
forcedairinletlocated within 10 feet (3.1 m), see Figure 16.
3. The venting system shall terminate at least 4 feet (1.2 m)below,4
feet (1.2 m) horizontally from or, 1 foot (0.31 m) above any door,
windoworgravity air inlet into any building.
Themanufactureralsorecommendsthattheventterminationshould
notbeinstalledcloserthan3feet(0.91m)fromaninsidecornerofan
Lshapedstructureandnotbelessthan1foot(0.31m)abovegrade.
Theventshallterminateaminimumof12'' (30.5cm)aboveexpected
snowfallleveltopreventblockageofventtermination,seeFigure16.
4. Incoldclimates,itisrecommendedthatventterminationnotbemounted
directlyabove or within 3 feet (0.91 m) horizontally from an oil tank
vent or gas meter to avoid potential freeze-up from condensation,
seeFigure16..
Planthe vent system layoutsothatproper clearancesare maintained
fromplumbing andwiring.
Vent pipes servingpowervented appliances areclassifiedbybuilding
codesas “vent connectors”. Required clearances from combustible
materialsmustbeprovidedinaccordancewithinformationinthismanual
underLOCATIONOFHEATERandVENTTERMINALINSTALLATIONS,
andwith the NationalFuelGasCode and localcodes.
VENTTERMINAL INSTALLATION
1. After the point of termination has been determined,usethecover
plate as a template to mark the hole for the vent pipe to insert
throughthewall.BEWAREOFCONCEALEDWIRINGANDPIPING
INSIDE OFWALL.
2. If the VentTerminal is being installed on the outside of a finished
wall, it may be easier to mark both the inside and outside wall.
Alignthe holes by drilling aholethroughthecenter of the template
fromthe inside through to the outside. The template can now be
positionedon the outside wall using the drilled hole as a centering
pointforthetemplate.
3. A) MASONRYSIDEWALLS
Chisel an opening approximately one half inch larger than the
markedcircle.
B) WOODENSIDEWALLS
Drill a pilot hole approximately one quarter inch outside of the
marked circle. This pilot hole is used as a starting point for a
saws-allor sabre sawblade. Cutaround the markedcirclestaying
approximately onequarter inch outside oftheline. (Thiswill allow
the vent pipe to easily slide through the opening. The resulting
gapwill be covered upby thevent terminalcover plates.) Repeat
this step on inside wall if necessary.

17
FIGURE16.
Thisunit can vent through 2", 3" or 4"nonmetallicpipeandfittings.
Theventpipeinstallationcanbestartedfromeithertheblowerdischarge
orthetermination wall. Keep in mind the total vent system (pipeand
elbows) when installing the vent system, see VENTING AND
INSTALLATION, pages14-16.
FIGURE17.
The vent terminal should be kept as close as possible to the outside
wall,butyouneed to allow at least 1.5" (3.8 cm) of pipe past the wall,
forthe wall flange and vent terminal to mount on the pipe.
Beforetheventterminalisinstalled,caulk(notsupplied)aroundthepipe
ontheexteriorwallandinstalltheoptionalwallflange.Theflangecanbe
heldtotheoutsidewallbyplacingsomeofthecaulkingonthebackofthe
flange.The wall flange issuppliedfordecorative purposes only andis
notarequirementfor theventtermination(ifnotneededbytheinstaller).
VERTICALVENT THROUGH ROOF
This unit is approved for venting through the roof with the type vent
terminal that is included with the unit. A proper flashing or “BOOT”
shouldbe used to seal the pipe where it exits the roof.
Thetotal vent system should not exceedthat which is specified, see
VENTINGANDINSTALLATION,pages14-16.
Allofthepipeshouldbesecuredaspertheinstructionsintheinstructions
intheVENTINGANDINSTALLATION,pages14-16.
VERTICALVENT TERMINATIONRESTRICTIONS
1. Minimum of twelve 12" (30.5 cm) above the roof or twelve 12"
(30.5cm)abovetheanticipatedsnowlevel. Provide propersupport
forallpipeprotrudingthroughtheroof.
FIGURE18.
2. 4' (1.2 m) from or 1' (0.3 m) above any gable, dormer, or other roof
structurewithaccess to interior of building (i.e.-vent, window etc.).
3. 3'(0.9m)aboveanyforcedairinletlocatedwithin10'(3.0m).

18
VENTPIPE PREPARATION
1. INITIALPREPARATION
A. Make sure the solvent cement you are planning to use is
designedfor the specific application you are attempting.
B. Knowthephysicalandchemicalcharacteristicsandlimitations
ofthePVCandCPVCpipingmaterialsthatyouareabouttouse.
C. Know thereputationof yourmanufacturerand their products.
D. Know your own qualifications or those of your contractor.
Thesolventweldingtechnique ofjoining PVCandCPVCpipe
isa specialized skill just as any other pipe fitting technique.
E. Closely supervise theinstallationandinspect the finished
jobbefore start-up.
F. Contact the manufacturer, supplier,orcompetent consulting
agency if you have any questions about the application or
installationofPVC andCPVCpipe.
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
resultof shortcuts and/or improper joining techniques.
2. SELECTIONOFMATERIALS
• CuttingDevice - SaworPipeCutter
• DeburringTool, Knife,File,or BevelingMachine(2" and above)
• Brush- Pure Bristle
• Rag- Cotton(NotSynthetic)
• PrimerandCleaner
• SolventCement-PVCforPVCComponentsand CPVCfor CPVC
Components
• Containers -MetalorGlassto holdPrimer andCement. Select the
type of PVC or CPVC materials to be used on the basis of their
application with respect to chemical resistance, pressure rating,
temperaturecharacteristics, etc.
• InsertionTool -Helpfulforlarger diameter pipeandfittings 6inches
(15.2cm) and above.
PRIMER
Itis recommended that Tetrahydrofuran(THF) beusedtopreparethe
surfaces of pipe and fittings for solvent welding. Do not use water,
rags, gasoline or any other substitutes for cleaning PVC or CPVC
surfaces.Achemical cleaner such as MEK may be used.
CEMENT
Thecement should be abodiedcementof approximately 500 to1600
centipoiseviscositycontaining10-20% (byweight) virginPVCmaterial
solvated with tetrahydrofuran (THF). Small quantities of dimethyl
formamide(DMF)may beincludedtoactas aretardingagenttoextend
curingtime. Selecttheproper cement;Schedule40 cementshouldbe
usedforSchedule40pipe.Neveruseall-purposecements,commercial
glues and adhesives or ABS cement to join PVC or CPVC pipe and
fittings.
APPLICATORS
Select a suitable pure bristle type paint brush. Use a proper width
brush or roller to apply the primer and cement (see chart below).
Speedy application of cement is important due to its fast drying
characteristics. IMPORTANTNOTE:Adaubertypeapplicatorshould
only be used on pipe sizes 2" and below. For larger diameter pipe, a
brushorrollermustbeused.
RECOMMENDEDBRUSH* SIZEFOR PRIMER
ANDCEMENTAPPLICATIONS
Nominal Pipe Size Brush Width
(IPS) (INS.)
2 1-1/2
3 1-1/2 - 2-1/2
*USEONLYNATURALBRISTLE
3.MAKINGTHEJOINT
A. Cutting
Pipemust be squarely cut to allow for the proper interfacing of the
pipeendand the fitting socket bottom. This can beaccomplished
with a miter box saw or wheel type cutter. Wheel type cutters are
notgenerally recommendedforlarger diameterssincethey tendto
flare the corner of the pipe end. If this type of cutter is used, the
flareon the endmustbe completely removed.
NOTE:Power sawsshould be specificallydesigned to cutplastic pipe.
STEPA

19
B. Deburring
Useaknife,plasticpipedeburringtool,orfiletoremoveburrsfromtheend
ofsmalldiameterpipe. Besuretoremoveallburrsfromaroundtheinside
aswellastheoutsideofthepipe. Aslightchamfer(bevel)ofabout10°-
15°shouldbeaddedtotheendtopermiteasierinsertionofthepipeinto
theendofthefitting. Failuretochamfertheedgeofthepipemayremove
cementfromthefittingsocket,causingthejointtoleak.
STEPB
C. Test dry fit of the joint
Taperedfittingsocketsaredesigned sothatan interfacedfitshould
occurwhen the pipe is inserted about 1/3 to 2/3ofthewayinto the
socket. Occasionally, when pipe fitting dimensions are at the
toleranceextremes,itwillbepossibletofullyinsertdrypipetothe
bottomofthe fittingsocket. When thishappens,asufficientquantity
ofcementmust beappliedtothejoint tofillthegapbetweenthepipe
andfitting. The gapmustbe filledtoobtain astrong,leak-free joint.
D. Inspection, cleaning, priming
Visuallyinspecttheinsideofthepipeand fittingsocketsandremove
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 suchassplitsorcracks and replaceifnecessary.
Depth-of-entry
Markingthe depthofentry isaway tocheckif thepipehas reached
thebottom of the fitting socket in Step F. Measurethe fitting depth
and mark this distance on the pipe O.D. You may want to add
several inches to the distance and make a second mark as the
primerandcement will most likely destroy your first one.
Applyprimer to the surface of the pipe andfitting socket with a natural
bristlebrush.ThisprocesssoftensandpreparesthePVCorCPVCfor
thesolventcementingstep. Movequicklyandwithouthesitationtothe
cementingprocedurewhilethesurfacesarestillwetwithprimer.
E. Application of solvent cement
• Applythesolventcementevenlyandquicklyaroundtheoutsideofthe
pipeatawidthalittlegreaterthanthedepthofthefittingsocket.
• Applyalightcoat of cement evenly around the inside of the
fittingsocket. Avoid puddling.
• Applyasecondcoat of cement to the pipe end.
STEPE
F. Joint assembly
Working quickly, insert the pipe into the fitting socket bottom and
givethe pipeorfittinga 1/4 turntoevenly distribute thecement.Do
notcontinue torotatethe pipeafterit hashitthe bottomofthe fitting
socket.Agood joint willhavesufficientcement to make a bead all
theway around the outside of the fitting hub. The fitting willhavea
tendencyto slide back whilethecement is still wet soholdthe joint
togetherforabout 15 seconds.
STEPF
G. Cleanup and joint movement
Removeallexcesscementfromaroundthepipeandfittingwitha
drycottonrag.This must be done while the cement is still soft.
Thejoint should not be disturbed immediately after the cementing
procedure,and sufficient time should be allowed for proper curing
ofthejoint.Exactdryingtimeisdifficulttopredictbecauseitdepends
onvariablessuch as temperature, humidity and cement integrity.
For more specific information, you should contact your solvent
cementmanufacturer.
STEPG

20
FORYOUR SAFETYREADBEFOREOPERATING
WARNING: If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, personal injury or loss of
life.
A. Thisappliancedoes not have a pilot. It is equipped with
anignition device which automatically lights theburner.
Do NOT try to light the burner by hand.
B. BEFOREOPERATINGsmellallaroundtheappliancearea
forgas.Be sure to smell next to the floor becausesome
gasis heavier than air and will settleon the floor.
WHATTODO IFYOUSMELLGAS:
• Donot try to light any appliance.
• Do not touch any electric switch;
Donot use any phone inyourbuilding.
• Immediatelycallyourgassupplierfromaneighbor’sphone.
Followthe gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
C. Use only your hand to push in the gas control buttons.
Never use tools. If the control buttons will not push in,
don’ttryto repairthem,callaqualifiedservicetechnician.
Forceorattemptedrepairmayresultinafireorexplosion.
D. Do not use this appliance if any part has been under
water. Immediatelycontacta qualifiedinstallerorservice
agencytoreplaceafloodedwaterheater. Donot attempt
torepair theunit!It mustbereplaced!
OPERATINGINSTRUCTIONS
1. Setthethermostattothelowestsettingby firstpressingtheCOOLER andHOTTER buttonstogetherandholding
for1 second. ThenpresstheCOOLER button until theWARMindicator light appears.
2. Set the ON/OFF switch on the blowercontrolboxtothe“OFF”position.
3. Turn off all electricpower to the appliance if service is to be performed.
BEFORE OPERATING: ENTIRE SYSTEM MUST BE FILLED WITH WATERANDAIR PURGED FROMALLLINES.
1. STOP! Readthe safetyinformationabove,
onthis label.
2. Set the thermostat to the lowest setting by first pressing
theCOOLER and HOTTER buttons togetherand
holdingfor1second.Thenpressthe COOLER button
untiltheWARMindicator lightappears.
3. Set the “ON/OFF”switchon theblowercontrol box tothe
“OFF”position.
4. This appliance is equipped with a device which
automaticallylightsthe burner.
DONOTTRYTOLIGHTTHEBURNERBYHAND.
5. Wait five (5) minutes to clear out any gas.
Ifyou then smell gas, STOP! Follow“B” in the
safetyinformationaboveonthislabel. Ifyou don’tsmell
gas,go to the next step.
6. Turn on all electrical power to the appliance.
7. Set thermostat to desired setting by first pressing the
COOLER andHOTTER buttonstogether and
holding for 1 second. Then press the HOTTER
button.
8. If the appliance will notoperate,followthe instructions
“TOTURN OFF GAS TOAPPLIANCE” and call your
technicianor gas supplier.
9. WATERTEMPERATUREADJUSTMENT
is approximately120°F.
CAUTION: Hotter water increases the risk
of scald injury. Consult the instruction
manual before changing temperature.
WARNING: TURNOFFALLELECTRIC
POWERBEFORESERVICING
TO TURN OFF GAS TOAPPLIANCE