Eternal GU145 (S)/ 508 User manual

Service Information Center:
Call us rst ifyou haveanyquestionswiththisproduct.Wecan helpyou with questionsabout assembly
andWaterHeateroperationorifthereareanydamagedormissingpartswhenyouunpackthisunitfromthe
shipping box. Please callbeforereturningto the store.
1-866-946-1096
8am-4pmCST, MondaythroughFriday
157140081PDate2013/7/22
Installation Operation Manual
NaturalGas(NG)-FactoryDefault
LiquidPropaneGas(LPG)-OptionalOri ce
ModelGU145(S)/508(11,12,21,22)1145(S)
ModelGU195(S)/508(11,12,21,22)1195(S)
ModelGU195(M)/ 508(11,12,21,22)1195(M)
CaliforniaProposition 65 listschemicalsubstancesknownto thestate tocausecancer,birth defects,death,
seriousillnessorotherreproductiveharm. Thisproductmaycontainsuchsubstances,be theiroriginfromfuel
combustion (gas,oil)orcomponentsof the product itself.
WARNING
! !
Read this Operator'sManualcarefully andbesureyourWaterHeateris properly assembled, installed and
maintained.Failureto follow theseinstructionsexactlycouldresultin re,explosion,seriousbodily injuryand/or
propertydamage.
Donotstore orusegasoline orother ammable vaporsandliquidsin the vicinityof thisoranyotherappliance.
WARNING
! !
IMPORTANT:
● Only speciallytrained andauthorizedpersonnel arepermittedtoservicethiswaterheater.
●
NOTETOASSEMBLER/ INSTALLER:
Leavethismanualwith the consumer.
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NOTETOCONSUMER:
Keep thismanualforfuture reference.
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RECORD YOUR SERIAL# ________________
(seesilverCSAlabelon GasWaterHeater)
C
Onlyalicensedprofessionalcan install Eternalunitsforsafetyand code compliance.Ventingand plumbing
codescan varybylocation. Installation instructionsand all applicablecodesmustbe followed orproperty
damage,severeinjury,ordeathmayresult. Failureto usealicensedplumberorcontractor,followventing,
plumbing,and building codes;orfollowinstallation instructionsmaybeunlawfulandwillvoidthe product
warranty.GrandHallisnot responsibleforanycostsincurredforrepairinganyproblemsresultingfrom failureto
follow installation instructionsorapplicable codes.
WARNING
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TableofContents
Included &OptionalAccessories P3
Specifications P4
Dimensions P5
Parts&Service PartsList P6~10
Pre-InstallationInstructionsforYourSafety P11
InstallationPreparation P12
CondensateDisposal P13
Indoor&OutdoorInstallation P14~15
Mobile Home Installation P16~18
Wall&FloorMounting P19~20
VentingIntake &Exhaust Material P21
VentingSpecification &ECAdapterInstallation P22
Vertical&HorizontalTermination P23~24
Clearance Requirementsfrom VentTerminationsto Building Openings P25
MultipleUnitsTermination P26
Common Venting Installationmon VentInstallation P27
Concentric Vent Kit &OutdoorVent Kit Installation P28
VentPipe Installation&TerminatorPosition P29
GasSupplyPiping P30
LPConversion P31
WaterSupplyConnection P32
Condensate Piping P33
Temperature andPressure Relief Valve &IPC ForRecirculationApplication P34
ElectricalConnection P35
OptionalRemote ControllerInstallation P36~37
MCU Installation P38~40
PlumbingDiagrams P41~43
RecoveryPump &WaterPipe Size P44
Operating Instructions P45
How To UseTheFront ControlInterface P46
How To Use theRemoteController& Ignition Cycle Counter P47
Maintenance and Service P48
"D"button DiagnosticFunction P49
Diagnostics P50~52
How To Check GasCombustion P53~54
WiringandConnection Diagram P55~56
Grand HallLimitedWarranty P57~59

3
IncludedAccessories
OptionalAccessories
Self Tapping Screw
5/32" x5/8" : 2pcs
PhilipsHeadScrew
M8x15: 4pcs
Stainless Steel ExpansionBolt
: 4pcs

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EternalHybrid WaterHeaterTechnicalSpecications
ModelName GU145 / GU145(S) GU195(S)/ GU195(M)
Thermal Ef ciency(
*
) / EnergyFactor 98%NG / 99%LP/ 0.96 EnergyFactor
Installation Indoor/ Outdoor / Wall Hung / Floor Standing
Flue System Sealed Combustion Direct Vent / Power Vent Convertible
Vent Run 3"PVC Upto100ft, 6ElbowsMax, 5ftDeductionPerElbow
CondensateDischargeLowFire/ MedFire/ High Fire 0.5GPH /1.1GPH / 1.75GPH
CondensatepH Level 4 pH
Gas Type Pre-set for NG / LPConversion Kit Included
UnitConnections Gas and Water 3/4"FemaleNPT
Electricity Dedicated 120VAC, 60Hzw/3ProngedPower Cord
Gas Input Rate Min/ Max 26,000BTU/Hr / 145,000 BTU/Hr 26,000BTU/Hr / 195,000 BTU/Hr
Gas SupplyPressure NG / LP 3.5"WC to10.5"WC / 8"WC to14"WC
ManifoldPressure
(minimum)
Timeengineering NG ( + )0.1" W.C. NG ( + )0.1" W.C.
Serial#(G902367~G1101155) PG ( + )0.1" W.C. PG ( + )0.1" W.C.
Timeengineering
Serial# (G1101156~G1111021)
NG ( - )0.02" W.C. NG ( - )0.02" W.C.
PG ( - )0.02" W.C. PG ( - )0.02" W.C.
Honeywell
Serial #(G1111022~)
NG ( - )0.01" W.C. NG ( - )0.01" W.C.
PG ( - )0.01" W.C. PG ( - )0.01" W.C.
Ignition System Direct ElectronicIgnition w/AutomaticFlameSensing
Burner System SingleOri cePremixed FuelInjection Metal FiberInfrared
Gas ValveSystem DualStageNegativePressureFull ModulationAir Ratio
Internal PipingMaterial StainlessSteel
ReserveTank 2 Gallons
ElectricalConsumption Standby8W, Max45W Standby8W, Max85W
Maximum Noise Level 40dB(a) 50dB(a)
RemoteController Upto3kits
MultiUnit Capable Upto2inmanifold, NoBuilt - InMCU / M Option- MCU upto8Units
GPMCapacityRange 0.1to14.5GPM 0.1to19.5GPM
TemperatureSensing Tank, ColdInlet, Hot Outlet, AirThermistors
TemperatureControl Simulation Feed Forwardand Feed Back,ComputerControlled Mixing Valve
Flow Sensing DualFlow Sensorsw/Built-inGPM Monitor
TemperatureSettingsRange 100°Fto180°FFactoryLimited to140°Fin5°FSteps
UnitDimensions(WxHxD) 16.9" x29.1"x13.8"
UnitWeight 83Ibs/ M Option- 85Ibs
SafetyDevices T&PValve,FlameRod,ThermalFuse(306°F), Remaining Flame
Detection,FanRPMCheck,FreezeProtection(-40°F),VentBlockage
Detection,ThermostatSwitches(167°F/194°F), GasValveCurrent
Leak Detection,IgnitionPrevention,Dipswitch TemperatureLock,GFCI
w/2x5AFuses.
GU145Sand GU195Sareforsingleordualunitapplicationswithnomulticontrolunit. The GU195M is for
multiple unit applicationsonlyand cannot be used forsingleunit applications.
*Maximum manifoldpressureisindicated ontherating labelon rightsideof the unit.
*IndependentDOEtested.
*

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Dimensions-GU145(S) / 508(11,12,21,22)1145(S)
GU195(S,M)/508(11,12,21,22)1195(S,M)

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Parts Diagram for ModelGU145(S) /508(11,12,21,22)1145(S)
GU195(S,M)/508(11,12,21,22)1195(S,M)

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Parts Diagram for ModelGU145(S) /508(11,12,21,22)1145(S)

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KEY DESCRIPTION
1Panel, FrontAssembly
2Panel,Top /RearAssembly
3Panel, Rear
4Panel, Left Assembly
5 Panel, RightAssembly(GU145(S))
6Panel, Bottom
7 MountingBracket
8WallBracket
9 Controller/Front
10 T&P Relief Valve (CashAcme)
11 Vent Collar
12 Vent CollarPacking
13 RubberFoot
14 Drain ValveAssembly
15 MainPowerCord
16 Handle
17 CondensingNipple
18 MeshScreen
19 OutdoorVenting Cap (Optional)
20 Trap CleanerAssembly
21 RadialBlowerAssembly
22 GasValve
23 AirPressureSwitch (GU145(S))
24 BurnerAssembly
25 MainController(GU145(S))
26 ColdWaterTube Assembly(GU145(S))
27 Hot WaterTube Assembly(GU145(S))
28 Flexible SilencerKit
29 MixingValve
30 ECAdapter
31 WaterPressureSwitch
32 FloaterValve
Parts List forModel GU145(S) / 508(11,12,21,22)1145(S)

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Parts Diagram for ModelGU195(S) /508(11,12,21,22)1195(S)
Parts Diagram for ModelGU195(M)/508(11,12,21,22)1195(M)

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Parts List forModel GU195(S,M)/ 508(11,12,21,22)1195(S,M)
KEY DESCRIPTION
1Panel, FrontAssembly
2Panel,Top /RearAssembly
3Panel, Rear
4Panel, Left Assembly
5 Panel, RightAssembly(GU195(S,M))
6Panel, Bottom
7 MountingBracket
8WallBracket
9 Controller/Front
10 T&P Relief Valve (CashAcme)
11 Vent Collar
12 Vent CollarPacking
13 RubberFoot
14 Drain ValveAssembly
15 MainPowerCord
16 Handle
17 CondensingNipple
18 MeshScreen
19 OutdoorVenting Cap (Optional)
20 Trap CleanerAssembly
21 RadialBlowerAssembly
22 GasValve
23 AirPressureSwitch (GU195(S,M))
24 BurnerAssembly
25 MainController(GU195(S,M))
26 ColdWaterTube Assembly(GU195(S,M))
27 Hot WaterTube Assembly(GU195(S,M))
28 Flexible SilencerKit
29 MixingValve
30 ECAdapter
31 WaterPressureSwitch
32 FloaterValve

11
Pre-InstallationInstructionsforYourSafety
WARNING
If youdo not follow theseinstructionsexactly,a reorexplosion couldresultcausingpropertydamage,personal
injuryorloss of life.
InstallationCodes
BeforeInstallation
Theinstallationmustconformwith localcodesor,inthe absenceoflocalcodes,with NationalFuelGasCode,
ANSIZ223.1/NFPA54.
Properlygroundtheunitinaccordancewithall localcodesorintheabsenceoflocalcodes,withtheNational
ElectricalCodes,ANSI/NFPA70.
Thiswaterheaterdoesnot haveapilot. Itisequippedwith anignitiondevicethat automaticallylightstheburner.
Donottryto light the burnerbyhand.
Smellallaround the waterheaterarea forevidence ofleaking gas.Besureto smellnextto the oorbecauseLP
gasisheavierthanairand willsettleonthe oor.
Useonlyyourhandtoturnthe manualgasvalveknob. Neverusetools. Ifthe knob willnot turnbyhand, don't try
to repairit. Calla quali ed servicetechnician. Force orattempted repaircould result ina re orexplosion.
Donotusethiswaterheaterifanyparthasbeenunderwater.Immediatelycallaquali ed servicetechnician to
inspect the waterheaterandto replaceanydamaged parts.
Farawayfromwaterheater
In approved containers
Tightlyclosed
Out of children'sreach
Cannot beseen
Vapors areheavierthan air
Go along wayonthe oor
Can becarriedfrom otherroomstothemainburnerbyaircurrents
Turn offallelectricalpowertothewaterheaterif service isto be performed.
Turn the manualgasvalve locatedontheoutsideof the unit clockwiseto the off position.
Vapors from ammableliquidswill explodeandcatch recausingdeath orsevereburns.Donot useorstore
ammableproductssuchasgasoline, solventsoradhesivesinthesameroomorarea nearthewaterheater.
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Keep ammableproducts
Vapors
TOTURN OFFGASTOWATER HEATER
WARNING
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WHATTO DOIFYOU SMELLGAS
Do not try to light anyappliance.
Do not touch anyelectricalswitch; do not useanyphone in yourbuilding.
Immediately callyourgassupplierfrom a neighbor'sphone. Follow the gassupplier'sinstructions.
If you cannotreach yourgassupplier,callthe redepartment.
WARNING
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! !
Usethis waterheaterat yourownrisk.The setoutletwatertemperaturecan causesevereburnsinstantly
ordeathfrom scalds.Testthe waterbeforebathing orshowering.Donotleavechildren orthe in rmwithout
supervision.
WARNING
! !
Eacheternalisequippedwithacomputercontrolledmixingvalveto ensureprecisetemperatureisbeing
delivered. Modulation noiseisnormaland shouldnotbe of concern.
NOTE
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12
Installation Preparation
Unpack theunit carefully andmakesure that allaccessoriesare put asidesotheywillnot be lost.
●Operator'smanual●WarrantyRegistration Card●Included Parts
Inspect thewaterheaterforpossible shipping damages.
Checkthemarkingsoftheratingplateonthewaterheatertobecertainthetypeofgasbeingfurnished
correspondsto what the waterheaterisequipped for.
Donotconnectthiswaterheaterto a fueltype not in accordance with the rating plate.
Carefullychoosethe locationforthenew heaterasplacement isavery importantconsiderationforthesafetyof
theoccupantsin the building andforthe mosteconomicaluseof the appliance.
Whetherreplacing anold waterheaterorputting the waterheaterin anew location, considerthe following critical
points:
Read the Safetyguidelinesin the beginningof thismanual.
Theinternalcomputercontrolled regulatorispreset bythe manufacturerandshouldnot be adjusted byuser.
Maintainproperspacearoundtheunitforservicing.Install theunitsothatitcanbeconnectedorremoved
easily.
Theelectricalconnectionrequiresameansforswitching offthe powersupply.
Avoidinstallingtheunitinanareawith high levels ofdust,sand,ordebris.Theseparticlesmayclogtheair
ventorimpairthefunctionof the fan,leadingto impropercombustion.Regularmaintenance isneeded.
Donot installtheunitwherethe exhaustventispointing into anyopening ina buildingorwhere the noisemay
disturb neighbors.
The locationselectedshouldbe ascloseto the ventterminationpointaspossible,andcentered withinthe
waterpiping system forbesthot waterdelivery.All waterheaters can leak.Donot install without adequate
drainage provisionswherewaterflow cancause propertydamage.
If ventedthrough an outsidewallorthroughtheroof using3"vent piping thetotalventruncannot exceed95
feetwith one90°elbow.If more elbowsarerequiredtheventingdistancemustbe reduced 5feet forevery90°
elbow.
Vent piping shouldslopedownwardtowardsthe unit. Horizontalrunsrequireadequate supportat 3½feet
intervalsand verticalrunssupportedat 5feet intervals.
Condensation maybecreated at timesasthe combustion gasesexit the vent cap. Discoloration of surfacesin
proximityto the vent cap mayoccur.
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UnpackingYourEternal WaterHeater
Additional SafetyInstructions
WATER HEATERPLACEMENT
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WARNING
Theapplianceshouldbelocatedinanareawhereleakageofthetankorconnectionswillnot resultindamage
tothe areaadjacentto theapplianceortolowerfloors of thestructure. Whensuchlocationscannotbe
avoided, itisrecommendedthat a suitabledrain pan be installed underthe appliance.Thepan mustnotrestrict
combustion air ow.
Theminimum inlet gaspressuremustbewithinthe value speci edbythe manufacturerand the minimumvalue
listedisonlyforthe purposeof input adjustment.
If awaterheaterisinstalledinaclosed watersupplysystem, suchasonehaving abackow preventerinthe
coldwatersupplylineandathermalexpansiontankisrequired,contactthewatersupplierorlocalplumbing
inspectoron how tocontrolthissituation.
The TemperatureandPressure(T&P)reliefvalvemustbecerti ed asmeetingtherequirement of the Standard
forRelief ValvesandAutomatic GasShut-offDevicesforHot WaterSupply SystemsANSIZ21.22/CAN1-
4.4.The valvemustbemarkedwithamaximum setpressurenot toexceedthemarkedhydrostatic working
pressureofthewaterheater(150 psi) andadischargecapacitynotless than the waterheaterinputrateas
marked ontherating plate.
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WARNING
! !
BeforeCommencingTheInstallation
Check thatitis inaccordancewithrelevantbuilding
and mechanicalcodes,aswell asanylocal,state or
federalregulations.
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CAUTION
!!
CAUTION
Thedrainvalvemust betightenedby
HandONLY, notbytoolsofanykind.

13
Condensate Disposal
Thecondensatedrainmustbe lled and unobstructed to allow owof condensate. Thecondensateshouldnot
besubjectedto conditionswherefreezing couldoccur. If the condensate is subjectedto freezing orobstruction,it
can leak,resultinginpotentialwaterdamage totheunit and surroundingarea.
The drainline materialmustbe amaterialapproved bythe authorityhavingjurisdiction. Inabsenceof such
authority,PVCandCPVCpiping mustcomplywith ASTMD1785orD2846.Thispipemustbeconnected to the
portat the side panel.Theend ofthepipe should drainto alaundrytub orto a oordrain.
Overtime, blockageofthetrapbydebrismayoccur;when the condensatecannotbereleased,theunitwillgo into
errorand willshut down. When thisoccurs,thetrap must be cleaned.
CLEANINGOUTTHETRAP
Thecondensatetrap must be lledwith waterpriorto usingthewaterheater.
Pourwaterdown theexhaustcollaruntilwatervisibly
owsout ofcondensatedrain before rst use.
Eternalwaterheaterwill typicallyproduceacondensatethatis considered slightlyacidic withaPhcontentof
approximately3-4.Installa neutralizing lterifrequired byauthorityhaving jurisdiction (See gure2).
Directto drainfromtheunit.
Drain through neutralizerfrom the unit.
Drain tolaundrytub from the unit, inthis casethe unitmust be above the height of the laundry tub.
Wheninstalling acondensatepump, ensurethe pump isapproved foruse with condensingappliance.
Thepump shouldbeequipped withanoverow switchtopreventpropertydamage from potentialcondensate
spillage.
1.
2.
3.
4.
CAUTION
Figure 2.
Figure 3.
NOTE
NOTE
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ToRemove Trap
1. Gentlypulltrap bodydownwardsto remove.
2. Remove clip securing trap tothenipple.
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Figure 1.
1/2"PVC (SCH40,ASTM-D1785)
or
3/4"CPVC (SDR11,ASTM-D2846)

14
IndoorInstallation
Clearances
From top of waterheater 12inches From back of unit 0.6inch
From front of unit 6 inches(*)From left sideof unit (gaspipingside)6 inches
From side wall ueorventconnectorinanydirection 6 inches From right sideof unit 2 inches
GU145(S)/GU195(S,M)can beusedaseitherPower-VentorDirect-Ventappliance. WhenusedasaPower-
Vent appliance, the waterheatershouldbelocated inan areawhereenough airis availableforproper
combustion andventilation.FollowthelatesteditionofANSIZ223.1 andanyofyourlocalcodesthat are
applicable.
GU145(S)/GU195(S,M)isaCategoryIVventedapplianceandmanufacturer'sventilation specificationsshould
befollowed.
In generalthese requirementsspecifythat if the unit isinstalled inaconfinedspace, theremust bepermanent air
supplyopeningsif Eternalisn't installed asDirect-Vent.
Whencombustion airissupplieddirectlythroughanoutsidewallsuchasintakelouveropeningsintothe dwelling,
eachopeningshouldgiveaminimumfreeareaofone squareinchper15,000Btu/hourof thetotalinput ratingsof
allappliancesin the enclosedarea.
Whencombustionairissuppliedfrominsidethe building,eachopeningshouldgiveaminimumfreeareaof one
squareinchper3,750Btu/hourof the totalinputratingsofall appliancesintheenclosed area.Theseopenings
shouldneverbe lessthan40sq.in.
Theminimumrequiredinsideairvolume shouldbe50 cu.ft perevery 3,750 Btu/hour.
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CombustionAirSupply
Airsupplyfrom outsidebuilding:
Airsupplyfrom insidebuilding:
Minimum RecommendedAirSupplyToWaterHeateras Power-Vent
Model# WaterHeaterCapacity OutsideAirArea Inside AirArea
GU195 (S,M) Max.195,000 Btu/hour 14sq.in. 54sq.in.
GU145 (S) Max.145,000 Btu/hour 10sq.in. 40sq.in.
Model# WaterHeaterCapacity Minimum Required AirVolume
GU195 (S,M) Max.195,000 Btu/hour 2649 cu.ft
GU145 (S) Max.145,000 Btu/hour 1932 cu.ft
Naturalgasin high altitude mightcontainless heating valuethan typical1100 BTU/ cuft andthereforecan cause
improperair/gasmixleadingto impropercombustion.Fornaturalgasinstallationsinaltitudesabove 3,000 feet,
besure toapplythe intakeori ce (P/N 152140230)providedbymanufacturerin the accessorybox.
WARNING - high elevation installations
! !
AirVents
Heater
AirVents
Heater
*Foraccessibilitywhen performingmaintenance, 24"clearance in front oftheunit it isrecommended.

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Outdoor Installation
Clearances
From top of waterheater 24inches From back of unit 0.6inch
From front of unit 24inches From left sideof unit (gaspipingside)6 inches
From side wall ueorventconnectorinanydirection 6 inches From right sideof unit 2 inches
If thisunitisinstalledunderan overhang,theremustbe a24"clearancefromthe topof theunitto theoverhang,
and the surrounding area must beopen infront and on the sidesoftheunit.
Foroutdoorinstallation, donotremovethevent capfromthetopoftheappliance. Locatethe waterheaterinan
open,unroofedarea, and maintain the above minimum clearancesfrom combustible materials.
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ExhaustVentilation
Donothavethe ue terminalpointingtowardanopeningintothebuilding. Do notlocateyourheaterinapitor
anylocationwhere gasandwatercan accumulate.
WARNING
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Donot installthewaterheaterwherewater,debrisor ammablevaporsmayget into the ueterminal.Thismay
causedamageto the waterheater.
WARNING
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Min. 4ft
Naturalgasinhigh altitude might containlessheating valuethan typical1100 BTU/ cuftand thereforecan
causeimproperair/gasmixleadingtoimpropercombustion.Fornaturalgasinstallationsinaltitudesabove
3,000feet, besure toapplythe intakeori ce (P/N 152140230)providedbymanufacturerin the accessorybox.
Dipswitchsettingforhighaltitude is different tosealevelinstallation, Pleasecall1-866-946-1096to speakto a
service technicanforpropercon guration.
WARNING - high elevation installations
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16
MobileHome Installation
Read and Review thisentire Manualwith specialemphasison combustion and ventilation foryoursafety.
If you do not follow theseinstructionsexactly,a reorexplosion couldresultcausing propertydamage, personalinjury
orlossof life.
Eternalwaterheatermustbeused asasealed combustion type (DirectVent)whereallthe combustion airissupplied
fromthe outdoorsthrough the airintakeand allcombusted gasbyproductisvented directlyto theoutside bymeansof
the vent termination.
MOBILEHOME(Manufactured Home).
This appliancemustbe installed inaccordancewith the Manufactured HomeConstruction And SafetyStandard,(Title24,
CFR;Part 3280). In addition, installin accordance with the following instructions, the instructionssupplied with the venting
termination, localcodes,utilitycompanyrequirementsforthe installation of waterheatersin manufactured homes(mobile
homes).In the absenceof suchastandard, the waterheatershouldbe installed inaccordancewith the latestedition of
the NationalFuelGasCode, ANSI Z223.1/NFPA54 and ANSIA119.5/NFPA501D.
Mounting Steps
1. Installmounting bracketswith 6 screwson top and bottombackof the unit.
PhilipsHead Screws
1/4"x3/8"
PhilipsHead Screws
1/4"x3/8"
Wall mountthe waterheaterwith the bracketsprovided
The waterheatermust be properlysupported; if the wallisnot strong enough, be sure to reinforce the wall.
The unit must be mounted on a verticalwalland levelto the ground.
Wallmount maycaused noisesand vibration to magnifythrough the wall;carefullyselectwhereto mount theunitis
important. In some cases, oormount should be considered.
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Selectalocation onthe wall tomount the unit. The included wall bracket hasbeenpre-drilled foreasy installation on
standardwall studs.If the framing is not standardorinstalling on an uneven surface, fasten3/4" plywood to the stud
walland then attach the wall bracket.
2.
1/4"x1 ½"Screws
Hang the unit on the mounted wallbracket and secure bottomof the unit to the wallwith included wallanchorsand wall
screws.
3.
1/4"x1 ½"Screws
WARNING
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WARNING
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Wall Mounting ForCommercialFood Service
PerANSI / NSF-5, the unit must be mounted at least 6" above the oorfromthe base of the unit.
This mounting clearanceprovidesaccessforclearing anypossibledebrisoraccumulated waterseepage that can occur
below the unit.
6"

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MobileHome Installation
Allprimers,cleanersand cementsmust meet alllocalcodesand applicable standardsof the American SocietyforTesting
Materials(ASTM).
Cementing PVC, ABSorCPVC PIPEand FITTING
The appliance must be vented separatelyfromallotherappliances.The following type of non-metallicvent can be used:
VentPipeMaterial
PVC (schedule 40, ASTM-D1785)CPVC (schedule 40, ASTM-D2846)
PVC-DWV (ANSI/ASTM-D2665)ABS (schedule 40, ASTM-D2661)
Polypropylene Pipe Single wall &Components(ULC-S636, UL-1738)
Note : Do not use cellularfoamcore pipe.
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Propermaterial forIntakeand Exhaustvent
Gas leakbeconducted forsupplypressures above1/2psig.
To install the properventing forthewaterheaterin aMobile Home (Manufactured Home)
This waterheatermust be properlyvented forremovalof exhaust gasesto the outside of the home. Correctinstallation
of the vent pipe systemismandatoryforthe safe and ef cient operation of thiswaterheaterand isan important factor
in the life of the unit.
WARNING
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VerticalTermination
Belowdiagrams areexamplesofvertical terminations.
Throughroof(Direct Vent) Throughroof(Concentric Vent)
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Anopen tee is optionalbut recommended
touseasaterminationtoalleviateand
preventbackpressureinthe venting
system.
The Grand Hallapproved concentric
kitis auniquepipe-in-pipeventing
systemdesigned fortermination.Do
not trytoreplicateormakeyourown.
Formoreinformation,pleasereferto
Concentric Vent Kit section inthe
Operation manual.
WARNING
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Throughroof(Power Vent)
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WARNING
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Pipesmustterminateaminimum
oftwelve(12)inchesabove
anticipated snowlevel.
Itcannotbe connectedtoexisting
ventpiping or chimney.
The total vertical and horizontal
runscannotexceed themaximum
lengthwithamaximumnumber of
90degreeelbowsasspeci edin
the table ofpage22.
Eternalcanbeventedstraight
up andahorizontalsectionisnot
required for vertical terminations.
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HorizontalTermination
SideWall (DirectVent)
SideWall (ConcentricVent)
SideWall (Power Vent)
Belowdiagrams areexamplesofvertical terminations.
The Grand Hall approved
concentrickitisauniquepipe-
in-pipeventingsystemdesigned
for termination.Donottryto
replicateormakeyourown.For
more information,pleaserefer to
ConcentricVentKit sectionin the
Operation manual.
WARNING
!
Anopentee isoptionalbut
recommended touse as
atermination toalleviate
andprevent backpressure
intheventingsystem.
Foroptimalresultsthe
open teeshouldbe
positioned vertically.
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WARNING
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Oncethe ventterminallocationhasbeen determined,makeahole
throughtheexterior wall toaccommodatethe ventpipe.Ventpipe must
onlyexitexterior wall horizontally.
Placethe 1/2"metalmeshscreeninside theterminal ttingandconnect
itas showntotheventpipeonthe exterior ofthe building.
Sealanyopeningaroundtheventpipeor ttingswithmortar or silicone
caulk"asshown" above.
Completetherestofthe ventpipe installation tothe water heater'svent
connector tting on theblower outlet.
Ifnecessarysupporthorizontal runas previouslymentioned.
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Percode, waterheatersmustbe installed withasealedcombustion design soastoseparate the waterheater's
combustionandventingsystemfromtheinterioratmosphereofthemanufacturedhome.In accordancewithcode-water
heatersmust be directvented. Pleasereferto direct ventinginstructionsanddiagramsonpage 23-24.

MobileHome Installation
Howto convert to LP
1. Remove front panelbyloosening 5 screws.
2. Locate the gasvalve towardslowerleft of the unit.
3. Loosen nut connecting gastube to gasvalve.
4. InsertLPorificeinto thenozzle, retightengastube
and make sure no gasleak.
Screws
5.
Priortostart up, ensuretheunitisset to re propane.
Checkthe rating labelforthetypeoffuel.If thereis a
conictordoubt onthesetup,removethegasvalve
andcheck forthepropane ori ce. Failuretoensure
propersetupcouldresultinseverepersonalinjury,
deathorsubstantialpropertydamage.
WARNING
! !
GasValve
LPlabel
Nut
Reassemblethe front paneland applythe LPlabelwhich
isin the accessorykit.
Gas Tube
LPOri ce
To convert backfromLPto Natural Gas
AllEternalmodelscomefactorypre-con gured asNatural
gas,Howeverifthewaterheaterhasbeen convertedto
LPand needsto be converted backto Naturalgas,follow
steps1, 2, 3 and remove the LPori ce and the LPLabel.
18
Adjust the propane supplyregulatorprovided bythe gassupplierfor13" w.c. maximumpressure.
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Contact the localpropane gassupplierforrecommendedsizing of piping, tanksand 100%lockup gasregulator.
NOTE
! !
LPconversionkit(LPOrifice,PROPANE GAS Label)mustbeorderedfromGrand HallUSA. Conversioncanonlybe
completed byaqualified professional.
NOTE
! !
To convert aUnitfromNatural gasto LPorLPto Natural gas
Clearances
Fromtop of waterheater 12 inches Frombackof unit 0.6 inch
Fromfront of unit 6 inches(*)Fromleft sideof unit (gaspiping side) 6 inches
Fromside wall ue orvent connectorin anydirection 6 inches Fromright side of unit 2 inches
*Foraccessibilitywhen performing maintenance, 24" clearance in front ofthe unit it isrecommended.
LOCATIONforMOBILEHOME(Manufactured Home).
"MUSTBE INSTALLED UNDER DIRECTVENTONLY"
Placement of WaterHeater:Locate the waterheaterasdesired, makecertainthe minimumclearancesaremaintained.
Forindoorand outdoorinstallation follow entire Eternaloperation manual, please see section above on mobile home.
"Wheninstalling ina garage, the heater's ignition source shouldbe elevatedno lessthe 18"fromthe oor."
This operation Manualshould be kept bythe unit afterinstallation.

19
Wall Mounting
MountingSteps
1. Installmounting bracketswith6 screwsontopandbottomback of the unit.
Wall MountingForCommercial FoodService
PerANSI / NSF-5, the unitmustbe mountedat least6"abovethe oorfromthebaseof the unit.
Thismountingclearanceprovidesaccessforclearinganypossibledebrisoraccumulatedwaterseepagethatcan
occurbelowtheunit.
Selecta location on the wallto mount the unit.The includedwallbrackethasbeenpre-drilled foreasy installation
onstandardwallstuds.If the framing isnot standardorinstallingonanunevensurface,fasten3/4"plywoodto
thestudwalland thenattach the wallbracket.
2.
1/4"x1 ½"Screws
6"
PhilipsHead Screws
1/4"x3/8"
PhilipsHead Screws
1/4"x3/8"
Hang the uniton the mountedwallbracketandsecurebottomof theunitto the wallwithincludedwallanchors
and wallscrews.
3.
1/4"x1 ½"Screws
Thewaterheatermust beproperlysupported; ifthewallis notstrong enough, besureto reinforcethewall.
Theunit must bemounted on a verticalwalland leveltotheground.
Wallmount maycaused noisesandvibrationto magnifythroughthe wall;carefullyselectwhereto mountthe
unitisimportant. In some cases, oormount shouldbeconsidered.
WARNING
! !
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20
FloorMounting
GU145(S)/ GU195(S,M)canbeinstalledstandingoncombustiblefloorsurface, oron awaterheaterstand.
Be sureto usea suitable drainingpan undertheunitifleakageof thetankorconnectionswillresuit in damageto
theareaadjacent totheappliance.
Place unitdirectlyon aneven surface.Factoryinstalledrubberfeet canbe adjusted if thesurface isslightly uneven.
Secure the unittothe wall withincludedwallmount bracket. Besuretoinstall the wall mountbracket tothewallstuds.
PerANSI/NSF-5,floorstandingdirectlyonthehardsurfaceisNOTanacceptableinstallationmethod.Theunit
mustbeelevatedat least6"offthe floor. Thismountingclearanceprovidesaccessforclearinganypossibledebris
oraccumulated waterseepage that canoccurbelow theunit. InstalltheunitonEternalWaterHeaterStand(P/N
314080136)that raisesthe unit atleast 6"above the floor.
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StandingInstallation
FloorStanding
Earthquake Proong
WaterHeaterStand ForCommercial Food Service
6"min
Factory Installed RubberFeet
Iflocalcodesrequirethe waterheatertoberaised18"above oor,installingGU145(S)/GU195(S,M)onthe
optionalEternalWaterHeaterStand(P/N314080136)willsatisfycode. Inconjunction, the uniton stand raises
theFVIR compliant igniterand burnerat least18"off the oor.Alternatively, raising the unit at least6"off the oor
willalsosatisfycode.
CAUTION
! !
PhilipsHead Screws
M8x15x4pcs