Giant UG40-92TFTT-N2U Specification sheet

— Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
Do not touch any electrical switch; do not use any phone in your building.
If you cannot reach your gas supplier, call the fire department.
—
may result causing property damage, personal injury or death.
WARNING
READ ALL OF THE INSTRUCTIONS THOROUGHLY BEFORE INSTALLING OR OPERATING THIS WATER HEATER.
safety
-30.
performed.
UG40-92TFTT-N2U (Natural Gas)
UG40-92TFTT-P2U (Propane)
Water Heater
FOR INDOOR APPLICATIONS ONLY
ANS Z21.10.3
CSA 4.3
Hybrid Tank-Tankless Water Heater
54000052 GI-IM046En-0713
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•
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2GiantManual

TableofContents
Thisisthesafetyalertsymbol.Thissymbolalertsyoutopotenalhazardsthatcankillorhurtyou
andothers.
Indicatesanimminentlyhazardoussituaonwhich,ifnotavoided,willresultinserious
injuryordeath.
Indicatesapotenallyhazardoussituaonwhich,ifnotavoided,couldresultinserious
injuryordeath.
Indicatesapotenallyhazardoussituaonwhich,ifnotavoided,couldresultinminoror
moderateinjury.Itmayalsobeusedtoalertagainstunsafepracces.
DANGER
CAUTION
WARNING
SafetyDefinions
NOTICE:Giantsomemessharescustomercontactinformaonwithbusinessesthatwebelieveprovide
productsorservicesthatmaybeusefultoyou.Byprovidingthisinformaon,youagreethatwecan
shareyourcontactinformaonforthispurpose.Ifyouprefernottohaveyourinformaonsharedwith
thesebusinesses,pleasecontactcustomerserviceandasknottohaveyourinformaonshared.We
willhowever,connuetocontactyouwithinformaonrelevanttotheproduct(s)youregisteredand/
oryouaccountwithus.IfyouhaveanyquesonsorfeelthatthemanualisincompletecontactGiant
at1‐800‐363‐9354.
SafetyDefinions..............................................2
SafetyBehaviorsandPracces
fortheConsumerandInstaller.......................3‐5
InstallaonInstrucons
InstallerQualificaons.....................................6
GeneralInstrucons.........................................6
DetermineInstallaonLocaon......................8
TypicalInstallaonIllustraon.........................9
InstallaonLocaon.......................................11
ChecklisttoDetermineInstallaonLocaon.12
CombusonAirRequirements.................13‐15
VenngRequirements.............................16‐19
ChecklistforCombusonAir
andVenngRequirements............................20
InstallaonofPlumbing.................................21
ChecklistforPlumbing...................................22
Massachuses‐RequiredPlumbing...............23
InstallaonofGasSupply.........................24‐25
ConnectElectricity.........................................26
AdjustforHighAltude.................................26
ChecklistforGasandElectricity.....................26
FinalChecklist................................................27
TechnicalData
Specificaons.................................................28
Dimensions....................................................29
WireDiagram.................................................30
PartsBreakdown............................................31
Operaon
ConsumerOperaonGuidelines
fortheSafeOperaonof
yourWaterHeater.........................................32
HowtousetheTemperatureController.......33
DiagnoscCodesandRemedies...............35‐36
SystemMaintenance
AirScreen.......................................................37
WaterFilter....................................................38
RequiredMaintenance...............................39‐40
ConsumerSupport
WarrantyRegistraonInformaon...............41
LimitedWarranty......................................41‐43

GiantManual3

CAUTION
 BURNHAZARD.Hotexhaustandventmaycause
seriousburns.Keepawayfromwaterheaterunit.
Keepsmallchildrenandanimalsawayfromunit.
 Hotwateroutletpipesleavingtheunitcanbehot
totouch.Inresidenalapplicaons,insulaon
mustbeusedforhotwaterpipesbelow36”(914
mm)duetoburnrisktochildren.
Californialawrequiresthisnocetobeprovided:
California ProposiƟon 65 listschemicalsubstancesknowntothestatetocausecancer,birthdefects,death,
seriousillnessorotherreproducveharm.Thisproductmaycontainsuchsubstances,betheiroriginfromfuel
combuson(gas,oil)orcomponentsoftheproductitself.
Safety Behaviors and PracƟces for the Consumer and Installer
 Beforeoperang,smellallaroundtheappliance
areaforgas.Besuretosmellnexttothefloor
becausesomegasisheavierthanairandwillsele
onthefloor.
 Keeptheareaaroundtheapplianceclearandfree
fromcombusblematerials,gasoline,andother
flammablevaporsandliquids.
 Combusbleconstruconreferstoadjacentwalls
andceilingandshouldnotbeconfusedwith
combusbleorflammableproductsandmaterials.
Combusbleand/orflammableproductsand
materialsshouldneverbestoredinthevicinityof
thisoranygasappliance.
 Alwayscheckthewatertemperaturebefore
enteringashowerorbath.
 Toprotectyourselffromharm,beforeperforming
maintenance:
 Turnofftheelectricalpowersupplyby
unpluggingthepowercordorbyturningoffthe
electricityatthecircuitbreaker.(The
temperaturecontrollerdoesnotcontrolthe
electricalpower.)
 Turnoffthegasatthemanualgasvalve,usually
locatedadjacenttothewaterheater.
 Turnofftheincomingwatersupply.Thiscanbe
doneatthecoldwatersupplyvalve
immediatelybelowthewaterheaterorby
turningoffthewatersupplytothebuilding.
WARNING

 Useonlyyourhandtopushinorturnthegas
controlknob.Neverusetools.Iftheknobwillnot
pushinorturnbyhand,donottrytorepairit;calla
licensedprofessional.Forceoraemptedrepair
mayresultinafireorexplosion.
 Donotusethisapplianceifanyparthasbeenunder
water.Immediatelycallalicensedprofessionalto
inspecttheapplianceandtoreplaceanypartofthe
controlsystemandanygascontrolwhichhasbeen
underwater.
 Donotusesubstutepartsthatarenotauthorized
forthisappliance.
 Shouldoverheangoccurorthegassupplyfailto
shutoff,turnoffthemanualgascontrolvalvetothe
appliance.
 DonotadjusttheDIPswitchunlessspecifically
instructedtodoso.
 Donotuseanextensioncordoranadapterplug
withthisappliance.
 Anyalteraontotheapplianceoritscontrolscanbe
dangerousandwillvoidthewarranty.
 Makesurethewaterheateranditswaterlinesare
protectedfromfreezing.Damageduetofreezingis
notcoveredbythewarranty.

4GiantManual

WARNING

 Donotusethisapplianceifanyparthasbeen
underwater.Immediatelycallaqualifiedservice
techniciantoinspecttheapplianceandtoreplace
anypartofthecontrolsystemandanygascontrol
whichhasbeenunderwater.
 Anyalteraontotheapplianceoritscontrolscan
bedangerousandwillvoidthewarranty.
 Thisapplianceisequippedwithathree‐prongplug
foryourproteconagainstshockhazardand
shouldbepluggeddirectlyintoaproperly
groundedthree‐prongreceptacle.Donotcutor
removethegroundprongfromthisplug.

ForYourSafety
Donotstoreorusegasolineorother
flammablevaporsandliquidsinthe
vicinityofthisoranyotherappliances.
Storageoforuseofgasolineorother
flammablevaporsorliquidsinthevicinity
ofthisoranyotherappliancecanresultin
seriousinjuryordeath.
FLAMMABLE
FlammableVapors
WARNING
DANGERHotwatercanbedangerous,especiallyforinfantsorchildren,theelderly,
orinfirm.Thereishotwaterscaldpotenalifthethermostatissettoo
high.
Watertemperaturesover125ºF(51ºC)cancausesevereburnsor
scaldingresulngindeath.
Hotwatercancausefirstdegreeburnswithexposureforaslileas:
3secondsat140ºF(60ºC)
20secondsat130ºF(54ºC)
8minutesat120ºF(48ºC)
Testthetemperatureofthewaterbeforeplacingachildinthebathor
shower.
SafetyBehaviorsandPraccesfortheConsumerandInstaller

GiantManual5

SafetyBehaviorsandPraccesfortheConsumerandInstaller
FVIR(FlammableVaporIgnionResistant)Sensor
Flammableliquidssuchascleaningsolvents,aerosols,paintthinners,adhesives,gasolineandpropanemustbe
handledandstoredwithextremecare.Theseflammableliquidsemitflammablevaporsandwhenexposedtoan
ignionsourcecanresultinafirehazardorexplosion.Flammableliquidsshouldnotbeusedorstoredinthe
vicinityofthisoranyotherappliance.
ThiswaterheaterisequippedwithaflammablevaporsensorandmeetstherequirementsofANSIZ21.10.1If
flammablevaporsaredetected,theflammablevaporsensorwillclosethegassupplytothewaterheater,the
ignionsourcewillbedisabledandan“FE”errorcodewillflashonthecontroller.Ifthecontrollerisflashingan
“FE”orifflammablevaporsaresuspected:
 Leavetheareaimmediately,leavingtheexitpointopentoallowvenlaon
 Donottouchanyelectricdevice(includingphoneorlightswitch)
 Callemergencypersonnelfromaneighborsphone
 Donottrytoresetthewaterheaterorlightthepilottoanyotherappliance.Whensafetypersonnelhasidenfied
theareaassafeandallflammablevaporshavebeenremovedandeliminatedfromthearea,theunitscanbe
resetbyunpluggingtheunitthenpluggingbackin.
Donotsprayorusechemicalscontainingbleach,cleaners,polish,silicone,phosphorous,orlubricantsnearthe
waterheater.Thesechemicalswilldamagetheflammablevaporsensor.Nevercleanortamperwiththe
flammablevaporsensor.Donotplacecatlierneartheapplianceasitcancorrodeordamagethesensor.If
thesensoriscorrodedordamageditsreaconmecanbeaffectedanditmaynotreactasdescribed.
WARNING
Installventsystemperlocalandnaonalcodes.
Readandfollowallinstruconsinthissecon.
Donotinstallthiswaterheaterabove5,400(1,646m).
Donotobstructwaterheaterairintake.
Donotoperatewaterheaterifflooddamaged.
Failuretoproperlyventthisappliancecanresultindeath,personal
injuryand/orpropertydamage.
Everyhomeshouldhaveacarbonmonoxide(CO)alarminthehall‐
waynearbedroomsineachsleepingarea.Checkbaeriesmonthly
andreplacethemannually.
WARNINGCarbonMonoxideHazard

6GiantManual

Alicensedprofessionalmustinstalltheappliance,
inspectit,andleaktestitbeforeuse.Thewarranty
willbevoidedduetoimproperinstallation.
Theinstallershouldhaveskillssuchas:
 gassizing
 connectinggaslines,waterlines,valves,and
electricity
 knowledgeofapplicablenational,state,and
localcodes
 installingventingthroughawallorroof
 VentingCategoryI,FanAssistAppliancesper
NFPA54andlocalcodes
Ifyoulacktheseskillscontactalicensedprofessional.
InstallationInstructions
InstallationSteps
DetermineInstallationLocation................8
TypicalInstallationIllustration..................9
InstallationLocation................................11
ChecklisttoDetermine
InstallationLocation................................12
CombustionAirRequirements...........13‐15
VentingRequirements........................16‐19
ChecklistforCombustionAir
andVentingRequirements......................20
InstallationofPlumbing...........................21
ChecklistforPlumbing.............................22
Massachusetts‐RequiredPlumbing.........23
InstallationofGasSupply...................24‐25
ConnectElectricity...................................26
AdjustforHighAltitude...........................26
ChecklistforGasandElectricity..............26
FinalChecklist..........................................27
GeneralInstructionsInstallerQualifications
DONOT
 DonotinstalltheUG40‐92TFTT‐N2UorUG40‐
92TFTT‐P2Uoutdoors.
 Donotinstalltheapplianceinanareawherewater
leakageoftheunitorconnectionswillresultin
damagetotheareaadjacenttotheapplianceorto
lowerfloorsofthestructure.Whensuchlocations
cannotbeavoided,itisrecommendedthata
suitabledrainpan,adequatelydrained,beinstalled
undertheappliance.Thepanmustnotrestrict
combustionairflow.
 Donotobstructtheflowofcombustionand
ventilationair.
 Donotusethisapplianceinanapplicationsuchas
apoolorspaheaterthatuseschemicallytreated
water.(Thisapplianceissuitableforfillinglargeor
whirlpoolspatubswithpotablewater.)
 Donotusesubstitutepartsthatarenotauthorized
forthisappliance.
MUSTDO
 Theinstallationmustconformwithlocalcodesor,
intheabsenceoflocalcodes,withtheNational
FuelGasCode,ANSIZ223.1/NFPA54,orthe
NaturalGasandPropaneInstallationCode,CSA
B149.1.
 Theappliance,wheninstalled,mustbeelectrically
groundedinaccordancewithlocalcodesor,inthe
absenceoflocalcodes,withtheNationalElectrical
Code,ANSI/NFPA70,ortheCanadianElectrical
Code,CSAC22.1.
 Theapplianceanditsappliancemaingasvalve
mustbedisconnectedfromthegassupplypiping
systemduringanypressuretestingofthatsystem
attestpressuresinexcessof1/2psi(3.5kPa)
(13.84inW.C.).
 Theappliancemustbeisolatedfromthegassupply
pipingsystembyclosingitsindividualmanual
shutoffvalveduringanypressuretestingofthegas
supplypipingsystemattestpressuresequaltoor
lessthan1/2psi(3.5kPa)(13.84inW.C.).

GiantManual7

Prepare for installaƟon
Partsincluded
Toolsneeded
Materialsneeded
 Makesurethewaterheateranditswaterlinesare
protectedfromfreezing.Damageduetofreezingis
notcoveredbythewarranty.
 Youmustfollowtheinstallaoninstruconsand
thoseinCareandMaintenanceforadequate
combusonairintakeandexhaust.
 Installthevacuumreliefvalveperlocalcodes.
 Massachuses248CMRSecon10.14(I)“All
potablewaterpressuretanksshallbeprovided
withavacuumreliefvalveatthetopofthetank
thatwilloperateuptoamaximumwaterpressure
of200P.S.I.G.andtoamaximumwater
temperatureof200ºF(93.3oC).”



INFORMATION
 Ifawaterheaterisinstalledinaclosedwater
supplysystem,suchasonehavingabackflow
preventerinthecoldwatersupplyline,means
shallbeprovidedtocontrolthermalexpansion.
Contactthewatersupplierorlocalplumbing
inspectoronhowtocontrolthermalexpansion.
 Shouldoverheangoccurorthegassupplyfailto
shutoff,turnoffthemanualgascontrolvalveto
theappliance.
 Keeptheairintakelocaonfreeofchemicalssuch
aschlorineorbleachthatproducefumes.These
fumescandamagecomponentsandreducethelife
ofyourappliance.
Waterheater
Temperature‐PressureRelief(T&P)Valve
GasValve
Manometer
Pipewrenches(2)
Adjustablepliers
Screwdrivers(2)
Wirecuers
Gloves
Safetyglasses
Level

Toolsthatmightbeneeded
Saw
Threadingmachinewith
headsandoiler
Torchset
Coppertubingcuer
Steelpipecuer
Materialsthatmaybeneeded
Soapsoluon
Approvedvenng
Teflontape
(recommended)orpipe
compound
Heattape
Pipeinsulaon
Electricalwireand
conduitperlocalcode
Singlegangelectrical
box
Wirenuts
Unionsanddrainvalves
Vacuum Relief Valve
(NotSupplied)
Ifrequired,installperlocalcodeand
valvemanufacturersinstrucons

8Giant Manual
Environment
Air surrounding the water heater is used for
combuson and must be free of any compounds that
cause corrosion of internal components. These
include corrosive compounds that are found in
aerosol sprays, detergents, bleaches, cleaning
solvents, oil based paints/ varnishes, and refrigerants.
The air in beauty shops, dry cleaning stores, photo
processing labs, and storage areas for pool supplies
oen contains these compounds. Therefore it is
recommended that such locaons be avoided.
If it is necessary for a water heater to be located in
areas which may contain corrosive compounds, the
following instrucons are strongly recommended.
IMPORTANT CONSIDERATIONS FOR INSTALLATION:
 DO NOT Install in areas where air for combuson
can be contaminated with chemicals.
 Before installaon, consider where air has the
ability to travel within the building to the water
heater.
 Chemicals that are corrosive in nature should not
be stored or used near the water heater.
Damage and repair due to corrosive compounds in
the air is not covered by warranty.
Consideraon of care for your water heater should
include evaluaon of water quality.
Water that contains chemicals exceeding the levels
below aect and damage the heat exchanger.
Replacement of the heat exchanger due to water
quality damage is not covered by the warranty.
Maximum Level
Total Hardness Up to 200 mg / L
Aluminum * Up to 0.2 mg / L
Chlorides * Up to 250 mg / L
Copper * Up to 1.0 mg / L
Iron * Up to 0.3 mg / L
Manganese * Up to 0.05 mg / L
pH * 6.5 to 8.5
TDS (Total Dissolved Solids) * Up to 500 mg / L
Zinc * Up to 5 mg / L
Determine Installaon Locaon
Water Quality
* Source: Part 143 Naonal Secondary Drinking Water
Regulaons
If you install this water heater in an area that is
known to have hard water or that causes scale build-
up the water must be treated and/or the heat
exchanger ushed regularly.
You must ensure that clearances will be met and that
the vent length will be within required limits.
Consider the installaon environment, water quality,
and need for freeze protecon. Requirements for the
gas line, water lines, and electrical connecon can be
found in their respecve installaon secons of this
manual.

GiantManual9

MinimumClearances
Theminimumclearancesfrombothcombusblesandnon‐combusblesconstruconis:
0inchesfromthesides
0inchesfromtheback
12inches(300mm)fromthetop
4inches(102mm)fromthefront
0”Min0”Min
0”Min
4”Min
12”Min





10GiantManual

AHotWaterOutlet
BHotWaterOutletValve
CTemperature&Pressure‐Relief
Valve
DColdandHotUnions
EColdWaterSupplyValve
FColdWaterSupply
GThermalExpansionTank
H4”(102mm)B‐Vent
ICombusonAirScreen
JOperaonUnit/Temperature
Control
KOutletReceptacle
LDrainPan
MTemperature&Pressure‐Relief
ValveDischargePipe
(donotcap,plug,orreduce)
NDripLeg(SedimentTrap)
OGasUnion
PGasControlValve
QThermostacMixingValve
RNon‐TemperedReturnLine
SNon‐TemperedSupplyLine
*
*

*
*
*
*
*


*
*
*
*
*

*
*
*
TypicalInstallaons
*FieldSupplied
ABD
C
EF
H
P
O
N
J
I
K
G
M
L
S
F
R
QA
MIXINGVALVEINSTALLATION
RETURN
SUPPLY
COLDWATER
SUPPLY
NON‐TEMPERED
SUPPLY
COLDWATER
SUPPLY
HOTWATER
OUTLET