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Thewatertemperature is controlled using the Temperature
Controlonthe Displayatthe frontofthe unit(SeeFigure 1).
Thiscontrolutilizesatemperatureprobetodeterminethetank
temperature.Theprimarytemperature probeislocated atthe
topofthetank.
Thetemperaturemaybeadjustedfrom90°F/32°Cto160°F/71°C.
Thethermostatwasadjustedto 120°F/49°Cbeforetheheater
wasshippedfromthefactory.Itisrecommendedthatlowerwater
temperaturebeusedto avoidtheriskof scalding.Itisfurther
recommended,inallcases, thatthewatertemperaturebe set
forthelowesttemperaturewhichsatisfiesyourhotwaterneeds.
Thiswillalsoprovidethemostenergyefficientoperationofthe
waterheaterandminimizescaleformation.
Valvesforreducingthepoint-of-usetemperaturebymixingcold
andhotwater are available, see Figure 2. Also available are
inexpensi ve dev ices th at att ach to  fauce ts to l imit h ot wat er
temperatures.Contactalicensedplumberorthelocalplumbing
authority.
Thetablebelowshowstheapproximatetime-to-burnrelationshipfor
normaladultskin.Shortrepeated heatingcyclescausedbysmall
hotwaterusescancausetemperaturesatthepointofusetoexceed
thethermostatsetting byupto 20°F/11°C.Ifyouexperience this
typeofuse,youshouldconsiderusinglowertemperaturesettings
toreducescaldhazards.
160°F(71°C) About1/2Second
 150°F(65°C) About11/2Seconds
 140°F(60°C) Lessthan5Seconds
 130°F(54°C) Morethan30Seconds
 120°F(49°C) Morethan5minutes
HI LIMIT SWITCH (E.C.O.)
Thetopimmersionwellofthedualbulbcontrolleralsocontains
thehigh
limit(energycutoff) sensor. The high limit switch
interruptsmainburner
gasflowshouldwatertemperaturereach
approximately202°F/94°C.
Shouldthe high limit swi tch activate, the cont rol system will
automaticallyresettheunit oncethewatertemperature inthe
tankfallsbelow140°F/60°C. Iftheunitismanually shutdown
andrestarted,aslo ngasthetemperature inthetankislower
than160°F/71°C,theunitwillresetandinitiateoperation.
Ifyouexperiencehigherthanusualwatertemperaturealongwith
frequentautomaticresettingofthesystem,thisisevidenceofhigh
limitswitchoperation.Thefollowingarepossiblereasonsforhigh
limitswitchoperation.
• Amalfunctioninthethermostaticcontrolswouldallowthegas
controlvalvethermostat to remain open causing water
temperaturetoexceed the thermostat setting. The water
temperaturewouldcontinue to rise until high limit
 switchoperation.
Contactyourdealer or servicer if continued high limit switch
operationoccurs.
teMperature reGulatIon
time to produce
2nd & 3rd Degree
temperature setting Burns on adult skin
Itisrecommendedthatlowerwatertemperaturesbeusedtoavoid
theriskofscalding.Itisfurtherrecommended,inallcases,thatthe
watertemperaturesbesetforthelowesttemperaturewhichsatises
yourhotwaterneeds.Thiswillalsoprovidethemostenergyefcient
operationofthewaterheater.
HOT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,andothersanitizingneeds
canscaldandpermanentlyinjureyouuponcontact.Somepeople
aremorelikelytobepermanentlyinjuredbyhotwaterthanothers.
Theseincludetheelderly,children,theinrm,orphysically/mentally
handicapped.Ifanyone using hot water from this heater ts into
oneofthesegroupsorifthereisalocalcodeorstatelawrequiring
acertaintemperature water at the hot water tap, then you must
takespecialprecautions. Inadditionto usingthelowestpossible
temperaturesettingthatsatises yourhotwater needs,ameans
suchasamixingvalve,shouldbeusedatthehotwatertapsused
bythesepeopleoratthewaterheater.Mixingvalvesareavailable
atplumbingsupply or hardware stores, see Figure 2. Follow
manufacturer’sin structions for inst allation of the valv es. Before
changingthefactorysettingonthethermostat,readthe“Temperature
Regulation”sectioninthismanual.
Neverallowsmallchildrentouseahotwatertap,ortodrawtheirown
bathwater.Neverleaveachildorhandicappedpersonunattended
in a bathtub or shower.
Thewaterheatershouldbelocatedinanareawherethegeneral
publicdoesnothaveaccess.Ifasuitablearea isnotavailable,
acovershould be installed over the thermostat to prevent
tampering.Thewater temperature setting was factory set at
thelowesttemperature;THIS WATERHEATERISEQUIPPED
WITH AN ADJUSTABLE THERMOSTAT TO CONTROL WATER
TEMPERATURE. HOT WATER TEMPERATURES REQUIRED
FOR AUTO MATIC DI SHWASHER AND LAUNDRY USE CAN
CAUSE SCALD BURNS RESULTING IN SERIOUS PERSONAL
INJURYAND/ORDEATH.THE TEMPERATUREAT WHICH
INJURYOCCURSVARIESWITHTHEPERSON’SAGEANDTHE
TIME OF THE EXPOSURE. THE SLOWER RESPONSE TIME
OF CHILDREN, AGED OR DISABLED PERSONS INCREASES
THE HAZARDS TO THEM. NEVER ALLOW SMALL CHILDREN
TO USE A HOT WATER TAP, OR TO DRAW THEIR OWN BATH
WATER. NEVER LEAVE A CHILD OR DISABLED PERSON
UNATTENDED IN A BATHTUB OR SHOWER.
THE WATER HEATER SHOULD BE LOCATED IN AN AREA
WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS TO
SET TEMPERATURES.
SETTINGTHEWATERHEATERTEMPERATUREAT120°F/49°C
WILLREDUCETHE RISK OF SCALDS. Some states require
settingsatspecificlowertemperatures.