- Instruction Manual Residential Gas Water Heater

31
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
inexpensive devices that attach to faucets to limit hot water
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 switch activate, the control 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long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
 valve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,shall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
instructionsforinstallationofthevalves.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 AUTOMATIC DISHWASHER 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.