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Installation Instructions (cont'd)
Temperature-Pressure
Relief Valve
_WARNING
At thetimeofmanufacturethiswaterheaterwasprovidedwith
a combinatien temperamre_resseresretief valveearthed by a
nationallyrecognizedtestinglaboratorythatmaintainsperiodic
inspectionof productionof li_.. equipmentor materials,as
meetingthe _luirements for RehefValvesandAutomaticGas
ShutoffDevicesfor Hot Water SupplySystems,andthe latest
editionofANSI 7.21.22and rite coderequirementsof ASME.If
replaced,the valvemustmeet the requirementsof localcedes,
butnot lessthana combinationtemperatureandpressurerelief
valvecertifiedasmeetingthe requirementsfor ReliofValvesand
AutomaticGasShutoff Devicesfor Hot Water SupplySysten_,
ANSI Z21.22by a nationallyrecognizedtestinglaboratorythat
mdnt_ per;oakim4_'t_ of preduct_of,stedequ_=nt
ormaterial_
The valvemustbemarkedwitha maximum setpressurenot
to exceedthe marked hydrostaticworkingpressureof the
water heater (150 IbsJsq.in.) and a dischargecapEt'm/nut
lessthan the water heater inputrate as shownon the model
rating plate.(Electricheaters-watts dividedby 1000x 3415
equalBTU/Hr. rate.)
YourlocaljurirKl_ anthorit_ whilemandatingthe useofa
temperature-pressurerelief valvecomplyingwith ANSI Z21.22
andASME,mayrequirea valvemodeldifferentfromtheonefur-
nishedwiththewaterhe,_er.
Compliancewith suchlocalrequirementsmustbe satisfiedby
theinstalleror enduserof the water heaterwith a locallypre-
scribedtemperature-pressurereliefvalveinstalledin the desig-
natedopeningin the water heaterin placeof the factoryfur-
nishedvalve.
Forsafeoperationof thewater heater,the reliefvalvemustnot
beremovedfromit'sdesignatedopeningorplugged.
The temperature-pressurereliefvalvemustbeinstalleddirectly
intothe fittingofthe water heaterdesignatedfur the reliefvabe.
Positionthevalvedownwardandprovidetubingsothat anydis-
chargewillexit onlywithin 6 inchesabove,or at anydistance
belowthe structuralfloor.Becertainthat no contactismade
withanyliveelectricalpart.The dischargeopeningmustnot be
blockedor reducedin sizeunderany circumstances.Excessive
length,over30 feet,or useofmore than fourelbowscan cause
restrictionand reducethe dischargecapacityofthe valve.
No valveorother obstructionisto be placedbetweenthe relief
valveandthe tank.Do not connecttubingdirectlyto discharge
drainunlessa 6" air gapisprovided.To preventbodilyinjury,
hazardto life,or propertydamage,the relief valvemustbe
allowedto dischargewater in quantitiesshouldcircumstances
demand.If the dischargepipeisnot connectedto a drainor
other suitable means, the water flowmay causeproperty
damage.
The DischargePipe:
• Mustnnt be smallerin sizethanthe outletpipesizeofthe
valve,or haveanyreducingcouplingsor otherrestrictions.
• Mustnot bepluggedor blocked.
• Mustbeofmaterial listedfor hotwater distribution.
• Mustbe installedsoasto allow completedrainageof buth
the temperature-pressurerelief valve,andthe discharge
pipe.
Mustterminate at anadequatedrain.
[_ Mustnot haveanyvalvebetween the reliefvalveandtank.
AWARNING
The temperature-pressure relief valve must be manually
operated at leastonce a year. Caution shouldbetaken to I
ensurethat (I) no one isin from:of or aroundthe outlet
of the temperature-pressure relief valve dischargeline,
md (2) the water manuallydischargedwill not causeany
)odily iniuP/ or property damage becausethe water may
)e extremely hot.
If after manually operating the valve,it failsto completely
reset and continuesto release water, immediately, close
the cold water inlet to the water heater, followthe drain-
ing instructions, and replace the temperature-pressure
reliefvalvewith a new one.
HOT COLD
HOT
.TEMPERATURE-
PRESSURE
RELIEF VALVE
(Do not €_o or plug)
6" AIR GAP
FLOOR DRAIN
T&PRELIEF
INTO TANK
TEMPERATURE-
PRESSURE
RELIEF VALVE
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