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Installation InstruCtions (cont'd)
Temperature-Pressure Relief Valve
A WARNING
At the time of manufacturethis water heater was provided
with acombinationtemperature-pressuresreliefvalvecertified
by a nationallyrecognizedtestinglaboratorythat maintains
periodic mspec_onof productionof listedequipmentor mate-
rials, as meeting the requirements for Relief Valvesand
AutomaticGasShutoffDevicesfor Hot Water SupplySystems,
and the latesteditionof ANSI Z21.22 andthe coderequire-
meritsof ASME.If replaced,the valvemustmeet the require-
mentsoflocalcodes,but not lessthan a combinationtempera-
ture and pressurereliefvalvecertifiedasmeetingthe require-
ments for ReliefValvesandAutomaticGasShutoffDevicesfor
Hot Water SupplySystems,ANSI Z21.22bya nationallyrecog-
nized testinglaboratorythat maintainsperiodicinspectionof
productionoflistedequipmentor material_
The valvemustbemarkedwit(1a maximumset pressurenot
to exceedthe marked hydrostaticworking pressureofthe
waterheater(150 IbsJsq.in.)and a dischargecapacitynot less
thanthewaterheaterinputrateasshownonthe modelrating
plate.(Electricheaters- watts dividedby 1000x 3415 equal
BTU/Hr.rate.)
Yourlocaljurisdictionalauthority,whilemandatingthe useofa
temperature-pressurerelief valvecomplyingwith ANSIZ21.22
and ASME,mayrequirea valvemodeldifferentfrom theone
furnishedwiththe waterheater.
Compliancewith suchlocalrequirementsmustbesatisfiedby
the installeror enduserofthewater heaterwith a locallypre-
scribedtemperature-pressurereliefvalveinstalledinthedesig-
nated openingin the water heaterin placeof the factoryfur-
nishedvalve.
Forsafeoperationofthe waterheater,the reliefvalvemustnot
beremovedfromit'sdesignatedopeningor plugged.
The temperature-pressurerelief valvemust be installeddirectly
intothefittingofthewaterheaterdesignatedfor thereliefvalve.
Positionthe valvedownwardand providetubingsothatanydis-
chargewillexit onlywithin 6 inchesabove,or at anydistance
belowthe structuralfloor.Becertainthat nocontactismade
withanyliveelectricalpart.The dischargeopeningmustnotbe
blockedor reduced in sizeunderanycircumstances.Excessive
length,over 30feet,or useofmorethan fourelbowscancause
restriction andreducethedischargecapacityofthevalve.
No valveor otherobstructionisto be placedbetweentherelief
valveandthe tank.Do not connecttubingdi_ctly to discharge
drainunlessa 6"airgapisprovided.Topreventbodilyinjury,haz-
ard to life,or propertydamage,the reliefvalvemustbeallowed
todischargewaterinquantitiesshouldcircumstancesdemand.If
the dischargepipeisnot connectedto a drainor othersuitable
means,the waterflowmaycausepropertydamage.
The DischargePipe:
• Mustnot be smallerin sizethan the outlet pipesizeofthe
valve,or haveanyreducingcouplingsorotherrestrlction_
• Mustnot bepluggedorblocked.
Mustbeofmateriallistedfor hotwaterdistribution.
Must be installedsoasto allowcompletedrainageof both
the temperature-pressurerelief valve, and the discharge
pipe.
Mustterminateat anadequatedrain.
Mustnot haveanyvalvebetweenthe reliefvalvaandtank.
&WARNING
The temperature-pressure relief valve must be manually
operated at leastonce a year.Cautionshouldbe taken to
ensurethat (I) no one isin front ofor aroundthe outlet of
the temperature-pressure reliefvalvedischargeline,and (2)
the water manually dischargedwill not causeany bodily
injury or property damage because the water may be
extremelyhot.
ff after manuallyoperatingthe valve, it fails.to completely
resetand continuesto releasewatar, immedmatelyclosethe
cold water inlet to the water heater, follow the draining
instructions,and replace the temperature-pressurerelief
valvewith anewone.
HOT
SHUT OFF
VALVE
COLD
)_ PRESSURE
RELIEF VALVE
PIPE (Do not cap
or plug)
FLOOR DRAIN
RELIEFVALVEOPENING
At thetimeofmanufacture,thiswaterheaterwasprovidedwithacombinationtem-
perature-pressurereliefvalvelistedascomplyingwith thestandardfor reliefvalves
andautomaticgasshut-offdevicesfor hotwatersupplysystems,ANSIZ2}.22.For
safeoperation ofthe water heater,the relief valvemust not be removed from itsdes-
Fgnatedpointofinstallationorplugged.
Your localiurisdictional authority,while mandating the useofa temperature-pressure
relief valvecomplyingwith ANSI Z21.22 andASME, mayrequirea valvemodel differ-
entfrom the one furnished with the water heater
Compliancewith suchlocalrequirementsmust be satisfiedby the instalieror enduser
of the water heater with a locally prescribed temperature-pressure relief valve
instaJledinthe designatedopeninginthe water heater
Seemanual heading-"Temperature-Pressure ReliefValves"for installationandmainte-
nance of relief valve, dischargeline,and other safetyprecautions.
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