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Installation Instructions (cont'd)
Temperature-Pressure Relief Valve
_WARNING
At the time of manufacturethis water heaterwas provided
witha combinationtemperature.pressuresraliofvalvecertified
by a nationallyrecognizedtestinglaboratorythat maintains
.p_'odic inspectionofproductionoflistedequipmentormete-
rmals,as meeting the requirements for ReliefValves and
AutomaticGasShutoffDevicesforHot Water SupplySystems,
andthe latestedition ofANSI Z21.22 and the coderequire-
!mentsof ASME.If replaced,the valvemustmeetthe require-
menu ofIoealcodes,but notlessthana combinationtempera-
ture and pressurerelief valvecertifiedasmeetingthe require-
mentsfor ReliefValvesandAutomaticGasShutoffDevicesfor
Hot Water SupplySystems,ANSIZ21.22bya nationallyrecog-
nizadtesting laboratorythat mmntainsperiodicinspectionof
productionoflistedequipment ormaterials.
The valvemust he markedwith a maximumsat pressureloot
to exceedthe marked hydrostaticworkingpressureof the
waterheater(IS0 II_J_, in.)anda dischargecapacitynot less
thanthe waterheaterinputrate asshownonthemodelrating
plate.(Electricheaters• watts dividedby 1000x 3415 equal
BTU/Hr.rate.)
Yourlocaljurisdictionalanthori_, whilemandatingthe useofa
temperature-pressurereliefvalvecomplyingwithANSI Z21.22
andASME,mayrequire a valvemodeldifferentfrom the one
fomishedwiththewakerheater.
Compliancewithsuchlocalrequirementsmustbesatisfiedby
the installeror enduserofthe water heaterwith a locallypre-
scribedtemperature-pressurereliefvalveinstalledinthe desig.
natedopeningin thewater heaterin placeofthefactoryfur-
nisbedvalve,
Forsafeoperationofthewater heater,the reliefvalvemustnot
beremovedfromit_ designatedopeningorplugged,
IThetemperature-pressurereliefvalvemustbe installeddirectly
intothefittingofthewaterheaterdesignatedfor thereliefvalve.
Positiontilevalvedownwardend providetubingsothatanydis-
chargewill exitonlywithin6 inchesabove,or at anydistance
belowthe structuralfloor.Be certainthat no contact ismade
withanyliveelectricalpart.Thedischargeopeningmustnot be
blockedor reducedinsize underanycircumstances.Excessive
length,over30 feet,or useofmorethan fourelbowscancause
restflcdonandreducethedischargecapacityofthevalve.
No valveorotherobstructionisto he placedbetweenthe relief
valveandthetank.Do not connecttubingdirectlyto discharge
drainunlessa6" airgapisprovided.Topreventbodilyinjury,hez.
ardto life,or propertydamagethe reliefvalvemustbe allowed
to dischargewater inquantitiesshouldc_rcumstancesdemand.If I
the dischargepipeisnotconnectedto a drainor othersuitable
means,thewaterRowmaycausepropertydamage,
TheDischargePipe:
• Mustnot be smallerin sizethanthe outletpipesizeofthe
valve,orhaveanyreducingcouplingsor otherrestrictions.
• Mustnetbepluggedorblocked.
• Mustbe ofmateriallistedfor hotwater distribution.
I. Mustbe installedsoasto allowcompletedrainageofboth
the temperature.pressurerelief valve,and the discharge
pipe.
• Mustterminateat anadequatedrain.
• Mustnothaveanyvalvebetweenthe reliefvalveandtank.
AWARNING
The temperature-pressure relief valvemust be manually
operatedat leastoncea yea_ Cautionshouldbe takento
ensurethat (I) no one isinfrontof or aroundthe outletof
the temperature-pressurerelief valvedischargeline,and (2)
the water manually dischargedwill not causeany bodily
injury or property damage because the water may be
extremelyhot.
If after manuallyoperatingthe valve,it failsto completely
resetand continuesto releasewater,immediatelydosethe
coldwater inlet to the water heater, follow the draining
instructions,and replace the temperature-pressurerelief
valvewith a newone.
HOT
[]
SHUTOFF COLD
VALVE
"EHPERATURE-
PRESSURE
RELIEF VALVE
(Do not cap or plus)
6" AIR GAP
RELIEFVALVEOPENING
At the time of _ocu_, thiswater heaterwas providedwith a combinationtem-
perature-pressurerelief valvelistedascomNyfeg with the standa_lfor rdiet" valvesand
automatic gasshut-offdevices for hot war_r supplysystems,ANSi Z21.22. For safe
operationof the water heater,the _lef valvemust notbe removed from itsdesignated
ypOouintofinstaibtioncr plugged.
r load urisdictiona{authori_, while mandatingthe use of a tem_rature-pre_sure
re{iefvalvecomplyingwithANSI 7-.21,22andASPIE,mayrequire a _alvemodeldfferent
fromthe onefurnishedwith the water heater
Compliancewith suchlocal requirements must be satisfied bythe ins_ler or end user
ofthe water heaterwith a locallyprescril_ temperature-pressure relief valveinstalled
in the designatedopeninginthe water heater
Seemanual heading-'q'ernperature-FYessureReliefValves"for instalbtion and mainte-
nance ofrelief valve,dischargeline,and other safer7 precautions.
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