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Installation Instructions (cont'd)
Temperature-Pressure Relief Valve
_-- AWARNING
At the time of manufacturethiswater heater wasprovided
with a combinationtemperature-pressuresrelief valvecertified
bya nationallyrecognizedtestinglaboratory that maintains
periodicinspectionofproductionoflistedequi.p,ment or mate-
rials, as meeting the requirements for Rehef Valves and
AutomaticGasShutoffDevicesforHot Water SupplySystems,
andthe latest editionof ANSI Z21.22 and the code require.
ments ofASME. If replaced,the valvemustmeet the require.
ments oflocalcodes,butnot lessthana combinationtempera-
ture and pressure reliefvalvecertifiedasmeetingthe require-
mentsfor ReliefValvesandAutomaticGasShutoffDevicesfor
Hot Water SupplySystems,ANSI Z21.22bya nationally recog-
nized testinglaboratorythat maintains periodicinspectionof
productionoflistedequipmentor materials.
hevalvemust bemarkedwith a maximumset pressurenot
to exceedthe marked hydrostaticworking pressureof the
water heater(150 Ibs./sq.in,)anda dischargecapacitynot less
thanthe water heaterinputrate asshownon themodelrating
plate. (Electric heaters- watts dividedby 1000x 3415 equal
BTU/Hr.rate.) _.
Yourlocaljurisdictionalauthority,whilemandatingthe useofa
temperature-pressurerelief valvecomplyingwithANSI Z21.22
and ASME, may require a valvemodeldifferentfrom the one
furnishedwiththewaterheater.
Compliancewith suchlocalrequirements mustbe satisfiedby
the installeror enduserofthewater heaterwith a locallypre-
scribedtemperature-pressurereliefvalveinstalledinthe desig-
nated openingin the water heaterin placeof the factoryfur-
nishedvalve.
Forsafeoperationofthewaterheater,the reliefvalvemustnot
beremovedfrom it'sdesignatedopeningorplugged,
The temperature-pressurereliefvalvemust beinstalleddirectly
intothefittingofthewaterheaterdesignatedforthereliefvalve.
Positionthevalvedownwardandprovidetubingsothatanydis-
chargewill exit onlywithin6 inchesabove,or at any distance
belowthe structuralfloor.Becertainthat no contactismade
withanyliveelectricalpart.The dischargeopeningmustnot be
blockedor reduced in sizeunderanycircumstances.Excessive
length, over 30 feet,or useof more thanfourelbowscancause
restriction andreducethedischargecapacityofthevalve.
No valveor otherobstructionisto beplacedbetweentherelief
valveandthe tank.Do not connecttubingdirectlyto discharge
drainunlessa6" airgapisprovided.Topreventbodilyinjury,haz-
ardto life,or propertydamage,the relief valvemustbeallowed
to dischargewaterinquantitiesshouldcircumstancesdemand.If
thedischargepipeisnot connectedto a drainor othersuitable
means,thewaterflowmaycausepropertydamage.
The DischargePipe:
Mustnot be smallerin sizethanthe outlet pipesizeofthe
I" valve,or haveanyreducingcouplingsor otherrestrictions.
Mustnot bepluggedor blocked.
Mustbeofmateriallistedforhotwater distribution.
Mustbe installedsoasto allowcompletedrainageof both
the temperature-pressurerelief valve, and the discharge
pipe.
Mustterminateat anadequatedrain.
Mustnothaveanyvalvebetweenthe reliefvalveandtank,
_,WARNING
The temperature.pressure relief valve must be manually
operated at leastonce a year.Caution shouldbe taken to
ensurethat (I) no one isin frontof or aroundthe outlet of
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 manually operatingthe valve,it failsto completely
reset and continuesto releasewater, immediatelyclosethe
coldwater inlet to the water heater, follow the draining
instructions,and replace the temperature-pressure relief
valvewitha newone.
HOT
TEMPERATURE-PRESSURE
RELIEFVALVE
/
• DISCHARGE PIPE
{D_ r_otcap or plus)
PROVIDEA 6" AIR
GAP BETWEEN THE
END OF THE
DISCHARGE PiPE
AND DRAIN
RELIEFVALVEOPENING
At the tir_e of manufacture, this water heater was provided with a combination tem-
perature-pressurerelief valvelistedas complying with the standard for relief valvesand
automatic gas shut-off devicesfor hot water supplysystems, ANSI Z21.22. For safe
operationofthewaterheater,thereliefvalvemustnotberemovedfromitsdesignated
pointof installationor plugged.
Yourlocal jurisdictionalauthority,while mandating the use of a temperature-pressure
relle_valve complyinZ with ANSI 721.22 andASME,may require avalvemodel different
fromtheonefurnishedwiththewaterheater,
Compliancewithsuchlocalrequirementsmustbesatisfiedbytheinstalleror enduser
ofthe water heater with a locallyprescribedtemperature-pressure relief valveinstalled
in the designatedopeningin the water beater
Seemanual headingJ'Temperature-PressureRelief Valves"for installationand mainte-
nance ofrelief valve,dischargeline, andother safetyprecautions.
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