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Installation Instructions (cont'd)
Temperature-Pressure Relief Valve
AWARNING
At the time of manufacturethis water heater wasprovided
with a combinationtemperature-pressuresreliefvalvecerti-
fied bya nationallyrecognizedtestinglaboratory teat main-
tainsp.eriodlcinspectionofproductionoflistedequipmentor
matemls, asmeetingthe requirements for ReliefValvesand
Automatic Gas Shutoff Devices for Hot Water Supply
Systems,and the latesteditionofANSI Z21.22 andthe cede
requirements ofASME. If replaced, the valve mustmeet the
requirements oflocalcedes,but not lessthan a combination
temperature and pressurerelief valvecertified as meeting i
the requirements for Relief Valves and Automatic Gas
ShutoffDevicesfor Hot Water SupplySystems,ANSI Z21.22
bya nationallyrecognized testinglaboratorythat maintains
periodic inspection of production of listed equipment or
materials.
The valvemustbe markedwith a maximum set pressurenot
to exceedthe marked hydrostaticworking pressureof the
water heater (150 Ibs.lsq.in.) and a dischargecapacitynot
lessthan the water heater inputrate asshownonthe model
rating plate. (Electric heaters- watts dividedby 1000x 3415
equalBTU/Hr. rate.)
Yourlocaljurisdictionalauthority,whilemandatingtheuseof
a temperature-pressure relief valve€omplyin.gwith ANSI
Z21.22 and ASME, may require a valvemodeld_fferentfrom
the onefurnishedwith thewater heater.
Compliancewith suchlocalrequirements must be satisfied
bythe installeror enduserofthe water heaterwith a locally
prescribedtemperature-pressurerelief valveinstalledin the
designatedopeninginthe water heaterm placeofthe facto.
ry furnishedvalve.
Forsafeoperationofthe water heater,the relief valvemust
not beremoved from it'sdesignatedopeningor plugged.
The temperature.pressure relief valve must be installed
directlyintothe fittingofthewater heaterdesignatedfor the
relief valve.Position the valve downwardand providetubing
sothat anydischargewill exit onlywithin6 inchesabove,or
at anydistancebelowthe structural floor.Becertainthat no
contactis made with any live electricalpart. The discharge
openingmustnot be blockedor reduced in size under any
circumstances.Excessivelength, over 30feet, or useofmore
thah four elbowscan causerestriction and reduce the dis-
chargecapacityofthevalve.
No valveor other obstructionisto be placedbetweenthe
relief valveand the tank. Do not connecttubingdirectlyto
dischargedrain unlessa 6" air gap isprovided.To prevent
bodilyinjury, hazardto life, or property damage,the relief
valvemustbeallowedto dischargewater inquantitiesshould
circumstancesdemand.If the dischargepipeisnot connect-
ed to a drain or other suitablemeans,the water flow may
Icausepropertydamage.
The DischargePipe:
Mustnot besmallerin sizethan the outlet pipesizeofthe
valve,or haveanyreducing couplingsor other restrictions.
Mustnot bepluggedor blocked.
Mustbe ofmateriallistedfor hot waterdistribution.
Must beinstalledsoasto allowcompletedrainageofboth
the temperature-pressurerelief valve, and the discharge
pipe.
Mustterminate at anadequatedrain.
Mustnot haveanyvalvebetweentherelief valveand tank.
AWARNING
The tomperature-pressure relief valve must be manually
Ioperated at leastonce a ye_ Caution shouldbe taken to
ensureth_ (I) no one _sin fventofer _md the outlet of
the temperature-pressurereliefvalvedischargeline,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
SHUTOFF
VALVE
COLD
I
HOT COLD
I
PRESSURE
RELIEF VALVE
[]
-DISCHARGE PIPE
(Do not cap or plug)
6" AIR GAP
FLOOR DRAIN
RELIEFVALVEOPENING
At thetimeofm_acture, thiswaterheaterwasprovidedvi_ha com_maUontem-
perature-pressurereliefvalvelistedascomplyingwiththestandardfor reliefvalvesand
automaticgasshut-offdevicesfor hotwatersupplysystems,ANSIZ21.22.For safe
op_ationofthewaterheater,the_i_ valvemustnotberemove_|tomi_ designate_
pointof installationor plngged.
Yourlocaljurisdictionalauthori_,,whilemandatingtheuseof a[emperature-pressure
reL_ valvecor_yi% _i_ ANSiZ2t.7.2andAS_E,r_ayr_ire avalvemodeldifferer_
froththeonefurnishedwichthe waterheater.
Compliancewithsuchlocalrequirementsmustbesatisfiedbythe installerorenduser
of thewa_erheaterw_ aIoc_gyprescribedtempera_re-pressu_ere_f wive ins_alfed
inthedesignatedopeninginthewaterheate_
Seemanualheading."Temperature#ressureReliefValves"forinstallationandmainte-
12
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