Operating instructions

Instructions for Installation (cont'd)
Temperature-Pressure Relief Valve
_WARNING _,WARNING I
At thetimeof manufacturethiswater heaterwas provid- The temperature-pressurerelief valve mustbe manu-
edwith a combinationtemperature-pressuresreliefvalve ally operated at leastoncea year,Cautionshouldbe
certifiedbyanationallyrecoclnizedtestinglaboratorythat taken to ensure that (1) no one is in front of or
maintainsperiodicinspectionof productionof listed around the outlet of the temperature-pressurerelief
equipmentor materials,as meetingthe requirementsfor valve dischargeline, and (2) the water manually dis- I
ReliefValvesandAutomaticGasShutoff Devicesfor Hot
chargedwill not causeany bodily injury or property
Water SupplySystems,andthe currenteditionof ANSI damagebecausethe water may beextremely hot.
Z21.22andthe coderequirementsof ASME.If replaced, If after manuallyoperatingthe valve, it fails to corn-
the valvemustmeetthe requirementsof localcodes,but pletely reset and continuesto releasewater, immedi-
not lessthan a combinationtemperatureand pressure ately closethe cold water inlet to the water heater,
relief valve certified as meetingthe requirementsfor follow the draining instructions, and replace the
ReliefValvesandAutomaticGasShutoffDevicesfor Hot temperature-pressurereliefvalve with a new one.
WaterSupplySystems,ANSIZ21.22byanationallyrecog-
nizedtestinglaboratorythatmaintainsperiodicinspection
ofproductionoflistedequipmentormaterials.
Thevalvemustbe markedwith a maximumsetpressure SHUTOFF
notto exceedthe markedhydrostaticworkingpressureof VALVE
thewater heater(150Ibs./sq.in.)anda dischargecapacity _-'_'_ _l-_
notlessthanthewater heaterinputrateasshownon the
modelratingplate. (Electricheaters- watts dividedby _ F-_]11_ _C:_
1000x3415equalBTU/Hr.rate.) HOT COLD
Your local jurisdictional authority, while mandating the
use of a temperature-pressure relief valve complying with
ANSIZ21.22andASME,mayrequirea valvemodeldiffer- ,f ,"x
ent fromtheonefurnishedwith thewaterheater. [ ,
Compliancewith suchlocalrequirementsmustbesatisfied
bythe installeror end userof the water heaterwith a _
locally prescribedtemperature-pressurerelief valve |
installedin thedesignatedopeninginthewater heaterin
placeofthefactoryfurnishedva{ve.
Forsafeoperationof the water heater,the relief valve _ TEMPERATURE-
I rl\ PRESSURE
plugged.mustn°tberem°vedfrom it's designatedopeningor II1"_ RELIEFVALVE
The temperature-pressure relief valve must be installed
directly into the fitting of the water heater designated for DISCHARGEPIPE
cap
the reliefvalve.Positionthevalvedownwardandprovide ,orplug)
tubingsothatanydischargewill exitonlywithin6 inches r_l
above,or at any distancebelowthe structuralfloor.Be
certainthat no contactis madewith any live electrical
part. The dischargeopening must not be blockedor
reducedinsizeunderanycircumstances.Excessivelength,
over30 feet, or useof morethan fourelbowscancause
restrictionandreducethedischargecapacityof thevalve.
No valveorotherobstructionisto be placedbetweenthe
reliefvalveandthetank. Donotconnecttubingdirectlyto
dischargedrainunlessa 6" air gapisprovided.Toprevent
bodilyinjury,hazardto life,or propertydamage,the relief
valve mustbe allowedto dischargewater in quantities
shouldcircumstancesdemand.If the dischargepipeisnot FLOORDRAIN
connectedto a drainor othersuitablemeans,the water
Y_
flow maycausepropertydamage.
TheDischargePipe: RELIEF VALVE OPENING
• Mustnotbe smallerin sizethanthe outletpipesizeof
the valve, or have any reducing couplings or other Atthetimeof manufacture,thiswaterheaterwasprovidedwitha combination
temperature-pressurereliefvalvelistedascomplyingwiththestandardforrelief
restrictions, valves and automatic gas shut-off devices for hot water supply systems, ANSI
Must not be plugged or blocked. Z21.22. For safe operation of the water heater, the relief valve must not be
: Mustbeof materiallistedfor hotwaterdistribution.
removed from itsdesignated point of installation or plugged,
• Must be installedsoasto allow completedrainageof Yourlocalurisdictionalauthority,whilemandatingtheuseofatemperature-
pressurereliefvalvecomplyingwithANSIZ21.22andASME,mayrequireavalve
both the temperature-pressure relief valve, and the dis- model different from the one furnished with the water heate_
charge pipe. Compliance with such 10cal requirements must be satisfied by the installer or
• Must terminate at an adequate drain, end user of the water heater with a locally prescribed temperature-pressure
• Must not have any valve between the relief valve and reliefvalveinstalledinthedesignatedopeninginthewaterheater.
See manual heading J'Temperature-Pressure Relief Valves" for installation and
tank. maintenance of relief valve, discharge line, and other safety precautions.
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