Temperature-Pressure Relief Valve

Installation Instructions (cont'd)

_--AWARNING

At the time of manufacturethis water heater was provided

with a combinationtemperature-pressuresreliefvalvecertified by a nationally recognizedtesting laboratory that maintains

periodicinspectionofproductionof listedequi.mentp, or mate- rials, as meeting the requirements for Rehef Valves and

Automatic GasShutoffDevicesfor Hot Water SupplySystems, and the latest edition of ANSI Z21.22 and the code require.

ments of ASME. If replaced, the valvemust meet the require. ments of local codes,but not lessthan a combinationtempera-

ture and pressure reliefvalvecertified as meetingthe require- mentsfor ReliefValvesand Automatic GasShutoffDevicesfor

Hot Water SupplySystems,ANSI Z21.22 bya nationally recog- nized testinglaboratory that maintains periodicinspectionof productionof listedequipmentor materials.

he valve must be marked with a maximum set pressurenot to exceed the marked hydrostaticworking pressure of the water heater (150 Ibs./sq.in,) and a dischargecapacitynot less than the water heater input rate asshownon the modelrating plate. (Electric heaters- watts dividedby 1000 x 3415 equal

BTU/Hr. rate.)_.

Yourlocaljurisdictionalauthority,whilemandatingthe useof a temperature-pressurereliefvalvecomplyingwith ANSI Z21.22 and ASME, may require a valvemodeldifferentfrom the one furnishedwith the water heater.

Compliancewith suchlocalrequirements mustbe satisfiedby the installeror end userof the water heater with a locallypre- scribedtemperature-pressurereliefvalveinstalledin the desig- nated openingin the water heater in placeof the factoryfur- nishedvalve.

Forsafeoperationofthe water heater,the relief valvemustnot be removed from it'sdesignatedopeningor plugged,

The temperature-pressurereliefvalvemust be installeddirectly intothe fittingofthe water heaterdesignatedfor the relief valve. Position the valvedownwardand providetubingsothat any dis-

chargewill exit only within 6 inchesabove,or at any distance belowthe structuralfloor. Be certainthat no contactis made

with any liveelectricalpart.The dischargeopeningmustnot be blockedor reduced in size underany circumstances.Excessive

length, over 30 feet,or useof more than four elbowscancause restriction andreducethe dischargecapacityofthe valve.

No valveor other obstructionisto beplacedbetweenthe relief valveand the tank. Do not connecttubingdirectlyto discharge drain unlessa 6" air gapisprovidedTopreventbodilyinjury,haz.- ard to life,or propertydamage,the relief valvemustbeallowed to dischargewater in quantitiesshouldcircumstancesdemand.If the dischargepipe isnot connectedto a drain or other suitable means,the waterflowmay causepropertydamage.

The DischargePipe:

Must not be smallerin size than the outlet pipe size of the I " valve,or haveany reducingcouplingsor other restrictions.

Must not be pluggedor blocked.

Must beof materiallistedfor hot water distribution.

Must be installedso as to allowcomplete drainageof both the temperature-pressure relief valve, and the discharge pipe.

Mustterminateat anadequatedrain.

Must not haveanyvalvebetweenthe relief valveand tank,

_,WARNING

The temperature.pressure relief valve must be manually operated at least once a year. Caution should be taken to ensurethat (I) no one is in front of or aroundthe outlet of the temperature-pressurereliefvalvedischargeline, and (2) the water manually dischargedwill not cause any bodily injury or property damage because the water may be extremelyhot.

If after manually operating the valve, it fails to completely reset and continuesto releasewater, immediately closethe

cold water inlet to the water heater, follow the draining instructions,and replace the temperature-pressure relief valvewith a newone.

	TEMPERATURE-PRESSURE
HOT	/	RELIEFVALVE

• DISCHARGE PIPE {D_ r_ot cap or plus)

PROVIDE A 6" AIR

GAP BETWEEN THE

END OF THE

DISCHARGE PiPE

AND DRAIN

RELIEFVALVE OPENING

At the tir_e of manufacture, this water heater was provided with a combination tem-

perature-pressure relief valve listedas complying with the standard for relief valvesand automatic gas shut-offdevices for hot water supply systems, ANSI Z21.22. For safe

operationofthe waterheater,the relief valvemustnot be removedfromitsdesignated

point of installationor plugged.

Your local jurisdictional authority, while mandating the use of a temperature-pressurerelle_valve complyinZ with ANSI 721.22 and ASME, may require a valve model different

from the onefurnishedwiththe waterheater,

Compliancewithsuchlocalrequirementsmustbe satisfiedbythe installeror enduser

of the water heater with a locallyprescribedtemperature-pressure relief valveinstalled in the designatedopening in the water beater

See manual headingJ'Temperature-PressureReliefValves" for installationand mainte- nance of relief valve,dischargeline, and other safety precautions.