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Installation Instructions (cont'd)
Temperature-Pressure
Relief Valve
• ,WARNING
At the time ofmanufacture thiswater heater wasprovided
with a combinationtemperature-pressuresrelief valvecer-
tified by a nationally recognized testing laboratory that
maintainsperiodicinspectionof productionof listedequip-
ment or materials, asmeeting the requirements for Relief
Valvesand Automatic Gas ShutoffDevicesfor Hot Water
SupplySystems,and the latestedition of ANSI Z21.22 and
the code requirements of ASME. If replaced, the valve
must meet the requirements of local codes,but not less
than a combination temperature and pressurerelief valve
certified as meeting the requirements for ReliefValvesand
Automatic Gas Shutoff Devices for Hot Water Supply
Systems,ANSI Z21.22 by a nationally recognizedtesting
laboratorythat maintainsperiodicinspectionofproduction
of listedequipmentor materials.
The valve must be marked with a maximum set pressure
not to exceedthe marked hydrostaticworking pressureof
the water heater (I 50 Ibs./sq.in.) and a dischargecapacity
not lessthan the water heater input rate as shownon the
model rating plate. (Electric heaters, watts divided by
1000x 3415 equalBTU/Hr. rate.)
Yourlocaljurisdictionalauthority,while mandatingthe use
of a temperature-pressure relief valve complying with
ANSI Z21.22 and ASME, may require a valvemodel differ-
ent from the one furnishedwith the water heater.
Compliancewith suchlocalrequirements mustbe satisfied
by the installer or end user of the water heater with a
locally prescribed temperature-pressure relief valve
installedin the designatedopeningin the water heater in
)laceofthe factory furnishedvalve.
For safe operation of the water heater, the relief valve
must not be removed from it's designated opening or
plugged.
The temperature-pressure relief valve must be installed
directly into the fitting of the water heater designatedfor
the relief valve. Positionthe valvedownward and provide
tubing so that any dischargewill exit onlywithin 6 inches
above,or at anydistancebelowthe structuralfloor.Be car-
tain that no contact ismade with any live electrical part.
The dischargeopeningmust not be blockedor reduced in
size under any circumstances.Excessivelength, over 30
feet, or useof more than four elbowscancauserestriction
andreduce the dischargecapacityofthe valve.
No valveor other obstructionisto be placedbetween the
relief valveand the tank. Do not connecttubingdirectly to
dischargedrain unlessa 6" air gap is provided.To prevent
bodilyinjury,hazard to life, or property damage,the relief
valve must be allowed to discharge water in quantities
shouldcircumstancesdemand. If the dischargepipe isnot
connected to a drain or other suitable means, the water
flowmay causeproperty damage.
The DischargePipe:
Must not be smaller in size than the outlet pipesize of
the valve, or have any reducing couplings or other
restriction.
Must not bepluggedor blocked.
Must beof material listedfor hot water distribution.
Must be installed so as to allow complete drainage of
both the temperature-pressurerelief valve, and the dis-
chargepipe.
Must terminate at anadequatedrain.
Mustnot havean),valvebetweenthe relief valveand tank.
_,WARNING
The temperature-pressure relief valve must be manually
operated at leastonce a year. Caution shouldbe taken to
ensure that (I) no one is in front of or aroundthe outlet
of the temperature-pressure relief valve discharge line,
and (2) the water manually dischargedwill not causeany
bodilyinlury or property damage becausethe water may
beextremely hot.
If after manuallyoperating the valve, it fallsto completely
reset and continuesto release water, immediately, close
the coldwater inlet to the water heater,follow the drain-
ing instructions, and replace the temperature-pressure
relief valvewith a newone.
TEMPERATURE-PRESSURE
RELIEF VALVE
(Do not cap or
plug, Provide = 6"
air gap between
SHUT-OFF
VALVE
T&P RELIEF
VALVE PROBE
MUST EXTEND
INTO TANK
'TEMPERATURE-
PRESSURE
RELIEF VALVE
T&P
SHANK
NIPPLE 'LENGTH
• Ifa short _ank (lessthan 2") terngeralure-pcessure reflefvaNe isto be installed
(as shown),a nipple and coupling mustbe used.
• If a long shank(2" orlonger)isIo be installed,dono_use the nlptdeand coupling.
"InstalTemperature-Pressureprotec_dveegeiprnentrequiredby lecaJcodes,butnot_ than a combipa.
t,rOnTembelatu(e.PressuleRelief Valve ce_fied as meeffog_therequ_remenlsfol Relief valve_=J',d
AutomaticGas ShutoffDev_esforHot-Wa_ S_pohJSy_Perns,ANS Z21,22bya ea_neJly,ecognbedtesl.
_g leboratc_Jthai mar,tairmpedodicinsgec_onef prod_c0onef Ileledequipmentor matene_sT_e "ndve
rnustbe oriented,p_ovleedw_;htu_ing,orefher,_se installedso_at _sch_ge can exit_ _n 6 _s
shovelor atan_dist_ce befowthese_'turalticor_a_ cannotcoraac_any_veele_rlelepat •
Fc_safe ogera_onof_le weferheater,the ReliefVaJvernestnc_be _ orpl_gge(L.
See manualheading• *Tomgerefure.Pressu,eReliefVaNe" for instalton Pl_ntenance ot Relief
VaJve,dischargep_peandother safetyixecaut_cns
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