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Installation Instructions (cont'd)
Temperature-Pressure Relief Valve
_,WARNING
At the time of manufacture thiswater heater was provided
with acombinationtemperature-presseresrelief valvecertified
by a nationally recognized testinglaboratory that maintains
_eriodicinspectionofproductionof listedequipmentor mate-
rials, as meeting the requirements for Relief Valvesand
AutomaticGasShutoffDevicesfor MotWater SupplySystems,
and the latest editionofANSI Z21.22 andthe code require-
ments of ASME.If replaced, thevalvemustmeet the require-
ments oflocalcodes,but notlessthana combinationtempera-
tore and pressurerelief valvecertifiedasmeetingtherequire-
mentsfor ReliefValvesandAutomaticGasShutoffDevicesfor
Hot Water SupplySystems,ANSI Z21.22bya nationallyrecog-
nized testinglaboratorythat maintainsperiodicinspectionof
productionoflistedequipmentor materials.
The valvemustbe markedwith a maximumset pressurenot
to exceedthe marked hydrostaticworking pressureof the
waterheater (150Ibsdsq.in.)anda dischargecapacitynot less
thanthewaterheaterinputrate asshownonthe modelrating
plate.(Electricheaters- watts dividedby 1000x 3415 equal:
BTU/Hr.rate.)
Yourlocaljurisdictionalauthority,whilemandatingtheuseofa
temperature-pressurereliefvalvecomplyingwith ANSI Z21.22
and ASME,mayrequire a valvemodeldifferentfrom the one
furnishedwiththewaterheater.
Compliancewith suchlocalrequirements mustbe satisfiedby
the installeror enduserofthe waterheaterwith a locallypre-
scribedtemperature-pressurerelief valveinstalledin thedesig-
nated openingin the water heaterin placeofthe factoryfur-
nishedvalve.
Forsafeoperationofthewaterheater,therelief valvemustnot
be removedfromit'sdesignatedopeningor plugged.
The temperature-pressurereliefvalvemust beinstalleddirectly
intothefittingofthewaterheaterdesignatedforthereliefvalve.
Positionthe valvedownwardandprovidetubingsothat anydis-
chargewillexit onlywithin 6 inchesabove,or at anydistance
below thestructuralfloor.Be certainthat no contactismade
withanyliveelectricalpart.Thedischargeopeningmust notbe
Mockedor reducedin sizeunder anycircumstances.Excessive
length,over30 feet,or useofmorethan fourelbowscancause
restriction andreducethedischargecapacityofthe valve.
No valveor otherobstructionistobe placedbetweentherelief
valveandthe tank. Do not connecttubingdirectlyto discharge
drainunlessa6"air gapisprovided.Topreventbodilyiniury,haz-
ardto life,or propertydamage,the reliefvalvemustbeallowed
todischargewaterinquantitiesshouldcircumstancesdemand.If
the dischargepipeisnot connectedto a drainor othersuitable
means,thewaterflowmaycausepropertydamage.
The DischargePipe:
Mustnot be smallerin sizethan the outlet pipe sizeof the
valve,or haveanyreducingcouplingsor otherrestrictions.
Mustnot bepluggedor blocked.
Mustbe ofmateriallistedforhotwaterdistribution.
• Must beinstalledsoasto allowcompletedrainageof both
the temperature-pressurerelief valve, and the discharge
pipe.
• Mustterminateat anadequatedrain.
• Mustnothaveanyvalvebetweentherelief valveandtank.
AWARNING
The temperature-pressure relief valve must be manually
operated at leastonce a year.Caution shouldbe taken to
ensurethat (I) no one isin front of 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
cold water inlet to the water heater, follow the draining
instructions,and replace the temperature-pressure relief
valvewith anew one.
HOT
TEMPERATURE-PRESSURE
RELIEEVALVE
/
DISCHARGE PIPE
(Do not cap or plug)
PROVIDE A 6" AIR
GAP BETWEEN THE
END OF THE
DISCHARGE PIPE
AND D_IN
RELIEFVALVEOPENING
A[ the time of manufacture, this water heater was provided with a combination tem-
perature-pressure rebel valvelisted as complying with the standard for relief valvesand
automatic gas shut-off devices for hot water supply systems, ANSI Z21.22. For safe
opera(ion of the water heater, the relief vatve must notbe removedfrom i_ 6es_natec_
point of installation or plugged.
Your local jurisdictional authority, while mandating the use of a temperature-pressure
relief valvecomplying with ANSI Z21.22 and ASME, may require a valve model different
from the one furnished with the water heater
Compliancewith such local requirements must be satisfied by the installer or end user
of the water heater with a locally prescribedtemperature-pressure relief valve installed
in the designated opening inthe water heater
See manual heading -"Temperature-Pressure Relief Valves"for inscagation and mainte-
nance of relief valve,discharge line,andother safetyprecautions.
13
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