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Installation Instructions (cont'd)
Temperature-Pressure Relief Valve
AWARNING
At the time of manufacture thiswater heater wasprovided
with a combinationtemperature-pressuresrelief valvecerti-
fied bya nationallyrecognized testinglaboratorythat main-
tains periodicinspectionof productionof listedequipment
or materials, as meeting the requirements for ReliefValves
and Automatic Gas ShutoffDevicesfor Hot Water Supply
Systems,andthe current editionof ANSI Z21.22, CSA 4.4
Standardsandthe code requirements of ASME. If replaced,
the valve must meet the requirements of local codes,but
not lessthan a combinationtemperature and pressurerelief
valvecertifiedasmeeting the requirements for ReliefValves
and Automatic Gas ShutoffDevicesfor Hot Water Supply
Systems,ANSI Z21.22 • CSA 4.4 Standardsbya nationally
recognized testing laboratory that maintains periodic
inspectionof productionof listedequipmentor materials.
The valve must be marked with a maximum set pressure
not to exceed the marked hydrostaticworking pressureof
the water heater (150 Ibs./sq.in.) and a dischargecapacity
not lessthan the water heater input rate as shownon the
model rating plate. (Electric heaters- watts dividedby 1000
x 3412equalBTU/Hr. rate.)
Your localjurisdictionalauthority, while mandatingthe use
of a temperature-pressurerelief valvecomplyingwith ANSI
Z21.22 • CSA 4.4 StandardsandASME, may require a valve
model different from the one furnished with the water
heater.
Compliancewith suchlocalrequirements must be satisfied
by the installeror end userof the water heater with a locally
_rescribedtemperature-pressurerelief valveinstalledin the
designatedopeninginthe water heater in placeof the facto-
ry furnishedvalve.
For safeoperationofthe water heater,the relief valvemust
not beremoved from it'sdesignatedopeningor plugged.
The temperature-pressure relief valve must be installed
directly into the fitting of the water heater designatedfor
the relief valve. Positionthe valve downward and provide
tubing so that any dischargewill exit only within 6 inches
above,or at any distancebelowthe structuralfloor. Becer-
tain that no contact is made with any live electrical part.
The dischargeopeningmust not be blockedor reduced in
sizeunderanycircumstances.Excessivelength,over30 feet,
or use of more than four elbowscan causerestriction and
reduce the dischargecapacityofthe valve.
No valve or other obstructionis to be placedbetween the
relief valveand the tank. Do not connecttubing directlyto
dischargedrain unlessa 6" air gap is provided.To prevent
bodily injury,hazard to life, or property damage,the relief
valve must be allowed to discharge water in quantities
shouldcircumstancesdemand. If the dischargepipe is not
connected to a drain or other suitable means, the water
flowmay causeproperty damage.
The DischargePipe:
• Must not besmallerin sizethan the outlet pipesizeofthe
valve,or haveanyreducing couplingsor otherrestrictions.
• Must notbe pluggedor blocked.
• Must be ofmaterial listedfor hot water distribution.
• Must be installedsoasto allowcomplete drainageof both
the temperature-pressurerelief valve, and the discharge
pipe.
• Mustterminate at anadequatedrain.
• Must nothaveanyvalvebetweenthe relief valveandtank.
_'LWARNING
The temperature-pressure relief valve must be manually
operated at least oncea year.Caution shouldbe taken to
ensurethat (I) no one isin front of or aroundthe outlet of
the temperature-pressure relief valve dischargeline, and
(2) the water manuallydischargedwill not causeany bodi-
ly injury or property damage becausethe water may be
extremely hot.
If after manually operating the valve, it failsto completely
reset and continues to release water, immediately close
the cold water inlet to the water heater,follow the drain-
ing instructions, and replace the temperature-prossuro
relief valvewith a new one.
TEMPERATURE-PRESSURE
R_LIEF VALVE
DISCHARGE PIPE
I I_ (Do not cap or
I1\
II \ PROVIDEA6"AIR
I I \ GAP BETWEEN
I I t THE END OF THE
I I • DISCHARGE PIPE
__ AND DRAIN
RELIEFVALVEOPENING
"THISWATERHEATERISAPPROVEDWITHA COMBINATIONTEMPERATURE-
PRESSURERELIEFVALVE. FORSAFEOPERATIONOF THEWATER HEATER,
THE RELIEFVALVE(S) MUST NOT BE REMOVED FROM ITS DESIGNATED
POINTOFINSTALLATIONORPLUGGED."
YOUR LOCALJURISDICTIONALAUTHORITY,WHILE MANDATINGTHE USE
OF A TEMPERATURE-PRESSURERELIEFVALVE COMPLYING WITH ANSI
Z21.22 AND ASME,MAY REQUIREA VALVEMODEL DIFFERENTFROM THE
ONEFURNISHEDWITHTHEWATERHEATER.
COMPLIANCEWITH SUCHLOCALREQUIREMENTSMUSTBE SATISFIEDBY
THE INSTALLEROR END USEROFTHE WATERHEATERWITH A LOCALLY
PRESCRIBEDTEMPERATURE-PRESSURERELIEFVALVEINSTALLEDIN THE
DESIGNATEDOPENINGIN THEWATERHEATER.
SEEMANUAL HEADING- "TEMPERATURE-PRESSURERELIEFVALVES" FOR
INSTALLATIONAND MAINTENANCEOF RELIEFVALVE, DISCHARGELINE
AND OTHERSAFETYPRECAUTIONS.
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