blockthedischargeopeningorhinderaccesstothemanual
relieflever(Figure9). Ensureadischargepipeisinstalled
intotheT&Pvalvedischargeopeningpertheinstructionsin
thismanual.
4.Locatethehotwater(outlet)&coldwater(inlet)pipestothe
waterheater.
5.Locatetheslitrunningthelengthof a sectionofpipe
insulation.
6.Spreadtheslitopenandsliptheinsulationoverthecold
water(inlet)pipe.Applygentlepressurealongthelengthof
theinsulationtoensurethatit isfullyseatedaroundthepipe.
Also,ensurethatthebaseof theinsulationisflushwiththe
waterheater.Onceseated,securetheinsulationwithduct
tape,electricaltape,orequivalent.
7.Repeatsteps5and6forthehotwater(outlet)pipe.
8.Addadditionalsectionsofpipeinsulationasneeded.
Thevalvemustbemarkedwithamaximumsetpressurenotto
exceedthemarkedhydrostaticworkingpressureof thewater
heater(150psi=1,035kPa)andadischargecapacitynottess
thanthewaterheaterinputrateasshownonthemodelrating
plate.(Forelectricheaters,wattsx 3.412equalsBtu/hrinput
rate)
Forsafeoperationofthewaterheater,thereliefvalvemustnot
beremovedfromitsdesignatedopeningnorplugged.
Thetemperature-pressurereliefvalvemustbeinstalleddirectly
intothefittingofthewaterheaterdesignedforthereliefvalve.
Positionthevalvedownwardandprovidetubingsothatany
dischargewillexitonlywithin6inches(153mm)above,oratany
distancebelowthestructuralfloor.Becertainthatnocontactis
madewithanyliveelectricalpart.Thedischargeopeningmust
notbeblockedor reducedinsizeunderanycircumstances.
Excessivelength,over30feet(9.14m),or useofmorethan
fourelbowscancauserestrictionandreducethedischarge
capacityofthevalve.
T&PReliefValveInsulation
efLever
Relief Valve
Drain Line
FIGURE 9.
Temperature-Pressure Relief Valve
Explosion Hazard
Temperature-pressure relief valve
must comply with ANSI Z21.22
CSA 4.4 andASME code.
•Properly sized temperature-relief
valve must beinstalled inopening
provided.
• Can result in overheating and
excessive tank pressure.
• Can cause serious injury or death.
This heater is provided with aproperly certified combination
temperature -pressure relief valve by the manufacturer.
The valve is certified bya nationally recognized testing laboratory
that maintains periodic inspection of production of listed
equipment of materials as meeting therequirements for Relief
Valves for Hot Water Supply Systems, ANSI Z21.22 •CSA 4.4,
and the code requirements of ASME.
If replaced, the valve mustmeet therequirements of local codes,
but not less than acombination temperature and pressure relief
valve certified as indicated inthe above paragraph.
Water Damage Hazard
• Temperature-pressure relief valve discharge
pipe must terminate at adequate drain.
No valve or other obstruction is to be placed between the relief
valve and the tank. Do not connect tubing directly to discharge
drain unless a 6 inch air gap is provided. To prevent bodily
injury, hazard to life, or property damage, the relief valve must
beallowed todischarge water in quantities should circumstances
demand. Ifthe discharge pipe isnot connected to adrain or other
suitable means, the water flow may cause property damage.
The Discharge Pipe:
• Shall not be smaller insize than the outlet pipe size of the
valve, orhave any reducing couplings or other restrictions.
• Shall not be plugged or blocked.
• Shall be of material listed for hot water distribution.
• Shall be installed soas to allow complete drainage ofboth the
temperature-pressure relief valve, and the discharge pipe.
• Shall terminate amaximum ofsix inches above afloor drain or
external tothe building. Incold climates, it is recommended
that the discharge pipe be terminated at an adequate drain
inside the building.
Shall not have any valve between the relief valve and tank.
ITs5D7.,1[€]:l Water temperature over 125°F(52°C) can cause severe burns
instantly resulting in severe injury
or death.
Children, the elderly, and the
physically or mentally disabled
are at highest riskfor scald injury.
Feel water before bathing or
showering.
Temperature limiting valves are
available.
Read instruction manual for safe
temperature setting.
11