Instructions for Installation (cont'd)
Temperature-Pressure Relief Valve
&WARNING J AWARNING
At the time of manufacturethis water heater was provid-7he temperature-pressure relief valve must bemanu-
eclwith a combination temperature-pressuresrelief va ve ally operated at least once a year. Caution should be
taken to ensure that (1) noone is in front of orcertified bya nationally recognizedtesting laboratory that
maintains periodic inspection of production of listed I around the outlet of the temperature-pressure relief
equipment or materials, as meeting the requirementsfor valve discharge line, and (2) the water manually dis-
ReliefValvesand Automatic GasShutoff Devicesfor Hot !charged will not cause any bodily injury or property
Water Supply Systems, and the latest edition of ANSI damage because the water may be extremely hot.
ZZ1.22 and the code requirements of ASME. If replaced, IIf after manually operating the valve,it fails to corn-
the valve mustmeet the requirementsof localcodes,but pletely reset and continues to release water, immedi-
not lessthan a combination temperature and pressure ately close the cold water inlet to the water heater,
relief valvecertified as meeting therequirements for follow the draining instructions, and replace the
Relief Valvesand Automatic Gas Shutoff Devicesfor Hot ,temperature-pressure relief valve with a new one.
Water SupplySystems,ANSI Z21.22 by a nationally recog-
nized testing laboratorythat maintainsperiodicinspection_
of productionof listedequipmentor materials. H_OT CO<_LD
The valvemust be marked with a maximum set pressure _-- _ _
not to exceedthemarked hydrostaticworkJngpressureof PIPE'-_-_ L _ L.t VALVE PIPE
the water heater (150 Ibs./sq.in.) and a dischargecapacity
not lessthan thewater heater input rate as shownon theINSULATION _ _j_._ _j_INSULATION
model rating plate. (Electric heaters - watts divided by
1000x 3415 equal BTU/Hr.rate.)
Your localjurisdictional authority, while mandating the CONDUIT__3
useof a temperature-pressurerelief valve complyingwith ,' '_TEMPERATURE-
ANSIZ21.22 and ASME,may requirea valve model differ- _PRESSURE
ent from the one furnishedwith thewater heater. RELIEFVALVE
Compliancewith suchlocalrequirementsmust besatisfied
by the installer or end user of the water heater with a
locally prescribed temperature-pressure relief valve _DISCHARGEPIPE
installedin the designatedopening in the water heater in _(Do notcapor plug)
placeof the factoryfurnishedvalve.\
Forsafe operation of the water heater,the relief valve
must not be removed from it's designated opening or
pugged.
temperature-pressurerelief valvemust beinstalled
:ctly intothefitting of the water heater designatedfor
reliefvalve. Positionthe valve downward and provide
tubing sothat any dischargewill exit only within 6 inches
above, or at any distance below the structural floor. Be ! _ j
certain that no contact is made with any live electrical [6"AIRGAP
part. The dischargeopening must not be blocked or _ k, E
treducedin size underany circumstances.Excessivelength, _ =_, ,; _BF-
over 30 feet, or use of more than four etbows can cause FLOORDRAIN r
restrictionand reducethe dischargecapacityofthe valve,
No valve or other obstructionisto be placedbetween the WARNING "RELIEF VALVE OPENING"
relief valveand the tank. Do not connecttubing directlyto Thdswaterheaterispf0_ded_thar_mbmatJonTernpeca_Jr_PressureReliefValve_stedascomplyingwi_
1hesianda_dforReliefWives_uTdAutomahcGasShutoffDevicesforHotWaterSupplySYstems,AJ_SZ21.22
discharge drain unlessa 6"air gap is provided.To prevent andlhecodete_JirementsofASME.
bodily injury,hazard to life, or propertydamage,the relief Yourlocaludsdic_lof,aia_, whilernardafi_lheuseofaTemoerature-PressureRel_fVal_complying
WI_ANSZ2 22andASME,mayrequ_'eavaJvemodedrlerentfromlheonelumshedv,_hthewaterheaer
valve must be allowed to discharge water in quantities C0mpliancewJlhsuc_lccalrequirementsmustbesa_s_edbylheinslal_r_endu_r_w=_h_ter_a locallypr¢scnbedTemperature-Pressute ReliefValveir_tailed inI_e des_gnateJopeninginthe water
shouldcircumstancesdemand,If the dischargepipe is not _r
connectedto a drain or other suitablemeans, the water TANK _;l_ ,_ACK_
TANK '/__' ' BRASS
FITFING COUPLING
VALVEPROBE TEMPERATURE
The DischargePipe: MUST EXTEND PRESSURE
•Must not be smaller in size than the outlet pipe size of IN3"OTANK _ _ RELtEFVAWE
the valve, or have any reducing couplings or other BRASS
IPP 'SHANK
restrictions. _ _'_ _'_-_H
Must not be pluggedor blocked.•Ifashodshank(lessthan2")temperature=pressurereliefvalveistobeinstalled
I: Must be of materiallisted for hot water dislribution. _ _*_1,_,w_,__ _= _ ._Must be installed so as to allow complete drainage of • if a longshank(2" orlonger}isto beinstalled,do notusethe nippleand coupling
both the temperature-pressurereliefvalve,andthe dis- .=_, Temperature-PressureproteobveequipmentrequiredbyIocaJcodes,butnottessthana cc_nbma
t_onTemperature.PressureRelief VaJvecertified_smeetin the requirementsfor_elief Valves =lnd
charge pipe.Au_o_,_ GasShutoffDevicesfc_Hot-WaterSupplySysle_s,_S72122byanafionaJlyrecognized_st-
I," M ust terminate at anadequate drain. _lab°t_d°_ _hatr_a_l_tail_Pen°dieinspecb°r'ofpr°dt¢_°_ Ollisteds_uipr°entOImaterialsThevalve
mustbe oriented,prowdedwilhtubing,c_ol_eaviseinstalledsothatdischargeca_exit0nlywilhin6 inches
Must not have any valve between the relief va ve and ._o_,,oratanydistar¢ebelow_sbucturalfloor,andcannotcc_tactanyIweelecinc_rpad"
Forsafeoperat_nofIhewaterheater,IPeReliefValvemustnotberemovedor p_ugged.
tank. see manualheading=Temperature-PressureReliefValve'forinstallationand maintenanceofRelief
Valve,dischargepipeandolhelsafetyp_ecauhons