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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 be manu-
ecl with a combination temperature-pressuresrelief va ve ally operated at least once a year. Caution should be
taken to ensure that (1) no one is in front of orcertified by a 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-
Relief Valves and 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,
I If after manually operating the valve, it fails to corn-
the valve must meet the requirementsof localcodes,but pletely reset and continues to release water, immedi-
not less than a combination temperature and pressure ately close the cold water inlet to the water heater,
relief valve certified as meeting the requirements for follow the draining instructions, and replace the
Relief Valves and 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 production of listedequipmentor materials. H_OT CO<_LD
The valve must be marked with a maximum set pressure _-- _ _
not to exceedthe marked hydrostaticworkJngpressureof PIPE'-_-_ L _ L.t VALVE PIPE
the water heater (150 Ibs./sq.in.) and a dischargecapacity
not lessthan the water heater input rate as shown on the INSULATION _ _j_. _ _j_ INSULATION
model rating plate. (Electric heaters - watts divided by
1000x 3415 equal BTU/Hr.rate.)
Your local jurisdictional authority, while mandating the CONDUIT_ _ 3
use of a temperature-pressurerelief valve complyingwith ,' ' _ TEMPERATURE-
ANSI Z21.22 and ASME,may require a valve model differ- _ PRESSURE
ent from the one furnishedwith the water heater. RELIEFVALVE
Compliancewith suchlocal requirementsmust be satisfied
by the installer or end user of the water heater with a
locally prescribed temperature-pressure relief valve _ DISCHARGEPIPE
installed in the designated opening in the water heater in _(Do notcapor plug)
placeof the factoryfurnishedvalve.
\
For safe operation of the water heater, the relief valve
must not be removed from it's designated opening or
pugged.
temperature-pressure relief valve must be installed
:ctly into the fitting of the water heater designated for
relief valve. Positionthe valve downward and provide
tubing so that 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 discharge opening must not be blocked or _ k,
E
treducedin size under any circumstances.Excessivelength, _ =_, ,; _ BF-
over 30 feet, or use of more than four etbows can cause FLOORDRAIN
r
restrictionand reducethe dischargecapacityof the valve,
No valve or other obstruction isto be placedbetween the WARNING "RELIEF VALVE OPENING"
relief valve and 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 property damage,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-PressuteReliefValveir_tailedinI_e des_gnateJopeninginthe water
should circumstancesdemand, If the dischargepipe is not _r
connectedto a drain or other suitable means, 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 plugged or blocked. • Ifashodshank(lessthan2")temperature=pressurereliefvalveistobeinstalled
I : Must be of material listed for hot water dislribution. _ _*_1,_,w_,__ _= _ ._Must be installed so as to allow complete drainage of • if a longshank(2" or longer}isto beinstalled,donotusethe nippleandcoupling
both the temperature-pressurereliefvalve,andthe dis- .=_, Temperature-PressureproteobveequipmentrequiredbyIocaJcodes,butnottessthanacc_nbma
t_onTemperature.PressureRelief VaJvecertified_s meetin the requirementsfor _elief Valves =lnd
charge pipe. Au_o_,_ GasShutoffDevicesfc_Hot-WaterSupplySysle_s,_S 721 22byanafionaJlyrecognized_st-
I," M ust terminate at an adequate drain. _ lab°t_d°_ _hatr_a_l_tail_Pen°dieinspecb°r'of pr°dt¢_°_Ollisteds_uipr°entOImaterialsThe valve
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,IPeReliefValvemustnotberemovedorp_ugged.
tank. see manualheading =Temperature-PressureReliefValve' forinstallationand maintenanceof Relief
Valve,dischargepipeandolhelsafetyp_ecauhons