Instructions for Installation (cont'd)
Temperature-Pressure Relief Valve
A, WARNING I _, WARNING
At the timeof manufacturethis water heater was provid- The temperature-pressure relief valvemust be manu-
ed with a combinationtemperature-pressuresrelief valve I ally operated at least once a year. Caution should be
taken to ensure that (1) no one is in front of or
certified by a nationally recognizedtesting laboratory that I
maintains periodic inspection of production of listed I around the outlet of thetemperature-pressure relief
equipment or materials, as meeting the requirements for valve discharge line, and (2) the water manually dis-
Relief Valvesand Automatic Gas Shutoff Devicesfor Hot charged will not causeany bodily injury or property
Water Supply Systems, and thelatest edition of ANSI damage because the water may be extremely hot.
Z21.22 and the code requirements of ASME. If replaced,If after manually operating the valve, it fails to com-
the valve must meet the requirementsof localcodes,but pletely reset and continues to release water, immedi-
not lessthan a combination temperatureand pressure ately close thecold water inlet to the water heater,
relief valve certified as meeting the requirements for follow the draining instructions, and replace the
Relief Valvesand Automatic Gas Shutoff Devicesfor Hot temperature-pressure relief valve with a new one.
Water Supply Systems,ANSI Z21.22 by a nationally recog- I
nized testing laboratory that maintainsperiodicinspection!
of productionof listedequipmentor materials. ! _ _11 t, C(OLD
The valve must be marked with a maximum set pressure
not to exceedthe marked hydrostaticworking pressureof
the water heater (150 Ibs./sq.in.) and a dischargecapacity
notlessthan the water heater input rate asshown on the
model rating plate. (Electricheaters -watts divided by L1000x 3415equal BTU/Hr.rate.)
Your local jurisdictional authority, while mandating the
useof a temperature-pressurerelief valve complyingwith CONDUIT
ANSIZ21.22 and ASME,may require a valve model differ-TEMPERATURE-
ent from the one furnishedwith the water heater. _PRESSURE
Compliancewith suchlocalrequirements mustbesatisfied RELIEFVALVE
by theinstaller or end user of the water heater with a
Iocallyprescribed temperature-pressurerelief valve _-DISCHARGEPIPE
installedin the designatedopening in the water heater in _(Donotcapor plug)
placeof the factory furnishedvalve.
Forsafe operation of the water heater, therelief valve
must notberemoved from it's designated opening or
plugged.
The temperature-pressurerelief valve must be installed
directly intothe fitting of the water heater designatedfor
the relief valve. Positionthe valve downward and provide
tubing sothat any dischargewill exit only within 6 inches
above, or at any distancebelow thestructural floor. Be
certain that no contact is made with any live electrical _-_
part. Thedischarge opening must not be blocked or m6"AIRGAP
reducedin sizeunder any circumstances.Excessivelength, _-
over 30 feet, or useof more than four elbows cancause FLOORDRAIN V
restrictionand reducethe dischargecapacityof the valve.
No valve or other obstructionisto be placedbetween the 1NARNING "RELIEF VALVE OPENING"
N _eq _ Re_v_w4_dAu_n_c_ Shu_eDoves_H_W_S_/SyCe_An_1.22
relief valveand the tank.Do not connecttubing directly to _lis waterheater_pr0v_eqw_ a _ Te,_0etat0_RdiefV_ve Istedasco " w_
dischargedrain unlessa 6 air gap isprovided.Toprevent _,o0_q_ofAS,E
_AI_ANS_1,_ andASME,m_requ_ea valvemodal_ifemntfromIhe one_umish_d_ _ _ _.bodily injury, hazard to life,or property damage,the relief_,_ _o_,_,_m,_u,u_of aTe_,*P_umP_V_
valvemust be allowed to dischargewater in quantities _._._._mu=_,_._of_._.._
_pre,_db_Temperllture-P_e_ureReliefValve install_inthedes_gn_ed_ening in_.e water
should circumstances demand. If the discharge pipe isnot
_J_RCoA_SpE_LINGTANK;_'_'_,_,!:JACKET
connected to a drain or other suitable means, the water ,_:,-, BRASS
TAT-NFKG COUPLING
flow may cause property damage. _.,.Z_l,_rF;_rlz_r-_.1% _
The DischargePipe: T&PREUEF
VALVEPROBE _ _IEMPERATURE-
MUST EXTEND PRESSURE
•Must notbe smaller in sizethan the outlet pipesize ofINTO TANK RELIEFVALVE
the valve, or have any reducing couplings or other _v,._,_,.
restrictions. NIPPLE |%_ .L_Ei_'_
• Must not beplugged or blocked. . ifashortshirk(lecSfflaf12.)tenlpe_tu_Ppressurer_tefvldveistobeinstalled
Must be of material listedfor hot water distribution. (,.shown),=nippleandCOUl:41ngmustbeused.
Must be installed so as to allow complete drainage of "Ifal°hg_laflk(2_°rl°rlgef)ist°beh"stalled'd°n°tuseth°hipp_eandC°_l_i_"
both the temperature-pressurerelief valve,and the dis-"InStallTemeqra_ur_-Fressurepcotec_eequipmentrequiredby localcodes_butnotless_hana c¢_nbina-
tionTemeqrature-PressareRelief Valvec_rtified&smeetin 1herequirementsfor ReliefValvesand
charge pipe. _ R.S_ _= _,.=.w==Su_s_.,_sz__ by.,,0_,.,0_ _=-
ingliu_iSocy _maintains " icinspe_onof p_oflistedeqJpme_or maledals,The valve
Must terminate at an adequate drain, mustbecdeflteq,p_ovtdeq_°d_b/_,orothen_tsew_leqsolhatalschaxgecane_onlywflhin_alches
above,or atar_'distancebdow 1healzucturalfloor,andcannotc_act anylivealecb_d pa_t."
•Must not have any valve between the relief valve and Fcrsafeo_ofthewalsrheatsr,lheRdietValvemustnoteqrefnoveqc_:.
tank.see manualheading- "Temperaturs-Pressure R_f Valve' forinstallalJonan_eql_ntenanceof Relief
12