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Installation
Instructions
(cont'd)
Temperature-Pressure
Relief Valve
,&WARNING
At the time of manufacture this water heater was provided
with a combination temperature-pressuresrelief valve cer-
tified by a nationally recognized testing laboratory that
maintains periodic inspectionof production of listed equip-
ment or materials, as meeting the requirements for Relief
Valvesand Automatic Gas Shutoff Devicesfor Hot Water
Supply Systems,and the latest edition of ANSI Z21.22 and
the code requirements
of ASME. If replaced, the valve
must meet the requirements of local codes, but not less
than a combination temperature and pressure relief valve
certified as meeting the requirements for ReliefValvesand
Automatic Gas Shutoff Devices for Hot Water Supply
Systems, ANSI Z21.22 by a nationally recognized testing
laboratory that maintains periodic inspectionof production
of listed equipment or 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 divided by
1000 x 3415 equal BTU/Hr. rate.)
Your local jurisdictionalauthority, while mandating the use
of a temperature-pressure
relief valve complying with
ANSI 721.22 and ASME, may require a valve model differ-
ent from the one furnishedwith the water heater.
Compliance with such local requirements must be satisfied
_y the installer or end user of the water heater with a
ocally prescribed temperature-pressure
relief valve
nstalled in the designatedopening in the water heater in
place of the factory furnished valve.
For safe operation of the water heater, the relief valve
must not be removed from it's designated opening or
plugged.
The temperature-pressure relief valve must be installed
directly into the fitting of the water heater designatedfor
the relief valve. Position the valve downward and provide
tubing so that any dischargewill exit only within 6 inches
above, or at any distancebelow the structural floor. Be cer-
tain that no contact is made with any live electrical part.
The dischargeopening must not be blocked or reduced in
size under any circumstances. Excessivelength, over 30
feet, or useof more than four elbowscancause restriction
and reduce the dischargecapacityof the valve.
No valve or other obstruction is to be placed between the
relief valve and the tank. Do not connect tubing directly to
dischargedrain unlessa 6" air gap is provided.To prevent
bodilyinjury, hazard to life, or property damage, the relief
valve must be allowed to discharge water in quantities
should circumstancesdemand. If the dischargepipe is not
connected to a drain or other suitable means, the water
flow may causeproperty damage.
The DischargePipe:
Must not be smaller in size than the outlet pipe size of
the valve, or have any reducing couplings or other
restriction.
Must not be pluggedor blocked.
Must be of material listed for hot water distribution.
Must be installed so as to allow complete drainage of
both the temperature-pressure relief valve, and the dis-
chargepipe.
Must terminate at an adequate drain.
Must not have any valve between the relief valve and
tank.
,&WARNING
The temperature-pressure relief valve must be manually
operated at least once a year. Caution should be taken to
ensure that (I) no one is in front of or around the outlet
of the temperature-pressure relief valve discharge line,
and (2) the water manually dischargedwill not causeany
bodily injury or property damage because the water may
be extremely hot.
If after manually operating the valve, it fails to 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-pressure
relief valve with a new one.
9
HOT
HOT
COLD
E.
PRESSURE
RELIEF VALVE
E
(Do not cap or plug)
WARNING
"RELIEF
VALVE OPENING"
_,,s witet heaterb provlded wi'ha combinaUon Temperature-PP",=_sute
P_ief Valvellsted asas comp,y_ _th
thestandard
iorP,_f Valves and A_omalic Gas Shtoff _ nces tarP,_Water S upply $yste'_s, AN__122
andthe codereq_Jremerds
ofASME
Y_r local rf_ional author_,v_le ritar_b'lg theuseo__ Temperate-Pressure RelielVa_ complying
*ith,_S ;_ 22and A_E, may rngu_a,_
moder difterer_
Iromthe c,_e _Jr_ed _ _ w_r _r
C0mptancevAth suchlocaln_u_ements mustbe sat s Sedbytheinstalerorend_
ofthe wat_ healerwith
a locally p,escril_dTemberatute-Pre_ute Refel Val_ instaJled i n thedesig_ted openingin 1bewalei
JACKET
TANK
BRASS
COUPLING
T&P RELIEF
VALVE PROBE
_TEMPERATURE-
PRESSURE
INTO TANK
I RELIEF VALVE
T&P
BRASS _
SHANK
NIPPLE
LENGTH
• I1 a shorl stlank (_essthan2") temperature-pressurerelief valve is to be installed
(as shown),a nipple and couplingmust beused
• If a long shank; ( 2' or longer) is to be installed, donot useIhe nippleand coupling
=Install T emperature-Presses prate:tireequipt_nt required by k:,c a l cedes bulnot lessthan a coml_na-
lion Tempetalure-Pressera ReliefValve certifiedas meeting the requirementsfor Relief Valvesand
Autoreatic G as Sh_offDevtces forHal-Water Supp'ySystems, ANSZ2_22 bya nat_'lallyrecognized t est-
inglaboratory t hat maJr_r_ pedodic it_specli0_OfproductK)n o flisted equ_rn_l or rnatenaqs 131e valve
muslbe onantsd, p ,ovid_ withlUbng,o_othenvtseinstzlled sothatd_harge ca_ exilc_lywdl_n 6 inches
above,orat anydislar_ below thestruc_ura_
to3r, andcanno_ c onlaCl artylivee_eclr_al pad•
Forsafeoperation ofIt_ waistheater,theReliefValvemustPot be ,emovedor plugged
See manual heed_g. "Temperature-Pressule R eliefValve"for installation andmaintenanceol Relief
Valve,diS_hai_e p _peandother s afelypr_attic_s
6" AIR GAP
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