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Installation
nstructions (cont'd)
Temperature-Pressure
Relief Valve
_kWARNING
At the time of manufacture this water heater was provid-
ed with a combination temperature-pressures relief valve
certified by a nationally recognized testing laboratory that
maintains periodic inspection of production of listed equip-
ment or materials, as meeting the requirements for Relief
Valves and Automatic Gas Shutoff Devices for 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 Relief Valves and
Automatic Gas Shutoff Devices for Hot Water Supply
Systems, ANSI Z21.22 by a nationally recognized testing
laboratory that maintains periodic inspection of produc-
tion of listed equipment or materials.
The valve must be marked with a maximum set pressure
not to exceed the marked hydrostatic working pressure of
the water heater (i 50 lbs.lsq, in.) and a discharge capacity
not lessthan the water heater input rate as shown on the
model rating plate. (Electric heaters - watts divided by
1000x 3415 equal BTU/Hr. rate.)
Your local jurisdictional authority, while mandating the use
of a temperature-pressure relief valve complying with
ANS! Z21.22 and ASME, may require a valve model differ-
ent from the one furnished with the water heater.
Compliance with such local requirements must be satisfied
by the installer or end user of the water heater with a
locally prescribed temperature-pressure relief valve
installed in the designated opening in the water heater in
place ofthe 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 designated for
the relief valve. Position the valve downward and provide
tubing so that any discharge will exit only within 6 inches
above, or at any distance below the structural floor. Be
certain that no contact is made with any live electrical
_art. The discharge opening must not be blocked or
reduced in size under any circumstances. Excessivelength,
over 30 feet, or use of more than four elbows can cause
restriction and reduce the discharge capacity of the valve.
No valve or other obstruction isto be placed between the
relief valve and the tank. Do not connect tubing directly to
discharge drain unlessa 6" air gap is provided. To prevent
bodily injury, hazard to llfe, or property damage, the relief
valve must be allowed to discharge water in quantities
should circumstances demand. If the discharge pipe is not
connected to a drain or other suitable means, the water
flow may cause property damage.
The Discharge Pipe:
-- 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 plugged or blocked.
Must be of material listed for hot water distribution.
Must be installed so asto allow complete drainage of
both the temperature-pressure relief valve, and the dis-
charge pipe.
-- Must terminate at an adequate drain.
Must not have any valve between the relief valve and
tank.
_I_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 discharged will not cause any
bodily injury or property damage because the water may
be extremely hot.
If after manuaUy operating the valve, it fails to complete-
ly reset and continues to release water, immediately,
close the cold water inlet to the water heater, follow the
draining instructions, and replace the temperature.pres-
sure relief valve with a new one.
HOT COLD
HOT COLD
PRESSURE
RELIEF VALVE
DISCHARGE PIPE
(Do not cap or plug)
6"AIR GAP
FLOOR DRAIN
WARNING "RELIEF VALVE OPENING"
Taiswaterheaterisprevid_ w_ha earabinalionTempara_J=e-Pres_uraReliefValvelisledas_m_lying with
Ihestandardfor Ral;efValvasa_ AutomaticGasSh_tdfDevicesfarHotWaistSupplySystems,ANSZ2.1.22
and the coda requiremenls of ASME.
Your toca! j_dsdlcheaat author,i, while masdating the use of a Tempei'atul'e-P_'essare Relief VaJve complying
wJLhANSZ21.22andASME, mayrequirea valvemeuefd_ereallrotn_,eonefamished_ithth_waterheater.
Compliancewit_suohlocalrequirementsm_l be satisfiedbythe ieslaIlatorecduserafthe water_eatarv_
a lasalJy prescribed Temperalure-Frsss,_re Relief Valve inalalled in the designated opening in the water"
heater.
TANKI;"i: :' _:;' _?,:1JACKET
FiR'_ COUPLINGl{'_ f'_
T&P RELIEF
_1111 a-.-_UlIII!_11I i111;_'TEMPERATURE-VALVE PROSE
MUSTEXTEND_tl!lll ,-_UtlIIIIII, LJ ti_t'',_PRESSURE
INTOTANK L_t_j_______________, t _ RELIEFVALVE
NIPPLE _:.,,.; !-, "_EitGTH
=' tf a short shank (less than 2'} temperature.pressure relief valve is to be [natalJed
(asshown}, a nipple andcoupling must beused.
** if a ices shank (2"ot longer) Lstobe installed,de net use thenipple andcou#ting.
"install Temperature-Pressure Fotective equipment roqekad by leeaJ codes, but not lass theP, a combi_qa-
tion Temperathre-Pressare Relief Valve certi|ied as meeting the Iequiremeats far Relief V_lvas and
AutomaticGasShuto_Devbesk,r Hot-WaterSupplySystems,AN-e,Z21.22bya nationallyreeafnizedtest-
ir,glaboratorythatmaintainspefiodioinspectior,c{pred'..=c_iasof Iistedequipmentormaterials.Thevalve
must be oriented, p[evMed w_ tubing, or ether,vise installed so that discharge can exit ea_ within 6 inches
above,orat&qydistanceheIow_e siructuraJgear,andcannotcontactanyliaeafect_'calpad."
Forsafeoperationof_e waferhealer,theReliefVaJvemustnet beremovedel pl'agged.
See manual heading - "Tam,ee/atere-Pressure Relief Valve ° tar installation arid raaintenanee el Relief
VaIve, discha_'ge pipe and ethe_"safely _reeaut_on&
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