Installation Instructions (cont'd)
Temperature-Pressure
Relief Valve
AWARNING
At the time of manufacture this water heater was provid-
ed with acombination temperature-pressures relief valve
certified by a nationallyrecognized testing laboratory that
maintains periodic inspection of production of listed
equipment or materials, as meeting the requirements for
ReliefValves and 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 localcodes, but
not less than a combination temperature and pressure
relief valve certified as meeting the requirements for
ReliefValves and Automatic Gas Shutoff Devicesfor Hot
Water SupplySystems, ANSI Z21.22 by a nationally recog-
nized testing laboratory that maintains periodic inspection
ofproduction of listed equipment or materials.
The valve must be marked with a maximum set pressure
not to exceed the marked hydrostatic working pressureof
the water heater (150 IbsJsq.in,) and adischarge capacity
not lessthan the water beater input rate as shown on the
model rating plate, (Electric heaters - watts divided by
1000x 3415 equal BTU/Hr. rate.)
Yourlocal jurisdictional authority, while mandating the use
of atemperature-pressure relief valve complying with
ANSI Z21.22 and ASME, may require avalve model differ-
ent from the onefurnished with the water beater.
Compliance with such local requirements must be satis-
fredby the installer or end user ofthe water heater with a
locally prescribed temperature-pressure relief valve
installed in the designated opening in the water heater in
placeof 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 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
part. 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 valveor other obstruction is to be placed between the
relief valveand the tank. Do not connecttubing 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
shouldcircumstances demand. If the dischargepipe is not
connected to adrain or other suitable means, the water
flowmay cause property damage.
The DischargePipe:
Must not be smaller insize than the outlet pipesize 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
beth the temperature-pressure relief valve, andthe dis-
chargepipe.
Mustterminate at an adequate drain.
Mustnot haveanywdvebetween therelief wdve andtank.
_,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 causeany
bodilyinjury or property damage becausethe water may
be extremely hot.
Ifefter manually operating the valve, it failsto complete-
ly reset and continues to release water, immediately,
closethe cold water inlet to the water heater, follow the
draining instructions, and replace the temperature-pres.
surerelief valve with a new one.
COLD
,.,(---
SHUT-OFF
VALVE
CONDUIT f
TEMPERATURE-
PRESSURE
_ _'RELIEF VALVE
(Do not €_o
Ao-u,,WARNING "RELIEF VALVE OPENING"
heat_
TANK i;"_;, !: JACKET
•f. BRASS
TANK COUpUN G
T&PREUEF
VALVEPROBE TEMPERATURE-
MUST EXTEND PRESSURE
INTO TANK RELIEF VALVE
NI ,.tSHANK
e ff a shod _a_ (le_ Eqan2') _un_pressgre lelief valve _to be irtStalled
(as_orm),an_ole_dC<X_,_mustbeus_
• IfaIo_ sl.,a_(2' o_lor,geOIstobe i_sta_d, dono_use_enipf_ a_dcc_,#i_.
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nmtbeo_d, po,4_d wi_lubing,orothe_v__ thatdi_arge_ _,_ ody.ith_ 6_ches !