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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-pressures relief valvecer-
tified by a nationally recognized testing laboratory that
maintains periodic inspectionof production of listedequip-
ment or materials, as meeting the requirements for Relief
Valvesand Automatic Gas Shutoff Devicesfor Hot Water
SupplySystems,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 Ibsdsq.in.) and a dischargecapacity
not lessthan the water heater input rate as shownon the
model rating plate. (Electric heaters, watts divided by
1000x 3415 equal BTU/Hr. rate.)
Your localjurisdictional authority, while mandatingthe use
of a temperature-pressure relief valve complying with
ANSI Z21.22 and ASME, may require a valve model differ-
ent from the one furnishedwith the water heater.
Compliance with such local requirements must be satisfied
by the installer or end user of the water heater with a
locally prescribed temperature-pressure
rehef valve
installed in the designatedopening in the water heater in
place of the factory furnishedvalve.
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. Positionthe 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. Excessive length, over 30
feet, or useof more than four elbowscan causerestriction
and reducethe discharge capacity of 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
bodily injury, hazard to life, or property damage, the relief
valve must be allowed to discharge water in quantities
shouldcircumstancesdemand. If the dischargepipe is not
connected to a drain or other suitable means, the water
flow may causeproperty damage.
The DischargePipe:
Must not he 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 listedfor hot water distribution.
Must be installed so as to 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
tan_
9
AWARNING
The temperature-pressure relief valve must be manually
operated at least once a year. Caution shouldbe 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
bodily injury or property damage becausethe water may
be extremely hot.
If after manually operating the valve, it failsto 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.
H_OT I
COLD
.<-.-
SHUT-OFF
VALVE
PRESSURE
RELIEF VALVE
(Do not cap or plug)
6" AIR GAP
FLOOR DRAIN
WARNING
"RELIEF VALVE OPENING"
tt_m_,_d _ _l_f v_
and Autor_c Gas S_tollD_¢_ _ HOf war _ _
_°°q_l_
_
_ME.
•
Y0_k_
"
_',orify, *Hiemanm_ng h_ me ofa TerrC_ramre_°res,_re
I_e_fValve ¢ mP,Y, ng
TANK :_' '\_,
!'
JACKET
TANK
* '1, _
BRASS
FITT
G
COUPLING
T&P RELIEF
_
VALVE PROBE
TEMPERATURE-
MUST E<TEND
PRESSURE
INTO TANK
,
RELIEF VALVE
1/." x /,'
• If a sho_ shank (less than 2') temperature-pressuren_lief valve is Io be installed
(asshown), a n_pp_e a nd ccupling n _Jst b e ueed.
• If a Io_g shank (2" or Io_er) Is to be installed,do not use6_e ofpple andcoupifng
•lr_aif Tempe_urePressurepro_Az_eequipment require_ bylocal o0Oes,bulnotlessthana ¢etina-
bon Temperatu_Pressure Relief VaNe certifiedas ri_e_n the {equirements for ReliefVah/es af_l
Aut0n-a_Gas Shu_ D_CeS kx Hot-Water S upply Systems, _ '_S Z2122 _ a r, a tior_'=y r eco_zz_ _ -
mustb_ermnted, p _ovi_KIv_htub_, _ o_e_i_
inmlledso_at disease _n ex_ 0r_y_n
B_
_ove, _ at m_ydimn_ belo_them_uraJ fl0¢{, a nd¢ann_ 0or_a_anyI_ ek_n_l _.
F0_safe_
of _hewate¢he_t_, _e I_i_ Val_ mustr_ be lemoved_ if_
See mlnual heading- "Temperer ure-Pressu!eRet_ef V alve" for installaEon a _ mainte_nce of Relief
Vofve, _lscha,ge pipe andog',er safety p rer.,au',w)ns.
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