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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-pressuras
relief valve cer-
tiffed 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 current edition of ANSI Z21.22
,
CSA 4.4 and the code requirements
of ASHE. 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,
CSA 4.4 by a nationally
rec-
ognized testing laboratory that maintains
periodic inspec-
tion of production 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 (150 Ibs. p.s.i.) and a discharge capacity
not less than the water heater input rate as shown on the
model rating plate. (Electric heaters - watts divided by 1000
x 3412 equal BTU/Hr. rate.)
Your local jurisdictional authority, while mandating
the use
of a temperature-pressure
relief valve complying with ANSI
Z21.22,
CSA 4.4 and ASME, may require a valve model dif-
ferent from the one furnished with the water heater.
Compliance with such local requirements
must be satisfied
by the installer or end user oftbe water heater with a local-
ly prescribed temperature-pressure
relief valve installed in
the designated opening 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 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 cer-
tain that no contact is made with any live electrical part.
The discharge opening must not be blocked or reduced in
size under any circumstances.
Excessive length, 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 is to be placed between the
relief valve and the tank. Do not connect tubing directly to
discharge drain unless a 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
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 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 haveany 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 cause any
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.
HOT
COLD
SHUT-OFF
VALVE
CONDUIT
PRESSURE
RELIEF VALVE
(Do not cap or plug)
6 _ AIR GAP
WARNING
"RELIEF
VALVE OPENING"
This watelheaterispr0v_
wiL_a corn_na_0nTempela_re_Piessure RstiefVa_e lisl_ as c0mp_i_g_
thestande_d fo_RelstfVa_es and A_lomaBcGasShulofl De_lces for HotWaterSupp_ Systems,ANS Z2122
an=3 [hecodereqstrements OfASME
Y0UlI_st i_Ilsd_0IlaJ a_[holity,w_lem_;statirlgthe _seof a Tempela_le_P_ssure R St_ Vstve con'_y_ng
withANS2121 22 andASME,may requirea valvemodel d _ffe_ent fromtheoP_ ft_r_sl_d w_th the waea_ heater
C0mpi_e w_hSUCh _ caJl_,de_:nenlsmust be_t_ed
byt_e _stst_er o r _J U,_P,_
Ofthew_telheat_ w_
_o_l_/pre_ci_be_ T_psratur_Press_re Rel_f Vstve i;islalstd in _ designated op_ir_g in the water
_tel
T&P RELIEF
VALVE PROBE
MUST EXTEND
INTO TANK
• if a short shank (less than 2) tempei_ture*pressule relief valve is to be instalstd
(as sflown), a nipple_c_ coul31ing m_st be used¸
• if a _ongshank (2_or _ongel) isto be installed,do _ot t_se the nipple _nd cotJpling
Forsafe ope[atstrlofthe wate_deate_, t he Re,ofVstvemust r_of be removedor plu_ged
see manual dead_g • 'Tempelat_re•Pless_re Relief Vstve_for i_sta_latio_ an_ mair_te_anceof Relief
Vstve,discha_;epipe an_ othel salety precaut_or_s
9
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