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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 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 dischargedwill not causeany
bodily injury or property damage becausethe water may
be extremely hot.
If after manually 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.
H_OT(
SHUT-OFF
VALVE
COLD
CONDUIT
__
PRESSURE
RELIEF VALVE
(Do not cap or plug)
6" AIR GAP
WARNING
"RELIEF
VALVE OPENING"
and the codel_Ji_rnent_ OfASME
Compliance_th suchlocal iequilem_'_ts i i_st besa_sf_,dby th#instaHex ol end _sel of th_ waterheatelw_h
a locally plescribe_J T empelature*Pl_ssure R eliefValv_ installed in the designated _ning
in the watel
heater
• If a short shank (less than 2") temperaltJle.plessurereltef valve is to be installed
(_Sshown), _ nipple and coupling must be tJsed
• If _ long sha_k/2" or Io_ger) is to be instalEed, d o not use the nippEea_d coupling
Aulomat_c Gas ShutoffDc_4ces for Hot.WatclSupply Systems,ANS Z2122 by a nationally r ccognizeitcs_*
inglaboratory _hatmant_ns pcdodlc inspec_o_Ofproduction oi listedeq_prn_t or matexials The valve
m_s_beodente_J, prov_ed _lh tubing, ol ot_er_se inst_ledso that dischal_ecmq ex_only w_hi_6 inches
above, Orat a_y dis_anc_ b_ow the s_ructural flocl,and cannot c ontact any I_ve clcctrlcalpar[¸"
Fol safeopclat_on o f _hcwa_elbeatel,_hcReliefVa_e m_s_ r_t be icmovedor pl_gecd
See mant_alhcadin_- =Temperat_rc*PiessuleRelief Valve" fol installatJon and ma_n_enanc_ oi Relief
Va_c, d_SChargc _ipe and othersafe_y precat_ons
9
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