Temperature-Pressure Relief Valve - Maytag HE21240S User Manual

Instructions for Installation (cont'd)
Temperature-Pressure Relief Valve
•,WARNING _, WARNING
At the time of manufacture this water heater was provid- The temperature-pressure relief valve must be manu-
ed with a combination temperature-pressuresrelief valve ally operated at least once a year. Caution should be
certified by a nationally recognizedtesting laboratory that taken to ensure that (1) no one is in front of or
maintains periodic inspectton of production of listed around the outlet of the temperature-pressuro relief
equipment or materials, as meeting the requirements for valve discharge line. and (2) the water manually dis-
Relief Valves and Automatic Gas Shutoff Devicesfor Hot charged will not cause any bodily injury or property
Water Supply Systems. and the latest edition of ANSI damage because the water may be extremely hot.
Z21.22 and the code requirements of ASME. If replaced. If after manually operating the valve, it fails to com-
the valve must meet the requirements of local codes, but
pletely reset and continues to release water, immedi-
not less than a combination temperature and pressure ateiy close the cold water inlet to the water heater.
relief valve certified as meeting the requirements for follow the draining instructions, and replace the
Relief Valves and Automatic Gas Shutoff Devicesfor Hot temperature-pressure relief valve with a new one.
Water Supply Systems.ANSI Z21.22 by a nationally recog-
nized testing laboratory that maintainsperiodic inspection _ __
HOT COLD
of production of listed equipment or materials. )__T
The valve must be marked with a maximum set pressure _ " SHUT-OFF
not to exceedthe marked hydrostaticworking pressureof
the water heater (150 Ibs./sq. in.) and a dischargecapacity PIPE_ _ _ -- PIPE
not lessthan the water heater input rate as shown on the INSULATION _ INSULATION
model rating plate. (Electric heaters - watts divided by
1000 x 3415 equal BTU/Hr.rate.)
Your local jurisdictional authority, while mandating the CONDUIT
useof a temperature-pressure relief valve complying with I ]
ANSI Z21.22 and ASME. may require a valve model differ- _ /TEMPERATURE-PRESSURE
ent from the one furnished with the water heater. RELIEF V ALVE
Compliancewith suchlocal requirements must foesatisfied
by the installer or end user of the water heater with a
locally prescribed temperature-pressure relief valve ¢-- DISCHARGE PIPE
installed in the designated opening in the water heater in _(Do notcapor plug)
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. Positionthe valve downward and provide
tubing so that any dischargewill 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 ( 6'_AIRGAP
part. The discharge opening must not be blocked or _ _ ml
r_luced in size under any circumstances. Excessive length, _ _
r
over 30 feet, or use of more than four elbows can cause FLOOR DRAIN
restriction and reducethe dischargecapacity of the valve.
No valve or other obstruction is to be placed between the WARNING "RELIEF VALVE OPENING"
relief valve and the tank. Do not connecttubing directly to T_._ _._o_._T_P_ _v_ ._
Ibe sta_ for RelCf Vak_s andAutoma_c G as ShUtOff Devices forHot WaterSupPly Sy_i_s_,_1 22
discharge drain unless a 6" air gap is provided. To prevent andlt_codereo_rementsofASME,
ANSI_ 122 andASME,may requirearave rnc_ dC_ferent trc_n the c_efurnished wilhthe water heate_
bodilyinjury,
h azard to
life, or property
damage, the relief Yo_ localunsctct_w,aJ _ wr_lerna_Ung _ useof aTer_ture-Pressule ReliefVaIW complying
valve must be allowed to discharge water in quantities C_rn_ianc_i1hsuch_a_r_qu_rementsr_ustbes_tis_edby1be_ta_re
a locallypcescribed Terrperature-Pressure R elief VaJve insialJed in the bes_g h atedopeningi_ 1hewater
should circumstances demand. If the dischargepipe is not _r
connected to a drain or other suitable means, the water
TANK, %', _" JACKET
TANK • l- BRASS
flow may causeproperty damage. FnT_G COUPLING
The DischargePipe:
T&P RELIEF _i&_
VALVE PROBE TEMPERATURE-
MUST EXTEND PRESSURE
• Must notbe smaller in size than the outlet pipe size of
INTO TANK RELIEF VALVE
the valve, or have any reducing couplings or other i_, _t
' SHANK
restrictions. _ [_ _ _GTH
•
Must not be plugged or blocked.
• If a short shank (Jessthan 2') temperature-pressurereliefvalve is to be instated
• Must be of material listedfor hot water distribution. (as s hown),a nippleand coupling mustbeused
•
iust be installed so as to allow cornplete drainage of
• if a longs_lank(2" or longer) is to be installed,do not usethe nippleand coupling.
both the temperature-pressure relief valve, and the dis-
",r,_ Temperalure.Pressure protective equipment r equired by localcodes, b_t notlessthan a combina-
tion Temperatule-Pressure Relief Valve Cedriiedas meetingthe requbemenlS for Relief Valves and
charge pipe.
A_o_=_ Gas ShttoffDevices forHot-Wat0rSupply Systems, AN_ Z2_22 bya nJt_nallyrecognLzed test-
• Must terminate at an adequate drain, must be c _ented.pmv_edwi_tubing, or 0 the_iseinstabeds01hatdischa_ecan ex_onFf wii_in 6incbes
• Must not have any valve between the relief valve and above, ofatanydlstancebdowtbestrdcturaJflcot, a_dcannotcontactanyflveei_icalpa,."
For safe 0bera_n of the wsle_ heater,b_eReliefVaJve m ustnotbe lem0vedorp_u ed.
tank,
See manual heading- "Ternperatule-Pr e_su re Relief Valve"for installabon an_gmeaintenance of Relief
VaJv_, d ischarge p ipeandothersafetywecautJ0ns
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