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Installation
Instructions
(cont'd)
Temperature-Pressure
Relief Valve
AWARNING
At the time of manufacture this water heater was provided
with a combinationtemperature-pressures relief valve certified
by a nationally recognized testing laboratory that maintains
periodic inspectionof productionof listed equipment or mate-
rials, as meeting the requirements
for Relief Valves and
Automatic Gas ShutoffDevicesfor Hot Water SupplySystems,
and the latest edition of ANSI Z21.22 and the code require-
ments of ASME. If replaced,the valve must meat the require-
ments of localcodes,but not lessthan a combinationtempera-
ture and pressurerelief valve certified as meeting the requi_-
ments for Relief Valvesand Automatic Gas Shutoff Devicesfor
Hot Water SupplySystems, A NSI Z21.22 bya nationally recog-
nized testing laboratory thut maintainsperiodic inspectionof
_roduction of listedequipmentor materials.
The valve must he marked with a maximum set pressurenot
to exceed the marked hydrostatic working pressure of the
water heater (150 IbsJsq. i n.) and a discharge capacitynot less
than the water heater inputrate as shownon the model rating
plate. (Electric heaters • watts divided by 1000 x 3415 equal
BTU/Hr. rate.)
Yourlocaljurisdictional_thority, while mandatingthe useof a
temperature-pressurerelief valve complyingwith ANSI Z21.22
and ASME, may require a valve model different from the one
fomished with the water heater.
Compliancewith suchlocalrequirements must be satisfiedby
the installeror end user of the water heater with a locallypre-
scribed temperature-pressurerelief valve installedin the desig-
nated openingin the water heater in placeof the factory fur-
nishedvalve.
For safeoperationof the water heater,the relief valvemust not
he removedfrom it'sdesignated openingor plugged.
The temperature-pressure relief valve must he installeddirectly
into the fittingof the water heater designated for the relief vahre.
Positionthe valve downwardand providetubingsothat any dis-
chargewill exit only within 6 inchesabove,or at any distance
below the structural floor. Be certain that no contact is made
with any liveelec_cal part. The discharge openingmust not be
Mockedor reduced in size under any circumstances. E xcessive
length,over 30 feet, or useof more than four elbowscan cause
restrictionandreducethe discharge capacityofthe valve.
No valveor other obstructionisto he placedbetween the relief
valveand the tank. Do not connecttubing directlyto discharge
drainunless a 6" air gapis provided. T opreventbodilyinjury,haz-
ard to life, or property damage,the relief valve must he allowed
to discharge water in quantitiesshouldcircumstances d emand.If
the discharge pipe is not connectedto a drain or other suitable
means, t he water flow may cause propertydamage.
The DischargePipe:
Must not be smaller in size than the outlet pipe size of the
valve,or haveany reducingcouplings or other restrictions.
Must not be pluggedor blocked.
Must he of material listedfor hot water distribution.
Must be installedso as to allow complete drainage of both
the temperature-pressure relief valve, and the discharge
pipe.
Mustterminate at an adequatedrain.
Must not haveany valvebetween the relief valve and tank.
AWARNING
The temperature-pressure relief valve must be manually
operated at least once a year. Caution should be 'mlconto
ensure that (I) on one is in front of or around the outlet of
the temperature-pressure relief valve dischargeline, and (2)
the water manually discharged will 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 dose the
cold water inlet to the water heater, follow the draining
instructions, and replace the temperature-pressure relief
valvewith a now one.
VALVE
PRESSURE
RELIEF
VALVE
[]
(Do not cap or plug)
6" AIR GAP
FLOOR
DRAIN
RELIEFVALVEOPENING
At the time of manufacture, this water heater was provided wi_ a c0mbinarion tem-
perature-pressure relief v_ve listedas complying with the stinderdfor relief valves and
automatic gasshut-off de_ces for hot water supply systems, A NSI Z21.22. For safe
operarionof the water heater,the relief valvemust not be removed from its designated
_i_
of installation or plugged,
ur Iool jutisdicdonal a uthori_, while mandatingthe useof a temperatur_pre_sure
retief valvecomplying with ANSI Z21.22 andASHE mayrequire a valvemodeldifferent
from the o_e furnished with the water heater
Compliancewith suchlocalrequirements must be satisfied bythe installer o r end user
of the wau_rheaterwith a Iocabyprescribed temperature-pressure relief valve installed
in the designated opening in the water be_te_
See manualhe_ding-'_lemberature-Pressure Relief Valves"for installarion andmainte-
nanceof relief valve,discharge line, andother safe_ precautions.
12
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