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Installation
Instructions
(cont'd)
Temperature-Pressure
Relief Valve
A WARNING
At the time of manufacture this water heater was provided
with a combination temperature-pressures relief valvecertified
by a nationally recognized testing laboratory that maintains
periodic inspectionof productionof listed equipment or mute-
rials, as meeting the requirements
for Relief Valves and
Automatic Gas Shutoff Devicesfor Hot Water SupplySystems,
and the latest edition of ANSI Z21.22 and the code require-
ments of ASME. If replaced, the valve must meet the require-
ments of localcedes,but net lessthan a combinationtempera-
ture and pressure relief valve certified as meeting the require-
meritsfor ReliefValvesand Automatic Gas Shutoff Devicesfor
Hot Water SupplySystems,ANSI Z21.22 by a nationally recog.
nized testing laboratory that maintains periodic inspectionof
productionuf list_l equipment or material_
The _lve must be mark_ wi_ a meximum set pressuronot
to exceed the marked hydrostatic working pressure of the
water heater (150 IbsJsq. i n.) and a dischargecapacitynet less
than the water heater input rate as shownon the model rating
plate. (Electric heaters • watts divided by 1000 x 3415 equal
BTU/Hr. rate.)
Your localjurisdictionalauthority,while mandatingthe useof a
temperature-pressure relief valve complyingwith ANSI 7.21.22
and ASME, may require a valve model different from the one
furnishedwith the water heater.
Compliancewith suchIoc_ requirements must be satisfiedby
the installeror end user of the water heater with a locallypre-
scribedtemperaturo-prossuro relief wdve instadl_d in the desig-
nuted opening in the water heater in place of the factory fur-
nishedvalve.
For safeoperationof the water heater,the relief valve must no_
be removedfrom it'sdesignatedopeningor plugged.
The temperature-pressure relief valve must be installeddirectly
into the fittingef the water hexter designated fer the reliefvalve.
Positionthe valve downwardand providetubingsothat anydis-
chargewill exit only within 6 inchesabove,or at any distance
below the structural floor. Be certain that no contact is made
with any liveelectricalpart. The discharge openingmust not be
blockedor reducedin size under any circumstances.Excessive
length,over 30 feet, or useof more than four elbowscan cause
restrictionand reducethe discharge capacityoftbe valve.
No wive or other obstructionisto be placed between the relief
valve andthe tank. Do net connecttubingdirectlyto discharge
drainunlessa 6" air gapis provided. T o preventbodilyinjury,haz-
ard to life, or property damage,the relief valvemust be allowed
to dischargewater in quantitiesshouldcircumstances d emand.If
the discharge pipeis not connectedto a drain or other suitable
means,the water flow may cause propertydamage.
The DischargePipe:
Must net be smaller in size than the outlet pipe size of the
valve,or haveanyreducingcouplings or other restrictions.
Must not be pluggedor blocked.
Must beof material listedfor hot water distribution.
Must be installedso as to allow complete drainageof both
the temperature-pressure relief valve, and the discharge
pipe.
Must terminate at an adequate drain.
Must net haveany valvebetween the relief valveand tank.
AWARNING
The temperature-pressure relief valve must be manually
operotod at least once a ye_ Caution shouldbe taken to
ensurethat (I) no one is in frant of or around the oudet 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 continuesto release water, immediately dose the
cold water inlet to the water heater, follow the draining
instructions, and replace the temperature-pressure relief
valvewlth a new one.
HOT
TEMPERATURE-PRESSURE
RELIEF VALVE
/
DISCHARGEPiPE
plug)
PROVIDE A 6" AIR
GAP BETWEEN THE
END OF THE
DISCHARGE PIPE
AND DRAIN
RELIEFVALVE OPENING
Atthe timeofmanufacture,
thiswater h eater v_sprovided
with acombination
ter_
peratum-pressure
relief v abe l isted
as complying
with the standard
forrelief valves and
automatic ipsthut-off d evtce_
for hot
water supply
systems.
ANSI ; [21.22. For safe
operation
of_e water h eater, therelief _
must notberemoved from its
designated
point
ofinstadation
or plul_ed,
Your l ocal
iuri_ctional authority, w hile mandating
the use ofatemperature-pressure
relief _ahe
c omplying
with ANSI 7.21.22 and ASME. may
require a
valve m_eldilferem
from theone furnished
with thewater heart
Compliance
with such l ocal requirements
must besati_nd
by
theinstaller orend user
ofthe water b eater with
a Ic_al;yprescribed
temperature-pressure
relief valve i nstalled
inthe
da_ignatedopening
inthe water h eater
See manual
heading-'_Temporamre-Pressu re
Relief Valves" for installation
and mainte-
nance o frelief valve, discharge
line, and other
safetyprecautions.
13
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