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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 combination temperature-pressures relief valve certified
by a nationally recognized testing laboratory that maintain
)eriodic inspection of production of listed equipment or mate-
rials, as meeting the requirements for Relief Valves and
Automatic Gas Shutoff Devicesfor Hot Water Supply Systems,
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 local codes, but not lessthan a combination tempera-
ture and pressure relief valve certified as meeting the require-
ments for Relief Valvesand Automatic Gas Shutoff Devicesfor
Hot Water SupplySystems, ANSI Z21.22 by a nationally recog-
nized testing laboratory that maintains periodic inspection of
production of listedequipment or materials.
The valve must be marked with a maximum set pressure not
to exceed the marked hydrostatic working pressure of thq
water heater (150 Ibs./sq.in.) and a dischargecapacity not less
than the water heater input rate as shown on the model rating
plate. (Electric heaters - watts divided by 1000 x 3415 equal
BTU/Hr. rate.)
Your localjurisdictional authority, while mandating the useof a
temperature-pressure relief valve complying with ANSI Z21.22
and ASME, may require a valve model different from the one
furnishedwith the water heater.
Compliance with such local requirements must be satisfied by
the installer or end user of the water heater with a locally pre-
scribed temperature-pressure relief valve installed inthe desig-
nated opening in the water heater in place of the factory fur-
nishedvalve.
For safe operation ofthe water heater, the relief valve must not
be removed from it's designatedopening or plugged.
The temperature-pressure relief valve must be installeddirectly
into the fitting of the water heater designatedfor the relief valve.
Positionthe valve downward and providetubing so that any dis-
charge will 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 part. The dischargeopening 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 dischargecapacityof the valve.
No valve or other obstruction isto be placed between the relief
valve and the tank. Do not connect tubing directly to discharge
drain unlessa 6" air gapisprovided.To prevent bodilyinjury, haz-
ard to life,or property damage,the relief valve mustbe allowed
to dischargewater in quantities shouldcircumstancesdemand. If
the dischargepipe is not connected to a drain or other suitable
means,the water flow may causeproperty damage.
The Discharge Pipe:
Must not be smaller in size than the outlet pipe size of the
valve, or have anyreducing couplingsor other restrictions.
Must not be plugged or blocked.
Must be of material listedfor hot water distribution.
Must be installed so as to allow complete drainage of both
the temperature-pressure relief valve, and the discharge
pipe.
Must terminate at an adequate drain.
Must not haveany valve between the relief valveand tank.
AWARNING
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 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 closethe
cold water inlet to the water heater, follow the draining
instructions, and replace the temperature-pressure relief
valve with a new one.
HOT
SHUT OFF
VALVE
COLD
PRESSURE
RELIEF VALVE
PIPE (Do not cap
or plug)
)_
GAP
FLOOR DRAIN
RELIEFVALVEOPENING
At the time of manufacture, this water heater was provided with a combinationtem-
perature-pressure relief valve listed as complying with the standard for relief valves
and automatic gas shut-off devicesfor hot water supply systems,ANSI Z21.22. For
safeoperation of the water heatec the relief valve must not be removed from itsdes-
ignatedpoint of installation or plugged.
Your local iurisdictional authority, while mandating the use of a temperature-pressure
relief valve complying with ANSI Z21.22 and ASME,may require a valve model differ-
ent from the one furnished with the water heater
Compliance with such local requirementsmust besatisfied by the installer or end user
of the water heater with a locally prescribed temperature-pressure relief valve
installed in the designated opening inthe water heate_
Seemanualheading-"Temperature-PressureRelief Valves"for installationand mainte-
nance of relief valve,discharge line, andother safetyprecauuons
]2