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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 maintains
periodic inspection of production of listed equipment or mate-
rials, as meeting the requirements for Relief Valves and
Automatic Gas Shutoff Devices for 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 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 Devices for
Hot Water SupplySystems, ANSI Z21.22 by a nationally recog-
nized testing laboratory that maintains periodic inspection of
production of listed equipment or materials.
The valve must be marked with a maximum set pressurenot
to exceed the marked hydrostatic working pressure of the
water heater (150 Ibs.lsq.in.) and a dischargecapacity not less
than the water heater input rate asshown 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.
scribedtemperature-pressure relief valve installedin the desig-
nated opening in the water heater in place of the factory fur-
nishedvalve.
For safeoperation of the 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 provide tubing sothat 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 andreduce the dischargecapacityof the valve.
No valveor other obstruction isto be placed between the relief
valve and the tank. Do not connect tubing directly to discharge
drain unlessa6" air gap isprovided.Toprevent bodilyinjury,haz-
ard to life, or property damage, the relief valve must be allowed
to dischargewater in quantitiesshouldcircumstancesdemand. 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 any reducing couplingsor other restrictions.
Must not be pluggedor blocked.
Must be of material listed for hot water distribution.
Hust be installed so as to allow complete drainage of both
the temperature-pressure relief valve, and the discharge
pipe.
Hust terminate at an adequate drain.
Must not have anyvalve between the relief valve and tank.
&WARNING
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 falls to completely
reset and continues to release water, immediately close the
cold water inlet to the water heater, follow the draining
instructions, and replace the temperature-pressure relief
valve with a now one.
HOT COLD
VALVE
RELIEF VALVE
PIPE
(Do not cap or plug)
6" AIR GAP
FLOOR DRAIN
RELIEF VALVEOPENING
"THIS WATER HEATER IS PROVIDED WITH A COMBINATION TEMPER-
ATURE-PRESSURE RELIEF VALVE. FOR SAFE OPERATION OF THE
WATER HEATER, THE RELIEF VALVE(S) MUST NOT BE REMOVED
FROM ITS DESIGNATED POINT OF INSTALLATIONORPLUGGED."
YOUR LOCAL JURISDICTIONAL AUTHORITY, WHILE MANDATING THE
USE OF A TEMPERATURE-PRESSURE RELIEF VALVE COMPLYING
WITH ANSI Z21.22 AND ASME, MAY REQUIRE A VALVE MODEL DIF-
FERENT FROM THE ONE FURNISHED WITHTHE WATER HEATER.
COMPLIANCE WITH SUCH LOCAL REQUIREMENTS MUST BE SATIS-
FIED BY THE INSTALLER OR END USER OF THE WATER HEATER
WITH A LOCALLY PRESCRIBED TEMPERATURE-PRESSURE RELIEF
VALVE INSTALLED IN THE DESIGNATED OPENING IN THE WATER
HEATER
SEE MANUAL HEADING--'TEMPERATURE-PRESSURE RELIEF
VALVES"FOR INSTALLATIONAND MAINTENANCE OF REUEF VALVE,
DISCHARGE LINE AND OTHER SAFETY PRECAUTIONS.
12
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