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Instructions for Installation (cont'd)
Temperature-Pressure
Relief Valve
WARNING
A WARNING
At the time of manufacture this water heater was provid-
The temperature-pressure relief valve must be manu-
ed with a combination tempereture-pressures relief valve
ally operated at least once a year. Caution should be
certified by a nationally recognized testing laboratory that
taken to ensure that (1) no one is in front of or
maintains periodic inspection of production of listed
around the outlet of the temperature-pressure
relief
equipment or materials, as meeting the requirementsfor
valve discharge line, and (2) the water manually dis-
Relief Valves and Automatic Gas Shutoff Devices for 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 corn-
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
ately 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 maintains periodic inspection
of production of listedequipment or materials.
The valve must be marked with a maximum set pressure
not to exceedthe marked hydrostaticworking pressureof
the water heater (150 Ibs./sq. in.) and a dischargecapacity
COLD
not lessthan the water heater input rate as shown on the
model rating plate. (Electric heaters - watts divided by
1000 x 3415 ec_ual B TU/Hr.rate.)
Your local jurisdictional authority, while mandating the!
use of a temperature-pressurerelief valve complying with
ANSI Z21.22 and ASME, may require a valve model differ-
ent from the one furnished with the water heater.
Compliancewith such local requirementsmust be satisfied
by the installer or end user of the water heater with a
TEMPERATURE-
Iocallyprescribed
temperature-pressure
relief valve
PRESSUREvALvERELIEF
installed in the designated opening in the water heater in
place of the factory furnishedvalve.
I
For safe operation of the water heater, the relief valve
must not be removed from it's designated opening or
TEMPERED
plugged.
WATER
The temperature-pressure relief valve must be installed
directly into the fitting of the water heater designatedfor
OUTLET
I the relief valve. Positionthe valve downward and provide
(Do not capor plug)
PROVIDE A 6" AIR
tubing so that any dischargewill exit only within 6 inches
GAPBEI_NEEN T HE
above, or at any distance below the structural floor. Be I
ENDOFTHE
certain that no contact is made with any live electrical
DISCHARGE PIPE
part. The discharge opening must not be blocked or
AND DRAIN
reducedin size under any circumstances. E xcessive length,
over 30 feet, or use of more than four elbows can cause
restriction and reducethe dischargecapacity of the valve.
No valve or other obstruction is to be pieced between the
relief valve and the tank. Do not connecttubing directly to
RELIEF
VALVE
OPENING
dischargedrain unlessa 6" air gap is provided. To prevent
bodily injury, hazard to life, or property damage, the relief '
'THISWATER H EATER I SPROVIDED WITH A COMBINATION
TEMPERA-
valve must be allowed to discharge water in quantities
TURE-PRESSURE
RELIEF V ALVE. FOR SAFE OPERATION
OFTHE WATER
should circumstances demand. If the dischargepipe is not
HEATER,
THE RELIEF V ALVE(S) MUST NOT BEREMOVED
FROM ITSDES-
connected to a drain or other suitable means, the water
IGNATED
PDINTOF I NSTALLATION
ORPLUGGED."
flow may causeproperty damage.
YOUR LOCAL JURISDICTIONAL
AUTHORITy,
WH_LE M ANDATING
THE USE
The DischargePipe:
OFA TEMPERATURE-PRESSURE
RELIEF V ALVE COMPLYING
WITH ANSI
Must notbe smaller in size than the outlet pipe size of
z21.22 AND ASME, MAY REQUIRE A VALVE M ODEL DIFFERENT FROM
the valve, or have any reducing couplings or other
THE ONE FURNISHED
WITH THE WATER H EATER.
restrictions.
COMPLIANCE
WITH SUCH LOCAL R EQUIREMENTS
MUST BESATISFIED
Must not be plugged or blocked.
BYTHE INSTALLER
OREND USER OFTHE WATER H EATER WITH LOCAL-
Must be of material listedfor hot water distribution.
LYPRESCRIBED
TEMPERATURE-PRESSURE
RELIEF VALVE INSTALLED
IN
Must be installed so as to allow complete drainage of
THE DESIGNATED
OPENING I NTHE WATER HEATER.
both the temperature-pressurerelief valve, and the dis-
SEEMANUAL HEADING--"TEMPERATURE-PRESSURE
RELIEF V ALVES'
charge pipe.
FORINSTALLATION
AND MAINTENANCE
OFRELIEF V ALVE. DISCHARGE
Must terminate at an adequate drain.
LINE AND OTHER SAFETY PRECAUTIONS.
Must not have any valve between the relief valve and
tank,
14
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