Temperature-Pressure Relief Valve - Maytag HN41240P User Manual

Instructions for Installation (cont'd)
Temperature-Pressure Relief Valve
I _WARNING AWARNING
At the time of manuf_er heater was provid- The temperature-pressure relief valve must be manu-
ed with a combination temperature-pressuresrelief valve ally operated at least once a year. Caution should be
certified by a nationally recognizedtesting 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 requirements for 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 requirementsof 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 productionof listed equipment 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 "_'_ _g_
not lessthan the water heater input rate as shown on the HOT
model rating plate. (Electric heaters - watts divided by I _¢=ll c°l-D
1000 x 3415 equal RTU/Hr.rate.)
Your local jurisdictional authority, while mandating the
use of a temperature-pressure relief valve complying with _ -_ jTEMPERATURE-
ANSI Z21.22 and ASME, may require a valve model differ- ",_, --_J_/ PRESSURE RELIEF
ent from the one furnished with the water heater.
_-
_,_'_J VALVE
Compliancewith suchlocal requirements must be satisfied
by the installer or end user of the water heater with a _ _\ [ / DISCHARGE PIPE
locally prescribed temperature-pressure relief valve _
_
(Donot capor plug)
installed in the designated opening in the water heater in _
S "
PROVIDE A 6"AIR
_ --
place of the factoryfurnishedvalve. __ GAPBE'IV4EEN T HE
END OF THE
For safe operation of the water heater, the relief valve DISCHARGE PIPE
must not be removed from it's designated opening or ANDDRAIN
plugged.
The temperature-pressure relief valve must be installed
directly into the fitting of the water heater designated for I
the relief valve. Positionthe valve downward and provide
tubing sothat any dischargewill 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 discharge opening must not be blocked or
reducedin size under any circumstances. E xcessive length,
over 30 feet, or use of more than four elbows can cause
restriction and reducethe dischargecapacityof the valve.
No valve or other obstruction isto be placed 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 "THIS WATER HEATER ISAPPROVED WITH ACOMBINATION TEMPERATURE-
PRESSURE RELIEF VALVE. FOR SAFEOPERATIONOF THE WATERHEATER,
valve must be allowed to discharge water in quantities
THE RELIEFVALVE(S) MUST NOT BE REMOVED FROM ITS DESIGNATED
should circumstances demand. If the discharge pipe is not POINT OFINSTALLATION ORPLUGGED."
connected to a drain or other suitable means, the water YOUR LOCAL JURISDICTIONAL AUTHORITY, WHILE MANDATING THE USE
flow may causeproperty damage.
OF A TEMPERATURE-PRESSURE RELIEFVALVE COMPLYING WITH ANSI
The
Discharge Pipe:
z21.22 AND ASME, MAY REQUIRE A VALVEMODEL DIFFERENT FROMTHE
Must not be smaller in size than the outlet pipe size of ONE FURNISHED WITH THE WATER HEATER,
the valve, or have any reducing couplings or other COMPLIANCE WITH SUCH LOCAL R EQUIREMENTS MUST BESATISFIED BY
restrictions.
THE INSTALLER OR END USEROF THE WATERHEATER WITH A LOCALLY
Must not be
plugged
or blocked. DESIGNATEDPRESCRIBED OPENINGTEMPERATURE-PRESSUREIN THEWATERHEATER.RELIEF VALVE INSTALLEDIN THE
Must be of material listed for hot water distribution. SEE MANUAL HEADING
-
"TEMPERATURE-PRESSURE RELIEF VALVES" FOR
Must be installed so as _o allow complete drainage of INSTALLATION ANDMAINTENANCE OFRELIEF VALVE, DISCHARGE LINE
both the temperature-pressurerelief valve, and the dis- AND OTHER SAFETY PRECAUT ONS.
charge pipe.
Must terminate at an adequate drain.
Must not have any valve between the relief valve and
tank.
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