Temperature-Pressure Relief Valve - Maytag HN41240X User Manual

Instructions for Installation (cont'd)
Temperature-Pressure Relief Valve
AWARNING &WARNING
At the time of manufacture this water 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 Devicesfor 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 com-
the valve must meet the requirements of local codes,but pletety 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 periodicinspection
of production of listed equipment or materials.
The valve must be marked with a maximum set pressure
not to exceedthe marked hydrostaticworking pressureof SHUTOFF
the water heater (150 Ibs./sq. in.) and a dischargecapacity
_ _r_VALVE
not less than the water heater input rate as shown on the , i<_ =__
model rating plate. (Electric heaters - watts divided by '_ _ '_
1000 x 3415 equal BTU/Hr.rate.) HOT COLD
Your local jurisdictional authority, while mandating the
use of a temperature-pressurerelief valve complyingwith
ANSI Z21.22 and ASME, may require a valve model differ-
ent from the one furnished with the water heater.
Compliancewith suchlocal requirementsmust be satisfied
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 in _ _ TEMPERATURE-
place of the factory furnished valve. \ PRESSURE
For safe operation of the water heater, the relief valve RELIEF V ALVE
must not be removed from it's designated opening or
plugged. = DISCHARGE PIPE
The temperature-pressure relief valve must be installed (Do not cap
or plug)
directly into the fitting of the water heater designatedfor
the relief valve. Positionthe valve downward and provide
tubing so that 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
reduced in size under any circumstances. E xcessive length,
over 30 feet, or use of more than four elbows can cause
restrictionand reducethe dischargecapacity of the valve.
No valve or other obstruction isto be placed between the _
_
_/ _6 _ AIRGAP
relief valve and the tank. Do not connecttubing directly to _ ' 'm
dischargedrain unlessa 6" air gap is provided. To prevent -- O FLOOR DRAIN
bodily injury, hazard to life, or property damage, the relief
valve must be allowed to discharge water in quantities
should circumstances demand. If the dischargepipe is not RELIEF VALVE OPENING
connected to a drain or other suitable means, the water Atthetime of manufacture, this water heater
was provided
withacombination
flow may causeproperty damage, temperature-pressure relief valve l isted a s complying with thestandard forrelief
The DischargePipe: valves a ndautomatic gasshut-off devices for hotwater s upply systems, ANSI
• Must not he smaller in size than the outlet pipe size of z21.22. For safe operation o f thewater heater, therelief v alve must not be
removed from its designated point o finstallation orplugged.
the valve, or have any reducing couplings or other Your l ocal u risdictional
authority, while mandating
theuse of
a temperature-
restrictions, pressure relief valve complying with ANSI Z21.22 and ASME, may require avalve
model different from theone furnished with thewater h eater.
• Must not be plugged or blocked. Compliance with such local requirements must b esatisfied bytheinstaller or
• Must be of material listed for hot water distribution, enduser of thewater heater witha locally p rescribed temperature-pressure
• Must be installed so as to allow complete drainage of relief valve i nstalled inthe
designated opening
inthewater h eater.
both the temperature-pressurerelief valve, and the dis- See manual heading -"Temperature-Pressure Relief Valves" forinstallation and
chargepipe. maintenance of relief valve, discharge line, a nd ether s afety p recautions, i
• Must terminate at an adequate drain.
• Must not have any valve between the relief valve and
tank.
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