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IJnstallation Instructions (cont'd)
Temperature=Pressure
Relief Valve
_kWARNIfNG
At the time of manufacture this water heater was provided
with a combination temperature-pressures relief valve cer-
tified by a nationally recognized testing laboratory that
maintains periodic inspection of production of listed equip-
ment or materials, as meeting the requirements for Relief
Valves and Automatic Gas Shutoff Devices for Not Water
Supply Systems, and the current edition of ANSI Z21,22
and the code requirements of ASHE+ If replaced, the valve
must meet the requirements of local codes, but not less
than a combination temperature and pressure relief valve
certified as meeting the requirements for Relief Valves and
Automatic Gas Shutoff Devices for Hot Water Supply
Systems, ANSI Z21.22 by a nationally recognized testing
laboratory that maintains periodic inspection of production
of listed equipment or materials.
The valve must be marked with a maximum set pressure
not to exceed the marked hydrostatic working pressure of
the water heater (150 Ibs. p.sJ.) and a discharge capacity
not less than the water heater input rate as shown on the
model rating plate. (Electric heaters - watts divided by
1000 x 3412 equal BTU/Hro rate.)
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 differ-
ent from the one furnished with the water heater.
Compliance with such local requirements must 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
place of the factory furnished valve.
For safe operation of the water heater, the relief valve
must not be removed from it's designated opening or
plugged.
The temperature-pressure relief valve must be installed
directly into the fitting of the water heater designated for
the relief valve. Position the valve downward and provide
tubing so that any discharge will exit only within 6 inches
above, or at any distance below the structural floor. Be cer-
ta!nth_t .nocontactismade with any th,e e!ectrical p_rt+
The dischargeopening must not be blockedor reduced in
sizeunder any circumstances.Excessivelength,over 30
feet, or use of more than four elbows can cause restriction
and reduce the discharge capacity of the valve°
No valve or other obstruction is to be placed between the
relief valve and the tank. D,o not connect tubing directly to
discharge drain unless a 6 air gap is provided. To prevent
bodily injury, hazard to life, or property damage, the relief
valve must be allowed to discharge water in quantities
should circumstances demand. If the discharge pipe is not
connected to a drain or other suitable means, the water
flow may cause property damage.
The Discharge Pipe:
, Must not be smaller in size than the outlet pipe size of
the valve, or have any reducing couplings or other
restriction+
• Must not be plugged or blocked+
• Must be of material listed for hot water distribution.
• Must be installed so as to allow complete drainage of
both the temperature-pressure relief valve, and the dis.
charge pipe.
• Must terminate at an adequate drain.
• Must not have any valve between the relief valve and
tank,
_kWARNING
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 wilt not cause any
bodily injury or property damage because the water may
be extremely ho_
If after manually operating the valve, it fails to completely
reset and continues to release water, immediately, close
the cold water inlet to the water heater, follow the drain-
ing instructions, and replace the temperature-pressure
relief valve with a new one.
HOT
HOT
COLD
PRESSURE
RELIEF VALVE
(Do not cap or plug)
T&P REUEF
VALVE FROEE 'TEMPERATURE.
PRESSURE
REUEF VALVE