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Installation instructions
CAUTION
To reduce the risk of excessive pressures
and temperatures in this water heater,
install temperature and pressure protective
equipment required by local codes and no
less than a combination temperature and
pressure relief valve certified by a nationally
recognized testing laboratory that
maintains periodic inspection of production
of listed equipment or materials, as meeting
the requirements for Relief Valves and
Automatic Gas Shutoff Devices for Hot
Water Supply Systems, ANSI Z21.22. This
valve must be marked with a maximum set
pressure not to exceed the marked
maximum working pressure of the water
heater. Install the valve into an opening
provided and marked for this purpose in the
water heater, and orient it or provide tubing
so that any discharge from the valve exits
only within 6 inches above, or at any
distance below, the structural floor, and
does not contact any live electrical part. The
discharge opening must not be blocked or
reduced in size under any circumstances.
NOTICE
Wrap the Teflon tape around the threaded
opening of the pressure relief valve at least
15 times (approximately 47.2" (120 cm) in
length) in order to prevent water leakage.
Wrap at least
15 times
NOTICE
Wrap at least 8 turns (approximately 25.2
inches (65 cm)) of Teflon tape around the
threaded opening of the hose connector.
Flow guide tube
10
Teflon tape
Hose connector
National Plumbing codes may require a drain pan for
the water heater installation. Failure to install one is
the sole responsibility of owner and/or installer.
Reference UPC (Uniform Plumbing Code), or IPC
(International Plumbing Code).
3.3 Closed system thermal expansion
Periodic discharge of the temperature and pressure
relief valve or failure of the element gasket may be
due to thermal expansion in a closed water supply
system. The water utility supply meter may contain a
check valve, backflow preventer or water pressure
reducing valve which will create a closed water
system.
During the heating cycle of the water heater, the
water expands causing pressure inside the water
heater to increase.
The temperature and pressure relief valve may
discharge hot water under these conditions which
results in a loss of energy and a build-up of lime on the
relief valve seat.
The temperature and pressure relief valve may
discharge hot water under these conditions which
results in a loss of energy and a build-up of lime on the
relief valve seat.
To prevent this from happening, there are two
recommendations:
Install a diaphragm-type expansion tank that is
l
suitable for potable water on the cold water supply
line. A minimum 0.5 gallon expansion tank should
be used.
Contact the local water supplier or plumbing
inspector for information on how to control this
situation. Do not plug the temperature and pressure
relief valve.
3.4 Electrical Connection
WARNING
Working on an energized circuit can result
in severe injury or death from electrical
shock.
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