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Relief Valve; To Fill The Water Heater - GE Powervent AP13787 Use And Care Manual

Gas residential 40 and 50 gallon
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Installing the water heater.
A new combination temperature and pressure relief valve, complying with the Standard for
Relief Valves and Automatic Gas Shut-Off Devices for Hot Water Supply Systems, ANSI
Z21.22, is supplied and must remain in the opening provided and marked for the purpose on
the water heater. No valve of any type should be installed between the relief valve and the
tank. Local codes shall govern the installation of relief valves.
WARNING: The tank
must be full of water before
heater is turned on. The
water heater warranty does
not cover damage or failure
resulting from operation
with an empty or partially
empty tank.

Relief Valve

The pressure rating of the relief valve
must not exceed 150 PSI, the maximum
working pressure of the water heater as
marked on the rating plate.
The Btuh rating of the relief valve must
equal or exceed the Btuh input of the
water heater as marked on its rating plate.
Position the outlet of the relief valve above
a suitable open drain to eliminate
potential water damage. Piping used
should be of a type approved for hot
water distribution.

To Fill the Water Heater

Make certain that the drain valve is
closed, then open the shut-off valve in the
cold water supply line.
Open each hot water faucet slowly to
allow the air to vent from the water
heater and piping.
A steady flow of water from the hot water
faucet(s) indicates a full water heater.
Condensation can form on the tank
when it is first filled with water.
Condensation might also occur with a
heavy water draw and very cold inlet
water temperatures.
Drops of water falling on the burner can
produce a sizzling or pinging sound.
This condition is not unusual, and will
disappear after the water becomes
heated. If, however, the condensation
continues, examine the piping and fittings
for possible leaks.
The discharge line must be no smaller
than the outlet of the valve and must
pitch downward from the valve to allow
complete drainage (by gravity) of the relief
valve and discharge line.
The end of the discharge line should not
be threaded or concealed and should be
protected from freezing. No valve of any
type, restriction, or reducer coupling
should be installed in the discharge line.
Additional information on this subject
may be found at,
under "Library", scroll down to the
Technical Service Bulletins 1400 Series
Section and choose Bulletin #1402.

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