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10
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/CSA 4.6, 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.
Relief Valve
The pressure rating of the relief valve
must not exceed 150 psi (1,034 kPa), 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.
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.
To Fill the Water Heater
WARNING: The tank
must be full of water before
the water heater is turned
on. The water heater
warranty does not cover
damage or failure resulting
from operation with an
empty or partially empty
tank.
Condensation
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.
Additional information on this subject
may be found at www.rheem.com, under
“Library”, scroll down to the Technical
Service Bulletins 1400 Series Section and
choose Bulletin #1402.
This water heater has a factory installed
flue damper device for increased energy
efficiency. Removal of the flue damper
connections will render the heater
inoperable. Do not operate the water
heater without the damper housing in
place on the damper assembly. A draft
hood is shipped with this water heater.
The draft hood must be installed on the
damper housing using the holes provided
for alignment and fastening. The damper
must be in open position as shown in the
figure when water heater main burner
is operating. See trouble shooting
instructions if a condition other than this
occurs.
Flue Damper
Follow these instructions for proper installation and operation
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 all hot water
faucet(s) indicates a full water heater.
Do not allow the flammable vapor sensor
to become submerged in water.
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