How Your Water Heater Works - Rheem 300 series Installation Instructions Manual

HOW YOUR WATER HEATER WORKS

Water is stored in a vitreous enamel lined steel cylinder and heated by a gas
burner located under the cylinder. The heat produced by the burner is
transferred to the water through the base of the cylinder and through the wall of
a flue pipe which passes through the centre of the cylinder. A flue baffle in this
flue ensures the efficiency of the water heater is correct. The gas supply to the
burner is controlled by the thermostat so the water is heated to a constant
temperature. Automatic safety controls are fitted to the water heater to provide
safe and efficient operation.
MAINS PRESSURE
The water heater is designed to operate at
mains pressure by connecting directly to
the mains water supply. If the mains supply
pressure in your area exceeds that shown
on page 14, a pressure limiting valve must
be fitted. The supply pressure should be
greater than 350 kPa for true mains
pressure operation to be achieved.
PIEZO IGNITION
The "Piezo" push button igniter makes
lighting the pilot flame of your water heater
very easy. Simply follow the instructions on
the label attached to the front of the water
heater. There is no need for matches to
light the water heater.
PILOT IGNITER
A permanent pilot flame burns to ignite the
main burner automatically. Heat from the
pilot is absorbed by the water.
GOING ON HOLIDAYS
If you are going on holiday for more than a
few days the thermostat can be set to the
" " (pilot) position to conserve energy
(refer to point 1 of "Close Down Procedure"
on page 27). If it is necessary to turn off the
water heater, refer to "To Turn Off The
Water Heater" on page 5.
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