Rheem 347 Series Owner's Manual And Installation Instructions page 7

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
supply pressure should be greater than 350 kPa for true mains pressure
operation to be achieved.
PRECAUTIONS
Where damage to property can occur in the event of the water heater leaking,
the water heater must be installed in a safe tray. Construction, installation and
draining of a safe tray must comply with AS/NZS 3500.4 and all local codes
and regulatory authority requirements.
The water heater must be maintained in accordance with the Owner's Guide
and Installation Instructions. Refer to
"Anode Inspection and Replacement"
and to
If this water heater is to be used where an uninterrupted hot water supply is
necessary for your application or business you should ensure that you have
back-up redundancy within the hot water system design. This should ensure
the continuity of hot water supply in the event that this water heater were to
become inoperable for any reason. We recommend you seek advice from your
plumber or specifier about your needs and building back-up redundancy into
your hot water supply system.
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater:

Shut down the gas control (refer to

Close the gas isolation valve at the inlet to the gas control.

Close the cold water isolation valve at the inlet to the water heater.
TO TURN ON THE WATER HEATER

Open the cold water isolation valve fully at the inlet to the water heater.

Open the gas isolation valve fully at the inlet to the gas control.

Light the water heater (refer to
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
Procedure"
on page 36). If it is necessary to turn off the water heater, refer to
"To Turn Off The Water Heater"
22, a pressure limiting valve must be fitted. The
"Maintenance Requirements"
on page 14.
"Close Down Procedure"
"Lighting the Water Heater"
on page 7.
7
ABOUT YOUR WATER HEATER
on page 36).
on page 34).
"Close Down
on page 9