Rheem 265 litre Owner's Manual And Installation Instructions page 19

OUTDOOR INSTALLATION
The water heater is to be installed at ground level on a concrete or brick plinth or other fireproof base as
approved by the local authority. The water heater must also stand vertically upright with the back of the water
heater against or within 25 mm of an external wall or alternatively against a fireproof screen extending at
least 500 mm above, below and either side the flue terminal. Failure to observe this precaution can cause
problems in high wind areas. A secondary flue is not required.
The water heater must be located to ensure that the location of the flue terminal complies with the
requirements of AS 5601 or AS/NZS 5601.1, as applicable under local regulations. As a guide the following
requirements are extracted from the Gas Installations Standard. The distances are measured along the wall
behind the water heater.
At least 500 mm between the top of the flue terminal and the
eaves.
At least 500 mm (265) or 1500 mm (275) between the flue
terminal and the edge of any opening into the building, such
as an openable door or window, measured horizontally*.
At least 1000 mm (265) or 1500 mm (275) between the flue
terminal and the edge of any opening into the building, such
as an openable window, measured vertically.
At least 500 mm between the flue terminal and a return wall
or external corner, measured horizontally*.
At least 500 mm clear of any combustibles.
Note: * If these horizontal distances cannot be achieved, AS/NZS 5601.1 states an equivalent horizontal
distance measured diagonally from the nearest discharge point of the flue terminal to the opening may be
deemed to comply. Check with the local regulator.
SAFE TRAY
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. AS/NZS 3500.4
also has particular requirements when a safe tray must be installed.
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below, an approved pressure
limiting valve is required and should be fitted as shown in the installation diagram
diagram on page 26).
Model
Relief valve setting
Expansion control valve setting*
Max. mains supply pressure
With expansion control valve
Without expansion control valve
* Expansion control valve not supplied with water heater
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a pressure pump system is not installed,
then the bottom of the supply tank must be at least 1 m above the highest point of the hot water plumbing
system, including the water heater. Care must be taken to avoid air locks. The cold water line to the water
heater should be adequately sized and fitted with a full flow gate valve or ball valve.
265, 275
1000kPa
850kPa
680kPa
800kPa
19
INSTALLATION
(refer to installation