Technical data

INSTALLATION
18
OUTDOOR INSTALLATION
The water heater is to be installed at ground or floor level on a stable fireproof base as acceptable to local
authorities. 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 (natural gas models) or 300 mm (Propane,
Butane, Town / TLP models) between the top of the flue
terminal and the eaves.
At least 500 mm between the flue terminal and the edge of
any opening into the building, such as an openable door or
window, measured horizontally* and 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 (refer to diagram on
page 25).
Model
260
Relief valve setting
1000 kPa
Expansion control valve setting *
850 kPa
Max. mains supply pressure
With expansion control valve
680 kPa
Without expansion control valve
800 kPa
* Expansion control valve not supplied with the 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.