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INSTALLATION – WATER HEATER
46
WATER HEATER LOCATION
The water heater should be installed close to the most frequently used outlet and its position chosen with
safety and service in mind. If this water heater is part of a solar water heater system, it should also be
installed close to the solar storage tank. Make sure people (particularly children) will not touch the flue
terminal. The flue terminal and air inlet must be clear of obstructions and shrubbery.
Clearance must be allowed for servicing of the water heater. The water heater must be accessible without
the use of a ladder or scaffold. Make sure the entire front panel can be removed for service. You must be
able to read the information on the rating plate. Remember you may have to take the entire water heater out
later for servicing.
This water heater must be installed vertically upright with the water, gas and power connections on the
underside, pointing toward the ground. The back of the water heater can be either against a wall or
supported by a frame.
Note: The water heater must be well secured to the wall or
frame using two fasteners each at the top and bottom of the
unit (refer to page 54 for mounting hole positions and weight
of the water heater). Use the screws provided only if they are
suitable for the wall or frame type. Otherwise select and use
alternative fasteners suitable for the application. The
fasteners must be capable of bearing the full weight of the
water heater so it may not work loose nor impose any load on
the gas and water pipe work connected to the water heater.
Refer to the fastener manufacturer’s information and
recommendations for the type of fastener to use for the wall
or frame type and load bearing requirements.
Alternatively the water heater can be recessed into a wall
(refer to “Recess Installation” on page 48).
The water heater must not be installed in an area with a corrosive atmosphere where chemicals are stored or
where aerosol propellants are released. Remember the air may be safe to breathe, but when it goes through
a flame, chemical changes take place which may attack the water heater.
A secondary flue is not required. The water heater must not be installed indoors or in a confined space.
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 300 mm between the top of the flue terminal
and the eaves.
At least 300 mm between the flue terminal and the
edge of any opening into the building, such as an
openable door or window, measured horizontally*.
At least 1500 mm between the top of the flue terminal
and the edge of any opening into the building, such as
an openable window, measured vertically.
At least 300 mm between the flue terminal and a return
wall or external corner, measured horizontally*.
At least 1500 mm between the flue terminal and any
opening into a building, in the direction of the flue
discharge.
At least 500 mm between the flue terminal and a fence, wall or other obstruction, in the direction of the
flue discharge.
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.
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