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INSTALLATION
17
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.
For a single water heater installation, follow the diagrams on pages 22 and 23. For multiple water heater
installations, follow the instructions on pages 33 to 36.
INDOOR INSTALLATION
The water heater is to be installed at floor level and must stand vertically
upright on a stable fireproof base as acceptable to local authorities.
There are also special requirements in AS 5601 and AS/NZS 5601.1 for
water heaters installed in a garage, an enclosed space and other
locations. Remember all local authorities have regulations about putting
water heaters into roof spaces.
For indoor models the distances set out in the diagram should be
observed. Keep the water heater and flue at least 25 mm clear of walls,
cupboards, timber or any other combustibles and at least 500 mm clear
of curtains and furnishings.
Ventilation
A room or enclosure where the water heater is installed, including a plant
room or residential garage, must comply with the ventilation and air
supply requirements of AS 5601 or AS/NZS 5601.1, as applicable under
local regulations. Consideration must be given to other gas burning
appliances installed in the same space.
Secondary Flue
A secondary flue must be installed with an indoor water heater to
discharge combustion products outside the building. The flue design and
installation must comply with AS 5601 or AS/NZS 5601.1.
The water heater is supplied with a draught diverter, screwed to the top
of the water heater. The draught diverter is designed to receive a
125 mm diameter flue (621 265 models) and a 200 mm diameter
flue (621 275 models). An adaptor is also supplied with a 621 275 model.
The flue installed with a 621 275 model sits inside of the adaptor.
Remove the adaptor (621 275 models) from the packaging at the top of the water heater and insert into
the outlet spigot of the draught diverter cone.
The secondary flue must:
be seated inside of the outlet spigot (621 265 models) or the adaptor (621 275 models) of the draught
diverter.
be self-supporting and not impose a load on the water heater.
use a slip joint or similar to allow for disconnection.
be designed to run vertically for the maximum possible distance, and not less than 600 mm, before any
change of direction.
There are particular fluing requirements for a 631 275 model water heater installed with a room sealed
installation kit. Refer to the installation instructions supplied with the kit.
Clearance Requirements
Heavy Duty Gas Indoor Water Heaters
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