Specifications

WATER QUALITY
Your Dux water heater has been manufactured to suit common water
conditions present in most Australian metropolitan supplies. Please note that
harsh water supplies can have a detrimental effect on the water heater and its
life expectancy. If you are unsure about your water quality you can obtain
information from your local water supply authority.
Water can also contain material known to create lime scale where lime scale
can build up and block safety fittings. One measure of this water quality is
known as the saturation index, if the saturation index is greater than 0.40 and
therefore subject to lime scale an expansion control valve should be fitted to
the unit.
CAUTION: If the water heater is left in an operating condition and
unused for two weeks or more, a quantity of hydrogen (which is highly
flammable) may accumulate in the top of the water cylinder. To
dissipate this gas safely it is recommended that a hot tap be turned on
for several minutes at a sink, basin or bath, but not a dishwasher,
clothes washer or other appliance. During this procedure there must
be no smoking, no open flame or any other electrical appliance
operating nearby. If hydrogen is discharged through the tap it will
probably make an unusual sound similar to that of air escaping.
Part No: H3023 9 of 22
Version: 10155A