Technical data

32
WATER SUPPLIES
This water heater must be installed in accordance with this advice to be
covered by the manufacturer’s warranty.
This water heater is manufactured to suit the water conditions of most public
reticulated water supplies. However, there are some known water chemistries
which can have detrimental effects on the water heater and its operation
and / or life expectancy. If you are unsure of your water chemistry, you may be
able to obtain information from your local water supply authority. This water
heater should only be connected to a water supply which complies with these
guidelines for the manufacturer‟s warranty to apply.
CHANGE OF WATER SUPPLY
The changing or alternating from one water supply to another can have a
detrimental effect on the operation and / or life expectation of a number of
components in this water heater.
Where there is a changeover from one water supply to another, e.g. a rainwater
tank supply, bore water supply, desalinated water supply, public reticulated
water supply or water brought in from another supply, then water chemistry
information should be sought from the supplier or it should be tested to ensure
the water supply meets the requirements given in these guidelines for the
manufacturer‟s warranty to apply.
SATURATION INDEX
The saturation index (SI) is used as a measure of the water‟s corrosive or
scaling properties.
Where the saturation index is less than –1.0, the water is very corrosive and
the manufacturer‟s warranty does not apply to the water heater. In a corrosive
water supply, the water can attack copper parts and cause them to fail.
Where the saturation index exceeds +0.40, the water is very scaling and the
manufacturer‟s warranty does not apply to the water heater.
Water which is scaling may be treated with a water softening device to reduce
the saturation index of the water.