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WATER SUPPLIES
Your water heater is manufactured to suit the water conditions of most Australian metropolitan supplies.
However, there are some known water supplies which can have detrimental effects on the water heater
and its operation and/or life expectancy. If you are unsure of your water quality, you can obtain
information from your local water supply authority. The water heater should only be connected to a
potable water supply.
ANODE
By using the correct colour coded anode this water heater can be used in areas where the total
dissolved solids (TDS) content in the water is up to 2500 mg/L. In areas where the TDS exceeds
600 mg/L it is possible the black anode, which is the standard anode fitted to the water heater, may be
excessively active. To alleviate this, the black anode should be replaced with one colour coded blue.
Where the TDS of the water is less than 40 mg/L, such as when the water has been deionised or is
from an alpine supply, a high potential anode, colour coded green, should be used. The changing of
anodes must be carried out by a plumber or authorised service person.
CAUTION
If your water supply has a TDS greater than 600 mg/L and the anode has not been changed to a blue
one, there is the possibility hydrogen gas could accumulate in the top of the water heater during long
periods of no use. In areas where this is likely to occur, the installer should instruct the householder on
how to dissipate the gas safely.
If, under these conditions, the water heater has not been used for two or more weeks the following
procedure should be carried out before using any electrical appliances (automatic washing machines
and dishwashers) which are connected to the hot water supply.
The hydrogen, which is highly flammable, should be vented safely by opening a hot tap and allowing
the water to flow. There should be no smoking or naked flame near the tap whilst it is turned on. Any
hydrogen gas will be dissipated. This is indicated by an unusual spurting of the water from the tap.
Once the water runs freely again, any hydrogen in the system will have been released.
SATURATION INDEX
The saturation index is used as a measure of the water’s corrosive or scaling properties. In a corrosive
water supply, the water can attack copper parts and cause them to fail. Where the saturation index is
less than –1.0, the water is corrosive and a corrosion resistant heating unit should be used and
warranty does not apply to a solar collector.
In a scaling water supply calcium carbonate is deposited out of the water onto any hot metallic surface.
Where the saturation index exceeds +0.40, the water is scaling and an expansion control valve* must
be fitted on the cold water line after the non-return valve and the solar collectors should be covered
when the water heater is not intended to be used for more than two weeks. Where the saturation index
exceeds +0.80, a low watts density heating unit should be used and warranty does not apply to a solar
collector unless a water softening device is installed.
Contact your nearest Solahart Dealer if a replacement heating unit is required.
Refer to the
cold water connection detail on page 28.
WATER HEATERS NOT INSTALLED IN ACCORDANCE WITH THE ABOVE ADVICE WILL NOT BE
COVERED BY THE WARRANTY.