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Solahart Owner’s Manual – Thermosiphon Systems - Revision 3
supply from various water sources), the anode must be inspected (and replaced if there is any sign of depletion) within 5
years of its installation. For known very aggressive water supplies, the anode should be inspected within 3 years of its
installation. Refer to your local Solahart Dealer.
For all water supplies, if the anode is not replaced during a major service (refer to
“Major Service Every Five Years”
on
Page
7
) then the maximum time after installation when the anode should be replaced for this water heater is 8 years.
Caution – Total Dissolved Solid (TDS)
If the water supply has a TDS greater than 600 mg/L there is the possibility the anode may become overactive and hydrogen
gas, which is highly flammable, could accumulate in the top of the water heater during long periods of no use.
Under these conditions, the hydrogen must be vented safely by opening a hot tap and allowing the water to flow. Do not use
any electrical appliances (automatic washing machines and dishwashers) for venting hydrogen gas. There should be no
smoking or naked flame near the tap whilst it is turned on. Release of hydrogen gas is indicated by an unusual spurting of
the water from the tap. Once the water runs freely, 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 including the heating unit and the collector.
Where the saturation index is less than –1.0, the water is very corrosive. If the saturation index is less than –1.0 the Solahart
warranty does not apply.
In a scaling water supply calcium carbonate
is deposited out of the water onto any hot
metallic surface. Where the saturation index
e0.40, the water is very scaling. If
the saturation index exceeds +0.40, an
expansion control valve must be fitted on the
cold water line after the non-return valve to
protect and for the Solahart warranty to
apply to the temperature pressure relief
valve and water heater cylinder.
Where the saturation index exceeds +0.80,
the Solahart warranty does not apply to a
standard watts density heating unit or a solar
collector. A low watts density eating unit
must be used for the Solahart warranty to
apply to the heating unit.
Solar collectors should be covered when the water heater is not intended to be used for more than two weeks to reduce the
chance of scaling. Water which is scaling may be treated with a water softening device to reduce the saturation index of the
water. Contact your local Solahart Dealer if a replacement heating unit is required.
Collector Glass Breakage
The Solahart warranty
DOES NOT
cover breakage of solar collector glass. It is recommended that the household insurance
policy cover the collector glass and/or damage to the water heater, especially in cyclonic areas and in locations where severe
hail is likely to occur. The collector glass is not offered as a replacement part. Should the solar collector require replacement,
contact your local Solahart Dealer.
Warning: No attempt should be made to remove or replace broken collector glass.
Frost / Freeze Protection
This system does not have freeze protection and is not suitable for installation in areas prone to freeze conditions. Freeze
conditions occur below 5°C (41°F). This system has NO WARRANTY for freeze damage. In areas that are prone to frost /
freezing, a Closed Circuit system should be used and consult your Solahart Dealer for more advice.
