Owner’s Manual – Solar Water Heaters
6
H3165 029664 Rev. B
Water Supply
General:
The water heater has been manufactured to
suit the water conditions of most Australian
and New Zealand metropolitan supplies.
Certain water supplies, especially those
sourced either fully or partly from bores or
artesian wells, can have a detrimental effect
on the water heater and its life expectancy.
If you are unsure about the chemistry of the
water supply, you can obtain information from
the local water supply authority.
Water Heater Storage Tank:
The water heater storage tank is designed for
use in areas where the Total Dissolved Solids
(TDS) content of the water supply is less
than 2500 mg/L. The Extended Tank Failure
Warranty does not apply in areas where the
TDS exceeds 2500 mg/L.
In areas where the TDS exceeds 600 mg/L,
it is possible the magnesium alloy anode
(supplied in all models of solar water heater)
may become over-reactive. To alleviate
this, the magnesium alloy anode should be
replaced with an aluminium alloy anode.
Aluminium alloy anodes are available from
your local Dux Supplier.
Water supplies can also be scaling. This
results in minerals being deposited in the
Pressure and Temperature Relief Valve.
If the water saturation index is above +0.40,
an expansion control valve should be fitted.
Please consult Dux After Sales and Service
for advice if required.
Solar Collectors:
The solar collectors are designed for use
in areas where the Saturation Index of
the water supply is between -1.0 and +0.80.
Water supplies with a Saturation Index below
-1.0 are corrosive and can attack copper
parts. Water supplies with a Saturation Index
above +0.80 are regarded as very scaling.
This results in minerals being deposited on
hot surfaces.
The Extended Solar Collectors Failure
Warranty does not apply in areas where
the Saturation Index is below -1.0 or above
+0.80.
Electric Boosted Models:
If the water saturation index is above +0.80,
the electric element should be replaced
with a low power density Incoloy element.
Please consult Dux After Sales and Service if
required.
Gas Boosted Models:
The instantaneous gas water heater is also
designed to suit the water conditions of most
Australian and New Zealand metropolitan
supplies.
A Water Quality Table is provided in the
instantaneous gas water heater
Installation Manual.
