AquaMAX EM50 Series - Manual (Page 13)

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water supply TDS exceeds 600 mg/Litre, the magnesium alloy anode
(supplied as standard, cap colour code ‘Black’) should be replaced with an
aluminium alloy anode (cap colour code ‘Blue’). For more information refer
to “Water Chemistry & Anode Type” on page 12.
In locations where TDS approaches 600 mg/Litre, e.g. due to sediment, we
strongly recommend fitting an appropriate filter to ensure water entering or
in the water heater does not exceed this level at any time i.e. due to
sediment build up.
Water Chemistry & Anode Type
Aquamax water heaters are designed to suit the water conditions of most
metropolitan supplies, where the Total Dissolved Solids (TDS) content of
the supply is less than 600 mg/Litre. For use in regions where the water
supply TDS exceeds 600 mg/Litre, the magnesium alloy anode (supplied
as standard, cap colour code ‘Black’) may become excessively reactive.
For safety reasons and the longevity of the anode, the magnesium anode
should be replaced with an aluminium alloy anode (cap colour code ‘Blue’)
available from your Aquamax supplier. Anode replacement must be carried
out by an Aquamax accredited service agent.
Warning: If the water supply has a TDS greater than 600 mg/Litre and
the anode has not been changed to a blue anode, there is the possibility
the anode may become overactive and hydrogen gas could accumulate in
the top of the water heater during long periods of no use.
If the water heater has not been used for two or more weeks, follow the
procedure detailed in the “Anode” section on page 10 for safe dissipation of
the hydrogen gas build up inside the storage cylinder.
It must be noted that in areas where the TDS exceeds 600 mg/Litre, the
Aquamax warranty will not cover resultant faults on components including
the storage cylinder that fail due to the bad water conditions even though
an aluminium anode is fitted. Refer to “Water Chemistry Levels Affecting
Warranty” below for water chemistry levels and components affected.
The life of the water heater may also be extended by periodic inspection of
the anode and replacement if necessary (refer to “Periodic Maintenance”
on page 8 and “Anode” on page 10).