Dux Proflo 25S124 Manuale d'uso - Pagina 7
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The water heater is designed for use in areas
where the Total Dissolved Solids (TDS) content
of the water supply is less than 2500 mg/L.
The Tank Failure Warranty does not apply in
areas where the TDS exceeds 2500 mg/L.
In areas where the TDS exceeds 600mg/L, it is
possible the magnesium alloy anode (supplied
in standard water heaters) 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 can also be very corrosive, the measure
of this is the saturation index. If the water
saturation index is greater than 0.40, an
expansion control valve should be fitted. If
the index is greater than 0.80, the electrical
heating element should be replaced with a low
power density Incoloy heating element. Please
consult Dux After Sales and Service for advice
if required.
Cold Water Connection:
The water heater is intended to be permanently
connected to the water supply main, and not
connected by a hose-set.
An approved isolating valve, non-return valve, line
strainer (optional but recommended) and union
must be fitted between the water supply main
and either of the RP¾"(DN20) sockets with blue
surrounds at the bottom of the water heater. See
the diagram on page 5 for details.
All fittings must be approved by the relevant
Authority. Plastic pipes or fittings shall not be
used between the isolating valve and the inlet.
The unused socket with blue surrounds is to be
plugged with one of the brass plugs supplied
loose with the water heater. Ensure that a
sealing material is applied to the brass plug to
prevent water leaks.
028299
Rev. B
Owner's Manual – Proflo 25/50 Litre Water Heater
Plumbing Connections
Water Supply Pressure:
This water heater is designed for direct
connection to water supply pressures of up to
800 kPa .
Where the mains pressure can exceed or
fluctuate beyond this pressure, a pressure
reducing valve must be fitted in the cold water
inlet supply.
Note for New Zealand, South Australia and
Western Australia:
It is a requirement in these locations that an
expansion control valve be fitted on the cold
water supply line between the non-return valve
and the water heater.
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