Dux 80T118, 80T124, 80T136, 125T118, 125T136 Owner's Manual
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H0421 0421 Rev. N
Specications and materials may change without notice.
Effective for the above model numbers of Proo electric storage water heaters manufactured and
sold after 1st October 2016.
Owner’s Manual
Electric Storage Water Heaters
Standard Models:
80T118, 80T124, 80T136, 125T118,
125T136, 160T124, 160T136, 250T136,
315T136, 315T236, 315T248
400T136, 400T236
An ‘H’ at the end of the model number indicates that the
water heater is tted with a hard-water anode.
For advice, repairs and service, call:
1300 365 115 (Australia)
0800 729 389 (New Zealand)
Carefully remove all packaging and
transit protection from the heater before
installation. Dispose of the packaging
responsibly using re-cycling facilities
where they exist.
Installation Details
Owner’s Information
Warranty
Owner’s Manual – Proflo Electric Storage Water Heaters
H0421 0421 Rev. N
Installation Requirements 1
Plumbing Connections 2
Specications 4
Filling and Draining 5
Electrical Connection 6
Safety Information 7
System Maintenance 9
Considering a Service Call? 10
Warranty 11
© Dux Manufacturing Limited 2016. All rights reserved.
Contents
Owner’s Manual – Proflo Electric Storage Water Heaters
1
H0421 0421 Rev. N
Installation Requirements
General:
This water heater must be installed
by a licensed tradesperson, and in
accordance with:
• AS/NZS 3500.4 Plumbing and
Drainage – Heated Water Services.
• Clause G12 of the NZ Building
Code (in New Zealand).
• AS/NZS 3000 Electrical Installations
(known as the Australian / New
Zealand Wiring Rules).
• Local authority regulations.
• Outside Australia and New Zealand,
please refer to local plumbing and
building codes and regulations.
Failure to comply with these
requirements may affect the warranty.
Note for Victoria:
This water heater must be installed by
a licensed person as required by the
Victorian Building Act (1993).
Only a licensed person will provide a
compliance certicate, showing that
the work complies with all the relevant
Standards. Only a licensed person
will have insurance protecting their
workmanship.
Pool Heating:
This water heater must
not
be used for
pool heating.
Location:
The water heater should be located as
close as possible to the most frequently
used hot water outlet.
Ensure the compliance plate and
associated warnings are clearly visible.
The water heater must be accessible
without the use of a ladder or scaffold.
Adequate clearance must be available
for service to the element, thermostat,
relief valve and anode. All models are
equipped with a sacricial anode, allow
half of the height of the water heater to
provide access through the top cover.
Electric storage water heaters may be
installed indoors. A properly drained
safe tray must be installed where
property damage could occur from
water spillage. Refer to AS/NZS 3500.4
for further information.
Note - the warranty will not cover
damage due to leakage of the water
heater if a properly drained safe tray has
not been installed.
Refer to local regulations before
installing the water heater in a roof
space.
Water Heater Support:
The water heater must be installed on
a at, solid supporting surface. The
pipework must not be used to support
the water heater.
Where the water heater is subjected
to wet conditions, a plinth should be
installed under the water heater.
Owner’s Manual – Proflo Electric Storage Water Heaters
2
H0421 0421 Rev. N
Relief Valve:
The Pressure & Temperature Relief (PTR)
Valve is supplied inside the electrical cover
of the water heater. Instructions on how
to remove the electrical cover can be
found on page 6. Discard the clear plastic
packaging containing the PTR Valve and
brass plugs.
The PTR Valve rating depends on the size
of the water heater. See Specications on
page 4 for details.
The PTR Valve rating is also shown on the
compliance plate. The PTR Valve must
be installed directly into the RP½”(DN15)
socket marked “RELIEF VALVE” at the top
of the water heater. Ensure that a sealing
material is applied to the PTR Valve to
prevent water leaks.
The drain line from the PTR Valve must be
made of copper and run in accordance
with the requirements of AS/NZS 3500.4.
It must be installed in a continuously
downward direction in a frost free
environment.
The PTR Valve and its drain line must not
be sealed or blocked. Generally a separate
drain line must be run for the valve although
it may be joined with the drain line from
the expansion control valve under certain
circumstances.
Care must be taken when attaching
pipe saddles to the water heater. Selfdrilling screws no longer than 12 mm are
recommended.
It is normal for the valve to leak a small
amount of water during heating cycles.
The PTR Valve is not intended to enable
connection of the water heater to
supplementary energy sources such as
solar panels or slow combustion stoves.
Refer to AS/NZS 3500.4 for guidance on
these types of installations.
Hot Water Connection:
The hot water pipe is to be connected to
either of the RP¾”(DN20) sockets marked
“OUTLET” at the top of the water heater.
The unused socket marked “OUTLET” is
to be plugged with one of the brass plugs
supplied inside the electrical cover of the
water heater. Ensure that a sealing material
is applied to the brass plug to prevent
water leaks.
It is recommended that all hot water pipes
are insulated. Hot water pipes installed
outdoors should be insulated with UV
stabilised insulation.
Plastic pipes or ttings shall not be used
within 1 metre of the outlet although they
may be used downstream of a temperature
control valve. Refer to AS/NZS 3500.4 for
further details.
Temperature Protection:
Water heaters can produce very hot water.
To reduce the risk of scald injury, it is
mandatory under the requirements of
AS/NZS 3500.4 that an approved
temperature control device is tted to the
hot water supply to outlets used primarily
for personal hygiene. This device should be
checked at regular intervals to ensure its
operation and settings remain correct.
Plumbing Connections
Owner’s Manual – Proflo Electric Storage Water Heaters
3
H0421 0421 Rev. N
Plumbing Connections
Water Supply:
This water heater has been manufactured
to suit the water conditions of most
Australian metropolitan supplies.
Please note certain water supplies can
have a detrimental effect on the water
heater and its life expectancy. If you are
unsure about the water supply you can
obtain information from the local water
supply authority.
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 600 mg/L,
it is possible the magnesium alloy anode
(supplied in standard water heaters) may
become over-reactive. To alleviate this, a
hard water model is recommended, or
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 tted. 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 tted
between the water supply main and either
of the RP¾”(DN20) sockets marked
“INLET” at the bottom of the water heater.
See the diagram on page 5 for details.
All ttings must be approved by the
relevant Authority. Plastic pipes or ttings
shall not be used between the isolating
valve and the inlet.
The unused socket marked “INLET” is to be
plugged with one of the brass plugs supplied
inside the electrical cover of the water heater.
Ensure that a sealing material is applied to
the brass plug to prevent water leaks.
Water Supply Pressure:
This water heater is designed for direct
connection to water supply pressures of
up to 1,120 kPa for 80L, 125L and 160L
models, and 800 kPa for all other models.
Where the mains pressure can exceed or
uctuate beyond this pressure, a pressure
reducing valve must be tted 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 tted on
the cold water supply line between the
non-return valve and the water heater.
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