
Owner’s Manual
25L and 50L Electric Storage Water Heater
Models: 25S124, 25S136, 25S124P,
50S124, 50S136, 50S124P
Installation Details
Owner’s Information
Warranty
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.
Specications and materials may change without notice.
Effective for the above model numbers of electric storage water heaters manufactured and
sold after 1st August 2020.
028299 Rev. B

Owner’s Manual – Proflo 25/50 Litre Water Heater
Important Safety Information
WARNING – THIS APPLIANCE
MAY DELIVER WATER AT HIGH
TEMPERATURE. REFER TO THE
PLUMBING CODE OF AUSTRALIA
(PCA), LOCAL REQUIREMENTS
AND INSTALLATION INSTRUCTIONS
TO DETERMINE IF ADDITIONAL
DELIVERY TEMPERATURE CONTROL IS
REQUIRED.
WARNING – FOR CONTINUED
SAFETY OF THIS APPLIANCE IT
MUST BE INSTALLED, OPERATED
AND MAINTAINED IN ACCORDANCE
WITH THE MANUFACTURER’S
INSTRUCTIONS.
This water heater is not intended for use by
persons (including children) with reduced
physical, sensory or mental capabilities,
or lack of experience and knowledge,
unless they have been given supervision
or instruction concerning use of the water
heater by a person responsible for their
safety.
Children should be supervised to ensure
they do not interfere with the water heater.
Ensure animals are supervised so they do
not interfere with the water heater.
DO NOT store chemicals or ammable
materials, or spray aerosols near this water
heater.
DO NOT modify this water heater.
DO NOT operate the water heater with any
panels or covers removed.
If the water heater is not used for two weeks
or more, a quantity of hydrogen (which is
highly ammable) may accumulate inside the
water heater tank.
To dissipate this gas safely it is
recommended that a hot tap be turned on
for several minutes at a sink, basin or bath,
but not a dishwasher, clothes washer or
other appliance.
During this procedure there must be no
smoking, open ame or any other electrical
appliance operating nearby. If hydrogen is
discharged through the tap it will probably
make a sound similar to air escaping.
RELIEF VALVE:
The Pressure & Temperature Relief (PTR)
Valve must be installed directly into the RP½”
(DN15) socket marked “RELIEF VALVE”.
The PTR Valve rating is 1,000 kPa and
10 kW on 25L and 50L capacities.
The valve must not be tampered with or
removed. The water heater must not be
operated unless this valve is tted and in
working order.
The drain line from the PTR Valve must
be installed in a continuously downward
direction in a frost free environment.
The PTR Valve is to be operated regularly
to remove lime deposits and to verify it is
not blocked. The drain line tted to the PTR
Valve must be left open to the atmosphere.
DANGER: Failure to operate the PTR Valve
easing lever at least once every
six months may result in the water
heater exploding. Continuous
leakage of water from the valve
may indicate a problem with the
water heater.
The PTR Valve should be checked by
a licensed tradesperson for adequate
performance, or replaced at intervals not
exceeding 5 years, or less in areas where
local regulations apply.
i
028299 Rev. B

Owner’s Manual – Proflo 25/50 Litre Water Heater
Important Safety Information
It is normal for water to drip from the drain
line tted to the PTR Valve during heating
cycles.
Continuous leakage of water from the PTR
Valve may indicate a problem with the water
heater. This may be caused by excessive
water supply pressure, a faulty PTR Valve or
a faulty thermostat.
Turn off the water heater and contact Dux
After Sales and Service.
OVER-TEMPERATURE ENERGY
CUT-OUT:
The operation of the over-temperature
energy cut-out indicates a possibly
dangerous situation. Do NOT reset the
over-temperature energy cut-out until the
water heater has been serviced by a licensed
tradesperson.
ELECTRICAL SAFETY:
This water heater is designed for single
phase 240V a.c. supply only. The electrical
connection must comply with Local Supply
Authority Regulations and AS/NZS 3000
(known as the Wiring Rules). A means for
disconnection must be incorporated in the
xed wiring in accordance with the Wiring
Rules.
If the power supply cord is damaged, it must
be replaced by the manufacturer, a service
agent or a similarly qualied person in order
to avoid a hazard.
Any electrical covers should be removed only
by a licensed tradesperson, and only after
the electrical supply to the water heater has
been isolated.
When the supply wiring has been
connected, ensure the wires are kept
lower than the terminal block.
Excess wire is not to be looped close to the
thermostat or tank.
In addition to the Pressure & Temperature
Relief Valve, electric storage water heaters
are tted with a combination thermostat and
over-temperature energy cut-out.
This device must not be tampered with
or removed. Replacement of this device
must only be carried out by a licensed
tradesperson or the manufacturer.
The water heater must not be operated
unless this device is tted and in working
order.
COLD WATER CONNECTION:
The water heater is intended to be
permanently connected to the water supply
main, and not connected by a hose-set.
This water heater is designed for direct
connection to water supply pressures of up
to 800 kPa on 25L and 50L capacities.
Where the mains pressure can exceed or
uctuate beyond this pressure, a pressure
reducing valve must be tted in the cold
water inlet supply.
Instructions explaining how the water heater
can be drained can be found on page 5.
028299 Rev. B
ii

Owner’s Manual – Proflo 25/50 Litre Water Heater
Important Safety Information
INSTALLATION REQUIREMENTS
GENERAL:
This water heater must be installed by a
licensed tradesperson, and in accordance
with:
• In Australia, the Plumbing Code of
Australia (PCA);
• In New Zealand, Clause G12 of the New
Zealand Building Code (NZBC);
• AS/NZS 3000 Electrical Installations
(known as the Australian / New Zealand
Wiring Rules); and
• 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.
AS/NZS 3500.4 Plumbing and Drainage –
Heated Water Services provides a Deemed-toSatisfy Solution for the PCA and a Verication
Method for Clause G12 of the NZBC. Other
methods of compliance are available. Dux
recommends that installations conform with
AS/NZS 3500.4.
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.
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.
POOL HEATING:
not
This water heater must
heating.
be used for pool
iii
028299 Rev. B

Owner’s Manual – Proflo 25/50 Litre Water Heater
Contents
Important Safety Information i
Installation Requirements iii
Plumbing Connections 2
Specications 4
Filling and Draining 5
Electrical Connection 6
System Maintenance 7
Considering a Service Call? 8
Warranty 9
© Dux Manufacturing Limited 2020. All rights reserved.
028299 Rev. B
1