Dux ProFlo 80T118 User manual

H0421 0421 Rev. N
Specications and materials may change without notice.
Effective for the above model numbers of Proo 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
Specications 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
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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 certicate, 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 sacricial 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.

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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 Specications 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. Self-
drilling 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

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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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Specifications
Specifications
Tank Size 80L 125L 160L 250L 315L 315L
TWIN
ELEMENT
400L 400L
TWIN
ELEMENT
Storage Capacity (L) 88 130 161 259 321 321 415 415
Hot Water Delivery (L) 80 125 160 250 315 315 400 400
Twin Element Boost (L) – – – – – 40 – 70
Net Weight Empty (kg) 41 51 59 72 93 93 115 115
Element(s) Sizes (kW) 1.8, 2.4,
3.6
1.8, 3.6 2.4, 3.6 3.6 3.6 2 × 3.6
or
2 × 4.8
3.6 2 × 3.6
Relief Valve:
Pressure (kPa) 1400 1400 1400 1000 1000 1000 1000 1000
Temperature (°C) 99
Power Rating (kW) 10kW
Nominal Dimensions
Tank Size 80L 125L 160L 250L 315L 400L
Total Height (A) 925 1090 1315 1445 1765 1705
Total Diameter (B) 490 530 530 620 620 705
Outlet Height (C) 735 865 1095 1210 1530 1445
Inlet Height (D) 160 190 190 195 195 220

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Filling and Draining
Filling the Water Heater:
The water heater must be lled with
water before turning on the electrical
supply.
1. Open all hot water taps.
2. Open the isolating valve at the cold
water inlet slowly and allow the
water heater to ll until water ows
through the system.
3. Close each hot water tap after the
air is expelled from its line.
4. Open the Pressure & Temperature
Relief Valve for approximately 10
seconds by lifting the easing lever
on the valve. Conrm water is
relieved to waste through the relief
valve drain pipe.
5. Lower the lever gently and check it
closes correctly.
Draining the Water Heater:
1. Turn off the electricity supply to the
water heater.
2. Turn off the cold water supply to the
water heater at the isolating valve.
3. Gently operate the easing lever on
the Pressure & Temperature Relief
(PTR) Valve to release the pressure
in the water heater.
4. Disconnect the cold water inlet
union and attach a drain hose to the
water heater.
5. Gently operate the easing lever
on the PTR Valve to let air into the
water heater and allow water to
escape through the hose.
Note: a combined isolating valve/non-return valve/line strainer may be used.
The expansion control valve is only required where local regulations demand,
although it is recommended in areas where the water saturation index is greater
than 0.40.
Cold Water Connection Diagram:

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Electrical Connection
General:
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.
Connection of the electrical wiring
must only be carried out by a licensed
tradesperson.
Connections are made at the terminal
block under the water heater electrical
cover. A means for disconnection must
be incorporated in the xed wiring in
accordance with the Wiring Rules.
Removing the Electrical Cover:
Before removing the electrical cover,
ensure the electrical power supply is
safely isolated.
The electrical cover is removed by
undoing the two screws at the bottom
of the cover and sliding the cover
downwards to disengage the top edge.
Connections:
The cable entry is a pre-punched hole
designed to accept a 20 mm conduit
gland. It is located adjacent to the
terminal block.
To prevent damage to the wiring, the
cable entry must be tted with a gland
prior to feeding the wiring through the
hole. Ensure the conduit entry is sealed
correctly.
Connect the active and neutral wires to
the terminal block and the earth wire to
the earth tab (located on the right hand
side). Excess wire is not to be looped
close to the thermostat or tank.
Replacing the Electrical Cover:
1. Press the reset button on the
thermostat to ensure the over-
temperature energy cut-out is set.
2. Check the Pressure & Temperature
Relief Valve, both of the brass plugs,
and their clear plastic packaging
have been removed from inside the
cover.
3. Ensure the terminal block mounting
plate is horizontal.
4. Slide the cover up, ensuring the top
edge engages under the case.
5. Swing the cover down until the
bottom edge contacts the case.
Ensure the terminal block mounting
plate is below the pins located
inside the cover.
6. Ret and tighten both screws in the
cover.
Ensure the water heater is lled
with water before turning on the
electricity supply.

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General:
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 and animals should be
supervised to ensure 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.
Temperature Protection:
Water heaters can produce very hot
water. To reduce the risk of scald
injury, it is mandatory 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.
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 shown on the
compliance plate. 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 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.
The PTR Valve is to be operated
regularly to remove lime deposits and
to verify it is not blocked. It is normal
for the valve to leak a small amount of
water during heating cycles.
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
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.
Safety Information

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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.
Any electrical covers should be removed
only by a licensed tradesperson, and
only after the electrical supply to the
water heater has been isolated.
In addition to the PTR 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.
Danger:
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.
Not Using Hot Water?
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.
Safety Information

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System Maintenance
Regular servicing will help to keep
the water heater operating safely and
efciently.
Six Month Service:
This service may be carried out by the
owner.
1. Stand clear of the Pressure &
Temperature Relief (PTR) Valve drain
pipe outlet.
2. Open the PTR Valve for
approximately 10 seconds by
lifting the easing lever on the valve.
Conrm water discharges to waste
through the drain pipe.
3. Lower the easing lever gently and
check it closes correctly.
4. Repeat the above process for the
expansion control valve (if installed).
Other than this, personally inspecting or
servicing any part of the water heater is
not recommended.
Five Year Service:
This service should only be carried
out by a licensed tradesperson. We
recommend your local Dux Service
Agent.
In locations where the water has Total
Dissolved Solids (TDS) exceeding 600
mg/L, this service is recommended
every 3 years.
This service should include the following:
• Replace the PTR Valve.
• Replace the anode.
• Inspect and ush the expansion
control valve (if installed).
• Drain and ush the water heater.
• Inspect the condition of the
electrical conduit and the water
heater electrical cover. Replace any
damaged components.
Replacement parts are available from
your local Dux supplier.

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It is recommended that the following
points be reviewed before making a
service call:
No Hot Water:
Ensure the power supply circuit breaker
has not “tripped”. If the water heater
is on a timed tariff such as off-peak,
ensure this is operating correctly.
High Energy Bills or Insufcient Hot
Water:
• Often the hot water usage of
showers, washing machines
and dishwashers can be under
estimated. Review these appliances
to determine if the daily usage is
greater than the capability of the
water heater.
• If necessary check the shower ow
rates with a bucket, measuring
the amount of water used over a
period of time. If it is not possible
to adjust water usage patterns, an
inexpensive ow control valve can
easily be tted to the shower outlet.
• Is the water heater the correct size
for the requirements? Sizing details
are available from your Dux supplier.
• Is there a leaking hot water pipe or
dripping hot water tap? A small leak
can waste a large quantity of hot
water. Replace faulty tap washers
and arrange for your plumber to
rectify any leaking pipe work.
• Is the Pressure & Temperature Relief
Valve discharging too much water?
See below.
Continuous Trickle of Water from
Pressure & Temperature Relief (PTR)
Valve:
This is most likely due to a build up of
foreign matter. In this case, try gently
raising the easing lever on the PTR Valve
for a few seconds, then release gently.
This may dislodge a small particle of
foreign matter and rectify the fault.
Water Discharge from PTR Valve:
It is not unusual for a small quantity of
water to discharge during the heating of
water in the storage tank. The amount
of discharge will depend on hot water
usage and the size of the storage tank.
As a guide, it will discharge about 2% of
the volume of the water heated.
Continuous leakage of water from the
PTR Valve may indicate a problem with
the water heater. Turn off the water
heater and contact Dux After Sales and
Service.
If after checking the above points,
the problem has not been identied,
please contact Dux After Sales and
Service.
Considering a Service Call?

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Warranty
Dux Electric Storage Water Heater -
Warranty Summary:
All components of the water heater are
covered by a 1 year parts and labour
warranty. The storage tank is covered for
up to a further 9 years against failure. See
below for details and conditions.
The benets provided to you by this
warranty are in addition to any other rights
and remedies available to you under the
Australian Consumer Law.
One Year Parts and Labour Warranty:
Dux Manufacturing Limited (“Dux”)
warrants against defects in the water
heater arising from faulty materials or
workmanship for a period of one year.
Conditions apply (see below).
During this period Dux will repair or replace
any failed component or where necessary,
in the absolute discretion of Dux, replace
the water heater, free of charge including
reasonable labour costs incurred during
normal business working hours.
Extended Tank Failure Warranty:
Dux also warrants against failure of the
storage tank for a further period depending
on the application:
• Nine years for single family dwellings.
• Two years for all other applications.
Conditions apply (see below).
During this period Dux will provide a
replacement water heater free of charge.
Installation and other labour costs are the
responsibility of the owner.
Warranty Conditions:
The warranty only applies to the water
heater itself and the components supplied
with the water heater by Dux. The warranty
does not cover components supplied by
others, including the installer.
The tank failure warranty does not apply if
the water heater has been connected to
a water supply where the Total Dissolved
Solids content is greater than 2500 mg/L.
These warranties do not apply to defects
that are a result of, without limitation, the
following:
• failure to install the water
heater in accordance with the
installation instructions or statutory
requirements;
• faulty plumbing or water supply
including excessive pressure;
• faulty power supply;
• use of the water heater in a manner
contrary to this manual or other
instructions provided by Dux;
• alterations or repair of the water
heater other than by an accredited
and licensed service agent or
technician;
• accidental damage or abuse.
If the water heater is installed in a position
that does not comply with the installation
instructions or statutory requirements,
then this warranty does not cover major
dismantling or removal of cupboards,
doors, walls or special equipment and/or
excessive labour, at the determination of
Dux, to make the water heater accessible
for repair or replacement.

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Warranty
Commencement of Warranty:
The warranty period commences from
the date of installation of the water heater.
Where proof of the date of installation is not
available, the warranty period commences
on the date of manufacture of the water
heater. This is shown on the compliance
plate on the outside of the water heater.
The replacement of the water heater, or a
component of it, under this warranty does
not change the warranty commencement
date. The original commencement date
continues to apply.
Consequential Losses:
Claims for damage to furniture,
carpets, walls, foundations or any other
consequential loss either directly or
indirectly due to defects of any kind in
the water heater will only be met by Dux
where the damage could be considered
reasonably foreseeable and the water
heater was installed in accordance with
the installation instructions and all relevant
statutory requirements.
The Australian Consumer Law (“ACL”):
Our goods come with guarantees that
cannot be excluded under the Australian
Consumer Law. You are entitled to
a replacement or refund for a major
failure and compensation for any other
reasonably foreseeable loss or damage.
You are also entitled to have the goods
repaired or replaced if the goods fail to be
of acceptable quality and the failure does
not amount to a major failure.
If Dux fails to meet a guarantee under the
ACL, your remedy for such failure may be
limited to any one or more of the following:
• replacement of the water heater;
• repair of the water heater;
• refunding the cost of the water heater;
• payment of the reasonable costs of
having the water heater repaired;
• payment in respect of the reduced
value of the water heater.

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Warranty
How to Make a Warranty Claim:
Warranty claims can be placed by
completing the following steps:
• Contact Dux on one of the numbers
listed below.
• Select the “Service” option followed by
the “Hot Water” option.
• Provide the serial number and model
number of the water heater. This can
be found on the compliance plate on
the outside of the water heater.
• Provide your full name, address and
contact number.
• Provide proof of date of installation
for warranty to commence from that
date, rather than from the date of
manufacture. See Commencement of
Warranty on page 12.
Please note, if the defect or fault is not
covered by the warranty or guarantee, you
will be responsible for the costs incurred by
the service agent or technician.
Contact Details:
Dux Manufacturing Limited
Lackey Road
Moss Vale, NSW, 2577
Australia
1300 365 115 (Australia)
0800 729 389 (New Zealand)
Email: [email protected]

Electric Storage Water Heaters
Serial Number
For advice, repairs and service, call:
1300 365 115 (Australia)
0800 729 389 (New Zealand)
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Installer’s Licence No: ������������������������������������������������������������������������������������������������������������������������������������ ��������
Installer’s Signature: �����������������������������������������������������������������������������������������������������������������������������������������������
www.dux.com.au/maintenance
Preventative Maintenance
Maintaining your hot water system
will help extend its lifespan and
reduce running costs.
Please register for preventative
maintenance at:
www.dux.com.au/warranty
Please Register Your Water Heater
Please take a moment to fill
out your details for warranty
registration at:
This will ensure all your current details are
registered with us for prompt warranty
service if required.
To view our privacy policy please visit
http://www.dux.com.au/p/privacy
or use your smartphone to scan this code:
H0421 0421 Rev. M