Dux 2F136S User manual

Owner’s Manual
Electric Boosted Solar Water Heater
Specications and materials may change without notice.
Effective for Dux electric boosted solar water heaters manufactured and sold after 1 April 2009.
Models: 2F136S
3F136S
4F136S
Part No: H3100
Version: 10346D
For advice, repairs and service, call:
1300 365 115 (Australia)
0800 729 389 (New Zealand)
Installation Details
Commissioning
Owner’s Information (warranty)

Owner’s Manual – Electric Boosted Solar
Part No: H3100
Version: 10346D
Welcome To Dux Hot Water 1
Installation Details – Tank 2
Installation Details 3
Plumbing Connections 4
Specications 7
Installation – Collectors 8
Plumbing Connections –
Collectors 12
Plumbing Connections – Tank To
Collectors 14
Electrical Connections 16
Hotlogic Connections 17
Owner’s Information 18
Troubleshooting 22
Warranty 24
Warranty Card 28
Contents

Owner’s Manual – Electric Boosted Solar
1
Part No: H3100
Version: 10346D
Welcome To Dux Hot Water
Your decision to purchase a Dux Hot
Water system will reward you for many
years to come.
The Dux range has seen continuous
research and development, resulting in
many breakthroughs in the efciency,
reliability and longevity of hot water
systems.
Dux water heaters are manufactured
in Australia in a state-of-the-art facility,
using a Quality Endorsed Company
production system.
This is your assurance that you have
purchased the highest quality water
heater available, one that will provide
continuous hot water for all your needs
– safely, economically, and for many
years to come.
To be upfront about it, we want Dux to
be your brand of choice. So you can
depend on us to provide more than just
a hot water system.
You can rely on Dux products and
choose them with condence. We’ll
make sure you have the information, the
quality and the innovation you’re looking
for, including the latest energy-saving
alternatives. If you should ever have a
problem – and we’ll bet you won’t –
you’ll nd that we’re easy to get hold of,
friendly to talk to and quick to act. Our
service is all about providing anything
you need as soon as you need it.
Go with Dux and you’ll have a
dependable, economical, efcient hot
water system designed to perform well,
year after year. And that’s a promise.

Owner’s Manual – Electric Boosted Solar
2Part No: H3100
Version: 10346D
Installation Details – Tank
Location
The water heater should be located as
close as possible to the most frequently
used hot water outlet. Ensure that the
data plate is clearly visible and provide
adequate access for service to the
thermostat, relief valve and anode.
Note: All models are equipped with a
sacricial anode, accessible through the
top cover. Allow 50% of the height of
the water heater for clearance above to
replace the anode.
This water heater must be installed
on a re-proof base.
The water heater has a metal base so it
is recommended that a concrete plinth
be installed under the water heater to
protect the heater when subjected to
wet conditions.
A properly drained overow tray must
be used where property damage could
occur from water spillage. (See AS/
NZS3500.4 for further details.)
Note: Warranty does not cover
consequential damage due to heater
leakage.

Owner’s Manual – Electric Boosted Solar
3
Part No: H3100
Version: 10346D
Installation Details
Frost Protection Installation Map
All locations highlighted in gray require an approved antifrost protection device to
maximise system performance. Call Dux Hot Water 1300 365 115 for further information.

Owner’s Manual – Electric Boosted Solar
4Part No: H3100
Version: 10346D
Plumbing Connections
This water heater must be installed
by a licensed tradesperson, and in
accordance with:
AS/NZS3500.4 “National Plumbing •
and Drainage Code Hot Water
Supply Systems – Acceptable
Solutions”.
Local authority regulations.•
Outside Australia and New Zealand, •
please refer to local plumbing and
building codes and regulations.
Notice to Victorian customers •
from the Victorian Plumbing
Industry Commission – this water
heater must be installed by a
licensed person as required by the
Victorian Building Act (1993). Only
a licensed person will give you a
compliance certicate, showing
that the work complies with all
the relevant Standards and only a
licensed person will have insurance
protecting their workmanship for 6
years.
Note: This water heater is not suitable
for pool heating.
This water heater is designed for direct
connection to water supply pressures of
no greater than:
250 Litre Model – 800kPa
315 Litre Model – 800kPa
400 Litre Model – 800kPa
Where the mains pressure can exceed
or uctuate beyond the pressure
shown above a pressure limiting device
(complying with AS1357) must be
tted in the cold water inlet supply.
This device must be installed after
the isolating valve and set below the
pressure shown above. Note during
periods of lower demand water pressure
may increase.
Caution: This water heater delivers
hot water at temperatures exceeding
50°C. Refer to AS/NZS3500 and local
regulations regarding the need for
additional temperature control of hot
water delivery.
Union
Connection
Non-return
Valve
Line
Strainer
Cold Water
Inlet
Expansion
Valve*
Isolating Valve
(Spindle Vertical)
Note: a combined isolating valve/non-
return valve/line strainer may be used.
Expansion valve only required where local
regulations demand.

Owner’s Manual – Electric Boosted Solar
5
Part No: H3100
Version: 10346D
Plumbing Connections
Pressure & Temperature Relief
Valve
The Pressure & Temperature Relief Valve
is supplied loose with the water heater.
The valve rating is:
250 Litre Model – 1000kPa
315 Litre Model – 1000kPa
400 Litre Model – 1000kPa
The relief valve must be installed directly
into the top socket marked “RELIEF
VALVE”. The drain line from this valve
must run in a continuously downward
direction in a frost-free ambient position
with the discharge end left open to
atmosphere permanently. The Pressure
& Temperature Relief Valve supplied
with the water heater is not intended to
enable connection of the water heater to
supplementary energy sources such as
solar panels or slow combustion stoves
(refer AS/NZS 3500.4 for guidance on
these types of installations)
Warning: Operation of the relief valve
easing gear at least once every six (6)
months is recommended.
Danger: Failure to operate the relief
valve easing gear at least once every six
(6) months may result in problems with
the water heater
Note: Plugs are supplied with the water
heater to plug off the ttings that are not
required. Ensure that a sealing material
is applied to the plugs to prevent
leaking.
Important: The Pressure & Temperature
Relief Valve and the drain outlet pipe
must not be sealed or blocked. It is
normal for the valve to overow during
heating cycles.
Cold Water Connection
An approved isolating valve, non
return valve, line strainer (optional but
recommended), and union must be
tted between the supply main and the
RP¾/20 socket in the water heater.
All ttings must be approved by the
relevant Authority.
Note for S.A. and W.A.: It is a state
requirement that a pressure relief valve
be tted on the cold water supply line
between the non return valve and the
water heater
Hot Water Connection
The hot water line should be connected
to the RP¾/20 socket marked as
OUTLET. For the most economical
operation of the water heater, it is
recommended that all hot water lines
are insulated with high temperature, UV
resistant 13mm closed cell insulation.
Please check local regulations regarding
the use of hot water supply pipework
other than pipes made of copper.

Owner’s Manual – Electric Boosted Solar
6Part No: H3100
Version: 10346D
Plumbing Connections
Safety Information
For safe performance this water heater
is tted with:
an over-temperature energy cut-out •
thermostat
a combination Pressure & •
Temperature Relief Valve.
These devices must not be tampered
with or removed. The water heater must
not be operated unless both of these
devices are tted and in working order.
The element cover should be removed
only by an electrician. The electrical
power supply switch must be turned
off and the fuse removed at the main
electrical supply switchboard before the
water heater electrical cover is removed.
The Pressure & Temperature Relief
Valve should be checked for adequate
performance or replaced at intervals
not exceeding 5 years, or less in areas
where local regulations apply. The lever
on the relief valve should be pulled to
operate the valve at least once every 6
months.
Temperature Protection
All solar water heaters have the ability
to produce hot water very quickly.
To reduce the risk of scald injury, it is
mandatory under the requirements of
Australian Standard AS/NZS3500.4.2
that a suitably approved temperature
control device be tted to the hot water
supply to outlets used primarily for
personal hygiene. This valve should be
checked at regular intervals to ensure its
operation and settings remain correct.
Note: All Dux solar water heaters are
supplied with tempering valves. Any
adjustment to the valve should be
made according to the manufacturer’s
recommendations.

Owner’s Manual – Electric Boosted Solar
7
Part No: H3100
Version: 10346D
Specifications
1
8
4
6
2
7
3
5
B
A
C
D
E
Specifications 250L 315L 400L
Storage Capacity (L) 259 324 416
Hot Water Delivery (L) 250 315 400
Net Weight Empty (kg) 90 105 120
Relief Valve Pressure (kPa) 1000 1000 1000
Dimensions
(mm)
250L 315L 400L
Tank Height (A) 1444 1754 1703
Tank Diameter (B) 617 617 705
Tank Width (C) 718 718 806
Outlet (D) 1231 1541 1466
Inlet (E) 215 215 240
System Components
Item
Number
Description
1 Solar Electric Tank Assy
2 Solar Collector Panel
3 Solar Collector Panel Fitting Kit
4 Solar Collector Sensor Lead
5 Tank – Collector Pipework
6 Air Bleed Valve
7 Ant-Frost Valve
8 Non Return Valve

Owner’s Manual – Electric Boosted Solar
8Part No: H3100
Version: 10346D
Installation – Collectors
Please ensure that sufcient roof space
is available to install the solar collectors
in the desired location.
Please allow the following roof space for
collector installation
2 collector panels – 3 meters wide • ×
3 meters high.
3 collector panels – 4.5 meters wide •
× 3 meters high
It is not advisable to install collectors
on roof spaces that are smaller than
described.
Solar Collector Installation
Note: Do not commence an installation
until you have satised yourself that all
Safety issues associated with working
on and lifting components onto a roof
have been addressed.
Important: All work associated with
the installation must comply with local
authority regulations including AS/
NZS 3500.4.2. Where these installation
instructions and local regulations are in
conict, local regulations must prevail.
Solar Collector Location Selection
There are ve major factors to consider in
selecting the solar collector location site.
For optimum performance, the solar 1.
collectors need to face the equator
(in Australia this is north). Due to the
high solar energy levels experienced
in Australia, installations on angles
of up to 45° away from north will
not have a major effect on the
annual solar output. Consequently
installations up to 45° away
from north are acceptable. If the
collectors are installed with an east
facing bias, the best solar input is
achieved in the morning and if there
is a west facing bias, the best solar
input is in the afternoon.
Careful site inspection is required to 2.
ensure the selected location is not
subjected to shading from adjacent
trees or buildings at any time of the
day, but particularly between 9am
and 3pm, the highest solar input
times. You must remember that
shadows are longer in winter than
in summer, so a site that is free of
shadows from adjacent objects in
summer may have some shadows
in winter.

Owner’s Manual – Electric Boosted Solar
9
Part No: H3100
Version: 10346D
Installation – Collectors
For optimum performance the 3.
collectors should be located no
more than 20m from the storage
tank. To optimise efciency, the
collectors should be as close
as possible to the storage tank.
Irrespective of the pipe length, it is
important that both the solar ow
and return lines are insulated with
high temperature, UV stabilized
13mm closed cell insulation to
minimise heat loss.
Ensure that the roof structure is 4.
suitable to support the weight of the
collectors. The Dux collectors weigh
approximately 40kg each when
lled with water or heat exchange
uid.
The collectors should be installed 5.
with a minimum inclination of
10 degrees and a maximum
inclination of 45 degrees.
True North
Surface Plate EastWest
Note: When establishing the correct Collector Orientation, please account
for the Magnetic Declination of your geographic location
45°
70°
50°
45°
North West
North East
A
d
d
i
t
i
o
n
a
l
C
o
l
l
e
c
t
o
r
R
a
n
g
e
I
n
d
u
s
t
r
y
A
c
c
e
p
t
e
d
R
a
n
g
e
D
u
x
P
r
e
f
e
r
r
e
d
R
a
n
g
e
Min 10°
A
A = 500mm, or greater if roof allows
inclination
Collector Orientation Compass
Collector Inclination Guide

Owner’s Manual – Electric Boosted Solar
10 Part No: H3100
Version: 10346D
Installation – Collectors
Collector Mounting Kits
The Collector Mounting Kits are
designed for mounting the solar
collectors to most common Australian
roong types. The kit consists of
specially designed rails that are bolted
to the collector then xed to the roof
structure using standard roong screws
or bolts.
Please refer to the collector
mounting kit instructions located in
the mounting kit box. The mounting
kit instructions can also be obtained
from Dux Service 1300 365 115.
For installations requiring three
collectors, an additional Collector
Mounting Kit is required as an extension
to increase the mounting capacity from
two to three collectors.
Collector installation
After selecting the solar collector
location, the nal check before
installation is that the available roof
space is sufcient for the solar collectors
being installed. For a two solar collector
installation the available roof space must
be at least 3 metres wide and for a three
solar collector installation the available
roof space must be at least 4 metres
wide.
Roof areas smaller than these minimum
measurements will make installation,
and later service work, difcult.
Collector mounting rails

Owner’s Manual – Electric Boosted Solar
11
Part No: H3100
Version: 10346D
Installation – Collectors
Collector Connection And
Mounting Kits
There are a number of Collector
Connection and Mounting Kits for
mounting and connection of the solar
collectors to most common roong
types.
All kits consist of specially designed
rails, clamps and bolts etc. that are
use to x to the roof structure. With the
exception of the copper tube, these kits
contain all of the plumbing components
required to connect the solar collectors
to the ground mounted water heater.

Owner’s Manual – Electric Boosted Solar
12 Part No: H3100
Version: 10346D
Plumbing Connections –
Collectors
Connections To The Collectors
(Open Circuit Systems Only)
Connect the sealing ttings to the four
outer connections on the collector array:
Fit a sealing washer and plug 1.
assembly to the top left and bottom
right corners of the array.
Tighten the assembly taking a.
care not to twist the copper
tubes of the collector.
Ensure you use correctly sized b.
spanners.
Screw t the Air Bleed Valve into 2.
the top 3⁄8" BSP socket and hand
tighten until the nylon ring seals
against the socket face.
Important: Please open the silver
knob on top of the valve two turns
anti clockwise.
Fit the sealing washer and union 3.
base tting to the top right hand
socket of the collector array.
Locate the 4 Way Connection Union 4.
assembly onto the union base,
then tighten with the air bleed valve
vertical. (NB: The air bleed valve
should be at the highest position on
the collectors).
Finally insert a washer and ¾ to 5.
½ conetite union to the lower left
collector socket.
The collector array is now completed
and ready for connection to the water
heater system.
Warning: Copper and brass ttings
must be use in all parts of this
connection. Plastic ttings and PVC
pipes are NOT able to withstand the
high temperatures >200ºC that the
system can create.
Failure to use ttings with a high
temperature rating WILL void the
warranty.

Owner’s Manual – Electric Boosted Solar
13
Part No: H3100
Version: 10346D
Plumbing Connections –
Collectors
System Components
Component Description
1 Air bleed valve
2 Bush
3 15mm Female Tee
4 Union 15mm M ×15mm C
5 Sensor Dry Well
6 Hex nipple
7 Union 1" C ×1/2" M
1
2
3
4
5
6
3
7

Owner’s Manual – Electric Boosted Solar
14 Part No: H3100
Version: 10346D
To make the connection between the
solar collector array and the storage
tank the following is required.
2 1. × ½" (15 mm) copper tubes fully
insulated with closed cell polymer
insulation (min. 13mm UV resistant),
run from the collector array down to
storage tank.
1 2. × 2 core cable (supplied in kit)
run from the collector array to the
storage tank.
To complete this connection, do the
following:
Connect one ½" insulated copper 1.
tube to the ½" BSP Compression
Union Assembly at the bottom
left hand corner of the array and
run down to the ground mounted
storage tank location. This tube
is known as the Collector Cold
Connection.
Connect the second ½" insulated 2.
copper tube to the Hot Connection
assembly at the top right hand
corner connection of the array and
run down to the ground mounted
storage tank location. This tube
is known as the Collector Hot
Connection.
Connect the 2 core cable (20 3.
metres – supplied) to the two wires
of the BLACK insulated temperature
sensor (RED ring around the wire
to indicate for hot water). Ensure
that the connection is secure and
safe. Use a connector block. Insert
the temperature sensor into the
temperature sensor well of the
hot connection union assembly.
Fix in place using cable bracket
connected to hot connection tting
and seal using a small amount of
silicon adhesive/sealant. Run the
cable down to the ground mounted
storage tank location. (It is important
that the sensor cable DOES NOT
contact the hot collector return
pipe). This sensor is known as the
Collector Temperature Sensor.
Ensure that the sensor wire does
not come in contact with the hot
collector return pipe.
Note: Care must be taken to ensure
that all roof penetrations are sealed to
prevent water ingress and to comply
with all local regulations.
Plumbing Connections –
Tank To Collectors

Owner’s Manual – Electric Boosted Solar
15
Part No: H3100
Version: 10346D
Connections At The Ground
Mounted Storage Tank
Note: The tank has been pre congured
for the hot collector return to be
connected to the right hand side of
the tank (as marked). The left hand hot
outlet is for the hot water supply to the
house.
Finally, take the collector temperature
sensor cable and pass them through the
bottom of the Hotlogic™ module, then
up into the upper section.
Connect the collector temperature
sensor cables to the vacant terminals
(refer to page 17 Hotlogic module
connections).
The polarity of the connections is not
important.
Non Return Valve
The hot water return pipe from the solar
panel should have a solar non return
valve tted where the pipe enters the
tank.
Note: Dux recommends an RMC non
return valve, product code SNR502. All
pipe work must be insulated.
Ensure the non return valve is installed
according to the ow direction arrow on
the valve.
Hot
Water
Flow
Direction
RELIANCE
FLOW
Flow Direction Arrow
Plumbing Connections –
Tank To Collectors

Owner’s Manual – Electric Boosted Solar
16 Part No: H3100
Version: 10346D
Electrical Connections
This water heater is designed for
connection to the following:
Solar Pump Module – •
CONTINUOUS TARIFF
Tank Boost – Off Peak, single phase •
240V A.C. supply
Note: This Water heater is also
designed to allow the tank boost to be
connected to continuous tariff to satisfy
heavy daytime users of hot water that
exceed the capacity of the off peak
boost option.
The electrical connection must comply
with Local Supply Authority Regulations
and AS3000.
For models not pre-wired with a exible
lead, connections are made at the
terminal block inside the water heater.
For the electrician, the access cover
may be removed by undoing the two
screws on the cover and sliding the
cover downward to disengage it from
the case. Ensure that the conduit
entry is well sealed to achieve correct
weatherproong.
Note: The water heater is tted with a
thermostat and over-temperature energy
cut-out. Under no circumstances should
the water heater be operated without
both these devices being in the circuit.
Replacement must be carried out only by
a qualied electrician or the manufacturer.
Danger: The operation of the thermal
cut-out indicates a possibly dangerous
situation. Do NOT reset the thermal
cutout until the water heater has been
serviced by a qualied person.
Flexible Leads
If the power supply lead is damaged, it
should be replaced by a lead assembly
available only from Dux Manufacturing
service agents.
Pump Module Electrical Connec-
tion (All Models)
All electrical work must comply with 1.
local regulations.
All electrical work must be 2.
conducted by a licensed electrician.
The electrical supply to the pump 3.
module must be continuously
available. Off Peak power must not
be used.
Connections are made at the terminal
block inside the water heater. Entry to
the connection area is through the hole
beneath the element cover, designed to
accept a 20mm conduit.
Caution: The water heater must be
lled with water before turning on the
electricity supply.
Electrician: Press the reset button
on thermostat(s) to ensure over-
temperature cut-out is set.

Owner’s Manual – Electric Boosted Solar
17
Part No: H3100
Version: 10346D
Hotlogic Connections
Hotlogic™ Solar Pump
And Controller Module
The Hotlogic box should be plugged
in to a weatherproof approved power
outlet for 10amps, 230 to 250 volt, 50Hz
supply.
The Hotlogic controller must be wired
according to the diagram below.
Power
LED
(Green)
Status
LED
(Red)
Bottom Tank Sensor (BLACK)
Collector Sensor
(2 Core Speaker Wire)
Top Tank Sensor (GREY)
Hotlogic Diagnosis Codes
Power LED
(Green)
Status LED
(Red)
Explanation
Alternating Power on initialisation (LEDs blink alternately)
On Off All sensors normal, pump off
On On All sensors normal, pump on or booster on
Flashing Off Sensor error (collector or tank)
Off Flashing Tank bottom sensor error
Flashing Flashing Tank top sensor error
Note: If any sensor is open circuit, the system will indicate a Green only flashing LED.

Owner’s Manual – Electric Boosted Solar
18 Part No: H3100
Version: 10346D
Owner’s Information
How Does My System Work?
The main components of your solar
water heater are the water storage
tank, the solar collector(s), the patented
Hotlogic™ controller and the Ancillary
Energy Support (AES) or electric
booster. The Dux water storage tank is
used to store the heated water ready for
household use. It is a specic Solar Dux
electric storage tank, incorporating a
high temperature vitreous enamel lining
to provide long life, and a high density
polyurethane insulation to ensure
minimal heat loss.
The solar collectors contain a multi tube
copper water way system bonded to a
solar absorber plate, the combination of
which collects solar energy and transfers
it to the uid within the collector circuit.
The absorber plate system is enclosed
in an insulated casing covered with a
high strength, low iron glass sheet that
protects the absorber system from
physical damage.
The Ancillary Energy Support System
(electric boosting – connected to
continuous electricity supply) is used to
heat part of the stored water on those
occasions when there is reduced solar
energy available, e.g. cloudy days.
The AES System is thermostatically
controlled so it only delivers the energy
required, then automatically turns off.
Under normal operating conditions, the
water within the storage tank is heated
by the solar collectors.
In an Open Circuit system, the water is
in the collector circuit and the circulating
pump draws cold water from the cold
inlet or the bottom of the tank and
pushes it up into the solar collectors.
The water is heated in the collector
by absorbing heat from the sun and
continues on its pumped circulation path
back to the bottom (opposite to the inlet)
of the storage tank, ready for use.
What Does The Circulation Pump Do
In The System?
The circulation pump is a simple device
used to circulate the water in the
collector circuit. This, in turn, enables
solar energy from the collectors to be
transferred to the storage tank location.
The pump consumes only a very small
amount of electrical energy (less than
28 watts) to perform this task. The
circulation pump has an integral ‘non-
return valve’ to prevent solar energy
from reverse cycling back through the
storage tank to the collectors at night.
The electronic control device used
to control the circulation pump has a
complex set of activities. It is the brain
of the system and ensures optimum
system efciency and safety. The basic
functions are:
Detecting availability of useful solar 1.
energy in the solar collectors.
When the temperature of the solar
collector is 10°C higher than the
storage tank temperature, the