Page 1
Owner’s Manual
Pre Boosted Gas Solar Water Heater MP15
Models: DN15DS
DL15DS
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 Sunpro gas boosted solar water heaters manufactured and sold after 1 April 2011.
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Contents
Welcome To Dux Hot Water 1
Installation of the Tank 2
Plumbing Connections 4
Specications 7
System Components 8
Installation of Collectors 10
Plumbing Connections to
Collectors 13
Gas Connection 15
Electrical Connections 16
Hotlogic Connections 17
Owner’s Information 18
System Maintenance 22
Troubleshooting 23
Warranty 25
Other Information 28
© Dux Manufacturing Limited 2012. All rights reserved.
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Welcome To Dux Hot Water
Your decision to purchase a Dux Hot
Water system will reward you for many
years to come.
Since 1915, the Dux range has seen
continuous research and development,
resulting in many breakthroughs in the
efciency, 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.
Go with Dux and you’ll have a
dependable, economical, efcient hot
water system designed to perform well,
year after year. And that’s a promise.
You can rely on Dux products and
choose them with condence. 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.
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Installation of the Tank
Installer’s Guide
Full and detailed installation instructions
are in the Installer’s Guide, included
inside the water heater’s carton.
Outdoor Tank Installation
The water heater must be installed
outdoors, with the minimum clearances
as shown in the gure below.
We recommend a plinth be installed
under the water heater where the
water heater is subjected to wet
conditions. Please refer to AS/NZS
3500.4, clause 5.5.3.
Minimum clearance around the windows
and doors must be maintained – refer to
AS 5601.
Location
The water heater should be located as
close as possible to the most frequently
used hot water outlet. Ensure that the
data label is clearly visible and that there
is adequate access for servicing the unit.
Note: All models are equipped with a
sacricial anode, accessible through the
top cover. Allow 50% of the height of
the water heater for clearance above to
replace the anode.
A properly drained overow tray must
be used where property damage
could occur from water spillage. (See
AS/NZS3500.4.2 for further details).
Warranty does not cover consequential
damage due to heater leakage.
Safety
This appliance 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 appliance by a person
responsible for their safety.
Children and animals should be
supervised to ensure that they do not
interfere with the appliance.
B
A
C
A = 500mm B=300mm C=50mm min
For further details, refer to
AS5601 – Gas Installation Code
2
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Installation of the Tank
Installation of the Tank
Frost Protection
The areas in gray in the map below may
be vulnerable to frost. Solar hot water
heaters installed in these areas require
an approved antifrost protection device
to maximise system performance.
Note: The Gas Boosted Solar water
heater already has an in-built frost
protection device, so no further antifrost
protection is required.
Model Numbers
Below is a list of model numbers and
their descriptions:
Model No. Description
DN15DS 315 Litre, 45 MJ/h, Natural Gas
DL15DS 315 Litre, 45 MJ/h, LPG
H4096 4096 Rev. D
Auckland
Wellington
Christchurch
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Plumbing Connections
Installation Requirements
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”.
• AS5601/AG601 “Gas Installations”
• 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 certicate, showing
that the work complies with all
the relevant Standards and only a
licensed person will have insurance
protecting their workmanship for 6
years.
Water Supply Pressure
This water heater is designed for direct
connection to water supply pressures of
no greater than:
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.
Pool Heating
This water heater must not be used for
pool heating.
4
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Plumbing Connections
Pressure & Temperature Relief
Valve
The Pressure & Temperature Relief (PTR)
Valve is supplied loose with the water
heater. The valve rating is:
1000kPa
The specications and part numbers of
the PTR Valve provided are:
Part No: H0443
Description: PT VALVE ½" – HT55
1000kPa
The PTR 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 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 AS/NZS 3500.4 for guidance on
these types of installations).
Warning: We recommend that you
open the PTR valve at least once every
six (6) months. Failure to do this may
result in problems with the water heater.
The PTR 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 for
adequate performance or replaced at
intervals not exceeding 5 years, or less
in areas where local regulations apply.
Important: The PTR Valve and its
drain outlet pipe must not be sealed or
blocked. It is normal for the PTR valve
to leak a small amount of water during
heating cycles.
Open the PTR Valve for approximately
10 seconds by lifting the lever on the
valve to ensure water is relieved to waste
through the relief drain pipe. Lower lever
gently and check that it closes correctly.
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Expansion
Isolating Valve
Plumbing Connections
Cold Water Connection
It is mandatory to t the following items
between the supply main and the
RP¾"/20mm socket in the water heater.
• an isolating valve
• a non return valve
• a line strainer
• a union
All ttings must be approved by the
relevant Authority and in accordance to
the plumbing code.
(Spindle Vertical)
Cold Water
Inlet
Line
Strainer
Note: a combined isolating valve/nonreturn valve/line strainer may be used.
Expansion valve only required where local
regulations demand.
Valve
Union
Connection
Non-return
Valve
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 “OUTLET” socket on the tank.
Insulation of Pipes
All hot water pipes must be insulated
with UV stabilized insulation suitable
for solar working temperatures, e.g.
Armaex Insulation.
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, such as a tempering
valve, be tted to the hot water supply
to outlets used primarily for personal
hygiene.
Note: This water heater is supplied
with a tempering valve. Install the
valve according to the manufacturer’s
recommendations. Any adustments to
the valve should be made according to
the manufacturer’s recommendations.
The tempering valve should be checked
at regular intervals to ensure its
operation and settings remain correct.
6
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Specifications
Tank Alignment
Wall
Water
Heater
Hot
Water
Outlet
Cold
Water
Inlet
A B
See
Detail G
E
C
Detail G
Solar drain.
Plumb to
waste.
D
To solar
collector
Gas inlet
Return from
solar
collectors
F
See
Detail G
Front RHSLHS
Model
Number
DN15DS, DL15DS 112 1754 1541 215 750 617 1013 324
Note: Minor changes to specifications and materials may occur without notice. While these will not affect the
safety, reliability or performance of your Dux unit, they could impact on the installation procedures explained in
this manual – check with Dux on 1300 365 115 if you are uncertain about any aspect of installing this product.
H4096 4096 Rev. D
Approximate
Weight Empty
(kg)
Dimensions
(mm)
A B C D E F
Storage
Capacity
(L)
7
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
System Components
9
8
2
7
System Components
1 PTR valve 6 To drain pipe
2 Hot water outlet to house 7 Cold Water Inlet
3 Solar collector return 8 Cold water outlet to solar collector
4 Gas inlet 9 Automatic Air Vent Valve
5 To solar collector pipe
3
1
5
6
4
8
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
System Components
12
1
2
3
4
System Components
1 Burner unit 7 Backing plate
2 Fan 8 Diverter valve
3 Hotlogic controller 9 Solar drain pipe
4 Pump 10 Solar flow pipe (to collector)
5 Gas valve 11 Solar non return valve
6 Gas inlet pipe 12 PTR Valve (drain to waste)
5
11
7
8
9
10
6
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Installation of Collectors
Installer’s Guide
Full installation instructions for the
collectors are in the Installer’s Guide,
included inside the water heater’s carton.
Safety
Do not commence an installation until
you have satised yourself that all safety
issues associated with working on and
lifting components onto a roof have
been addressed.
Local Authority Regulations
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 conict, local
regulations must prevail.
Location of Solar Collectors
There are several factors to consider in
selecting the collector location site:
• For best performance, the collectors
need to face true north. Due to the
high solar energy levels experienced
in Australia, installations on angles
of up to 45° away from true
north should not have a major
effect on the annual solar output.
Consequently, installations up
to 45° away from true north
are acceptable. See Collector
Orientation Compass on page 11.
• 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.
• The collectors should be installed
with a minimum inclination of 10°
and a maximum inclination of
45°. See Collector Inclination Guide
on page 11.
• Careful site inspection is required to
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.
• 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.
• To optimise efciency, the collectors
should be as close as possible to
the storage tank.
• For best performance, the collectors
should be located no more than
20m from the storage tank.
• Ensure that the roof structure is
suitable to support the weight of
the collectors. The collectors weigh
approximately 40kg each when full.
10
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Collector Orientation Compass
Installation of Collectors
True North
NW NE
A
B
70° from
true north
45°
45°
C
Surface Plate
A. Dux preferred range
B. Industry accepted range
C. If orientations A or B are not practical, an additional collector can be
installed at the home owner’s discretion in range C (not required north
of Tropic of Capricorn)
Note: When establishing the correct Collector Orientation, please account
for the Magnetic Declination of your geographic location
Collector Inclination Guide
50° from
true north
C
EastWest
H4096 4096 Rev. D
True North
A
A = 500mm, or greater if roof allows
B = Between 10° and 45°
B
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Installation of Collectors
Collector Rail Kit
The Collector Rail Kit that comes
with this water heater is designed
for mounting the collectors to most
common Australian roof types.
All kits consist of specially designed
rails, clamps and bolts etc. that are used
to x the collectors to the roof structure.
With the exception of the copper tube
and roong bolts, these kits contain all
of the plumbing components required
to connect the collectors to the ground
mounted water heater.
Refer to the collector rail kit instructions
located in the rail kit box. The rail kit
instructions can also be obtained from
Dux on 1300 365 115.
Collector mounting rail
For installations requiring three
collectors, an additional Collector
Rail Kit is required as an extension to
increase the mounting capacity from
two to three collectors.
Roof Space
It is not advisable to install collectors
on roof spaces that are smaller than
described below:
• 2 collectors: 3m wide × 3m high
• 3 collectors: 4.5m wide × 3m high
Roof areas smaller than these minimum
measurements will make installation and
later service work difcult.
12
Collector mounting rail
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Plumbing Connections to
Collectors
Insulation
Irrespective of the pipe length, both
the solar ow and return lines must be
insulated with UV stabilized insulation
suitable for solar working temperatures,
e.g. Armaex DuoSolar/Solar insulation.
No Plastic Fittings
Only DR brass and copper pipes and
ttings must be used. 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.
Connections To The Collectors
Connect the sealing ttings to the four
outer connections on the collector array:
1. Fit a brass conetite compression
tting to the top left and bottom
right corners of the array.
a. Tighten the assembly taking
care not to twist the copper
pipes of the collector.
b. Ensure you use correctly sized
spanners.
4. Tighten the Automatic Air Vent
Valve. (Note: It must be in a vertical
position and at the highest position
on the collectors).
5. Finally, insert a brass conetite
compression tting to the lower left
collector socket.
The collector array is now completed
and ready for connection to the water
heater system.
2. Fit the Automatic Air Vent Valve into
the top RC
and hand tighten.
3. Fit the conetite cone and 4 way
union to the top right hand socket
of the collector array.
H4096 4096 Rev. D
3
⁄8" BSP tapered socket
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Plumbing Connections to
Collectors
To make the connection between the
solar collector array and the storage
tank, the following is required.
1. 2 × ½" (15 mm) copper pipes, run
from the collector array down to
storage tank.
Note: Pipes must be insulated with
UV stabilized insulation suitable for
solar working temperatures, e.g.
Armaex DuoSolar/Solar insulation.
2. 1 × 20m collector sensor cable
run from the collector array to the
storage tank.
To complete this connection:
1. Connect one ½" insulated copper
tube to the conetite compression
tting at the bottom left hand corner
of the array and run down to the
ground mounted storage tank
location.
2. Connect the second ½" insulated
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.
Note: Care must be taken to ensure
that all roof penetrations are sealed to
prevent leaks and to comply with all
local regulations.
14
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Gas Connection
Refer to the Data Label for correct gas
type.
Maximum Gas Consumption
Maximum gas consumption of the water
is shown in the table below.
Gas Pipe Sizes
Gas pipe sizes must comply with
AS5601/AG601.
The gas inlet sizes are shown below:
Model No.
Max. Gas
Consumption
Gas Pipe
Size
DN15DS 45 MJ/h* R½"/15mm
DL15DS 45 MJ/h* R½"/15mm
*
±5%
Gas piping should be connected to
the provided female tting (see gure
below).
A union connection should be used.
Gas inlet
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Electrical Connections
Electrical Connection
Covers providing access to live electrical
parts 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 any electrical cover is removed.
This water heater is designed for
connection to CONTINUOUS TARIFF
for the Solar-Gas Module.
The electrical connection must comply
with Local Supply Authority Regulations
and AS3000.
Note: All electrical work must comply
with local regulations and be conducted
by a licensed electrician.
Note: The water heater is tted with a
over-temperature Energy Cut-Out (ECO).
Under no circumstances should the
water heater be operated without this
device being in the circuit. Replacement
must be carried out only by a qualied
electrician or the manufacturer.
Danger: The operation of the thermal
cut-out indicates a possibly dangerous
situation.
Power Failure
In case of power failure, the unit will
restart automatically once power is
restored.
Temperature Sensor Connection
1. Insert the collector temperature
sensor into the temperature sensor
well of the 4 Way Union Assembly.
Fix in place using cable clip and
seal using a small amount of silicon
adhesive/sealant.
2. Run the cable to the storage tank.
(It is important that the sensor cable
DOES NOT contact the hot return
pipe).
3. Connect the collector temperature
sensor to the 20m extension using
quick connect, then connect the
other end of the 20m extension
to the Hotlogic cable using quick
connect. Secure the connections
using the thumb screws on the plug
ends.
Power Cables
Power cables should be routed away
from any hot water pipes. If this is not
practical, insulate the hot water pipes
to avoid direct contact with the power
cables.
If the power cable is damaged, it should
be replaced by a lead assembly available
only from Dux service agents.
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H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Hotlogic Connections
Hotlogic® Controller
The Hotlogic controller should be
plugged in to a weatherproof approved
All LEDs are
Bi Colour –
Green & Red
power outlet for 10amps, 230 to 250
volt, 50Hz supply.
Hotlogic Normal Operation Codes
Power LED Sensor LED Outputs LED Explanation
Green flash alternating with Red flash Off System initialisation on power up (8 secs)
Green Green Flash (slow) N/A Heater in Frost Protection Mode
Green Green Flash (fast) N/A Heater in Over Temperature Mode
Green Green Green Boosting with gas or boosting wth solar
Green Green Off Boosting not required
Hotlogic Diagnosis Codes
Power LED Sensor LED Outputs LED Explanation
Off Off Off Power Off
Red Flash Off Off Hotlogic Controller Error
Green N/A Red Flash Control Output Error – Valve or Burner
Green N/A Red Gas Burner Lockout Error
Green Red Flash (once) N/A Sensor 1 Error – Burner Sensor
Green Red Flash (twice) N/A Sensor 2 Error – Tank Sensor Bottom
Green Red Flash (3 times ) N/A Sensor 3 Error – Tank Sensor Top
Green Red Flash (4 times) N/A Sensor 4 Error – Tank Sensor Middle
Green Red Flash (5 times) N/A Sensor 5 Error – Ambient Sensor
Green Red Flash (6 times) N/A Sensor 6 Error – Collector Sensor
Flash Sequence Definition: If 2 sensor errors occur at the same time, the higher number flash will show first
† This is caused when the system fails to ignite. It may be caused by low/no gas supply. Turn power off, then on. If fault
recurrs, please contact Dux.
Outputs LED
Sensors LED
Power LED
†
1
2
3
4
5
6
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Owner’s Information
Safety
This appliance 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 appliance by a person
responsible for their safety.
Children and animals should be
supervised to ensure that they do not
interfere with the appliance.
Water Quality
Your water heater has been
manufactured to suit all water conditions
of Australian metropolitan supplies.
Water can also be very corrosive,
measured by the saturation index. If the
water saturation index is greater than
0.40 an expansion control valve should
be tted.
Flammable Materials
It is essential for the safe operation of
this gas heater that clothing or any other
ammable material should not be placed
against or on top of the water heater.
In addition, do not store ammable or
corrosive materials, such as dry cleaning
uids, pool chemicals, etc., in close
proximity to the heater.
The use of aerosol sprays in the vicinity
of the heater should be avoided. The
propellant gases used in these devices,
e.g. y-spray, hair-spray and laundry
aids, can break down in the ames of the
burner and produce corrosive agents.
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H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Owner’s Information
What Should I Do During Holidays?
The system’s temperature protection
features can monitor and control the
solar collector temperature while you are
away, so please do not turn electrical
power off to the system.
Warning: If the hot water system is
not used for two weeks or more, a
quantity of hydrogen gas, which is highly
ammable, may accumulate in the water
heater. 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 an unusual noise similar
to air escaping.
Important: There are no user
serviceable components in the
system. Only an authorised service
representative is permitted to remove
any covers or make setting adjustments.
Do not open or adjust any electrical
covers or devices yourself.
How Long Will The Heater Run
Each Day?
The length of time that the solar heater
will run each day will vary dependent
upon the amount of hot water being used
by the household and the availability of
sunlight to heat the solar collectors.
Caution: All water heaters have
the ability to produce hot water in a
surprisingly short time. To reduce the
risk of scald injury, it is mandatory under
the requirements of AS/NZS 3500.4
that an approved temperature control
valve, such as a tempering valve, be
tted to the hot water supply pipe work.
This valve should be checked at regular
intervals to ensure its operation and
settings remain correct.
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Owner’s Information
Solar Collector Shading
Trees or buildings can shade the solar
collectors. Similarly, dirt can build
up on the glass cover. If this occurs,
trees should be trimmed back or the
system relocated. If the glass is dirty,
it should be cleaned with a domestic
glass cleaner – by an authorised
tradesperson.
How Does My System Work?
The main components of your solar
water heater are the water storage tank,
the solar collector(s), and the solar gas
module. The Dux water storage tank is
used to store the heated water ready
for household use. It is a specic Solar
Dux 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.
What Does The Circulation Pump
Do In The System?
The circulation pump is 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 circulate water in the solar circuit.
The system has two non-return valves
to prevent solar energy from reverse
cycling back through the storage tank to
the collectors at night.
The Hotlogic controller used to control
the circulation pump has a complex set
of activities. It is the brain of the system
and ensures optimum system efciency
and safety. The basic functions are:
1. Detecting availability of useful solar
energy in the solar collectors.
When the temperature of the solar
collector is 10°C higher than the
storage tank temperature, the
circulation pump is initiated. If the
difference in temperature falls to
less than 2°C, the circulation pump
is stopped.
2. Controlling maximum storage tank
temperature. If the storage tank
temperature reaches 85°C, the
circulation pump is stopped to
prevent excessive temperatures in
the storage tank.
20
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Owner’s Information
Gas Boosting System
The gas boosting system (connected
to continuous gas supply) is used to
heat part of the stored water on those
occasions when there is reduced solar
energy available. e.g. cloudy days.
This system is thermostatically
controlled, so it delivers only the energy
required, then automatically turns off.
Never turn the gas supply off during
normal use.
Under normal operating conditions, the
water within the storage tank is heated
by the solar collectors.
The circulating pump draws cold water
from 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 top
(hot section) of the storage tank, ready
for use.
The Solar-Gas Module
Hotlogic provides the ultimate protection
against all temperature extremes.
Freeze Protection
Hotlogic recognises ambient
temperatures approaching freezing
conditions and decides when to remove
the water from the solar collector.
When ambient conditions improve,
Hotlogic decides when to re-ll the
collectors.
Hot Temperature Protection
The water in the solar collectors can
reach dangerously high temperatures.
When the tank approaches its thermal
maximum (maximum energy storage
limit), Hotlogic decides when to remove
the remaining water in the solar collectors to protect the complete system
from steaming, expansion and overpressure issues.
H4096 4096 Rev. D
Hotlogic continually monitors the water
heater and rells the solar capture system when required.
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
System Maintenance
This water heater is designed such that
there is little to do regarding system
maintenance other than that detailed in
this Owner’s Manual. The components
in the solar side of the system do not
require maintenance.
Personally inspecting or servicing any
part of the system is not recommended.
Should you decide to personally inspect
the roof mounted system components,
it is essential that you use all safety
devices required to ensure your safety.
After each 5 years of operation, you
should contact the local service agent
to replace all safety valves and anodes
to ensure continued system life and
operational safety. In locations where
the water has a TDS greater than 600
ppm, this service is recommended each
3 years.
Six Monthly Service – By Owner
Open the PTR Valve for approximately
10 seconds by lifting the lever on the
valve to ensure water is relieved to waste
through the relief drain pipe. Lower lever
gently and check that it closes correctly.
Five Year Service – By Authorised
Personnel Only
The ve year service must be carried
out by a licensed tradesperson. It is
recommended that this service be
carried out by your local Dux agent.
The service should include the following:
• Replace the Pressure &
Temperature Relief Valve.
• Replace the anodes (in areas of
harsh or adverse water conditions, a
more frequent check of the anodes
is recommended).
• Cleaning of collectors to improve
solar collection.
• Flush the water heater by doing the
following:
i. Turn off the power.
ii. Turn off the cold water supply to
the water heater at the isolating
valve.
iii. Gently operate the easing lever
on the Pressure & Temperature
Relief Valve to release the
pressure in the water heater.
iv. Disconnect the cold water inlet
union to the heater and attach a
drain hose.
v. Gently operate the Pressure &
Temperature Relief Valve to let air
into the heater and allow water
to escape through the hose.
vi. Flush the heater until clear water
appears then reconnect all
ttings, ll the heater and restore
the electricity supply.
Draining the Water Heater
To drain the water heater, follow steps i
to v above until no more water escapes
from the appliance.
22
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Troubleshooting
What Should I Check Before
Making A Service Call?
If there is not enough hot water, it is
recommended that the following points
be considered before making a service
call. If after checking the following points
the problem has not been identied,
please contact Dux on 1300 365 115.
No Hot Water
• Is the Pressure & Temperature Relief
Valve discharging too much water?
• The total hot water usage of
showers, washing machines and
dishwashers can often be underestimated. Review these appliances
to determine if your daily usage is
greater than the storage volume of
your water heater.
• For example, if you have a 315 litre
storage tank and you are using 450
litres of water, it is possible that
there will be certain times of the day
where there is insufcient hot water.
Sizing details are available from your
Dux supplier.
may nd that the tank has not fully
recovered from a period of heavy
usage the previous evening.
• Inspect tap washers etc. for leakage
and replace if necessary.
• Is there a leaking hot water pipe or
dripping hot water tap? A small leak
can waste a large quantity of hot
water. Have your plumber rectify any
leaking pipe work.
• Check the shower ow rates with
a bucket, measuring the amount of
water used over that period of time.
If it is not possible to adjust shower
usage patterns, an inexpensive ow
control valve can easily be tted to
the shower outlet.
• Consider that during night time
heating, the time taken to heat
the tank can take longer, so you
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Troubleshooting
Water Discharge From Pressure &
Temperature Relief Valve (PTR)
It is not unusual for a small quantity of
water to discharge during the heating of
water in your storage tank. The amount
of discharge will depend on hot water
usage and size of the storage tank.
As a guide, it will discharge 3% of the
storage capacity of water in the heating
period.
Continuous Trickle (PTR)
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.
Steady Flow (PTR) – More than
20L per day
This may be caused by excessive water
supply pressure, a faulty PTR Valve or a
faulty thermostat. Turn off the electricity
supply and contact Dux
on 1300 365
115.
Water Discharge From Solar Drain
This is normal behaviour in freezing
conditions or when tank is at maximum
temperature.
Condensation in Collectors
In winter, or in times of heavy rain, water
vapour may form in the warm and humid
solar collectors, and then condense on
the inside surface of the cold glass.
As solar collectors are insulated for
optimum performance and have minimal
internal airow, condensation that has
formed during these times takes a
longer time to disperse but will do so
when enough direct sunlight has come
in contact with the collectors. The
warmer the sunlight, the faster it will
disperse.
Condensation in the collectors does not
affect the system’s performance.
24
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Warranty
Dux Hot Water Unit
Manufactured by Dux Manufacturing Limited (“Dux”)
Terms of Warranty and Replacement Guarantee
All Sunpro gas boosted solar water
heaters manufactured and sold after
1 January 2011 are backed by a
comprehensive one (1) year full parts
and labour warranty (conditions apply –
see below).
Furthermore, the Sunpro tank and solar
collectors include a guarantee to replace
your hot water unit if the inner cylinder
fails and your solar collector if it fails
within ve (5) years (conditions apply –
see below).
The terms of the Warranty and
replacement guarantee are set out
below.
1 Year Comprehensive Warranty
Your hot water system and its components (“Unit”) are covered by 1 year
(parts and labour) warranty against defective factory materials or workmanship.
This warranty period commences from
the date of installation of the Unit providing you have proof of this installation
date. Where the date of completion of
installation is not known or cannot be
proven, then this warranty will commence
one (1) month after the date of manufacture (refer to the data label on the unit).
5 Year Replacement Guarantee
If an inner cylinder or solar collector
fails on a Sunpro hot water unit within
a further four (4) years after the end of
the initial one (1) year warranty period,
Dux will provide a free replacement hot
water unit and/or solar collector at the
nearest approved Dux agent or Dux
ofce to the owner’s home. Under this
replacement guarantee, the transport,
installation and labour costs of delivering
the replacement hot water unit or solar
collector and removing and replacing the
existing hot water unit or solar collector
with the replacement hot water unit or
solar collector will be the responsibility of
the owner of the existing hot water unit.
Please note that Plumbing regulations
require that the replacement collector be
re-installed by a licensed Plumber.
Conditions of Warranty and Replacement Guarantee
The benets provided to you by the
warranty and replacement guarantee
(collectively “Warranty”) are in addition
to the guarantees and other rights and
remedies available to you under the
Australian Consumer Law (“ACL”).
If the Unit fails to conform to this
Warranty during the applicable period,
Dux will replace any failed component
or where necessary, in the absolute
discretion of Dux, replace the Unit free
of charge including reasonable labour
costs incurred in normal business
working hours.
H4096 4096 Rev. D
25
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Warranty
This Warranty only applies to defects
which have arisen solely from faulty
materials or workmanship in the Unit
and does not apply to other defects
which may have arisen as a result
of, without limitation, the following:
accidental damage, abuse, misuse,
maltreatment, abnormal stress or strain,
harsh or adverse water conditions
including excessive water pressure or
temperature, neglect of any kind or
otherwise as a result of any use of the
Unit contrary to the product manual
or other instructions provided by Dux.
Alterations or repair of the Unit other
than by an accredited and licensed
service agent or technician are not
covered. Attachment of accessories
or use of non genuine replacement
parts other than those manufactured
or approved by Dux are not covered by
this Warranty.
This Warranty applies only to the
Unit and does not cover any ancillary
plumbing or electrical parts supplied by
the installer such as pressure limiting
valve, tempering valve, line strainer,
stop cocks, non-return valve, electrical
switches, pumps or fuses, or faulty
installation.
The Unit must be installed by a licensed
plumber in accordance with information
set out in the Owner’s Manual and/
or Installer’s Guide supplied with the
Unit and/or any relevant statutory
requirements.
In addition to this Warranty, certain
legislation (including the ACL) may give
you rights which cannot be excluded,
restricted or modied. This Warranty
must be read subject to such legislation
and nothing in this Warranty has
the effect of excluding, restricting or
modifying those rights.
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 Unit;
• repair of the Unit;
• refunding the cost of the Unit;
• payment of reasonable costs of
having the Unit repaired;
• payment in respect of the reduced
value of the Unit.
Any defective part of the Unit must be
returned to the point of sale before
replacement can be considered under
the terms of this Warranty. If the costs
of returning any defective parts are
unreasonable, please contact Dux on
1300 365 115 (Australia) or 0800 729
389 (New Zealand) so that we can
arrange a collection if appropriate.
Warranty claims can be made at the
point of sale or by posting or faxing a
warranty claim to Dux (contact details
listed below) within one (1) month of the
appearance of a defect. Warranty claims
under this extended warranty must
26
H4096 4096 Rev. D
Page 29
Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Warranty
include the following details:
• Date of Purchase;
• Location of Purchase;
• Proof of Purchase;
• Date of Installation;
• Contact Details;
• Product Serial Number
Contact details
Dux’s contact details are as follows:
Business Address:
Dux Manufacturing Limited
Lackey Road
Moss Vale, NSW, 2577
Australia
Telephone:
1300 365 115 (Australia)
0800 729 389 (New Zealand)
Facsimile:
(61 2) 4868 0257
As required by legislation, including
under the ACL, any claims for damage
to furniture, carpets, walls, foundations
or any other consequential loss either
directly or indirectly due to defects
of any kind in a Unit will only be met
by Dux where the damage could be
considered reasonably foreseeable.
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 for 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.
Email:
Note: If the Unit is located in a position
that does not comply with the installation
instructions or relevant 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
Unit accessible for repair or replacement.
H4096 4096 Rev. D
27
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Other Information
Product Warranty is applicable only in Australia and New Zealand.
See page 25 for terms of warranty.
Privacy Act Amendment (2000): If and whenever warranty service is required, your personal
details will be given to an Authorised Dux Service Agent only for the express purpose
of carrying out the arranged warranty service work agreed by you the client and Dux
Manufacturing Limited.
Your Details
For future convenience, ll in the following details and retain with your original invoice for your
own records.
Surname:......................................Given Name(s):...................................................
Address:..................................................................................................................
Town/Suburb:..........................................................................................................
State/Territory:............................. Postcode:....................
Date of Purchase:.......................... Purchased From:............................................
Model:.................................. Serial Number (located on back cover):........................
Date of Manufacture:..............................................................................................
(Details on Data Label on water heater)
Installer’s Details:
Date of Installation:......................... Installer’s Name:.............................................
Address:..................................................................................................................
Installer’s Signature:...................................................................................
Service Details:
Date of Service:......................... Serviced By:..........................................................
Work Carried Out:......................................................................................................
..................................................................................................................................
..................................................................................................................................
Signature of Service Agent:........................................................................
28
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
H4096 4096 Rev. D
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Owner’s Manual – Pre Boosted Gas Solar Water Heater MP15
Pre Boosted Gas Solar Water Heater MP15
For advice, repairs and service, call:
1300 365 115 (Australia)
0800 729 389 (New Zealand)
Please Register Your Water Heater
Please take a moment to fill
out your details for warranty
registration at:
www.dux.com.au/warranty
or use your smartphone to scan this code:
This will ensure all your current details are
registered with us for prompt warranty
service if required.
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/maintenance
Serial Number
H4096 4096 Rev. D
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