Solahart 270HAV Technical Document

This water heater must be installed and serviced by a qualified person.
Please leave this guide with the householder.
270HAV
Air Sourced Heat Pump Water Heater
Owner’s Guide
and
Installation Instructions

An electronic copy of these Owner’s Guide and Installation Instructions can be downloaded from solahart.com.au.
PATENTS
This water heater may be protected by one or more patents or registered designs in the name of
Solahart Industries Pty Ltd or Rheem Australia Pty Ltd.
TRADE MARKS
®Registered trademark of Solahart Industries Pty Ltd or Rheem Australia Pty Ltd.
™ Trademark of Solahart Industries Pty Ltd or Rheem Australia Pty Ltd.
Note: Every care has been taken to ensure accuracy in preparation of this publication.
No liability can be accepted for any consequences, which may arise as a result of its application.

3
CONTENTS
HOUSEHOLDER
This booklet contains important information about your
new water heater, including terms of the Solahart warranty.
We recommend you read pages 7 to 35,
and the terms of the Solahart warranty on pages 4 to 6.
The other pages are intended for the installer but may be of interest.
Warranty....................................................................................................................................... 4
Safety, Warnings, Installation Notes......................................................................................... 7
About Your Water Heater.......................................................................................................... 10
Display Panel ............................................................................................................................. 14
Maintenance Requirements...................................................................................................... 29
Water Supplies........................................................................................................................... 30
Save A Service Call................................................................................................................... 33
Installation.................................................................................................................................. 36
Connections –Plumbing .......................................................................................................... 42
Connections –Electrical........................................................................................................... 45
Commissioning.......................................................................................................................... 47
Draining The Water Heater ....................................................................................................... 48
Solahart Installation Report ..................................................................................................... 49
Solahart Offices......................................................................................................................... 52

4
SOLAHART HEAT PUMP WATER HEATER WARRANTY
- AUSTRALIA ONLY -
HEAT PUMP WATER HEATER MODEL 270HAV
1. THE SOLAHART WARRANTY –GENERAL
1.1 This warranty is given by Solahart Industries Pty Limited ABN 45 064 945 848 of 1 Alan Street,
Rydalmere New South Wales.
1.2 Solahart offers national service through its Dealer network. Solahart will repair or replace components
at the address of the water heater subject to the terms of the Solahart warranty. Solahart, in addition
can provide preventative maintenance and advice on the operation of your water heater.
1.3 For details about this warranty, you can contact us on 1800 638 011.
1.4 The terms of this warranty and what is covered by it are set out in sections 2 and 3 and apply to water
heaters manufactured from the 1st June 2021.
1.5 If a subsequent version of this warranty is published, the terms of that warranty and what is covered by
it will apply to water heaters manufactured after the date specified in the subsequent version.
2. TERMS OF THE SOLAHART WARRANTY AND EXCLUSIONS TO IT
2.1 The decision of whether to repair or replace a faulty component is at Solahart’s sole discretion.
2.2 If you require a call out and we find that the fault is not covered by the Solahart warranty, you are
responsible for our standard call out charge. If you wish to have the relevant component repaired or
replaced by Solahart, that service will be at your cost.
2.3 Where a failed component or cylinder is replaced under this warranty, the balance of the original
warranty period will remain effective. The replacement does not carry a new Solahart warranty.
2.4 Where the water heater is installed outside the boundaries of a metropolitan area as defined by Solahart
or further than 30 km from a regional Solahart Dealer, the cost of transport, insurance and travelling
between the nearest Solahart Dealer’s premises and the installed site shall be the owner’s responsibility.
2.5 Where the water heater is installed in a position that does not allow safe or ready access, the cost of
that access, including the cost of additional materials handling and/or safety equipment, shall be the
owner’s responsibility. In other words, the cost of dismantling or removing cupboards, doors or walls
and the cost of any special equipment to bring the water heater to floor or ground level or to a serviceable
position is not covered by this warranty.
2.6 This warranty only applies to the original and genuine Solahart water heater in its original installed
location and any genuine Solahart replacement parts.
2.7 The Solahart warranty does not cover faults that are a result of:
a) Accidental damage to the water heater or any component (for example: (i) Acts of God such as
floods, storms, fires, lightning strikes and the like; and (ii) third party acts or omissions).
b) Misuse or abnormal use of the water heater.
c) Installation not in accordance with the Owner’s Guide and Installation Instructions or with relevant
statutory and local requirements in the State or Territory in which the water heater is installed.
d) Connection at any time to a water supply that does not comply with the water supply guidelines as
outlined in the Owner’s Guide and Installation Instructions.
e) Repairs, attempts to repair or modifications to the water heater by a person other than Solahart
Dealer or a Solahart Accredited Service Agent.
f) Faulty plumbing or faulty power supply.

SOLAHART HEAT PUMP WATER HEATER WARRANTY
- AUSTRALIA ONLY -
5
HEAT PUMP WATER HEATER MODEL 270HAV
g) Failure to maintain the water heater in accordance with the Owner's Guide and Installation
Instructions.
h) Transport damage.
i) Fair wear and tear from adverse conditions (for example, corrosion).
j) Cosmetic defects.
k) Ice formation in the waterways of a water heater system incorporating a freeze protection system
where the electricity supply has been switched off or has failed.
2.8 Solahart may reject a claim under this warranty in its sole discretion if a third party solar diverter is
connected to the water heater.
2.9 Subject to any statutory provisions to the contrary, this warranty excludes any and all claims for damage
to furniture, carpet, walls, foundations or any other consequential loss either directly or indirectly due to
leakage from the water heater, or due to leakage from fittings and/ or pipe work of metal, plastic or other
materials caused by water temperature, workmanship or other modes of failure.
2.10 If the water heater is not sized to supply the hot water demand in accordance with the guidelines in the
Solahart water heater literature, any resultant fault will not be covered by the Solahart warranty.
3. WHAT IS COVERED BY THE SOLAHART WARRANTY
FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT
3.1 Solahart will repair or replace a faulty component of your water heater if it fails to operate in accordance
with its specifications as follows:
What components are
covered
The period from the date of
installation in which the
fault must appear in order to
be covered
What coverage you receive
270HAV model
All components
(all installations)
Year 1
Repair and/or replacement of the faulty
component, free of charge, including labour.
All components
(if the water heater is installed
in a single-family
domestic dwelling)
Year 2
Repair and/or replacement of the faulty
component, free of charge, including labour.
Sealed System*components
(if the water heater is installed
in a single-family
domestic dwelling)
Year 3
Repair and/or replacement of the faulty
component, free of charge, including labour.
The cylinder
(if the water heater is installed
in a single-family
domestic dwelling)
Year 3
Repair and / or replacement of the cylinder,
free of charge, including labour.
Years 4 to 7
Replacement cylinder, free of charge.
Installation and repair labour costs are the
responsibility of the owner.
The cylinder
(if the water heater is not
installed in a single-family
domestic dwelling)
Years 2 & 3
Replacement cylinder, free of charge.
Installation and repair labour costs are the
responsibility of the owner.
* The Sealed System includes components that carry refrigerant only, e.g. Compressor, Condenser, TX Valve,
Receiver / Drier, Evaporator and associated pipe work.

SOLAHART HEAT PUMP WATER HEATER WARRANTY
- AUSTRALIA ONLY -
6
HEAT PUMP WATER HEATER MODEL 270HAV
4. ENTITLEMENT TO MAKE A CLAIM UNDER THIS WARRANTY
4.1 To be entitled to make a claim under this warranty you need to:
a) Be the owner of the water heater or have consent of the owner to act on their behalf
b) Contact Solahart without undue delay after detection of the defect and, in any event, within the
applicable warranty period.
4.2 You are not entitled to make a claim under this warranty if your water heater:
a) Does not have its original serial numbers or rating labels.
b) Is not installed in Australia.
5. HOW TO MAKE A CLAIM UNDER THIS WARRANTY
5.1 If you wish to make a claim under this warranty, you need to:
a) Contact Solahart on 1800 638 011 and provide owner’s details, address of the water heater, a
contact number and date of installation of the water heater or if that’s unavailable, the date of
manufacture and serial number (from the rating label on the water heater).
b) Solahart will arrange for the water heater to be tested and assessed on-site.
c) If Solahart determines that you have a valid warranty claim, Solahart will repair or replace the water
heater in accordance with this warranty.
5.2 Any expenses incurred in the making of a claim under this warranty will be borne by you.
6. THE AUSTRALIAN CONSUMER LAW
6.1 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.
6.2 The Solahart warranty (set out above) is in addition to any rights and remedies that you may have under
the Australian Consumer Law.

7
SAFETY, WARNINGS, INSTALLATION NOTES
It is important you read the following safety and warnings information.
SAFETY AND WARNINGS
•This water heater is only intended to be operated by persons who have the experience or the knowledge
and the capabilities to do so.
•This water heater is not intended to be operated by persons with reduced physical, sensory or mental
capabilities i.e. the infirm, or by children. Children should be supervised to ensure they do not interfere
with the water heater.
•If the electrical supply conduit to the water heater is damaged, it must be replaced by a qualified person
in order to avoid a hazard. Phone your nearest Solahart Dealer to arrange for an inspection.
•This water heater uses 220 V - 240 V a.c. electrical power for operation of the control systems and the
electrically operated components. The removal of the access covers will expose 220 V - 240 V a.c. wiring.
They must only be removed by a qualified person.
•This water heater is supplied with an electronic thermostat, an over-temperature energy cut-out and a
combination temperature pressure relief valve. These devices must not be tampered with or removed.
The water heater must not be operated unless each of these devices is fitted and is in working order.
The Solahart warranty may not cover faults if relief valves or other safety devices are tampered
with or if the installation is not in accordance with these instructions.
•DANGER: The operation of the over-temperature cut-out on the thermostat indicates a possibly
dangerous situation. If the over-temperature cut-out operates, it must not be reset and the water heater
must be serviced by a qualified person.
•The heat pump will operate until a water temperature of 60°C is reached. If the ambient air temperature
is outside of the heat pump’s operating range and heating of water is required, an electric heating unit will
heat the water temperature to 60°C.
Refer to “How Hot Should The Water Be?” on page 11 and to “Electric Boosting” on page 10.
•The lever on the temperature pressure relief valve and expansion control valve (if fitted) requires to be
operated every six (6) months to clear any deposits and to ensure the valve and its drain line are not
blocked.
Refer to “Relief Valves” on page 8 and “Minor Maintenance Every Six Months” on page 29.
•For continued safety of this water heater it must be installed, operated and maintained in accordance with
the Owner’s Guide and Installation Instructions.
•Servicing of the water heater must only be carried out by qualified personnel. Phone your nearest Solahart
Dealer.
•Only a person qualified to install or service a water heater can drain the water heater, if this is required.
•Do not modify this water heater.
•In areas where there is a risk of freezing conditions, power must be available to the water heater at all
times and the electrical supply to the water heater should not be switched off, otherwise damage could
result (refer to “Freeze Protection” on page 10 and to “To Turn Off The Water Heater” on page 12).
•Do not use aerosols, stain removers and household chemicals in the vicinity of this water heater while
it is in operation. Gases from some aerosol sprays, stain removers and household chemicals are corrosive
to the materials used in the heat pump system.
•Do not store swimming pool chemicals, household cleaners, etc., near the water heater.
•Ensure the air flow, air inlet louvres and outlet grille are not obstructed in any way at any time.

SAFETY, WARNINGS, INSTALLATION NOTES
8
RELIEF VALVES
Temperature Pressure Relief Valve
This water heater incorporates a temperature pressure relief valve
located near the top of the water heater. This valve is essential for the
water heater’s safe operation.
It is possible for the valve to discharge a quantity of water through the
drain line during each heating period. This quantity should be equal
to approximately 1/50 of the hot water used, as water expands by this
volume when heated.
Expansion Control Valve
In many areas, including South Australia, Western Australia and
scaling water areas, it is mandatory an expansion control valve is
fitted to the cold water line to the water heater.
The expansion control valve will discharge the quantity of water from
its drain line during the heating period instead of the temperature
pressure relief valve as it has a lower pressure rating.
Valve Operation
Continuous leakage of water from either valve and its drain line may
indicate a problem with the water heater. Refer to “Temperature
Pressure Relief Valve or Expansion Control Valve Running” on
page 34.
Warning: Never block the outlet of either valve or their drain lines
for any reason. A relief valve drain must be left open to atmosphere,
and be installed in a continuously downward direction.
In locations where water pipes are prone to freezing, the relief valve
drain line must be insulated and not exceed 300 mm in length before
discharging into a tundish through an air gap.
Operate the easing lever on the temperature pressure relief valve and expansion control valve once every
six (6) months to clear any deposits and ensure the valve and its drain line are not blocked. It is very important
the lever is raised and lowered gently. Refer to “Minor Maintenance Every Six Months” on page 29.
Warning: Water discharged from the temperature pressure relief valve drain line will be hot. Exercise care
to avoid any splashing of water by standing clear of the drain line’s point of discharge when operating either
valve’s easing lever.
DANGER: Failure to operate the easing lever on the relief valve once every six (6) months may result in
the water heater cylinder failing, or under certain circumstances, exploding.
If water does not flow freely from the drain line when the lever is lifted, then the water heater must be checked.
Phone your nearest Solahart Dealer to arrange for an inspection.
The temperature pressure relief valve should be replaced at intervals not exceeding five (5) years and the
expansion control valve should be checked for performance or replaced at intervals not exceeding
five (5) years. The checking of the valves performance or replacement should occur more frequently in areas
where there is a high incidence of water deposits. Refer to “Water Supplies” on page 30.
outlet /
drain
line
lift until water
flows from the
drain line –
lower gently

SAFETY, WARNINGS, INSTALLATION NOTES
9
INSTALLATION NOTES
This water heater must be installed:
•by a qualified person,
•in accordance with the installation instructions,
•in compliance with the Plumbing Code of Australia (PCA) and Plumbing Standard AS/NZS 3500.4,
▪This water heater is designed for outdoor installation only.
▪This water heater is intended to be permanently connected to the water mains and not connected by
a hose-set. A braided flexible hose or semi-flexible connector may be used for connection to the water
heater, where permitted by AS/NZS 3500.4.
▪Refer to dimensions diagram on page 41 for clearance requirements to provide adequate ventilation
for the heat pump module.
•in compliance with the Australian / New Zealand Wiring Rules AS/NZS 3000,
▪Isolation switches must be installed in the electrical circuit to the water heater in accordance with the
Wiring Rules, so the water heater can be switched off.
▪The water heater must be directly connected to the mains power supply.
▪The power supply wires are to be directly connected to the terminal block and earth tab connection,
with no excess wire loops inside the front cover. The temperature rating of the power supply wires
insulation must suit this application, or the wiring protected by insulating sleeving with an appropriate
temperature rating if it can make contact with the internal storage cylinder. The temperature of the
internal storage cylinder can reach 60°C under normal operation.
•in compliance with all local codes and regulatory authority requirements.
Installation and commissioning requirements and details for the installing plumber and licensed electrical
worker are contained on pages 36 to 48.
Mains pressure water supply
The water heater is designed to operate at mains pressure by connecting directly to the mains water supply.
The water heater is supplied with a temperature pressure relief valve with a pressure rating of 1000 kPa. If an
expansion control valve has been installed on the cold water line to the water heater, this should have a
pressure rating of 850 kPa.
The maximum mains water supply pressure for the water heater is 800 kPa if an expansion control valve is
not installed, or 680 kPa if an expansion control valve is installed. If the mains supply pressure in your area
exceeds these values, a pressure limiting valve must be installed.
The supply pressure should be greater than 350 kPa for true mains pressure operation to be achieved.

10
ABOUT YOUR WATER HEATER
WATER HEATER APPLICATION
This water heater is designed for use in a single family domestic dwelling for the purpose of heating potable
water. Its use in an application other than this may shorten its life.
MODEL TYPE
Your Solahart®air sourced heat pump water heater is designed for outdoor installation only. The model you
have chosen is the 270HAV and is recommended for connection to either a 24 hour continuous tariff or an
extended off-peak (minimum 16 hours per day –replacement model and climate dependant) power supply.
A Solahart heat pump water heater consumes less energy than an electric water heater. The impact on an
electricity account will depend on the tariff arrangement of the water heater replaced and where you live.
Contact your energy provider for more information on tariff arrangements and cost comparisons.
The Solahart air sourced heat pump water heater has a vitreous enamel lined steel cylinder. The water heater’s
evaporator absorbs heat from the surrounding air and transfers this heat into the water.
When hot water is drawn off and cold water enters the tank, a sensor activates a fan, a compressor and the
heat pump control system. The fan draws outside air in through the air inlet louvres at the top of the water
heater. Heat is absorbed from the air by an evaporator and transferred into the water through a heat exchanger
wrapped around the water heater cylinder. The resulting cold air is then discharged through the air outlet
louvres back to atmosphere. This process continues while ever heating is required untilthe water in the storage
tank reaches a temperature of 60°C.
Even on cloudy or cold days, heat is drawn from the surrounding air. The heat
pump will operate when the ambient air temperature is from -5°C to 43°C. The
electric heating unit will operate when the ambient air temperature falls below
-5°C or rises above 43°C if heating is required. The efficiency of the water
heater increases as the surrounding ambient air temperature increases.
Automatic safety controls are fitted to the water heater to provide safe and
efficient operation.
ELECTRIC BOOSTING
Ice may begin to form on the evaporator reducing the heat pump efficiency,
when the ambient air temperature falls below 7°C and the heat pump has been
operating for an extended period. If the heat pump operates between -5°C and
7°C for longer than 3 hours 20 minutes, the electric heating unit will turn on to
assist in the heating of the water. At ambient air temperatures below -5°C, the
water heater deactivates the heat pump operation and switches to the electric
heating unit. During these periods the evaporator will defrost if necessary.
When operating at a temperature outside of the heat pump’s operating range, the heated water capacity is
195 litres. The water will be heated to a temperature of 60°C by the electric heating unit if heating is required.
The temperature setting of the sensor controlling the electric heating unit is not adjustable and is set at 60°C.
FREEZE PROTECTION
The water heater has an active de-frost function so the heat pump operates automatically to remove ice from
its evaporator coil when the ambient air temperature is between -5 °C and 7°C.
The water heater also has a freeze protection function built in for extremely cold conditions. When the water
heater is placed into Vacation Mode at the Display Panel and power supply is available to the water heater,
either the heat pumpoperates or the electric heating unit is used to maintain a minimum tank water temperature
above 10°C.
The water heater has NO WARRANTY for freeze damage if power is unavailable at the water heater.
Warning: In areas where the ambient air temperature may fall below 4°C, power must be available to the
water heater at all times.

ABOUT YOUR WATER HEATER
11
HOW HOT SHOULD THE WATER BE?
The system controls (compressor, evaporator and fan) will operate
until a water temperature of approximately 60°C is reached. If the
ambient air temperature is outside of the heat pump’s operating
range, the water temperature is boosted automatically to 60°C by the
electric heating unit, if heating is required.
To meet the requirements of the National Plumbing Standard the
temperature of the stored water must not be below 60°C.
HOTTER WATER INCREASES THE RISK OF SCALD INJURY
This water heater can deliver hot water at temperatures up to 60°C,
sufficiently hot to cause severe scalding. Water at this temperature
may have been plumbed to fixtures where water hotter than 50°C is
allowed, such as the kitchen and laundry.
Check the water temperature before use, such as when entering a
shower or filling a bath or basin, to ensure it is suitable for the
application and will not cause scald injury.
We recommend and it may also be required by regulations that an approved temperature limiting device be
fitted into the hot water pipe work to the bathroom and ensuite when this water heater is installed. This will
keep the water temperature below 50°C at the bathroom and ensuite. The risk of scald injury will be reduced
and still allow hotter water to the kitchen and laundry.
TEMPERATURE ADJUSTMENT
The thermostat and sensors controlling the heat pump and the electric heating unit are factory set and not
adjustable.
DISPLAY PANEL AND USER CONTROLLED FUNCTIONS
The water heater has a display panel to indicate the status of the water heater. The Display Panel also allows
the user to select certain settings, such as Timer Control, Vacation Mode and Manual Electric Heating. Refer
to “Display Panel” on page 14.
TIMER CONTROL
A timer function on the Display Panel allows the hours of operation of the water heater to be set. Refer to
“Timer” on page 21.
It may be desirable for the water heater not to operate between certain hours, such as during the peak period
when connected to a Time of Use electricity supply due to a more expensive tariff rate applying.
A timer will affect the operating times of both the heat pump circuit and the electric heating unit.
Notes
•The 270HAV model water heater is recommended for connection to either a 24 hour continuous tariff or
an extended off-peak (minimum 16 hours per day –replacement model and climate dependant) power
supply.
•If there is a risk of freezing conditions, the electrical supply to the water heater should not be switched off,
otherwise damage could result (refer to “Freeze Protection” on page 10).
PRECAUTIONS
The water heater must be maintained in accordance with the Owner’s Guide and Installation Instructions. Refer
to “Maintenance Requirements” on page 29 and to “Anode Inspection and Replacement” on page 31.
If this water heater is to be used where an uninterrupted hot water supply is necessary for your application or
business you should ensure that you have back-up redundancy within the hot water system design. This should
ensure the continuity of hot water supply in the event that this water heater were to become inoperable for any
reason. We recommend you seek advice from your plumber or specifier about your needs and building back-
up redundancy into your hot water supply system.
maximum temperature from
heat pump operation and
electric heating unit
operation;
minimum recommended
stored water temperature
maximum recommended
supply temperature to
bathrooms and ensuites

ABOUT YOUR WATER HEATER
12
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater:
•Switch off the electrical supply at the water heater isolating switch on the switchboard or at the isolating
switch at the water heater.
•Close the cold water isolation valve at the inlet to the water heater.
Note: If there is a risk of freezing conditions, the electrical supply to the water heater should not be switched
off, otherwise damage could result (refer to “Freeze Protection” on page 10).
TO TURN ON THE WATER HEATER
•Open the cold water isolation valve fully on the cold water line to the water heater.
•Switch on the electrical supply at the water heater isolating switch on the switchboard and at the isolating
switch at the water heater.
•Check and if required reset the timer function on the Display Panel.
Note: When the electrical supply is switched on, there will be a knocking sound coming from the heat pump
for a short period of time. This is the electronic expansion valve operating. This is normal and not a fault with
the heat pump.
HEAT PUMP OPERATION
The heat pump may take up to 5 minutes to commence operating when the power supply is switched on. The
heat pump will only operate when:
•power is available at the water heater, and
•the water in the storage tank requires heating, and
•the water temperature in the lower part of the water heater is 39°C or less.
If the ambient air temperature is below -5°C or above 43°C and the system calls for heating, the heat pump
will not operate, and the electric heating unit will operate instead.
When the heat pump is operating, the system may switch to the electric heating unit if it detects that the
ambient air temperature is below the minimum operating temperature of -5°C or above the maximum operating
temperature of 43°C. It may also switch back to heat pump operation from the electric heating unit if it detects
the ambient air temperature has moved back to within the heat pump’s operating temperature range.
Note: The heat pump may not turn on after having just completed a heating cycle and more hot water is drawn
from the water heater, or whilst the heat pump was operating and either power was switched off or it was
turned “Off” at the Display Panel. The heat pump will wait at least 3 minutes before operating and the conditions
for start-up are favourable.
GOING ON HOLIDAYS
If you plan to be away from home for a few nights, we suggest you leave the water heater switched on.
If you plan to be away for a longer period, you can conserve energy by placing the water heater into Vacation
Mode at the Display Panel. The heat pump and electric heating unit are prevented from operating under
standard heating conditions. The electrical supply remains available to the water heater. Refer to “Vacation
Mode” on page 24.
It is not advised to switch off the water heater at the isolating switch if there is the risk of freeze conditions.
Refer to “To Turn Off The Water Heater” on page 12.

ABOUT YOUR WATER HEATER
13
VICTORIAN CUSTOMERS
Notice to Victorian Customers from the Victorian Building Authority. 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 Certificate, showing that the work complies with all the
relevant Standards. Only a licensed person will have insurance protecting their workmanship for 6 years. Make
sure you use a licensed person to install this water heater and ask for your Compliance Certificate.
DOES THE WATER CHEMISTRY AFFECT THE WATER HEATER?
The water heater is suitable for most public water supplies, however some water chemistries may have
detrimental effects on the water heater, its components and fittings. Refer to “Water Supplies” on page 30.
If you are in a known harsh water area or you are not sure of your water chemistry, have your water checked
against the conditions described on pages 30 to 32.
HOW LONG WILL THE WATER HEATER LAST?
The water heater is supported by a manufacturer’s warranty (refer to page 4). There are a number of factors
that will affect the length of service the water heater will provide. These include but are not limited to the water
chemistry, the water pressure, the water temperature (inlet and outlet) and the water usage pattern. Refer to
“Precautions” on page 11.
ENVIRONMENT
At the end of the service life of the heat pump water heater and prior to the water heater being disposed of, a
person qualified to work with refrigerants must recover the refrigerant from within the sealed system. The
refrigerant must not be vented to atmosphere. Phone your nearest Solahart Dealer to arrange for an inspection.

14
DISPLAY PANEL
DISPLAY PANEL AND ICONS
The water heater has a Display Panel to allow the user to view the current operational status of the water
heater and to enable user input functionality.
Multiple blue and red LEDs on the Display Panel illuminate to display icons which provide information on the
water heater’s current operational status, water temperatures in the water heater, usable hot water quantity
available, timer function settings, the time and fault codes. The Display Panel also has Selection Keys to
enable the user to perform functions such as setting the timer and change between modes.
The Display icons and Selection Key icons are visible when the Display Panel cover is removed and the Display
Panel is illuminated.
A Selection Key icon illuminates blue when its function or mode is turned off and not in use. A Selection Key
icon illuminates red when its function or mode is turned on and is in use. Display icons illuminate blue when
they are in use.
•Refer to “Display Panel – Display Icons and Keypad Selection Key Icons” on page 16 to view the Display
and Selection Key icons which display on the Display Panel.
•Refer to “Illuminating the Display Panel” on page 16 for the procedure to illuminate the Display Panel.
•Refer to “Display and Keypad Selection Key Icons Explained” on page 17 for an explanation of each of
the icons.
•Refer to “Display When Electricity Supply is Turned On at the Isolating Switch” on page 15 for an overview
of the icons displayed when the electricity supply is switched on to the water heater.
DISPLAY PANEL COVER
The Display Panel has a cover to provide protection to the face of the Display Panel. The cover has to be
removed to access the Display Panel and view its display or access the user input and settings functions.
The Display Panel cover has magnets attached. When removed from covering the Display Panel, it can be
conveniently placed against the side of the water heater while the Display Panel is being viewed or accessed.
When accessing the Display Panel is complete, it is important to return the cover over the Display Panel to
protect the Display Panel.
FUNCTIONS AND MODES OF THE WATER HEATER
Clock Function
The water heater has a clock function to enable the time to be displayed. It is necessary to set the clock to use
the timer setting functions of the water heater. Refer to “Clock”on page 18.
Standard Heating Mode
Standard Heating Mode is the normal day to day operational mode of the heat pump. It is necessary for the
heat pump to be “On” at the Display Panel for the heat pump to operate and heat the water. Refer to “Standard
Heating Mode” on page 19.
Useable Water Quantity Display
The Display Panel features a Useable Water Quantity display icon. This icon indicates the quantity of usable
hot water in the water heater. Refer to “Useable Water Quantity Display” on page 20.
Water Temperature Display
The water temperatures in the upper part and lower part of the water heater display on the Display Panel
during certain operational configurations. Refer to “Water Temperature Display”on page 20.

DISPLAY PANEL
15
Timer
A Timer function enables two timed periods to be set in a 24 hour period. The Timer is used in conjunction
with the Standard Heating Mode to control the times of operation of the heat pump. Refer to “Timer”on
page 21.
Vacation Mode
Vacation Mode enables energy to be conserved during a set period, such as when away on holidays. The heat
pump and electric heating unit are prevented from operating under standard heating conditions. Refer to
“Vacation Mode”on page 24.
Locking the Display Panel
The Display Panel can be locked to prevent unauthorised or accidental adjustments being made. Refer to
“Locking the Display Panel”on page 27.
Fault Codes
In the event the water heater develops a fault, a code will display in the Main Display Area This function of the
water heater indicates to the user a service call is required. Refer to “Fault Codes” on page 27.
Manual Electric Heating Mode
The water heater has a Manual Electric Heating Mode which allows the electric heating unit to be manually
switched on to heat the water. This would be used in the event the heat pump develops a fault which prevents
the heat pump from operating and heating the water. This mode can be used to provide hot water prior to a
service call being made to correct the fault. Refer to “Manual Electric Heating Mode” on page 27.
DISPLAY WHEN ELECTRICITY SUPPLY IS TURNED ON AT THE ISOLATING SWITCH
Note: When the electrical supply is switched on, there will be a knocking sound coming from the heat pump
for a short period of time. This is the electronic expansion valve operating. This is normal and not a fault with
the heat pump.
When the electricity supply is switched on to the water heater at the water heater isolating switch:
•All icons on the display panel illuminate blue. After two (2) seconds the Selection Key icons illuminate red
for a further for two (2) seconds. Then all icons on the Display Panel go out.
•After a short initialisation period where a combination of icons illuminate;
◼‘OFF’ is displayed in the Main Display Area and the Display icons of previously set functions illuminate
blue in the upper part of the Display Panel, and
◼Selection Key icons of previously set functions illuminate red, and
◼Selection Key icons not in use illuminate blue in the lower part of the Display Panel.
•During this short period, inputs from pressing the Selection Keys are ignored by the water heater.
The water heater has a memory function. When the electricity supply is switched on to the water heater after
having been switched off, or if electricity is reinstated to the water heater after a time controlled electricity
supply period, previous settings including the time remain stored. The water heater and heat pump will return
to the programmed state at the time the electricity supply being interrupted.
It is necessary to turn the heat pump “On” at the Display Panel after the electricity supply is switched on to the
water heater at the water heater isolating switch for the first time. The heat pump must be “On” at the Display
Panel for the heat pump to operate and heat the water.
Note: After one (1) minute of Display Panel inactivity, the illuminated Display and Selection Key icons go out
and the Display Panel becomes blank.

DISPLAY PANEL
16
DISPLAY PANEL –DISPLAY ICONS AND KEYPAD SELECTION KEY ICONS
Illuminating the Display Panel
Press the “On / Off” key to illuminate the Display Panel.
•The Display icons of the current set functions and operational status of the water heater illuminate blue in
the upper part of the Display Panel.
•The Selection Key icons displaying the current operation and in use illuminate red.
•The Selection Key icons which are not currently in use illuminate blue.
Note: After one (1) minute of Display Panel inactivity, the illuminated Display and Selection Key icons go out
and the Display Panel becomes blank.

DISPLAY PANEL
17
Display and Keypad Selection Key Icons Explained
Icon Keys
Description
Useable Water Quantity Icon: displays quantity of usable hot water in the water
heater, illuminating blue.
The display ranges from the illumination of five bars, which indicates the water
heater is full of hot water, to no illumination of bars, which indicates the
temperature of all of the water in the water heater is below 35°C.
Key Lock Icon: illuminates blue when the Display Panel is locked
Fan Display Icon: illuminates blue when the heat pump and the fan are
operating.
Vacation Mode Display Icon: illuminates blue when Vacation Mode is on.
Temperature Icon: illuminates blue when the water temperature in the upper
part of the water heater is displayed in the Main Display Area.
Lower Tank Temperature Icon: illuminates blue when the water temperature in
the lower part of the water heater is displayed in the Time / Date Display Area.
Main Display Area: illuminates blue and displays the water temperature in the
upper part of the water heater or ‘OFF’ depending upon the operational status of
the water heater.
Celsius Icon: illuminates blue when the Main Display Area displays the water
temperature.
Timer Icons: each icon illuminates blue after;
the first and / or second Timer period is programmed, either ‘1’ or ‘2’ or both,
and a Timer or Vacation period is set, either ‘ON’ or ‘OFF’ or both.
Time / Date Display Area: illuminates blue and displays the time or date or
water temperature in the lower part of the water heater, depending upon the
operational status of the water heater.
Clock Key: used to set the clock and the timer settings. Illuminates red when
timer periods are set. Illuminates blue when no timer periods are set.
Vacation Mode Key: used to switch the Vacation Mode on and off. Illuminates
red when the mode is on and illuminates blue when the mode is off.
Manual Electric Heating Mode Key: used to switch the Manual Electric Heating
Mode On and Off. Illuminates red when the mode is on and illuminates blue when
the mode is off.
Timer Check Key: Illuminates blue and is used to check the timer settings.
Standard Heating Mode Key: used to switch the Standard Heating Mode on
and off. Illuminates red when the mode is on and illuminates blue when the mode
is off.
Up Arrow Key: used to increase variable values or move between displays.
On / Off Key:** used to switch the heat pump “On”or “Off”at the Display Panel.
Down Arrow Key: used to decrease variable values or move between displays.
** Note –On / Off Key: The On / Off key only turns the heat pump “Off” at the Display Panel. It does not switch
off or isolate the electricity supply to the water heater or Display Panel. If it is necessary to switch off the
electricity supply to the water heater, then this must be done at the water heater isolating switch on the
switchboard or at the isolating switch at the water heater.

DISPLAY PANEL
18
CLOCK
The water heater has a clock function. It is necessary to set the clock to use the timer setting functions of the
water heater. The clock can be set whether the heat pump is “On” or “Off” at the Display Panel.
The setting of the clock includes year, month, day, hour and minutes. Once the clock is set, the time in hours
and minutes is displayed in the Time / Date Display Area.
The clock is a 24 hour clock, i.e. if the time is 3:30PM, it will show as 15:30 on the clock.
If there is a period of inactivity of 10 seconds during the setting of the clock, the Display Panel exits the clock
programming and the display reverts to the time which has been set to that point.
•To set the clock
◼Press the “Clock” key.
The hour digits in the Time / Date Display Area commence to flash.
A colon separates the hour digits (on left) and minute digits (on right) on the display.
◼Press the "Up" key or "Down" key to select the hour digits.
◼Press the “Clock” key to save the hour digits.
The minute digits commence to flash.
◼Press the "Up" key or "Down" key to select the minute digits.
◼Press the “Clock” key to save the minute digits.
The month digits commence to flash.
(the months are represented numerically, i.e. 01 to 12)
A single dot separates the month digits (on left) and day digits (on right) on the display.
◼Press the "Up" key or "Down" key to select the month digits.
◼Press the “Clock” key to save the month digits.
The day digits commence to flash.
(The day is represented by the date within the month, i.e. 01 to 31)
◼Press the "Up" key or "Down" key to select the day digits.
◼Press the “Clock” key to save the day digits.
The month and day digits are replaced by four digits representing the year and commencing with 20.
The last two digits of the year commence to flash.
There is no colon or dot separating the first two digits and last two digits of the year on the display.
◼Press the "Up" key or "Down" key to select the year digits.
◼Press the “Clock” key to save the year digits.
The time is displayed in the Time / Date Display Area.
The clock is now set.

DISPLAY PANEL
19
STANDARD HEATING MODE
Standard Heating Mode is the normal day to day operational mode of the heat pump. The heat pump will
operate when heating of the water is required, and there is an electricity supply to the water heater, and the
heat pump is turned “On” at the Display Panel, and the water temperature in the bottom part of the water heater
is 39°C or lower. The heat pump must be “On” at the Display Panel for the heat pump to operate and heat the
water.
Standard Heating Mode must be turned on and the “Standard Heating” key illuminated red for the heat pump
to operate.
If the “Standard Heating” key is illuminated blue:
•Press the “Standard Heating” key.
The “Standard Heating” key illuminates red.
Standard Heating Mode has been turned on.
Timer periods can be set to control the hours of operation of the heat pump. Refer to “Timer” on page 21.
A set Timer period can be manually overridden. To override the Timer during a Timer ‘OFF’ period:
•Press and hold the “On / Off” key for 2 to 3 seconds to turn the heat pump “On” at the Display Panel.
The heat pump will remain “On” at the Display Panel until the end of the next Timer period.
If the electricity supply is switched off or is interrupted to the water heater whilst the heat pump is “On” at the
Display Panel, when the electricity is switched on or reconnected again, the heat pump will revert to “On” at
the Display Panel, unless the time is outside of a Timer 1 or Timer 2 set period. At the commencement of the
next Timer period the heat pump will automatically turn “On” at the Display Panel.
During normal day to day operation of the water heater, it is not necessary to turn the heat pump “Off” at the
Display Panel. It is necessary though to turn the heat pump “Off” at the Display Panel to complete or activate
particular user function settings. It is also necessary to then turn the heat pump back “On”at the Display Panel
after the completion of these user function settings.
TURNING THE HEAT PUMP “ON” OR “OFF” AT THE DISPLAY PANEL
•To turn the heat pump “On” at the Display Panel:
◼Press and hold the “On / Off”key for 2 to 3 seconds.
The ‘TEMP’ icon illuminates.
The water temperature in the upper part of the water heater illuminates in the Main Display Area.
The Useable Water Quantity icon bars illuminate (if the water is hot).
The Display icons of the current set functions illuminate blue.
The Selection Key icons displaying the current operation and in use illuminate red.
The Selection Key icons which are not currently in use illuminate blue.
•To turn the heat pump “Off” at the Display Panel:
◼Press and hold the “On / Off”key for 2 to 3 seconds.
The ‘TEMP’ icon, water temperature display and Useable Water Quantity icon bars go out.
‘OFF’illuminates in the Main Display Area.
The Display icons of the current set functions illuminate blue.
The Selection Key icons displaying the current operation and in use illuminate red.
The Selection Key icons which are not currently in use illuminate blue.
If the heat pump was operating, the fan may continue to run for up to one (1) minute.

DISPLAY PANEL
20
USEABLE WATER QUANTITY DISPLAY
The Display Panel features a Useable Water Quantity display icon. This icon indicates the quantity of usable
hot water in the water heater.
The display ranges from the illumination of five bars, which indicates the water heater is full of hot water, to no
illumination of bars, which indicates the temperature of the water in the water heater is below 35°C. The number
of bars is calculated from the water temperature in both the upper part and lower part of the water heater.
5 bars
temperature greater than 56°C
Note: Where an average water
temperature is shown in this table, the
actual water temperature may be hotter
in the upper part or cooler in the lower
part of the water heater, by up to 10°C
or even more on occasion, depending
upon the amount of hot water draw off
and the stage of heating by the heat
pump.
4 bars
average temperature 50°C
3 bars
average temperature 45°C
2 bars
average temperature 40°C
1 bar
average temperature 35°C
0 bars
temperature less than 35°C
WATER TEMPERATURE DISPLAY
The water temperatures in both the upper part and lower part of the water heater display on the Display Panel
when the heat pump is “On” at the Display Panel.
•Press the “On / Off” key to illuminate the Display Panel.
•If ‘OFF’ is displayed in the Main Display Area, press and hold the “On / Off” key for 2 to 3 seconds to turn
the heat pump “On” at the Display Panel.
•Upper Water Heater Temperature Display
The ‘TEMP’ icon illuminates.
The water temperature in the upper part of the water heater is displayed in the Main Display Area.
•Lower Water Heater Temperature Display
The temperature of the water in the lower part of the water heater is displayed in the Time / Date Display
Area for 10 seconds when the Display Panel illuminates after having been off.
The ‘DOWN’icon illuminates during this 10 second period.
The time will display after the 10 seconds has elapsed, or if the “On / Off”key is pressed within the
10 second period.
◼To view the water temperature in the lower part of the water heater at other times and when the heat
pump is “On” at the Display Panel:
➢Press and hold the “Down Arrow” key until the ‘DOWN’icon illuminates. This will take 2 seconds.
The water temperature in the lower part of the water heater displays in the Time / Date Display
Area for 10 seconds.
The ‘DOWN’icon and the temperature display will go out and the time will display after the
10 seconds has elapsed, or if the “On / Off”key is pressed within the 10 second period.