Solahart 250E5X Technical Document

This water heater must be installed and serviced by a qualified person.
Please leave this guide with the householder.
Electric 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 names of Solahart Industries Pty Ltd or Rheem Australia Pty Ltd.
TRADEMARKS
® Registered trademark of Solahart Industries Pty Ltd or Rheem Australia Pty Ltd.
TM Trademark of Solahart Industries Pty Ltd or Rheem Australia Pty Ltd.
Note: Every care has been taken to ensure the 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 23,
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
How Your Water Heater Works ................................................................................................ 10
About Your Water Heater.......................................................................................................... 13
Maintenance Requirements...................................................................................................... 16
Water Supplies........................................................................................................................... 18
Save A Service Call ................................................................................................................... 21
Installation.................................................................................................................................. 24
Connections –Plumbing .......................................................................................................... 31
Connections –Electrical........................................................................................................... 34
Commissioning.......................................................................................................................... 36
Draining The Water Heater ....................................................................................................... 38
Solahart Offices ......................................................................................................................... 40

4
SOLAHART POWERSTORE ELECTRIC
WATER HEATER WARRANTY - AUSTRALIA ONLY
ELECTRIC WATER HEATER MODEL 250E5X, 250E6X, 315E5X, 315E6X
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 December 2020.
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 Solahart may reject a claim under this warranty in its sole discretion if:
a) You do not arrange for a major service to be conducted on your water heater in the fifth year after
installation, in accordance with Solahart’s recommendation in the Owner’s Guide and Installation
Instructions; and
b) The fault giving rise to the warranty claim would have been detected and rectified during that major
service.
2.2 The decision of whether to repair or replace a faulty component is at Solahart’s sole discretion. Solahart
may use new, used, remanufactured or refurbished parts or products when repairing or replacing
products under this warranty.
2.3 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.
2.4 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.
2.5 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.
2.6 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.
2.7 This warranty only applies to the original and genuine Solahart water heater in its original installed
location and any genuine Solahart replacement parts.
2.8 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.

SOLAHART POWERSTORE ELECTRIC
WATER HEATER WARRANTY - AUSTRALIA ONLY
5
ELECTRIC WATER HEATER MODEL 250E5X, 250E6X, 315E5X, 315E6X
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 the Solahart
Dealer or a Solahart Accredited Service Agent.
f) Faulty plumbing or faulty power supply.
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.
2.9 Subject to any statutory provisions to the contrary, this warranty excludes any and all claims for:
a) 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, and
b) Loss or damage due to the water heater if it is not connected to or loses connectivity to the internet.
2.10 If the water heater is not sized to supply the hot water demand in accordance with the guidelines in
Solahart’s 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
250E5X, 250E6X, 315E5X, 315E6X models
All components
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)
Years 2 & 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)
Years 4 to 10
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.

SOLAHART POWERSTORE ELECTRIC
WATER HEATER WARRANTY - AUSTRALIA ONLY
6
ELECTRIC WATER HEATER MODEL 250E5X, 250E6X, 315E5X, 315E6X
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. REPAIR NOTICE UNDER THE AUSTRALIAN CONSUMER LAW
7.1 Goods presented for repair may be replaced by refurbished goods of the same type rather than being
repaired. Refurbished parts may be used to repair the goods.

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 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. power for the electrically operated components. The removal
of the front cover(s) will expose 220 V –240 V a.c. wiring. They must only be removed by a qualified
person.
•This water heater is supplied with thermostats, over-temperature cut-outs, temperature sensors and a
combination temperature pressure relief valve. In addition, an E5X series water heater has a temperature
limiting 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 a 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 water heater will operate until a water temperature of 70°C is reached inside of the cylinder under
normal operation, and up to 80°C could be reached on occasion during periods of excess energy
availability.
An E6X series water heater can deliver water at this temperature.
An E5X series 50°C limited water heater is temperature limited at the outlet. This is so the water
temperature supplied from fixtures used primarily for personal hygiene does not exceed 50°C.
Refer to “Twin Element Operation” on page 11 and to “How Hot Should The Water Be?” on page 13.
•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 a water heater must only be carried out by qualified personnel. Phone your nearest Solahart
Dealer.
•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 16.
•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.

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 22.
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 16.
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 18.
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 either indoor or outdoor installation.
▪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.
•in compliance with the Australian / New Zealand Wiring Rules AS/NZS 3000,
▪An isolation switch must be installed at the switchboard in the electrical circuit to the water heater in
accordance with the Wiring Rules, so the water heater can be switched off. Refer to “Connections –
Electrical” on page 34.
▪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 80°C on occasion.
•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 24 to 37.
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
HOW YOUR WATER HEATER WORKS
ABOUT YOUR SOLAHART POWERSTORE
The Solahart PowerStore Grid Interactive water heater is a premium electric water heater designed to work in
partnership with an external control device, the Energy Management Unit, in order to take advantage of special
tariffs and rebates available from your electricity retailer and when installed with solar PV, use excess solar
PV power production.
The amount of hot water stored in the Solahart PowerStore Grid Interactive water heater will be monitored
using communication through the connected Energy Management Unit and heating times optimised to use
electricity when utility grid supply is higher than customer demand. Hot water monitoring will also ensure
sufficient heating is provided to ensure there is always a minimum amount of hot water stored to meet standard
domestic needs during periods when customer demand for utility grid supply is high.
In addition, when installed with solar PV and an external Power Meter, the PowerStore Grid Interactive water
heater is able to modify its power consumption to be similar to the excess solar PV generation, when the water
it contains requires heating. Water is then heated at the expense of the surrendered solar feed-in tariff, rather
than purchasing energy from the utility grid to perform the heating.
The Solahart PowerStore Grid Interactive water heater also has the ability to tell the Energy Management Unit
and Power Meter the amount of hot water available at any time, enabling it to be used as a key component in
a sophisticated home energy management system (HEMS) provided by a third party service provider. This
would allow the water heater to use utility grid sourced power for additional water heating or to achieve safety
and compliance requirements (when required) at the most economical electricity tariff available.
SYSTEM OPERATION
The Solahart PowerStore Grid Interactive water heater operates as a staged power input water heater at times
when utility grid supply is higher than demand or when there is excess solar PV power production. When
excess power is detected and water heating is required, the water heater’s controller module and the Energy
Management Unit or Power Meter react enabling the water heater to operate at an equivalent power
consumption.
A combination of the unique triple blade multi-stage heating unit design and electronic control enables staged
input from 515 W to full power in ~500 W steps for the lower heating unit. This power control system allows
the water heater to operate whenever smaller or larger amounts of excess solar PV power production or excess
utility grid supply are detected and water heating is required.
The Solahart PowerStore Grid Interactive water heater has inbuilt protection against running low on hot water
and will also maintain a fixed minimum water temperature as a safety and compliance requirement. During
periods when there is no excess utility grid supply or excess power from solar PV generation and heating of
the water is required, electricity from the utility grid will be used to ensure the availability of hot water, by using
the top heating unit.
The water is heated to a temperature up to 70°C under normal operation from utility grid supplied electricity.
On occasion if there is an excess of utility grid supplied electricity available, the Energy Management Unit may
command the water heater to heat the water to a maximum of 80°C to make use of this excess electricity.
Note: If the water heater is installed without either the Energy Management Unit or Power Meter or connection
to a home energy management system (HEMS), it will operate as a conventional twin element electric water
heater. The water will be heated to 70°C. It won’t be able to be part of an intelligent water heating system or
take advantage of excess solar PV power production.

HOW YOUR WATER HEATER WORKS
11
TWIN ELEMENT OPERATION
This water heater has two heating units, each controlled by the temperature sensors and the control system.
One heating unit is near the top of the water heater and the other at the base. The two heating units are wired
for non-simultaneous operation, so only one heating unit can operate at a time.
•Top heating unit
The top heating unit has priority under normal operation to heat the water
in the top portion of the tank.
When there is less than 40 litres of hot water in the tank, the top heating
unit will energise to heat the top 45 litres to a temperature of 70°C using
utility grid supplied electricity during normal operation.
•Bottom heating unit
The bottom heating unit is a triple blade multi-stage power input heating
unit. It is activated under normal operation after the top heating unit has
heated the water in the top portion of the tank.
The bottom heating unit heats the water in the lower portion of the tank to
a temperature of 70°C during normal operation, in response to a
requirement from the electricity utility or during periods of excess solar PV
power generation.
Note: AS 3498 requires that a water heater provides the means to inhibit
the growth of Legionella bacteria in potable water. This requirement is met
if at least 90% of the stored water is heated to 60°C once every seven
days. If this does not occur during normal operation, the water heater will
enter Safety Compliance mode and use utility grid sourced electricity to
satisfy this requirement with heating via the bottom heating unit.
•Electrical connection
The utility grid sourced power supply to the water heater must be a 24 hour Continuous / Domestic Time
of Use type. A separately metered controlled load supply, i.e. Off-Peak / time controlled, is not suitable.
NOTE: Power must be available to the heating units’circuit at all times for this water heater to operate
as designed.

HOW YOUR WATER HEATER WORKS
12
LED OPERATION
The water heater has a green and red LED, housed on the front of the
Controller Module on the lower front of the water heater. The LEDs
indicate the operational status of the water heater.
•Green indicates normal operation
•Red indicates a fault
Types of LED Operation
There are five (5) types of illumination the LEDs may provide. These are:
Illumination
Time
LEDs
Off
remains off
green and red LEDs
Solid
remains on
green and red LEDs
Standard flash
1 sec on, 1 sec off
green LED only
Fast blink flash
0.25 sec on, 0.25 sec off
green and red LEDs
Slow blink flash
0.25 sec on, 9.75 sec off
red LED only
Green LED
The green LED generally indicates various stages of normal operation.
Green LED
Operational Status
Off
no illumination
There may be loss of power, or there may be a fault with the water heater.
Solid
Water is either fully heated or no power request has been received.
No heating taking place.
Standard flash
(continuous flashes)
Top or bottom heating unit operating.
Fast blink flash
Simultaneous with red LED fast blink flash:
•During start-up (<30 seconds) –not a fault
•During firmware update (<30 seconds) –not a fault
•If observed for more than 10 minutes, application firmware maybe corrupted –fault
Red LED
The red LED generally indicates a fault with the water heater.
Red LED
Operational Status
Off
(green LED solid or
standard flash)
System okay –no fault. PLT network connected.
Solid
There is a fault with the water heater.
Fast blink flash
Simultaneous with green LED fast blink flash:
•During start-up (<30 seconds) –not a fault
•During firmware update (<30 seconds) –not a fault
•If observed for more than 10 minutes, application firmware maybe corrupted –fault
Slow blink flash
Energy Management Unit or PLT network not detected
Notes
•If both LEDs are off, there may be a loss of power to the water heater. If there is power available, there
may be a fault with the water heater. Phone your nearest Solahart Dealer to arrange for an inspection.
•If the red LED remains on with a solid illumination, there is a problem with the water heater. Phone your
nearest Solahart Dealer to arrange for an inspection.
•If the red LED is illuminated with a slow blink flash and if an Energy Management Unit is installed, there
may be a problem with the EMU or the water heater. Phone your nearest Solahart Dealer to arrange for
an inspection.
LED interface
green LED
red LED

13
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.
New, used, remanufactured or refurbished parts or products may be used to repair or replace parts or products
which are part of this water heater system. Goods presented for repair may be replaced by refurbished goods
of the same type rather than being repaired.
MODEL TYPE
The Solahart®PowerStore Grid Interactive water heater is suitable for either indoor or outdoor installation. The
water heater has two heating units (refer to “Twin Element Operation”on page 11). Water is stored in a vitreous
enamel lined steel cylinder and heated by the electric immersion heating units. The control system, sensors
and thermostats control the temperature of the water inside the cylinder and the source of the power supply.
An E5X series model is a 50°C limited water heater designed with a temperature limiting valve installed at the
outlet of the cylinder to limit the water temperature delivered from the water heater. This is so the water
temperature supplied to fixtures used primarily for personal hygiene does not exceed 50°C.
An E6X series water heater delivers water at up to 70°C from the hot water outlet during normal operation,
and on occasion up to 80°C if there is an excess of utility grid supplied electricity available.
Automatic safety controls are fitted to the water heater to provide safe and efficient operation.
An E6X series water heater has caps covering brass plugs on one
side of the tank. The plugs and caps block off alternative connection
points and are not to be tampered with or removed.
HOW HOT SHOULD THE WATER BE?
The water heater’s control system allows the water to be heated to a
minimum temperature of 60°C and a temperature of 70°C during
normal operation. On occasion the water may heat to 80°C. These
temperature settings cannot be adjusted.
An E6X series water heater can deliver water at these temperatures.
An E5X series 50°C limited water heater is temperature limited at the
outlet. This is so the water temperature supplied from fixtures used
primarily for personal hygiene does not exceed 50°C.
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 water at temperatures which can cause
scalding.
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.
E6X series –Hot Water Outlet
An E6X series water heater can deliver hot water at a temperature up to 80°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.
We recommend and it may also be required by regulations that an approved temperature limiting device be
fitted into the hot water pipe work and serving a 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.
minimum sensor setting
maximum sensor
setting
50°C limited outlet
temperature and
maximum
recommended supply
temperature to
bathrooms and ensuites
sensor setting for
heating during normal
operation

ABOUT YOUR WATER HEATER
14
E5X series –50°C Limited Water Heater
An E5X series water heater delivers water not exceeding 50°C in accordance with AS 3498. The risk of scald
injury will be reduced.
There is no need to fit a temperature limiting device to satisfy the requirements of the Plumbing Code of
Australia if an E5X series 50°C limited water heater is installed and serving an application where 50°C is the
maximum permissible hot water temperature at the outlet of a fixture used primarily for personal hygiene, such
as in a bathroom or ensuite.
TEMPERATURE ADJUSTMENT, THERMOSTATS, TEMPERATURE SENSORS
The temperature sensors control the maximum water temperature in conjunction with the control system.
Water is heated to either 70°C or 80°C depending on the mode of operation. These temperature settings are
fixed and cannot be adjusted.
Power is only used when heating is required. There is no need to switch the water heater off when it is not in
use, except when you are on an extended holiday.
Each thermostat and its protective over temperature cut out is mounted inside the front covers of the water
heater. The thermostats act as a backup safety device to control the electricity supply to the heating unit. A
‘fault’ may result if a thermostat is adjusted from the factory setting. The thermostats must not be adjusted
or tampered with.
Note: A service call to a PowerStore Grid Interactive water heater as a result of a thermostat having been
adjusted will not be covered under the product warranty, and a service charge will be made for this call-out.
PRECAUTIONS
Where damage to property can occur in the event of the water heater leaking, the water heater must be
installed in a safe tray. Construction, installation and draining of a safe tray must comply with AS/NZS 3500.4
and all local codes and regulatory authority requirements.
The water heater must be maintained in accordance with the Owner’s Guide and Installation Instructions. Refer
to “Maintenance Requirements” on page 16 and to “Anode Inspection and Replacement” on page 19.
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 local Solahart Dealer or specifier about your needs and
building back-up redundancy into your hot water supply system.
TO TURN OFF THE WATER HEATER
If you plan to be away from home for only a few nights, we suggest you leave the water heater switched on.
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 (if installed).
•Close the cold water isolation valve at the inlet to the water heater.
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 (if installed).
When the power is turned on, the green LED will commence to flash to indicate the water heater is heating.
GOING ON HOLIDAY?
If you plan to be away from home for one or two nights, we suggest you leave the water heater switched on.
However, if you plan to stay away more than a few nights, conserve energy by switching the water heater off
at either the switchboard or isolating switch (if one is installed).

ABOUT YOUR WATER HEATER
15
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 18.
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 18 to 20.
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 14.
INTELLECTUAL PROPERTY
On purchase, the Solahart water heater becomes your property, except for the intellectual property and any
other proprietary rights in the firmware or software (“Software”) contained in or accessed through the water
heater’s master control module. The Software is owned by Rheem Australia Pty Ltd and its licensors. You do
not acquire any intellectual property or other proprietary rights in the Software, including without limitation, any
rights in patents, inventions, improvements, designs, trademarks, trade secrets, or copyrights.
You are granted a non-exclusive, non-transferable right to run and use the Software and any updated versions
that we or our licensor may provide to you, only in and as incorporated in your Solahart water heater and for
the normal operation of the water heater. You do not have any rights to obtain future upgrades, updates, or
supplements to any Software.
Certain components of the Software are provided under separate third party license terms (“Separately
Licensed Code”) and your right to use such components is governed by such licence terms.
SOFTWARE UPDATES
Solahart may, in its discretion, provide remote patches or upgrades to the firmware or software (“Software”)
incorporated in your water heater, either directly or through a third party service provider. Remote upgrades
will only be possible if your water heater is connected to the internet through an external control device.
Solahart may also provide software or firmware upgrades during service call outs.

16
MAINTENANCE REQUIREMENTS
MINOR MAINTENANCE EVERY SIX MONTHS
It is recommended minor maintenance be performed every six (6) months. Minor maintenance can be
performed by the dwelling occupant.
The minor maintenance includes:
•Operate the easing lever on the temperature pressure relief valve. It is very important the lever is raised
and lowered gently. Refer to “Relief Valves”on page 8.
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
the valve’s easing lever.
•Operate the easing lever on the expansion control valve (if fitted). It is very important the lever is raised
and lowered gently. Refer to “Relief Valves” on page 8.
•Check the performance of the temperature limiting valve (E5X series water heater).
Use a thermometer to measure the water temperature from the hot tap used primarily for personal hygiene
nearest to the water heater. If the water temperature exceeds 50°C, phone your nearest Solahart Dealer
to arrange for an inspection. Refer to “Temperature Limiting Valve” on page 17.
•Check the drain line from the safe tray (if one is installed) is not blocked.
MAJOR SERVICE EVERY FIVE YEARS
It is recommended a major service be conducted on the water heater every five (5) years.
Warning: Servicing of a water heater must only be carried out by qualified personnel. Phone your nearest
Solahart Dealer.
Note: The major service and routine replacement of any components, such as the anode and relief valve(s),
are not included in the Solahart warranty. A charge will be made for this work. Only genuine replacement parts
should be used on this water heater.
The major service includes the following actions:
•Replace the temperature limiting valve (E5X series water heater ).
•Replace the temperature pressure relief valve.
•Inspect and flush the expansion control valve (if fitted). If required, replace the valve.
•Inspect and if required, replace the anode.
If the anode is not replaced, it should be replaced within five (5) years of this service. Refer to “Anode
Inspection and Replacement” on page 19.
•Check the electric heating units for excessive calcium build-up or corrosion and replace if necessary.
•Visually check the unit for any potential problems.
•Inspect all connections.
•Check the drain line from the safe tray (if one is installed) is not blocked.
Note: The water heater may need to be drained during this service. After the completion of the service, the
water heater will take some time to reheat the water.

MAINTENANCE REQUIREMENTS
17
TEMPERATURE LIMITING VALVE
An E5X series 50°C limited water heater is fitted with a temperature limiting valve at the outlet. The valve is
set so the water temperature from the fixtures used primarily for personal hygiene does not exceed 50°C.
The valve should be checked for performance every twelve months. This can be performed by using a
thermometer to measure the water temperature from the hot tap used primarily for personal hygiene nearest
to the water heater. If the water being delivered is at a temperature exceeding 50°C, phone your nearest
Solahart Dealer to arrange for an inspection.
The valve must be replaced at intervals not exceeding five (5) years, or more frequently in areas where there
is a high incidence of water deposits (refer to “Water Supplies” on page 18). Failure to do this may result in
water at a temperature up to 80°C being delivered at the hot tap, increasing the risk of scald injury.

18
WATER SUPPLIES
This water heater must be installed in accordance with this advice to be covered by the Solahart
warranty.
This water heater is manufactured to suit the water conditions of most public reticulated water supplies.
However, there are some known water chemistries which can have detrimental effects on the water heater
and its operation and / or life expectancy. If you are unsure of your water chemistry, you may be able to obtain
information from your local water supply authority. This water heater should only be connected to a water
supply which complies with these guidelines for the Solahart warranty to apply.
ANODE
The vitreous enamel lined cylinder of the water heater is only covered by the Solahart warranty when the total
dissolved solids (TDS) content in the water is less than 2500 mg/L and when the correct colour coded anode
is used. If an incorrect colour coded anode is used in the water heater, any resultant faults will not be covered
by the Solahart warranty. In addition, the use of an incorrect colour coded anode may shorten the life of the
water heater cylinder.
The correct colour coded anode must be selected and fitted to the water heater in accordance with the following
advice and the Anode Selection chart on page 18 for the Solahart warranty to apply to the water heater
cylinder.
Total Dissolved Solids
Anode colour code
0 –40 mg/L
Green
40 –150 mg/L
Green or Black
150 –400 mg/L
Black
400 –600 mg/L
Black or Blue
600 –2500 mg/L
Blue
2500 mg/L +
Blue (no cylinder warranty)
The changing of an anode must be carried out by a qualified person.
Note: Some water analysis reports may state the conductivity of the water rather than the level of total
dissolved solids. Conductivity, measured in microsiemens per centimetre (µS / cm), is directly proportional to
the TDS content of the water. TDS, in mg / L, is approximately 70% of the conductivity in µS / cm.
(3570)
Green
150
2500
600
400
TOTAL DISSOLVED SOLIDS (TDS) mg/L
(CONDUCTIVITY - μS/cm)
(215)
(570)
(860)
Black
40
(60)
Blue
Blue
ANODE SELECTION
above
2500 mg/L (3570 μS/cm),
no warranty applies to a
vitreous enamel lined
water heater cylinder
warranty applies to a vitreous enamel lined
water heater cylinder if the correct coloured anode
is used for the TDS / conductivity level of the water

WATER SUPPLIES
19
ANODE INSPECTION AND REPLACEMENT
The anode installed in your water heater will slowly dissipate whilst protecting the cylinder. The life of the
cylinder may be extended by replacing the anode.
For water supplies which are either softened or desalinated, or where the water supply may alternate between
a water tank and a reticulated public supply or another supply, or where there is a variable supply (e.g. from a
bore or public reticulated supply from various water sources), the anode must be inspected (and replaced if
there is any sign of depletion) within five (5) years of installation, and within every five (5) years thereafter.
For all water supplies, if the anode is not replaced during a major service (refer to “Major Service Every Five
Years”on page 16) then in any event, the anode must be replaced at ten (10) years.
CAUTION
If the water supply has a TDS greater than 150 mg/L and a green anode has not been changed to a black
anode, or if the TDS is greater than 600 mg/L and the anode has not been changed to a blue anode, there is
the possibility the anode may become overactive and hydrogen gas could accumulate in the top of the water
heater during long periods of no use.
If, under these conditions, the water heater has not been used for two or more weeks the following procedure
should be carried out before using any electrical appliances (automatic washing machines and dishwashers)
which are connected to the hot water supply.
The hydrogen, which is highly flammable, should be vented safely by opening a hot tap and allowing the water
to flow. There should be no smoking or naked flame near the tap whilst it is turned on. Any hydrogen gas will
be dissipated. This is indicated by an unusual spurting of the water from the tap. Once the water runs freely,
any hydrogen in the system will have been released.
SATURATION INDEX
The saturation index is used as a measure of the water’s corrosive or scaling properties. The saturation index
figures stated are calculated using a water temperature of 80°C.
In a corrosive water supply, the water can attack copper parts and cause them to fail. Where the saturation
index is less than –1.0, the water is very corrosive and the Solahart warranty does not apply to the copper
sheathed heating unit.
In a scaling water supply calcium carbonate is deposited out of the water onto any hot metallic surface. Where
the saturation index exceeds +0.40, the water is very scaling. An expansion control valve must be fitted on the
cold water line after the non-return valve to protect and for the Solahart warranty to apply to the temperature
pressure relief valve and water heater cylinder.
Where the saturation index exceeds +0.80, the Solahart warranty does not apply to a standard watts density
heating unit. The bottom triple blade heating unit fitted as standard to this water heater is a low watts density
type. The upper heating unit must be of a low watts density heating unit must be used for the Solahart warranty
to apply to the heating unit.
Water which is scaling may be treated with a water softening device to reduce the saturation index of the water.
Refer to the Saturation Index chart on page 20. Refer to the cold water connection detail on page 31 for the
position of the expansion control valve.
Contact your nearest Solahart Dealer if a replacement heating unit is required.

WATER SUPPLIES
20
CHANGE OF WATER SUPPLY
The changing or alternating from one water supply to another can have a detrimental effect on the operation
and / or life expectation of a water heater cylinder, a temperature pressure relief valve and a heating unit.
Where there is a changeover from one water supply to another, e.g. a rainwater tank supply, bore water supply,
desalinated water supply, public reticulated water supply or water brought in from another supply, then water
chemistry information should be sought from the supplier or it should be tested to ensure the water supply
meets the requirements given in these guidelines for the Solahart warranty to apply.
SUMMARY OF WATER CHEMISTRY ADVICE AFFECTING WARRANTY
The water heater and its components are not suitable for certain water chemistries. Those chemistries are
listed below. If the water heater is connected at any time to a water supply with the following water chemistry,
the Solahart warranty will not cover any resultant faults on the components listed below:
Water Chemistry
Component
Total Dissolved Solids (TDS) > 2500 mg/L
water heater cylinder
Total Dissolved Solids (TDS)
not suitable for anode type
water heater cylinder
Saturation Index (SI) < -1.0
copper sheathed heating unit
Saturation Index (SI) > +0.4
(if expansion control valve is not fitted)
water heater cylinder
temperature pressure relief valve
Saturation Index (SI) > +0.8
standard watts density heating unit