Rheem Induro 6N3315M7 Technical Document

This water heater must be installed and serviced by a qualified person.
Please leave this guide with a responsible officer.
Owner’s Guide
and
Installation Instructions
Rheem Induro®
Stainless Steel Heavy Duty
Electric Water Heater

An electronic copy of these Owner’s Guide and Installation Instructions can be downloaded from
rheem.com.au and rheem.co.nz.
PATENTS
This water heater may be protected by one or more patents or registered designs.
TRADEMARKS
®Registered trademark of Rheem Australia Pty Ltd.
TM Trademark of 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
RESPONSIBLE OFFICER
This booklet contains important information about your
new water heater, including terms of the Rheem warranty.
We recommend you read pages 7 to 18,
and the terms of the Rheem 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
Maintenance Requirements...................................................................................................... 12
Water Supplies........................................................................................................................... 13
Save A Service Call ................................................................................................................... 17
Installation.................................................................................................................................. 19
Connections –Plumbing .......................................................................................................... 25
Connections –Electrical........................................................................................................... 28
Multiple Installations................................................................................................................. 30
Commissioning.......................................................................................................................... 34
Draining The Water Heater ....................................................................................................... 35
RHEEM AUSTRALIA PTY LTD, A.B.N. 21 098 823 511
www.rheem.com.au, www.rheem.co.nz
For Service Telephone 131 031 AUSTRALIA or 0800 657 335 NEW ZEALAND

4
RHEEM INDURO SS HEAVY DUTY ELECTRIC MAINS PRESSURE
WATER HEATER
WARRANTY - AUSTRALIA AND NEW ZEALAND ONLY
ELECTRIC WATER HEATER MODELS 6N3315M7 AND 6N3315M8
1. THE RHEEM WARRANTY –GENERAL
1.1 This warranty is given in Australia by Rheem Australia Pty Limited ABN 21 098 823 511 of 1 Alan Street,
Rydalmere New South Wales, and in New Zealand by Rheem New Zealand Limited of 475 Rosebank
Road Avondale Auckland 1026.
1.2 Rheem offer a trained and qualified national service network who will repair or replace components at
the address of the water heater subject to the terms of the Rheem warranty. Rheem Service, in addition
can provide preventative maintenance and advice on the operation of your water heater. The Rheem
Service contactnumber in Australia is 131031, with Contact Centrepersonnel available24 hours, 7 days
a week to take your call and if necessary to arrange a service call for during normal working hours
Monday to Friday (hours subject to change) or in New Zealand on 0800 657 335.
1.3 For details about this warranty, you can contact us in Australia on 131031 or by email at
[email protected] (not for service bookings), or in New Zealand on 0800 657 335 or by
email at [email protected] (not for service bookings).
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 August 2018.
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 RHEEM WARRANTY AND EXCLUSIONS TO IT
2.1 The decision of whether to repair or replace a faulty component is at Rheem’s sole discretion.
2.2 If you require a call out and we find that the fault is not covered by the Rheem warranty, you are
responsible for our standard call out charge. If you wish to have the relevant component repaired or
replaced by Rheem, 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 Rheem warranty.
2.4 Where the water heater is installed outside the boundaries of a metropolitan area as defined by Rheem
or further than 25 km from either a regional Rheem branch office or an Accredited Rheem Service
Agent's / Centre’s office, the cost of transport, insurance and travelling between the nearest branch
office or Rheem Accredited Service Agent’s / Centre’s office 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 groundlevel or to a serviceable
position is not covered by this warranty.
2.6 Thiswarranty onlyapplies totheoriginal andgenuineRheemwater heaterin itsoriginal installedlocation
and any genuine Rheem replacement parts.
2.7 The Rheem 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.

RHEEM INDURO SS HEAVY DUTY ELECTRIC MAINS PRESSURE
WATER HEATER
WARRANTY - AUSTRALIA AND NEW ZEALAND ONLY
5
ELECTRIC WATER HEATER MODELS 6N3315M7 AND 6N3315M8
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 Rheem
Service or a Rheem Accredited Service Agent / Centre.
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.
2.8 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.
2.9 If the water heater is not sized to supply the hot water demand in accordance with the guidelines in the
Rheem water heater literature, any resultant fault will not be covered by the Rheem warranty.
2.10 In New Zealand this warranty excludes to the extent permissible all implied warranties set out in the
Sale of Goods Act 1908 (New Zealand) and all guarantees set out in the Consumers Guarantees Act
1993 (New Zealand) to the extent that the goods are acquired for the purpose of resupply in trade
consumption in the course of a process of production or manufacture or repairing or treating in trade
other goods or fixtures on land.
2.11 Rheem may reject a claim under this warranty in its sole discretion if a third party solar diverter is
connected to the water heater.
3. WHAT IS COVERED BY THE RHEEM WARRANTY
FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT
3.1 Rheem 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
6N3315M7 AND 6N3315M8 models
All components
Year 1
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 with a thermostat
setting below 76°C)
Years 2 & 3
Repair and / or replacement of the cylinder,
free of charge, including labour.
Years 4 to 12
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 with a
thermostat setting below 76°C)
Years 2 to 8
Replacement cylinder, free of charge.
Installation and repair labour costs are the
responsibility of the owner.

RHEEM INDURO SS HEAVY DUTY ELECTRIC MAINS PRESSURE
WATER HEATER
WARRANTY - AUSTRALIA AND NEW ZEALAND ONLY
6
ELECTRIC WATER HEATER MODELS 6N3315M7 AND 6N3315M8
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 Rheem Service 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 or New Zealand.
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 Rheem on 131031 in Australia or 0800 657 335 in New Zealand 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) Rheem will arrange for the water heater to be tested and assessed on-site.
c) If Rheem determines that you have a valid warranty claim, Rheem 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 Rheem warranty (set out above) is in addition to any rights and remedies that you may have under
the Australian Consumer Law.
7. THE CONSUMER GUARANTEES ACT 1993 (NEW ZEALAND)
7.1 Our goods come with guarantees that cannot be excluded under the Consumer Guarantees Act 1993
(New Zealand). If the goods fail to comply with the applicable guarantees set out under the Consumer
Guarantees Act 1993 (New Zealand) being the guarantee as to acceptable quality, the guarantee as to
correspondence with description or the guarantee as to repair and parts, or if the goods fail to comply
with any express guarantee given by Rheem, then you are entitled to a replacement or refund and for
compensation for any other reasonably foreseeable loss or damage.
7.2 The Rheem warranty (set out above) is in addition to any rights and remedies that you may have under
the Consumer Guarantees Act 1993 (New Zealand).

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 Rheem Service or their nearest Accredited Service Agent / Centre to arrange
for an inspection.
•This water heater uses 220V –240V a.c. power (each element) for the electrically operated components.
The removal of the front cover(s) will expose 220V –240V a.c. wiring (each element). They must only be
removed by a qualified person.
•This water heater is supplied with thermostats, over-temperature cut-outs 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 Rheem 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 60°C to 75°C is reached, depending upon the
setting of the thermostats.
Refer to “How Hot Should The Water Be?” 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 12.
•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 Rheem Service or their
nearest Accredited Service Agent / Centre.
•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. Thisvalve 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, New
Zealand 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 18.
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 itsdrain line are not blocked. It is very important
the lever is raised and lowered gently. Refer to “Minor Maintenance Every Six Months” on page 12.
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 Rheem Service or their nearest Accredited Service Agent / Centre 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 13.
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 suitable 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 28.
▪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 75°C under normal operation.
•in compliance with all local codes and regulatory authority requirements.
•in New Zealand also conforming to Clauses G12 and H1 of the New Zealand Building Code.
Installation and commissioning requirements and details for the installing plumber and licensed electrical
worker are contained on pages 19 to 34.
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 the purpose of heating potable water.
Its use in an application other than this may shorten its life.
MODEL TYPE
The Rheem®Stainless steel heavy duty Electric water heater model you
have chosen can be installed indoor or outdoor and is 315 litre model and
the 315 litre has three heating units.
Water is stored in a stainless steel cylinder and heated by 3 electric
immersion heating units. The temperature is controlled by thermostats.
Automatic safety controls are fitted to the water heater to provide safe and
efficient operation.
HOW HOT SHOULD THE WATER BE?
The water heater has a minimum temperature setting of 60°C and a
maximum recommended thermostat setting of 75°C. Refer to
“Temperature Adjustment” on page 11.
To meet the requirements of the National Plumbing Standard the
temperature of the stored water must not be below 60°C.
If this water heater is installed as an in-series booster water heater as part
of a solar water heating system, to maximise solar contribution it is
recommended the thermostats are set at 60°C, unless sanitising
temperatures are required.
Note: Australian Standard AS 3498 and New Zealand Building Code
Clause G12 require that a water heater provides the means to inhibit the
growth of Legionella bacteria in potable water. This water heater can
satisfy these AS 3498 and Clause G12 requirements provided it is
energised and the thermostat setting is 60°C or higher, including when it
is used as an in-series booster water heater for a solar water heater.
HOTTER WATER INCREASES THE RISK OF SCALD INJURY
This water heater can deliver hot water at a temperature up to 75°C
depending upon its thermostat setting. This temperature is 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 a
kitchen, laundry and other areas requiring sanitising temperatures.
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 be required by regulations that an approved temperature limiting device be fitted
into the hot water pipe work to bathrooms, ensuites, public amenities or other ablution areas when this water
heater is installed. This will keep the water temperature below the maximum permitted by the Plumbing Code
of Australia and New Zealand Building Code Clause G12 to these areas. The risk of scald injury will be reduced
and still allow hotter water to the kitchen, laundry and other areas requiring sanitising temperatures.
THERMOSTATS
The thermostats automatically control the electricity supply to the heating units so a constant temperature is
maintained. The thermostats and their protective over temperature cut out are mounted inside the front cover
of the water heater. There is no need to switch the water heater off when it is not in use. The thermostats are
fully automatic and power is only used when heating is required.
maximum recommended
thermostat setting
6N3315M7 –75°C
6N3315M8 –75°C
minimum recommended
stored water temperature
maximum recommended
supply temperature to
bathrooms, ensuites and
public areas

11
TEMPERATURE ADJUSTMENT
The water heater features tradesperson adjustable thermostats. They require a licensed electrical worker to
make any temperature adjustments. We advise the thermostats are adjusted to the lowest temperature setting
that meets your needs, especially if there are young children or elderly people in the premises. Refer to “Hotter
Water Increases the Risk of Scald Injury” on page 10.
PRECAUTIONS
Under certain installation conditions where damage to property can occur in the event of the water heater
leaking AS/NZS 3500.4 requires the water heater 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. In New Zealand the safe tray must also meet the requirements of Clause G12 of the New
Zealand Building Code. AS/NZS 3500.4 and the NZBC also have particular requirements when a safe tray
must be installed. Alternatively, where additional leak protection is required for installations not defined by
AS/NZS 3500.4, a suitable bund may be constructed to surround the water heater in lieu of using a safe tray.
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.
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(s) on the switchboard or at the isolating
switch(s) at the water heater(s) (if installed).
•Close the cold water isolation valve on the cold water line to the water heater(s) to shut down the entire
system, or;
•Close the isolation valves on the cold and hot water branches to shut down an individual water heater in
a bank.
TO TURN ON THE WATER HEATER
•Open the isolation valves fully on the cold and hot water branches to the water heater(s) installed in a
bank.
•Open the cold water isolation valve on the cold water line to the water heater(s). Air will be forced out of
the taps.
•Switch on the electrical supply at the water heater isolating switch(s) on the switchboard and at the
isolating switch(s) at the water heater(s) (if installed).
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 13.
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 13 to 16.
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.

12
MAINTENANCE REQUIREMENTS
MINOR MAINTENANCE EVERY SIX MONTHS
It is recommended minor maintenance be performed every six (6) months. Minor maintenance can be
performed by a responsible officer.
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 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 Rheem
Service or their nearest Accredited Service Agent / Centre.
Note: The major service and routine replacement of any components, such as the relief valve(s), are not
included in the Rheem 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 pressure relief valve.
•Inspect and flush the expansion control valve (if fitted). If required, replace the valve.
•Check the electric heating units for excessive calcium build-up or corrosion and replace if necessary.
•Drain and flush the water heater if required.
In commercial applications where large volumes of hot water are used, sediment may build-up on the
bottom of the cylinder. In extreme cases, particularly in areas of high water sediment, draining and flushing
out may be 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. Depending upon the power supply connection, hot water
may not be available until the next day.

13
WATER SUPPLIES

WATER SUPPLIES
14
This water heater must be installed in accordance with this advice to be covered by the Rheem
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. A list of postcodes is available on the Rheem website
(www.rheem.com.au) indicating known areas where the stainless steel cylinder is not covered by the Rheem
warranty due to the water chemistry of the area. The list is not necessarily exhaustive and there may be areas
outside of these postcodes where the stainless steel cylinder is not covered by the Rheem warranty due to the
water chemistry of the area. 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, which takes precedence over the list of postcodes, for the Rheem warranty to
apply. It is recommended to install a suitable filter on the cold water supply line to the water heater if the water
supply contains or has a future risk of containing suspended solids. The Rheem warranty will not cover
resultant faults on components including the stainless steel cylinder due to the effects of sludge and / or
sediment settling in the water heater.
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 Rheem warranty to apply.
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.
CHLORIDE AND PH
In a high chloride water supply, the water can corrode stainless steel parts and cause them to fail.
Where the chloride level exceeds 250 mg / L the Rheem warranty does not apply to a stainless steel cylinder.
pH is a measure of whether the water is alkaline or acid. In an acidic or very alkaline water supply, the water
can attack stainless steel parts and cause them to fail.
Where the pH is less than 6.0 or greater than 9.5, the Rheem warranty does not apply to a stainless steel
cylinder. Water with a pH less than 6.0 may be treated to raise the pH.
The water supply from a rainwater tank in a metropolitan area is likely to be corrosive due to the dissolution of
atmospheric contaminants. This may result in pH of less than 6.0. It is recommended an analysis on the water
from a rainwater tank be conducted prior to connecting this type of water supply to a water heater with a
stainless steel cylinder.
Refer to the pH and Chloride chart on page 15.

WATER SUPPLIES
15
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 Rheem warranty does not apply to a copper
sheathed heating unit.
A corrosion resistant heating unit must be used for the Rheem warranty to apply to the heating unit. This water
heater is supplied fitted with a corrosion resistant 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 Rheem warranty to apply to thetemperature pressure relief valve and water heater cylinder.
Where the saturation index exceeds +0.80, the Rheem warranty does not apply to a stainless steel cylinder or
a standard watts density heating unit. A low watts density heating unit must be used for the Rheem 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.
Contact Rheem Service or their nearest Accredited Service Agent if a replacement heating unit is required.
Refer to the Saturation Index chart on page 16. Refer to the cold water connection detail on page 35 for the
position of the expansion control valve.

WATER SUPPLIES
16
TOTAL DISSOLVED SOLIDS
The stainless steel cylinder of the water heater is only covered by the Rheem warranty when the total dissolved
solids (TDS) content in the water is less than 600 mg / L.
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.
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 Rheem warranty will not cover any resultant faults on the components listed below:
Water Chemistry
Component
Chloride > 250 mg/L
Total Dissolved Solids (TDS) > 600 mg/L
water heater cylinder
water heater cylinder
pH < 6.0 or > 9.5
Saturation Index (SI) < -1.0
Water heater cylinder
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

17
SAVE A SERVICE CALL
Check the items below before making a service call. You will be charged for attending to any condition or fault
that is not related to manufacture or failure of a part.
NOT ENOUGH HOT WATER (OR NO HOT WATER)
•Is the electricity switched on?
Inspect the isolating switch marked “HOT WATER” or “WATER
HEATER” at the switchboard and the isolating switch (if one is
installed) near the water heater and ensure they are turned on.
Note: Check the electricity supply to which the water heater is
connected. If on a time controlled electricity supply, remember
heating hours are restricted.
Check the fuse or circuit breaker marked “HOT WATER” or
“WATER HEATER” at the switchboard.
•Are you using more hot water than you think?
Are outlets (especially the showers) using more hot water than you think? Very often it is not realised the
amount of hot water used, particularly when showering.
Carefully review the hot water usage. Have your plumber fit a flow control valve to each shower outlet to
reduce water usage.
•Relief valve running
Is the relief valve discharging too much water?
Refer to “Temperature Pressure Relief Valve or Expansion Control Valve Running” on page 18.
•Thermostat setting
Ensure the thermostat setting is appropriate. You may choose to have a licensed electrical worker adjust
the thermostats upwards to gain additional hot water capacity.
Warning: Hotter water increases the risk of scald injury.
•Water heater size
Do you have the correct size water heater for your requirements?
The sizing guide in the Rheem sales literature and on the Rheem website (www.rheem.com.au) suggests
average sizes that may be needed.

SAVE A SERVICE CALL
18
TEMPERATURE PRESSURE RELIEF VALVE OR EXPANSION CONTROL VALVE RUNNING
•Normal Operation
It is normal and desirable the temperature pressure relief valve or
expansion control valve (if fitted) allows a quantity of water to escape
during the heating cycle. This quantity should be equal to
approximately 1/50 of the hot water used, as water expands by this
volume when heated. However, if it discharges more than a bucket full
of water in 24 hours, there may be another problem.
The expansion control valve (if fitted) will discharge water instead of
the temperature pressure relief valve as it has a lower pressure rating.
A benefit is that energy is conserved as the discharged water is cooler.
This valve is installed in the cold water line to the water heater (refer
to the cold water connection diagram on page 25).
•Continuous dribble
Try gently raising the easing lever on the relief valve for a few seconds
(refer to “Relief Valves” on page 8). This may dislodge a small particle
of foreign matter and clear the fault. Release the lever gently.
•Steady flows for long period (often at night)
This may indicate the mains water pressure sometimes rises above
the designed pressure of the water heater. Ask your installing plumber
to fit a pressure limiting valve.
Warning: Never replace the relief valve with one of a higher pressure rating.
•Heavy flows of hot water from the temperature pressure relief valve until water heater is cold -
then stops until water reheats
The water heater must be switched off at the switchboard. Phone Rheem Service or their nearest
Accredited Service Agent / Centre to arrange for inspection.
HIGHER THAN EXPECTED ELECTRICITY BILLS
Should you at any time, feel your electricity bill is higher than expected, we suggest you check the following
points:
•Is the relief valve running excessively?
Refer to “Temperature Pressure Relief Valve or Expansion
Control Valve Running” on page 18.
Are outlets (especially the showers) using more hot water than
you think?
Refer to “Not Enough Hot Water” on page 17.
•Is there a leaking hot water pipe, dripping hot water tap, etc?
Even a small leak will waste a surprising quantity of hot water
and electricity. Replace faulty tap washers, and have your
plumber rectify any leaking pipe work.
•Has there been an increase in hot water usage?
An increase in hot water usage will result in an increase in water heater operation.
•Has your water heating tariff rate been increased by your electricity retailer since your previous bill?
•The electricity tariff to which your water heater is connected will determine the overall operating cost of
the system.
It is important you are aware of this tariff, i.e. continuous or time controlled supply.
IF YOU HAVE CHECKED ALL THE FOREGOING AND STILL BELIEVEYOU NEED ASSISTANCE, PHONE
RHEEM SERVICE OR THEIR NEAREST ACCREDITED SERVICE AGENT / CENTRE.

19
INSTALLATION
THIS WATER HEATER IS NOT SUITABLE FOR POOL HEATING
INSTALLATION STANDARDS
The water heater must be installed:
•by a qualified person, and
•in accordance with the installation instructions, and
•in compliance with the Plumbing Code of Australia (PCA), Standards AS/NZS 3500.4 and AS/NZS 3000,
and all local codes and regulatory authority requirements.
•in New Zealand also conforming to Clauses G12 and H1 of the New Zealand Building Code.
Warning: This water heater may deliver water at high temperature. Refer to the Plumbing Code of
Australia, local requirements and these installation instructions to determine if additional delivery temperature
control is required. Refer to “Hot Water Delivery” on page 21.
All packaging materials must be removed from the water heater prior to its installation. This includes the
removal of the cardboard base of the carton from the underside of the water heater.
WATER HEATER APPLICATION
This water heater is designed for the purpose of heating potable water. Its use in an application other than this
may shorten its life.
If this water heater is to be used where an uninterrupted hot water supply is necessary for the application or
business, then there should be 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 was to become inoperable for any reason.
We recommend you provide advice to the system owner about their needs and building back-up redundancy
into the hot water supply system.
Note: Australian Standard AS 3498 and New Zealand Building Code Clause G12 require that a water heater
provides the means to inhibit the growth of Legionella bacteria in potable water. This water heater can satisfy
these AS 3498 and Clause G12 requirements provided it is energised and the thermostat setting is 60°C or
higher, including when it is used as an in-series booster water heater for a solar water heater.
WATER HEATER LOCATION
This water heater is suitable for either outdoor (water ingress protection rating of IPX4) or indoor installation.
Whether located outdoor or indoor, the water heater should be installed either close to the most frequently
used outlets or with a circulated flow and return system and its position chosen withsafety and service in mind.
Warning: Avoid installing the water heater subjected to low or high pressure water stream from any angle.
The water heater must not be installed in an area with a corrosive atmosphere where chemicals are stored or
where aerosol propellants are released.
Clearance must be allowed for servicing of the water heater. The water heater
must be accessible without the use of a ladder or scaffold. Make sure the
temperature pressure relief valve lever is accessible and the front cover,
thermostats and heating units can be removed for service. You must be able
to read the information on the rating plate. Remember you may have to take
the entire water heater out later for servicing.
The water heater is to be installed at ground or floor level and must stand
vertically upright on a stable base as acceptable to local authorities. The base
of the water heater is made of corrosion resistant material, and it may be placed
directly in contact with the supporting surface. It is not necessary to allow for
free air circulation under the base of the water heater.

INSTALLATION
20
Note: The water heater should not be placed in direct contact with a concrete surface that is less than two
months old and notfully cured as this may attack the metal coatingof the water heater base. Amoisture barrier
should be used between the two surfaces in this instance. The barrier should extend at least 100 mm from the
water heater and may be trimmed after two months.
Remember all local authorities have regulations about putting water heaters into roof spaces.
For a single water heater installation, follow the diagram on page 24. For multiple water heater installations,
follow the instructions on pages 30 to 33.
SAFE TRAY
Under certain installation conditions where damage to property can occur
in the event of the water heater leaking AS/NZS 3500.4 requires the water
heater 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. In New Zealand the safe tray must also
meet the requirements of Clause G12 of the New Zealand Building Code.
AS/NZS 3500.4 and the NZBC also have particular requirements when a
safe tray must be installed. Alternatively, where additional leak protection
is required for installations not defined by AS/NZS 3500.4, a suitable bund
may be constructed to surround the water heater in lieu of using a safe tray.
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below, an approved pressure limiting
valve is required and should be fitted as shown in the cold water connection diagram on page 25.
Model
050, 315
Temperature pressure relief valve setting
1000kPa
Expansion control valve setting*
850kPa
Maximum mains supply pressure
With expansion control valve
680kPa
Without expansion control valve
800kPa
* Expansion control valve not supplied with water heater
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a pressure pump system is not installed, then
the bottom of the supply tank must be at least 1 m above the highest point of the hot water plumbing system,
including the water heater. Care must be taken to avoid air locks. The cold water line to the water heater should
be adequately sized and fitted with a full flow gate valve or ball valve.
BOOSTER WATER HEATER INSTALLATION
It can be advantageous to plumb the Stainless steel heavy
duty electric water heater as a booster water heater in some
cases. In this type of installation, the water heater is plumbed
into a hot water circuit, with hot water being supplied to the
inlet of the water heater. The hot water is then boosted to a
higher temperature. This may be necessary to achieve a
particular temperature when required for certain applications.
Isolation valves are required on the inlet line to and the outlet
line from the water heater.
Refer to “Safe Tray” on page 20.
SADDLING PIPE WORK
To prevent damage to the cylinder when attaching pipe clips or saddles to the water heater jacket, we
recommend the use of self-drilling screws with a maximum length of 13 mm. Should pre-drilling be required,
extreme caution must be observed when penetrating the jacket of the water heater.
Note: If the cylinder is damaged as a result of attaching pipe clips or saddles to the jacket, any resultant
faults will not be covered by the Rheem warranty.