Rheem 610340 Technical Document

This storage tank must be installed and serviced by a qualified person.
Please leave this guide with the householder.
Owner’s Guide
and
Installation Instructions
Commercial
Storage Tank

PATENTS
This storage tank may be protected by one or more patents or registered designs
in the name of Rheem Australia Pty Ltd.
TRADEMARKS
®Registered trademark of Rheem Australia Pty Ltd.
TM Trademark of 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 publication.
WARNING: Plumber –Be Aware
The primary flow and return pipes between the storage tank(s) and the primary water heating source,
including the solar hot and solar cold pipes between the solar storage tank(s) and the solar collectors,
MUST BE of copper. All compression fittings must use brass or copper olives.
The full length of the primary flow and return pipes MUST BE insulated.
The insulation must:
be of a type suitable for the application and capable of withstanding the temperature of the water
generated by the primary water heating source
The specification of the chosen insulation material should be checked with the insulation
manufacturer prior to installation as different materials may vary in temperature tolerance.
Closed cell type or equivalent insulation used between the storage tank(s) and solar collectors, if
this storage tank is part of a solar water heater installation, must be able to withstand the
temperature of the water generated by the solar collectors under stagnation conditions. Refer to
the installation instructions provided with the solar controller for full details on the insulation
requirements of the solar hot and solar cold pipes.
be at least 13 mm thick, however thicker insulation may be required to comply with the
requirements of AS/NZS 3500.4
be weatherproof and UV resistant if exposed
be fitted up to and cover the connections on both the storage tank(s) and the primary heating
source.
The insulation will reduce pipe heat losses and also assist in avoiding accidental contact with the pipe
work as high temperature water can flow from the primary heating source and the storage tank(s).
In addition, the insulation on the solar hot and solar cold pipes must also:
extend through any penetrations in the eaves, ceiling and roof
cover valves and fittings in the solar hot and solar cold pipe work
Note: Failure to observe these requirements also increases the risk of freeze damage.
The insulation is essential to assist in providing freeze protection and will offer protection to a metal
roof against corrosion due to water running off the copper pipes.
Uninsulated pipe work, including concealed in cavities and roof spaces or where it may be in contact
with a metal roof, may lead to freeze damage. The system has NO WARRANTY for freeze damage if
the solar hot and solar cold pipes are not insulated in accordance with the installation instructions.
Plumber: It is important to refer to and read in full the complete
“Warning: Plumber – Be Aware” statement commencing on page 22.

3
CONTENTS
RESPONSIBLE OFFICER - We recommend you read pages 4 - 12.
The other pages are intended for the installer but may be of interest.
About Your Storage Tank ........................................................................................................... 4
Maintenance Requirements........................................................................................................ 7
Water Supplies............................................................................................................................. 9
Save A Service Call ................................................................................................................... 12
Installation.................................................................................................................................. 13
Connections –Plumbing .......................................................................................................... 20
Connections –Electrical........................................................................................................... 23
Multiple Installations................................................................................................................. 24
Commissioning.......................................................................................................................... 32
Draining The Storage Tank....................................................................................................... 33
Warranty..................................................................................................................................... 35

4
ABOUT YOUR STORAGE TANK
STORAGE TANK APPLICATION
This storage tank is designed for the purpose of storing heated potable water. Its use in an application other
than this may shorten its life.
MODEL TYPE
The Rheem®Commercial hot water storage tank you have chosen can be installed indoor or outdoor and is
either a 610 340 or 610 430 model.
Water is stored in a vitreous enamel lined steel cylinder and heated by an external primary heating source.
The temperature is controlled by the thermostat(s) on the primary heating source. Automatic safety controls
must be fitted to the primary heating source to provide safe and efficient operation.
MAINS PRESSURE
The storage tank is designed to operate at mains pressure by connecting directly to the mains water supply.
If the mains supply pressure in your area exceeds that shown on page 14, a pressure limiting valve must be
fitted. The supply pressure should be greater than 350 kPa for true mains pressure operation to be achieved.
HOW HOT SHOULD THE WATER BE?
The storage tank is designed for a maximum recommended water
temperature of 82°C. Refer to the installation instructions supplied
with the primary heating source plant for further information on water
temperatures.
If this storage tank is installed as part of a solar water heater, to
maximise solar contribution it is recommended the thermostats of
the in-series booster water heaters are set at 60°C if a dead leg
system is installed or 65°C if a circulated flow and return system is
installed, unless sanitising temperatures are required.
Note: AS 3498 requires that a water heater provides the means to
inhibit the growth of Legionella bacteria in potable water.
If this storage tank is installed as part of a solar water heater to an
in-series storage water heater, then this requirement of AS 3498 can
be satisfied provided the storage water heater is energised and the
thermostat setting is 60°C or higher.
If this storage tank is installed as part of a solar water heater to an in-series continuous flow gas booster, then
this requirement of AS 3498 can be satisfied provided the booster is energised, its preset outlet temperature
setting is 70°C or higher and a remote temperature controller is not used.
HOTTER WATER INCREASES THE RISK OF SCALD INJURY.
This storage tank 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.
We recommend and it may also be required by regulations that an approved temperature limiting device be
fitted into the hot water pipe work to the bathing and public areas when this storage tank is installed. This will
keep the water temperature below 50°C or the maximum permitted by AS/NZS 3500.4 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.
TEMPERATURE ADJUSTMENT
We advise the thermostats of the primary heating plant are adjusted to the lowest temperature setting that
meets your needs, especially if there are young children or elderly people in the premises, but they should not
be set to less than 60°C. Refer to “Hotter Water Increases the Risk of Scald Injury” on page 4.
maximum recommended
thermostat setting (82°C) of
primary heating source
minimum recommended
thermostat setting of primary
heating source
maximum recommended
supply temperature to
bathrooms, ensuites and
public areas

ABOUT YOUR STORAGE TANK
5
WARNING
This storage tank is only intended to be operated by persons who have the experience or the knowledge and
the capabilities to do so. This storage tank 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 storage tank.
SAFETY
This storage tank is supplied with a combination temperature pressure relief valve. This valve has a rating of
46 kW. If the primary heating source has an output exceeding this valve, additional relief valves are required.
The valve(s) must not be tampered with or removed. The storage tank and its primary heating source must
not be operated unless each of these devices is fitted and is in working order.
If a remote thermostat (Tankstat) is fitted to the storage tank and the electrical conduit 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 to arrange for an inspection.
Warning: For continued safety of this water heating system it must be installed, operated and maintained
in accordance with the Owner’s Guide and Installation Instructions.
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.
PRECAUTIONS
Where damage to property can occur in the event of the storage tank leaking, the storage tank 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 storage tank must be maintained in accordance with the Owner’s Guide and Installation Instructions.
Refer to “Maintenance Requirements” on page 7 and to “Anode Inspection and Replacement” on page 10.
If this storage tank 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 storage tank 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 STORAGE TANK
If it is necessary to turn off the storage tank:
Turn off the primary water heating plant and switch off the electrical supply at the isolating switch to the
circulating pump(s).
Close the cold water isolation valve on the cold water line to the storage tank(s) to shut down the entire
system, or;
Close the isolation valves on the cold, flow / return and hot water branches to shut down an individual
storage tank in a bank.
TO TURN ON THE STORAGE TANK
Open the isolation valves fully on the cold, flow / return and hot water branches to the storage tank(s)
installed in a bank.
Open the cold water isolation valve on the cold water line to the storage tank(s). Air will be forced out of
the taps.
Switch on the electrical supply at the isolating switch to the circulating pump(s) and turn on the primary
water heating plant.

ABOUT YOUR STORAGE TANK
6
HOW DO I KNOW IF THE STORAGE TANK IS INSTALLED CORRECTLY?
Installation requirements are shown on pages 13 to 19 and 24 to 29. The storage tank must be installed:
by a qualified person, and
in accordance with the installation instructions, and
in compliance with Standard AS/NZS 3500.4 and all local codes and regulatory authority requirements.
In New Zealand the installation must also conform to the New Zealand Building Code.
VICTORIAN CUSTOMERS
Notice to Victorian Customers from the Victorian Plumbing Industry Commission. This storage tank 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 storage tank and ask for your Compliance Certificate.
DOES THE WATER CHEMISTRY AFFECT THE STORAGE TANK?
The storage tank is suitable for most public water supplies, however some water chemistries may have
detrimental effects on the storage tank, its components and fittings. Refer to “Water Supplies” on page 9.
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 9 to 11.
HOW LONG WILL THE STORAGE TANK LAST?
The storage tank is supported by a manufacturer’s warranty (refer to page 35). There are a number of factors
that will affect the length of service the storage tank 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 5.

7
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 you raise and
lower the lever gently. Refer to “Temperature Pressure Relief Valve” on page 8.
Warning: Exercise care to avoid any splashing of water, as water discharged from the drain line will
be hot. Stand clear of the drain line’s point of discharge when operating the valve’s lever.
Operate the easing lever on the expansion control valve (if fitted). It is very important you raise and lower
the lever gently. Refer to “Expansion Control Valve” 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 the storage tank must only be carried out by qualified personnel. Phone Rheem
Service or their nearest Accredited Service Agent.
Note: The major service and routine replacement of any components, such as the anode and 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 storage tank.
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.
Inspect and if required, replace the anode.
If the anode is not replaced, it should be replaced within three years of this service (refer to “Anode
Inspection and Replacement” on page 10).
Drain and flush the storage tank 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 storage tank 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 heating source, hot water may not
be available for a while.

MAINTENANCE REQUIREMENTS
8
TEMPERATURE PRESSURE RELIEF VALVE
This valve is near the top of the storage tank and is essential for its
safe operation. It is possible for the valve to release a little water
through the drain line during each heating period. This occurs as the
water is heated and expands by approximately 1/50 of its volume.
Continuous leakage of water from the valve and its drain line may
indicate a problem with the water heater (refer to “Temperature
Pressure Relief Valve Running” on page 12).
Warning: Never block the outlet of this valve or its drain line for
any reason.
Operate the easing lever on the temperature pressure relief valve
once every six months. Refer to “Minor Maintenance Every Six
Months”on page 7. It is very important the lever is raised and
lowered gently.
Warning: Failure to do this may result in the storage tank
cylinder failing.
Warning: Exercise care to avoid any splashing of water, as water
discharged from the drain line will be hot. Stand clear of the drain
line’s point of discharge when operating the valve’s lever.
If water does not flow freely from the drain line when the lever is
lifted, then the storage tank must be checked. Phone Rheem
Service or their nearest Accredited Service Agent.
The temperature pressure relief valve should 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 9).
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 may
discharge a small quantity of water from its drain line during the heating period instead of the temperature
pressure relief valve on the water heater.
Operate the easing lever on the expansion control valve once every six months. Refer to “Minor Maintenance
Every Six Months”on page 7. It is very important the lever is raised and lowered gently. If water does not
flow freely from the drain line when the lever is lifted, then the water heater should be checked by Rheem
Service or their nearest Accredited Service Agent. The expansion control valve should be checked for
performance or replaced at intervals not exceeding five (5) years, or more frequently in areas where there is
a high incidence of water deposits.
storage
tank
drain
line
lift until water
flows from the
drain line –
lower gently

9
WATER SUPPLIES
This storage tank must be installed in accordance with this advice to be covered by the Rheem
warranty.
This storage tank 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 storage tank
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 storage tank should only be connected to a
water supply which complies with these guidelines for the Rheem warranty to apply.
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 storage tank cylinder and a temperature pressure relief valve.
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.
ANODE
The vitreous enamel lined cylinder of the storage tank is only covered by the Rheem 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 storage tank, any resultant faults will not be covered
by the Rheem warranty. In addition, the use of an incorrect colour coded anode may shorten the life of the
storage tank cylinder.
The correct colour coded anode must be selected and fitted to the storage tank in accordance with the
following advice and the Anode Selection chart on page 9 for the Rheem warranty to apply to the storage tank
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,
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 of the water

WATER SUPPLIES
10
ANODE INSPECTION AND REPLACEMENT
The anode installed in your storage tank 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 5 years of its installation.
For all water supplies, if the anode is not replaced during a major service (refer to “Major Service Every Five
Years” on page 7) then the maximum time after installation when the anode should be replaced for this
storage tank is 8 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
storage tank during long periods of no use. In areas where this is likely to occur, the installer should instruct
the householder on how to dissipate the gas safely.
If, under these conditions, the storage tank 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 (SI) is used as a measure of the water’s corrosive or scaling properties.
In a corrosive water supply, the water can attack copper parts and cause them to fail.
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 the
temperature pressure relief valve and storage tank cylinder. 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 10. Refer to the cold water connection detail on page 20 for the
position of the expansion control valve.
corrosive
very corrosive very scaling
scaling
SATURATION INDEX
(calculated @ 80°C water temperature)
-1.0
WITHIN WARRANTY
SPECIFICATION
+0.8
no warranty applies to a:
temperature pressure relief
valve or a water heater
cylinder unless an expansion
control valve is fitted.
0
SATURATION INDEX (SI)
STORAGE TANKS
+0.4

WATER SUPPLIES
11
SUMMARY OF WATER CHEMISTRY ADVICE AFFECTING WARRANTY
The storage tank and its components are not suitable for certain water chemistries. Those chemistries are
listed below. If the storage tank 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
Total Dissolved Solids (TDS) > 2500 mg/L
storage tank cylinder
Total Dissolved Solids (TDS) not suitable for anode type
storage tank cylinder
Saturation Index (SI) > +0.4
(if an expansion control valve is not fitted)
storage tank cylinder
temperature pressure relief valve

12
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)
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.
Temperature pressure relief valve running
Is the relief valve discharging too much water? Refer to
“Temperature Pressure Relief Valve Running” on page 12.
Thermostat setting
Ensure the thermostat setting of the primary heating source is
appropriate. You may choose to have your electrician 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 or sufficient storage 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.
TEMPERATURE PRESSURE RELIEF VALVE RUNNING
Normal Operation
It is normal and desirable that this valve allows a small quantity of
water to escape during the heating cycle. However, if the
discharge is deemed excessive (more than 2% of hot water used),
there may be another problem.
Continuous dribble
Try gently raising the easing lever on the relief valve for a few
seconds (refer to “Temperature Pressure Relief Valve” 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 storage tank. 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 until storage tank is cold - then stops until water reheats
The primary heating source must be shut down and the energy source isolated. Phone Rheem Service
or their nearest Accredited Service Agent to arrange for inspection.
EXPANSION CONTROL VALVE RUNNING
If an expansion control valve is fitted in the cold water line to the storage tank (refer to page 20)it may
discharge a quantity of water instead of the temperature pressure relief valve on the storage tank. The benefit
is that energy is conserved as the discharged water is cooler.
IF YOU HAVE CHECKED ALL THE FOREGOING AND STILL BELIEVE YOU NEED ASSISTANCE,
PHONE RHEEM SERVICE OR THEIR NEAREST ACCREDITED SERVICE AGENT

13
INSTALLATION
THIS STORAGE TANK IS NOT SUITABLE FOR POOL HEATING
INSTALLATION STANDARDS
The storage tank must be installed:
by a qualified person, and
in accordance with the installation instructions, and
in compliance with Standard AS/NZS 3500.4 and all local codes and regulatory authority requirements.
In New Zealand the installation must also conform to the New Zealand Building Code.
All packaging materials must be removed from the storage tank prior to its installation. This includes the
removal of the cardboard base of the carton from the underside of the storage tank.
STORAGE TANK APPLICATION
This storage tank is designed for the purpose of storing heated potable water. Its use in an application other
than this may shorten its life.
If this storage tank 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 storage tank 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: AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in
potable water.
If this storage tank is installed as part of a solar water heater to an in-series storage water heater, then this
requirement of AS 3498 can be satisfied provided the storage water heater is energised and the thermostat
setting is 60°C or higher.
If this storage tank is installed as part of a solar water heater to an in-series continuous flow gas booster, then
this requirement of AS 3498 can be satisfied provided the booster is energised, its preset outlet temperature
setting is 70°C or higher and a remote temperature controller is not used.
STORAGE TANK LOCATION
This storage tank is suitable for either outdoor or indoor installation. Whether located outdoor or indoor, the
storage tank should be installed either close to the most frequently used outlets or with a circulated flow and
return system, and its position chosen with safety and service in mind.
Clearance must be allowed for servicing of the storage tank. The
storage tank must be accessible without the use of a ladder or scaffold.
Make sure the temperature pressure relief valve lever is accessible and
the thermostat (Tankstat) if fitted can be removed for service.
You must be able to read the information on the rating plate. If possible
leave headroom of one storage tank height so the anode can be
inspected or replaced. Remember you may have to take the entire
storage tank out later for servicing.
The storage tank 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 storage tank 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 storage tank.

INSTALLATION
14
Note: The storage tank should not be placed in direct contact with a concrete surface that is less than two
months old and not fully cured as this may attack the metal coating of the storage tank base. A moisture
barrier should be used between the two surfaces in this instance.
Remember all local authorities have regulations about putting storage tanks into roof spaces.
For a single storage tank installation, follow the diagram on page 19. For multiple storage tank installations
follow the instructions on pages 24 to 29.
SAFE TRAY
Where damage to property can occur in the event of the storage tank
leaking, the storage tank 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. AS/NZS 3500.4 also has particular requirements when a
safe tray must be installed.
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 installation diagram (refer to installation diagram
on page 20).
Model
340, 430
Relief valve setting
1000kPa
Expansion control valve setting*
850kPa
Max. mains supply pressure
With expansion control valve
680kPa
Without expansion control valve
800kPa
* Expansion control valve not supplied with storage tank
TANK WATER SUPPLY
If the storage tank 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 storage tank. Care must be taken to avoid air locks. The cold water line to the storage
tank should be adequately sized and fitted with a full flow gate valve or ball valve. Consideration must be
given to any minimum water supply pressure requirements of water heater(s) which are part of the hot water
plumbing system.

INSTALLATION
15
HOT WATER DELIVERY
This storage tank can deliver water at temperatures which can cause scalding.
It is necessary and we recommend that a temperature limiting device be fitted between the storage tank and
the hot water outlets in any ablution and public areas such as bathrooms, ensuites or public amenities to
reduce the risk of scalding. The installing plumber may have a legal obligation to ensure the installation of this
storage tank meets the delivery water temperature requirements of AS/NZS 3500.4 so that scalding water
temperatures are not delivered to a bathroom, ensuite, or other ablution or public area.
Where a temperature limiting device is installed adjacent to the storage tank, the cold water line to the
temperature limiting device can be branched off the cold water line either before or after the isolation valve
and pressure limiting valve to the solar storage tank, but it MUST BE before the non-return valve. If an
expansion control valve is required, it must always be installed after the non-return valve and be the last valve
prior to the solar storage tank.
Warning: A non-return valve MUST BE installed on the cold water line to the solar storage tank AFTER
the cold water branch to a temperature limiting device.
If a combination isolation valve and non-return valve (duo or trio valve) is installed on the cold water line to
the storage tank and the cold water line to the temperature limiting device branches off after this valve, then a
second non-return valve must be installed between the cold water branch and the solar storage tank.
If a pressure limiting valve is installed on the cold water line to the storage tank and the cold water line to a
temperature limiting device branches off before this valve or from another cold water line in the premises,
then a pressure limiting valve of an equal pressure setting may be required prior to the temperature limiting
device.
LEGEND
Two Temperature Zones Using a Temperature Limiting Device

INSTALLATION
16
CIRCULATED HOT WATER FLOW AND RETURN SYSTEM
If a storage tank is used with a primary water heating source and is to be installed as part of a circulated hot
water flow and return system, the primary heating source must be able to provide a hot water outlet
temperature of at least 60°C.
If a storage tank is used as part of a solar water heater, it should not be installed as part of a circulated hot
water flow and return system in a building, unless the system and control system is specifically designed for
this. Otherwise, the benefits of solar gain will be significantly reduced and energy gained from the sun lost
through the pipe work.
If a circulated flow and return system is required, it is necessary to connect the flow and return lines to the in-
series booster water heater, not the solar storage tank. The in-series booster water heater makes up for the
pipe heat loss in the flow and return system and must be able to provide a hot water outlet temperature of at
least 60°C.
Note: The thermostat or preset outlet temperature of the primary heating source or in-series booster water
heater must always be set to at least 60°C.
Refer to the diagram Circulated Hot Water Flow and Return System Storage Tank with Primary Water Heater
on page 16.
Temperature Limiting Device
A temperature limiting device cannot be installed in circulated hot water flow and return pipe work unless it is
specifically designed to do so, such as the Rheem Guardian warm water system.
The tempered water from a temperature limiting device cannot be circulated. Where a circulated hot water
flow and return system is required in a building, a temperature limiting device can only be installed on a dead
leg, branching off the circulated hot water flow and return pipe.
If circulated tempered water were to be returned back to the water heater or storage tank, depending on the
location of the return line connection on the water supply line to the water heater or storage tank, then either:
water will be supplied to the cold water inlet of the temperature limiting device at a temperature
exceeding the maximum recommended water supply temperature, or
when the hot taps are closed no water will be supplied to the cold water inlet of the temperature limiting
device whilst hot water will continue to be supplied to the hot water inlet of the temperature limiting
device.
These conditions may result in either water at a temperature exceeding the requirements of AS/NZS 3500.4
being delivered to the hot water outlets in the ablution areas, or the device closing completely and not
delivering water at all, or the device failing. Under either condition, the operation and performance of the
device cannot be guaranteed.
LEGEND
Circulated Hot Water Flow and Return System
Storage Tank with Primary Water Heater

INSTALLATION
17
REDUCING HEAT LOSSES
The cold water line to, primary flow and return lines and the hot water line from the storage tank must be
insulated in accordance with the requirements of AS/NZS 3500.4. The insulation must be weatherproof and
UV resistant if exposed.
Keep temperature settings down. Lower temperatures reduce heat losses and prolong cylinder life. Do not
set the controlling thermostats on the primary heating plant above 70°C unless it is necessary.
ANODE
The vitreous enamel lined cylinder of the storage tank is only covered by the Rheem 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 storage tank, any resultant faults will not be covered
by the Rheem warranty. In addition, the use of an incorrect colour coded anode may shorten the life of the
storage tank cylinder.
The correct colour coded anode for the water supply being used must be selected and fitted to the storage
tank for the Rheem warranty to apply to storage tank cylinder (refer to “Water Supplies” on page 9 and the
Anode Selection chart on page 9). The black anode is typically fitted as standard.
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)
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
storage tank during long periods of no use. In areas where this is likely to occur, the installer should instruct
the householder on how to dissipate the gas safely (refer to “Caution” on page 10).
SADDLING PIPE WORK
To prevent damage to the cylinder when attaching pipe clips or saddles to the storage tank 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 storage tank.
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.

INSTALLATION
18
DIMENSIONS AND TECHNICAL DATA
Model
610 340 50
610 430 50
Storage Capacity
litres
325
410
Hot Water Delivery
litres
315
400
Maximum Storage Temperature
°C
82
82
Nominal Dimensions (mm) A
mm
1640
1840
B
mm
640
690
C
mm
640
690
D
mm
1298
1482
E
mm
115
108
H
degrees
32
30
J
degrees
90
84
N
mm
290
273
Weight empty
kg
87
111
Manifold - minimum centre to centre
mm
900
940
Technical data is subject to change.

INSTALLATION
19
TYPICAL INSTALLATION –OUTDOOR LOCATION
OUTDOOR LOCATIONS
INDOOR LOCATIONS
TYPICAL INSTALLATION –INDOOR LOCATION
OUTDOOR LOCATIONS
INDOOR LOCATIONS

20
CONNECTIONS –PLUMBING
All plumbing work must be carried out by a qualified person and in accordance with the Standard
AS/NZS 3500.4 and all local codes and regulatory authority requirements. In New Zealand the installation
must also conform to the New Zealand Building Code.
CONNECTION SIZES
Hot water connection: Rp 2.
Cold water connection: Rp 2.
Primary flow / return connection: Rp 2.
Relief valve connection: Rp 3/4.
WATER INLET AND OUTLET
All pipe work must be cleared of foreign matter before
connection and purged before attempting to operate the
storage tank. All olive compression fittings must use brass
or copper olives. Use an approved thread sealant such as
Teflon tape on all other threaded joints.
An isolation valve and non-return valve must be installed
on the cold water line to the storage tank. An acceptable
arrangement is shown in the diagram and on pages 26
or 30 for multiple installations. Refer also to “Hot Water
Delivery” on page 15 and to “Mains Water Supply” on
page 14.
A disconnection union must always be provided at the cold
water inlet, primary flow / return connection and hot water
outlet on the storage tank to allow for disconnection of the
storage tank.
This storage tank has either a plastic dip tube or fitting liner
in the inlet and outlet fittings (see diagram). These must be
in place for the storage tank to function properly. Do not
remove or damage them by using heat nearby. They will be
pushed into the correct position as the fitting is screwed in.
PIPE SIZES
The pipe sizing of hot water supply systems for commercial installations should be carried out by persons
competent to do so, choosing the most suitable pipe size for each individual application. Reference to the
technical specifications of the primary heating source, storage tank and local regulatory authority
requirements must be made.
TEMPERATURE PRESSURE RELIEF VALVE
The temperature pressure relief valve is shipped in a plastic bag attached to the storage tank. The
temperature pressure relief valve must be fitted before the storage tank is operated. Before fitting the relief
valve, make sure the probe has not been bent. Seal the thread with an approved thread sealant such as
Teflon tape - never hemp. Make sure the tape does not hang over the end of the thread.
Screw the valve into the correct opening (refer to the installation diagram on page 19)leaving the valve drain
pointing downwards. Do not use a wrench on the valve body - use the spanner flats provided. A copper drain
line must be fitted to the temperature pressure relief valve (refer to "Relief Valve Drain" on page 21).
The valve must be insulated with closed cell polymer insulation or similar (minimum thickness 9 mm) and the
insulation installed so as not to impede the operation of the valve. The insulation must be weatherproof and
UV resistant if exposed.
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