Rheem 511161 Owner's Manual And Installation Instructions
WARNING: Plumber – Be Aware
Use copper pipe ONLY. Plastic pipe MUST NOT be used.
It is a requirement of a solar water heater installation that all pipe work be in copper
and not plastic, due to the effects of high water temperatures and pressures.
Owner’s Guide
and
Installation Instructions
Solar 511161 Storage Tank
This water heater must be installed and serviced by a qualified person.
Please leave this guide with the householder.
WARNING: Plumber – Be Aware
The solar hot and solar cold pipes between the solar storage tank and the solar collectors MUST BE
of copper. All compression fittings must use brass or copper olives.
The full length of the solar hot and solar cold pipes MUST BE insulated.
The insulation must:
be of a closed cell type or equivalent, suitable for a solar water heating application and capable of
withstanding the temperature of the water generated by the solar collectors under stagnation
conditions
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.
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
extend through any penetrations in the eaves, ceiling and roof
cover valves and fittings in the solar pipe work
be fitted up to and cover the connections on both the solar storage tank and the solar collectors.
Note: Failure to observe these requirements also increases the risk of freeze damage.
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.
The insulation is essential to assist in providing freeze protection, will offer protection to a metal roof
against corrosion due to water running off the copper pipes, assist in avoiding accidental contact with
the solar pipe work as very high temperature water can flow from the solar collectors to the solar
storage tank, and also reduce pipe heat losses.
The insulated copper pipe work:
should be fixed at suitable locations to prevent or reduce the possibility of noise from water
hammer and vibration from occurring
is not to be placed or installed in contact with plastic pipe work.
Likewise, plastic pipe work is not to be placed or installed in contact with the insulated copper pipe
work after the collector circuit is installed.
Plastic pipe MUST NOT be used, as it will not withstand the temperature and pressure of the water
generated by the solar collector(s) under stagnation conditions. Extremely high water temperatures of
up to 150°C for non-selective surface collector(s) and greater than 200°C for selective surface
collector(s) and high water pressures exceeding 1000 kPa can be generated under these conditions.
Plastic pipe cannot withstand these temperatures and pressures and MUST NOT be used. Failure of
plastic pipe can lead to the release of high temperature water and cause severe water damage and
flooding.
Plumber: It is important to refer to and read in full the complete
“Warning: Plumber – Be Aware” statement commencing on page 41.
This water heater may be protected by one or more patents or registered designs.
®
Registered trademark of Rheem Australia Pty Ltd.
™ 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
PATENTS
TRADE MARKS
CONTENTS
HOUSEHOLDER – We recommend you read pages 4 to 21.
The other pages are intended for the installer but may be of interest.
About Your Water Heater ............................................................................................................ 4
Maintenance Requirements ...................................................................................................... 12
Water Supplies ........................................................................................................................... 15
Save A Service Call ................................................................................................................... 18
Installation – System ................................................................................................................. 22
Installation – Solar Storage Tank ............................................................................................. 25
Installation – Solar Control Unit ............................................................................................... 34
Installation – Solar Collector(s) ............................................................................................... 37
Connections – Plumbing .......................................................................................................... 43
Connections – Electrical ........................................................................................................... 47
Commissioning .......................................................................................................................... 49
Draining The Water Heater ....................................................................................................... 53
Draining The Solar Collector(s) ............................................................................................... 53
Purging and Flushing The Solar Collector(s) ......................................................................... 54
Warranty ..................................................................................................................................... 58
3
ABOUT YOUR WATER HEATER
WATER HEATER APPLICATION
This water heater is designed for use in a single family domestic dwelling for the purpose of heating potable
water. Its use in an application other than this may shorten its life.
MODEL TYPE
Your Rheem® solar Loline water heater is designed for the solar collector(s) to be roof mounted and the
vitreous enamel lined solar storage tank to be installed at ground or floor level, remotely from the solar
collector(s). The solar storage tank is suitable for installation either outdoor or indoor and with 1 x CSA2612 or
1 or 2 x LCS or 1 or 2 x NPT200 solar collector(s). If an in-series gas booster is mounted to the solar storage
tank, then it is suitable for outdoor installation only.
The system is not suitable for installation above 400 metres altitude.
The system has a level of freeze protection designed to guard the system against
damage from freeze conditions (refer to “Freeze Protection” on page 8). The system must
be installed with the full length of the solar hot and solar cold pipes insulated and power
must be available at the solar control unit to offer protection against freeze damage (refer
to “Warning: Plumber – Be Aware” on page 41). Freeze conditions occur below 6°C.
Note: The Rheem warranty against freeze damage applies only to systems installed in
Australia.
The system has NO WARRANTY for freeze damage when installed above 400 metres
altitude or if the solar hot and solar cold pipes are not insulated in accordance with the
installation instructions or if power is not available at the solar control unit (refer to “Terms
of the Rheem Warranty” on page 58).
This solar water heater is designed to be installed with a Rheem continuous flow
874 series 20 or 26 litre in-series gas booster either mounted onto the storage tank or
installed remotely, or a Rheem 874 series 27 litre in-series gas booster installed remotely.
The solar water heater may be installed with another suitable type of remotely installed
in-series continuous flow or storage booster. If the in-series water heater is other than a
Rheem continuous flow 874 series 20 or 26 or 27 litre in-series gas booster, then the
references to the in-series gas booster in this guide may not be applicable to the
installation.
For information relating to the function and operation of the in-series water heater, refer
to the Owner’s Guide and Installation Instructions supplied with the water heater.
MAINS PRESSURE
The water heater 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 25, a pressure limiting valve must be
fitted. The supply pressure should be greater than 350 kPa for true mains pressure operation to be achieved.
A minimum water supply pressure of 200 kPa is required to enable the solar circulator and solar circuit system
to operate effectively.
SOLAR OPERATION
The operation of the circulator is controlled by the combination of:
the hot sensor located at the outlet of the solar collectors.
The hot sensor measures the water temperature at the outlet of the solar collectors.
the cold sensor located at the solar cold outlet at the base of the solar storage tank
The cold sensor measures the water temperature at the bottom of the solar storage tank.
the differential controller located in the solar control unit.
4
ABOUT YOUR WATER HEATER
Normal operation
As the sun heats the water in the solar collectors, the increase in temperature activates the circulator. The
circulator switches on whenever the water in the solar collectors is hotter than the water in the solar storage
tank. The circulator moves the hotter water from the solar collectors through the solar hot pipe to the solar
storage tank and the cooler water from the solar storage tank is circulated to the solar collectors via the solar
cold pipe to be heated by the sun’s energy.
This process continues whilst solar energy is available and the water in the solar storage tank requires heating.
The circulator will deactivate when the water temperature in the solar storage tank is around 65°C to 75°C.
The water heater will then enter Over-temperature operation.
During normal operation if the amount of solar energy available reduces, such as when the sky becomes very
cloudy or the sun becomes lower in the sky in the late afternoon, and the water no longer gains useable heat
from the solar collectors, the circulator will deactivate. The water heater will then enter standby mode.
Over-temperature operation
The purpose of the Over-temperature operation is to reduce the amount of overheating or ‘stagnation’ of water
in the solar collectors. When the water in the solar storage tank has reached 65°C to 75°C and the circulator
has deactivated, the solar collectors will continue to gain heat while solar energy is still available.
If the water in the solar collectors stagnates and its temperature becomes very high, the circulator will activate
for a short period to transfer this extra energy to the solar storage tank. The circulator will deactivate when the
water temperature in the solar collectors decreases. This process will either repeat for a maximum of six cycles
or until the water temperature in the solar storage tank reaches around 75°C to 80°C or the hot sensor does
not sense another increase in water temperature to a stagnation level after a cycle is completed, i.e. the solar
energy available reduces.
Night Time Cooling operation
The purpose of Night Time Cooling operation is to rid the solar storage tank of excess solar energy gained by
Over-temperature operation during that day. The desired water temperature in the solar storage tank is to be
between 60°C to 70°C.
If the solar control unit has entered Over-temperature operation during the day, then after the water
temperature in the solar collectors reduces later in the day or early evening, the circulator will activate. Water
from the solar storage tank will circulate through the solar collectors and excess heat in the water will radiate
from the solar collectors reducing the temperature of the water. The water will circulate for a period of time and
until the water temperature in the solar storage tank is around 60°C to 70°C. The water heater will then enter
standby mode.
Freeze Protection operation
The purpose of Freeze Protection operation is to prevent freezing of water in the solar collectors and solar
pipe work in very cold conditions. The water in the solar collectors will cool during periods of no solar gain. In
very cold conditions, such as overnight and very early in the morning before sunrise, the water temperature
can approach freezing point.
If the hot sensor measures that the water temperature in the solar collectors is approaching freezing, the
circulator will activate. Water from the solar storage tank, containing more energy than the water in the solar
collectors, will circulate through the solar collectors keeping the water temperature above freezing point. The
circulator will remain on for some minutes and until the hot sensor measures a water temperature at a safe
level above freezing. When both of these conditions are met, the circulator will deactivate. The water heater
will then enter standby mode.
This process will repeat whenever the hot sensor measures that the water temperature in the solar collectors
is approaching freezing.
The anti-freeze heating unit in a frost element model will turn on when the circulator activates and the cold
sensor measures a very low water temperature at the bottom of the solar storage tank. The purpose of the
anti-freeze heating unit is to provide additional energy to the water to assist in the prevention of freezing in the
solar pipe work and solar collectors. The anti-freeze heating unit will turn off when either the water temperature
has risen by a few degrees or the circulator deactivates. The water heater will then enter standby mode.
Refer to “Freeze Protection” on page 8 and “Warning: Plumber – Be Aware” on page 41.
5
ABOUT YOUR WATER HEATER
Mode
Green LED
Red LED
power on* > 48 hours
power on* < 48 hours
Normal operation
rapid pulse
3 flashes
off **
Over-temperature operation
rapid pulse
3 flashes
off, or solid then off
Night Time Cooling operation
rapid pulse
3 flashes
off
Freeze Protection operation
rapid pulse
3 flashes
off
Standby mode
solid
slow pulse
off
Notes
* Power from the GPO to the solar control unit.
** In Normal Operation the red LED may emit a rapid pulse for a short period of time under certain
circumstances (refer to “Rapid Pulsing” on page 20).
typical maximum
temperature from solar gain
maximum recommended
supply temperature to
bathrooms and ensuites
Standby mode
The water heater will be in Standby mode whenever conditions are not favourable for solar heating in Normal
operation, and Over-temperature operation and Night Time Cooling are not required or have been completed,
and conditions are not cold enough for or in-between Freeze Protection operation.
Solar Monitor LED operation
The LEDs on the Solar Monitor, located on the side of the solar control unit, operate to show the operational
mode of the water heater. Refer also to “Solar Monitor” on page 9.
HOW HOT SHOULD THE WATER BE?
The solar control unit will circulate water through the solar collector(s)
until a temperature of 70°C to 80°C is reached in the solar storage
tank.
During periods of low solar energy gain, the continuous flow in-series
gas booster will boost the water temperature automatically to its
preset outlet temperature setting, or to the temperature setting of
another type of in-series booster water heater.
The factory preset outlet temperature setting of the in-series gas
booster is:
874 series 20 litre, 26 litre, 27 litre models 60°C
Note: The preset outlet temperature setting of a continuous flow inseries gas booster cannot be adjusted by the householder. The
setting can only be adjusted by the installer, Rheem Service or their
nearest Accredited Service Agent.
Note: AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in
potable water. If this water heater is installed with 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 or an EZiSET kit is not used.
If this water heater is installed with an in-series storage booster, then this requirement of AS 3498 can be
satisfied provided the storage booster is energised and its thermostat setting is 60°C or higher.
Warning: Temperature controllers or an EZiSET kit must not be fitted to the in-series water heater as part
of a solar water heater system because water at a temperature much higher than the controller or EZiSET
setting can be delivered.
6
ABOUT YOUR WATER HEATER
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.
We recommend and it may also be required by regulations that an approved temperature limiting device be
fitted into the hot water pipe work to the bathroom and ensuite when this water heater is installed. This will
keep the water temperature below 50°C at the bathroom and ensuite. The risk of scald injury will be reduced
and still allow hotter water to the kitchen and laundry.
SAFETY
This water heater is supplied with a thermostat, an over-temperature energy cut-out, temperature sensors 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 operation of the over-temperature cut-out on the thermostat indicates a possibly dangerous situation. If
the over-temperature cut-out operates, it must not be reset and the water heater must be serviced by a qualified
person.
If the power supply cord or plug to the solar control unit or the electrical conduit to the solar storage tank is
damaged, it must be replaced by a qualified person in order to avoid a hazard. The power supply cord and
plug must be replaced with a genuine replacement part available from Rheem. Phone Rheem Service or their
nearest Accredited Service Agent to arrange for an inspection.
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.
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.
This water heater uses 240 V AC electrical power for operation of the control systems and the electrically
operated components. The removal of the front cover or solar control unit cover will expose 240 V AC
wiring. It must only be removed by a qualified person.
The power lead from the solar controller must be plugged into a weatherproof electrical outlet if installed
outdoors. Take care not to touch the power plug with wet hands.
Do not touch any exposed pipe work or fittings connecting the solar storage tank and the solar collector(s),
as this may result in a burn injury. Very high temperature hot water and in some circumstances high
temperature steam can be generated by the solar collector(s) under certain conditions and this flows
through the pipe work from the solar collector(s) to the solar storage tank.
Note: Any exposed pipe work or fittings in the collector circuit should be attended to and covered with
insulation. Phone Rheem Service or their nearest Accredited Service Agent to arrange for an inspection.
For continued safety of this water heater it must be installed, operated and maintained in accordance with
the Owner’s Guide and Installation Instructions.
Do not modify this water heater.
7
ABOUT YOUR WATER HEATER
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 12 and to “Anode Inspection and Replacement” on page 16.
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 a plumber or specifier about your needs and building back-up
redundancy into your hot water supply system.
FREEZE PROTECTION
The system has a level of freeze protection designed to guard the system against damage from freeze
conditions. The system must be installed with the full length of the solar hot and solar cold pipes insulated and
power must be available at the solar control unit to offer protection against freeze damage (refer to “Warning:
Plumber – Be Aware” on page 41). Freeze conditions occur below 6°C.
Note: The Rheem warranty against freeze damage applies only to systems installed in Australia.
The system has NO WARRANTY for freeze damage when installed above 400 metres altitude or if the solar
hot and solar cold pipes are not insulated in accordance with the installation instructions or if power is not
available at the solar control unit (refer to “Terms of the Rheem Warranty” on page 58).
The anti-freeze control is designed to recirculate a small amount of water from the solar storage tank through
the solar pipe work and solar collector(s) during periods of low temperatures. This is to prevent the water inside
the pipe work and solar collector(s) from freezing. It is essential the electrical circuit to the solar control unit is
continually turned on if there is a risk of freezing. The Rheem warranty does not cover damage caused by
freeze conditions when the electrical circuit to the solar control unit is turned off or interrupted.
Additional freeze protection is provided by the anti-freeze heating unit. The anti-freeze heating unit is for
heating the water at the bottom of the solar storage tank at times of low cold water temperature. The antifreeze heating unit provides additional energy to the water to assist in the prevention of freezing in the solar
pipe work and solar collector(s). The anti-freeze heating unit is controlled by the solar controller and will only
be energised when the water temperature is very low and the circulator activates in the Freeze Protection
operation mode. The water temperature is monitored by the cold sensor.
If the water temperature at the bottom of the solar storage tank is very low when the circulator activates in the
Freeze Protection operation mode, the anti-freeze heating unit will be energised and will heat the water by a
few degrees. The anti-freeze heating unit will be de-energised when either the frost mode is shut down or the
water temperature has risen by a few degrees.
The anti-freeze heating unit is supplied with power from the solar control unit. The power outlet to the solar
control unit must be switched on for the anti-freeze heating unit to operate and offer additional freeze
protection.
An over-temperature energy cut-out is incorporated in a thermostat which is mounted on the solar storage tank
behind the front cover.
Notes:
The system is not covered for freeze damage above 400 metres altitude.
The freeze protection system will be rendered inoperable if electrical power is not available at the solar
control unit. Damage caused by freezing due to no power at the solar control unit, is not covered by the
Rheem warranty.
If it is necessary to switch the power off to the solar control unit and there is a risk of freezing, then it is
necessary to have a plumber drain the solar collector(s) and solar hot and solar cold pipes.
Refer to “Terms of the Rheem Warranty” on page 58.
8
ABOUT YOUR WATER HEATER
Flashes
Operational Modes
Flashes
Indicator or Fault Modes
solid green
(remains on)
Standby mode
solid red
(remains on)
Hot sensor temperature
greater than 130°C
green
slow pulse
Standby mode
(power on for less than 48 hours)
red
rapid pulse
Temperature rise across collector
greater than 45°C
(circulator at full speed)
green
rapid pulse
Circulating water through collectors
3 x red
Hot sensor in collector – short circuit
3 x green
Circulating water through collectors
(power on for less than 48 hours)
4 x red
Hot sensor in collector – open circuit
no green
(remains off)
Power outage or call for service
5 x red
Cold sensor –short circuit
6 x red
Cold sensor – open circuit
SOLAR MONITOR
A solar monitor is located on the side of the solar control unit and houses a green and a red LED.
The green LED, marked “Solar”, indicates the current operational mode of the solar water heater and the red
LED, marked “Attention”, may indicate a potential fault mode.
The green LED will emit either a constant glow, a constant
pulsing or a series of flashes, with a two (2) second interval
between each series.
The red LED will emit either a constant glow, a constant
pulsing or a series of flashes with a two (2) second interval
between each series. A constant glow or pulsing does not
necessarily mean there is a fault with the system. A series of
flashes indicates there may be a particular fault condition with
the system.
The modes are:
If the power supply to the solar control unit is on and the green LED is off or the red LED is flashing, this
indicates there may be a fault with the water heater. The red LED may emit from three (3) to six (6) flashes in
each series of flashes. A constant glow or pulsing of the red LED does not necessarily mean there is a fault
with the system.
Notes:
If the system is in standby mode with the green LED emitting either a constant glow or slow pulsing flashes
(circulator is off) and the solar storage tank is full of hot water, the red LED may simultaneously emit a
constant glow if solar radiation is still being received by the solar collectors. This does not indicate a fault.
The red LED will go out when the temperature in the solar collectors decreases.
During periods of high solar radiation and the circulator activates after having been off (the green LED will
emit either a rapid pulse or a series of three flashes), it is possible the red LED may simultaneously emit
a rapid pulse for a period of up to ten (10) minutes. This does not indicate a fault.
If the red LED continues to emit a rapid pulse for longer than ten (10) minutes, or emits a series of flashes,
then count the number of flashes and phone Rheem Service or their nearest Accredited Service Agent to
arrange for an inspection.
9
ABOUT YOUR WATER HEATER
TO TURN OFF THE WATER HEATER
If you plan to be away from home for 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 to the solar control unit at the power outlet (refer to the notes below).
Close the cold water isolation valve at the inlet to the water heater.
Refer to the Owner’s Guide and Installation Instructions supplied with the in-series water heater for the
procedure to turn off the in-series water heater.
Notes:
The freeze protection system will be rendered inoperable if electrical power is not available at the solar
control unit. Damage caused by freezing due to no power at the solar control unit is not covered by the
Rheem warranty. Refer to “Terms of the Rheem Warranty” on page 58.
If there is a risk of freezing, the electrical supply to the solar control unit should not be switched off unless
the solar collector(s) and solar hot and solar cold pipes are drained, otherwise damage could result (refer
to “Freeze Protection” on page 8).
TO TURN ON THE WATER HEATER
Open the cold water isolation valve fully at the inlet to the water heater.
If the solar collector(s) and solar hot and solar cold pipes have been drained, it will be necessary to have
a plumber purge the collector circuit of air.
If the electrical supply to the water heater has been switched off:
Switch on the electrical supply to the solar control unit at the power outlet.
The power outlet must be switched on for the solar control unit to operate and solar gain to be achieved
and for the anti-freeze heating unit to operate and offer additional freeze protection.
Refer to the Owner’s Guide and Installation Instructions supplied with the in-series water heater for the
procedure to turn on the in-series water heater.
GOING ON HOLIDAYS
It is not necessary to switch off the electrical supply at the power outlet to the solar control unit. Refer to “To
Turn Off The Water Heater” on page 10. Also if the system is not used for a period in excess of four (4) weeks
it is recommended the solar collector(s) be covered.
HOW DO I KNOW IF THE WATER HEATER IS INSTALLED CORRECTLY?
Installation requirements are shown on pages 25 to 32. The water heater must be installed:
by a qualified person, and
in accordance with the installation instructions, and
in compliance with Standards AS/NZS 3500.4 or AS/NZS 3500.5:2012 Section 3 (for a Class 1a or
Class 10 building) as applicable under the Plumbing Code of Australia, AS/NZS 3000, and either AS 5601
or AS/NZS 5601.1 as applicable under local regulations, and all local codes and regulatory authority
requirements.
Warning: Temperature controllers or an EZiSET kit must not be fitted to the in-series water heater as part
of a solar water heater system because water at a temperature much higher than the controller or EZiSET
setting can be delivered.
Refer also to “Warning: Plumber – Be Aware” on page 41.
10
ABOUT YOUR WATER HEATER
VICTORIAN CUSTOMERS
Notice to Victorian Customers from the Victorian Plumbing Industry Commission. This water heater must be
installed by a licensed person as required by the Victorian Building Act 1993.
Only a licensed person will give you a Compliance 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, the solar collectors, components and fittings. Refer to “Water Supplies”
on page 15.
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 15 to 17.
HOW LONG WILL THE WATER HEATER LAST?
The water heater is supported by a manufacturer’s warranty (refer to page 58). 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 8.
11
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 you raise and lower
the lever gently. Refer to “Temperature Pressure Relief Valve” on page 13.
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 14.
Check the drain line from the safe tray (if one is installed) is not blocked.
Check the status of the LEDs. The green LED should be illuminated (either solid, pulsing or flashing). The
red LED should be off. Refer to “Solar Monitor” on page 9 and “Household Maintenance Around the Solar
Storage Tank” on page 14.
It is important to ensure the solar controller and circulator are operating correctly, particularly at the onset
of the colder winter season. Solar gain will not be achieved and the freeze protection system will be
rendered inoperative if the solar controller or circulator are not operating.
If this solar storage tank is installed with an integrated or remotely installed Rheem in-series continuous flow
gas booster, it is recommended minor maintenance be performed every six months on the gas booster by the
dwelling occupant. Another type of in-series booster may have its own recommended minor maintenance
schedule. Refer to the Owner’s Guide and Installation Instructions supplied with the booster water heater for
information regarding its recommended maintenance.
MAJOR SERVICE EVERY FIVE YEARS
It is recommended a major service be conducted on the water heater every five (5) years. If an anode
replacement is conducted sooner than a major service, then the major service should coincide with the
replacement.
Warning: Servicing of a water heater 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 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.
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 16).
Check the electric heating unit for excessive calcium build-up or corrosion and replace if necessary.
Check the solar control unit for correct operation.
Flush and bleed the solar collectors.
Clean the collector glass.
12
MAINTENANCE REQUIREMENTS
water
heater
drain
line
lift until water
flows from the
drain line –
lower gently
Check the insulation on the solar hot and solar cold pipes. If required, insulate exposed pipe work and
repair or replace degraded insulation.
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 solar storage tank may need to be drained during this service. After the completion of the service,
the solar storage tank will take some time to reheat the water by solar gain.
If this solar storage tank is installed with an integrated or remotely installed Rheem in-series continuous flow
gas booster, then for the booster’s safe and efficient operation, it is recommended a major service be
conducted on the gas booster every five (5) years. Another type of in-series booster may have its own
recommended service schedule. Refer to the Owner’s Guide and Installation Instructions supplied with the
booster water heater.
TEMPERATURE PRESSURE RELIEF VALVE
This valve is near the top of the water heater 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 19).
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 (6) months. Refer to “Minor
Maintenance Every Six Months” on page 12. It is very
important the lever is raised and lowered gently.
DANGER: Failure to do this may result in the water
heater cylinder failing, or under certain circumstances,
exploding.
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 water heater must be checked.
Phone Rheem Service or their nearest Accredited Service
Agent to arrange for an inspection.
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 15).
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MAINTENANCE REQUIREMENTS
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 (6) months. Refer to “Minor
Maintenance Every Six Months” on page 12. 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.
COLLECTOR GLASS
Ensure the glass on your solar collector(s) is free of dust, salt spray or any other matter which may reduce the
effectiveness of the solar collector(s). Rainfall should keep the collector adequately clean. It is recommended
the collector glass be washed clean at least every three months should adequate rain not have fallen in this
period.
Collector glass can be hosed down or if the solar collector(s) is accessible such as on a trafficable roof, wash
the collector glass with water and a soft brush when the solar collector(s) is cool, such as early in the morning.
In extremely dusty areas extra attention may need to be given to keeping the collector glass clean.
Have any trees trimmed which may shade the solar collector(s).
Rheem solar collectors have passed the AS/NZS 2712 requirements for resistance to hailstone damage, so it
is not normally necessary to fit a guard to a collector. Stone Guards are available for the LCS and NPT200
solar collectors to provide a level of protection to the collectors against vandalism or accidental damage.
Contact Rheem or your local Rheem Solar Water Heater Distributor for details.
HOUSEHOLD MAINTENANCE AROUND THE SOLAR STORAGE TANK
Care should be taken when conducting general household maintenance, such as lawn mowing and grass
cutting, around the solar storage tank. Careless use of devices such as a whipper snipper could damage or
cut a sensor lead, or electrical cable or conduit.
If a sensor lead, or electrical cable or conduit is damaged or cut, solar contribution may not be achieved and
the freeze protection system may be rendered inoperative. In addition, if the electrical cable or conduit has
been damaged or cut, wiring may be exposed leading to a dangerous situation.
On a regular basis, inspect around the water heater for insect infestations, such as ants. Insects may look for
a warm place to nest, particularly in wet weather. Insects encroaching into or nesting in the water heater and
the solar control unit can interfere with the operation of the water heater and also damage components. Spray
insecticide around the water heater if necessary to rid the area of insects.
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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)
(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
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. 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 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 water heater cylinder, a temperature pressure relief valve, a heating unit and a
solar collector in an open circuit solar water heater system.
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 water heater 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 water heater, 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
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 15 for the Rheem warranty to apply to the water heater cylinder.
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.
15
WATER SUPPLIES
ANODE INSPECTION AND REPLACEMENT
The anode installed in this 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 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 12) then the maximum time after installation when the anode should be replaced for this water
heater is eight (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 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 Rheem warranty does not
apply to a copper sheathed heating unit or to a solar collector in an open circuit solar water heater system. A
corrosion resistant heating unit must be used for the Rheem warranty to apply to the 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 the
temperature pressure relief valve and water heater cylinder. Solar collectors in an open circuit solar water
heater system should be covered when the water heater is not intended to be used for more than four (4)
weeks.
Where the saturation index exceeds +0.80, the Rheem warranty does not apply to a standard watts density
heating unit or to a solar collector in an open circuit solar water heater system. 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.
Refer to the Saturation Index chart on page 17.
Contact Rheem Service or their nearest Accredited Service Agent if a replacement heating unit is required.
Refer to the cold water connection detail on page 43 for the position of the expansion control valve.
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WATER SUPPLIES
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
solar collector
copper sheathed heating unit
Saturation Index (SI) > +0.4
(if an expansion control valve is not fitted)
water heater cylinder
temperature pressure relief valve
Saturation Index (SI) > +0.8
solar collector
standard watts density heating unit
very corrosive very scalingscaling
corrosive
+0.4 +0.80-1.0
no warranty applies
to a:
temperature pressure relief valve
or a water heater cylinder unless
an expansion control valve is fitted.
no warranty applies
to a:
-copper sheathed heating unit
-direct (open circuit) solar collector
SATURATION INDEX (SI)
SOLAR WATER HEATERS WITH ELECTRIC HEATING UNIT
WITHIN WARRANTY
SPECIFICATION
SATURATION INDEX
(calculated @ 80°C water temperature)
no warranty applies
to a:
-standard watts density heating unit
-direct (open circuit) solar collector
SUMMARY OF WATER CHEMISTRY ADVICE AFFECTING WARRANTY
The water heater, solar collectors and their 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:
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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)
Insufficient sunlight
Insufficient sunlight due to cloudy weather during hotter months or low solar energy contribution in colder
months may mean the in-series water heater operates more often.
Solar Control Unit
Check the power supply cord is plugged in and the power outlet switched on.
Is power available in the house? Try using another electrical appliance.
Green LED is off or red LED is flashing on Solar Monitor
If the green LED is off or the red LED is flashing on the Solar Monitor
label, there may be a problem with the solar water heater operation and
solar gain is not being achieved. This will result in the in-series gas
booster operating to provide all of the hot water required.
Switch off the electrical supply at the power outlet to the solar control
unit for a few seconds, then switch on again.
If the green LED remains off or the red LED recommences to flash, then
count the number of flashes and phone Rheem Service or their nearest
Accredited Service Agent to arrange for an inspection.
Collector(s) shaded
If trees or other objects shade the solar collector(s) or if the glass is dirty, the effectiveness of the solar
collector(s) will be greatly reduced.
Have the trees trimmed or the solar collector(s) relocated if the obstruction is permanent or clean the
collector glass.
Refer to “Collector Glass” on page 14.
Collector area is too small
For most installations, the number of solar collector(s) recommended in Rheem literature has been proven
to provide the required solar energy to meet the average family needs. However, in some circumstances,
it may be possible to install a second LCS or NPT200 solar collector.
Air in collector(s) (no solar gain)
It is possible under certain conditions, such as when the pipe work has been opened, that air may become
trapped in the solar collector(s). This will prevent the circulator from moving water around the collector
circuit. Have a plumber purge the collector circuit of air.
Are you using more hot water than you think?
Is one outlet (especially the shower) 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 family’s hot water usage. As you have installed an energy saving appliance, energy saving should
also be practised in the home. Adjust your water usage pattern to take advantage of maximum solar gains.
Have a plumber install 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 19.
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