Rheem 265, 275 User Manual
Owners Guide
and
Installation Instructions
Gas Heavy Duty
Water Heater
265 Litre and 275 Litre Models
This water heater must be installed and serviced by an authorised person.
Please leave this guide with a responsible officer.
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.
Warning: Upon completion of the installation and commissioning of the
water heater, leave this guide with the householder or responsible officer.
DO NOT
leave this guide inside of the cover of the water heater, as it may
interfere with the safe operation of the water heater or ignite when the water
heater is turned on.
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.
PATENTS
CONTENTS
RESPONSIBLE OFFICER - We recommend you read pages 4 - 14.
The other pages are intended for the installer but may be of interest.
How Your Water Heater Works...................................................8
Regular Care ................................................................................9
Save A Service Call ...................................................................11
Installation..................................................................................15
Connections – Plumbing ..........................................................25
Connections – Electrical...........................................................28
Multiple Installations.................................................................32
Commissioning..........................................................................37
Lighting The Water Heater........................................................39
Draining The Water Heater .......................................................42
Temperature Control.................................................................43
Water Supplies...........................................................................4 6
Warranty.....................................................................................47
3
ABOUT YOUR WATER HEATER
MODEL TYPE
Congratulations for choosing a Rheem
model you have chosen is either a 265 litre or 275 litre indoor or outdoor quick
recovery water heater.
HOW HOT SHOULD THE WATER BE?
The water heater has a maximum
temperature setting of 82°C and a minimum
temperature setting of 60°C. Refer to
“Temperature Adjustment” on page 4.
For applications requiring sanitising
temperatures, the thermostat should be set
at 82°C. Note: For temperatures above
80°C, a circulator must be installed.
To meet the requirements of the National
Plumbing Standard the temperature of the
stored water must not be below 60°C.
If this water heater is installed as an in-series booster water heater as part of a
commercial solar water heating system, to maximise solar contribution it is
recommended the thermostat is set at 60°C, unless sanitising temperatures are
required.
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 bathing
and public areas when this water heater is installed. This will keep the water
temperature below 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
The water heater features an electronic adjustable thermostat. We recommend
only a licensed tradesperson make any temperature adjustments. We advise
the thermostat be adjusted to the lowest temperature setting that meets your
needs, especially if there are young children or elderly people in the premises.
Refer to “Hotter Water Increases the Risk of Scald Injury” on page 4.
®
Heavy Duty Gas water heater. The
maximum thermostat
setting (82°C)
minimum recommended
stored water temperature
and minimum thermostat
setting
maximum recommended
supply temperature to
bathrooms, ensuites and
public areas
4
ABOUT YOUR WATER HEATER
WARNING
This water heater is not intended to be operated, adjusted or tampered with by
young children or infirm persons. Young children should be supervised to
ensure they do not interfere with the water heater.
The removal of the access cover(s) will expose 240 V wiring. They must only
be removed by an authorised or service person.
SAFETY
• Do not store flammable or
combustible materials near the
water heater. Flammable liquids
(such as petrol), newspapers and
similar articles must be kept well
away from the water heater and the
draught diverter or flue terminal.
• Gases from some aerosol sprays,
stain removers and household
chemicals become corrosive when
drawn into a flame. Do not use
aerosols and stain removers near
the water heater whilst it is working.
• Do not store swimming pool
chemicals, household cleaners,
etc., near the water heater.
• Do not place anything on top of the water heater or in contact with the
draught diverter or flue terminal. Ensure the flue terminal is not obstructed in
any way at any time.
• Do not use Propane / Butane gas mixtures in a Propane model. A Propane
model is designed to operate on Propane only. The use of
Propane / Butane mixture, such as automotive LPG fuel, in a Propane
model is unsafe and can cause damage to the water heater.
If the power supply cord or electrical conduit to the water heater is damaged, it
must be replaced by an authorised 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 your nearest Rheem Service Department or
Accredited Service Agent to arrange for an inspection.
5
ABOUT YOUR WATER HEATER
This water heater is supplied with a thermostat, an over-temperature cut-out,
and a combination temperature pressure relief valve. These devices must not
be tampered with or removed. The water heater must not be operated unless
each of these devices is fitted and is in working order.
The warranty can become void if relief valves or other safety devices are
tampered with or if the installation is not in accordance with these
instructions.
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater:
• Switch off the electrical supply at the isolating switch to the water heater(s).
• Close the gas isolation valve(s) at the inlet to the gas control(s).
• Close the cold water isolation valve on the cold water line to the water
heater(s) to shut down the entire system, or;
• Close the isolation valves on the cold and hot water branches to shut down
an individual water heater in a bank.
TO TURN ON THE WATER HEATER
• Open the isolation valves fully on the cold and hot water branches to the
water heater(s) installed in a bank.
• Open the cold water isolation valve on the cold water line to the water
heater(s). Air will be forced out of the taps.
• Open the gas isolation valve(s) fully at the inlets to the gas control(s).
• Switch on the electrical supply at the isolating switch to the water heater(s).
HOW DO I KNOW THE WATER HEATER IS INSTALLED CORRECTLY?
Installation requirements are shown on pages 22 to 23 and pages 32 to 36. The
water heater must be installed by an authorised person and the installation
must comply with National Standards AS/NZS 3500.4, AS/NZS 3000, AS 5601
and all local codes and regulatory authority requirements. In New Zealand the
installation must conform with NZS 5261 Code of Practice for Installation of
Gas Burning Appliances and the New Zealand Building Code.
6
ABOUT YOUR WATER HEATER
DOES THE WATER QUALITY AFFECT THE WATER HEATER?
The water heater is suitable for most public water supplies, however some
water qualities may have detrimental effects on the cylinder and fittings. If you
are in a known harsh water area you must read page 46. If you are not sure,
have your water quality checked against the conditions described on page 46.
HOW LONG WILL THE WATER HEATER LAST?
There are a number of factors that will affect the length of service the water
heater will provide. These include the water quality, the water pressure, the
water temperature (inlet and outlet) and the water usage pattern. However,
your Rheem water heater is supported by a comprehensive warranty (refer to
page 48).
ANODE PROTECTION
The anode(s) installed in your water heater will slowly dissipate whilst
protecting the cylinder. The life of the water heater cylinder may be extended
by arranging for an authorised person to inspect the anode(s) and replace if
required.
The suggested time after installation when the anode(s) should be inspected is:
Heavy Duty 7 years.
For softened water supplies or in areas of poor water quality, it is
recommended the anode(s) be inspected 3 years earlier than shown (refer to
“Water Supplies” on page 46).
7
HOW YOUR WATER HEATER WORKS
Water is stored in a vitreous enamel lined steel cylinder and heated by a gas
burner located under the cylinder. The heat produced by the burner is
transferred to the water through the base of the cylinder and through the wall of
a flue pipe which passes through the centre of the cylinder. A flue baffle in this
flue ensures the efficiency of the water heater is correct. The gas supply to the
burner is controlled by the thermostat so the water is heated to a constant
temperature. Automatic safety controls are fitted to the water heater to provide
safe and efficient operation.
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 18, a pressure limiting
valve must be fitted. The supply pressure should be
greater than 350 kPa for true mains pressure
operation to be achieved.
ELECTRONIC THERMOSTAT
The thermostat automatically operates the gas
control by switching its power on and off, so a
constant temperature is maintained. The thermostat
is mounted externally on the water heater and the
protective over temperature cut out is mounted inside
the lower front cover of the water heater.
There is no need to switch the water heater off when
it is not in use. The thermostat is fully automatic and
only allows the gas control to open when the burner
requires gas for heating. The thermostat may flash
“AH” (alarm high) and the current water temperature,
or “AL” (alarm low) and the current water
temperature. This is not a cause for concern unless
the temperature displayed is more than 10ºC above
the set temperature. Refer to “Diagnostic Features of
Electronic Thermostat” on page 12. To adjust the
thermostat settings refer to “Temperature Control” on
page 43.
HOT SURFACE IGNITION
The water heater incorporates an automatic burner ignition system. A hot
surface igniter (HSI) probe automatically heats up when the thermostat
registers heating of the water is required. When the HSI probe is fully
energised, the gas valve opens allowing gas to the burner which in turn is
ignited by the HSI probe.
8
REGULAR CARE
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 13).
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. It is very important
you raise and lower the lever gently.
DANGER: Failure to do this may result
in the water heater cylinder failing.
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 Department or their
Accredited Service Agent.
lift until water
flows from the
drain line –
lower gently
drain
line
The temperature pressure relief valve should be checked for performance or
replaced at intervals not exceeding 5 years, or more frequently in areas where
there is a high incidence of water deposits (refer to “Water Supplies” on
page 46).
EXPANSION CONTROL VALVE
In many areas, including South Australia, Western Australia and scaling water
areas, an expansion control valve is fitted to the cold water line to the water
heater. Water will flow from its drain line during the heating period.
Operate the easing lever on the expansion control valve once every six
months. It is very important you raise and lower the lever gently. The
expansion control valve should be checked for performance or replaced at
intervals not exceeding 5 years, or more frequently in areas where there is a
high incidence of water deposits.
water
heater
9
REGULAR CARE
SERVICING
For efficient operation the water heater should be serviced annually by your
nearest Rheem Service Department or their Accredited Service Agent. Only
genuine replacement parts should be used on this water heater.
Warning: Servicing of a gas water heater should only be carried out by
authorised personnel.
In commercial applications where large volumes of hot water are used,
sediment may build up on the bottom of the cylinder and reduce the heating
efficiency. In extreme cases, particularly in areas of high water sediment,
draining and flushing out may be necessary. Contact your plumber to drain and
flush the water heater.
10
SAVE A SERVICE CALL
Check the items below before making a service call. You will be charged for
attending to any condition or fault that is not related to manufacture or failure of
a part.
NOT ENOUGH HOT WATER (OR NO HOT WATER)
• Is the electricity switched on?
Inspect the isolating switch adjacent
to the water heater and ensure it is
turned on.
• Is there a time clock on the power
supply?
Check the settings on the time clock
and ensure they are suitable to enable
heating when it is required.
• Is the ignition system ‘locked out’?
Reset the water heater. Refer to
“Water Heater Not Operating” on
page 12.
• Is a code displayed on the electronic thermostat?
Check the LED display on the electronic thermostat. If a code is displayed,
refer to “Diagnostic Features of Electronic Thermostat” on page 12.
• 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 13).
• Thermostat setting
Ensure the thermostat setting is appropriate. You may choose to have your
electrician adjust the thermostats upwards to gain additional hot water
capacity.
Note: Hotter water increases the risk of scald injury.
• Water heater size
Do you have the correct size water heater for your requirements? The sizing
guide in the Rheem sales literature and on the Rheem website
(www.rheem.com.au) suggests average sizes that may be needed.
11
SAVE A SERVICE CALL
WATER HEATER NOT OPERATING
The ignition system may have ‘locked out’. To reset the water heater, switch
the electrical supply off at the isolating switch, wait ten seconds then switch on
again. If the water heater fails to light, phone your nearest Rheem Service
Department or Accredited Service Agent to arrange for an inspection.
DIAGNOSTIC FEATURES OF ELECTRONIC THERMOSTAT
This water heater incorporates an electronic thermostat. In the event of a fault
occurring a 2-digit code will be displayed on the thermostat LED to diagnose
the fault.
Code Fault
AL
AH
EE Memory error
E1 Temperature sensor failure
In the event of an “AL” fault, an attempt should be made to reset the electronic
control if the burner is not already alight (refer to “Water Heater Not Operating”
on page 12).
All other fault conditions should be attended to by your nearest Rheem Service
Department or Accredited Service Agent.
BURNER WILL NOT LIGHT
Temperature below the minimum set point (60ºC).
Refer to “Electronic Thermostat” on page 8.
Temperature above the maximum set point (82ºC).
Refer to “Electronic Thermostat” on page 8.
• Is the fan in the air duct (631 275 model only) operating continuously?
Ensure the front cover is securely in position. Switch off the electrical supply
at the isolating switch, wait 30 seconds and then switch the electrical supply
on again. Phone your nearest Rheem Service Department or Accredited
Service Agent to arrange for an inspection if the water heater burner fails to
light.
• Is there gas to the water heater?
Check the gas isolation valve on the gas supply line is open.
• Is there a normal gas supply to the rest of the premises?
Try lighting another gas appliance. If there is no gas call your gas provider.
• Is the ignition system ‘locked out’?
Try resetting the water heater. Refer to “Water Heater Not Operating” on
page 12.
12
SAVE A SERVICE CALL
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 9). This may
dislodge a small particle of foreign
matter and clear the fault. Release
the lever gently.
• Steady flows for long period
(often at night)
This may indicate the mains water
pressure sometimes rises above the
designed pressure of the water
heater. Ask your installing plumber
to fit a pressure limiting valve.
NEVER replace the relief valve with one of a higher pressure rating.
• Heavy flows of hot water until water heater is cold - then stops until
water reheats
The water heater must be switched off at the switchboard. Phone your
nearest Rheem Service Department or Accredited Service Agent to arrange
for an inspection.
EXPANSION CONTROL VALVE RUNNING
If an expansion control valve is fitted in the cold water line to the water heater
(refer to page 25) it may discharge a small quantity of water instead of the
temperature pressure relief valve on the water heater. The benefit is that
energy is conserved as the discharged water is cooler.
13
SAVE A SERVICE CALL
WATER HEATER APPEARS TO BE LEAKING
When the water heater is first lit or after a large usage of hot water,
condensation may form on the burner of the water heater. This is quite normal,
especially in winter months and will dry off as the water is heated.
HIGH GAS BILLS
Should you at any time feel your gas account is too high, we suggest you check
the following points:
• Is the relief valve running
excessively? (Refer to
“Temperature Pressure Relief Valve
Running” on page 13).
• Are outlets (especially the showers)
using more hot water than you
think? (Refer to “Not Enough Hot
Water” on page 11).
• Is there a leaking hot water pipe,
dripping hot water tap, etc? Even a
small leak will waste a surprising
quantity of hot water and gas.
Replace faulty tap washers, and
have your plumber rectify any
leaking pipe work.
• Consider recent changes to your hot water usage pattern and check if there
has been any increase in tariffs since your previous account.
IF YOU HAVE CHECKED ALL THE FOR EGOING AND ST ILL BEL IEVE YO U
NEED ASSISTANCE, PHONE YOUR NEAREST RHEEM SERVICE
DEPARTMENT OR ACCREDITED SERVICE AGENT
14
INSTALLATION
THIS WATER HEATER IS NOT SUITABLE FOR POOL HEATING
Check the water heater is suitable for the gas type available
(refer to the rating label on the water heater)
Note: In Australia, natural gas models can be connected to SNG, however the
hourly gas consumption may be reduced (typically by 10%).
WATER HEATER LOCATION
An indoor model must be installed indoors and an outdoor model must be
installed outdoors, except where a 631 275 model water heater is installed
indoors with a Rheem room sealed installation kit. The water heater should be
installed either close to the most frequently used outlets or with a circulated
flow and return system and its position chosen with safety and service in mind.
Make sure people (particularly children) will not touch the flue outlet. The flue
terminal must be clear of obstructions and shrubbery.
Clearance must be allowed for servicing of the water heater. The water heater
must be accessible without the use of a ladder or scaffold. Make sure the
temperature pressure relief valve lever is accessible and the front covers or
panels, thermostats and burner can be removed for service.
You must be able to read the information on the rating plate. If possible leave
headroom of one water heater length so the anode can be inspected or
replaced. Remember you may have to take the entire water heater out later for
servicing.
The installation must comply with the requirements of AS/NZS 3500.4,
AS/NZS 3000, AS 5601 and all local codes and regulatory authority
requirements. In New Zealand, the installation must conform with NZS 5261
Code of Practice for Installation of Gas Burning Appliances and the New
Zealand Building Code.
The water heater must not be installed in an area with a corrosive atmosphere
where chemicals are stored or where aerosol propellants are released.
Remember the air may be safe to breathe, but when it goes through a flame,
chemical changes take place which may attack the water heater.
For a single water heater installation, follow the diagrams on pages 22 and 23.
For multiple water heater installations, follow the instructions on pages 32
to 36.
15
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