Owner’s Guide and Installation Instructions Gas Heavy Duty Water Heater 265 litre and 275 litre models This water heater must be installed and serviced by a qualified person. Please leave this guide with the householder.
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. PATENTS This water heater 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.
CONTENTS RESPONSIBLE OFFICER – We recommend you read pages 4 to 16. The other pages are intended for the installer but may be of interest. About Your Water Heater ............................................................................................................ 4 Regular Care ................................................................................................................................ 8 Water Supplies............................................................................
ABOUT YOUR WATER HEATER WATER HEATER APPLICATION This water heater is designed for the purpose of heating potable water. Its use in an application other than this may shorten its life. MODEL TYPE ® The Rheem Heavy Duty Gas water heater model you have chosen is either a 265 litre or 275 litre indoor or outdoor quick recovery water heater. Water is stored in a vitreous enamel lined steel cylinder and heated by a gas burner located under the cylinder.
ABOUT YOUR WATER HEATER 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.
ABOUT YOUR WATER HEATER 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.
ABOUT YOUR WATER HEATER HOW DO I KNOW THE WATER HEATER IS INSTALLED CORRECTLY? Installation requirements are shown on pages 17 to 24. The water heater must be installed: by a qualified person, and in accordance the installation instructions, and in compliance with Standards AS/NZS 3500.4, AS 5601 or AS/NZS 5601.1, as applicable under local regulations, and all local codes and regulatory authority requirements. In New Zealand the installation must also conform with the New Zealand Building Code.
REGULAR CARE MINOR SIX MONTH MAINTENANCE It is recommended minor maintenance be performed every six months 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 10. Warning: Exercise care to avoid any splashing of water, as water discharged from the drain line will be hot.
REGULAR CARE MAJOR FIVE YEAR SERVICE It is recommended a major five year service be conducted on the water heater. 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 five year 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.
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 15).
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.
WATER SUPPLIES ANODE INSPECTION AND REPLACEMENT The anodes installed in your water heater will slowly dissipate whilst protecting the cylinder. The life of the cylinder may be extended by replacing the anodes. If the anodes are not replaced during a five year service (refer to “Major Five Year Service” on page 9) then the maximum time after installation when the anodes should be replaced for this water heater is 8 years.
WATER SUPPLIES no warranty applies to a: temperature pressure relief valve or a water heater cylinder unless an expansion control valve is fitted. SATURATION INDEX (SI) GAS STORAGE WATER HEATERS WITHIN WARRANTY SPECIFICATION -1.0 very corrosive 0 +0.4 SATURATION INDEX (calculated @ 80°C water temperature) scaling corrosive +0.8 very scaling SUMMARY OF WATER CHEMISTRY ADVICE AFFECTING WARRANTY The water heater and its components are not suitable for certain water chemistries.
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.
SAVE A SERVICE CALL DIAGNOSTIC FEATURES OF ELECTRONIC THERMOSTAT This water heater incorporates an electronic thermostat. In the event of a fault occurring with the thermostat, a 2-digit code will be displayed. Code E1 Fault Temperature sensor failure If the fault code is displayed, phone Rheem Service or their nearest Accredited Service Agent to arrange for an inspection.
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.
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%). INSTALLATION STANDARDS The water heater must be installed: by a qualified person, and in accordance the installation instructions, and in compliance with Standards AS/NZS 3500.
INSTALLATION 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 23 and 24. For multiple water heater installations, follow the instructions on pages 33 to 36.
INSTALLATION OUTDOOR INSTALLATION The water heater is to be installed at ground or floor level on a stable fireproof base as acceptable to local authorities. The water heater must also stand vertically upright with the back of the water heater against or within 25 mm of an external wall or alternatively against a fireproof screen extending at least 500 mm above, below and either side the flue terminal. Failure to observe this precaution can cause problems in high wind areas.
INSTALLATION HOT WATER DELIVERY This water heater can deliver water at temperatures which can cause scalding. It is necessary and we recommend that a temperature limiting device be fitted between the water heater and the hot water outlets in any ablution and public areas such as bathrooms, ensuites or public amenities, to reduce the risk of scalding.
INSTALLATION CIRCULATED HOT WATER FLOW AND RETURN SYSTEM If a Rheem water heater is to be installed as part of a circulated hot water flow and return system, a storage water heater able to provide a hot water outlet temperature of at least 60°C must be used. Note: The thermostat must always be set to at least 60°C. Refer to the diagram on page 21. Refer also to “Recirculation System” on page 41.
INSTALLATION REDUCING HEAT LOSSES The cold water line to and the hot water line from the water heater 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 electronic thermostat above 70°C unless it is necessary.
INSTALLATION TYPICAL INSTALLATION – OUTDOOR LOCATION 631 275 model shown 23
INSTALLATION TYPICAL INSTALLATION – INDOOR LOCATION 621 275 model shown 24
INSTALLATION DIMENSIONS AND TECHNICAL DATA Model No. Storage capacity (litres) Nominal Dimensions (mm) A B C D E F G H K L M P Weight empty (kg) Gas Details 621265 (Indoor) 265 1795 610 750 750 700 380 1655 36° 660 302 125 137 Hourly Gas Consumption (MJ) 631265 (Outdoor) 265 1835 610 710 750 700 380 1655 36° 660 302 420 146 621275 (Indoor) 275 1895 640 780 760 700 340 1695 36° 722 320 200 172 Min.
CONNECTIONS – PLUMBING All plumbing work must be carried out by a qualified person and in compliance with the Standard AS/NZS 3500.4 and all local codes and regulatory authority requirements. All gas work must be carried out by a qualified person and in compliance with the Standard AS 5601 or AS/NZS 5601.1, as applicable under local regulations, and all local codes and regulatory authority requirements. CONNECTION SIZES Hot water connection: Rp 1¼. Cold water connection: Rp 1¼.
CONNECTIONS – PLUMBING TEMPERATURE PRESSURE RELIEF VALVE The temperature pressure relief valve is shipped in the plastic bag attached to the side of the water heater. The temperature pressure relief valve must be fitted before the water heater is operated. Before fitting the relief valve, make sure the probe has not been bent. Seal the thread with Teflon tape - never hemp. Make sure the tape does not hang over the end of the thread.
CONNECTIONS – PLUMBING GAS INLET The gas connection is made to the left hand side of the gas control. The pipe work must be cleared of foreign matter before connection and purged before attempting to light the water heater. An isolation valve and disconnection union must be used to allow servicing and removal of the water heater. Note: Refer to the Gas Installations Standard AS 5601 or AS/NZS 5601.1 for the correct method of sizing the gas supply pipe to the water heater.
CONNECTIONS – ELECTRICAL The power supply to the water heater must not be switched on until the water heater is filled with water and a satisfactory megger reading is obtained. Note: AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in potable water.
CONNECTIONS – ELECTRICAL THERMOSTAT SETTING The thermostat is adjustable from 60°C to 82°C. For reasons of safety and economy, we advise the thermostat is set at the lowest temperature that will provide sufficient hot water. Discuss the thermostat setting requirements with a responsible officer. Refer to “Temperature Control” on page 41.
CONNECTIONS – ELECTRICAL POWER FLUE EXTERNAL CONTROLS – INTERMITTENT OPERATION Notes 1. Power source for the water heater, fan and control circuit must be from the same circuit. 2. R1 monitors return signal. 3. R2 monitors alarm signal. 4. T1 to be set for 20-30 seconds. 5. Meets requirements of Clause H2.2.6 of AS5601 or Clause H2.2.5 of AS/NZS 5601.1, as applicable under local regulations, providing lockout in the event of flue product flow failure. 6.
CONNECTIONS – ELECTRICAL POWER FLUE EXTERNAL CONTROLS – 24 HOUR OPERATION Notes: WIRING DIAGRAM - 24 HR FAN OPERATION POWER FLUE CONNECTION 1. Power source forand the SINGLE water heater, fan and control circuit be fromTYPE the same circuit. (197- 427) MULTIPLE RHEEM 621 SERIES &must RAYPAK A SERIES WATER HEATERS 2. R1 monitors return signal. 3. R2 monitors alarm signal. 4. T1 to be set for 20-30 seconds. 5. Use SPO with round earth terminal. Water heater supply cord must be changed to suit. 6.
MULTIPLE INSTALLATIONS A multiple installation of Rheem water heaters on a single manifold or multiple manifolds is possible, using ® the Rheem Equa-Flow manifold system, where large volumes of hot water are required. The Equa-Flow principle will function with water heaters in line, around a corner or in rows back to back (refer to the diagrams on page 34). The cold water and hot water manifolds must be designed to balance the flow from each water heater.
MULTIPLE INSTALLATIONS In Line Manifold Single Bank of Water Heaters Multiple Banks of Water Heaters Angle Manifold Back to Back Manifold TPR Valve Drain Line Common Discharge Point 34
MULTIPLE INSTALLATIONS TYPICAL INSTALLATION – RHEEM HEAVY DUTY GAS WATER HEATERS LEGEND RHEEM COMMERCIAL WATER HEATERS TYPICAL INSTALLATION INSTALLATION DIMENSIONS – RHEEM HEAVY DUTY GAS WATER HEATERS In Line Manifold Angle Manifold Back to Back Manifold Installation Layout Minimum Dimensions INSTALLATION LAYOUT MINIMUM DIMENSIONS MODEL Notes A B C D E* F* Model A B C D E* F* 621 265 860 610 300 100 1750 900 621 275 890 640 300 100 1780 900 2.
MULTIPLE INSTALLATIONS MANIFOLD ARRANGEMENT Hot Manifold Assembly Cold Manifold Assembly 36
COMMISSIONING TO FILL AND TURN ON THE WATER HEATER The power supply to the water heater must not be switched on until the water heater is filled with water and a satisfactory megger reading is obtained. Open all of the hot water tap(s) in the building (don‟t forget the showers) and supply cock(s) and valve(s) in the system. Open the isolation valves fully on the cold and hot water branches to the water heater(s) installed in a bank.
LIGHTING THE WATER HEATER FOR YOUR SAFETY READ BEFORE LIGHTING Warning: This gas water heater is designed to operate reliably and safely as long as the lighting procedure is followed exactly. Make sure the water heater is filled with water and the water supply is on, otherwise serious damage to the vitreous enamel cylinder lining and plastic components may occur.
LIGHTING THE WATER HEATER DIAGNOSTIC FEATURES OF HOT SURFACE IGNITION CONTROL Warning: The removal of the access covers will expose 240 V wiring. They must only be removed by a qualified person only. The water heater incorporates an electronic control module. This is located inside the access cover of an indoor model and to the right of the access cover inside the air duct on an outdoor model (refer to installation diagrams on pages 23 and 24).
LIGHTING THE WATER HEATER BURNER PRESSURE ADJUSTMENT Switch off the electrical supply at the isolating switch. Attach a manometer to the test spigot at side of gas control. Switch on the electrical supply at the isolating switch. Check the gas pressure (refer to data plate). If necessary adjust the regulator under the cap on top of the gas control. AIR ADJUSTMENT The normal setting is to have the interrupter screw clear of the burner throat for Natural and LP gases.
TEMPERATURE CONTROL HOTTER WATER INCREASES THE RISK OF SCALD INJURY. This water heater can deliver water at temperatures which can cause scalding. It is necessary and we recommend that a temperature limiting device be fitted between the water heater and the hot water outlets in any ablution and public areas such as bathrooms, ensuites or public amenities, to reduce the risk of scalding.
TEMPERATURE CONTROL THERMOSTAT ADJUSTMENT The water heater is supplied with the thermostat preset at 70°C. It will be necessary to adjust the thermostat temperature setting if another temperature is required. When adjusting the thermostat temperature it is necessary to alter the thermostat offset. The table outlines the thermostat temperature and the corresponding offset. Failure to adjust the offset will result in incorrect water temperature.
RHEEM HEAVY DUTY GAS MAINS PRESSURE WATER HEATER WARRANTY - AUSTRALIA ONLY GAS WATER HEATER 621, 631 SERIES 265, 275 MODELS 1. THE RHEEM WARRANTY – GENERAL 1.1 This warranty is given by Rheem Australia Pty Limited ABN 21 098 823 511 of 1 Alan Street, Rydalmere New South Wales. 1.2 Rheem offer a trained and qualified national service network who will repair or replace components at the address of the water heater subject to the terms of the Rheem warranty.
RHEEM HEAVY DUTY GAS MAINS PRESSURE WATER HEATER WARRANTY - AUSTRALIA ONLY GAS WATER HEATER 621, 631 SERIES 265, 275 MODELS 3. WHAT IS COVERED BY THE RHEEM WARRANTY FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT 3.
