Owner’s Guide and Installation Instructions Air Sourced Heat Pump Water Heater MPi 551 Series This water heater must be installed and serviced by a qualified person. Please leave this guide with the householder.
PATENTS This water heater may be protected by one or more patents or registered designs in the name of Rheem Australia Pty Ltd. ® TRADE MARKS 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.
CONTENTS HOUSEHOLDER – We recommend you read pages 4 to 18. The other pages are intended for the installer but may be of interest. About Your Water Heater ............................................................................................................ 4 Regular Care .............................................................................................................................. 10 Water Supplies.......................................................................................
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 air sourced heat pump water heater is designed for outdoor installation only. The model you have chosen is a 551 series model. The 551 325 model water heater is recommended for connection to a minimum 16 hour per day power supply.
ABOUT YOUR 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 20, 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 heat pump circulator and heat pump system to operate effectively.
ABOUT YOUR WATER HEATER SAFETY This water heater is supplied with a thermostat, two over-temperature energy cut-outs and a combination temperature pressure relief valve. These devices must not be tampered with or removed. The water heater must not be operated unless each of these devices is fitted and is in working order. The operation of the over-temperature cut-out on the thermostat indicates a possibly dangerous situation.
ABOUT YOUR WATER HEATER Notes: Power must be available at the water heater and to the heat pump for the LEDs to glow or flash. When power is turned on or reconnected to the water heater, the red LED will emit a solid glow for three (3) seconds and then extinguish. This is normal operation and does not indicate a fault. The LED display will then return to the current operational status.
ABOUT YOUR WATER HEATER TIMER CONTROL A timer can be installed in the electrical circuit to the water heater. The timer must be weatherproof if it is installed outdoors. It may be desirable for the water heater not to operate between certain hours, such as during the peak period when connected to a Time of Use electricity supply due to a more expensive tariff rate applying. A timer will affect the operating times of both the heat pump circuit and the booster heating unit.
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 “Regular Care” on page 10 and to “Anode Inspection and Replacement” on page 12.
REGULAR CARE MINOR SIX MONTH MAINTENANCE It is recommended minor maintenance be performed every six months 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 11. Warning: Exercise care to avoid any splashing of water, as water discharged from the drain line will be hot.
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 17).
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 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. In areas where this is likely to occur, the installer should instruct the householder on how to dissipate the gas safely.
SAVE A SERVICE CALL Check the items below before making a service call. You will be charged for attending to any condition or fault that is not related to manufacture or failure of a part. NOT ENOUGH HOT WATER (OR NO HOT WATER) Is the electricity switched on? Inspect the isolating switch marked “HOT WATER” or “WATER HEATER” at the switchboard and the isolating switch (if one is installed) at the water heater and ensure they are turned on.
SAVE A SERVICE CALL HEAT PUMP IS NOT OPERATING There must be power available at the water heater and to the heat pump for the heat pump to operate and for the LEDs to glow or flash. Time controlled power supply (no power at the water heater) If the water heater is connected to a time controlled power supply, then during periods of no power supply at the water heater the LEDs will be off. This is not a fault condition, but a result of no power being available to energise the LEDs.
SAVE A SERVICE CALL Backup heating mode and series of red flashes During the backup heating mode by the booster heating unit, caused by either the thermal cut out activating or a heat pump fault condition, the red LED will emit a series of flashes. At the completion of a heating cycle by the booster heating unit in the backup heating mode and the water temperature reaches 70°C, the thermostat controlling the booster heating unit opens circuit cutting power to the heat pump causing the red LED to go out.
SAVE A SERVICE CALL TEMPERATURE PRESSURE RELIEF VALVE RUNNING Normal Operation It is normal and desirable this valve allows a small quantity of water to escape during the heating cycle. However, if it discharges more than a bucket full of water in 24 hours, 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 11).
SAVE A SERVICE CALL HIGHER THAN EXPECTED ELECTRICITY BILLS With the installation of your new air sourced heat pump water heater, maximum electrical energy savings can be achieved.
INSTALLATION THIS WATER HEATER IS FOR OUTDOOR INSTALLATION ONLY. THIS WATER HEATER IS NOT SUITABLE FOR POOL HEATING. INSTALLATION STANDARDS The water heater must be installed: by a qualified person, and in accordance with the installation instructions, and in compliance with Standards AS/NZS 3500.4, AS/NZS 3000 and all local codes and regulatory authority requirements. In New Zealand, the installation must also conform with Clause G12 of the New Zealand Building Code.
INSTALLATION WATER HEATER LOCATION The water heater is suitable for outdoor installation only. The water heater should be installed close to the most frequently used outlet and its position chosen with noise, safety and service in mind. Make sure people (particularly children) will not accidentally touch the air inlet louvres and outlet grille and that they are clear of obstructions and shrubbery.
INSTALLATION TANK WATER SUPPLY If the water heater is supplied with water from a tank supply and a minimum water supply pressure of 200 kPa at the water heater cannot be achieved, then a pressure pump system must be installed to allow the heat pump circulator to operate and avoid air locks in the circuit. Care must be taken to avoid air locks. The cold water line from the supply tank should be adequately sized and fitted with a full flow gate valve or ball valve.
INSTALLATION CIRCULATED HOT WATER FLOW AND RETURN SYSTEM An MPi 551 series heat pump water heater should not be installed as part of a circulated hot water flow and return system in a building. If a circulated flow and return system is required, it is necessary to bypass the heat pump water heater and install a secondary water heater connected to the hot water flow and return line and supplied from the heat pump water heater.
INSTALLATION ANODE TYPES 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 storage tank.
INSTALLATION DIMENSIONS AND TECHNICAL DATA WALL 100 AIR INLET AIR OUTLET 574 C 30 H 0M IN IN 0M TPR VALVE 30 AIR INLET VENTILATION CLEARANCE 245 K CONDENSATE DRAIN B HOT OUTLET AIR INLET 30 0 M IN VENTILATION CLEARANCE A D AIR OUTLET 871 1018 ELECTRICAL 546 CONNECTION COLD INLET F E System number Tank model number Storage capacity Boost capacity 1.8 kW 2.4 kW*, 3.
HEAT PUMP AND TANK ASSEMBLY STORAGE TANK AND HEAT PUMP MODULE The heat pump water heater is made of two main components, the storage tank and the heat pump module. For transport and handling (weight) purposes both items are shipped separately and designed to be assembled at the installation site. The water heater must not be operated until both components are assembled. The heat pump storage tank and module must be installed on a level slab or solid base of a minimum 900 mm wide x 650 mm deep.
HEAT PUMP AND TANK ASSEMBLY KIT There is a kit supplied with the heat pump module (PN 080199) and a kit supplied with the 410 model heat pump storage tank (PN 290122). The components supplied in the kit and required for the installation are: Part No Kit Components and Description 080199 Kit Installation Heat Pump Module Integrated Quantity 126558 Installation instructions heat pump module integrated 1 052158 Saddle clamp 20 mm Clipsal 261/20 1 080021 Screw phillips pan head No.
HEAT PUMP AND TANK ASSEMBLY ASSEMBLY PROCEDURE Warning: The heat pump must be assembled, plumbed and filled with water prior to power being connected and switched on. The following procedure should be followed to properly place the heat pump module in position and connect to the storage tank: 1. Heat Pump Storage Tank: Remove all packaging including the carton base from the heat pump storage tank and position in its intended location, supported by a level slab or solid base.
HEAT PUMP AND TANK ASSEMBLY 4. Mains Power Connection: Connect the mains power supply wiring to the terminal block and earth connection inside of the lower front cover. Secure the conduit to the side of the storage tank with a saddle clamp. The saddle clamp must be positioned over the pilot holes provided, otherwise the conduit will interfere with the heat pump module installation. Refer to “Connections – Electrical” on page 38.
HEAT PUMP AND TANK ASSEMBLY 7. Foam Tape: (410 litre storage tank only) – Retrieve the length of foam tape from the kit supplied with the 410 storage tank. The foam tape is to be applied to the bottom at the front of the 410 litre storage tank. The ends of the foam tape are to line up with the two vertical slots in the jacket. The mid point of the tape (lengthways) is to line up over the join between the jacket of the storage tank and the jacket bottom.
HEAT PUMP AND TANK ASSEMBLY 9. Cover Strip: (410 litre storage tank only) – Retrieve the length of rubber cover strip from the kit supplied with the 410 storage tank. Line up one end of the cover strip with one end of the heat pump housing black top, fitting the strip over the lip of the housing, ensuring the jacket is hard up against the lip of the heat pump housing. The cover strip will hold the jacket in position. Apply the cover strip along the full length of the lip of the heat pump housing.
HEAT PUMP AND TANK ASSEMBLY 13. Flexible Braided Hoses: Retrieve the loose ends of the two flexible braided hoses from within the heat pump module, and withdraw through the rear of the heat pump module. 14. Cold Hose Connection: Attach the flexible braided hose, marked with a blue collar, from the bottom of the heat exchanger to the fitting in the bottom connection on the storage tank and marked “INLET” in blue. Tighten the swivel nut on the hose using a 24 mm spanner. Tape or sealant is not required.
HEAT PUMP AND TANK ASSEMBLY 17. Cable Tab: Remove the tab on the side of the electrical entry to the heat pump module to accommodate the electrical conduit. Pliers or tin snips may be required to remove the tab. Step 17 remove the tab on the side of the electrical entry to the heat pump module 18. Studs: Retrieve the three (3) studs from the kit and screw into the three (3) threaded inserts on the side of the tank closest to the wall.
HEAT PUMP AND TANK ASSEMBLY 19. Position Heat Pump Module: Position the heat pump module against the tank. Engage the tab at the bottom of the heat pump module, on the wall side of the module, into the slot in the tank. Align the holes in the side of the heat pump module over the three studs. 20. Flange Nuts: Screw the three flange nuts onto the studs to connect the wall side of the heat pump module to the storage tank. Steps 19 and 20 align heat pump module over studs and screw on flange nuts 21.
HEAT PUMP AND TANK ASSEMBLY 23. Tank Sensor Cable Connection: Insert the tank sensor cable plug to the connector on the underside of the control box. The plug is polarised and can only be inserted one way. Ensure the plug fully engages the locking feature on the connector. 24. Power Cable Connection: Insert the four pin power cable plug to the connector on the underside of the control box. The plug is polarised and can only be inserted one way.
HEAT PUMP AND TANK ASSEMBLY 26. Water Connections: Connect the cold water supply and the hot water pipe work to the water heater. Connect the temperature pressure relief valve and its drain line. Refer to “Connections – Plumbing” on page 36. 27. Water Supply: Turn on the cold water supply and fill the water heater.
CONNECTIONS – PLUMBING All plumbing work must be carried out by a qualified person and in accordance with the requirements of the Standard AS/NZS 3500.4, and all local codes and regulatory authority requirements. In New Zealand, the installation must conform with Clause G12 of the New Zealand Building Code. CONNECTION SIZES Hot water connection: RP¾/20. Cold water connection: RP¾/20. Relief valve connection: RP½/15.
CONNECTIONS – PLUMBING EXPANSION CONTROL VALVE Local regulations may make it mandatory to install an expansion control valve (ECV) in the cold water line to the water heater. In other areas, an ECV is required if the saturation index is greater than +0.4 (refer to “Water Supplies” on page 12). The expansion control valve must always be installed after the non return valve and be the last valve installed prior to the water heater (refer to diagram on page 36).
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. MEGGER READING When a megger test is conducted on this water heater, then the following should be noted. Warning: This water heater contains electronic equipment and 500 V insulation tests must only be conducted between active and earth and between neutral and earth. An active to neutral test WILL damage the electronics.
CONNECTIONS – ELECTRICAL WIRING DIAGRAM THERMOSTAT BLUE LIGHT RED BROWN BLACK BLUE LIGHT RED C COMPRESSOR CAPACITOR RED CONTROL BOARD BLUE R S BLACK COMP-N COMP-A GREEN/YELLOW FAN COMPRESSOR PLUG BLACK RED BROWN BLUE BLUE BLACK GREEN/YELLOW GREEN/YELLOW NC NO EARTH FAN CAPACITOR FAN PLUG CABLING INSIDE TANK JACKET NEUTRAL GREEN/YELLOW HEATER ELEMENT COM T2 - Compressor Thermistor RED T1 - Evaporator Thermistor T0 - Tank Thermistor Remote LED Display BLUE PUMP FAN-A FA
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 taps in the house (don‟t forget the shower). Open the cold water isolation valve fully to the water heater. Air will be forced out of the taps. Close each tap as water flows freely from it. Check the pipe work and the connection points for the flexible braided hoses for leaks.
COMMISSIONING DIAGNOSTIC FEATURES OF THE HEAT PUMP CONTROLLER An operating mode monitor is located on the front of the heat pump module and houses a green and a red LED. The green LED, marked “NORMAL”, indicates the current operating mode of the heat pump water heater and the red LED, marked “ATTENTION”, indicates a fault mode. The green LED will emit either a constant glow or a series of flashes, with a 2 second interval between each series. A series of long green flashes may also be emitted.
COMMISSIONING Possible fault condition There may be a fault condition with the water heater if either: there is power available at the water heater and the green LED is off, and the water heater has not operated outside of the heat pump‟s operating range – refer to “Heat pump operating range” on page 15. Before phoning to arrange a service inspection due to the green LED being off, refer to “Heat Pump Is Not Operating” on page 15 in the “Save A Service Call” section of this Owner‟s Guide.
RHEEM HEAT PUMP WATER HEATER WARRANTY - AUSTRALIA ONLY HEAT PUMP WATER HEATER MODELS 551325, 551410 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 HEAT PUMP WATER HEATER WARRANTY - AUSTRALIA ONLY HEAT PUMP WATER HEATER MODELS 551325, 551410 3. WHAT IS COVERED BY THE RHEEM WARRANTY FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT 3.
