Owner’s Guide and Installation Instructions Rheem Multipak® Commercial Hot Water Systems This water heater must be installed and serviced by a qualified person. Please leave this guide with a responsible officer.
Please read this manual prior to installing this product, it contains all the necessary technical and installation information that will be required by the contactor to correctly install & commission this system. This product must be installed & commissioned in accordance with the Rheem installation instructions, AS/NZS 5601, AS/NZS 3500.4, the relevant electrical & local authorities‟ requirements. Operational design of this Hot Water System is protected by Australian Patent No: 2007201101.
CONTENTS RESPONSIBLE OFFICER - We recommend you read pages 4 to 12. The other pages are intended for the installer but may be of interest. CONTENTS ................................................................................................................................... 3 About your water heater ............................................................................................................. 4 Water Supplies...............................................................................
ABOUT YOUR WATER HEATER The Rheem Multipak is a bank of two, three, four, five or six continuous flow water heaters factory manifolded in parallel. All components are factory assembled on a lightweight frame suitable for either wall or optional floor mounting. This water heater is designed for the purpose of heating potable water. Its use in an application other than this may shorten its life.
ABOUT YOUR WATER HEATER MULTIPAK – MODELS AVAILABLE & TECHNICAL SPECIFICATIONS Multipak Model Wall Mount Floor Mount Secondary Circulation Pump Water Supply Pressure kPa Max Min kPa Gas Supply Pressure Range Natural kPa Propane kPa Electrical supply Amps (240V/1Ph/50Hz) MPE02 & MPI02 MPE03 & MPI03 MPE04 & MPI04 MPE05 & MPI05 MPE06 & MPI06 standard optional optional standard optional optional standard optional optional standard optional optional standard optional optional 800 140 1.13 – 3.5 2.
ABOUT YOUR WATER HEATER HOTTER WATER INCREASES THE RISK OF SCALD INJURY This water heater can deliver water at temperatures which can cause scalding. We recommend and it may be required by regulations that an approved temperature limiting device be fitted into the hot water piping to ablution, bathing and public areas when an Commpak water heater is installed. This will keep the water temperature below the maximum permitted by AS/NZS 3500.4 to these areas.
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 over 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.
ABOUT YOUR WATER HEATER ANNUAL SERVICE For safe and efficient operation, it is recommended an annual service be conducted on the water heater. Only genuine replacement parts should be used on this 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. The annual service includes the following actions: Check and if necessary adjust the gas pressure. Check the operation of and clean the burner.
ABOUT YOUR WATER HEATER FROST PROTECTION The water heater has a frost protection system. The frost protection system will protect the water heater from damage, by preventing ice forming in the waterways of the water heater, in the event of freezing conditions occurring. Notes: The frost protection system will be rendered inoperable if electrical power is not available at the water heater.
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.
SAVE A SERVICE CALL Check the items below before making a service call. You will be charged for attending to any condition or fault, which is not related to manufacture or failure of a part (refer to “Terms of the Rheem Warranty” on page 36). COLD WATER FROM THE HOT TAP Is the water heater plugged in and the power outlet switched on? Is power available in the premises? Try using another electrical appliance.
SAVE A SERVICE CALL ERROR CODE The water heater provides a diagnostic error code in the event of an interruption to its operation. The error code is displayed on the controller(s) (if installed) and on the OK MONITOR on the front of the water heater as a numerical value. If an error code appears: Close the hot tap, switch off the electrical supply to the water heater. Check the gas isolation valve at the gas inlet to the water heater is fully open.
MULTIPAK – TECHNICAL SPECIFICATIONS RHEEM WATER HEATERS & STAGING VALVES Two (2) to Six (6) Off „Rheem Continuous Flow Water Heaters‟(CFWH) Mounted and plumbed in parallel. 2nd to 6th water heaters are fitted with staging valve/s. PLUMBING DETAILS Complete cold water and hot water piping, valves and fittings to AS3500.4. Complete gas piping, valves and fittings to AS5601. Optional circulating pump complete with valves and fittings to AS3500.
MULTIPAK – TECHNICAL SPECIFICATIONS CIRCULATION PUMP OPTION Optional Circulating Pump Package comprising of: A 25mm in-line circulating pump in cast bronze designed for secondary hot water circulation. 240V/1Ph/50Hz; IP44 canned motor with three speed setting option. Pump is provided with unions, in-line strainer, isolation ball valves, check valve and integrated into the system with required plumbing fittings. TECHNICAL NOTES: 1.
INSTALLATION – WATER HEATER THIS WATER HEATER IS FOR OUTDOOR OR INDOOR INSTALLATION, MODEL DEPENDANT. 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) 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 5601 or AS/NZS 5601.
INSTALLATION - WATER HEATER OUTDOOR INSTALLATION If outdoors a secondary flue is not required. The water heater must not be installed indoors or in a confined space. The water heater must be located to ensure that the location of the flue terminal complies with the requirements of AS/NZS 5601 or AS/NZS 5601.1, as applicable under local regulations. As a guide the following requirements are extracted from the AS/NZS 5601. The distances are measured along the wall behind the water heater.
INSTALLATION – WATER HEATER FROST PROTECTION The water heater has a frost protection system. The frost protection system will protect the water heater from damage, by preventing ice forming in the waterways of the water heater, in the event of freezing conditions occurring. The frost protection system will be rendered inoperable if electrical power is not available at the water heater.
INSTALLATION - WATER HEATER 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 into the hot water piping to any ablution and public areas such as a bathroom, ensuite or public amenities when a Commpak water heater is installed to reduce the risk of scalding.
CONNECTIONS – PLUMBING SITE LOCATION External Systems - Recommended 800mm access clearance from Horizontal Flue Outlets Internal Systems - Recommended 600mm access clearance. Refer: Australian Standard Gas Installations AS/NZS5601 – 2004 Fig 5.3 for further requirements Secure to to the floor or wall as appropriate. Consult with site structural engineer for any specific securing requirements.
CONNECTIONS - ELECTRICAL All electrical work and permanent wiring must be carried out by a qualified person and in accordance with the Wiring Rules AS/NZS 3000 and all local codes and regulatory authority requirements. The water heater will only operate on a sine wave at 50 Hz. Devices generating a square wave cannot be used to supply power to the water heater. Power supply: Electrician to fit 240V/1Ph/50Hz general purpose outlet power supply to each CFWH and optional pump.
MULTIPAK INTERNAL (MPI02-MPI06) – GENERAL ARRANGEMENT 21
MULTIPAK EXTERNAL (MPE02-MPE06) – GENERAL ARRANGEMENT 22
COMMISSIONING INITIAL CHECKS 1. Check that the power supply to the system is switched OFF. 2. Check that an adequate water supply is available to the hot water system. Water supply pressure shall not exceed 800kPa. 3. OPEN cold water inlet valve, hot water outlet valve, (and hot water return valve with pump option only) Check all individual water heater isolation valves are OPEN; 4. Check that the system is fully charged, all the air is bled from the system and no leaks are evident. 5.
COMMISSIONING GAS INLET TEST POINT PRESSURE To check the gas inlet pressure, select the CFWH at the furthest point in the manifold as the test unit: 1. Ensure the burners are not operating, by turning off the power to the Commpak. 2. Close the gas isolation valve at the gas inlet to the CFWH. 3. Locate the gas inlet test point on the gas connection to the CFWH. Remove the test point screw and washer from the test point orifice. WASHER Connect the manometer. 4. 5.
COMMISSIONING Warning: The removal of the front panel will expose 240 volt wiring. Take care not to touch wiring terminals. Note: If the Commpak is using 872027 or 862027 model CFWH and is installed as an in-series gas booster for a solar water heater, then the temperature of the water entering Commpak must be at least 2°C below the water heater preset outlet temperature setting. Otherwise the gas burners will not ignite and the test point gas pressures cannot be measured. 1.
COMMISSIONING Notes: If the burners extinguish and error code 11 or 12 starts to flash on the LED display: release the MIN and adjuster buttons close the CFWH isolation valve clear the error code (refer to “Clearing Error Code” on page 26) recommence the procedure from Step 7 If the adjuster button is released before Step 12, clear any error code (if displayed) and recommence the procedure from Step 7.
COMMISSIONING PRESET OUTLET TEMPERATURE SETTING The factory preset outlet temperature setting of the water heater is: 60°C as part of a Multipak system 50°C as part of a Mulitpak /50 system It is usually not necessary to check or adjust the factory preset outlet temperature setting of the water heater, unless the customer or application has a particular requirement for this to be done.
COMMISSIONING TO CHECK OR ADJUST THE PRESET OUTLET TEMPERATURE SETTING The temperature settings will be displayed on the LED display. The preset outlet temperature settings are: 872/862 series 38°C, 40°C, 42°C, 43°C, 45°C, 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, 82°C It is necessary to have the electrical supply to the water heater switched on during stages of checking or adjusting the preset outlet temperature setting procedure. Warning: The removal of the front panel will expose 240 volt wiring.
COMMISSIONING TO TURN OFF THE WATER HEATER If it is necessary to turn off the water heater on completion of the installation, such as on a building site or where the premises is vacant, then: Switch off the electrical supply at the isolating switch to the Commpak (refer to note below). Close the gas isolation valve at the inlet to the Commpak. Close the cold water, hot water flow and building return isolation valves at the inlet to the Commpak.
COMMISSIONING START UP CHECKS Before turning 240VAC power on to the Hot Water System ensure the following checks are undertaken. OPTIONAL CIRCULATION PUMP WARNING Note: Dry running of the pump will result in permanent damage and is not covered under warranty 1. Bleed the pump by unscrewing the Stainless Steel plug at end of motor casing. Check that the pump shaft is free to turn, if not, free the shaft with a flat bladed screwdriver. Screw the Stainless Steel plug back in.
COMMISSIONING MULTIPAK – COMMISSIONING SHEET Customer : Project and Address: Package Details: Installation Overall Installation? Ventilation Requirements? Co-axial Flueing OK Comments Compliance to AS5601 is mandatory Compliance to AS5601 is mandatory Refer: Owner's Guide and Installation Instructions Model 027 Continuous Flow Gas Outdoor Water Heater 872 Series Electronic Continuous Flow Gas Indoor Water Heater 862 Series Fuel: Natural Gas / LPG Gas Pressure During full Load Operation? Natural Gas: 1.
COMMISSIONING MULTIPAK – FAULT FINDING PROCEDURE Fault No Hot Water Possible Causes Description & Recommended Corrective Action Gas Failure Check gas supply and reinstate Power Failure Check and reinstate Power Supplies to all the power outlets. Water Supply Failure Check adequate cold water supply is available to all CFWH & no valves are shut. Check for minimum 140KPa water supply pressure available.
COMMISSIONING MULTIPAK – OPTIONAL CIRCULATING PUMP SUCTION STRAINER CLEANING 1. Turn Off the power supply to the circulating pump. Isolate the pump upstream valve. 2. Remove the pump upstream strainer assembly. Clean and refit. 3. Re-instate the pump upstream valves to open position. 4. Follow the secondary pump commissioning start-up instructions 7, 8 and 9 as stated before. 5. Re-instate the pump power supply.
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RHEEM CONTINUOUS FLOW GAS WATER HEATER WARRANTY – AUSTRALIA ONLY CONTINUOUS FLOW GAS WATER HEATER MULTIPAK MODELS MP02-MP06 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, the supplier of Rheem continuous flow gas water heaters, manufactured by Paloma Co., Ltd., a world leader in water heater technology and manufacture. 1.
CONTINUOUS FLOW GAS WATER HEATER MULTIPAK MODELS MP02-MP06 3. WHAT IS COVERED BY THE RHEEM WARRANTY FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT 3.
