Owner’s Guide and Installation Instructions Rheem 27 Water Star Continuous Flow Gas Water Heater 874 series - W27 model 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 a 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 or Paloma Co., Ltd.
CONTENTS HOUSEHOLDER - 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 .............................................................................................................................. 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 ® The Rheem 27 Water Star continuous flow gas water heater model you have chosen is for outdoor installation only. This model has an extended manufacturer‟s warranty (refer to the Rheem warranty on page 35).
ABOUT YOUR WATER HEATER HOW HOT SHOULD THE WATER BE? The water heater heats the water to the preset outlet temperature setting.
ABOUT YOUR WATER HEATER SAFETY ® This water heater is supplied with temperature sensors, a FlameSafe protection system and a pressure relief valve. The Water Star water saving component within the water heater is supplied with a temperature limiting valve, a thermostat, an over-temperature cut-out and a combination temperature pressure relief valve. The operation of the over-temperature cut-out on the thermostat indicates a potentially dangerous situation.
ABOUT YOUR WATER HEATER TO TURN OFF THE WATER HEATER If it is necessary to turn off the water heater: Switch off the electrical supply at the power outlet to the water heater if there is no risk of freezing conditions occurring (refer to note below). Close the gas isolation valve at the inlet to the water heater. Close the cold water isolation valve at the inlet to the water heater.
ABOUT YOUR WATER HEATER DRAINING THE WATER HEATER Switch off the electrical supply at the power outlet to the water heater. Close the gas isolation valve at the inlet to the water heater. Leave the cold water isolation valve open at the inlet to the water heater. Open a hot tap (preferably the shower outlet) for 20 seconds, to purge any hot water left in the water heater. Close the cold water isolation valve, and leave the hot tap remain open.
ABOUT YOUR WATER HEATER 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, its components and fittings. Refer to “Water Supplies” on page 12. 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 page 12.
REGULAR CARE GENERAL MAINTENANCE The jacket of the water heater can be cleaned with a soft cloth and warm mild soapy water. Under no circumstances should abrasive materials or powders be used. The area around the water heater can be sprayed with insecticide to rid the area of insects. Insects encroaching into or nesting in the water heater can interfere with the operation of the water heater and also damage components.
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 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 heat exchanger, a copper cylinder, a temperature pressure relief valve and a heating unit. Where there is a changeover from one water supply to another, e.g.
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 35). COLD WATER FROM THE HOT TAP Close the hot tap, wait 10 seconds and open the hot tap again. Is the hot tap open enough? The burners will not light if the flow rate is less than 2.0 L / min.
SAVE A SERVICE CALL CLOUDS OF WHITE ‘VAPOUR’ FROM THE FLUE TERMINAL During the heating cycle, it is not unusual to see water vapour clouds steaming from the flue terminal, particularly on cold days. This is normal operation of the water heater. PRESSURE RELIEF VALVE DISCHARGING A pressure relief valve is incorporated into the continuous flow side of the water heater controls. This valve protects the water heater, by allowing water to escape, in the event of excessive pressure build up in the waterways.
SAVE A SERVICE CALL EXPANSION CONTROL VALVE RUNNING If an expansion control valve is fitted in the cold water line to the continuous flow water heater (refer to page 24). 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.
INSTALLATION – WATER HEATER THIS WATER HEATER IS FOR OUTDOOR INSTALLATION ONLY. 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 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. A secondary flue is not required. The water heater must not be installed indoors or in a confined space.
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 between an 874 series water heater and the hot water outlets in any ablution and public areas such as a bathroom, ensuite or public amenities, to reduce the risk of scalding.
INSTALLATION – WATER HEATER DIMENSIONS AND TECHNICAL DATA Model 874W27 Rated delivery (@ 40°C rise) Recovery (@ 25°C rise) Mass litres / min 16.5 litres / min 27 kg 29 Empty Hourly Gas Consumption (MJ) Min Gas Pressure (kPa) minimum maximum Max Gas Pressure (kPa) Model W27 W27 W27 W27 W27 Natural Propane 205 205 1.13 2.75 0.193 0.277 0.905 1.430 3.50 3.50 Gas Details Test Point Gas Pressure (kPa) Model numbers: N = Natural, P = Propane.
INSTALLATION – WATER HEATER TYPICAL INSTALLATION – OUTDOOR LOCATION 22
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.
CONNECTIONS – PLUMBING PIPE SIZES The pipe sizing for hot water supply systems should be carried out by persons competent to do so, choosing the most suitable pipe size to ensure adequate flow for each individual application. Reference to the technical specifications of the water heater and local regulatory authority requirements must be made. To achieve true mains pressure operation, the cold water line to the water heater should be the same size or bigger than the hot water line from the water heater.
CONNECTIONS – PLUMBING RELIEF VALVE DRAIN DN15 copper drain lines must be fitted to the temperature pressure relief valve and expansion control valve (if one is installed) to carry the discharge clear of the water heater. Connect the drain lines to the valves using disconnection unions.
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. 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 is supplied with a 1.
WIRING DIAGRAM 27
COMMISSIONING All water heaters are tested and adjusted before dispatch from the factory, however further adjustments may become necessary because of local conditions. TO TURN ON THE WATER HEATER Open all of the hot taps in the house (don‟t forget the shower). Open the cold water isolation valve fully at the inlet 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 for leaks. Open the gas isolation valve fully.
COMMISSIONING Gas Inlet Test Point Pressure To check the gas inlet pressure: 1. Close any hot taps and ensure the burners are not operating. 2. Close the gas isolation valve at the gas inlet to the water heater. 3. Locate the gas inlet test point on the gas connection to the water heater. 4. 5. Remove the test point screw and washer from the test point orifice. Connect the manometer. Open the gas isolation valve fully at the gas inlet to the water heater.
COMMISSIONING BURNER GAS PRESSURE It is necessary to check the burner gas pressure at both the minimum and maximum operational settings. To check and if necessary adjust the operational gas pressures, the electrical supply to the water heater must be switched on, the burners ignited and hot water must be flowing from a hot tap. Warning: The removal of the front panel will expose 240 volt wiring. Take care not to touch wiring terminals.
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 hot tap recommence the procedure from Step 8. If the adjuster button is released before Step 13, clear any error code (if displayed) and recommence the procedure from Step 8. Maximum test point gas pressure Refer to the rating label on the water heater for the maximum test point gas pressure.
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: 874 series 38°C, 40°C, 42°C, 43°C, 45°C, 50°C, 55°C, 60°C, 70°C, 75°C Notes: Setting the preset outlet temperature to less than 50°C IS NOT RECOMMENDED. If the temperature is adjusted to less than 50°C the water saving function of the water heater will not operate resulting in nil water saving.
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 are vacant, then: Switch off the electrical supply at the power outlet to the water heater (refer to note below). Close the gas isolation valve at the inlet to the water heater. Close the cold water isolation valve at the inlet to the water heater.
DRAINING THE WATER HEATER To drain the water heater: Switch off the electrical supply at the power outlet to the water heater. Close the gas isolation valve at the inlet to the water heater. Leave the cold water isolation valve open at the inlet to the water heater. Open hot tap (preferably the shower outlet) for 20 seconds, to purge any hot water left in the water heater. Close the cold water isolation valve, and leave the hot tap remain opened.
RHEEM WATER STAR CONTINUOUS FLOW GAS WATER HEATER WARRANTY – AUSTRALIA ONLY CONTINUOUS FLOW GAS WATER HEATERS 874 SERIES, W27 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, the supplier of Rheem continuous flow gas water heaters, manufactured by Paloma Co., Ltd., a world leader in water heater technology and manufacture. 1.
RHEEM WATER STAR CONTINUOUS FLOW GAS WATER HEATER WARRANTY – AUSTRALIA ONLY CONTINUOUS FLOW GAS WATER HEATERS 874 SERIES, W27 MODELS 3. WHAT IS COVERED BY THE RHEEM WARRANTY FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT 3.
