Owner’s Guide and Installation Instructions Continuous Flow Gas Water Heater CG20 series 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 25. The other pages are intended for the installer but may be of interest. About Your Water Heater ............................................................................................................ 4 Temperature Control ................................................................................................................. 11 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 Aquamax 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 Aquamax warranty on page 59).
ABOUT YOUR WATER HEATER MAINS PRESSURE The water heater is designed for direct connection to the mains water supply. If the mains supply pressure in your area exceeds that shown on page 28, a pressure limiting valve must be fitted. The supply pressure should be greater than 140 kPa for the rated flow and performance to be achieved.
ABOUT YOUR WATER HEATER CIRCULATED HOT WATER FLOW AND RETURN SYSTEM A CG20-60 model continuous flow water heater can be installed as part of a circulated hot water flow and return system in a building. Notes: the preset outlet temperature setting of the water heater must be set to at least 60°C. Water should not be circulated from a water heater with a temperature setting of less than 60°C.
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 TO TURN OFF THE WATER HEATER If it is necessary to turn off the water heater: Turn off the controllers(s) (if fitted) by pressing the on / off button. The light in the on / off button will go out and the priority light, if it is on, will go out. 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.
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.
ABOUT YOUR WATER HEATER HOW DO I KNOW IF THE WATER HEATER IS INSTALLED CORRECTLY? Installation requirements are shown on pages 26 to 36. 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 5601.1, as applicable under local regulations, and all local codes and regulatory authority requirements.
TEMPERATURE CONTROL CONTROLLERS The Aquamax CG20 series of continuous flow water heaters can be installed with Aquamax controllers to enable the user to control the temperature of the delivered water from the outlet of the water heater. There are three types of controller. They are the Kitchen controller (PN AQ3264101, including cable), Bathroom1 controller (PN AQ3264102, including cable) and the Bathroom2 controller (PN AQ3264103, including cable).
TEMPERATURE CONTROL CONTROLLER FUNCTIONS If one or more controllers are installed, at least one must be on for the water heater to operate. If all controllers are off, the water heater will only deliver cold water. on / off button – This button must be pressed once to turn on the controller. A controller cannot be turned on if water is flowing from a hot tap. To turn off a controller, press the on / off button once. The light will go out. A controller can be turned off whilst water is flowing.
TEMPERATURE CONTROL CONTROLLER priority light in use light up button display panel water volume symbol down button water volume operating light on / off operating light water volume button on / off button controller type K = Kitchen B1 = Bathroom1 B2 = Bathroom2 Note: water volume button, water volume operating light and water volume symbol are on the Kitchen controller only. SILENCING A CONTROLLER The controller emits a sound whenever a button is pressed.
TEMPERATURE CONTROL TEMPERATURE SETTINGS The temperature settings of each type of controller are: Bathroom1 & 2 37°C to 46°C (in 1°C increments), 48°C*, 50°C Kitchen 37°C to 46°C (in 1°C increments), 48°C*, 50°C, 55°C, 60°C * limited to 48°C on a CG20-50 model. Temperature settings 37 38 warm 39 40 41 42 43 44 average hot shower 45 46 48 hot 50 55 60 very hot The installation of a Bathroom controller(s) only (i.e.
TEMPERATURE CONTROL TEMPERATURE ADJUSTMENT A controller must be on and have priority to be able to adjust the temperature setting. The temperature adjustment is made by pressing the up () button or down () button. The maximum temperature setting for the controllers are: Kitchen Bathroom CG20-60 series 60°C 50°C CG20-50 series 48°C 48°C Each press of the up () button will increase the temperature setting by one increment.
TEMPERATURE CONTROL KITCHEN CONTROLLER The Kitchen controller allows the user to select the temperature setting for the hot water to be used in the kitchen and laundry. It has a minimum temperature setting of 37°C and a maximum temperature setting of: CG20-60 series 60°C CG20-50 series 48°C The Kitchen controller does not have priority if a Bathroom controller is on. Notes on the Kitchen controller: The controller cannot be turned on whilst a hot tap is open.
TEMPERATURE CONTROL To operate the Kitchen controller: 1. 2. Turn off the Bathroom controller(s) If a temperature setting is displayed and the priority light is not glowing, it is necessary to turn off the Bathroom controller(s) to gain priority. Refer to the notes on the Kitchen controller on page 16. Turn on the Kitchen controller Press the on / off button. 50 The on / off operating light and the priority light will both glow.
TEMPERATURE CONTROL BATHROOM CONTROLLERS The Bathroom controller(s) allows the user to select the temperature setting for the hot water to be used in the bathroom. They have a minimum temperature setting of 37°C and a maximum temperature setting of: CG20-60 series 50°C CG20-50 series 48°C The Bathroom controllers operate in tandem. Whenever an operation is selected on one Bathroom controller, it is also set on the other Bathroom controller.
TEMPERATURE CONTROL To operate a Bathroom controller: 1. Turn off the Kitchen controller If a temperature setting is displayed and the priority light is not glowing, it is advised to turn off the Kitchen controller. Refer to the notes on the Bathroom controllers on page 18. 2. pri ori ty i n us e Turn on the Bathroom controller 40 Press the on / off button. C The on / off operating light and the priority light will both glow.
TEMPERATURE CONTROL WATER VOLUME FUNCTION The water volume function is designed to warn, by a beeping sound, that a certain volume of water has been delivered from the water heater. It does not stop either the flow of or the heating of water. This function is particularly useful if a bath is being filled, or measuring the water consumed by the use of a shower. The water volume function can only be set by the Kitchen controller. Refer to the notes on the water volume function on page 21.
TEMPERATURE CONTROL 5. Turn off the alarm pri ori ty i n us e Press the water volume button to turn off the alarm. 42 The water volume operating light goes out and 0 x10l is displayed momentarily on the controller. The temperature setting of the controller with priority is then displayed. 6. C x10l check hot water temperature before use water vol ume on off Close the hot tap If it is a Bathroom controller which is in use and has priority, then it is advised to leave the controller on.
WATER SUPPLIES This water heater must be installed in accordance with this advice to be covered by the Aquamax 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 Aquamax Warranty” on page 59). NO DISPLAY ON THE CONTROLLER Is the controller turned on? Press the on / off button (refer to “Temperature Control” on pages 11 to 21).
SAVE A SERVICE CALL GAS BOOSTER OPERATING TOO FREQUENTLY If the water heater is installed as an in-series gas booster to a solar water heater, you may find that the water heater operates more frequently than expected. This will occur when the solar heated water temperature is lower than 58°C, which may be experienced during periods of low solar energy gain or if there has been heavy hot water usage.
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 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.
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 This water heater must be installed vertically upright with the water, gas and power connections on the underside, pointing toward the ground. The back of the water heater can be either against a wall or supported by a frame. Note: The water heater must be well secured to the wall or frame using two fasteners each at the top and bottom of the unit (refer to page 34 for mounting hole positions and weight of the water heater).
INSTALLATION – WATER HEATER RECESS INSTALLATION The water heater can be installed recessed into a wall. A recess box (PN AQ0350101) is available for such an installation. Refer to the installation instructions which accompany the recess box kit for information on its installation. An additional rating label is supplied attached to the inside of the front cover of the water heater. This is for a service person to access the water heater details when required.
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 a CG20-60 model 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 Gas Booster for a Solar Water Heater The temperature limiting device used with a CG20-60 model in-series gas booster as part of a solar water heater installation must have the additional capability of receiving a hot water supply temperature of up to 99°C if the solar water heater does not have an over temperature protection system to limit the water to no greater than 90°C.
INSTALLATION – WATER HEATER CIRCULATED HOT WATER FLOW AND RETURN SYSTEM A CG20-60 model water heater can be installed as part of a circulated hot water flow and return system in a building. Notes: the preset outlet temperature setting of the water heater must be set to at least 60°C. Water should not be circulated from a water heater with a temperature setting of less than 60°C.
INSTALLATION – WATER HEATER LEGEND Circulated Hot Water Flow and Return Continuous Flow Gas Water Heater LEGEND from solar storage tank Circulated Hot Water Flow and Return In-series Gas Booster as part of a Solar Water Heater Installation LEGEND REDUCING HEAT LOSSES The hot water line from the water heater and the pipe work between the solar storage tank, if one is installed, and the in-series gas booster must be insulated in accordance with the requirements of AS/NZS 3500.4.
INSTALLATION – WATER HEATER WATER TEMPERATURE DIAGRAMS CG20-NG-60 CG20-LP-60 CG20-NG-50 CG20-LP-50 CG20-60 series Kitchen and Bathroom Controllers CG20-50 series CG20-NG-50 CG20-LP-50 CG20-NG-60 CG20-LP-60 CG20-60 series Kitchen Controller Only CG20-NG-60 CG20-LP-60 CG20-50 series CG20-NG-50 CG20-LP-50 CG20-60 series Bathroom Controllers Only CG20-50 series CG20-NG-50 CG20-LP-50 CG20-NG-60 CG20-LP-60 CG20-60 series No Controllers CG20-50 series Notes: Temperature Limiting Devices – ref
INSTALLATION – WATER HEATER DIMENSIONS AND TECHNICAL DATA Model Gas Type Maximum Preset Outlet Temperature Setting CG20-NG-50 natural 48°C Rated delivery (@ 40°C rise) litres / min 12.5 CG20-NG-60 natural 70°C Recovery (@ 25°C rise) litres / min 20 CG20-LP-50 propane 48°C Mass kg 16 CG20-LP-60 propane 70°C Gas Details Natural Propane Empty (unpackaged) Hourly Gas Consumption (MJ) Min. Gas Pressure (kPa) minimum maximum Max.
INSTALLATION – WATER HEATER DIMENSIONS – CONTROLLERS Kitchen Controller Bathroom Controller 35
TYPICAL INSTALLATION INSTALLATION – WATER HEATER ELECTRONIC INSTANTANEOUS GAS WATER HEATER TYPICAL INSTALLATION – OUTDOOR LOCATION 36
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 – 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. Warning: Temperature controllers must not be fitted to this water heater (CG20-60 model) if it is installed as an in-series gas booster with a solar water heater because water at a temperature much higher than the controller setting can be delivered.
INSTALLATION – CONTROLLERS CONTROLLERS The Aquamax CG20 series of continuous flow water heaters can be installed with Aquamax controllers to enable the user to control the temperature of the delivered water from the outlet of the water heater. There are three types of controller. They are the Kitchen controller (PN AQ3264101, including cable), Bathroom1 controller (PN AQ3264102, including cable) and the Bathroom2 controller (PN AQ3264103, including cable).
INSTALLATION – CONTROLLERS KITCHEN CONTROLLER The Kitchen controller (PN AQ3264104) is to be installed in the kitchen or laundry only. It has a minimum temperature setting of 37°C and a maximum temperature setting of: CG20-60 series 60°C CG20-50 series 48°C Choose a suitable location for the Kitchen controller, away from water, heat and sunlight. Kitchen controller base plate screw x 2 controller screw Kitchen Controller Components Wiring installation: 1.
INSTALLATION – CONTROLLERS controller suitable wall anchors wall penetration cable projections terminal screws screws base plate controller screw Kitchen Controller Installation Concealed Cable If it is necessary to have an exposed wiring installation, follow this procedure omitting Steps 1 and 4, and make an opening in the thin section in the underside of the controller to accommodate the cable (as shown in the diagram), prior to Step 6.
INSTALLATION – CONTROLLERS BATHROOM1 AND BATHROOM2 CONTROLLERS If only one Bathroom controller is to be installed, the Bathroom1 Controller (PN AQ3264105) must be used. If two Bathroom controllers are to be installed, one must be a Bathroom1 controller and the other must be a Bathroom2 controller (PN AQ3264106).
INSTALLATION – CONTROLLERS Wiring installation: 1. Penetrate the wall with a 30-35 mm hole at the controller location. 2. Install the supplied cable between the location of the controller and the water heater. 3. Remove the base plate from the controller. 4. Peel off one side of the adhesive paper from the foam packing and adhere to the back face of the base plate. This is the side without the projections. 5. Peel off the remaining adhesive paper from the foam packing. 6.
INSTALLATION – CONTROLLERS CONNECTING THE CONTROLLER(S) TO THE WATER HEATER To connect the controller(s) to the water heater: 1. Ensure the electrical supply to the water heater is switched off. 2. Unscrew and gently remove the front panel from the water heater. 3. Draw the cable(s) through the cable grommet on the underside of the water heater. 4. Connect a cable lug from each cable to each of the remote controller terminals. Each cable has two cable lugs.
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. WASHER 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 11. Press and hold down the MIN button (“1L” is shown on the controller display), and observe the reading on the manometer. The red LED will glow and remain solid. 12. Release the MIN button. The red LED goes out. If the manometer reading observed in step 11 agrees with the rating label, no further adjustment is required. 13. To adjust, press and hold down the adjuster button (“LH” is shown on the controller display). The red LED will glow and remain solid.
COMMISSIONING Maximum test point gas pressure Refer to the rating label on the water heater for the maximum test point gas pressure. Follow Steps 10 to 16 of the “Minimum test point gas pressure” procedure on page 48, but open the hot tap fully and use the MAX button instead of the MIN button. It may be necessary to open two or three hot taps fully, depending upon the model of water heater and the incoming cold water temperature. Note: In Step 11, “3H” (CG20 series) will be shown on the controller display.
COMMISSIONING PRESET OUTLET TEMPERATURE SETTING The factory preset outlet temperature setting of the water heater is: CG20-60 series 60°C CG20-50 series 48°C If a temperature controller is connected to the water heater, this will override the preset outlet temperature setting and the maximum temperature setting will be: CG20-60 series CG20-50 series Kitchen controller connected 60°C 48°C Bathroom controller only connected 50°C 48°C Maximum Outlet Temperature It is usually not necessary to adj
COMMISSIONING TO CHECK OR ADJUST THE PRESET OUTLET TEMPERATURE SETTING The temperature setting will be displayed by a series of flashes from the red LED, with a three (3) second pause between each series of flashes.
COMMISSIONING OUTLET TEMPERATURE COMPENSATION ADJUSTMENT – CG20-50 SERIES The maximum outlet temperature of a CG20-50 series water heater may be adjusted to compensate for temperature losses in the pipe work between the water heater outlet and sanitary fixtures.
COMMISSIONING Note: The preset outlet temperature setting of this water heater must be set at 48°C prior to the commencement of this procedure. This procedure cannot be performed if the preset outlet temperature is set at 43°C or 45°C. Refer to “To Check or Adjust the Preset Outlet Temperature Setting” on page 52. Outlet Temperature Adjustment To adjust the outlet temperature: Switch on the electrical supply at the power outlet to the water heater. 2.
COMMISSIONING 13. Repeat steps 2 to 5. if the water temperature is still below: 48°C (if a temperature controller is to be connected), or 50°C (if no temperature controller is to be connected) and requires to be increased, repeat steps 10 to 12, followed by steps 2 to 5 until an acceptable water temperature not exceeding 48°C or 50°C respectively is measured at the same hot tap.
DRAINING THE WATER HEATER To drain the water heater: Turn off the water heater Refer to “Turn Off The Water Heater” on page 55. Open a hot tap (preferably the shower outlet). Unscrew the two drain plugs, one each at the cold water inlet and hot water outlet, on the underside of the water heater. Water will drain from the water heater. When water stops flowing from the water heater, close the hot tap.
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AQUAMAX CONTINUOUS FLOW GAS WATER HEATER WARRANTY – AUSTRALIA ONLY CONTINUOUS FLOW GAS WATER HEATER CG20 SERIES 1. THE AQUAMAX WARRANTY – GENERAL 1.1 This warranty is given by Aquamax Australia Pty Limited ABN 37 138 189 689 of 463-467 Warrigal Road Moorabbin Victoria, the supplier of Aquamax continuous flow gas water heaters, manufactured by Paloma Co., Ltd., a world leader in water heater technology and manufacture. 1.
AQUAMAX CONTINUOUS FLOW GAS WATER HEATER WARRANTY – AUSTRALIA ONLY CONTINUOUS FLOW GAS WATER HEATER CG20 SERIES 3. WHAT IS COVERED BY THE AQUAMAX WARRANTY FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT 3.
