AquaMAX CG20 Series Owner's Manual And Installation Instructions
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AquaMAX CG20 Series Owner's Manual And Installation Instructions

Cg20 series continuous flow gas water heater
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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.

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Summary of Contents for AquaMAX CG20 Series

  • Page 1 Owner’s Guide 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.
  • Page 2 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. Aquamax Australia Pty Limited is the supplier of the Aquamax range of continuous flow gas water heaters, manufactured by Paloma Co., Ltd., a world leader in water heater technology and manufacture.

  • Page 3: Table Of Contents

    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 ........................... 22 Save A Service Call ........................23 Installation –...

  • Page 4: About Your Water Heater

    The in-series gas booster is for heating water at times of low solar energy gain, such as during cloudy or rainy weather, or during colder months. Solar heated water can reach temperatures up to 70°C to 80°C for an Aquamax pumped direct solar system. The in-series gas booster operates automatically. When the solar heated water temperature is 58°C or higher, the flow passes through the in-series gas booster without boosting.
  • Page 5 If this water heater is installed as part of a solar water heater system, the system can deliver water at temperatures from 58°C up to 80°C with an Aquamax pumped direct solar water heater. HOTTER WATER INCREASES THE RISK OF SCALD INJURY This water heater can deliver water at temperatures which can cause scalding.
  • Page 6 Warning: For continued safety of this water heater it must be installed, operated and maintained in accordance with the Owner‟s Guide and Installation Instructions. The Aquamax warranty may not cover faults if relief valves or other safety devices are tampered with or if the installation is not in accordance with these instructions.
  • Page 7 Service. Note: The five year service and routine replacement of any components, if required, are not included in the Aquamax warranty. A charge will be made for this work. Only genuine replacement parts should be used on this water heater.
  • Page 8 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).
  • Page 9 Damage caused by freezing due to the unavailability of power at the water heater is not covered “Terms of the Aquamax Warranty” by the Aquamax warranty (refer to on page 59). If it is necessary to switch the power off to the water heater and there is a risk of freezing, then it is “Draining the Water Heater”...
  • Page 10 ABOUT YOUR WATER HEATER HOW DO I KNOW IF THE WATER HEATER IS INSTALLED CORRECTLY? Installation requirements are shown on pages 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.

  • Page 11: Temperature Control

    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).
  • Page 12 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.
  • Page 13 TEMPERATURE CONTROL CONTROLLER priority light in use light  up display panel button water volume symbol  down button water volume operating light on / off operating light water volume button on / off controller type button K = Kitchen B1 = Bathroom1 B2 = Bathroom2 Note: water volume button, water volume operating light and water volume symbol are on the Kitchen...
  • Page 14 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 warm average hot shower...
  • Page 15 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...
  • Page 16 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...
  • Page 17 TEMPERATURE CONTROL To operate the Kitchen controller: 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.
  • Page 18 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...
  • Page 19 TEMPERATURE CONTROL To operate a Bathroom controller: 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.
  • Page 20 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.
  • Page 21 TEMPERATURE CONTROL Turn off the alarm i n us e pri ori ty  Press the water volume button to turn off the alarm. 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.

  • Page 22: Water Supplies

    In a corrosive water supply, the water can attack copper parts and cause them to fail. Where the saturation index is less than –1.0, the water is very corrosive and the Aquamax warranty does not apply to a copper heat exchanger in a continuous flow water heater.

  • Page 23: Save A Service Call

    SAVE A SERVICE CALL Check the items below before making a service call. You will be charged for attending to any condition or “Terms of the Aquamax Warranty” fault, which is not related to manufacture or failure of a part (refer to page 59).
  • Page 24 Collector area is too small For most installations, the number of solar collectors recommended in the Aquamax literature has been proven to provide the required solar energy to meet the average family needs. However, in some circumstances, it may be necessary to install an additional solar collector.
  • Page 25 OK MONITOR, turn off the hot tap and turn off the controller(s). Phone Aquamax Service to arrange for an inspection. HIGHER THAN EXPECTED GAS BILLS Should you at any time, feel your gas account is higher than expected,...

  • Page 26: Installation - Water Heater

    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...
  • Page 27 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...
  • Page 28 Damage to the water heater caused by freezing of the pipe work to or from the water heater is not covered under the Aquamax warranty. Refer to AS/NZS 3500.4 for precautions to be taken for installations in frost prone areas. The water heater is not suitable for installation in areas where the ambient temperature falls below -20°C (including wind chill factor).
  • Page 29 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.
  • Page 30 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.
  • Page 31 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.
  • Page 32 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.
  • Page 33 INSTALLATION – WATER HEATER WATER TEMPERATURE DIAGRAMS CG20-NG-60 CG20-NG-50 CG20-LP-60 CG20-LP-50 CG20-60 series Kitchen and Bathroom Controllers CG20-50 series CG20-NG-50 CG20-NG-60 CG20-LP-50 CG20-LP-60 CG20-60 series Kitchen Controller Only CG20-50 series CG20-NG-60 CG20-NG-50 CG20-LP-60 CG20-LP-50 CG20-60 series Bathroom Controllers Only CG20-50 series CG20-NG-50 CG20-NG-60 CG20-LP-60...
  • Page 34 Hourly Gas Min. Gas Max. Gas Gas Details Test Point Gas Pressure (kPa) Consumption Pressure Pressure minimum maximum (MJ) (kPa) (kPa) CG20 series CG20 series CG20 series CG20 series CG20 series Natural 1.13 0.170 0.870 3.50 Propane 2.75 0.190 1.185 3.50...
  • Page 35 INSTALLATION – WATER HEATER DIMENSIONS – CONTROLLERS Kitchen Controller Bathroom Controller...
  • Page 36 TYPICAL INSTALLATION ELECTRONIC INSTANTANEOUS GAS WATER HEATER INSTALLATION – WATER HEATER TYPICAL INSTALLATION – OUTDOOR LOCATION...

  • Page 37: Connections - Plumbing

    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 Model CG20 series Hot water connection R¾/20 Cold water connection R¾/20 Gas inlet R¾/20...
  • Page 38 Warning: Always isolate the water heater before pressure testing the gas supply system. Disconnect the water heater after the isolation valve to prevent the risk of serious damage to the gas control. The Aquamax warranty does not cover damage of any nature resulting from failure to observe this precaution. Refer to...

  • Page 39: Connections - Electrical

    The power consumption of the water heater is: Power Comments Component consumption CG20 series – Burner on, anti frost device inactive Gas water heater 61 Watts CG20 series – Burner on, anti frost device active 151 Watts The water heater will only operate on a sine wave at 50 Hz. Devices generating a square wave cannot be...

  • Page 40: Installation - Controllers

    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).
  • Page 41 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.
  • Page 42 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.
  • Page 43 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).
  • Page 44 INSTALLATION – CONTROLLERS Wiring installation: Penetrate the wall with a 30-35 mm hole at the controller location. Install the supplied cable between the location of the controller and the water heater. Remove the base plate from the controller. Peel off one side of the adhesive paper from the foam packing and adhere to the back face of the base plate.
  • Page 45 INSTALLATION – CONTROLLERS CONNECTING THE CONTROLLER(S) TO THE WATER HEATER To connect the controller(s) to the water heater: Ensure the electrical supply to the water heater is switched off. Unscrew and gently remove the front panel from the water heater. Draw the cable(s) through the cable grommet on the underside of the water heater.

  • Page 46: Commissioning

    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.
  • Page 47 COMMISSIONING Gas Inlet Test Point Pressure To check the gas inlet pressure: Close any hot taps and ensure the burners are not operating. Close the gas isolation valve at the gas inlet to the water heater. Locate the gas inlet test point on the gas connection to the water heater.
  • Page 48 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.
  • Page 49 COMMISSIONING 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. 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.
  • Page 50 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. After setting the minimum and maximum test point gas pressures: Close the hot tap.
  • Page 51 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 CG20-50 Maximum Outlet Temperature...
  • Page 52 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. The preset outlet temperature settings and series of flashes are: CG20-60 series 55°C (1 flash), 60°C (2 flashes), 70°C (3 flashes) CG20-50 series...
  • Page 53 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. Warnings After adjustment, the water temperature from the first tap in the hot water pipe work after the water heater used for personal hygiene purposes, such as in a bathroom or ensuite, MUST NOT exceed: ...
  • Page 54 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 “To Check or Adjust the Preset Outlet Temperature Setting” at 43°C or 45°C.
  • Page 55 The frost protection system will be rendered inoperable if electrical power is not available at the water heater. Damage caused by freezing due to the unavailability of power at the water heater is not covered by the “Terms of the Aquamax Warranty” Aquamax warranty (refer to on page 59).

  • Page 56: Draining The Water Heater

    DRAINING THE WATER HEATER To drain the water heater: Turn off the water heater “Turn Off The Water Heater” Refer to 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.
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  • Page 59: Warranty

    2.1 The decision of whether to repair or replace a faulty component is at Aquamax’s sole discretion. 2.2 If you require a call out and we find that the fault is not covered by the Aquamax warranty, you are responsible for our standard call out charge.
  • Page 60 3. WHAT IS COVERED BY THE AQUAMAX WARRANTY FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT 3.1 Aquamax will repair or replace a faulty component of your water heater if it fails to operate in accordance with its specifications as follows:...

This manual is also suitable for:

Cg20-50 seriesCg20-60 series

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