Rheem 864 Series Owner's Manual And Installation Instructions
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Rheem 864 Series Owner's Manual And Installation Instructions

Rheem 864 Series Owner's Manual And Installation Instructions

Continuous flow gas indoor water heater
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Installation Instructions
The ONLY suitable flue parts are certified Rheem coaxial flue components
•
Unless a certified Rheem coaxial flue system, venting to the outside through a certified Rheem
terminal, is installed in accordance with the Installation Instructions.
•
If a loud continued vibration occurs during operation
This water heater must be installed and serviced by a qualified person.
Owner's Guide
and
Continuous Flow
Gas Indoor Water Heater
864, 866 series B28 models
INSTALLER:
carrying the following label:
DO NOT use any other type of flue parts.
Carefully follow the Installation Instructions.
OPERATOR:
DO NOT OPERATE THIS WATER HEATER:
Please leave this guide with the householder.

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Summary of Contents for Rheem 864 Series

  • Page 1 OPERATOR: DO NOT OPERATE THIS WATER HEATER: • Unless a certified Rheem coaxial flue system, venting to the outside through a certified Rheem terminal, is installed in accordance with the Installation Instructions. • If a loud continued vibration occurs during operation This water heater must be installed and serviced by a qualified person.
  • Page 2 An electronic copy of these Owner’s Guide and Installation Instructions can be downloaded from rheem.com.au. Rheem Australia Pty Ltd is the supplier of the Rheem range of continuous flow gas water heaters, manufactured in Japan by Paloma Co., Ltd., a world leader in water heater technology and manufacture.

  • Page 3: Table Of Contents

    Rheem warranty. We recommend you read pages 7 to 19, and the terms of the Rheem warranty on pages 4 to 6. The other pages are intended for the installer but may be of interest.

  • Page 4: Warranty

    The decision of whether to repair or replace a faulty component is at Rheem’s sole discretion. If you require a call out and we find that the fault is not covered by the Rheem warranty, you are responsible for our standard call out charge. If you wish to have the relevant component repaired or replaced by Rheem, that service will be at your cost.
  • Page 5 3. WHAT IS COVERED BY THE RHEEM WARRANTY FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT Rheem will repair or replace a faulty component of your water heater if it fails to operate in accordance with its specifications as follows:...
  • Page 6 The Rheem warranty (set out above) is in addition to any rights and remedies that you may have under the Australian Consumer Law.

  • Page 7: Safety, Warnings, Installation Notes

    The outlet temperature setting can be up to 75°C for an 864 series water heater or up to 50°C for an 866 series water heater. If an 864 series 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 and possibly higher...
  • Page 8 SAFETY, WARNINGS, INSTALLATION NOTES • Do not spray aerosols in the vicinity of this water heater while it is in operation. Propellants and gases in many aerosol sprays contain hydrocarbons which are flammable. Gases from aerosol sprays may also become corrosive when drawn into a flame. •...
  • Page 9 SAFETY, WARNINGS, INSTALLATION NOTES Mains pressure water supply The water heater is designed to operate at mains pressure by connecting directly to the mains water supply. The maximum mains water supply pressure for the water heater is 1,000 kPa. If the mains supply pressure in your area exceeds 1,000 kPa, an approved pressure limiting valve that does not have non-return valve characteristics (such as an RMC PSL series valve) must be installed.

  • Page 10: About Your Water Heater

    Other manufacturers’ controllers are not suitable to and cannot be installed with this water heater. Warning: Temperature controllers must not be fitted to this water heater (864 series) if it is installed as an in-series gas booster with a solar water heater system because water at a temperature much higher than the controller setting can be delivered.
  • Page 11 We recommend and it may be required by regulations that an approved temperature limiting device be fitted into the hot water pipe work to the bathroom and ensuite when an 864 series water heater is installed. This will keep the water temperature below 50°C at the bathroom and ensuite. The risk of scald injury will be reduced and if no controllers are installed and the preset outlet temperature setting has not been adjusted below 55°C...
  • Page 12 GAS BOOSTING FOR A SOLAR WATER HEATER The 864 series water heater may be installed as an in-series gas booster to a solar water heater. Water stored in the solar storage tank passes through the in-series gas booster when a hot tap is opened. 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.
  • Page 13 Open a hot tap (preferably the shower outlet). • Unscrew the two drain plugs, one each at the cold water inlet and hot water outlet (864 series model) or 50°C limited outlet (866 series model), on the underside of the water heater.
  • Page 14 ABOUT YOUR WATER HEATER CIRCULATED HOT WATER FLOW AND RETURN SYSTEM A Rheem 864B28 model continuous flow water heater can be installed as part of a circulated hot water flow “Circulated Hot Water Flow and Return System” and return system in a building. Refer to on page 25 for further information and notes on this type of installation.

  • Page 15: Maintenance Requirements

    Note: The major service and routine replacement of any components, if required, are not included in the Rheem warranty. A charge will be made for this work. Only genuine replacement parts should be used on this water heater. The major service includes the following actions: •...

  • Page 16: 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 Rheem warranty does not apply to a copper heat exchanger in a continuous flow water heater.

  • Page 17: Save A Service Call

    Check the items below before making a service call. You will be charged for attending to any condition or fault, °C “Terms of the Rheem Warranty” which is not related to manufacture or failure of a part (refer to on page 4).
  • Page 18 • Collector area is too small For most installations, the number of solar collectors recommended in Rheem 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 19 If the error code persists, take note of the numerical code, turn off the hot tap and turn off the controller(s). Phone Rheem Service or their nearest Accredited Service Agent to arrange for inspection.

  • Page 20: Installation - Water Heater

    The 864 series of water heater may be installed as an in-series gas booster to a solar water heater. For information relating to the function and operation of the solar water heater, refer to the Owner’s Guide and Installation Instructions supplied with the solar water heater.
  • Page 21 VENTILATION This water heater is to be installed with a Rheem coaxial flue system. The kit enables a room sealed installation, drawing air for combustion from outside of the building.
  • Page 22 Damage to the water heater caused by freezing of the pipe work to or from the water heater is not covered under the Rheem 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 23 864 series – Hot Water Outlet Depending upon its preset outlet temperature setting, an 864 series water heater can deliver hot water at a temperature up to 75°C when no temperature controller is installed and 60°C when a temperature controller is installed.
  • Page 24 Gas Booster for a Solar Water Heater The temperature limiting device used with an 864 series in-series gas booster as part of a solar water heater installation must be of a type suitable for use with both a continuous flow water heater and a solar water heater.
  • Page 25 INSTALLATION – WATER HEATER CIRCULATED HOT WATER FLOW AND RETURN SYSTEM A Rheem 864B28 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.
  • Page 26 INSTALLATION – WATER HEATER Circulated Hot Water Flow and Return Gas Continuous Flow Water Heater Circulated Hot Water Flow and Return In-series Gas Booster as part of a Solar Water Heater Installation...
  • Page 27 Other manufacturers’ controllers are not suitable to and cannot be installed with this water heater. Warning: Temperature controllers must not be fitted to this water heater (864 series) if it is installed as an in-series gas booster with a solar water heater system because water at a temperature much higher than the controller setting can be delivered.
  • Page 28 INSTALLATION – WATER HEATER WATER TEMPERATURE DIAGRAMS 864 Series - Kitchen and Bathroom Controllers 866 Series – Kitchen and Bathroom Controllers 864 Series - Kitchen Controller Only 866 Series - Kitchen Controller Only 864 Series - Bathroom Controllers Only 866 Series - Bathroom Controllers Only...
  • Page 29 INSTALLATION – WATER HEATER DIMENSIONS AND TECHNICAL DATA 864B28 Model 866B28 Natural Water heating capacity litres / min 17.5 @ 40°C rise Nominal capacity litres / min @ 25°C rise Mass Empty (unpackaged) Technical data is subject to change. Hourly Gas Min Gas Max Gas Gas Details...
  • Page 30 INSTALLATION – WATER HEATER TYPICAL INSTALLATION – INDOOR LOCATION...

  • Page 31: Connections - Plumbing

    This damage to components or blockage of filters is not covered by the Rheem warranty and a service rectification fee will be charged. A full flow gate valve or ball valve must be installed on the cold water line to the water heater.
  • Page 32 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 Rheem warranty does not cover damage of any nature resulting from failure to observe this precaution. Refer to rating...

  • Page 33: Flueing

    A sealing gasket is located at one end of the inner flue. Check all flue components to ensure the gasket is in place and properly seated. DO NOT install if any gaskets are missing. Contact Rheem Service or their nearest Accredited Service Agent if the gasket is missing.
  • Page 34 FLUEING COMPONENTS A complete flue system is comprised from the following components. horizontal flue terminal trim ring (PN 295146) (PN 295125) wall bracket condensate trap (PN 295129) (PN 295139) 90° elbow 45° elbow (PN 295147) (PN 295148) flue extensions adjustable flue extension – 560 to 890 mm (PN 295152) –...
  • Page 35 FLUEING FLUE TERMINAL LOCATION The water heater must be located to ensure that the location of the flue terminal complies with the requirements of AS/NZS 5601.1. As a guide the following requirements are extracted from the Gas Installations Standard. The distances are measured along the wall from the flue penetration. Horizontal Flue Terminal Location •...
  • Page 36 Failure to install a Condensate Trap and drain line could allow acidic flue gas condensate to enter into the water heater flue-way, causing premature failure of the water heater. Any resultant faults will not be covered by the Rheem warranty. Note: A horizontal run of flue connecting directly to a Horizontal Flue Terminal must have a gradient downward...
  • Page 37 FLUEING Condensate Trap and Condensate Drain Line Where the installation requires a Condensate Trap and condensate drain line: Remove the clamp and rubber cap from the condensate drain spigot on the water heater flue outlet assembly. Locate the Condensate Trap in a suitable position adjacent to the water heater.
  • Page 38 FLUEING HORIZONTAL FLUE RUNS There are a number of basic installation requirements which must be followed for a flue installation incorporating horizontal flue runs. Failure to observe these precautions can lead to the premature failure of the flue system and / or water heater.
  • Page 39 FLUEING Typical Installation Horizontal Flue with Multiple Vertical and Horizontal Sections Typical Installation Typical Installation Vertical Flue Vertical Flue with Vertical and Horizontal Sections...
  • Page 40 FLUEING HORIZONTAL FLUE INSTALLATION Horizontal Flueing – Directly Behind Water Heater This method of flue installation is used where the secondary flue is to penetrate and terminate immediately behind the wall on which the water heater is mounted. Do not plumb the water heater prior to this type of flue installation, as the water heater (if mounted) requires to be removed from the wall prior to the final installation of the flue.
  • Page 41 FLUEING Note: Steps 10 to 14 can only be conducted whilst the water heater is off the wall. Connect the 90° Elbow (PN 295147) to the water heater flue outlet so it is orientated behind the water heater. Fit the end of the elbow down over the water heater ◼...
  • Page 42 FLUEING Horizontal Flueing – Extended Flue Run Notes • Ensure each flue component is fully engaged and the rubber seal on the inner duct is well seated at each joint. • Each flue component is supplied with screws to connect to the adjacent flue component. The screws are located in a bag taped to the outside of the flue component.
  • Page 43 FLUEING Carefully remove the template inserted as the middle pages of this installation instructions booklet. ▪ Cut along the middle of the bold circle marked “Cut Line”. Align the top of the circular template with the mark on the wall. It may be convenient to tape the template to the wall.
  • Page 44 FLUEING Once the flue is assembled and penetrating the wall, install the Horizontal Flue Terminal and secure the termination to the flue using the sheet metal screws provided. Note: If the flue terminal position is more than 1800 mm above a safe working surface, then suitable equipment will be required to enable safe access to fit the flue terminal.
  • Page 45 FLUEING VERTICAL FLUE INSTALLATION Suitable flashing (not supplied) is required to waterproof the roof penetration. Notes • Ensure each flue component is fully engaged and the rubber seal on the inner duct is well seated at each joint. • Each flue component is supplied with screws to connect to the adjacent flue component. The screws are located in a bag taped to the outside of the flue component.
  • Page 46 FLUEING Fix a Wall Bracket after each transition to a vertical run. This is to prevent vertical loading on the elbows and offsets. Support vertical sections of flue at a distance no greater than 2 m using a Wall Bracket (PN 295128). Note: The Wall Bracket can be used to support vertical sections of flue from a ceiling by rotating the legs through 90°.
  • Page 47 FLUEING MULTIPLE WATER HEATER FLUE INSTALLATION Where multiple water heaters are installed, each water heater must be individually flued to the outside. A common flue system MUST NOT be used. For a multiple unit installation, the water heater is certified for installation with zero clearance between adjacent water heaters.
  • Page 48 FLUEING MULTIPLE WATER HEATER CONDENSATE TRAP AND CONDENSATE DRAIN LINE INSTALLATION Depending upon the type of installation, it may be necessary to install a Condensate Trap and condensate “Draining the Condensate” drain line to each water heater. Refer to on page 36. The drain line from each Condensate Trap may be: •...
  • Page 49 FLUEING Warning: Failure to fill with water may cause flue gasses to escape through the condensate trap. The condensate trap should be regularly checked to ensure it is filled with water, replenishing when required. Notes Consideration must be given to the material used for a condensate drain line and to where the drain line discharges.

  • Page 50: Connections - Electrical

    Wiring Rules AS/NZS 3000 and all local codes and regulatory authority requirements. Warning: Temperature controllers must not be fitted to this water heater (864 series) if it is installed as an in-series gas booster with a solar water heater system because water at a temperature much higher than the controller setting can be delivered.
  • Page 51 CONNECTIONS – ELECTRICAL WIRING DIAGRAM Wiring Diagram – 864, 866 Series B28 Models...

  • Page 52: Ez Link System Dual Installation

    The second water heater will only operate when the hot water demand exceeds the capacity of the first water heater to supply. The EZ Link system is suitable for installation with Rheem 864 and 866 series B28 model gas continuous flow water heaters. The EZ Link Kit PN 299291 is required for the installation.
  • Page 53 866 series B28 model water heaters with the EZ Link system. Warning: Temperature controllers must not be fitted to a water heater (864 series) if it is installed as an in-series gas booster with a solar water heater system because water at a temperature much higher than the controller setting can be delivered.
  • Page 54 EZ LINK SYSTEM DUAL INSTALLATION EZ LINK CABLE CONNECTION ‘Control Board with EZ Link Connection’ The references in steps 5 to 9 are to the diagram on page 55. To connect the EZ Link cable to the water heaters: Close any hot taps and ensure the burners on both water heaters are not operating. Switch off the electrical supply at the power outlet to each water heater.
  • Page 55 EZ LINK SYSTEM DUAL INSTALLATION Carefully replace the plastic protective cover over the front of the PCB board to each water heater. Secure in position by engaging the three spigots in the PCB support housing through the three holes in the protective cover’s top side and right side.
  • Page 56 EZ LINK SYSTEM DUAL INSTALLATION Typical Two Unit Manifold with EZ Link Connection...

  • Page 57: 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). •...
  • Page 58 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 59 Note: If an 864 series model is installed as a gas booster for a solar water heater, then during this procedure the temperature of the water entering the gas booster must be below 58°C. Otherwise the gas burners will not ignite and the operational gas pressures cannot be measured.
  • Page 60 COMMISSIONING Note: While the MIN button is pressed, the gas pressure will at first increase then decrease, cycling between an upper gas pressure limit (59 on the LED display) and a lower gas pressure limit (01 on the LED display). 14.
  • Page 61 Note: Australian Standard AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in potable water. When the 864 series water heater is used as an in-series booster for a solar water heater it can satisfy the AS 3498 requirements provided it is energised, the booster preset outlet temperature setting is at least 70°C, and that a remote temperature controller is not used.
  • Page 62 The MAX and MIN buttons are located to the left of the DIP 1 and DIP 2 set of DIP switches. 864 series The increments are 40°C, 42°C, 45°C, 50°C, 55°C, 60°C, 65°C, 70°C, 75°C.
  • Page 63 The maximum outlet temperature may be adjusted to compensate for temperature losses in the pipe work between the water heater outlet and fixtures used primarily for personal hygiene. This procedure cannot be conducted on an 864 series water heater. Warnings •...
  • Page 64 COMMISSIONING Outlet Temperature Adjustment To adjust the outlet temperature: Switch on the electrical supply at the power outlet to the water heater. Locate the first hot tap in the hot water pipe work after the water heater used primarily for personal hygiene. Turn on the hot tap.
  • Page 65 COMMISSIONING Press the MAX button once to increase the outlet temperature setting to the next increment. The MAX button is located to the left of the DIP 1 and DIP 2 set of DIP switches and in between the MIN (top) and Adjuster (bottom) buttons.

  • Page 66: Draining The Water Heater

    Open a hot tap (preferably the shower outlet). • Unscrew the two drain plugs, one each at the cold water inlet and hot water outlet (864 series model) or 50°C limited outlet (866 series model), on the underside of the water heater.
  • Page 67 This page is intentionally blank.
  • Page 68 Revision Date: 2024 April (41-41377-00) 122357 Rev-01...

This manual is also suitable for:

866 series864b28866b28

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