Rinnai Demand Duo Operation & Installation Manual
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Rinnai Demand Duo Operation & Installation Manual

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Demand Duo Systems
Operation & Installation Manual

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  • Page 1 Demand Duo Systems Operation & Installation Manual...
  • Page 2 Congratulations on the purchase of your Rinnai Demand Duo System. We trust you will have many years of comfort and enjoyment from your appliance. BEFORE USING THIS APPLIANCE Before proceeding with the operation or installation read this manual thoroughly and gain a full IMPORTANT understanding of the appliance, to ensure safe and correct use.

  • Page 3: Table Of Contents

    Gas Supply ���������������������������������������������������������������������������������������������������������������������������������������������������������������������� 31 Electrical Supply �������������������������������������������������������������������������������������������������������������������������������������������������������������� 31 Filling Instructions ................................32 Starting Instructions ................................32 Demand Duo Principle of Operation ..........................32 Thermostatic Controller Operation ..........................33 Demand Duo Preventative Maintenance ......................... 33 Tank ��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 33 Primary Pump ����������������������������������������������������������������������������������������������������������������������������������������������������������������� 33 Heavy Duty (HD) Heat Source ............................

  • Page 4: Warnings & Safety

    All Rinnai Demand Duo (DD) systems and components are Watermark Certified by SAI Global as applicable. The Rinnai DD1 model is certified as a gas storage water heater by the Australian Gas Association (AGA). AGA Certification applies to DD1 models only. AGA Certification does not apply to other DD models in this manual.

  • Page 5: Notice To Victorian Consumers

    Rinnai. Take care of not to touch the power plugs with wet hands. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.

  • Page 6: Scald Hazards

    Your local plumbing authority may already require that these be fitted. Contact your installer or local plumbing authority if in doubt. Never…. Leave a toddler in the care of another child. They may not understand the need to have the water temperature set at a safe level. Rinnai HW Demand Duo Systems OIM...

  • Page 7: Important Information

    If the valve dribbles or leaks continuously, operate the easing gear for a few seconds. This may dislodge any foreign matter and stop leakage. If leakage does not stop Contact Rinnai to arrange inspection by a qualified person.

  • Page 8: Care & Maintenance

    Rinnai service network personnel are fully trained and equipped. If your Rinnai appliance requires servicing contact Rinnai as per the details on the back page of this manual. Rinnai recommends that this commercial appliance be inspected and serviced by a qualified person every 12 months.
  • Page 9 If this is not the case, the temperature may need to be increased. Contact your installer or Rinnai to discuss adjusting the thermostat. No water from the hot tap? Restriction in the hot tap or failure of the cold water supply to the heater.

  • Page 10: Installation Instructions

    INSTALLATION INSTRUCTIONS These instructions apply to the Demand Duo (DD) range of Rinnai hot water systems ranging from one Heavy Duty continuous flow water heater coupled with one storage tank up to 12 heavy Duty continuous flow water heaters coupled with multiple tanks:...

  • Page 11: Hd28I, Hd210I (Internal Models)

    AS/NZS 5601-2010 ‘Gas Installations’ stipulates a minimum horizontal clearance of 500mm between a building structure and obstruction facing the terminal. For Rinnai External continuous flow water heaters such a building structure must ‘obstruct’ the full front cover height of the appliance, or extend vertically above and below the front cover.

  • Page 12: Horizontal Flue Terminal Clearances (Extract From As/Nzs 5601)

    For minimum clearances not addressed above acceptance should be obtained from the Technical Regulator. Minimum clearances d and e also apply to any combustion air intake openings of appliances. FIGURE 6.2 (in-part) LOCATION OF FLUE TERMINALS OF BALANCED FLUE, ROOM-SEALED, FAN-ASSISTED OR OUTDOOR APPLIANCES Rinnai HW Demand Duo Systems OIM...

  • Page 13: Co-Axial Flueing For Internal Models

    The Rinnai Flueing system must be installed in accordance with the instructions supplied with the flue terminal. Non Rinnai flueing systems MUST NOT be used. The Rinnai internal flueing system is highly versatile and makes installation of an internal water heater simple and convenient.

  • Page 14: Multiple Flue Terminals

    MULTIPLE FLUE TERMINALS Dimension 'H' in AS/NZS 5601 Figure 6.2 does not apply when multiple Rinnai external water heaters of the same model are installed on the same vertical face with flue terminals at the same height. Under these conditions...

  • Page 15: Installation Options

    INSTALLATION INSTRUCTIONS INSTALLATION OPTIONS The Rinnai Commercial Common Flue System is suitable for the Rinnai Internal Commercial Gas Continuous Flow Water Heaters (listed on the cover of this manual) in accordance with the flue design options outlined in the AS/NZS 5601.1 Appendix titled ‘Flue Design'. Figure 1 & Figure 2 below, illustrate typical application principles.

  • Page 16: Assembly

    Demand Duo 2 – Demand Duo 10 A Rinnai Demand Duo is supplied in modules. The storage tank(s) are separate and the heat source is made up of either 2 or 3 HD continuous flow units plumbed in parallel and mounted on a dedicated and lightweight frame.
  • Page 17 The tank(s) and the primary pump must be installed as close as possible to the heat source to minimise pipe runs. A Demand Duo PLUS system comes complete with the primary pump mounted underneath the water heaters which allows the tank(s) to be very close to the heat source.
  • Page 18 Ensure primary pump(s) are plugged into the controller and the controller is plugged into an available Socket Outlet. Socket Outlets will need to be provided to match the product you are installing. If you have a Demand Duo then Socket Outlets will need to be provided for all water heaters and controllers. If you have a Demand Duo PLUS then only one Socket Outlet per row of heaters will need to be provided.
  • Page 19 ● Ensure the thermistor is securely fitted to the well in the tank. Thermistor Wiring ● Ensure primary pump(s) are securely plugged into the temperature controller and NOT plugged directly into a Socket Outlet. Figure 6. Demand Duo PLUS (Additional Tank) Install provided relief valves Additional heat Heat source...

  • Page 20: Specifications

    ALL HT 575 PTR valves are rated at 850 kPa - RA Part No. 11004782 DD1 250L only tank supplied with 32mm brass plug to plug one of the unused cold inlet ports. NOTE Rinnai HW Demand Duo Systems OIM...
  • Page 21 SRAINER COLD EXPANSIVE NOT INCLUDED VALVE NON RETURN VALVE ISOLATION VALVE 600 DIA 32mm PORTS 20mm GAS CONNECTION WALL AS PER GAS CODE PLUG UNUSED COLD INLET PORT WITH BRASS PLUG 32MM SUPPLIED WITH TANK. NOTE Rinnai HW Demand Duo Systems OIM...
  • Page 22 SRAINER COLD EXPANSIVE VALVE NON RETURN VALVE NOT INCLUDED ISOLATION VALVE 32mm PORTS 600 DIA 20mm GAS CONNECTION WALL SERVICE SPACE PLUG UNUSED COLD INLET PORT WITH BRASS PLUG 32MM SUPPLIED WITH TANK. NOTE Rinnai HW Demand Duo Systems OIM...
  • Page 23 SPECIFICATIONS DD1 250e / 250L & 315L 850 kPa PTR INCLUDED 20mm GAS CONNECTION PLUG UNUSED COLD INLET PORT WITH BRASS PLUG 32MM SUPPLIED WITH TANK. NOTE Rinnai HW Demand Duo Systems OIM...
  • Page 24 SPECIFICATIONS DD1 210e 250L & 315L 850 kPa PTR INCLUDED CONDENSATE CONNECTION 20mm GAS CONNECTION PLUG UNUSED COLD INLET PORT WITH BRASS PLUG 32MM SUPPLIED WITH TANK. NOTE Rinnai HW Demand Duo Systems OIM...
  • Page 25 FLUED THRU ROOF OPTION FLUED THRU WALL FLUED THRU WALL NEXT TO TANK OPTION 32mm PORT INCLUDED CONDENSATE CONNECTION 20mm GAS CONNECTION PLUG UNUSED COLD INLET PORT WITH BRASS PLUG 32MM SUPPLIED WITH TANK. NOTE Rinnai HW Demand Duo Systems OIM...
  • Page 26 2080 1465 1465 1855 1855 1855 E (Diameter) Hot/cold/return port PTR port (s) Sensor well port 850 kPa PTR Valves x 2 Ø600 Sensor Well 850 kPa PTR Valves x 2 Sensor Well 1914 Rinnai HW Demand Duo Systems OIM...
  • Page 27 SPECIFICATIONS Demand Duo with multiple gas water heaters – Drawing and Specifications (All dimensions are in mm) DD model Primary Total system Total system Number of Inclusions pump weight - 250L weight - 315L tanks tank tank (Kgs) tank (Kgs)
  • Page 28 SPECIFICATIONS Typical installation for Demand Duo PRIMARY PUMP(S) MUST BE PLUGGED INTO THE CONTROLLER AND NOT AN AVAILABLE SOCKET OUTLET. NOTE Rinnai HW Demand Duo Systems OIM...
  • Page 29 SPECIFICATIONS Demand Duo PLUS with multiple gas water heaters – Drawing and Specifications (All dimensions are in mm) Total system Total system Primary Number DD model weight - 250L weight - 315L Inclusions pump of tanks tank tank (Kgs) tank (Kgs)
  • Page 30 SPECIFICATIONS Typical installation for Demand Duo Plus PRIMARY PUMP(S) MUST BE PLUGGED INTO THE CONTROLLER AND NOT AN AVAILABLE SOCKET OUTLET. NOTE Rinnai HW Demand Duo Systems OIM...

  • Page 31: Installation Handover Manual

    Return Pump • A secondary or building return pump may be installed in conjunction with the Rinnai Demand Duo hot water system. Pump should be sized for minimal temperature loss around the ringmain. Pump must have a check valve on the discharge.

  • Page 32: Filling Instructions

    Do not turn on pump / water heater before cylinder and water heater are completely full of water. • Flush cold water inlet pipe to remove any debris before final connection to cold water inlet on Rinnai Demand Duo cylinder.

  • Page 33: Thermostatic Controller Operation

    • Valve may be operating if water temperature in tank is close to 99°C. If this is the case thermostatic controller or other heating equipment has failed to operate correctly. Contact Rinnai service department. • If pressure and temperature are low but valve is leaking, pull the lever for up to 30 seconds, as some foreign material may be jammed in the valve seat.

  • Page 34: Heavy Duty (Hd) Heat Source

    • In jobs that operate for long hours and/or in dusty or smoky environments the combustion air fan may become dirty. This may be indicated by fault 10. Contact Rinnai Service. • Internal heaters may operate for a short period of time and then stop. This can be caused by the flueing not DipSW1 being pushed together properly and exhaust gases are re-entering the inlet air.
  • Page 35 FAULT FINDING The Rinnai Continuous Flow water heaters have self diagnostic capability. If a fault occurs, an Error Code will flash on the status monitor or inbuilt controller. If you have Temperature Controllers, this assists with diagnosing the fault, and may enable you to overcome a problem without a service call. Please quote the code displayed when enquiring about service.

  • Page 36: Ringmain Pump

    (or poor pipework insulation). Investigate valves and operation of pump (same procedure as primary pump). SERVICE Rinnai recommend that all commercial water heater installations have a service arrangement. Annual services are recommended at a minimum. Refer to the back cover for contact information. Rinnai...

  • Page 37: Details

    Yes / No / NA MECS/Cascade Staging System wiring completed? YES / No / NA Parameters Gas Pressure (@1.13-2.75kPa–NG) / @2.75kPa-LPG) • Static • Running Inlet Water Pressure (kPa) Permanent Power Supply (V/Phase/Hz/A) 240/1/50 Rinnai HW Demand Duo Systems OIM...
  • Page 38 5.0m in any direction from any air duct intake. • Warranty: https://www.rinnai.com.au/wp-content/uploads/2018/02/15401043-V6-Commercial-Warranty-Booklet.pdf • Installation of system to comply within Rinnai installation guidelines and relevant codes • Drainage: Provide appropriately designed drainage system in compliance to applicable building codes and regulations to prevent property and equipment damage. Customer Representative...
  • Page 39 NOTES Rinnai HW Demand Duo Systems OIM...

  • Page 40: Contacts

    Help Line. Rinnai recommends that this appliance be serviced every year. With our policy of continuous improvement, we reserve the right to change, or discontinue at any time, specifications or designs without notice. PN15401029 07-001 HW Demand Duo Systems OIM Issue 14 - October 2021...

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