Rinnai REU-VR1620WG Service Manual
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Rinnai REU-VR1620WG Service Manual

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See also: Operation & Installation Manual
SERVICE MANUAL
To Suit Models:
R
G
REU-V
1620W
R
B
REU-V
1620W
R
S
REU-V
1620W
R
G
REU-V
2024W
Does NOT Suit any other Models.

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Summary of Contents for Rinnai REU-VR1620WG

  • Page 1 SERVICE MANUAL To Suit Models: REU-V 1620W REU-V 1620W REU-V 1620W REU-V 2024W Does NOT Suit any other Models.
  • Page 2 All Rinnai products are certified by the Australian Gas Association as compliant to relevant Australian Standards. Rinnai Australia Head Office is certified as complying with ISO 9001 by SAI Global. Distributed and serviced in Australia under a Quality System certified as complying with ISO 9001 by...
  • Page 3 © Copyright Rinnai Australia Pty Ltd ABN 74 005 138 769 All rights reserved Produced by Engineering & Technical Group No portion or part of this manual may be copied without prior permission from Rinnai Australia. Rinnai Australia reserves the right to make modifications and change specifications without notice.

  • Page 4: Glossary Of Terms And Symbols

    ø diameter  temperature rise above ambient modulating valve thermal efficiency thermistor temperature of incoming water temperature of outgoing water REU-V1620WG / REU-V1620WB / REU-V1620WS / REU-V20204WG ) Issue 1 - 5/08/09 ©Rinnai...

  • Page 5: Table Of Contents

    17. Maintenance Monitor / Error History ..............26 18. Dismantling for Service ..................29 19. Parts List ........................ 38 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS ..........39 REU-VR2024WG......................42 20. Exploded Diagram ....................45 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 1 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 6: Specifications

    Cables are supplied with water controllers. Alternatively, two core sheathed (double insulated) flex with minimum cross sectional area of 0.5 m² may be used. Maximum individual cable runs should not exceed 50 m. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 1 - Issue 2 - 15/06/11 ©Rinnai...
  • Page 7 Cables are supplied with water controllers. Alternatively, two core sheathed (double insulated) flex with minimum cross sectional area of 0.5 m² may be used. Maximum individual cable runs should not exceed 50 m. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 2 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 8 If the delivered hot water temperature rises above the required delivery Temperature Cutout: temperature for a number of seconds, the gas supply is stopped. Combustion Specifications Refer to dataplate on the appliance. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 3 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 9: Water Flow Rates And Pressures

    30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 110.0 120.0 160.0 200.0 300.0 Q(L/min) 11.0 12.2 13.6 15.1 16.1 17.1 18.2 19.2 20.0 24.0 24.0 24.0 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 4 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 10: Dimensions

    Hot: Length (from base) Gas: Fitting Diameter Cold: Fitting Diameter Hot: Fitting Diameter * Please note that this measurement is to the left of the centre line. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 5 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 11: Water Controllers

    MC-502RC or MC-503RC water controller. Wireless Installations Up to TWO BC-100V water controllers can be installed. The FOURTH water controllers in any installation MUST BE a MC-502RC/MC-503RC or a MC91Q. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 6 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 12 STEP 1 for the controller moved from the kitchen to the bathroom. Then perform STEP 1 for the controller moved from bathroom to the kitchen. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 7 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 13: Smartstart

    A schematic of the Smartstart® system installed in conjunction with a Rinnai continuous flow water heater and temperature controller is shown in Fig.2 below.
  • Page 14 Principle of Operation - Solar Hot Water Systems Only Figure 3 - Principle of Operation - Solar Hot Water Systems Only REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 9 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 15: Cutaway Diagram

    6. Cutaway Diagram NOTE: This diagram is of a general nature. Some details may be different on some models REU-VR1620 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 10 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 16 REU-VR2024 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 11 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 17: Operational Flow Chart

    7. Operational Flow Chart REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 12 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 18: Operation Principles

    The PCB then causes the main solenoid and solenoid valves to close and the burner is extinguished. The combustion fan will continue to operate for some time to purge the combustion chamber. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 13 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 19: Main Components

    The manifold is attached to the front of the burner module. Each bunsen burner is supplied by two injectors. • A combustion chamber. Integrated into the combustion chamber front panel are the flame rod and ignition electrode(s). REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 14 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 20: Time Charts

    10. Time Charts This Model only for the 2630 Series range) Normal Combustion Sequence Error Sequence (Ignition Flame Failure) Pre-Purge Defect Sequence REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 15 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 21: Wiring Diagram

    11. Wiring Diagram REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 16 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 22: Dip Switch Settings

    14 SOLENOID VALVE 2 Br-Bk (On the Manifold) 35∼41Ω DC11∼13V 15 SOLENOID VALVE 3 Y-Bk (LARGE) 37∼43Ω 12. Dip Switch Settings Contact Rinnai for Dip Switch Settings. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 17 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 23: Fault Finding

    Detailed information on (page 26) how to check all components. (page 20) Dismantling for Service Detailed information on how to remove and replace components. (page 29) REU-V1620WG / REU-V1620WB / REU-V1620WS / REU-V2024WG - 18 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 24 3. Check gas valves 4. Check water flow servo. 5. Check bypass servo. Anti-frost heater does not operate. 1. Check anti-frost heater components 2. Check frost sensing switch REU-V1620WG / REU-V1620WB / REU-V1620WS / REU-V2024WG - 19 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 25: Component And Circuit Checks

    If normal, proceed to b.). Faulty: Replace PCB b) Measure resistance between Main Solenoid connectors.  Normal: 37~43 If normal, proceed to Solenoid Valve SV Faulty: Replace Main Solenoid. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 20 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 26 Check the gas burner pressure changes when set temperature on the water control changes from 37°C to 55°C. Normal: Burner gas pressure changes. Go to Water Flow Servo Circuit. Faulty: Burner gas pressure does not change. Replace Modulating Valve. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 21 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 27 Note: If thermal fuse or overheat switch were faulty: a) Check heater for damage b) Confirm gas type and combustion dipswitch settings c) Confirm test point pressure. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 22 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 28 . Voltage between blue and brown wires 207 - 264V. If voltage is zero repeat a). If fuses are okay replace Surge Protector. 14. Anti-frost Heater Circuit REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 23 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 29 At Room temperature resistance should be > 1 M Cool switch to below 2°C then measure resistance.  Resistance should be < 1M Faulty: Replace Frost Sensing Switch. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 24 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 30: Gas Pressure Setting Procedure

    15. Gas Pressure Setting Procedure Refer seperate Rinnai document behind front cover of appliance. 16. Gas Conversion Procedure Refer seperate document availabe from Rinnai. REU-V1620WG / REU-V1620WB / REU-V1620WS / REU-V2024WG - 25 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 31: Maintenance Monitor / Error History

    The maintenance number will be shown in the Water Temperature display. Data will be shown in the Clock display. To select the required maintenance number, press the Water Temperature "UP" and "DOWN" buttons. REU-V1620WG / REU-V1620WB / REU-V1620WS / REU-V2024WG - 26 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 32 250 = Half open 500 = Open To return to normal operation • Press the ON/OFF button again while holding down the Water Temperature "DOWN" (Cooler) button. REU-V1620WG / REU-V1620WB / REU-V1620WS / REU-V2024WG - 27 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 33 To return to normal operation. • Press the ON/OFF button again while holding the Water Temperature “UP” (Hotter) button. • This feature will automatically shut down after 3 minuets. REU-V1620WG / REU-V1620WB / REU-V1620WS / REU-V2024WG - 28 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 34: Dismantling For Service

    13. Removal of Thermal Fuse.........34 Unless otherwise stated, re-assembly is the reverse of dismantling. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 29 - Issue 2 - 19/01/11 ©Rinnai...

  • Page 35: Removal Of The Front Panel

    2) Removal of the PCB Unit a. Remove the front panel. (Refer Item 1.) b. Remove (1) one PCB unit fixing screw and pull out forward. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 30 - Issue 2 - 19/01/11 ©Rinnai...

  • Page 36: Removal Of Sparker

    Remove high tension cord and flame rod. b. Remove 2 pin connection of the solenoid valve Remove (9) nine screws on the manifold d. Remove manifold. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 31 - Issue 2 - 19/01/11 ©Rinnai...

  • Page 37: Removal Of Flame Rod And Electrode

    Pull off connections for gas control modulation valve and solenoid valve. 6) Removal of Flame Rod and Electrode a. Remove flame rod connector and high tension lead. b. Remove flame rod and electrode. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 32 - Issue 2 - 19/01/11 ©Rinnai...

  • Page 38: Removal Of The Fan Motor

    Remove fan motor from housing via (3) three screws. Remove Sensor MR and Anti Frost Heater 9) Removal of Water Flow Servo a. Removal of Inlet Water Connection. REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 33 - Issue 2 - 19/01/11 ©Rinnai...

  • Page 39: Removal Of Outgoing Water Thermistor

    12) Removal of Anti Frost Switch Exchanger Left 13) Removal of Heat Exchanger a. Remove fixing screws of the heat exchanger unit. b. Remove Heat Exchanger from box. Heat Exchanger Right REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 34 - Issue 2 - 19/01/11 ©Rinnai...

  • Page 40: Parts List

    Some Part details may have changed since publication of this manual. Contact Rinnai to confirm spare parts details before ordering. “REU-VR1620WG / REU-VR1620WB / REU-VR1620WS” on page 39 “REU-VR2024WG” on page 42 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 3 - Issue - ©Rinnai...
  • Page 41  Electrode Holder 538-0572000  Sleeve Electrode 518-035-000  Buner Assembly 157-137-000  Heat Exchanger Assy 314-755-000  Water Connecting Tube Retainer 538-615-000  Bracket H/Exchanger Outlet 537-502-000 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 3 - Issue - ©Rinnai...
  • Page 42  Switch Thermal 234-444-000  Heater Fixing Plate 537-0440000  Hanrness Power 290-1285000  Harness Solenoid 290-1746000  Harness Sensor 290-1747000  Fuse Thermal 290-0491000 Thermal Fuse Fixing Plate 537-505-000 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- Issue - ©Rinnai...
  • Page 43 O-Ring Gas Conrol 580-180-000  O-Ring Thermistor 520-209-010  O-Ring 520-281-010  O-Ring Heat Exchanger 520-255-010  O-Ring Heat Exchanger 520-193-010  O-Ring Heat Exchanger Inlet 520-048-010  O-Ring In/Out Water 520-049-010 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- Issue - ©Rinnai...

  • Page 44: Reu-Vr1620Wg / Reu-Vr1620Wb / Reu-Vr1620Ws

    121 Water Connecting Tube Retainer 538-615-000  122 Bracket H/Exchanger Outlet 537-502-000  130 Exhaust Flue 055-788-000 131 Exhaust Opening Packing 580-592-000 132 Front Panel Seal Packing 580-600-000 Issue 2 - 19/01/11 ©Rinnai REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 39 -...
  • Page 45 719 Thermal Fuse Fixing Plate 537-505-000 720 Thermal Fuse Fixing Plate 537-0110000  721 Sensor MR 243-133-000  722 Twin Thermistor 233-278-000  725 Harness Remoter Control 290-1288000 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 43 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 46 520-281-010  827 O-Ring Heat Exchanger 520-255-010  828 O-Ring Heat Exchanger 520-193-010  829 O-Ring Heat Exchanger Inlet 520-048-010  830 O-Ring In/Out Water 520-049-010 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 44 - Issue 1 - 5/08/09 ©Rinnai...

  • Page 47: Exploded Diagram

    20. Exploded Diagram REU-VR1620WG/REU-VR1620WB/REU-VR1620WS/ REU-VR2024WG REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 45 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 48 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 46 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 49 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 47 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 50 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 48 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 51 REU-VR2024WG REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 49 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 52 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 50 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 53 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 51 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 54 REU-VR1620WG / REU-VR1620WB / REU-VR1620WS / REU-VR2024WG- 52 - Issue 1 - 5/08/09 ©Rinnai...
  • Page 55 Hot Water Service Line Tel: 1800 000 340 Rinnai has a Service and Spare Parts network with personnel who are fully trained and equipped to give the best service on your Rinnai appliance. If your appliance requires service, please call our Hot Water Service Line. Rinnai recommends that this appliance be serviced every 3 years.

This manual is also suitable for:

Reu-vr1620wsReu-vr1620wbReu-vr2024wg

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