Rinnai REU-VR3237WG Service Manual
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Rinnai REU-VR3237WG Service Manual

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See also: Operation & Installation Manual
SERVICE MANUAL
To Suit Models:
R
G
REU-V
3237W
RM
REU-V
3237WC
Does NOT Suit any other Models
Infinity 32
HD 250e

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Summary of Contents for Rinnai REU-VR3237WG

  • Page 1 SERVICE MANUAL To Suit Models: REU-V 3237W Infinity 32 REU-V 3237WC HD 250e 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 Infinity REU-VR3237WG /HD250e REU-VRM3237WC - iv - Issue 1 - 19/05/09 ©Rinnai...

  • Page 5: Table Of Contents

    Gas Pressure Setting Procedure ..............25 Gas Conversion Procedure ................25 Maintenance Monitor / Error History ..............26 Dismantling for Service ..................29 Parts List ......................35 Exploded Diagram .................... 38 Infinity REU-VR3237WG / HD250e REU-VRM3237WC - v - Issue 1 - 19/05/09 ©Rinnai...

  • Page 6: Specifications

    Delivery temperatures 40°C, 42°C, 50°C, 55°C, 65°C, 75, 85, 95°C (set by combination of dip switches on PCB) NOTE: 95°C appliance must be factory converted by Rinnai. Water flow control Water flow sensor, Electronic water flow control device Maximum hot water capacity, raised @ 32 L/min 25°C...
  • Page 7 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. Infinity REU-VR3237WG / HD250e REU-VRM3237WC - 2 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 8: Water Flow Rates And Pressures

    180.0 190.0 200.0 300.0 Q(L/min) 12.1 14.8 17.1 19.1 20.9 22.4 24.1 25.5 26.9 29.3 31.6 34.0 36.0 37.0 37.7 37.7 BPS = Heat Exchanger Bypass Servo Infinity REU-VR3237WG / HD250e REU-VRM3237WC - 3 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 9: 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. Infinity REU-VR3237WG / HD250e REU-VRM3237WC - 4 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 10: Water Controllers

    MC-502RC 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 or a MC91Q. Infinity REU-VR3237WG /HD250e REU-VRM3237WC - 5 - Issue 1 - 19/05/09 ©Rinnai...
  • Page 11 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. Infinity REU-VR3237WG /HD250e REU-VRM3237WC - 6 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 12: 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 13: Cutaway Diagram

    6. Cutaway Diagram Infinity REU-VR3237WG /HD250e REU-VRM3237WC - 8 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 14: Operational Flow Chart

    7. Operational Flow Chart Infinity REU-V3237WG / HD250e REU-VM3237WC - 9 - Issue 1 - 19/05/09 ©Rinnai...
  • Page 15 Infinity REU-V3237WG / HD250e REU-VM3237WC - 10 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 16: 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. Infinity REU-VR3237WG / HD250e REU-VRM3237WC - 11 -...

  • Page 17: 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). Infinity REU-VR3237WG / HD250e REU-VRM3237WC - 12 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 18: Time Charts

    10. Time Charts Normal Combustion Sequence Error Sequence (Ignition/Flame Failure) Pre-Purge Defect Sequence Infinity REU-VR3237WG / HD250e REU-VRM3237WC - 13 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 19: Wiring Diagram

    11. Wiring Diagram Infinity REU-VR3237WG /HD250e REU-VRM3237WC - 14 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 20: Diagnostics Points

    BELOW 1Ω    Gy-Gy AC207〜264V IGNITER DC11〜13V P-Bk MAIN SOLENOID VALVE 37〜43Ω DC11〜13V R-Bk SOLENOID VALVE 1 37〜43Ω DC11〜13V SOLENOID VALVE 2 O-Bk 37〜43Ω DC11〜13V SOLENOID VALVE 3 Y-Bk 35〜41Ω Infinity REU-VR3237WG /HD250e REU-VRM3237WC - 15 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 21: Dip Switch Settings

    13. Dip Switch Settings Contact Rinnai for Dipswitch settings. Infinity REU-VR3237WG /HD250e REU-VRM3237WC - 16 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 22: Fault Finding

    Detailed information on (page 20) how to check all components. (page 26) Dismantling for Service Detailed information on how to remove and replace components. (page 23) Infinity REU-VR3237WG / HD250e REU-VRM3237WC - 17 - Issue 1 - 19/05/09 ©Rinnai...
  • Page 23 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 Infinity REU-VR3237WG / HD250e REU-VRM3237WC - 18 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 24: Component And Circuit Checks

    ) and measure resistance between both terminals of the sparker.  Normal: > 1M If normal and not sparking adjust or replace ignition plug. Faulty: Replace Sparker. - 19 - Infinity REU-VRM3237WG / HD250e REU-VRM3237WC Issue 1 - 19/05/09 ©Rinnai...
  • Page 25 Faulty: Replace Solenoid Valve 2. b.) Measure voltage between Orange and Black of Solenoid Valve connector. Normal: DC 1H3V If normal, proceed to Thermal fuse Circuit. Faulty: Replace PCB. Infinity REU-VRM3237WG / HD250e REU-VRM3237WC - 20 - Issue 1 - 19/05/09 ©Rinnai...
  • Page 26 Check the gas secondary pressure change when set temperature on the remote control ° changes from 37 to 55 Normal: If secondary pressure changes, go to Water Flow Servo Circuit. Faulty: Replace Modulating Valve. Infinity REU-VRM3237WG / HD250e REU-VRM3237WC - 21 - Issue 1 - 19/05/09 ©Rinnai...
  • Page 27 If normal, check other possible causes for flame failure (is gas valve open?, is the filter blocked? etc.). If faulty, tighten the earth lead, PCB, power cord and surge arrester. Infinity REU-VRM3237WG / HD250e REU-VRM3237WC - 22 - Issue 1 - 19/05/09 ©Rinnai...
  • Page 28 Normal: DC 4~7V If normal, proceed to 2. Faulty: Replace water flow sensor. Note: For controller readout of water flow whilst operational refer maintenance monitor (chapter 17.) No. 1) - 23 - Infinity REU-VRM3237WG / HD250e REU-VRM3237WC Issue 1 - 19/05/09 ©Rinnai...
  • Page 29 If normal, proceed to Water Flow Servo Circuit If faulty, replace Heat Exchanger Outlet Thermistor. Note: For controller readout of thermistor temperature whilst operational refer maintenance monitor (chapter 17) No. 11. - 24 - Infinity REU-VRM3237WG / HD250e REU-VRM3237WC Issue 1 - 19/05/09 ©Rinnai...
  • Page 30 Normal: Wire Colour Value  Br - W 15~35 O - W Y - W R - W If normal, proceed to a). Faulty: Replace Bypass Servo. Infinity REU-VRM3237WG / HD250e REU-VRM3237WC - 25 - Issue 1 - 19/05/09 ©Rinnai...
  • Page 31 At room temperature resistance should be > 1M . Cool switch to below 2 then  measure resistance. Resistance should be < 1M . Faulty: Replace frost sensing switch.  - 26 - Infinity REU-VRM3237WG / HD250e REU-VRM3237WC Issue 1 - 19/05/09 ©Rinnai...
  • Page 32 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. Infinity REU-VR3237WG /HD250e REU-VRM3237WC - 27 - Issue 1 - 19/05/09 ©Rinnai...
  • Page 33 0 = Closed 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. Infinity REU-VR3237WG /HD250e REU-VRM3237WC - 28 - Issue 1 - 19/05/09 ©Rinnai...
  • Page 34 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 minutes. Infinity REU-VR3237WG /HD250e REU-VRM3237WC - 29 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 35: Gas Pressure Setting Procedure

    18. Gas Pressure Setting Procedure Refer separate Rinnai document behind front cover of appliance. 19. Gas Conversion Procedure Refer separate document availabe from Rinnai. Infinity REU-VR3237WG / HD250e REU-VRM3237WC - 30 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 36: Dismantling For Service

    10. Removal of the Thermal Fuse and OHS........27 Unless otherwise stated, re-assembly is the reverse of dismantling. Infinity REU-VR3237WG /HD250e REU-VRM3237WC - 31 -...

  • Page 37: Removal Of The Front Panel

    O-rings are not lost or damamged.. 2) Removal of the PCB Unit a. Remove the front panel. (Refer Item 1.) b. Remove two (2) PCB unit fixing screws and pull out forward. - 32 - Infinity REU-VR3237WG /HD250e REU-VRM3237WC Issue 1 - 19/05/09 ©Rinnai...

  • Page 38: Removal Of The Sparkers

    4) Removal of the Combustion Fan a. Remove front panel. (Refer Item 1.) b. Remove three (3) combustion fan screws, pull forward and slide to the side to remove fan. - 33 - Infinity REU-VR3237WG /HD250e REU-VRM3237WC Issue 1 - 19/05/09 ©Rinnai...

  • Page 39: Removal Of The Gas Inlet, Solenoids And Flame Rod

    Remove two (2) burner retaining screws, then remove combustion chamber front panel (9 screws). d. Remove one (1) gas control (assy) screw and pull out gas control (assy). - 34 - Infinity REU-VR3237WG /HD250e REU-VRM3237WC Issue 1 - 19/05/09 ©Rinnai...

  • Page 40: Removal Of The Heat Exchanger

    Take out the heat exchanger unit. Refer to 10). c. Remove the thermal fuse. Note: After replacing, install the thermal fuse as in the following diagrams. Heat Exchanger RHS Heat Exchanger Front - 35 - Infinity REU-VR3237WG /HD250e REU-VRM3237WC Issue 1 - 19/05/09 ©Rinnai...
  • Page 41 Heat Exchanger Back d. Remove one (1) screw of the bi-metal overheat switch. - 36 - Infinity REU-VR3237WG /HD250e REU-VRM3237WC Issue 1 - 19/05/09 ©Rinnai...

  • Page 42: Parts List

    035-867-000 153 FAN CONNECTING BRACKET 106-649-000 154 GASKET FAN 92099942 580-580-000 400 INLET WATER 3/4 92099968 333-301-NPB 401 PLUG BAND 553-119-000 402 FILTER WATER LARGE 92083773 196-062-000 - 37 - Infinity REU-VR3237WG / HD250e REU-VRM3237WC Issue 1 - 19/05/09 ©Rinnai...
  • Page 43 811 O RING GAS CON 92072859 520-043-010 812 O RING IN/OUT WATER 92071182 520-049-010 813 O RING HEAT EXCH 92062199 520-048-010 814 O RING HEAT EXCH 92062207 520-193-010 Infinity REU-VR3237WG / HD250e REU-VRM3237WC - 38 - Issue 1 - 19/05/09 ©Rinnai...
  • Page 44 817 O RING GAS MANIFOLD 92075126 580-202-000 818 O-RING 90195165 520-300-010 821 SCREW 501-395-000 822 SCREW 501-799-000 823 SCREW 511-119-000 824 SCREW 501-403-000 888 OPERATION MANUAL(RAU) 623-753-200 889 INSTALLATION MANUAL(RAU) K23-753-200 Infinity REU-VR3237WG / HD250e REU-VRM3237WC - 39 - Issue 1 - 19/05/09 ©Rinnai...

  • Page 45: Exploded Diagram

    22. Exploded Diagram REU-V53237WG-AK / REU-V5M3237WC(65)-AK - 40 - Infinity REU-VR3237WG / HD250e REU-VRM3237WC Issue 1 - 19/05/09 ©Rinnai...
  • Page 46 REU-V53237WG-AK / REU-V5M3237WC(65)-AK - 41 - Infinity REU-VR3237WG / HD250e REU-VRM3237WC Issue 1 - 19/05/09 ©Rinnai...
  • Page 47 REU-V53237WG-AK / REU-V5M3237WC(65)-AK Infinity REU-VR3237WG / HD250e REU-VRM3237WC - 42 - Issue 1 - 19/05/09 ©Rinnai...
  • Page 48 REU-V53237WG-AK / REU-V5M3237WC(65)-AK - 43 - Infinity REU-VR3237WG / HD250e REU-VRM3237WC Issue 1 - 19/05/09 ©Rinnai...
  • Page 49 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.

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