Rinnai REU-V1620WG Service Manual
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Rinnai REU-V1620WG Service Manual

High capacity continuous flow gas hot water system
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See also: Operation & Installation Manual
INFINITY 16 REU-V1616W
V1200 REU-V1620W
INFINITY 18 REU-V2018W
INFINITY 20 REU-V2020W
SERVICE MANUAL
Rinnai High Capacity Continuous Flow Gas Hot Water System
NOTE: This manual does not apply to models: REU-V1620WG, REU-V1620WB, REU-V2024WG, REU-V2024WE,
REU-V2426WB, REU-V2626WG, REU-VM2630WD, REU-VM2630WC, REU-V2632FFUG, REU-VM2632FFUC

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Summary of Contents for Rinnai REU-V1620WG

  • Page 1 INFINITY 16 REU-V1616W V1200 REU-V1620W INFINITY 18 REU-V2018W INFINITY 20 REU-V2020W SERVICE MANUAL Rinnai High Capacity Continuous Flow Gas Hot Water System NOTE: This manual does not apply to models: REU-V1620WG, REU-V1620WB, REU-V2024WG, REU-V2024WE, REU-V2426WB, REU-V2626WG, REU-VM2630WD, REU-VM2630WC, REU-V2632FFUG, REU-VM2632FFUC...
  • 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 All rights reserved Produced by Technical Services Department 2005 - Issue 2. No portion or part of this manual may be copied without prior permission from Rinnai Australia. Rinnai Australia takes no responsibility for the accuracy or otherwise of information...

  • Page 4: Table Of Contents

    20. Dismantling for Service ..................37 21. Exploded Diagram ....................42 22. Parts List ........................ 46 REU-V1616W ........................47 REU-V1620W ........................50 REU-V2018W ........................53 REU-V2020W ........................56 SERVICE CONTACT POINTS ................60 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- iii - Issue 2 - 21/03/06 ©Rinnai...

  • Page 5: 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-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- iv - Issue 2 - 21/03/06 ©Rinnai...

  • Page 6: Introduction

    1. Introduction The Rinnai V-Series hot water units represents the latest technology in continuous flow, temperature controlled hot water. Features • The Infinity 16, V1200, Infinity 18 and Infinity 20 NEVER RUNS OUT of hot water. Whilst electricity, water and gas supplies are connected, hot water is available whenever hot water taps are open.

  • Page 7: Specifications

    Note 1: The default factory setting is 50°C or 55º C for REU-V1616W / REU-V1620W. The unit can be ordered from Rinnai to be pre-set to any of the other temperatures listed. The unit can be pre-set to any of the temperatures listed by a suitably qualified person.
  • Page 8 Note 1: The default factory setting is 50º C or 55°C for REU-V2018W / REU-V2020W. The unit can be ordered from Rinnai to be pre-set to any of the other temperatures listed. The unit can be pre-set to any of the temperatures listed by a suitably qualified person.
  • Page 9 ** The TPP is measured with the cover off the appliance at the regulator test point with supply pressures of 1.13 kPa (NG) and 2.75 kPa (Propane). Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 4 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 10: Water Flow Rates And Pressures

    M = 60 x ( 28 / (4.2 x 10) ) = 40 l/min. Since 40 is greater than 20 (18) this flow rate is mixed. This result corresponds with the value in Table 1. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 5 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 11 Table 1: Approximate Water Flows & Gas Usage - REU-V1616W/V1620W/V2020W Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 6 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 12 As seen in the table below a minimum supply pressure of 80 kPa is required to operate at the rated flow of 16 L/min. In an actual installation, pressure losses in the plumbing system also need to be considered. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 7 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 13: Dimensions

    4. Dimensions REU-V1616W / REU-V1620W Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 8 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 14 REU-V2018W / REU-V20202W Convector 318H - 9 - ©Rinnai...

  • Page 15: 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 16: Cutaway Diagram

    Flame Rod Water Flow Sensor Water Connecting Pipe Main Burner Surge Protector Hot Water Connecting Pipe Combustion Chamber Front Pressure Relief Valve By-pass Pipe Plate Assembly Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 11 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 17 Flame Rod Water Flow Sensor Water Connecting Pipe Main Burner Surge Protector Hot Water Connecting Pipe Combustion Chamber Front Pressure Relief Valve By-pass Pipe Plate Assembly Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 12 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 18: Operational Flow Chart

    7. Operational Flow Chart Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 13 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 19: Operation Principles

    The combustion fan will continue to operate for some time to purge the combustion chamber. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 14 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 20: Main Components

    • A combustion chamber. Integrated into the combustion chamber front panel are the flame rod and two ignition electrodes. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 15 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 21: Remote Controls

    (suggested height from floor at least 1500mm). Controllers are water resistant, however, durability is improved when positioned outside the shower recess or at least 400mm above the highest part of a sink, basin or bath. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 16 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 22 Controllers are supplied with 15 m of electrical cable. The cable wires for connection to the appliance are fitted with spade terminals. Extension cables are available from Rinnai. Alternatively, a two core sheathed (double insulated) flex with minimum cross-sectional area of 0.5 mm² can be used. Maximum cable length is 50 m.
  • Page 23 5. Replace cover of the Appliance. Ensure that the screw with the star washer is placed at the bottom right hand corner for earthing purposes. fig.1. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 18 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 24 STEP 1 for the controller moved from the kitchen to the bathroom. Then perform STEP 1 for the controller moved from the bathroom to the kitchen. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 19 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 25: Time Charts

    11. Time Charts Normal Combustion Mis-Ignition / Flame Failure Abnormal Pre-Purge (Air Supply/Exhaust Blockage) Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 20 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 26: Wiring Diagram

    12. Wiring Diagram Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 21 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 27: Dip Switch Settings

    13. Dip Switch Settings Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 22 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 28: Fault Finding

    (page 32) (page 26) Dismantling for Service Detailed information on how to remove and replace components. (page 37) Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 23 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 29 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-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 24 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 30: Component Circuit Value Table

    770 ± 77mA 290Hz / 4350rpm 195Hz / 2925rpm Gas Secondary Pressure Secondary Primary Gas Type High 2.75kPa Propane 0.81kPa 0.18kPa Natural 1.13kPa 0.88kPa 0.18kPa Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 25 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 31: Component And Circuit Checks

    If normal, proceed to Faulty: Replace Main Solenoid. Measure voltage between Pink-Black of Main Solenoid connector. Normal: DC80~100V If normal, proceed to Solenoid Valve SV Faulty: Replace PCB. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 26 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 32 Check the gas secondary pressure change when set temperature on the remote control changes from 37°C to 55°C. Normal: If secondary pressure changes, go to Water Flow Servo Circuit. Faulty: Replace Modulating Valve. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 27 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 33 ) and measure resistance between Black and Red. Ω Normal: < 1 If normal, replace PCB. Faulty: Replace Thermal Fuse if after confirming there is no damage to the appliance. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 28 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 34 Measure voltage between Black and Brown with relay connector (G ) connected (with no water flowing, water flow servo fully open). Normal: DC4~6V Faulty: Replace Water Flow Servo and Water Flow Sensor. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 29- Issue 2 - 21/03/06 ©Rinnai...
  • Page 35 Measure the voltage between white and white on the transmission connector (F). Normal: AC207~264V (11~13 Ω) If normal proceed to b.). (11~13Ω) Faulty: Check if the voltage on fuse terminals is AC207-264V. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 30 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 36: Remote Control

    Disconnect relay connector (F ) and measure resistance between Blue and Blue. Ω Normal: < 1 If normal, check wiring (AC240V circuit). Faulty: Replace Frost Sensing Switch. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 31 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 37: 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 - 5/05/09 ©Rinnai...
  • Page 38 250 = 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 - 5/05/09 ©Rinnai...

  • Page 39: Gas Pressure Setting Procedure

    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. REU-V1620WG / REU-V1620WB / REU-V1620WS / REU-V2024WG - 28 - Issue 1 - 5/05/09 ©Rinnai...
  • Page 40 DURING PRESSURE TESTING OF THE INSTALLATION ENSURE GAS COCK SITUATED BEFORE UNIT IS SHUT OFF. FAILURE TO DO SO MAY RESULT IN SERIOUS DAMAGE TO THE APPLIANCE AND POSSIBLE INJURY. - 35 -Issue 2 - 21/03/06 ©Rinnai Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W...

  • Page 41: Gas Conversion Procedure

    Follow gas pressure setting and dipswitch setting procedures (see next page). Disconnect appliance from services. Replace front cover, star washer must be on bottom right hand screw Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 36 - Issue 2 - 21/03/06 ©Rinnai...

  • Page 42: Dismantling For Service

    11. “Removal of Thermal Fuse”..........36 Unless otherwise stated, re-assembly is the reverse of dismantling. Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 37 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 43 Remove screw from sparker and take out sparker. c. Pull off high tension lead. Removal of Fan Motor a. Remove screws three (3) and pull off combustion fan. b. Remove connector (4P). Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 38 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 44 Remove two (2) screws and pull off transformer. d. Remove three (3) screws and pull off damper Removal of Manifold and burner a. Remove screws (6 + 3) and pull off manifold. - 39- Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W Issue 2 - 21/03/06 ©Rinnai...
  • Page 45 Remove four (4) screws from heat exchanger. 11) Removal of Thermal Fuse a. Pull off heat exchanger (refer item 10). b. Remove thermal fuse . Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 40 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 46 When Thermal Fuse is replaced, mount the thermal fuse as follows: Heat Exchanger RH side Heat Exchanger LH side Heat Exchanger Front Heat Exchanger Back - 41 - Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W Issue 2 - 21/03/06 ©Rinnai...

  • Page 47: Exploded Diagram

    21. Exploded Diagram Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 42- Issue 2 - 21/03/06 ©Rinnai...
  • Page 48 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W-43 Issue 2 - 21/03/06 ©Rinnai...
  • Page 49 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 44 - Issue 2 - 21/03/06 ©Rinnai...
  • Page 50 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 45- Issue 2 - 21/03/06 ©Rinnai...

  • Page 51: Parts List

    19. Parts List “REU-V1616W” on page 41 “REU-V1620W” on page 44 “REU-V2018W” on page 47 “REU-V2020W” on page 50 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 40 - Issue 2 - 23/04/09 ©Rinnai...

  • Page 52: Reu-V1616W

    BRACKET Heat Exchanger 92099548 537-502-000 TERMINAL, Flue 055-787-000 GASKET, Flue Term 580-593-000 PACKING, Flue Term 580-594-000 FAN MOTOR, Assy 92093665 222-512-000 FAN CASING, Assy 035-870-000 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 41 - Issue 2 - 23/04/09 ©Rinnai...
  • Page 53 213-001-000 BRACKET, Heater 92076123 537-174-000 SENSOR SWITCH, Low Temp 234-444-000 THERMISTOR, Inlet 92073675 233-108-000 SWITCH, Low Temp. 92089051 206-226-000 HARNESS, Fuse 290-0645000 HARNESS, Fuse 290-0646000 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 42 - Issue 2 - 23/04/09 ©Rinnai...
  • Page 54 580-180-000 O-RING 92062249 520-209-010 O-RING 92062348 520-281-010 O-RING 92071422 520-255-010 O-RING 92062207 520-193-010 O-RING 92062199 520-048-010 O-RING 92071182 520-049-010 CUSTOMER INST. 623-912-100 INSTALLATION INST. K23-912-100 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 43 - Issue 2 - 23/04/09 ©Rinnai...

  • Page 55: Reu-V1620W

    REU-V1620W REU-V1620WG-AK / REU-V1620WB-AK / REU-V1620WS-AK Part Name RA Part No. 11 Digit Code Quantity 000 Main Body (Outer Case) 92092049 000 Main Body (Outer Case) 92092050 000 Main Body (Outer Case) 92092050 001 Panel Front 92099952 019-3426000 001 Panel Front - Dune...
  • Page 56 REU-V1620WG-AK / REU-V1620WB-AK / REU-V1620WS-AK Part Name RA Part No. 11 Digit Code 114 Electrode FR 92093640 230-057-000 115 Packing Electrode RH 92086990 580-507-000 116 Electrode Holder RH 92087006 580-505-000 117 Sleeve Electrode 92087030 518-035-000 120 Heat Exchanger 92093657 314-538-000...
  • Page 57 REU-V1620WG-AK / REU-V1620WB-AK / REU-V1620WS-AK Part Name RA Part No. 11 Digit Code 705 Ignitor Bracket 537-0619000 706 Surge Arrestor 92093699 210-605-000 707 Sub Circuit Board Cover 098-1855000 708 Bracket 537-0618000 709 Elec Cord 92089051 206-226-000 710 Harness Fuse 92099959...

  • Page 58: Reu-V2018W

    130 TERMINAL, Flue 055-788-000 131 GASKET, Flue Term 580-592-000 132 PACKING, Flue Term 580-600-000 150 FAN MOTOR, Assy 92093665 222-512-000 151 FAN CASING, Assy 035-870-000 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 47 - Issue 2 - 23/04/09 ©Rinnai...
  • Page 59 716 VALVE HEATER 213-001-000 717 BRACKET, Heater 92076123 537-174-000 718 SENSOR SWITCH, Low Temp 234-444-000 719 THERMISTOR, Inlet 92062322 233-108-000 720 SWITCH, Low Temp. 92089051 206-226-000 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 48 - Issue 2 - 23/04/09 ©Rinnai...
  • Page 60 520-281-010 827 O-RING 92071422 520-255-010 828 O-RING 92062207 520-193-010 829 O-RING 92062199 520-048-010 830 O-RING 92071182 520-049-010 888 CUSTOMER INST. 623-912-100 889 INSTALLATION INST. K23-912-100 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 49 - Issue 2 - 23/04/09 ©Rinnai...

  • Page 61: Reu-V2020W

    130 TERMINAL, Flue 055-788-000 131 GASKET, Flue Term 580-592-000 132 PACKING, Flue Term 580-600-000 150 FAN MOTOR, Assy 92093665 222-512-000 151 FAN CASING, Assy 035-870-000 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 50 - Issue 2 - 23/04/09 ©Rinnai...
  • Page 62 718 SENSOR SWITCH, Low Temp 234-444-000 719 THERMISTOR, Inlet 92062322 233-108-000 720 SWITCH, Low Temp. 92089051 206-226-000 721 HARNESS, Fuse 290-0645000 721 HARNESS, Fuse 290-0646000 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 51 - Issue 2 - 23/04/09 ©Rinnai...
  • Page 63 520-281-010 827 O-RING 92071422 520-255-010 828 O-RING 92062207 520-193-010 829 O-RING 92062199 520-048-010 830 O-RING 92071182 520-049-010 888 CUSTOMER INST. 623-912-100 889 INSTALLATION INST. K23-912-100 Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 52 - Issue 2 - 23/04/09 ©Rinnai...
  • Page 64 Notes Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 59- Issue 2 - 21/03/06 ©Rinnai...

  • Page 65: Service Contact Points

    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 a service, please call our Hot Water Service Line. Rinnai recommends that U-PART Nº.

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