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Rinnai Infinity 32e Service Manual

Infinity high capacity continuous flow gas hot water system
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INFINITY 32e and HD70e
SERVICE MANUAL
Infinity High Capacity Continuous Flow Gas Hot Water System
Infinity 32e and HD70e

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Summary of Contents for Rinnai Infinity 32e

  • Page 1 INFINITY 32e and HD70e SERVICE MANUAL Infinity High Capacity Continuous Flow Gas Hot Water System Infinity 32e and HD70e...
  • Page 2 Quality System Standard ISO 9001 - 1994 The Design, Development, and Manufacture of Gas Water Heating Appliances done under Rinnai’s Quality Management System is certified under the Quality Management System Standard ISO 9001. Registration Number JQ0003D Registered since: February 1994 Certified by Japan Gas Appliances Inspection Association.
  • Page 3 Produced by Rinnai Technical Services Department August 2004 - Issue 1. No portion or part of this manual may be copied without prior permission from Rinnai U.K. Rinnai U.K. reserves the right to make modifications and change specifications without notice.

  • Page 4: Table Of Contents

    19. Gas Conversion Procedure ..................41 20. Dismantling for Service ..................43 21. Exploded Diagram ....................49 22. Parts List ........................ 53 SERVICE CONTACT POINTS ................57 Infinity REU-V3232W / HD250E REU-V3232WC - iii - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • 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-V3232W / HD250E REU-V3232WC - iv - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 6: Introduction

    The Infinity 32e is delivered with a maximum preset temperature of 55 degree C and 65º C for the Heavy Duty 70e. If required, the temperature limits can be changed by a service technician.

  • Page 7: Specifications

    System(optional) Note 1: The default factory setting is 55° C for Infinity 32e and 65° C for HD 70e. The unit can be ordered from Rinnai UK 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: Sensors And Safety Devices

    * * The TPP is measured with the cover ‘off’ the appliance at the regulator test point with supply pressures of 20 mbar (NG) and 37 mbar (Propane). Infinity REU-V3232W / HD250E REU-V3232WC - 3 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 9: Water Flow Rates And Pressures

    Where M = Water flow rate in litres/minute. If M is ≤ to 32, the water is unmixed, the entire flow goes through the water heater. If M > 32 the hot water from the unit is mixed with cold water. Q = Heat energy available in kW = 56kW for the Infinity 32e and 70e °...
  • Page 10 Table 1: Approximate Water Flows and Gas Consumption - Rinnai Infinity 32e and 70e Temperature ° L/min L/hr L/min L/hr L/min L/hr Rise C thru unit 1920 13.9 1920 27.8 1920 41.7 maximum 9600 4800 3200 Temperature ° L/min L/hr...

  • Page 11: Water Pressure

    As seen in the table below a minimum supply pressure of 1.8 bar is required to operate at the rated flow of 32 L/min. In an actual installation, pressure losses in the plumbing system also need to be considered. Water Flow (L/min) (bar) Infinity REU-V3232W / HD250E REU-V3232WC - 6 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 12: Dimensions

    4. Dimensions Infinity REU-V3232W / HD250E REU-V3232WC - 7 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 13: Installation

    5. Installation External Wall Installation Water Inlet Valve Important: Refer to the current versions of the standards and regulations for installation requirements. Infinity REU-V3232W / HD250E REU-V3232WC - 8 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 14: Remote Controls

    (suggested height from floor at least 1500 mm). Controllers are water resistant, however, durability is improved when positioned outside the shower recess or at least 400 mm above the highest part of a sink, basin or bath. Infinity REU-V3232W /HD250E REU-V3232WC - 9 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 15: Remote Controller Connection

    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 16 15.Replace cover of the Appliance. Ensure that the screw with the star washer is placed at the bottom right hand corner for earthing purposes. Remote control cables fig. 3 Infinity REU-V3232W /HD250E REU-V3232WC - 11 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 17 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-V3232W /HD250E REU-V3232WC - 12 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 18: Cutaway Diagram

    7. Cutaway Diagram Infinity REU-V3232W /HD250E REU-V3232WC - 13 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 19: Operational Flow Chart

    Fan revolves for ignition Main solenoid valve ON Solenoid valve 1 ON Modulating valve ON cont. next page cont. next page cont. next page Infinity REU-V3232W /HD250E REU-V3232WC - 14 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 20 Solenoid valve 3 OFF 10 flashing Combustion faulty Modulating valve OFF Combustion indicator OFF Combustion fan OFF (after 65 seconds) HEX outgoing temp. < 60°C Infinity REU-V3232W /HD250E REU-V3232WC - 15 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 21: Operation Principles

    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-V3232W /HD250E REU-V3232WC - 16 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 22: Main Components

    • A combustion chamber. Integrated into the combustion chamber front panel are the flame rod and two ignition electrodes. Infinity REU-V3232W /HD250E REU-V3232WC - 17 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 23: Time Charts

    11. Time Charts Normal Combustion Miss-Ignition / Flame Failure Abnormal Pre-Purge (AIr Supply/Exhaust Blockage) Infinity REU-V3232W /HD250E REU-V3232WC - 18 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 24: Wiring Diagram

    12. Wiring Diagram AC 230V Infinity REU-V3232W /HD250E REU-V3232WC - 19 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 25: Dip Switch Settings

    41. Normal Combustion Forced ‘Low’ Combustion Forced ‘High’ Combustion Computer Programming Switch is always in OFF position for Infinity 32e and HD 70e Infinity REU-V3232W /HD250E REU-V3232WC - 20 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 26 Such markings appear near the data plate, located on the burner cover and or on the bypass servo wiring loom. A unit set to between 40° C and 85° C MUST BE returned to Rinnai and specifically modified to deliver 95° C.

  • Page 27: Fault Finding

    Detailed information on (page 37) how to check all components. (page 26) Dismantling for Service Detailed information on how to remove and replace components. (page 43) Infinity REU-V3232W /HD250E REU-V3232WC - 22 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 28: Item

    05 and 09 fan rotation error Water flow Check water flow servo control device error. Water flow is not controlled. Water temperature too low. Infinity REU-V3232W /HD250E REU-V3232WC - 23 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 29 4. Check water flow servo. fitted. 5. Check bypass servo. Anti-frost 1. Check anti-frost heater heater does not components operate. 2. Check frost sensing switch Infinity REU-V3232W /HD250E REU-V3232WC - 24 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 30: Component Circuit Value Table

    DC80~100V Solenoid Valve 2 Or-Bk 1.8~2.2k DC80~100V Solenoid Valve 3 Y-Bk 1.8~2.2k AC90~110V 12~21 AC12~18V Gr-Gr 2.4~4.3 Transformer AC30~50V Br-Gy 2.2~3.9 AC180~220V Y-Gy 300~530 Infinity REU-V3232W /HD250E REU-V3232WC - 25 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 31: Component And Circuit Checks

    ) and measure resistance between both terminals of the sparker. Ω Normal: > 1M If not sparking, adjust or replace ignition plug. Faulty: Replace Sparker. Infinity REU-V3232W /HD250E REU-V3232WC - 26 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 32 Faulty: Replace Solenoid Valve 2. Measure voltage between Orange and Black of Solenoid Valve connector. Normal: DC80~100V If normal, proceed to Thermal fuse Circuit. Faulty: Replace PCB. Infinity REU-V3232W /HD250E REU-V3232WC - 27 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 33 37 to 55 Normal: If secondary pressure changes, go to Water Flow Servo Circuit. Faulty: Replace Modulating Valve. Infinity REU-V3232W /HD250E REU-V3232WC - 28 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 34 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-V3232W /HD250E REU-V3232WC - 29 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 35 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. Infinity REU-V3232W /HD250E REU-V3232WC - 30 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 36 Circuit If faulty, replace Heat Exchanger Outlet Thermistor. Note: For controller readout of thermistor temperature whilst operational refer maintenance monitor (chapter 17) No. 11. Infinity REU-V3232W /HD250E REU-V3232WC - 31 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 37 Normal: <1Ω If normal go to step Electrical Fuse 13. Faulty: Replace fuse/s (3Ax2). Check for a short next time it’s turned off. Infinity REU-V3232W /HD250E REU-V3232WC - 32 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 38 Faulty: Replace transformer. Note) The above transformer voltages are meas- ured while the appliance is in standby mode - not while it is operating. Infinity REU-V3232W /HD250E REU-V3232WC - 33 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 39 PCB being in normal state, check Water Flow Servo circuit. If solution is not given from the above replace PCB. Infinity REU-V3232W /HD250E REU-V3232WC - 34 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 40 Yellow and Yellow on each conector on heater side. Ω Normal: 653 If normal, proceed to c. Faulty: Replace Anti-frost Heater B (assy). Infinity REU-V3232W /HD250E REU-V3232WC - 35 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 41 Disconnect relay connector (J ) and measure resistance between Blue and Blue. Ω Normal: < 1 If normal, check wiring (AC230V circuit). Faulty: Replace Frost Sensing Switch. Infinity REU-V3232W /HD250E REU-V3232WC - 36 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 42: Maintenance Monitor / Error History

    17. The maintenance number will be shown in the Water Temperature display. 18. Data will be shown in the Clock display. 19. To select the required maintenance number, press the Water Temperature "UP" and "DOWN" buttons. Note: Infinity 32e and HD70e use Maintenance Numbers 1-12. Display Monitor Contents Contents Units...
  • Page 43 • 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-V3232W /HD250E REU-V3232WC - 38 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 44: Gas Pressure Setting Procedure

    No. 2 dipswitch of the bottom (SW2) set of dip switches to 'ON'. (fig 3) 10) Check the burner test point pressure. fig. 3 Infinity REU-V3232W /HD250E REU-V3232WC - 39 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 45 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. Infinity REU-V3232W /HD250E REU-V3232WC - 40 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 46: Gas Conversion Procedure

    (7 screws) Note: Do not loose or damage the O-ring when reassembling. Ensure connections for the solenoid and sparker lead are made properly. Infinity REU-V3232W /HD250E REU-V3232WC - 41 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 47 Change over the gas conversion switches (1 ~ 4) on the PCB unit Reset Gas pressurs as per instructions in 18. Gas Pressure Setting Procedure. (page 39) Infinity REU-V3232W /HD250E REU-V3232WC - 42 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 48: Dismantling For Service

    11. Removal of the Thermal Fuse and OHS........47 Unless otherwise stated, re-assembly is the reverse of dismantling. Infinity REU-V3232W /HD250E REU-V3232WC - 43 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 49: Removal Of The Front Panel

    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. Infinity REU-V3232W /HD250E REU-V3232WC - 44 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 50: Removal Of The Sparkers

    Remove PCB unit (assembly). (Refer Item 2.) forward and slide to the side to remove fan. c. Remove two (2) transformer screws and pull out forward (2 screws). Infinity REU-V3232W /HD250E REU-V3232WC - 45 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 51: Removal Of The Gas Inlet, Solenoids And Flame Rod

    Remove one (1) gas control (assy) screw and pull out gas control (assy). f. Remove two (2) burner retaining screws, then remove combustion chamber front panel (9 screws). Infinity REU-V3232W /HD250E REU-V3232WC - 46 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 52: 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 Infinity REU-V3232W /HD250E REU-V3232WC - 47 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 53 Heat Exchanger Back d. Remove one (1) screw of the bi-metal overheat switch. Infinity REU-V3232W /HD250E REU-V3232WC - 48 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 54: Exploded Diagram

    21. Exploded Diagram Infinity REU-V3232W /HD250E REU-V3232WC - 49 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 55 Infinity REU-V3232W /HD250E REU-V3232WC - 50 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 56 Infinity REU-V3232W /HD250E REU-V3232WC - 51 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 57 Infinity REU-V3232W /HD250E REU-V3232WC - 52 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 58: Parts List

    GASKET, Combustion Chamber Fr. 202-156-000 Electrode 230-047-000 / Flame Rod A 580-507-000 / Flame Rod A 580-505-000 506-149-000 314-347-000 Pipes, Inlet Pipe, Out 222-371-000 Infinity REU-V3232W /HD250E REU-V3232WC - 53 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 59 HEATER - B, Anti Frost ASSY 235-265-000 CLIP, Anti-frost Heater, square AU124-618X01 BU129-821-2 OVERHEAT SWITCH 234-543-000 U211-610X01 FUSIBLE LINK ASSY CLIPS, Fusible Link 233-108-000 Infinity REU-V3232W /HD250E REU-V3232WC - 54 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 60 Infinity 32e HD 70e RUK Part No. Thermistor ANTI FROST THERMAL SWITCH 234-444-000 HEATER - C, Anti Frost ASSY 235-266-000 Main 224-277-000 Infinity REU-V3232W /HD250E REU-V3232WC - 55 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...
  • Page 61 Notes Infinity REU-V3232W /HD250E REU-V3232WC - 56 - Issue 1 - 8/09/03 ©Rinnai Infinity 32e and HD70e...

  • Page 62: Service Contact Points

    Infinity 32e and HD70e...

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