Rinnai INFINITY 26i Service Manual
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Rinnai INFINITY 26i Service Manual

Infinity high capacity continuous flow gas hot water system
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INFINITY 26i and HD50i
SERVICE MANUAL
Infinity High Capacity Continuous Flow Gas Hot Water System

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Summary of Contents for Rinnai INFINITY 26i

  • Page 1 INFINITY 26i and HD50i SERVICE MANUAL Infinity High Capacity Continuous Flow Gas Hot Water System...
  • 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...
  • 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

    17. Gas Conversion Procedure ..................35 18. Dismantling for Service ..................44 19. Exploded Diagram ....................50 20. Parts List ....................... 54 21. SERVICE CONTACT POINTS ................58 Infinity REU-V2632FFU / HD200I REU-V2632FFUC - iii - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • 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-V2632FFU / HD200I REU-V2632FFUC - iv - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 6: Introduction

    Features • The Infinity 26i and HD50i NEVER RUN OUT of hot water. Whilst electricity, water and gas supplies are connected, hot water is available whenever hot water taps are open. • Built into the main micro-processor is the facility to LIMIT THE MAXIMUM TEMPERATURE of the hot water supplied.

  • Page 7: Specifications

    Note 1: The default factory setting is 55ºC for the Infinity26i, and 65°C for HD50i. 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: 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-V2632FFU / HD200I REU-V2632FFUC - 3 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 9: Water Flow Rates And Pressures

    M = 60 x ( 47 / (4.2 x 10) ) = 67 l/min. Since 67 is greater than 26 this flow rate is mixed. This result corresponds with the value in Table 1. Table 1: Approximate Water Flows & Gas Usage - Rinnai Infinity 26i and HD50i - Preset Table Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 4 - Issue 1 - 8/09/03 ©Rinnai...
  • Page 10 Table 1. Approx. Water Flows & Gas Usage - Rinnai 26i and HD50i P reset Temp. Less than 60°C. Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 5 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 11 Approx.Water Flows & Gas Usage -Rinnai Infinity26i and 50i Preset Temp .Greater than or equal to 60°C Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 6 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 12 Water Pressure The water pressure vs flow characteristics are as follows: WATER PRESSURE/FLOW RATE INFINITY 26i AND HD50i 37 -55 INFINITY 26i AND HD50i:60 WATER PRESSURE(bar) Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 7 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 13: Dimensions

    4. Dimensions Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 8 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 14: 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-V2632FFU / HD200I REU-V2632FFUC - 9 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • 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-V2632FFU / HD200I REU-V2632FFUC - 11 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • 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-V2632FFU / HD200I REU-V2632FFUC - 12 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 18: Cutaway Diagram

    6. Cutaway Diagram Infinity 26i and 50i Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 13 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 19: Operational Flow Chart

    7. Operational Flow Chart Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 14 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 20: 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-V2632FFU / HD200I REU-V2632FFUC - 15 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 21: Main Components

    The water flow and bypass valves are a combined assembly on the cold water inlet of the appliance. Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 16 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 22 • A combustion chamber. Integrated into the combustion chamber front panel are the flame rod and two ignition electrodes. Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 17 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 23: Time Charts

    10. Time Charts Infinity 26i and HD 50i Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 18 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i - 18 -...

  • Page 24: Wiring Diagram

    11. Wiring Diagram AC 230V Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 19 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 25: Dip Switch Settings

    12. Dip Switch Settings WARNING: Dip Switch settings must only be changed by an authorised person. Dip Switch Settings for Infinity 26i and HD50i Dip Switch Settings for Infinity 26i and HD50i Note: Unit must be specially converted for delivery at 85 C for REU-V2632FFUC models only.

  • Page 26: Fault Finding

    (page 31) Dismantling for Service Detailed information on how to remove and replace components. (page 41) Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 21 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i -21- Issue 1 08/04 Infinity 26i and HD50i...
  • Page 27 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-V2632FFU / HD200I REU-V2632FFUC - 22 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 28: Component Circuit Value Tabl . E / And Checks

    Solenoid Valve 2 B-Bk 1.7~2.1k DC80~100V Solenoid Valve 3 Br-Bk 1.7~2.0k B-Br 16~18 Transformer W-Bk AC90~110V Valve Heater 50~56k Valve Heater 444~510k and Square Heater Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 23 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 29: Component And Circuit Checks

    If normal, proceed to Faulty: Replace PCB. b.) Disconnect connector (J ) and measure resistance between both terminals of the sparker. Normal: 1M If not sparking, adjust or replace ignition plug. Faulty: Replace Sparker. Infinity 26i and HD50i - 24 - Issue 1...
  • Page 30 If normal,, proceed to Faulty: Replace Solenoid Valve 2. Measure voltage between Blue and Black of Solenoid Valve connector. Normal: DC80~100V If normal, proceed to Thermal fuse Circuit. Faulty: Replace PCB. Infinity 26i and HD50i - 25 - Issue 1...
  • Page 31 Normal: Voltage AC5~150V If normal, replaced PCB Faulty: Replace Flame Rod. c.) Check if the Flame Rod is securely fitted. Normal: replace the PCB Faulty: Adjust the fitting of the Flame Rod Infinity 26i and HD50i - 26 - Issue 1...
  • Page 32 Measure voltage between Yellow - Black of relay connector (B 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). Infinity 26i and HD50i - 27 - Issu e 1...
  • Page 33 Circuit break: Resistance >1M Short circuit: Resistance > 1 Normal: Check Heat exchanger outlet thermistor Faulty: Replace heat exchanger outlet thermistor. Note: For controller readout of thermistor temperature whilst operational refer maintenance monitor. Infinity 26i and HD50i - 28 - Issu e 1...
  • Page 34 Measure the voltage between red and red on the transmission connector (F Normal: AC207~264V If normal proceed to b.). Faulty: Check if the voltage on fuse terminals is 207~264V. Infinity 26i and HD50i - 29 - Issu e 1...

  • Page 35: Remote Control

    Faulty: Because normal voltage is not given due a short circuit, despite the PCB being in normal state, check Water Flow Servo circuit. If solution is not given from the above replace PCB. Infinity 26i and HD50i - 30 - Issue 1...

  • Page 36: 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 26i and HD50i use Maintenance Numbers 1-12. Display Monitor Contents Contents Units...
  • Page 37 Press the ON/OFF button again while holding the Water Temperature “UP” (Hotter) button. • This feature will automatically shut down after 3 minutes. - 32 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 38: Gas Pressure Setting Procedure

    Set the Infinity to 'Forced Low' combustion by setting No. 7 dipswitch of the bottom (SW2) set of dip switches to 'ON'. (fig.3) 10) Check the burner test point pressure. - 33 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 39 DURING PRESSURE TESTING OF THE INSTALLATION ENSURE GAS VALVE SITUATED BEFORE UNIT IS SHUT OFF. FAILURE TO DO SO MAY RESULT IN SERIOUS DAMAGE TO THE APPLIANCE AND POSSIBLE INJURY. - 34 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 40: Gas Conversion Procedure

    17. Gas Conversion Procedure Gas Conversion Method 101-560-000 101-559-000 - 35 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 41 - 36 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 42 N.G. Propane - 37 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 43 N.G. Propane 10.8 - 38 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 44 Anti Frost Heater Installation Anti Frost Heaters come as standard on ALL Rinnai Infinity and Heavy Duty water heaters sold in the UK. They will not need to be installed on site. The diagram on the following page shows where the elements are located.
  • Page 45 - 40 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 46 18. “Removal of Thermal Fuse” ..........49 Unless otherwise stated, re-assembly is the reverse of dismantling. - 41 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 47: Removal Of The Front Panel

    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. - 42 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 48: Removal Of Transformer

    Removal of the manifold and burner unit a. Remove high tension cord and flame rod. b. Remove 2 pin connection of the solenoid valve c. Remove manifold. - 43 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 49: Dismantling For Service

    Remove combustion chamber front panel. b. Remove burner unit. d. Pull off connectors for gas control modulation valve and solenoid valve. c. Pull off burner unit - 44 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 50: Removal Of Flame Rod And Spark Plug

    12) Removal of air intake thermistor a. Remove fan motor b. Remove 2 pin connector of inlet thermistor c. Remove inlet thermistor (care with O-ring) d. Thermistor - 45 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 51: Removal Of Bypass Servo

    Removal of inlet water connection c. Anti Frost switch g. Remove bypass servo and water flow servo h. Remove fitting screws of bypass servo - 46 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 52: Removal Of Anti Frost Heater

    Remove 2 pin connector of solenoid valve. c. Remove joint bracket d. Remove connection joint from the fan motor e. Remove fan motor screw Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 47 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 53: Removal Of Heat Exchanger

    Remove thermal fuse, over heat switch, sparker, hex thermister and back pressure joint. k. Remove fixing screws of the heat exchanger unit Remove heat exchanger screws Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 48 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 54: Removal Of Thermal Fuse

    Remove Thermal Fuse After removal of thermal fuse fitting procedure is as follows: Heat Exchanger Front Heat Exchanger Rear Heat Exchanger Left Heat Exchanger Right Infinity REU-V2632FFU / HD200I REU-V2632FFUC - 49 - Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 55: Exploded Diagram

    19. Exploded Diagram - 50 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 56 - 51 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 57 - 52 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 58 - 53 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 59: Parts List

    222-513-000 FAN MOTOR Assy U245-753 FAN CASING Assy U245 -555 CONNECTION, Fan BH29-606X08 PACKING, Fan Conn. U245-750 FAN MOTOR U245-753 BELL MOUTH U245-558X01 - 54 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 60 HOLDING PLATE, Large CP-90172 MOUNT BKT, Fuse U217-676X02 SWITCH, Frost Sensor 234-540-000 U242-511 HEATER Assy, A/Frost U245-775 235-308-000 HEATER, Valve U245-776 MOUNTING BRACKET, Htr CF29-742X01 - 54 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 61 M10B-2-14 O-RING M10B-2-7 520-281-010 520-043-010 O-RING M10B-1-24 WASHER C36E1-6 CONVERSION KIT Nat. Gas 923L2130NG0 CONVERSION KIT LPG 923N2130LPG INSTALLATION AND USER INSTR U245-790 - 55 - Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...
  • Page 62 Notes - 57- Infinity REU-V2632FFU / HD200I REU-V2632FFUC Issue 1 - 8/09/03 ©Rinnai Infinity 26i and HD50i...

  • Page 63: Service Contact Points

    SERVICE CONTACT POINTS Rinnai Rinnai UK LTD. 9 Christleton Court Manor Park Runcorn Cheshire WA7 1ST Tel. 01928 531870 Fax. 01928 531880 E-mail. info@rinnaiuk.com Web. www.rinnaiuk.com -58- Infinity 26i and HD50i...

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