Rinnai INFINITY REU-V2626W Service Manual

Rinnai high capacity continuous flow gas hot water system

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INFINITY REU-V2626W

HD200E REU-V2632WC

SERVICE MANUAL

Rinnai High Capacity Continuous Flow Gas Hot Water System

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Page 1 INFINITY REU-V2626W HD200E REU-V2632WC SERVICE MANUAL Rinnai High Capacity Continuous Flow Gas Hot Water System...
Page 2 Distributed and serviced in Australia under a Quality System certified as complying with ISO 9002 by Quality Assurance Services. Rinnai New Zealand has been certified to ISO 9001 Quality Assurance by Telarc. Certified to WaterMark by Quality Assurance Services. WaterMark certification is awarded to products and fittings complying with safety and water contamination standards.
Page 3 Produced by Customer Technical Services August 2003 - Issue 1. 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 contained in this manual, and reserves the right to make modifications and change specifications without notice.
Page 4: Table Of Contents
18. Gas Conversion Procedure ..................38 19. Dismantling for Service ..................42 20. Exploded Diagram ....................51 21. Parts List ........................ 55 REU-V2626W ........................56 REU-V2632WC.........................59 SERVICE CONTACT POINTS ................63 Infinity REU-V2626W / HD200E REU-V2632WC - iv - Issue 1 - 10/10/03 ©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-V2626W / HD200E REU-V2632WC - v - Issue 1 - 10/10/03 ©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 26 and the HD200E NEVER RUN 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 55ºC for REU-V2626W. 65°C for REU-V2632WC. 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. * Temperatures set at 85° C for REU-V2632W models only.
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 1.13 kPa (NG) and 2.75 kPa (Propane). Infinity REU-V2626W / HD200E REU-V2632WC - 3 - Issue 1 - 10/10/03 ©Rinnai...
Page 9: Water Flow Rates And Pressures
M = 60 x ( 46 / (4.2 x 10) ) = 66 l/min. Since 66 is greater than 26 this flow rate is mixed. This result corresponds with the value in Table 1. Infinity REU-V2626W / HD200E REU-V2632WC - 4 -...
Page 10 Approx.Water Flows & Gas Usage - REU-V2626W / REU-V2632WC All Preset Temp & Less than 60°C. Infinity REU-V2626W / HD200E REU-V2632WC - 5 - Issue 1 - 10/10/03 ©Rinnai...
Page 11 60°C Approx. Water Flows & Gas Usage- REU-V2626W/REU-V2632WC Preset Temp. Greater than or equal Infinity REU-V2626W / HD200E REU-V2632WC - 6 - Issue 1 - 10/10/03 ©Rinnai...
Page 12: Water Pressure
As seen in the table below a minimum supply pressure of 180 kPa is required to operate at the rated flow of 26 L/min. In an actual installation, pressure losses in the plumbing system also need to be considered. Infinity REU-V2626W / HD200E REU-V2632WC - 7 -...
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-V2626W / HD200E REU-V2632WC - 9 - Issue 1 - 10/10/03 ©Rinnai...
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-V2626W / HD200E REU-V2632WC - 11 - Issue 1 - 10/10/03 ©Rinnai...
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-V2626W / HD200E REU-V2632WC - 12 - Issue 1 - 10/10/03 ©Rinnai...
Page 18: Cutaway Diagram
6. Cutaway Diagram Infinity REU-V2626W / HD200E REU-V2632WC Issue 1 - 10/10/03 ©Rinnai - 13 -...
Page 19: Operational Flow Chart
7. Operational Flow Chart Infinity REU-V2626W / HD200E REU-V2632WC - 14 - Issue 1 - 10/10/03 ©Rinnai...
Page 20: Operation Principles
8. Operation Principles REU-V2626W REU-V2632WC Infinity REU-V2626W / HD200E REU-V2632WC - 15 - Issue 1 - 10/10/03 ©Rinnai...
Page 21: Shut Down
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-V2626W / HD200E REU-V2632WC - 16 - Issue 1 - 10/10/03 ©Rinnai...
Page 22: 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 two ignition electrodes. Infinity REU-V2626W / HD200E REU-V2632WC - 17 - Issue 1 - 10/10/03 ©Rinnai...
Page 23: Time Charts
10. Time Charts Normal Combustion - V2626W Mis-Ignition / Flame Failure - V2626W Abnormal Pre-Purge (Air Supply/Exhaust Blockage) - V2626W Infinity REU-V2626W / HD200E REU-V2632WC - 18 - Issue 1 - 10/10/03 ©Rinnai...
Page 24 Normal Combustion - V2632WC Mis-Ignition / Flame Failure - V2632WC Abnormal Pre-Purge (Air Supply / Exhaust Blockage) - V2632WC Infinity REU-V2626W / HD200E REU-V2632WC - 19 - Issue 1 - 10/10/03 ©Rinnai...
Page 25: Wiring Diagram
11. Wiring Diagram REU-V2626W Infinity REU-V2626W / HD200E REU-V2632WC - 20 - Issue 1 - 10/10/03 ©Rinnai...
Page 27: Dip Switch Settings
Not in use Switches not in use should be in the 'off' position Combustion Computer Programming Always in the 'off' position Normal Combustion Forced Low Combustion Forced High Combustion Infinity REU-V2626W / HD200E REU-V2632WC - 22 - Issue 1 - 10/10/03 ©Rinnai...
Page 28 Legend (Black section indicates position of switch) *Note: ONLY models REU V2632WC and REU V2632FFUC can be converted to 85°C. Unit must be specially converted by Rinnai personell to delivery water at 85 C. Infinity REU-V2626W / HD200E REU-V2632WC - 23 -...
Page 29: Fault Finding
(page 27) readout of electrical values whilst unit operational. (page 34) Dismantling for Service Detailed information on how to remove and replace components. (page 42) Infinity REU-V2626W / HD200E REU-V2632WC - 24 - Issue 1 - 10/10/03 ©Rinnai...
Page 30 3. Check gas valves 4. Check water flow servo. 5. Check bypass servo. (REU-V2632WC only) Anti-frost heater does not operate. 1. Check anti-frost heater components 2. Check frost sensing switch Infinity REU-V2626W / HD200E REU-V2632WC - 25 - Issue 1 - 10/10/03 ©Rinnai...
Page 31: Component Circuit Value Table
Solenoid Valve 2 B-Bk 1.7~2.1k DC80~100V Solenoid Valve 3 Br-Bk On Manifold 1.7~2.0k B-Br 16~18W Transformer W-Bk AC90~110V Valve Heater 50~56k Valve Heater 444~510k and Square Heater Infinity REU-V2626W / HD200E REU-V2632WC - 26 - Issue 1 - 10/10/03 ©Rinnai...
Page 32: Component And Circuit Checks
Disconnect connector (J ) 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-V2626W / HD200E REU-V2632WC - 27 - Issue 1 - 10/10/03 ©Rinnai...
Page 33 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 REU-V2626W / HD200E REU-V2632WC - 28 - Issue 1 - 10/10/03 ©Rinnai...
Page 34 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 REU-V2626W / HD200E REU-V2632WC - 29 - Issue 1 - 10/10/03 ©Rinnai...
Page 35 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 REU-V2626W / HD200E REU-V2632WC - 30 - Issue 1 - 10/10/03 ©Rinnai...
Page 36 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 REU-V2626W / HD200E REU-V2632WC - 31 - Issue 1 - 10/10/03 ©Rinnai...
Page 37 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 REU-V2626W / HD200E REU-V2632WC - 32 - Issue 1 - 10/10/03 ©Rinnai...
Page 38: 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 REU-V2626W / HD200E REU-V2632WC - 33 - Issue 1 - 10/10/03 ©Rinnai...
Page 39: Maintenance Monitor / Error History
0 or 1 *Note 2 Remote control connection none *Note 2 Remote Control Connections Bathroom Remote Controls connected Display Additional remotes Kitchen remote “0” “ 0 1 ” “1” Infinity REU-V2626W / HD200E REU-V2632WC - 34 - Issue 1 - 10/10/03 ©Rinnai...
Page 40 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-V2626W / HD200E REU-V2632WC - 35 - Issue 1 - 10/10/03 ©Rinnai...
Page 41: Gas Pressure Setting Procedure
13) Check the burner test point pressure. 14) Adjust the high pressure Potentiometer (POT) on the Printed Circuit Board (PCB) as required to the pressure shown Table 2. (fig. 1). Infinity REU-V2626W / HD200E REU-V2632WC - 36 - Issue 1 - 10/10/03 ©Rinnai...
Page 42 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-V2626W / HD200E REU-V2632WC - 37 - Issue 1 - 10/10/03 ©Rinnai...
Page 43: Gas Conversion Procedure
④ Replace Manifold fit Gasket to Gas Control. REU-V2626W For NG: U245-200-B 92092550 For Propane: U245-200-A 92092089 REU-V2632WC For NG: U245-200-C 92094317 For Propane: U245-200-A 92094309 Infinity REU-V2626W / HD200E REU-V2632WC - 38 - Issue 1 - 10/10/03 ©Rinnai...
Page 45 ⑥ Change Dipswitch No. 7 for low combustion ⑦ Turn ON outgoing water tap ⑧ Set pressure low with solenoid valve adjustment Low Capacity (ｋＰａ） N.G. 0.14 Prop.G 0.22 Infinity REU-V2626W / HD200E REU-V2632WC - 40 - Issue 1 - 10/10/03 ©Rinnai...
Page 46 Fit pressure test point sealing screw ⑮ Check leakage from gas control, manifold connection and pressure point sealing screw ⑯ Refit front cover ⑰ Turn ON 240V power supply Infinity REU-V2626W / HD200E REU-V2632WC - 41 - Issue 1 - 10/10/03 ©Rinnai...
Page 47: Dismantling For Service
18. “Removal of Thermal Fuse” ..........50 Unless otherwise stated, re-assembly is the reverse of dismantling. Infinity REU-V2626W / HD200E REU-V2632WC - 42 -...
Page 48: Removal Of The Front Panel
O-rings are not lost or damaged. 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-V2626W / HD200E REU-V2632WC - 43 - Issue 1 - 10/10/03 ©Rinnai...
Page 49: 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. Infinity REU-V2626W / HD200E REU-V2632WC - 44 - Issue 1 - 10/10/03 ©Rinnai...
Page 50: Removal Of The Gas Control
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 Infinity REU-V2626W / HD200E REU-V2632WC - 45 - Issue 1 - 10/10/03 ©Rinnai...
Page 51: 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 Infinity REU-V2626W / HD200E REU-V2632WC - 46 - Issue 1 - 10/10/03 ©Rinnai...
Page 52: Removal Of Bypass Servo
Remove Anti Frost switch Removal of inlet water connection c. Anti Frost switch g. Remove bypass servo and water flow servo h. Remove fitting screws of bypass servo Infinity REU-V2626W / HD200E REU-V2632WC - 47 - Issue 1 - 10/10/03 ©Rinnai...
Page 53: Removal Of Anti Frost Heater
Remove 4 pin connector b. 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-V2626W / HD200E REU-V2632WC - 48 - Issue 1 - 10/10/03 ©Rinnai...
Page 54: 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-V2626W / HD200E REU-V2632WC - 49 - Issue 1 - 10/10/03 ©Rinnai...
Page 55: Removal Of Thermal Fuse
Remove heat exchanger. b. 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-V2626W / HD200E REU-V2632WC - 50 - Issue 1 - 10/10/03 ©Rinnai...
Page 56: Exploded Diagram
20. Exploded Diagram Infinity REU-V2626W / HD200E REU-V2632WC - 51 - Issue 1 - 10/10/03 ©Rinnai...
Page 60: Parts List
21. Parts List “REU-V2626W” on page 56 “REU-V2632WC” on page 59 Infinity REU-V2626W / HD200E REU-V2632WC - 55 - Issue 1 - 5/12/03 ©Rinnai...

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Rinnai INFINITY REU-V2626W Service Manual

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