Rinnai REU-2007W Service Manual Download Page 1

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Summary of Contents for REU-2007W

Page 2: ...rformance and quality levels are achieved Proudly a member of The Australian Gas Association All of our products are AGA tested and approved Distributed and serviced in Australia under a Quality Syste...

Page 3: ...within cannot be exchanged or diagnosed faulty Please follow instructions in chapters to ensure safe and appropriate service After completing the service and confirming that there are no water or gas...

Page 4: ...n 12 11 Dip Switch Positions 13 12 Water Flows 17 13 Gas Consumption 21 14 Main Components 23 15 Time Charts 26 16 Operation Flow Principle 29 17 Operation Principles 31 18 Error Messages 33 19 Diagno...

Page 5: ...circuit kcal h kilocalorie per hour kPa kilopascals LED light emitting diode L min Litres per minute mA milliamps MJ h megajoule per hour mm millimetres mmH2O millimetres of water guage pressure NOX...

Page 6: ...around the front cover and flue outlet prevent water from entering the appliance Air inlets are situated in the front panel The general layout of components is shown on the cutaway diagram on page 9...

Page 7: ...U 2008 models will supply up to 21 L min and REU 2424 model will supply up to 24L min maximum unmixed controlled by an automatic electro mechanical water flow device The REU 2007 model will supply up...

Page 8: ...Infinity REU 2007 2008 2408 2424 3 Rinnai 1 2 Note All dimensions are in mm...

Page 9: ...Infinity REU 2007 2008 2408 2424 4 Rinnai Note All dimensions are in mm Pipework will vary in each installation...

Page 10: ...isplay Water temperature adjustment only in the range of 37 C to 43 C whilst hot water is flowing Different temperatures can be stored in the memory of each individual remote control Kitchen Remote Co...

Page 11: ...Infinity REU 2007 2008 2408 2424 44 There must be at least on cable from any remote control connecting with the Infinity water heater Connections The following diagrams show methods of connection...

Page 12: ...he built up pressure if the pressure inside the heat exchanger reaches 2100 kPa until 1500 kPa is maintained 0 The combustion fan rpm are continually monitored by a magnetic pulse counter connected to...

Page 13: ...18 kilograms Efficiency rating 80 Noise level 49 dB A Connections Gas supply R 20A Cold water inlet R 20A Hot water outlet R 20A Ignition system Direct electronic ignition Minimum gas rate 21 MJ h El...

Page 14: ...2 4 9 9...

Page 15: ......

Page 16: ...Infinity REU 2007 2008 2408 2424 11 Rinnai 2 4...

Page 17: ...NG NIL NIL NIL Propane LPG A A A Pressure NG HI kPa 0 65 0 90 0 90 LO 0 08 0 08 0 08 Propane LPG HI kPA 1 60 1 51 2 26 1 90 2 26 1 90 LO 0 17 0 15 0 17 0 15 0 17 0 15 Burner type NG Propane NG Propane...

Page 18: ...elect maximum temperature with remote connected 4 to 8 for modified PCB see settings To select the temperature with or without remote connected Note PCB were modified in April May 1999 to accommodate...

Page 19: ...tches 6 7 8 are set to any of the positions shown above and the remotes become disconnected the outgoing water temperature will automatically default to the temperature set on switches 3 4 5 as shown...

Page 20: ...9 05 000061 99 05 000221 3 4 REU 2424W A NC REU 2424W AK NC 01 05 99 01 05 99 10 05 99 01 05 99 LP NG LP NG 99 05 000362 99 05 002931 99 05 000141 99 05 000421 5 6 REU 2008W A NC REU 2008W AK NC 01 05...

Page 21: ...ensation above the burner may occur at temperatures of 55 C or lower when the bypass is restricted 85 C outgoing hot water can be achieved by placing dip switches No 5 No 6 and No 7 to the ON position...

Page 22: ...ated where the line intersects the bottom of the chart How to calculate water flows The following information is an outline of the formula required to measure accurately the flow rate in litres per mi...

Page 23: ...emperature of 50 C and an incoming water temperature of 15 C be 11 5 litres per minute The chart opposite indicates that the water flow rate of the REU 2007 will at a preset temperature of 50 C and an...

Page 24: ...erature of 5 C IS 13 litres per minute The chart opposite indicates that the water flow rate of the REU 2008 2408 will at a preset temperature of 50 C and an incoming water temperature of 15 C is 17 l...

Page 25: ...of 50 C and an incoming water temperature of 15 C be 18 litres per minute The chart opposite indicates that the water flow rate of the REU 2424 will at a preset temperature of 50 C and an incoming wat...

Page 26: ...e chart on the following page is an approximate guide to the gas input according to the various temperature rises and water flows To calculate the approximate gas input first select the appropriate cu...

Page 27: ...is chart is an approximate guide to the gas input according to various temperature rises and water flows See previous page last paragraph for the explanation on how to calculate approximate gas consum...

Page 28: ...en the incoming water is 25 C and the lower line when it is 5 C The following graphs show that the maximum flow is approximately 20 L min for the 2008 2408 24 L min for the 2424 or 13 5 L min for the...

Page 29: ...ays matches the volume of air for combustion as well as the input required to heat the water The reason for controlling the opening degree of the modulating gas valve based upon data from the combusti...

Page 30: ...tinguish the flame A position memory alloy spring in the mechanical water flow control device made from a metal known as NiTi Alloy alters its spring tension according to the incoming water temperatur...

Page 31: ...Infinity REU 2007 2008 2408 2424 26 Rinnai 3 A A 6 4 8...

Page 32: ...Infinity REU 2007 2008 2408 2424 27 Rinnai 4 2 A Normal Combustion Sequence...

Page 33: ...Infinity REU 2007 2008 2408 2424 28 Rinnai Error Sequence Ignition Flame Failure Pre Purge Defect Sequence...

Page 34: ...osed Sparker OFF Pre purge 2 sec Water flow ON 2 7 L min or more Combustion fan operates Pre purge 14 Flashing 32 Flashing 71 Flashing 72 Flashing 61 Flashing 61 Flashing Modulating valve Closed Chang...

Page 35: ...mal 14 Flashing 16 Flashing 12 Flashing 52 Flashing 10 Flashing Combustion indicator OFF Yes Yes Yes No No No 1 1 2408 2008 series operation only Change over sld SV3 Open 13 Modulating valve control C...

Page 36: ...voltage to the fan motor This maintains the correct air gas ratio throughout the time the water heater is in use to ensure good combustion The gas is ignited by direct electronic spark and the flame...

Page 37: ...stant temperature adjusting both the gas input and water flow in the case of the 2008 and 2408 where necessary It also continually monitors the combustion fan rpm adjusting the gas rate to match When...

Page 38: ...ate X X X X X 32 Short or faulty wiring in water temperature thermistor Does not operate X X X X X Water flow control device faulty Water flow is not controlled water temperature incorrect 61 Combusti...

Page 39: ...me rod 6 C1 white white Thermistor resistance value Temp resistance 15 C 11 4 14 k 30 C 6 4 7 8 k Thermistor 7 B2 red red Below 1 Thermal Fuse 8 B3 red red Below 1 Over Heat Switch 9 I1 grey grey AC 9...

Page 40: ...Infinity REU 2007 2008 2408 2424 35 Rinnai 4 2 4 COLOUR CODING W White Bk Black Br Brown R Red B Blue Y Yellow P Pink Or Orange Gr Green Gy Grey...

Page 41: ...electric fuse 3A Normal less than 1 If normal proceed to check item 2 below Faulty Replace fuse 5A If it blows again investigate cause of short circuit 2 Is the main transformer normal Check the trans...

Page 42: ...the two remote control cable conductors a Check the voltage between terminals on the remote control terminal mount H1 Normal DC 10 13V If normal check for open circuit or shorts before replacing the...

Page 43: ...rod Measure resistance between flame rod terminal A2 and the appliance earth Normal 1 M or more If normal replace the PCB unit Faulty Replace the flame rod 3 Is the water temperature thermistor norma...

Page 44: ...C11 13V If normal go b below Faulty Replace the PCB unit c Measure the voltage at connector D1 black white Normal DC2 9V If normal proceed to check item 5 below Faulty Replace the combustion fan 5 Is...

Page 45: ...change over solenoid valve SV2 a Disconnect the main gas solenoid valve SV2 connector and measure the resistance at the solenoid terminals Normal 1 3 1 9 k If normal check b below Faulty Replace the...

Page 46: ...Faulty Replace the remaining flame safety device Combustion stops due to flame failure 1 Is the flame rod functioning normally a Measure the voltage between the flame rod terminal A2 and the appliance...

Page 47: ...eed to check item 2 below Faulty Replace water temperature thermistor 2 Is the changeover solenoid valve SV3 normal a Disconnect the changeover solenoid valve SV3 connector and measure the resistance...

Page 48: ...ng valve 4 Is the water flow servo normal 2008 2408 a Disconnect connector and measure the red blue resistance on the water flow servo side Normal 10 30S If normal go to b Faulty Replace the water flo...

Page 49: ...ater D assy 2007 b Disconnect connector J3 and measure the resistance between blue and blue on the heater exchanger s heater side Normal 135 175 If normal go to item 2 below Faulty Replace anti frost...

Page 50: ...stance of each solenoid valve Remove connector I from the PCB before measuring Pink Black 0 9 1 3 k Yellow Black 1 3 1 9 k Blue Black 1 5 1 9 k Are values within those specified at left N B Measure af...

Page 51: ...tion sensor Measure voltage between black yellow at connector D1 DC11 13V Yes Go to B 4 iv No Replace combustion fan 18 iii Measure voltage between black white of connector D1 DC2 9V Yes Go to B v No...

Page 52: ...earth connections to round terminals for broken wires or short circuits Are connections OK Yes Check other causes for flame failure 34 No Adjust replace earth lead 36 D Can not adjust water temperatu...

Page 53: ...w servo connector I1 don t turn water ON Is voltage DC 0 5V Yes Normal No Replace water flow servo with sensor 45 E Anti frost heater does not work 1 Check anti frost heater i Disconnect connector J3...

Page 54: ...de front cover 8 Remove PCB protective plastic cover 9 Disconnect flame sensor and sparker lead 10 Remove combustion chamber cover 11 screws 11 Remove manifold 5 screws 12 Fit or remove damper assembl...

Page 55: ...Natural 0 8 kPa Propane 0 17 kPa LPG NZ 0 15 kPa c Lock regulator screw modulating valve 2 High a Position No 3 of the bottom set of dip switches to the ON position leaving No 2 ON b 2007 2008 using t...

Page 56: ...water from the appliance Item Page 1 Removal of Front Panel 52 2 Removal of PCB 52 3 Removal of Water Flow Sensor with Water Flow Servo 52 4 Removal of Sparker 53 5 Removal of Combustion Fan 53 6 Rem...

Page 57: ...eter a Remove the four 4 screws holding the panel in place phillips driver 2 Removal of PCB CAUTION 240 volt potential exposure Isolate the appliance and reconfirm with a neon screwdriver or multimete...

Page 58: ...nsion lead connector 5 Removal of Combustion Fan CAUTION 240 volt potential exposure Isolate the appliance and reconfirm with a neon screwdriver or multimeter a Detach the sparker refer to section 4 b...

Page 59: ...section 4 c Remove one solenoid valve connector d REmove two 2 fixing screws to release the transformer phillips driver e Disconnect connectors 8 Removal of Manifold and Burner CAUTION 240 volt potent...

Page 60: ...the gas connection Handle O ring carefully phillips driver 10 Removal of Heat Exchanger CAUTION 240 volt potential exposure Isolate the appliance and reconfirm with a neon screwdriver or multimeter a...

Page 61: ...trical connectors including the thermistor g Pull out the heat exchanger unit towards yourself 11 Removal of Thermal Fuse CAUTION 240 volt potential exposure Isolate the appliance and reconfirm with a...

Page 62: ...Infinity REU 2007 2008 2408 2424 57 Rinnai 5 2 4...

Page 63: ...Infinity REU 2007 2008 2408 2424 58 Rinnai...

Page 64: ...Infinity REU 2007 2008 2408 2424 59 Rinnai...

Page 65: ...Infinity REU 2007 2008 2408 2424 60 Rinnai...

Page 66: ...81587 3074 1 101 Test Point Screw 2 103 Gas Control Assembly 92081595 3083 1 104 Manifold Assembly NG 3125 1 104 Manifold Assembly LPG 92081603 3089 1 105 Damper LPG Propane Gas 92071364 3136 1 Damper...

Page 67: ...3349 1 404 Auto Water Flow Control Sensor 2007 92081736 1 405 Water Valve Heater 92082437 1 408 R3 4 20 Hot Water Outlet Connection 92081744 3373 1 409 Pressure Relief Valve Band 1 410 Pressure Relief...

Page 68: ...2081884 2362 1 721 240 V Anti frost Heater A Assy AK only 92081892 3390 1 722 Heater Bracket AK Only 1 723 3 Amp Fuse Harness 92081900 3391 1 724 Transformer Assy 240 100 Volt 92081918 3392 1 725 Tran...

Page 69: ...AUSTRALIA PTY LTD ACN 005 138 769 ABN 74 005 138 769 0 0 0 10 11 Walker Street Braeside VIC 3195 0 0 0 1 2 3 4 5 634 0 0 0 5 37 0 8 3 8 47 0 8 9 9 0 0 NEW ZEALAND LTD 2 2 0 7 5 7 5 8...

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