Rinnai B20 Service Manual

Continuum and IntegrityREU2532-W and REU2532-WCSeries Water HeatersSERVICE MANUALRinnai Corporation103 International DrivePeachtree City, Ga. 30269Tel

REU-2532W Series 10 Rinnai5. Remote ControlsThe MC45-4US, BC45-4US, BSC45-4US , and the MCC45-4US remote key pads were specifically designedfor use wi

REU-2532W Series 11 Rinnai6. Suggested Connection Methods for RemotesThere must be at least one cable from the remote control(s) connected to the Cont

REU-2532W Series 12 Rinnai7. Safety DevicesFlame FailureSituated to the right of the burner in the front of the combustion chamber, the flame rod moni

REU-2532W Series 13 Rinnai5 °F Over temperature Cut-OffThe temperature of the outgoing hot water is constantly monitored by the water temperature ther

REU-2532W Series 14 Rinnai8. SPECIFICATIONS Type of appliance Temperature controlled continuous flow gas hot water system Operation With/without re

REU-2532W Series 15 RinnaiSpecifications cont.Power Supply Appliance – 120 Volts A.C. – 60 Hz. Remote control 12 volt D.C. (Digital) Flame failure B

REU-2532W Series 16 Rinnai9. Cut-way DiagramREU-2532-FFU Series

REU-2532W Series 17 Rinnai10. Schematic DiagramREU-2532W Series

REU-2532W Series 18 Rinnai11. Combustion Specifications Model: REU-2532W Series Item Gas Type Natural Propane Minimum Btu’s 15,000 15,000 G

REU-2532W Series 19 Rinnai12. DIP SWITCHESContact Rinnai for dip switch settings when changing PC board or setting up unit for special applications. F

REU-2532W Series 2 RinnaiKey to Warning SymbolsFailure to comply with the following instructions may results in serious personal injury ordamage to th

REU-2532W Series 20 Rinnai(Switches 3,4, & 5) Temperature Adjustment Switches. Switches #3, 4, and 5 are used to set fixed temperatures with orw

REU-2532W Series 21 RinnaiThe settings below are factory default settings. Please ensure the model number and gas type of the unityou have, matches th

REU-2532W Series 22 Rinnai13. Water FlowsA simple calculation of the water flow rate, in gallons per minute, can be made using the chart on thenext pa

REU-2532W Series 23 RinnaiUnmixed Water Flows for REU-2532 SeriesThe chart below can be used to determine water flow rates in “gallons per minute” at

REU-2532W Series 24 Rinnai14. Main Components1. Mechanical Water RegulatorRinnai’s unique water regulator mechanism ensures the hot water is maintaine

REU-2532W Series 25 Rinnai5. Combustion FanAir for the combustion is supplied by a centrifugal fandriven by a DC motor. After a pre-purge period of 0.

REU-2532W Series 26 Rinnai15. Time Charts (External Unit)

REU-2532W Series 27 Rinnai

REU-2532W Series 28 Rinnai16. Operation Flow PrincipleCheck power supplyFuses/electrical circuit operationalcombustion fan operatesFan initial power

REU-2532W Series 29 RinnaiB CDFlame detected (1 micro amp or g reater)Sparker OFFIgnition failure (3 attempts)Modulating valve operationalCombustio

REU-2532W Series 3 RinnaiTable of ContentsGlossary of Terms and Symbols ...

REU-2532W Series 30 Rinnai17. Operation PrinciplesThe preset temperature is selected at one of the remotes controls (where fitted). Where no remote co

REU-2532W Series 31 RinnaiWhen the hot water tap is turned off, the water flow sensor stops revolving, and the magnetic pulse ceases,indicating to the

REU-2532W Series 32 Rinnai18. Error Codes Error Faulty Remedy 10 Air Supply or Exhaust Blockage Check intake and exhaust ports for obstructions. Che

REU-2532W Series 33 Rinnai32 Outgoing Water Temperature Sensor Faulty Check sensor wiring for damage. Ohm out sensor Check and clean scale from sensor

REU-2532W Series 34 Rinnai19. Diagnostic PointsFlow Chart is on page #28Wiring Diagram is on page #35ComponentMeasurement PointNormal Value NotesComp.

REU-2532W Series 35 Rinnai20. REU-2532W Series Wiring

REU-2532W Series 36 Rinnai21. Block Diagram

REU-2532W Series 37 Rinnai22. Electrical Component AnalysisBefore carrying out checks marked with a # sign, disconnect power supply.Unit’s wiring diag

REU-2532W Series 38 Rinnai 3) Is the remote control normal ? Check voltage between the two remote control cable connectors. a. Check the voltage

REU-2532W Series 39 Rinnai 2) Is the flame rod normal ? Error “72” is displayed Checking the flame rod. a. # Detach the flame rod terminal C1,

REU-2532W Series 4 RinnaiGlossary of Terms and SymbolsThis glossary of terms and symbols is provided to assist you in understanding some of thelanguag

REU-2532W Series 40 Rinnai 4) Is the combustion fan motor normal ? Motor check. If error “61” is displayed, check the combustion fan. a. Meas

REU-2532W Series 41 Rinnai 6) Is the main gas solenoid valve (SV0) operating normally ? If error “11” or “71” is displayed, check the main gas

REU-2532W Series 42 Rinnai 9) Is the change over solenoid (SV3) operating normally? If error “11” or “71” is displayed, check the change over

REU-2532W Series 43 Rinnai Error code “14” Check the thermal fuse. a. # Disconnect connector B3 and C3, measure the resistance between the red

REU-2532W Series 44 Rinnai Unable to adjust hot water temperature 1) Is the water temperature thermistor operating normally ? a. # Disconnect t

REU-2532W Series 45 Rinnai 3) Is the modulating valve operating normally ? Error code 52 a. # Disconnect the modulating valve festoon C2 ter

REU-2532W Series 46 RinnaiAnti-frost heaters do not operate 1) Are the ceramic anti-frost heaters OK ? a. # Disconnect connector F4, and measure

REU-2532W Series 47 Rinnai23. ELECTRICAL COMPONENT ANALYSIS Nature of Fault Examination Point Diagnostic Point Values Y/N Action Repair No Yes

REU-2532W Series 48 Rinnai Nature of Fault Examination Point Diagnostic Point Values Y/N Action Repair No Yes Go to A – (7) 2. Measure th

REU-2532W Series 49 Rinnai Nature of Fault Examination Point Diagnostic Point Values Y/N Action Repair No Yes Go to B-5-2 1. Measure voltage

REU-2532W Series 5 Rinnai1. IntroductionThe brand name Continuum refers to “Endless Hot Water”. The new Continuum series has beendeveloped in response

REU-2532W Series 50 Rinnai Nature of Fault Examination Point Diagnostic Values Y/N Action Repair No. Yes Go to C-1-2 1. Measure the voltage b

REU-2532W Series 51 Rinnai Nature of Fault Examination Point Diagnostic Point Values Y/N Action Repair No Yes Go to 4-3 2. Measure voltage be

REU-2532W Series 52 RinnaiGas Pressure Setting Procedure CONTINUUM and INTEGRITY REU-2532- W All settings/adjustments must be performed by a quali

REU-2532W Series 53 Rinnai8. Turn off the gas to the water heater. Remove the manometer connection. Reinstall the pressure port plug. Turn on the g

REU-2532W Series 54 Rinnai25. Dismantling for Service NOTE: Before proceeding with dismantling, be sure to follow the CAUTION instructions befo

REU-2532W Series 55 Rinnai P.C. board screws Gas shut-off Cold and hot water shut-off valves Front cover screws. Water flow sensor and servo

REU-2532W Series 56 Rinnai Water filter housing. Sparker module. Outlet water thermistor. Remove combustion fan motor housing, (2) screws sc

REU-2532W Series 57 Rinnai Transformer and wiring harnesses. Burner assembly. Remove (2) screws shown by arrows and (8) screws in the view glass

REU-2532W Series 58 Rinnai Gas valve Heat exchanger inlet and outlet water lines Gas connection Remove (2) screws back behind combustion fan

REU-2532W Series 59 Rinnai Thermal fuse assembly, one located on the front of the heat exchanger and one on the rear of this assembly. 7. Removal o

REU-2532W Series 6 Rinnai2. FeaturesInstallationThe lightweight, slim, compact design enables ease of installation and improved appearance. The r

REU-2532W Series 60 Rinnai26. EXPLODED VIEW - CABINET

REU-2532W Series 61 RinnaiEXPLODED VIEW - INTERNALS

REU-2532W Series 62 RinnaiEXPLODED VIEW - INTERNALS

REU-2532W Series 63 RinnaiEXPLODED VIEW - ELECTRICAL

REU-2532W Series 64 RinnaiPARTS LISTNumber Description Part Number Quantity001 Front Panel Assembly U245-1110 1002 Casing Assembly U245-1100 1003 Wall

REU-2532W Series 65 RinnaiPARTS LISTNumber Description Part Number Quantity111 Packing of Combustion Chamber AU155-207-2 1112 Lower Packing of Combust

REU-2532W Series 66 RinnaiPARTS LISTNumber Description Part Number Quantity403 By-pass Servo Assembly M6J-1-3 1404 Stop Bracket AH69-310 2405 Plug Ban

REU-2532W Series 67 RinnaiPARTS LISTNumber Description Part Number Quantity718 Anti-Frost Heater Clip AU100-721 1720 Power Supply Harness AU195-1876 1

REU-2532W Series 68 RinnaiPARTS LISTNumber Description Part Number Quantity814 O-ring M10B-2-16 2815 O-ring M10B-2-14 2816 O-ring M10B-2-7 1817 O-ring

REU-2532W Series 69 Rinnai SERVICEMAN’S TROUBLESHOOTING INFORMATION for the RINNAI “CONTINUUM REU2532-W” WATER HEATERS IMPORTANT SAFETY NOTES: The

REU-2532W Series 7 RinnaiWater Temperature ControlWith an “MC” remote control connected, the hot water control range at the key pad is 96 – 140 °F. Th

REU-2532W Series 70 RinnaiWhite ~ Black 6 ~ 45 VDC 9.2K ~ 9.4K A1 2 ~ 4 Yellow ~ Black 11 ~ 13 VDC 3.5K ~ 3.9K A1 2 ~ 3 Set your meter to the

REU-2532W Series 71 RinnaiUsing a voltage meter set on the 200 ohm scale, you should have a resistance reading of 26 ~ 30 ohms through each of these

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REU-2532W Series 8 Rinnai3. Dimensions

REU-2532W Series 9 Rinnai4. InstallationPiping recommendation.