Noritz NR501-OD Service Manual
Also see for NRC661-DV: Owner's guideInstallation manualInstructional manualInstallation manualOwner's guide
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Contents
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Circuit Board CheckpointsDisplay Window CN142 R - BL CN1426R - BL/WW - BKBK - BKR - BLGY- BLBK - BLW - BLBK - BL/WY - BLR - BLBR - BLBL -Burnercase14CN10 4-17155CN63Thermistor - AirCN102 2CN92 3Gas Proportioning ValveGas Solenoid Valve - 1121083Primary GasSolenoid ValveIgniter87CN10CN4210Fan MotorFlame RodCN27 4CN78CN10 3 50 - 80 Ω20 - 35 Ω35 - 65 ΩDC 0.7 - 4.4 VCN63CN92 4DC 14 - 16 VAC 108 - 132 VNote 5)100 Hz - 400 HzCN10CN10211DC 0.3 - 15 VDC 1 - 16 VCN27 2FlameRodGNDDC 10 - 14 VDC 7 - 45 VDC 0.45μA or less10 kHz - 100 kHzWhen igniter is sparkingW - BKBL - WThermistor-Hot WaterThermistor-Cold WaterOverheat PreventionDevice (Thermal Fuse)54Ref.No.1PartCN63 4CN & PinCN10 15CN63 2CN10 13DC 1 - 4.5 VNormal value2Ω or less32 - 212° F0 -100° C Note 4)When valve is open7Power Supply(Power Circuit Board)CN1022 Water Servo-Main CN59DC 1 - 16 V34Water Flow Sensor DC 0.5 - 15 Vover 408 pulses/min.(over 6.8Hz)13CN10High Limit Switch 1Ω or less5CN10 Contact resistanceWhen no flame is detectedThermistor-Heat Exchanger11 4 pulse/revolutionDC 1μA or moreCoil resistanceW - WNo. No.No. CN & PinR - BL45612DC 1 - 16 VDC 1 - 16 VDC 1 - 16 VCN59W - OW - GW - VW - BK10 12 DC 14V - 16 VR - BL3 CN639 12Y - BL Y(+) BL(-)CN63 1 CN63 2 DC 1 - 4.5 V 32 - 212° F0 -100° C Note 4)CN63 3 CN63 2 DC 1 - 4.5 V 32 - 212° F0 -100° C Note 4)BL -Electrode-111CN27 CN27 226 3CN10 CN10 11 When valve is openCoil resistanceCN10 11 When valve is openCoil resistanceGas Solenoid Valve - 2 CN10Coil resistanceFlame Rod CN7810 kHz - 100 kHz-19O - BL16 Gas Solenoid Valve - 3 6CN10 CN10 11 When valve is openCoil resistance3Power Supply(Power Circuit Board)-- 2 DC 14 - 16 V1Note 4) •Cold Water / Hot water / Heat Exchanger Thermistor Temperature CharacteristicsTemperature (° F)Resistance (k Ω) 7.010.315.523.7320 2068501086301.41.92.53.54.95012210440140601587017680Note 6) Between CN142 No.4 of both Main circuit boardand Display window circuit boardTemperature (° C)Note 5) •Thermistor - Air Temperature CharacteristicsTemperature (° F)Resistance (k Ω)Temperature (° C)59.6-4106.5-2014 32 5034.4-10 020.61068 86308.012.620CN63Circuit board Check points(Check the wiring diagrambehind the front cover)1111W - BKW - BKRemote Controller CN89A Terminal-Terminal CN89B- - DC 14 - 16 V2 When valve is fully openY - BL 12 DC 1V or lessCN63CN104 DC 14V - 16 VDC 14 - 16 VBL -BurnercaseFlameRodGNDBL -ElectrodeDC 1 - 16 VDC 1 - 16 VDC 1 - 16 V35 - 65 Ω35 - 65 ΩBL - BL 4 1Ω or lessNote 6) Note 6)29 |
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