Noritz NR50-OD Service Manual

Also see for NRC111-DV: Installation manual Installation manual Owner's guide Instructional manual Installation manual

Noritz NR50-OD Service Manual Manual pdf 1 page image

1NORITZ America CorporationGas Water HeaterNR50-ODNR66 (-SV,-OD) / N-0531S (-OD)NR71 (-SV,-OD) / N-0631S (-OD)NR98 (-SV,-OD,-DVC) / NC199 (-OD, -DVC) / N-0751M (-OD,-DVC)NCC199 (-SV,-DV) / N-0841MC (-DV)NRC111 (-SV,-DV) / N-0842MC (-DV)NR111 (-SV,-OD,-DV) / NC250 (-SV,-DV)-ASME / N-0931M (-OD,-DV)NC380-SV-ASME / N-1321M-ASMEService Manuals Refer to this manual whenever performing service or maintenanceon this appliance.s This manual will be used for service technician training seminars.s The specifications and descriptions in this manual may be changedwithout prior notice.s For further assistance, contact Noritz Technical Support at 1-866-766-7489.Do not short circuit any safety device onthis applianceRev: July, 2011ContentsWS-06-9019EImportant Safety Information 21. Features 32. Specifications/Performance Tables 53. Dimensions 104. Components 195. Operating Principle 346. Operation Flow Chart 447. Wiring Diagram 498. Troubleshooting 54 Error Codes and Checkpoints 54 Circuit Board Checkpoints 57 Error Descriptions and How to Reset 62 Remote Controller (Optional for NR50-OD/NR66/N-0531S Series, NR71/N-0631S Series) 71 Displaying Maintenance Monitor 72 Maintenance Monitor List 73 Circuit Board Replacement 75 Changing the Fan Motor 79 Neutralizer Life Cycle Warning and Replacement Procedures (condensing models only) 80 Gas Line Requirements 82 Manifold Gas Pressure Adjustment 83 Periodic Inspection 88 Periodic Maintenance 89 Changing Default Temperature Setting 909. Installation Check 94