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Navien NP-180 Service Manual

Also see for NP-180: Quick installation guideInstallation manualOperation & installation manualInstallation manual

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Contents
  1. Table Of Contents
  2. Table Of Contents
  3. Table Of Contents
  4. Table Of Contents
  5. REVISIONS
  6. NAVIEN WARRANTY
  7. HANDLING OF THIS MANUAL
  8. ABBREVIATION AND DEFINITION
  9. SAFETY CONSIDERATIONS
  10. SAFETY PRECAUTIONS
  11. PRODUCT INFORMATION
  12. LAYOUT AND KEY COMPONENTS
  13. NP-A Model
  14. NR Model
  15. NP Model
  16. TECHNICAL DATA
  17. DIMENSIONS
  18. NR, NP Model
  19. SYSTEM DETAILS
  22. OPERATION FLOW CHART
  23. DIP SWITCH SETTINGS
  24. WIRING DIAGRAM
  28. ELECTRICAL DIAGNOSTIC POINTS
  29. KEY COMPONENTS DESCRIPTION
  30. Thermal Fuse
  31. Transformer
  32. Thermistor
  33. Fan motor
  34. Flame Rod Ass'y
  35. Ignition Transformer
  36. Manifold
  37. Main Gas Valve
  38. Burner
  39. Water Adjustment Valve
  40. Flow Sensor
  41. Primary Heat Exchanger
  42. secondary heat exchanger
  43. circulation pump ("a" series)
  44. bypass mixing valve ("non-a" series)
  45. TROUBLESHOOTING
  46. ERROR
  70. TROUBLESHOOTING GUIDE BY SYMPTOM
  71. Hot water
  72. Circuit breaker operates
  73. INSPECTION
  74. MEASURING GAS PRESSURE SETTING
  75. Adjusting the Gas-Air Ratio
  76. MAINTENANCE
  77. CLEANING THE INTAKE AIR FILTER
  78. FLUSHING THE HEAT EXCHANGER
  79. REPLACEMENT OF PARTS
  80. COMPONENTS REPLACEMENT INSTRUCTIONS
  81. Fuse
  83. Flame Rod
  87. Condensation Trap
  90. way valve ("a" series)
  91. way valve ("np-a" "np" series)
  92. COMPONENTS DIAGRAM AND PART LIST
  93. burner disassemble (nr/np – a, nr/np)
  94. WATER WAY DISASSEMBLE (NR-A)
  95. WATER WAY DISASSEMBLE (NR)
  96. WATER WAY DISASSEMBLE (NP-A)
  97. WATER WAY DISASSEMBLE (NP)
  98. INSPECTION AND MAINTENANCE SCHEDULE
  99. INSPECTION REPORT
Navien NP-180 Service Manual Manual pdf 31 page image
©Navien America Inc. 2010 NR/NP series service Manual29Version 2.04.2. Operation Flow ChartPower ONFaucet Open Faucet CloseMGV OFFMV OFFPost-Purge: 10 secDHW Waiting:Fan Motor ON for 300 secSGV1 OFFSGV2 OFFMGV OFF?Igniter OFF?SGV1 OFF?SGV2 OFF?Stand-byMGV OFFSGV1 OFFSGV2 OFFWatch-dog OFFIgniter OFFGV/Igniter PowerOFFFlame ON?Flow Sensor>= 0.53 GPMLock-out:004ELock-out:015ELock-out:027ELock-out:009ELock-out:010EFlame On:Pre-PurgeNo Air Check:APS normal?Watch-dog ONBurner Start-upGV/Igniter PowerONIgniter ONIgniter ONfor 1 sec?Igniter OFFFM ControlAPSnormal?Fan Motor ON/AP CheckFM start-up:FM and AP normal?Flow Sensor>= 0.53 GPMFlow Sensor>= 0.53 GPMYESNOBDCCYESYESYESYESNOYESYESYESYESSystem lnitalizationBNOYESYESNONONONONOYES NONONONONOYES
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This manual is suitable for:
NP-180NP-180ANP-210NP-210ANP-240NP-240ANR-180NR-180ANR-210NR-210ANR-240NR-240A
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