Navien NP Condensing Tankless Gas Water Heater - Service Manual

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2.2. Layout and Key Components 2.2.1. NR-A Model No Description Navien Part No. No Description Navien Part No. 1 Intake Air Duct BH2505400B 16 WAV NCVM9EX00005 2 Fan Motor NAFA9GLPCT01 17 Transformer BH1205008A 3 Buffer Tank PASNCWBFTANK_001 18 Exhaust Limit Switch BH1401027A 4 Flow Sensor BH1406004F 19 Secondary H/E - 5 PCB Board NACR1GS32410 20 Primary H/E - 6 Circulation Pump NAPU9GLPCT01 21 Ignition Transformer BH1201041D 7 DHW Supply Adapter BH2507348B 22 APS Venturi BH2501413A 8 3-Way Valve BH2507467C 23 Manifold PABCR180AMF_001 9 DHW Inlet Adapter BH2507469A 24 Burner PABNCN30KDBN_003 10 Syphon BH2507442C 25 APS NASS9EX00009 11 Gas Inlet Adapter BH2507396A 26 Exhaust Duct BH2544004F 12 Main Gas valve BH0901018A 27 Exhaust Pipe BH2505401B 13 GPS Venturi BH2507359B 28 Air Intake Guide BH2543002C 14 Gas Pipe BH2507509A 29 Power Switch BH1426002A 15 GPS NASS9EXGPS01 30 Water Leakage Detector - ©Navien America Inc. 2010 18 NR/NP series service Manual Version 2.0
2.2.2. NP-A Model No Description Navien Part No. No Description Navien Part No. 1 Intake Air Duct BH2505400B 17 Transformer BH1205008A 2 Fan Motor NAFA9GLPCT01 18 Exhaust Limit Switch BH1401027A 3 Buffer Tank PASNCWBFTANK_001 19 Secondary H/E - 4 Flow Sensor BH1406004F 20 Primary H/E - 5 PCB Board NACR1GS32410 21 Ignition Trans BH1201041D 6 Circulation Pump NAPU9GLPCT01 22 APS Venturi BH2501413A 7 DHW Supply Adapter BH2507348B 23 Manifold PABCR180AMF_001 8 3-Way Valve BH2507467C 24 Burner PABNCN30KDBN_003 9 DHW Inlet Adapter BH2507469A 25 APS NASS9EX00009 10 Syphon BH2507442C 26 Exhaust Duct BH2544004F 11 Gas Inlet Adapter BH2507396A 27 Exhaust Pipe BH2505401B 12 Main Gas valve BH0901018A 28 Air Intake Guide BH2543002C 13 GPS Venturi BH2507359B 29 Power Switch BH1426002A 14 Gas Pipe BH2507351A 30 Water Leakage Detector - 15 GPS NASS9EXGPS01 16 2-Way Valve BH0914002B 31 WAV NCVM9EX00005 ©Navien America Inc. 2010 19 NR/NP series service Manual Version 2.0
Page 1: Service Manual Service Manual Servi
Page 4 and 5: 4.4.2. NP-A Model 37 4.4.3. NR Mode
Page 6 and 7: 8.2.8. Manifold 143 8.2.9. Main Gas
Page 8 and 9: Navien Warranty CAUTION This produc
Page 10 and 11: WARRANTY EXCLUSIONS This warranty d
Page 12 and 13: Abbreviation and Definition Abbrevi
Page 14 and 15: 1.4. Safety Precautions DANGER FLAM
Page 16 and 17: DANGER WHAT TO DO IF YOU SMELL GAS
Page 18 and 19: GAS TYPE and AC VOLTAGE WARNING Nav
Page 22 and 23: 2.2.3. NR Model No Description Navi
Page 24 and 25: 3. Technical Data 3.1. General Spec
Page 26 and 27: 3.2.2. NR, NP Model 1) Connection D
Page 28 and 29: 4.1.2. NP-A Model Exhaust pipe inta
Page 30 and 31: 4.1.3. NR Model Exhaust pipe Intake
Page 32 and 33: YES GPS normal? YES MGV ON NO Lock-
Page 34 and 35: B Lock-out Outlet Thermistor >= 208
Page 36 and 37: 4.3. Dip Switch Settings There are
Page 38 and 39: 4.4. Wiring Diagram 4.4.1. NR-A Mod
Page 40 and 41: 4.4.3. NR Model ©Navien America In
Page 42 and 43: 4.5. Electrical Diagnostic Points G
Page 44 and 45: Point Function Wire Color Normal Va
Page 46 and 47: 4.6.2. Thermal Fuse Navien Part No.
Page 48 and 49: 4.6.4. High Limit Switch or Exhaust
Page 50 and 51: 4.6.6. Fan motor Navien Part No. Fu
Page 52 and 53: 4.6.8. Ignition Transformer Navien
Page 54 and 55: 4.6.10. Manifold PABCR180AMF_001 Na
Page 56 and 57: 4.6.12. GPS Navien Part No. Functio
Page 58 and 59: 4.6.14. Water Adjustment Valve Navi
Page 60 and 61: 4.6.16. Primary Heat Exchanger Navi
Page 62 and 63: 4.6.18. Buffer Tank (“A” Series
Page 64 and 65: 4.6.20. Bypass Mixing Valve (“Non
Page 66 and 67: Error Code E021 Reason Cold water i
Page 68 and 69: Check method Error type Cause The m
Page 70 and 71:
Scenario 1 Is the igniter normally
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Check method Error type Cause Check
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Solenoid valve Proportional valve A
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To the direction of air supply hose
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Check method Error type Flame befor
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Check method Error type Sensor erro
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Check method Error type Sensor erro
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Does the fan moter have normal oper
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5.8. 10Error Error occurrence condi
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Check method Error type Cause Check
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5.9. 12Error Error occurrence condi
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Off at switch of stage Defective ai
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5.11. 16Error Error occurrence cond
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Temperature fuse > < Check if the t
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Emergency measures against closed f
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Check method Error type Defective s
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1. Drain water, and unfasten the up
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Check method Error type Defective s
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Check the connection of wire to wir
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5.27. Troubleshooting guide by symp
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5.27.2. Hot water Error Cause Remot
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6. Inspection Check and clean the h
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6.2.2. Adjusting the Gas-Air Ratio
Page 134 and 135:
7. Maintenance Describe precautions
Page 136 and 137:
7.3. Flushing the Heat Exchanger Fo
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8.2. Components Replacement Instruc
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8.2.3. Transformer 1. Turn off the
Page 142 and 143:
8.2.5. Flame Rod 1. Turn off the ga
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8.2.7. APS 1. Turn off the gas supp
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WARNING Failure to correctly assemb
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WARNING Failure to correctly assemb
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8.2.11. Condensation Trap 1. Turn o
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8.2.13. Flow Sensor 1. Turn off the
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8.2.15. Circulation Pump (“A”Se
Page 156 and 157:
8.2.16. 3-way Valve (“A” Series
Page 158 and 159:
8.2.18. Bypass Mixing Valve (“Non
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NO Description Navien Part No. Rema
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9.3. Water Way Disassemble (NR-A)
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9.5. Water Way Disassemble (NP-A)
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10.2. Inspection Report Inspection
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Memo ©Navien America Inc. 2010 172
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Page 178:
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Navien NP Condensing Tankless Gas Water Heater - Service Manual

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