Navien NP Condensing Tankless Gas Water Heater - Service Manual

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NO Description Navien Part No. Remark 91 100 102 104 107 108 109 110 111 112 113 114 118 Packing ring (3/4") Bolt M4 x 12L (STS) Screw D4 x 6L Bolt D4 x 10L (STS) Bolt M3 x 5L Bolt M4 x 14L (STS) Water pipe adapter (A, Screw) Water pipe adapter (A, Clip) T-type adapter (clip) Freeze protect switch Freeze protect S/W bracket 3-Way valve inlet pipe Motorized 2-way valve BH2422036A BH1612007A BH1705006A BH1611006A BH1603002A BH1612008A BH2507507E BH2507508D BH2507474D BH1402001A BH2505423A BH2507536C BH2507537C AAVC9EX00014A NP “Non-A” Series “Non-A” Series NR-A NP-A NP, NP-A 168 ©Navien America Inc. 2010 NR/NP series service Manual Version 2.0
10. Inspection and maintenance Schedule 10.1. Inspection Report For reasons of safety and economy, it is recommended that the water heater is serviced annually. CAUTION Servicing must be performed by a qualified service agency or gas supplier. Services performed once a year are shown below. Inspection - Visual inspection for general signs of corrosion - Checking and adjusting the gas/air ratio - Checking Flue Gas - Carrying Out a Water Leak Test in Operation - Carrying out a gas leak test in operation - Checking Hot Water Temperature and Flow - Checking Noise - Checking venting systems - Checking the remote controller Maintenance - Draining the water heater and cleaning the inlet water filter - Cleaning the Return Filter - Cleaning the intake air filter - Flushing the heat exchanger - Replacement of parts 169 ©Navien America Inc. 2010 NR/NP series service Manual Version 2.0
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Service Manual Service Manual Servi
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4.4.2. NP-A Model 37 4.4.3. NR Mode
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8.2.8. Manifold 143 8.2.9. Main Gas
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Navien Warranty CAUTION This produc
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WARRANTY EXCLUSIONS This warranty d
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Abbreviation and Definition Abbrevi
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1.4. Safety Precautions DANGER FLAM
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DANGER WHAT TO DO IF YOU SMELL GAS
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GAS TYPE and AC VOLTAGE WARNING Nav
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2.2. Layout and Key Components 2.2.
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2.2.3. NR Model No Description Navi
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3. Technical Data 3.1. General Spec
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3.2.2. NR, NP Model 1) Connection D
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4.1.2. NP-A Model Exhaust pipe inta
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4.1.3. NR Model Exhaust pipe Intake
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YES GPS normal? YES MGV ON NO Lock-
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B Lock-out Outlet Thermistor >= 208
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4.3. Dip Switch Settings There are
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4.4. Wiring Diagram 4.4.1. NR-A Mod
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4.4.3. NR Model ©Navien America In
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4.5. Electrical Diagnostic Points G
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Point Function Wire Color Normal Va
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4.6.2. Thermal Fuse Navien Part No.
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4.6.4. High Limit Switch or Exhaust
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4.6.6. Fan motor Navien Part No. Fu
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4.6.8. Ignition Transformer Navien
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4.6.10. Manifold PABCR180AMF_001 Na
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4.6.12. GPS Navien Part No. Functio
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4.6.14. Water Adjustment Valve Navi
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4.6.16. Primary Heat Exchanger Navi
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4.6.18. Buffer Tank (“A” Series
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4.6.20. Bypass Mixing Valve (“Non
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Error Code E021 Reason Cold water i
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Check method Error type Cause The m
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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
Page 120 and 121: Check method Error type Defective s
Page 122 and 123: Check the connection of wire to wir
Page 124 and 125: 5.26. 48Error Error occurrence cond
Page 126 and 127: 5.27. Troubleshooting guide by symp
Page 128 and 129: 5.27.2. Hot water Error Cause Remot
Page 130 and 131: 6. Inspection Check and clean the h
Page 132 and 133: 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
Page 138 and 139: 8.2. Components Replacement Instruc
Page 140 and 141: 8.2.3. Transformer 1. Turn off the
Page 142 and 143: 8.2.5. Flame Rod 1. Turn off the ga
Page 144 and 145: 8.2.7. APS 1. Turn off the gas supp
Page 146 and 147: WARNING Failure to correctly assemb
Page 148 and 149: WARNING Failure to correctly assemb
Page 150 and 151: 8.2.11. Condensation Trap 1. Turn o
Page 152 and 153: 8.2.13. Flow Sensor 1. Turn off the
Page 154 and 155: 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
Page 160 and 161: NO Description Navien Part No. Rema
Page 164 and 165: 9.3. Water Way Disassemble (NR-A)
Page 166 and 167: 9.5. Water Way Disassemble (NP-A)
Page 172 and 173: 10.2. Inspection Report Inspection
Page 174 and 175: Memo ©Navien America Inc. 2010 172
Page 176 and 177: Memo ©Navien America Inc. 2010 174
Page 178: Memo ©Navien America Inc. 2010 176
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Navien NP Condensing Tankless Gas Water Heater - Service Manual

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