
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Key Components: NP
14
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
Flow Sensor
AASS9EXFS003C
19
Secondary H/E
-
4
Power Switch
BH1426003A
20
Primary H/E
-
5
PCB Board
NACR1GS32401
21
Ignition Trans
BH1201045A
6
Heater
BH1501047B
22
APS Venturi
BH2501413A
7
Heater Clip
BH2507447A
23
Manifold
PABCR180AMF_001
8
DHW Supply Adapter
BH2507348B
24
Burner
PABNCN30KDBN_003
9
DHW Inlet Adapter
AAVC9EX00016B
25
APS
NASS9EX00009
10
Syphon
BH2507452C
26
Exhaust Duct
BH2544004F
11
Gas Inlet Adapter
BH2507722A
27
Exhaust Pipe
BH2505401B
12
Main Gas valve
BH0901018A
28
Air Intake Guide
BH2543002C
13
GPS Venturi
BH2507359C
29
WAV
NCVM9EX00005B
14
Gas Pipe
BH2507351C
30
Freeze Protect Switch
BH1402001A
15
GPS
NASS9EXGPS01
31
Bypass Mixing Valve
AAVC9EXMIX01B
16
2-Way Valve
AAVC9EX00014A
32
Mixing Trans
BH1205013A
Summary of Contents for NR-180A
Page 5: ...SAFETY Safety Instructions 5 this...
Page 7: ......
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Page 20: ...INSTALLATION Locating the Water Heater 20 or follow local codes...
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Page 24: ...INSTALLATION Pressure Relief Valve 24 Pressure Relief Valve Shut off Valve...
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Page 31: ......
Page 32: ...INSTALLATION Venting 32 ground or local codes...
Page 33: ...INSTALLATION 33 Venting...
Page 34: ......
Page 35: ...INSTALLATION 35 Venting Clearances 1 Natural Natural...
Page 37: ...INSTALLATION 37 Venting Indoor Installation...
Page 39: ...INSTALLATION 39 Venting CONCENTRIC VENT TERMINATION 1 Sidewall Installation 2 Roof Installtion...
Page 40: ...INSTALLATION Venting 40...
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Page 43: ......
Page 44: ...INSTALLATION PCB Board Settings 44...
Page 45: ...INSTALLATION 45 CascadeConnectionandSet upProcedures...
Page 46: ...INSTALLATION 46...
Page 47: ...INSTALLATION 47...
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Page 55: ...INSTALLATION 55...
Page 56: ...INSTALLATION 56...
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Page 68: ...OPERATION Navien America Inc Limited Warranty 68 12 Grains of hardness may...
Page 69: ...OPERATION 69 Model Description Legend...
Page 70: ...OPERATION General Parts 70 Condensate Water...
Page 71: ...OPERATION 71 General Parts Condensate Water...
Page 72: ...OPERATION Remote Controller 72 Hot Water In Use Indicator...
Page 74: ...OPERATION OPERATION Setting the Clock 74 Hour Minute...
Page 79: ...OPERATION 79 A Series Recirculation Timer Setting 74...
Page 81: ...OPERATION 81 Lock Function Setting...
Page 82: ...OPERATION Well Pump setting function 82...
Page 85: ......
Page 89: ...OPERATION 89 A Series External Recirculation Mode...