Navien NR Series Manuals

Navien NR Series Manuals

Manuals and User Guides for Navien NR Series. We have 1 Navien NR Series manual available for free PDF download: Service Manual

Navien NR Series Service Manual

Navien NR Series Service Manual (109 pages)

Tankless Water Heaters

Brand: Navien | Category: Water Heater | Size: 5.08 MB

Table of Contents

Table of Contents
2
Specifications
4
Exterior View
5
Interior View and List of Main Components
7
Schematic and Water Flow Diagram
11
Operation
15
Firing Sequence
15
Shut-Down Sequence
15
Standby Mode
15
Replaceable Major Components
16
Primary Heat Exchanger
18
Secondary (Condensing) Heat Exchanger
19
Fan
20
Pump
21
Gas Valve
22
Water Adjustment Valve
23
Buffer Tank
24
Gas Pressure Sensor (GPS)
25
Air Pressure Sensor (APS)
26
Flow Sensor
27
High Limit Switch or Exhaust Limit Switch
28
Thermostat
29
Ignition Transformer
30
Transformer
31
Thermal Fuse
32
Burner
33
Manifold
34
PCB Board
35
Bypass Mixing Valve
36
Igniter
37
Wiring Diagram
38
PCB Board Check Points for Diagnosis
42
Operational Flow Chart
45
Abbreviation and Definition
45
Error Code and Troubleshooting
50
Power Supply Troubleshooting
52
Boiling Inside Heat Exchanger
54
Ignition Failure
55
False Flame Deflection
57
Outlet Thermostat Open
58
Outlet Thermostat Short
58
Fan Motor RPM Error
59
Air Pressure Sensor Error
60
Flame Loss
61
Cold Water Inlet Thermostat Open/Short
62
Water High Limit/Overheat Cut-Off Fuse Error
63
Exhaust High Limit Error
63
Abnormal Air Pressure Sensor
64
Abnormal Water Adjustment Valve
65
Abnormal Gas Pressure Sensor
66
Leak Detect
67
Abnormal Circulation Pump
67
Abnormal the Water Flow Sensor
68
Abnormal LPG Gas Pressure
68
Communication Error with PCB Board
69
Communication Failure
69
Outlet Thermistor 2 Open/Short
69
Cascade Connection Abnormal
70
Thermostats Connection Abnormal
70
Anbormal Mixing Valve
71
Disassemble, Replace and Repair
72
Fan (Combustion Air Blow)
73
Fuse
74
Igniter Removal
75
Ignition Transformer Removal
76
Air Pressure Sensor (APS) Removal
77
PCB Board Removal
78
Gas Pressure Sensor (GPS) (Disassembly and Assembly)
83
Condensation Trap
84
Buffer Tank (Disassembly and Assembly)
85
Pump (Disassembly and Assembly)
86
Transformer (Disassembly and Assembly)
88
3-Way Valve
89
Water Adjustment Valve (Disassembly and Assembly)
90
Flow Sensor (Disassembly and Assembly)
91
2-Way Valve
92
Bypass Mixing Valve (Disassembly and Assembly)
93
Exploded Views and Parts Lists
94
Measuring Gas Pressure Setting
106
Procedure for Measuring the Inlet Gas Pressure
106
Measuring the Gas-Air Pressure Differential Pressure Setting
107
Standard Setting Chart of the Gas-Air Pressure
108

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