Table Of Contents - Navien NHB-055 Installation & Operation Manual

Contents
1. About the Boiler
1.1 Included Items
1.2 Accessories
1.3 Specifications
1.4 Components
1.5 Dimensions
1.6 Rating Plate
2. Installing the Boiler
2.1 Choosing an Installation Location
2.2 Mounting the Boiler to the Wall
3. Installing the System Piping
3.1 Installing a Space Heating System
3.2 Connecting the Condensate Drain
3.3 Filling the System
3.4 Testing the Water System
3.5 Examples of System Applications
3.6 Examples of Electrical Connections
4. Connecting the Gas Supply
4.1 Gas Pipe Sizing Tables
4.2 Measuring the Inlet Gas Pressure
5. Venting the Boiler
5.1 Selecting a Vent Type
5.2 Selecting Vent Pipe Materials
5.3 Measuring Vent Length
5.4 Terminating the Vent
6. Setting the DIP Switches
6.1 PCB DIP Switches
6.2 Front Panel Dip Switches
6 7. Connecting the Power Supply
6
8. Installing a Cascade System
6
7
8.1 Connecting Water Supplies
9
8.2 Connecting the Communication Cables
11
12
9. Installing a Common Vent System
9.1 About the Common Vent System
13
9.2 Navien Backflow Damper (Back-draft Damper)
13
9.3 Starting the Common Vent System
15
9.4 Connecting and Terminating the Vent Pipe
9.5 Setting Up the Common Vent System
16
9.6 Common Vent Termination Clearances
16 9.7 Exhaust Vent Termination Clearances (For Direct Vent)
22 9.8 Maintenance
24
10. Installation Checklist
24
25
31
11. Operating the Boiler
11.1 Turning the Boiler On or Off
36
11.2 Adjusting the Temperature
38
11.3 Viewing Basic Information
39
11.4 Viewing Service Information
11.5 Setting the Operation Mode
41
11.6 Setting the Parameters
41 11.7 Resetting the Boiler
45
12. Appendixes
45
46
12.1 Gas Conversion
12.2 Wiring Diagram
48
12.3 Ladder Diagram
48 12.4 Component Assembly Diagrams and Parts Lists
49 12.5 Outdoor Temperature Sensor
12.6 Outdoor Reset Control
50
51
51
55
57
57
62
63
65
66
66
68
69
70
73
73
73
74
75
77
78
85
86
86
91
92
93
99
100
Contents 3