2 Contents
1. Safety Information
3
2. About the Water Heater
5
2.1 Items Included 5
2.2 Accessories
5
2.3 Specifications
6
2.4 The Front Panel
7
2.5 Components
8
2.6 Dimensions
11
2.7 Rating Plate
13
3. Installing the Water Heater
14
3.1 Choosing an Installation Location 14
3.2 Mounting the Water Heater to the Wall
15
3.3 Connecting the Gas Supply
16
3.4 Connecting the Water Supply
20
3.5 Connecting the Condensate Drain
26
3.6 Venting the Water Heater
28
3.7 Connecting the Power Supply
35
3.8 Setting the DIP Switches
35
4. Installing a Cascading System
37
4.1 Connecting Water Supplies 37
4.2 Connecting the Communication Cables
38
5. Appendixes
40
5.1 Gas Conversion 40
5.2 Technical Data
46
5.3 Wiring Diagram
49
5.4 Ladder Diagram
51
5.5 Component Assembly Diagrams and Parts Lists
53
5.6 Installation Check list
65
5.7 Navien ComfortAir+ Add-on Controller Kit (Optional)
67
5.8 Navien On-Demand Control Kit (Optional)
68
5.9 Requirements for the State of Massachusetts
69
Contents