Table Of Contents; Setting The Dip Switches And Parameters For The Terminal Blocks 1 And - Navien NCB-20LHWE Installation & Operation Manual

Contents
1. Safety Information
2. About the Boiler
2.1 Items Included
2.2 Accessories
2.3 Technical Data
2.4 Components
2.5 Dimensions
2.6 Operating Modes
2.7 Installation Procedure
3. Installing the Boiler
3.1 Choosing an Installation Location
3.2 Mounting the Boiler to the Wall
4. Installing the System Piping
4.1 Installing a Space Heating System
4.2 Installing a System Application
4.3 Connecting the Condensate Drain Line
4.4 Pressure Relief Valve
4.5 Filling the system
4.6 Testing the Water System
5. Connecting the Gas Supply
5.1 Gas Pipe Material
5.2 Propane Gas Installations (LPG)
5.3 Measuring the Inlet Gas Pressure
6. Flue System
6.1 Flue Terminal Positions
6.2 Selecting a Flue System
6.3 Coaxial Systems
6.4 Dual Duct Systems
6.5 Measuring Flue Length
6.6 Terminating the Flue
7. Setting the DIP Switches
7.1 PCB DIP Switches
7.2 Front Panel DIP Switches
2 Contents
3 8. Connecting Electrical Supplies
8.1 Accessing the Terminal Blocks
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8.2 Connecting the Power Supply Cables
8.3 Setting the DIP Switches and Parameters for the
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Terminal blocks 1 and 2
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8.4 Terminal block 1 Connection
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8.5 Terminal block 2 Connection
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9. Wiring Examples for Di erent Applications 39
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9.1 Connecting the Navien Smart Room Controller
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(Optional)
9.2 Y Plan Applications
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9.3 S Plan Applications
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10. Installation Check list
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11. Operating the Boiler
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11.1 Turning the Boiler On or O
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11.2 Adjusting the Temperature
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11.3 Viewing Basic Information
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11.4 Setting the Operation Mode
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11.5 Setting the Parameters
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11.6 Resetting the Boiler
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12. Maintaining the Boiler
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12.1 Cleaning the Boiler
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12.2 Draining the Boiler
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12.3 Cleaning the Return Adapter Filter
12.4 Protecting the Boiler from Freezing
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12.5 Maintenance Schedules
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13. Appendices
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13.1 Gas Conversion
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13.2 Cleaning the Heat Exchanger
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13.3 Wiring Diagram
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13.4 Ladder Diagram
13.5 Outdoor Temperature Sensor (Optional)
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