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Contents
8. Installing a Cascade System
8.2 Cascade System - Recirculation System
8.3 Connecting the Communication Cables
9. Installing a Common Vent System
9.1 About the Common Vent System
9.2 Navien Common Vent Collar Kit (Back-
9.3 Starting the Common Vent System
9.4 Connecting and Terminating the Vent
9.5 Setting up the Common Vent System
9.6 Common Vent Termination Clearances
9.7 Installing a Condensate Drain
11.1 Operating the Boiler for the First Time
11.2 Turning the Boiler On or Off
11.4 Adjusting the System Temperatures
11.5 Accessing Basic Menu Items
11.6 Accessing Advanced Menu Items
11.7 Understanding Error Codes
12.1 Gas & High Altitude Conversion
12.4 Outdoor Temperature Sensor
12.6 Component Assembly Diagrams and
2.1 Removing the Wood Pallet from the boiler
2.2 Choosing an Installation Location
2.3 Mounting the Boiler to the Wall
3. Installing the System Piping
3.1 Installing a Space Heating System
3.2 Installing a Domestic Hot Water (DHW)
3.3 Connecting the Condensate Drain
3.6 Considerations for System Applications
3.7 Examples of Electrical Connections
4.2 Measuring the Inlet Gas Pressure
5.2 About the Vent Installation Detector
5.4 Selecting Vent Pipe Materials
6.1 DIP Switch 1 (Set of 6 Switches)
6.2 Dip Switch 2 (Set of 8 Switches)
7. Connecting the Power Supply
Contents
Summary of Contents for NFC-250/175H
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