Navien NCB500-1.5S/37K, Installation & Operation Manual

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2 Contents
Contents
1. Safety Information 3
2. About the Boiler 7
2.1 Items Included 7
2.2 Accessories 7
2.3 Technical Data 8
2.4 Components 11
2.5 Dimensions 13
2.6 Operating Modes 14
2.7 Installation Procedure 16
3. Installing the Boiler 17
3.1 Choosing an Installation Location 17
3.2 Mounting the Boiler to the Wall 19
4. Installing the System Piping 20
4.1 Installing a Central Heating System 20
4.2 Installing a Domestic Hot Water (DHW) System 21
4.3 Connecting the Condensate Drain Line 21
4.4 Pipe Dimensions and Water Pressure 22
4.5 Pressure Relief Valve 23
4.6 Filling the System 23
4.7 Testing the Water System 23
5. Connecting the Gas Supply 24
5.1 Gas Pipe Material 25
5.2 Propane Gas Installations (LPG) 25
5.3 Measuring the Inlet Gas Pressure 25
6. Flue System 27
6.1 Flue Terminal Positions 27
6.2 Flue Installation 28
6.3 Measuring Flue Length 30
6.4 Terminating the Flue 30
7. Setting the DIP Switches 31
7.1 PCB DIP Switches 31
7.2 Front Panel DIP Switches 31
8. Connecting Electrical Supplies 32
8.1 Accessing the Terminal Strips 32
8.2 Connecting the Power Supply Cables 33
8.3 Connecting the Switched Live 34
8.4 Connecting the Room Stat or OpenTherm 34
8.5 Connecting the Outdoor Temperature Sensor 34
8.6 OpenTherm® Protocol 34
8.7 Connecting the Navien Smart Room Controller
(Optional) 35
9. Installation Check list 36
10. Operating the Boiler 37
10.1 Using the Front Panel 37
10.2 Turning the Boiler On or Off 39
10.3 Start-Up Wizard 39
10.4 Adjusting the Temperature 39
10.5 Resetting the Boiler 40
10.6 Accessing Basic Menu Items 41
10.7 Accessing Advanced Menu Items 46
10.8 Error Codes 51
11. Maintaining the Boiler 52
11.1 Cleaning the Boiler 52
11.2 Draining the Boiler 52
11.3 Cleaning the Return Adapter Filter 53
11.4 Protecting the Boiler from Freezing 53
11.5 Maintenance Schedules 54
12. Appendices 57
12.1 Gas Conversion 57
12.2 Cleaning the Heat Exchanger 61
12.3 Wiring Diagram 64
12.4 Ladder Diagram 65
12.5 Outdoor Temperature Sensor (Optional) 66