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General| Category | Boiler |
|---|---|
| Brand | Navien |
| Model | NCB700-42C |
| Fuel Type | Natural Gas / Propane |
| Max. DHW Input (BTU/hr) | 199, 900 |
| Efficiency | 95% AFUE |
| Gas Connection Size (in) | 3/4 |
| Vent Type | Direct Vent |
| Ignition Type | Electronic |
| Type | Combination Boiler |
| Vent Size (in) | 3 |
| Hot Water Flow Rate | 9.8 GPM |
| Warranty | 15 years |
Details the meaning of DANGER, WARNING, and CAUTION symbols used throughout the manual.
Instructions for gas leaks, flammable materials, and electrical safety.
Warnings for operation with open cover, improper flue, and wet hands.
Precautions and risks associated with high water temperatures and scalding.
Lists all items found inside the boiler packaging box.
Lists optional accessories available for the boiler.
Detailed specifications and performance data for the boiler models.
Identifies key internal components of the boiler with a diagram.
Shows boiler dimensions and details supply connection points.
Explains how to operate the boiler in central heating and DHW modes.
Provides a flowchart of the recommended installation steps.
Factors for selecting a suitable boiler installation location.
Instructions and safety for securely mounting the boiler.
Guidelines for installing the central heating system.
Method and guidelines for installing the DHW system.
Requirements for connecting the condensate drain line.
Recommended pipe dimensions and water pressure.
Requirements for the pressure relief valve and its drain.
Steps for filling the boiler and checking for leaks.
Recommendations for gas pipe material, connection, and sealing.
Specific safety and installation advice for LPG conversions.
Procedure for measuring and verifying inlet gas pressure.
Minimum distances for flue terminal placement.
Guidance on choosing between coaxial and dual duct flue systems.
Installation details for coaxial flue systems.
Installation details for dual duct flue systems.
How to measure flue length and account for elbows.
Considerations for flue termination location and clearances.
How to configure boiler settings using PCB DIP switches.
How to configure fuel selection using front panel DIP switches.
Steps to access the PCB terminal strips for wiring.
Instructions for safely connecting the main power supply cables.
How to connect switched live, room stat, OpenTherm, and sensors.
Checklist of essential checks after boiler installation.
Overview of front panel display, buttons, and basic operation.
Simple instructions for powering the boiler on and off.
Guide for completing the initial setup wizard for the boiler.
How to adjust central heating and DHW temperatures.
Procedure for resetting the boiler to resolve error messages.
How to navigate basic and advanced menu items for boiler settings.
Lists common error codes and their possible remedies.
Instructions for cleaning the exterior of the boiler.
Steps to drain water from the boiler for maintenance or freeze protection.
Procedure for cleaning the filter in the return adapter.
Measures and functions to prevent the boiler from freezing.
Recommended maintenance tasks for owners and technicians.
Detailed steps for converting the boiler from Natural Gas to LPG.
Annual procedure for cleaning the boiler's heat exchanger.
Electrical schematic illustrating component connections.
Control logic diagram for the boiler's electrical system.
Instructions for installing the optional outdoor temperature sensor.
Checklist for completing boiler installation and commissioning.
Forms for recording regular service and maintenance history.
