Navien NFC Series - User Manual

Getting Service
If your boiler requires service, you have several options for getting service:
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Contact Technical Support at 1-800-519-8794 or on the website: www.navien.com.
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For warranty service, always contact Technical Support first.
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Contact the technician or professional who installed your boiler.
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Contact a licensed professional for the affected system (for example, a plumber or electrician).
When you contact Technical Support, please have the following information at hand:
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Model number
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Serial number
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Date purchased
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Installation location and type
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Error code, if any appears on the front panel display.
800.519.8794 www.Navien.com
20 Goodyear lrvine, CA 92618
User’s Information Manual
NFC Condensing Combi-Boilers
THE LEADER IN CONDENSING TECHNOLOGY
Version: 1.0 (Nov 26, 2018)

Navien NFC Series Specifications

General

Model	NFC Series
Fuel Type	Natural Gas or Propane
Vent Type	Direct Vent
Heat Exchanger Material	Stainless Steel
Efficiency	95% AFUE
Warranty	5-Year Limited Parts Warranty
Venting	PVC, CPVC
Type	Condensing Fire Tube Combi-Boiler (NFC-150, NFC-175, NFC-200), Condensing Fire Tube Boiler (NFC-250, NFC-300)

Summary

Boiler Service and Support

Contacting Technical Support

Options for contacting support, including phone and website for service and warranty.

Information Required for Support

Details like model number, serial number, date purchased, and error code needed for service.

Model Identification

Key Safety Warnings and Gas Procedures

Understanding Safety Symbols and Precautions

Gas Leak Procedures

Steps to take if gas is detected, including avoiding electrical switches and using phones.

General Boiler Operation Safety

Electrical Safety and Component Handling

Emphasizes turning off power before electrical work and avoiding wet hands with components.

California Proposition 65 Chemical Warning

Provides the required warning regarding exposure to certain chemicals.

Hot Water Burn Risk Prevention

Water Temperature and Scald Risk

Explains how water temperature relates to burn severity and time.

Navien Boiler Features and Protection

Boiler Parts and Connection Identification

Identifies front and bottom views of the boiler, detailing connection ports.

Front Panel Display Icons and Indicators

Interpreting Operating Indicators

Details icons for system status, heating demand, temperatures, and pressure.

Front Panel Controls and Navigation

Navigating Boiler Settings and Menus

Details how to use buttons and the command dial for settings and confirmation.

Boiler Power On;Off Operation

Setting Space Heating Temperature

Step-by-step guide to set the desired space heating water temperature.

Setting DHW Water Temperature

Accessing Boiler Main Menu

How to access and navigate the main menu for settings and status.

Monitoring Boiler Operational Parameters

Boiler Reset Procedure

Procedure to reset the boiler to resolve operational issues or error codes.

Cleaning the Boiler Exterior

Draining the Boiler for Service

Steps to safely drain the boiler for maintenance or freeze protection.

Air Intake Filter Cleaning and Maintenance

Detailed Air Intake Filter Cleaning

Boiler Freeze Protection Guidelines

Scheduled Boiler Maintenance Tasks

Outlines daily, monthly, and annual maintenance tasks for owners and technicians.

Interior Inspection and Cleaning Procedures

Piping and Vent System Integrity Checks

Procedures for checking water, gas, flue, and air piping for leaks and obstructions.

Water System and Pressure Monitoring

Pressure Relief and Ignition System Checks

Details inspection of relief valves and ignition/flame detector electrodes.

Wiring, Settings, and Burner Checks

Heat Exchanger Flushing Preparation

Introduction and necessary items for flushing the heat exchanger.

Heat Exchanger Flushing Execution

Troubleshooting Common Boiler Issues

Resolving No Water or Temperature Problems

Specific solutions for issues like no hot water or insufficient hot water.

Boiler Error Code Definitions

More Boiler Error Code Details

Navien Limited Warranty Coverage

Getting Warranty Service and Making Claims

Explains how to get service and what proof is required for warranty claims.

Warranty Exclusions and Voiding Conditions

Warranty Limitations and User Rights

Explains limitations on liability and user's specific legal rights.