Navien NCB-150E User Manual

WARNING
If the information in these instructions is not followed exactly, a re or explosion may result, causing
property damage, personal injury or death.
Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any other
appliance.
What to do if you smell gas
Do not try to light any appliance.
Do not touch any electrical switch; do not use any phone in your building.
Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
If you cannot reach your gas supplier, call the re department.
Installation and service must be performed by a qualied installer, service agency or the gas supplier.
The installation must conform with local codes or, in the absence of local codes, the National Fuel Gas Code,
ANSIZ223.1/NFPA 54 and/or CSA B149.1, Natural Gas and Propane Installation Code.
H
NSF/ANSI 372
Keep this manual near this boiler for future reference whenever
maintenance or service is required.
* The wetted surface of this product contacted by consumable water contains less than
one quarter of one percent (0.25%) of lead by weight.
Installation & Operation Manual
NCB-E Condensing Combi-Boilers
Model
NCB-150E
NCB-180E
NCB-210E
NCB-240E

Navien NCB-150E Specifications

General

Brand	Navien
Model	NCB-150E
Category	Boiler
Language	English

Summary

Safety Information

What to do if you smell gas

Immediate steps to take if a gas leak is detected to prevent fire or explosion.

Flammable Liquids and Vapors

Precautions regarding storing or using flammable liquids near the boiler.

General Warnings

Key warnings for safe operation, including electrical hazards and venting.

Preventing Burns

Guidelines for preventing scald injuries from hot water.

About the Boiler

Items Included

List of components provided with the boiler unit.

Accessories

List of optional accessories available for the boiler.

Specifications

Technical specifications for space heating and domestic hot water.

Components

Diagram illustrating the key internal components of the boiler.

Dimensions

Diagrams and table showing the boiler's physical dimensions and supply connections.

Rating Plate

Information found on the boiler's rating plate and its importance for installation.

Installing the Boiler

Choosing an Installation Location

Factors to consider when selecting a suitable location for boiler installation.

Mounting the Boiler to the Wall

Instructions and safety precautions for securely mounting the boiler on a wall.

Installing the System Piping

Installing a Space Heating System

Guidelines for installing the space heating system, including freeze protection.

Installing a Domestic Hot Water (DHW) System

Guidelines for installing the DHW system, including scald hazard and water quality.

Connecting the Condensate Drain

Instructions for connecting the condensate drain and neutralizer.

System Fill Connection

Procedures for filling the boiler system with water.

Testing the Water System

Steps for performing a fill test and checking for leaks.

Examples of System Applications

Illustrations of typical system configurations for heating and DHW.

Installing a Cascading System

Connecting Water Supplies

Options for connecting multiple water heaters in a cascade system.

Connecting the Communication Cables

Procedure for connecting communication cables between units.

Configuring the Communication Settings

Settings for cascade protocol and system configuration.

Connecting the Gas Supply

Gas Pipe Sizing Tables

Tables for determining appropriate gas pipe sizes based on capacity.

Measuring the Inlet Gas Pressure

Procedure for measuring and verifying inlet gas pressure.

Venting the Boiler

Selecting a Vent Type

Guidance on choosing the appropriate vent type and materials.

Selecting Vent Pipe Materials

Recommended materials for vent pipes in US and Canada.

Measuring Vent Length

Determining maximum vent lengths and the impact of elbows.

Terminating the Vent

Guidelines for proper vent termination configurations.

Setting the DIP Switches

PCB DIP Switches

Configuration settings for DIP switches on the main circuit board.

Front Panel DIP Switches

Configuration settings for DIP switches on the front panel.

Connecting the Power Supply

Installation Check list

Operating the Boiler

Turning the Boiler On or Off

Procedure for powering the boiler on and off.

Adjusting the Temperature

How to adjust space heating and DHW temperatures.

Viewing Basic Information

Displaying current boiler status and temperatures.

Setting the Operation Mode

Configuring the boiler's operational modes.

Setting the Parameters

Advanced settings for boiler operation and temperature control.

Resetting the Boiler

Procedure for resetting the boiler to resolve issues.

Appendixes

Gas Conversion

Instructions and parts for converting the boiler from Natural Gas to Propane.

Wiring Diagram

Schematic illustrating electrical connections for boiler components.

Ladder Diagram

Control logic diagram for the boiler's operation.

Component Assembly Diagrams and Parts Lists

Detailed diagrams and part numbers for boiler assemblies.

Outdoor Temperature Sensor

Installation guidelines for the optional outdoor temperature sensor.

Outdoor Reset Control

Configuration of the outdoor reset feature for energy efficiency.

Getting Service