Navien NPE-150S 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
Ɣ
Do not try to light any appliance.
Ɣ
Do not touch any electrical switch; do not use any phone in your building.
Ɣ
Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
Ɣ
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.
When applicable, the installation must conform with the Manufactured Home Construction and Safety
Standard, Title 24 CFR, Part 3280 and/or CAN/CSA Z240 MH Series, Mobile Homes.
* Lead Free
Keep this manual near this water heater 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
NPE Condensing Water Heaters
Model
NPE-180A
NPE-210A
NPE-240A
NPE-150S
NPE-180S
NPE-210S
NPE-240S
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Navien NPE-150S Specifications

General

Type	Tankless
Maximum BTU Input	150, 000 BTU/hr
Energy Factor	0.96
Gas Connection	3/4 inch NPT
Water Connection	3/4 inch NPT
Voltage	120V
Temperature Range	98°F - 140°F
Venting	2 inch PVC/CPVC
Warranty	15 years heat exchanger, 5 years parts

Summary

Safety Information

Safety Symbols and Gas Leak Procedures

Explains safety symbols (DANGER, WARNING, CAUTION) and gas leak response.

General Safety Precautions and Burn Prevention

Covers general safety, Prop 65 warning, and burn prevention tips.

Water Heater Overview

Product Details: Included Items, Specs, Components, and Rating Plate

Lists included items, accessories, specifications, components, and rating plate information.

Front Panel, Dimensions, and Diagrams

Explains front panel controls, dimensions, and provides component diagrams.

Installation Guide

Site Selection and Preparation

Guidelines for choosing a location, considering utilities, drainage, and combustion air.

Gas Supply Connection and Sizing

Procedures for connecting gas and water supplies, including pipe sizing and pressure testing.

Water Supply and Pressure Relief Valve

Steps for connecting water supply and installing the pressure relief valve.

Venting System Installation

Safety and procedural guidance for installing the venting system, including common vents.

Power Supply and Configuration

Instructions for connecting power and configuring the unit using DIP switches.

Advanced System Installations

Cascade System Setup

Guidance on plumbing and configuring multiple water heaters in a cascade system.

Common Vent System Installation

Procedures and safety requirements for installing a common vent system for multiple units.

Operating the Water Heater

Basic Operation and Temperature Control

How to turn the unit on/off, adjust temperature, and use Commercial Mode.

Advanced Operation and Settings

Explanation of operation modes, parameter settings, and pump functions.

Resetting and Troubleshooting Support

Steps for resetting the water heater and where to find troubleshooting help.

Appendixes and Resources

Gas Conversion and Technical Data

Procedures for gas conversion, technical data tables, and diagrams.

Installation Checklists and Special Requirements

Comprehensive checklists for installation and specific state requirements.

Optional Controller Kits

Information on optional H2Air and HotButton controller kits.