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Navien NHW700 User Manual

Navien NHW700
27 pages
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Getting Service
If your water heater requires service:
All repairs require pre-authorization by Technical Support.
Request for your installer or any licensed professional to contact Technical Support at
1-800-519-8794 Option 2 once at the installation site.
A short list of independent service providers in your area can be found on the website:
www.navieninc.com/installers.
Contact a licensed professional for the affected system (for example, a plumber, gas fitter,
or electrician).
When you contact Technical Support, please have the following information at hand:
Model number
Serial number
Date purchased
Installation location and type
Error code, if any appears on the front panel display
800.519.8794 www.navieninc.com
20 Goodyear lrvine, CA 92618
Users Information Manual
NHW700 Non-Condensing Water Heaters
TANKLESS WATER HEATERS · BOILERS
Version: 1.0 (August, 2023)

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Questions and Answers:

Navien NHW700 Specifications

General IconGeneral
BrandNavien
ModelNHW700
CategoryWater Heater
LanguageEnglish

Summary

Important Safety Information

Safety Alert Symbols

Defines safety alert symbols like DANGER, WARNING, CAUTION, NOTICE used in the manual.

General Safety Warnings

Provides crucial safety instructions to prevent fire, explosion, or death from gas leaks.

Burn Prevention

Advises on setting water temperature to prevent scalding, especially for children and the elderly.

Gas and Electrical Safety

Warns about gas supply, flammable liquids, combustibles, and electrical safety during operation.

Venting and CO Safety

Emphasizes proper venting to prevent carbon monoxide poisoning and electrical shock hazards.

Cautions for Operation and Maintenance

Lists cautions for attempting repairs, operating with issues, children's access, and water/gas supply.

About the Water Heater

Model Description

Describes the NHW700-A series water heater models and their features.

Unit Components

Identifies key parts of the water heater through front and bottom views.

Front Panel Overview (Indoor Models)

Explains the functions of buttons and indicators on the indoor model's front panel.

Remote Controller Overview

Details the LCD display, buttons, and indicators of the remote controller for outdoor/indoor models.

Operating the Water Heater

Powering the Water Heater On/Off

Instructs how to turn the water heater on or off using the power button on the unit or remote.

Adjusting Water Temperature

Guides users on how to adjust the water temperature using the up/down buttons.

Viewing Basic Information (Indoor Models)

Explains how to access and view basic information like flow rate and temperatures on the indoor unit.

Resetting the Water Heater

Describes how to reset the water heater to resolve error messages.

Temperature Lock Mode

Details how to activate/deactivate temperature lock mode to prevent accidental changes.

Setting the Clock

Provides step-by-step instructions for setting the clock on the remote controller.

Setting Recirculation Timer

Explains how to set the activation and deactivation times for the recirculation feature.

Starting Recirculation

Describes how to manually start the recirculation feature regardless of the timer.

Canceling Timer Settings

Details the procedure to cancel all timer settings by pressing specific buttons.

Maintaining the Water Heater

Cleaning the Water Heater Exterior

Provides instructions on how to clean the outside of the water heater safely.

Draining the Water Heater (Part 1)

Explains the initial steps for draining the water heater before maintenance.

Draining the Water Heater (Part 2)

Continues the draining procedure, including closing valves and removing filters.

Flushing the Heat Exchanger

Offers instructions and warnings for flushing the heat exchanger due to water quality.

Water Quality Guidelines

Presents a table of contaminant levels and recommended treatment/flushing frequencies.

Heat Exchanger Flushing Procedure

Provides a detailed step-by-step guide for flushing the heat exchanger using a kit.

Cleaning Inlet Water Filters

Explains how to remove, rinse, and reinsert the cold water and recirculation inlet filters.

Preventing Freezing Damage

Offers guidelines and notices regarding protection against freezing and warranty.

Freeze Protection Guidelines

Details how to ensure the water heater does not freeze, including power supply and draining.

Thawing a Frozen Water Heater

Provides steps to follow if the water heater is suspected to be frozen.

Troubleshooting

Solving Basic Problems

Presents a chart of common problems, their causes, and solutions.

LIMITED WARRANTY NAVIEN, INC.

Warranty Coverage Periods

Outlines the warranty duration for labor, parts, and heat exchanger based on application.

How to Get Service

Explains the procedure for obtaining warranty service and required documentation.

What is Not Covered by Warranty

Lists conditions and actions that will void the Navien limited warranty.

Warranty Limitations

Warranty Limitations and Disclaimers

Details explicit warranty limitations and disclaimers regarding merchantability and fitness for purpose.

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