Noritz NR71-SV User Manual

SBA8654
Rev. 01/11
Models: NR71-SV, NR71-OD* (For USA and Canada)
NR66-SV, NR66-OD* (For USA and Canada)
NR50-OD* (For USA only)
TANKLESS GAS WATER HEATER
Owner’s Guide
NORITZ America Corporation
-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.
If the information in this manual is not followed exactly, a re or explosion
may result causing property damage, personal injury, or death.
WARNING
*SBA8654*
Thank you for purchasing this Noritz Tankless Gas Water Heater. Before
using, please:
Read this manual completely for operation instructions.
Completely ll out the warranty registration card (included separately) and
mail the detachable portion to Noritz America Corporation.
Keep this manual (and the remainder of the warranty registration card) where
it can be found whenever necessary.
Installation must conform with local codes, or in the absence of local codes,
the National Fuel Gas Code, ANSI Z223.1/NFPA 54.
When applicable, installation must conform with the Manufactured Home Construc-
tion and Safety Standard, Title 24 CFR, Part 3280 or the Canadian Standard CAN/
CSA-Z240 MH Mobile Homes, Series M86.(NR71-OD, NR66-OD only)
Noritz America reserves the right to discontinue, or change at any time, the
designs and/or specications of its products without notice.
* FOR USE IN RESIDENTIAL, COMMERCIAL, OR MANUFACTURED HOME APPLICATIONS.

Noritz NR71-SV Specifications

General

Fuel Type	Natural Gas/Propane
Energy Factor	0.82
Category	Water Heater
Type	Tankless
Minimum BTU Input	15, 000 BTU/h
GPM at 35°F Rise	7.1 GPM
Voltage	120 V
Inlet/Outlet	3/4" NPT
Gas Connection	3/4" NPT
Venting	2"

Summary

Important Safety Information

Risk Level Icons

Explains warning icons used throughout the manual for hazard communication.

Other Operational Icons

Details additional icons indicating specific conditions or actions required for safe operation.

General Parts Overview

Main Unit Components

Describes the primary components and physical layout of the water heater unit.

Remote Controller Features

Remote Controller Display and Buttons

Details the layout and functions of the optional remote controller display and buttons.

Initial Operation Setup

Basic Operation (No Remote)

Manual Temperature Adjustment

Explains how to operate the water heater using only the unit's controls and manual adjustments.

Remote Controller Operation

Setting and Using the Remote

Guides users on operating the water heater using the remote controller for temperature and other settings.

Flow Meter Alarm Function

Configuring the Flow Meter Alarm

Instructions on how to configure and use the flow meter alarm feature for monitoring water usage.

Muting the Remote Controller

Disabling Controller Sounds

Describes the procedure to disable audible alerts and button feedback from the remote controller.

Adjusting Max Output Temperature

Setting Maximum Temperature Limit

Provides steps to change the maximum temperature the water heater can supply.

Preventing Freezing Damage

Regular Maintenance Checks

Periodic Inspection Procedures

Outlines checks to perform regularly to ensure the water heater is functioning correctly and safely.

Equipment & Remote Maintenance

Details routine cleaning and upkeep tasks for the unit's exterior and the remote controller.

Water Drain Valve Maintenance

Cleaning the Drain Valve Filter

Instructions for cleaning the water drain valve and filter to maintain proper water flow and temperature.

Optional Maintenance Features

Isolation Valve Benefits

Details the purpose and benefits of optional isolation valves for diagnostics and flushing.

Troubleshooting - Initial Operation & Temperature

Startup and Ignition Problems

Addresses issues related to the unit's first-time ignition and startup procedures.

Water Temperature Issues

Covers problems with water being too hot, not hot enough, or taking time to heat.

Hot Water Availability Problems

Diagnoses situations where hot water is unavailable or has insufficient flow when a fixture is opened.

Troubleshooting - Remote & Sounds

Remote Controller Malfunctions

Explains problems with the remote controller's display, buttons, and overall functionality.

Interpreting Operational Sounds

Identifies normal operational sounds and their meaning for user reassurance.

Other Operational Issues

Addresses issues like unit stopping, white smoke, turbid water, or blue discoloration.

Water Quality Guidelines

Troubleshooting - Error Indicators

Unit Error Light Indicators

Explains how to interpret flashing lights on the unit as error indicators and their causes.

Remote Controller Error Codes

Details numerical error codes displayed on the remote controller and their corresponding troubleshooting actions.

Follow-up Service and Warranty

Requesting Technical Support

Provides instructions on how to contact Noritz for technical support and service requests.

Warranty Registration and Coverage

Outlines warranty coverage, registration, and repair policies.

Repair Parts & Reinstallation

Informs users about stocked parts and guidance for relocating the appliance.

Gas Conversion Procedure

Selecting the Correct Conversion Kit

Explains the procedure and requirements for converting the unit to a different gas type.

NR71 Series Specifications

NR71-SV/NR71-OD Technical Details

Lists detailed technical specifications for the NR71-SV and NR71-OD models.

NR66 Series Specifications

NR66-SV/NR66-OD Technical Details

Lists detailed technical specifications for the NR66-SV and NR66-OD models.

NR50 Series Specifications

NR50-OD Technical Details

Lists detailed technical specifications for the NR50-OD model.