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Noritz N-0751M-OD User Manual

Noritz N-0751M-OD
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SAR8559-2
Rev. 03/08
Model N-0751M-OD
TANKLESS GAS WATER HEATER
Owners Guide
*SAR8559 T*
NORITZ America Corporation
Thank you for purchasing this Noritz Tankless Gas Water Heater.
Before using, please:
Read this manual completely for operation instructions.
Completely fill 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.
Noritz America reserves the right to discontinue, or change at any time, the
designs and/or specifications of its products without notice.
Low NOx
Approved by
SCAQMD
CERTIFIED
R
- Do not store or use gasoline or other flammable 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 fire department.
- Installation and service must be performed by a qualified installer, service
agency or the gas supplier.
If the information in this manual is not followed exactly, a fire or explosion
may result causing property damage, personal injury, or death.
WARNING

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Noritz N-0751M-OD Specifications

General IconGeneral
BrandNoritz
ModelN-0751M-OD
CategoryWater Heater
LanguageEnglish

Summary

Important Safety Information-1

Safety Icons and Warnings

Explains the meaning of risk level icons (DANGER, WARNING, CAUTION) and other symbols used in the manual.

Flammable Liquids and Vapors

Warns about fire and explosion risks associated with storing or using flammable materials near the heater.

Hot Water Scalding Risks

Alerts to the danger of severe burns from excessively hot water, especially for children, elderly, or disabled.

Important Safety Information-2

Installation Environment and Clearance

Covers restrictions on indoor installation, maintaining clearances, and avoiding enclosed spaces.

Flammable Materials and Vapors

Warns against storing or using flammable liquids, vapors, or combustibles near the unit.

Gas/Power Specification Check

Stresses ensuring gas and power supply match the unit's rating plate for safe operation.

Important Safety Information-3

Water Quality, Cleaning, and Scale

Advises on cleaning the water inlet filter and managing water hardness to prevent scale formation.

Operation Precautions and Freezing

Covers running water through the unit, preventing freezing, and checking vents.

Remote Controller Care and Usage

Provides instructions on cleaning, handling, and proper use of the remote controller.

General Parts

Main Unit Components

Illustrates and labels the primary components of the outdoor wall-hanging main unit.

Remote Controller (RC-7649M)

Remote Controller Display and Indicators

Explains the display screen, Burner On Indicator, and Priority Indicator on the remote.

Remote Controller Buttons

Details the function of Power On/Off, Setting Buttons, and Flow Meter Alarm Set buttons.

Error Code Indicator

Describes how error codes are displayed on the remote controller when a failure occurs.

Initial Operation

Water and Gas Supply Valve Setup

Details opening the water and gas supply valves as part of the initial setup process.

Fixture and Power Confirmation

Covers confirming water availability via a fixture and turning on the power.

How to Use

Muting the Remote Controller

Explains how to mute or unmute the audible feedback sounds from the remote controller.

Setting and Using the Water Heater

Powering On the Heater

Describes pressing the Power On/Off button to start the water heater operation.

Preventing Scalding

Warns about scalding risks from water over 125°F and advises caution when using the unit.

Setting the Water Temperature

Explains how to set and adjust the desired water temperature using the remote control.

Flow Meter Alarm

Preparation and Power On

Details preparation steps and powering on the unit before setting the flow meter alarm.

Setting Water Temperature

Guides on setting the desired water temperature before configuring the flow meter alarm.

Adjusting the Maximum Output Temperature

Power Off and Button Hold

Instructs to turn off the power and hold the flow meter alarm set button to initiate temperature adjustment.

Temperature Adjustment Process

Details using the setting buttons to change the maximum output temperature of the hot water.

Preventing Damage from Freezing-1

Freeze Prevention Heater Operation

Explains the automatic freeze prevention heater and its limitations when the power is unplugged.

External Plumbing Protection

Advises on protecting external plumbing with insulation or heat tape against freezing.

Cold Temperature Measures

Provides steps for preventing freezing in extremely cold temperatures, including running hot water.

Regular Maintenance-1

Periodic Inspection Checklist

Lists items to check for periodic inspection, including combustibles, sounds, appearance, and leaks.

Equipment Surface Cleaning

Guides on cleaning the exterior of the main equipment with a wet cloth and mild detergent.

Remote Controller Cleaning

Provides instructions for cleaning the remote controller surface with a wet cloth, avoiding harsh chemicals.

Troubleshooting-1

Initial Operation Issues

Addresses problems like unit not igniting or attempting to ignite but failing.

No Hot Water or Incorrect Temperature

Covers scenarios where hot water is unavailable, too hot, or takes time to heat.

Troubleshooting-3

Checking for Error Codes

Explains how to identify and interpret error codes displayed on the remote controller.

Follow-up Service

Requesting Service and Warranty

Details procedures for requesting service, including initial troubleshooting and warranty information.

Repair Parts and Reinstallation

Covers stocking periods for repair parts and guidelines for appliance reinstallation.

Specifications

Unit Identification and Physical Specs

Covers model name, type, dimensions, weight, connections, and installation details.

Power, Materials, and Safety Features

Details power supply, materials used, safety devices, and included accessories.

Performance and Temperature Settings

Outlines performance metrics, consumption, hot water capacity, and temperature options.

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