NORITZ N-0751M OWNER'S MANUAL Pdf Download (2024)

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Tankless gas water heater

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  • Contents
  • Table of Contents
  • Troubleshooting
  • Bookmarks

Table of Contents

  • Important Safety Information

  • Table of Contents

  • Contents

  • General Parts
    • Main Unit

    • Remote Controller

  • Initial Operation

  • How to Use

    • Muting the Remote Controller

    • Setting and Using the Water Heater

    • Flow Meter Alarm

    • Adjusting the Maximum Output Temperature

  • Preventing Damage from Freezing

  • Turning the Unit Back on

  • Regular Maintenance
  • Periodic Maintenance

  • Troubleshooting
    • Amount of Hot Water

    • Error Code Cause Action
  • Follow-Up Service

  • Specifications

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  • 1 General Parts
  • 2 Main Unit
  • 3 Regular Maintenance
  • 4 Troubleshooting
  • 5 Error Code Cause Action
  • 6 Specifications
  • Download this manual

See also: Installation Manual

TANKLESS GAS WATER HEATER

Owner's Guide

WARNING

- 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.

CERTIFIED

R

Low NOx

Approved by

SCAQMD

SAR8558

Rev. 08/06

Model N-0751M

If the information in this manual is not followed exactly, a fire or explosion

may result causing property damage, personal injury, or death.

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.

NORITZ America Corporation

*SAR8558 T*

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NORITZ N-0751M OWNER'S MANUAL Pdf Download (2)

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Summary of Contents for Noritz N-0751M

  • Page 1 Installation must conform with local codes, or in the absence of local codes, SCAQMD 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. NORITZ America Corporation SAR8558 Rev.
  • Page 2: Important Safety Information

    Important Safety Information-1 To prevent damage to property and injury to the user, the icons shown below will be used to warn of varying levels of danger. Every indication is critical to the safe operation of the water heater and must be understood and observed. Potential dangers from accidents during installation and use are divided into the following three categories.
  • Page 3 3. Turn off gas and water supply • Do not try to light any valve. appliance. 4. Call the nearest Noritz agent • Do not touch any electrical switch; do not use any phone in your building. Explosion Hazard ;...
  • Page 4 Be sure (trees, timber, boxes with flammable to do. Be sure to do. materials etc.). For Natural Gas [When installing outdoors] Upper: Min. 36" N-0751M Natural Gaz Naturel 199,900 BTU Left side: 12,000 BTU Right side: Min. 6" 10.5" 0.65 2.55"...
  • Page 5 Shock. or other reproductive harm. This product may contain such substances, be their Consult the nearest Noritz agent if origin from fuel combustion (gas, oil) or the water heater location needs to components of the product itself. be changed.
  • Page 6 4500 ft. above sea level. unit for an extended period of time. Do not drink the first use of hot water from the For installations at higher elevations, contact Noritz unit in the morning. America for Instructions. Clean the filter on the water inlet as Do not disassemble the remote controller.
  • Page 7: Table Of Contents

    Contents Important Safety Information ............... 2 Contents ......................7 General Parts Main Unit ....................8 Remote Controller ..................9 Initial Operation ................... 10 How to Use Muting the Remote Controller ..............11 Setting and Using the Water Heater ............12 Flow Meter Alarm ..................
  • Page 8: General Parts

    General Parts Main Unit Indoor/Outdoor Wall Mounted, Power Vented Model Flue Collar Front Cover Air Inlet Water Drain Valve (with Water Filter) (Inside Water Inlet) p.20) Pressure Relief Valve Water Supply Valve Gas Supply Valve * The above illustration shows an example of installation. The exact installation configuration may be slightly different.
  • Page 9: Remote Controller

    Remote Controller (RC-7649M) What is actually displayed depends on how the water heater is set. Burner On Indicator Setting Buttons When burning, the For setting the hot indicator is lit. water temperature, p.13 and 15) the flow meter alarm, and other settings. Priority Indicator When this indicator is lit, the hot water temperature...
  • Page 10: Initial Operation

    Initial Operation Before the first use of your water heater, make the following preparations. 1 through 4 Follow steps Open the water supply valve. OPEN CLOSED Open a hot water fixture to confirm that water is available, and then close the fixture again.
  • Page 11: How To Use

    How to Use Muting the Remote Controller The remote controller will emit a sound when any button is pushed. This sound can be muted if it is desired. * Initial factory setting is with sound Hold the Power On/Off Button for five seconds. Muted Sound No sound...
  • Page 12: Setting And Using The Water Heater

    How to Use Setting and Using the Water Heater (Starting with the Power Off) Press the Power On/Off Button. The temperature will be displayed on the remote control thermostat. Previous set temperature (Ex.: 110°F) DANGER To prevent scalding: High Temperature Hot Water Heater temperatures over 125°...
  • Page 13 The temperature settings below are examples. The temperature setting °F : necessary depends on the usage, the length of piping and the time of year. The maximum output temperature Contact the installer or Noritz America can be set using the remote when setting the maximum output tem- controller.
  • Page 14: Flow Meter Alarm

    How to Use Flow Meter Alarm (Starting with the power off) Set temperature. Press the Power Preparation Always check On/Off Button temperature setting before use. 1. Plug the bath drain. Cold The temperature will be displayed on the remote control thermostat. Check the indicator lights.
  • Page 15 Water Temperature An alarm will sound for ten seconds when the flow The temperatures settings below are only examples. The °F : temperature setting necessary will depend on the usage, reaches the set level. the length of piping and the time of year. Warm Warmer The water will continue to run unless it is...
  • Page 16: Adjusting The Maximum Output Temperature

    How to Use Adjusting the Maximum Output Temperature Change the Turn off the Press and hold the flow temperature using power. meter alarm set button until the setting buttons. a sound is heard (2 sec.). Tone sounds after 2 sec. Down The upper limit of the hot- water supply temperature can...
  • Page 17: Preventing Damage From Freezing

    * The freeze prevention heaters will not prevent the plumbing external to the unit from freezing. Protect this plumbing with insulation, heat tape or electric heaters, solenoids, or pipe covers. If there remains a freezing risk, contact the nearest Noritz agent. Take the measures below for extremely cold temperatures*.
  • Page 18: Turning The Unit Back On

    Preventing Damage from Freezing-2 If the water heater will not be used for a long period of time, Drain the water. Drain the water as follows: CAUTION To avoid burns, wait until the equipment cools down before draining the water. The appliance will remain hot after it is turned off.
  • Page 19: Regular Maintenance

    Regular Maintenance-1 Periodic Inspection CAUTION To prevent burns or scalding, turn off the power button and wait until the equipment cools before performing maintenance. Be sure to do. For dust and soot in For laundry, newspaper, timber, Check Check the exhaust vent or oil, spray cans and other exhaust vent terminal.
  • Page 20: Periodic Maintenance

    Periodic Maintenance Water Drain Valve (with Water Filter) If the water drain valve (with water filter) is covered with debris, the hot water may not run smoothly, or the unit may put out cold water. Check and clean the filter as explained below. * To avoid burns, wait until the equipment cools down before draining the water.
  • Page 21: Troubleshooting

    Troubleshooting-1 Initial Operation • Check for reversed plumbing or crossed pipes. Unit does not attempt to ignite • Check the water drain valve filter. ( p.20 ) when water is running. Unit attempts to ignite but fails • Reset unit and try again. There may be air in the gas line. •...
  • Page 22: Amount Of Hot Water

    Troubleshooting-2 (Continued) The water is not hot enough. • Are the gas and water supply valves fully open? • Is the water temperature setting appropriate? p.12 and p.13) • If the amount of hot water required is very high, it is possible for the temperature to be lower than the temp- erature set on the remote controller.
  • Page 23 Remote Controller • Has there been a power failure? The light on the power button does not come on. • Is the power connected properly? The water temperature changes • The temperature setting and the flow meter alarm setting after a power failure or when the may both need to be reset after a power outage.
  • Page 24: Error Code Cause Action

    Abnormal combustion, Have a professional check the gas supply pressure. low gas supply pressure Contact the nearest Noritz agent. Abnormal combustion Contact the nearest Noritz agent. Contact Noritz America if: • Any other error code appears.
  • Page 25: Follow-Up Service

    For repairs after the warranty period, there will be a charge on any service, and service will only be performed if the unit is deemed repairable. Period of Time for Stocking Repair Parts Noritz will stock repair and maintenance parts for this unit within ten (10) years of the date of original installation. Reinstallation If you want to reinstall the appliance at a different location, confirm that the gas and power supply indicated on the rating plate are available at the new location.
  • Page 26: Specifications

    • Specifications may be changed without prior notice. Specifications • The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. Specifications Item Specification Model Name N-0751M Type Installation Indoor/ Outdoor, Wall Hanging Air Supply/Exhaust Power Vented Ignition Direct Ignition...
NORITZ N-0751M OWNER'S MANUAL Pdf Download (2024)

FAQs

What is the lifespan of a Noritz tankless water heater? ›

A: The average lifespan is between 10 and 25 years, depending on how well it is maintained. We do recommend annual maintenance on a Noritz tankless water heater. As long as you make sure you provide it with proper care, it can last a long time.

What temperature should a Noritz tankless water heater be set at? ›

Now, preset from the factory, it won't let you go above 120 deg for safety. It says right down here. To let you know, when you start going over 125 degrees, you do increase the risk of scalding, so just be aware of that.

Why does my Noritz tankless keep shutting off? ›

Noritz tankless water heaters that continuously shut off may have problems with circuit board settings or other underlying issues. Try unplugging the heater for 30 seconds and then plugging it back in.

How to tell the age of a Noritz tankless water heater? ›

The serial number of the Noritz Tankless Water Heater is at the bottom of the data plate on the unit. The first four digits are the year it was manufactured. The month, shown here at “06,” mean June. The fifth and sixth digits indicate the month.

Do tankless water heaters need to be flushed every year? ›

Just like a tank unit, tankless water heaters need to be flushed once per year. Homeowners with hard water should consider flushing and cleaning the unit even more frequently, perhaps every six to nine months because of the excess amounts of magnesium and calcium found in hard water supplies.

Do tankless water heaters need to be serviced every year? ›

Here's a look at how often you should perform maintenance on your tankless water heater: Generally, your tankless water heater should be serviced at least once every year. If you have hard water, then you might need to service it twice yearly.

Is 140 too high for tankless water heater? ›

The Department of Energy and water heater manufacturers have different opinions. 120 degrees Fahrenheit is the safety recommendation against scalding, but 140° is the common default setting.

Is 130 too hot for tankless water heater? ›

Actually, they are the same. The recommended temperature setting from the Consumer Product Safety Commission for a tank and tankless water heaters is 120 degrees.

What number should my tankless water heater be set at? ›

What temperature should a tankless water heater be set to? For most residential uses, a temperature setting of 120° - 125°F is sufficiently hot and will protect against scalding. You can set your residential tankless water heater higher, but know that a child can be burned by 140°F water in just a couple of seconds.

Can I leave my tankless water heater on all the time? ›

It will be in the final stages of its functionality. Therefore, going on vacation without turning it off exposes you to more risks than expected. Your tankless water heater is likely to overheat and burn out in old age. This can result in damages that can be difficult to fix.

How do I know if my tankless water heater is bad? ›

Your tankless water heater may need to be serviced if:

You have noticed a sudden change in water quality: Water that is cloudy, rusty, or filled with sediment is a major sign something is wrong with your tankless heater.

How long is Noritz water heater warranty? ›

12 years or 6500 operational (burn) hours as recorded by the water heater, whichever occurs first. An aquastat is the minimum pump control requirement in order to maintain the full recirculation warranty.

What is the life expectancy of a Noritz water heater? ›

Long-lasting and reliable:

Double the lifespan – Noritz tankless gas water heaters can last up to 20 years. Peace of Mind – All Noritz instant hot water heaters include a 12-year warranty on the heat exchanger, 5 years on parts and 1 year labor.

Is Noritz a good tankless water heater? ›

Noritz is a leading manufacturer and provider of high-quality tankless water heaters used all across the country.

How do you know when a tankless water heater needs to be replaced? ›

If your tankless heater suddenly produces water that's cloudy or reddish or brownish in color, there's a problem. You may have too much sediment in the tank or it might be rusting from the inside. Replacing it with a new unit will make a big difference in the quality of the hot water output you get.

What is the life expectancy of a tankless water heater? ›

A tankless water heater can last anywhere from 15 to 20 years with proper maintenance and operation. In comparison, a standard tank water heater normally has a working life of 10 years or less. How Do Tankless Water Heaters Work?

How long is Noritz warranty? ›

10 years on heat exchanger (Pro-rated after first 5 years)1-5 years, Free replacement5-7 years, Noritz will provide a replacement heat exchanger at 25% of cost7-8 years, Noritz will provide a replacement heat exchanger at 50% of cost9-10 years, Noritz will provide a replacement heat exchanger at 75% of cost2.

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