Noritz N-0631S Owner's Manual
Tankless gas water heater
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- Installation manual (64 pages) ,
- Field manual (60 pages) ,
- Instructional manual (8 pages)
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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
SAR8583-2
Rev. 03/08
Model N-0631S
N-0631S-OD
N-0531S
N-0531S-OD
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
*SAR8583 T*
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Table of Contents
Related Manuals for Noritz N-0631S
Summary of Contents for Noritz N-0631S
- 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 SAR8583-2 Rev.
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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 four categories. - Page 3 • Do not try to light any appliance. 3. Turn off gas and water supply valve. • Do not touch any electrical 4. Call the nearest Noritz agent switch; do not use any phone in your building. • Immediately call your gas supplier Explosion Hazard ;...
- Page 4 Be sure (trees, timber, boxes with flammable to do. Be sure to do. materials etc.). Ex. For Natural Gas N-0631S [When installing outdoors] Upper: Min. 36" N-0631S N-0631S Left side: 180,000 BTU 180,000 BTU...
- 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. Do not disassemble the remote controller.
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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 (Not using the remote controller) Setting and Using the Water Heater ............11 How to Use (Using the remote controller) Setting and Using the Water Heater ............ -
Page 8: General Parts
General Parts Main Unit N-0631S, N-0531S Indoor/Outdoor Wall Mounted, Power Vented Model Flue Collar Front Cover Air Inlet Water Drain Valve (with Water Filter) (Inside Water Inlet) p.21) Pressure Relief Valve Water Supply Valve Gas Supply Valve (Ex. N-0631S) N-0631S-OD, N-0531S-OD... -
Page 9: Remote Controller
Remote Controller (RC-7649M) <Optional> The illustration below shows the remote controller display. 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. -
Page 10: Initial Operation
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. Hot water fixture Open the gas supply valve. Turn on the power. (Ex. N-0631S) -
Page 11: How To Use (Not Using The Remote Controller)
Turn off the hot water. The electrical power does not need to be disconnected between uses. If you want to the temperature to be changed to 130°F or 140°F, contact the installer or Noritz. DANGER To prevent scalding. Hot Water Heater temperatures over 125°F can cause severe burns instantly or death from scalding. -
Page 12: How To Use (Using The Remote Controller)
How to Use (Using the remote controller) 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°F can cause severe burns instantly or death from scalding. - 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 tempera- Contact the installer or Noritz ture can be set using the re- America when setting the mote controller. ( p.17)
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Page 14: Flow Meter Alarm
How to Use (Using the remote controller) 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. - 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...
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Page 16: Muting The Remote Controller
How to Use (Using the remote controller) 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. -
Page 17: Adjusting The Maximum Output Temperature
How to Use (Using the remote controller) Adjusting the Maximum Output Temperature Change the Turn off the Press and hold the flow temperature using meter alarm set button until power. the setting buttons. a sound is heard (2 sec.). Tone sounds after 2 sec. -
Page 18: 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*. <Only using the remote controller>... -
Page 19: Turning The Unit Back On
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. High Temperature Drain water into a bucket to prevent water damage. -
Page 20: Regular Maintenance
Check pressure relief valve. For water leaks from the Check equipment and piping. (Ex. N-0631S) Periodic Maintenance Equipment Wipe the outside surface with a wet cloth, then dry the surface. Use a neutral detergent to clean any stains. Remote Controller Wipe the surface with a wet cloth. -
Page 21: Periodic Maintenance
* The kit includes two full port isolation valves and a pressure relief valve for the hot side. Hot Water Service Valve Contact Noritz for more information. Cold Water Pressure Relief Valve Service Valve Drain (Ex. N-0631S) -
Page 22: Troubleshooting
Troubleshooting-1 Initial Operation Unit does not attempt to ignite • Check for reversed plumbing or crossed pipes. when water is running. • Check the water drain valve filter. ( p.21) • Reset unit and try again. There may be air in the gas line. Unit attempts to ignite but fails •... -
Page 23: Amount Of Hot Water
N-0531S, N-0531S-OD is 5.3 GPM at a 45°F temperature rise. The maximum flow available from the N-0631S, N-0631S-OD is 6.3 GPM at a 45°F temperature rise. • Pressure fluctuations and other plumbing conditions can cause the temperature and pressure at a fixture to be unstable, but it should stabilize after a short time. -
Page 24: Remote Controller
Troubleshooting-2 Remote Controller • Has there been a power failure? The light on the power button • Is the power connected properly? does not come on. 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 25 Check for an Flashing Light on the Unit <Not using the remote controller> [Error displays on the lamp] (N-0631S and N-0631S-OD only) If there is a problem with the unit, a lamp will flash on the front of the unit.
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Page 26: 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 27: Specifications
• Specifications may be changed without prior notice. Specifications-1 • The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. Specifications Item Specification Model Name N-0631S-OD N-0631S Type Installation Indoor/ Outdoor, Wall Mounted Outdoor, Wall Mounted Power Vented Air Supply/Exhaust... - Page 28 • Specifications may be changed without prior notice. Specifications-2 • The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. Specifications Item Specification Model Name N-0531S-OD N-0531S Type Installation Indoor/ Outdoor, Wall Mounted Outdoor, Wall Mounted Power Vented Air Supply/Exhaust...
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Questions and answers
Our Noritz N-0631S-OD tankless water heater stopped working during a very cold snap. The unit is flashing three times. We reset the unit as recommended but it is still flashing three times.
The manual states that when an error code appears, the display and operation light will flash together. If the Noritz N-0631S-OD tankless water heater is flashing three times, it indicates an ignition error. To resolve this:
1. Check whether the gas valve is open.
2. Press the power button to turn the unit off.
3. Open a hot water fixture and turn the unit back on.
4. If the flashing stops, the problem is resolved.
If the issue persists, further troubleshooting or professional assistance may be required.
This answer is automatically generated