To Next PageTo Next PageWhat to do if there is detection of scale build-up in the heat exchanger of my Noritz Water Heater?
If there is a detection of scale build-up in the heat exchanger of your Noritz Water Heater, you need to flush the heat exchanger to remove the scale build-up.
How to fix an ignition error on my Noritz NR662-OD?
If your Noritz Water Heater shows an ignition error, check if the gas valve is open. Then, try these steps: Unplug the unit or use the power button on the remote to turn it off. Open a hot water fixture, and then turn the unit back on. If the error disappears, the problem is resolved.
What to do if water is cold when only a single fixture is open on my Noritz NR662-OD Water Heater?
If the water from your Noritz Water Heater is cold when only one fixture is open, increase the water flow by opening the fixture more or by opening additional fixtures. This ensures enough water passes through the unit for it to begin heating.
Why doesn't the power button light come on for my Noritz Water Heater?
If the power button light on your Noritz Water Heater doesn't come on, check if there has been a power failure and ensure the unit is properly connected to a power source.
Why does my Noritz NR662-OD Water Heater stop burning during operation?
If your Noritz Water Heater stops burning during operation, check that both the gas and water supply valves are fully open.
What to do if my Noritz NR662-OD is locked due to repeated Scale Build-up error codes?
If your Noritz Water Heater unit is locked due to repeated scale build-up error codes, you must flush the heat exchanger to remove the scale build-up.
Why doesn't my Noritz NR662-OD Water Heater fire when water is flowing due to high supply water temperature?
Your Noritz Water Heater will not fire if the supply water temperature is too high, as the unit will overheat the outlet water.
General| Type | Tankless Water Heater |
|---|---|
| Weight | 38 lbs |
| Fuel Type | Natural Gas |
| Temperature Range | 100°F - 140°F |
| Gas Type | Natural Gas |
| GPM @ 35°F Rise | 6.6 GPM |
| Flow Rate (GPM) | 6.6 |
| Warranty | 12 years heat exchanger, 5 years parts |
Explains the meaning of DANGER, WARNING, and CAUTION symbols and their associated risks.
Warns against storing or using flammable products near the water heater.
Alerts to the severe burn risk from water exceeding 125°F (52°C).
Prohibits indoor installation due to carbon monoxide poisoning risk.
Details risks associated with gas leaks and improper valve operation.
Specifies minimum safe clearances around the exhaust vent terminal.
Warns against placing combustibles or using chemicals near the unit.
States that installation and service must be performed by qualified professionals.
Covers grounding, power cord handling, and avoiding wet hands.
Guides on safely performing maintenance, including turning off power and cooling.
Advises on measures to prevent damage from freezing.
Illustrates and labels the main external parts of the water heater.
Explains how the display indicates unit status, temperature, and error codes.
Details the four essential steps for preparing the water heater for its first use.
Covers checking power, turning on hot water, mixing, and turning off.
Warns about the severe burn risk from water over 125°F (52°C).
Introduces the remote controller and its main indicators and buttons.
Guides on powering on and setting the desired water temperature using the remote.
Explains how to set the upper limit for hot water temperature via the remote.
Details how to set and use the flow meter alarm for filling tasks.
Describes how to disable audible feedback from the remote controller.
Explains the unit's built-in freeze protection and its operational limits.
Details necessary actions for protecting the unit in extremely cold conditions.
Provides instructions on how to drain the unit if it will be unused for an extended period.
Lists visual checks and functional tests recommended for regular inspection.
Advises on cleaning the exterior surfaces of the water heater.
Details the process for cleaning the filter in the water drain valve.
Explains the necessity of flushing due to hard water and potential scale build-up.
Lists acceptable water quality parameters to ensure proper operation and warranty coverage.
Lists common error codes, their causes, and recommended corrective actions.
Addresses issues like ignition failure and incorrect temperatures during initial setup.
Covers issues with water being too hot, not hot enough, or experiencing fluctuations.
Discusses problems with inconsistent hot water amounts or reduced availability.
Explains normal operational sounds and other miscellaneous problems.
Guides on how to request service and provides information on warranty.
Details the process and requirements for converting the unit to a different gas type.
Lists technical details, dimensions, and safety devices for the NR662-OD model.
Lists technical details, dimensions, and safety devices for the NR501-OD model.
