To Next PageTo Next PageWhat to do if there is detection of scale build-up in the heat exchanger of my Noritz NR501 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 NR501?
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 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 NR501?
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 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 NR501 Water Heater 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 NR501 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| Fuel Type | Natural Gas or Propane |
|---|---|
| Heating Capacity | Up to 199, 900 BTU/h |
| Maximum BTU Input | 199, 900 BTU/h |
| Minimum BTU Input | 15, 000 BTU/h |
| Voltage | 120 VAC |
| Frequency | 60 Hz |
| Heat Exchanger Material | Copper |
| Temperature Range | 100°F - 140°F |
| Type | Tankless Water Heater |
| Weight | Varies by model |
| Vent Type | Direct Vent |
| Category | Residential |
| Gas Type | Natural Gas or Propane |
| Input BTU/h | 199, 900 BTU/h |
| Efficiency | 82% |
| Warranty | 12 years heat exchanger, 5 years parts |
| Inlet/Outlet Connection Size | 3/4 inch |
| Gas Connection Size | 3/4 inch |
