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General| Category | Tankless Water Heater |
|---|---|
| Type | Condensing |
| Fuel Type | Natural Gas or Propane |
| Max. Output BTU | 180, 000 BTU/h |
| Energy Factor (EF) | 0.96 |
| Water Connection | 3/4" NPT |
| Gas Connection | 3/4" NPT |
| Heat Exchanger | Stainless Steel |
| Electrical Requirements | 120V, 60Hz |
| Efficiency | 96% |
| Venting | 2" PVC/CPVC or 3" Concentric |
Outlines warranty periods for heat exchangers and other components.
Lists conditions and circumstances that void the product warranty.
Defines safety terms and hazard levels to ensure user understanding.
Identifies and explains the safety alert symbols used throughout the manual.
Explains symbols used to highlight important information and warnings.
Provides general safety guidelines to prevent injury, death, or property damage.
Provides performance and physical data for various Navien models.
Visual representation of the water heater's internal system operation.
Step-by-step process illustrating the unit's operational sequence.
Identifies key test points on the PCB for electrical diagnostics.
Comprehensive list of error codes, their reasons, and self-diagnostic actions.
Troubleshooting steps for errors related to heat exchanger boiling.
Troubleshooting steps for ignition failure errors.
Troubleshooting for errors caused by short-circuited hot water temperature sensors.
Troubleshooting for errors related to incorrect fan motor RPM.
Troubleshooting for errors related to the air pressure sensor or hose.
Troubleshooting for errors indicating loss of flame during combustion.
Troubleshooting steps for internal PCB (MICOM) errors.
Troubleshooting for errors related to the overheat controller (bimetal).
Troubleshooting for open heat exchanger input temperature sensors.
Troubleshooting for short-circuited heat exchanger input temperature sensors.
Troubleshooting for errors related to the air volume sensor.
Troubleshooting for errors due to high exhaust gas temperature.
Troubleshooting for open cold water temperature sensors.
Troubleshooting for short-circuited cold water temperature sensors.
Troubleshooting for errors related to the water adjustment valve.
Troubleshooting for errors related to the gas pressure sensor.
Troubleshooting for communication errors in cascade systems.
Troubleshooting for errors indicating an internal water leak.
Troubleshooting for errors related to pump operation or flow sensing.
Troubleshooting for errors related to the flow sensor in cascade systems.
Troubleshooting for errors in temperature sensor connections.
Troubleshooting for errors related to the bypass mixing valve.
Troubleshooting for errors related to low gas pressure on LP models.
Procedures for measuring and adjusting gas pressure and air ratio.
