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General| Maximum Input | 199, 900 BTU/h |
|---|---|
| Energy Factor (UEF) | 0.96 |
| Voltage | 120 V |
| Temperature Range | 98°F - 140°F |
| Type | Tankless |
| Fuel Type | Natural Gas |
| Gas Connection | 3/4 inch NPT |
| Water Connection | 3/4 inch NPT |
| Ignition Type | Electronic |
| Venting | 2 inch PVC/CPVC |
| Warranty | 15 years heat exchanger, 5 years parts |
Defines safety terms and alerts used in the manual for hazard awareness.
Explains safety symbols and their meanings for hazard identification.
Lists critical safety measures to prevent hazards during operation and maintenance.
Navien offers NR and NP series, with "A" models including circulation pump.
Identifies and describes the main components and their layout for different models.
Provides overall technical specifications for various Navien models.
Details the physical dimensions of the water heater units.
Provides connection diameters and physical dimensions for NR-A and NP-A models.
Provides connection diameters and physical dimensions for NR and NP models.
Illustrates the internal workings and flow of water and gas within the unit.
Depicts the sequence of operations and decision points for the water heater.
Explains the function and configuration of DIP switches on the PCB.
Provides electrical wiring diagrams for different models for service.
Identifies key points on the PCB for electrical diagnostics and testing.
Describes major internal components, grouped by function.
Details PCB, fuses, transformers, sensors, and safety limit switches.
Describes fan motor, flame rod, gas/water valves, sensors, heat exchangers, and pumps.
Lists error codes, their reasons, and self-diagnostic/reset actions.
Details the conditions and checks for Error 01E (Boiling).
Details the conditions and checks for Error 03E (Ignition Fail).
Details the conditions and checks for Error 04E (False-flame Detection).
Details the conditions and checks for Error 10E (Air pressure error).
Guides troubleshooting based on symptoms like noise or hot water issues.
Outlines precautions and tools needed for conducting a water heater inspection.
Details procedures for checking inlet gas pressure.
Details procedures for adjusting the gas-air ratio.
Provides steps for draining water from the waterway and condensate.
Explains how to remove and clean the intake air filter.
Details the procedure for flushing the heat exchanger with a cleaning solution.
Outlines general procedures and cautions for replacing parts.
Step-by-step instructions for replacing key components like PCB, fuse, motor, etc.
Shows how to disassemble the unit's outer case.
Details the disassembly process for the burner assembly.
Illustrates water way disassembly for NR-A, NR, NP-A, and NP models.
Provides a checklist for recording inspection findings.
Provides a checklist for recording maintenance activities.
