Navien NPE-240A Operation Manual

2 Contents
Contents
1. Safety Information 3
2. About the Water Heater 6
2.1 Description of the Water Heater 6
2.2 Parts of the Water Heater 6
2.3 The Front Panel 7
3. Operating the Water Heater 8
3.1 Turning the Water Heater On or Off 8
3.2 Adjusting the Water Temperature 8
3.3 Viewing Basic Information 9
3.4 Resetting the Water Heater 9
4. Maintaining the Water Heater 10
4.1 Cleaning the Water Heater 10
4.2 Draining the Water Heater 10
4.3 Flushing the Heat Exchanger 11
4.4 Cleaning the Inlet Water Filter and Recirculation Inlet Filter
12
4.5 Cleaning the Air Intake Filter 13
4.6 Protecting the Water Heater from Freezing 14
5. Troubleshooting 15
5.1 Solving Basic Problems 15
5.2 Understanding Error Codes 16

Navien NPE-240A Specifications

General

Type	Tankless
Fuel Type	Natural Gas or Propane
Energy Factor	0.97
Energy Efficiency	97%
Voltage	120V
Ignition Type	Electronic
Maximum Input	199, 900 BTU/h
Water Connection Size	3/4"
Gas Connection Size	3/4"
Warranty	15-year on heat exchangers, 5-year on parts, 1-year on labor
Dimensions	17.3" W x 13.2" D x 27.4" H