Navien NPE-240A Service Manual

Troubleshooting 109
1. Drain water from the unit, then remove the 4 screws and
retaining clips from the flow sensor.
2. Detach the 2 wire connectors that connect the flow sensor to
the PCB.
3. Blow air through the flow sensor. Check that the impeller
rotates freely.

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