Navien NPE-240A Service Manual

Version 2.21
66 NPE Service Manual
4.11.9 Burner
Part Check Point
Function
1. Pre-Mix system reduces emissions and increase efficiency.
2. The burner facilitates the air/gas mixture necessary to produce the proper heat during combustion.
Failure Event
1. Unable to initialize/sustain combustion.
2. Dust or soot deposit on the burner surface
3. Possible gas leakage from burners.
Effects
1. Abnormal combustion.
2. Unstable flame conditions and/or flame loss.
3. Ignition failure.
Error Code E003, E004, E012
Diagnostic Visual inspection: Excessive deposits on the burner surface and/or unstable flame conditions during operation.
Color/Number
of wires
N/A
Fuel Gas Supply
Combustion Air Supply
Burner Body
(Fuel Gas +
Combustion Air Mix Zone)

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