Navien NHB-150 Service Manual

NHB Service Manual 65
Version 1.0
4.9 Key Components Description
4.9.1 PCB
Part Check Point
Function Controls each component and monitors the overall performance of the unit.
Failure Event Malfunctioning PCB.
Effects
A component may not operate within the unit and could produce an error code. In most cases of
PCB failure, the whole unit will not operate until the problem is resolved.
Error Code E515, E615
Diagnostic
Visual inspection: Check wire connections are secure and inspect for wire damage, and/or PCB heat
damage.
Color / Number of wires Refer to page 63-64

Navien NHB-150 Specifications

General

Model	NHB-150
Category	Boiler
Maximum Input	150, 000 BTU/h
AFUE	95%
Vent Type	Direct Vent
Fuel Type	Natural Gas or Propane
Min. Input (NG)	15, 000 BTU/h
Min. Input (LP)	15, 000 BTU/h
Voltage	120 V
Water Connection Size	1 inch NPT
Gas Connection Size	3/4 inch NPT
Vent Diameter	3"