Navien NFB Series - Components

9About the Boiler
1.4 Components
The following diagram shows the key components of the boiler. Component assembly diagrams and particular parts lists are included in the
Appendixes.
Intake Air
Air Intake Pipe
Exhaust
Fan & Motor Assembly
Dual Venturi
APS
PCB
Power Switch
Air Vent Connection
Gas Pipe
Mixing Chamber
Igniter
Flame Rod
Fire-Tube Type
Heat Exchanger
ASME Name Plate
Front Panel
24 V Power Transformer
Gas Valve
Condensate Outlet
Gas Inlet
Condensate Trap
(Siphon)