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9
About 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
Vent Installation
Detector
Exhaust Duct
Fan & Motor
Assembly
Dual Venturi
APS
PCB
Power Switch
Air Vent Connection
Gas Pipe
Mixing Chamber
Igniter
Flame Rod
Fire-Tube Type
Heat Exchanger
Igniter Transformer
ASME Name Plate
Front Panel
24 V Power
Transformer
LWCO
(Pressure Sensor)
Gas Valve
Condensate Outlet
Gas Inlet
Condensate Trap
(Siphon)
Summary of Contents for NFB-175H
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