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12 About the Boiler
Terminal Block
Dual Venturi
Fan & Motor Assembly
Igniter Transformer
Fire-Tube Type
Heat Exchanger
APS
Power Switch
Mixing Valve
3-Way Valve
Heating Return
Gas Valve
ASME Name Plate
Mixing Chamber
Intake Air Filter
Flame Rod
Igniter
Circulation Pump
Water Adjust Valve
DHW Exchanger
Water Fill Valve
Heating Supply
DHW Inlet
DHW Outlet
Condensate Trap
(Siphon)
PCB
Front Panel
Gas Pipe
Air Intake Pipe
Summary of Contents for NFC-250/175H
Page 67: ...67 Venting for Combustion Air WARNING The vent installation detector Detectable Undetectable...
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