Damper For Prevent A Head Wind

2Nd H/E Inlet Pipe Sts Ncb210

Control Board

DHW FLOW SENSOR KDC-FSAB

Gas Pipe Assy Ncb210/240

NAVIEN FLAME ROD

AUTO FEED V/V ASM NCB

Water Fill Pipe Ncb

Primary H/E Out Adp Pre 5/9/15