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Instruction Manual
748297-E
June 2003
4-22 Maintenance and Troubleshooting Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA2000 HFID
LED Indicator Assembly
657029
Purge Air Flow
Switch 656533
Burner Air Regulator
902832
Burner Air Sensor
656443
Air Ignite Restrictor
655794
Manual Ignite
Toggle Switch
657053
Purge Air Regulator
871672
Burner Air Solenoid Valve
656219
Fuel Regulator
902832
Fuel Sensor
656444
Air Measurement
Restrictor 656888
O-Ring
011167
Toggle Switch Seal
898980
O-Ring
010177
O-Rings
008025
Diffuser
657548
LON/Power Module
656560
Connector
fitting
Regulator Mounting Nut
Regulator Mounting Bracket
Plugs
Male Adapter
Fitting
Sensor Fittings
657412
i. Front Panel Components
The following components are mounted to
the front panel:
LON/Power Module
Manual Ignite Toggle Switch
LED Indicator Assembly
Purge Air Regulator
Purge Air Flow Switch
Burner Air Solenoid Valve
Burner Air Regulator
Fuel Regulator
Burner Air Sensor
Fuel Sensor
Air Ignite Restrictor
Air Measurement Restrictor
Figure 4-20. Front Panel – Exploded View