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Instruction Manual
748297-E
June 2003
Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
1-6
Model NGA2000 HFID
d. Gas Connections
Sample In ...................................... 1/4" O.D. tube fitting, stainless steel
Regulated Air In ...............................1/4" O.D. tube fitting, brass
Burner Air In .....................................1/4" O.D. tube fitting, brass
Fuel In...............................................1/4" O.D. tube fitting, stainless steel
Purge Air In ......................................3/8" O.D. tube fitting, brass
Purge Air Out....................................3/8" O.D. tube fitting, brass
Bypass Out.......................................1/4" O.D. tube fitting, stainless steel
Burner Exhaust Out .........................3/8" O.D. tube connection, stainless steel (must slope downward
6
o
min. from horizontal)
Note
Burner Exhaust, Bypass Out and Purge Air Out to be vented to atmospheric pressure and to non-
classified location in accordance with ANSI/NFPA-496 guideline
Pressure Relief Valve.................... See Caution below
CAUTION
PRESSURE RELIEF VALVE
No connection shall be made to this fitting. If this caution is ignored, damage to the case seals
could occur, and the instrument will not operate properly
WARNING
HIGH TEMPERATURE
The Sample In, Bypass Out, and Burner Exhaust Out connections can reach temperatures of up to
250°C (480°F). Severe burns could result from touching these connections.
See the Preface section of the Platform Components manual for specifications regarding Platform-
related components and the Preface of the I/O Module manual for specifications regarding I/O (e.g.,
relay outputs.