Emerson Process Management 760004-A !WARNING, ATTENTION, 760004-AFebruary, Figure 2-1.Back Panel Connections, Purge air and burner air should be supplied from separate sources

Instruction Manual

760004-A February 2002

Model NGA 2000 HFID

graph-grade tubing. Thoroughly clean before use (if a hydrocarbon-based cleaning solvent such as acetone is used, purge tubing with dry nitrogen or helium for several minutes before using.)

Gas line connections are compression fittings. Do not use pipe thread tape.

Since the oxidation of hydrogen is accompanied by the formation of water vapor, the Exhaust tubing always should be slanted downward at least 6 degrees from horizontal. Otherwise, water may accumulate in the line, causing back pressure and noisy readings, or may back up in

the line and flood the burner. Depending on the percent of water vapor in the sample, the sample bypass out connection may have condensation. Proper drainage may be required.

If the sample is toxic or noxious, or is to be reclaimed, connect the Bypass outlet to a suitable disposal system. Do not use any device that may cause back pressure in the line.

Purge air and burner air should be supplied from separate sources.

! WARNING

Possible electric shock, explosion or toxic gas hazard. See front of module

PURGE	BURNER
AIR OUT	AIR IN

REGULATE PURGE

D AIR IN

BURNER

EXHAUST

OUT

VENT TO SAFE AREA

SLOPE DOWNWARD 6°

MINIMUM

WARNING

HOT !

ATTENTION

CHAUD !

HEATED

SAMPLE IN

HEATED

SAMPLE BYPASS OUT

FUEL

IN

MAXIMUM

INPUT

PRESSURE

FUEL: 50 psig(3445 hPa)

BURNER AIR: 50 psig (3445 hPa)

SAMPLE: 8 psig (551 hPa)

PURGE AIR: 20 psig (1378 hPa)

REG AIR: 25 psig (1722 hPa)

PRESSURE

RELIEF

VALVE

! ATTENTION

Danger d'electrocution, d'explosion ou d'emanation de gaz toxique. Se refere aux details inscrits surla face du module.

Figure 2-1. Back Panel Connections

2-2 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management