Instruction Manual

748297-E June 2003

Model NGA2000 HFID

All new external gas tubing (except for PURGE IN/OUT and SAMPLE BYPASS) is strongly recommended, preferably pre- cleaned, stainless steel, gas chromatograph -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 fit- tings. 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 horizon-

tal. 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 sam- ple, 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

PURGE

BURNER

AIR OUT

AIR IN

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

 

FUEL

BURNER

IN

EXHAUST

MAXIMUM

OUT

INPUT

VENT TO SAFE AREA

PRESSURE

SLOPE DOWNWARD 6!

FUEL: 50 psig(3445 hPa)

MINIMUM

BURNER AIR: 50 psig (3445 hPa)

WARNING

SAMPLE: 8 psig (551 hPa)

PURGE AIR: 20 psig (1378 hPa)

HOT !

REG AIR: 25 psig (1722 hPa)

REGULATE

PURGE

ATTENTION

PRESSURE

CHAUD !

D

AIR IN

 

RELIEF

 

VALVE

 

 

 

 

 

 

HEATED

 

 

 

SAMPLE IN

HEATED

SAMPLE

BYPASS OUT

!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

Installation

Rosemount Analytical Inc. A Division of Emerson Process Management