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Instruction Manual
748297-E
June 2003
Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Troubleshooting 4-1
Model NGA2000 HFID
Cover
Insulation Shield
Securing
Screw (4)
Cover/Rear Panel
Securing Screws (6)
PURGE AIR OUT
WARNING
WARNING
ATTENTION
BURNER AIR IN
REGULATED AIR IN
PURGE AIR IN
HEATED SAMPLE BYPASS
HEATED SAMPLE IN
BURNER EXHAUST OUT
FUEL IN
PRESSURE RELIEF VALVE
Front Panel Securing
Screws (6)
SECTION 4
MAINTENANCE AND TROUBLESHOOTING
WARNING
QUALIFIED PERSONNEL
This equipment should not be adjusted or
repaired by anyone except properly quali-
fied service personnel.
4-1 OVERVIEW
This section contains instructions and proce-
dures for troubleshooting and maintaining the
HFID analyzer module. To access the inter-
nal components of the analyzer module, per-
form the following:
1. Remove power to the unit; shut off
gases and disconnect lines. Allow mod-
ule to cool.
2. Refer to Figure 4-1 below. Remove the
six screws securing the front panel, then
the six screws securing the cover to the
rear panel. Slide cover towards rear
panel to remove. Loosen four screws
securing inner insulation shield to base,
lift up to remove.
Figure 4-2 on page 4-2 illustrates the loca-
tions of major components of the HFID.
Figure 4-1. Removal of Cover and Insulation Shield