Emerson Process Management 760004-A - Manual (Page 39)

Instruction Manual
760004-A
February 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 4-1
Model NGA 2000 HFID
Cover
Insulation Shield
Securing
Screw (4)
Cover/Rear Panel Secur-
ing Screws (6)
ATTE NTION
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 SERVICE
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 module to
cool.
2. Refer to Figure 4-1. 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 in-
ner insulation shield to base, lift up to re-
move.
Figure 4-2 illustrates the locations of major
components of the HFID.
Figure 4-1. Removal of Cover and Insulation Shield