Specifications

Heated Flame Ionization Detector Analyzer Module
Rosemount Analytical NGA 2000
748414-A
August 1999
35
MAINTENANCE AND TROUBLESHOOTING
4
Burner Cap
Burner Cap
Retainer
Gasket
656931
Burner Base
Burner Base
Combustion
Chamber
A
B
O-Ring
904373
4.2.3.2 R
EPLACING
B
URNER
J
ETS
Disassemble the burner only if contaminants are evident. Combustion products or other
contaminates which accumulate inside the burner may form electrical leakage paths
between the collector and the burner contact, resulting in noisy readings.
If the analyzer module is to be operated at the highest sensitivity, traces of such
contaminates can cause erroneous readings. For best performance, replace the burner jet
follows:
WARNING: BURNER CONTAMINATION
Do not handle internal parts of the burner with bare hands. All tools used for
maintenance must be free of contaminates.
1. Remove oven from analyzer module per Section 4.2.1.1.
2. Remove burner/thermal block from oven per 4.2.1.2.
3. Remove thermal block from burner per Section 4.2.3.1.
4. Refer to Figure 4-7A. Remove screws (2) holding burner cap retainer, remove retainer.
5. Holding burner base, lift burner cap off of assembly, set aside, remove gasket.
6. Refer to Figure 4-7B. Holding burner base, lift combustion chamber off, set aside.
F
IGURE
4-7. B
URNER
D
ISASSEMBLY