Emerson ROSEMOUNT NGA2000 HFID Instruction Manual page 46

Instruction Manual
748297-E
June 2003
Replacing Burner Jets
Disassemble the burner only if contami-
nants 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 read-
ings.
If the analyzer module is to be operated at
the highest sensitivity, traces of such con-
taminates can cause erroneous readings.
For best performance, replace the burner
jet follows:
BURNER CONTAMINATION
Do not handle internal parts of the
burner with bare hands. All tools used
for maintenance must be free of con-
taminates.
A
Gasket
656931
4-8 Maintenance and Troubleshooting
WARNING
Burner Cap
Retainer
Burner Cap
Burner Base
Figure 4-7.
Model NGA2000 HFID
1. Remove oven from analyzer module
per Section 4-2a on page 4-3.
2. Remove burner/thermal block from
oven per 4-2b on page 4-4.
3. Remove thermal block from burner
per Section 4-2c on page 4-7.
4. Refer to Figure 4-7A below. Remove
screws (2) holding burner cap re-
tainer, remove retainer.
B
Burner Base
Burner Disassembly
Rosemount Analytical Inc.
Combustion
Chamber
O-Ring
904373
A Division of Emerson Process Management