Specifications

Heated Flame Ionization Detector Analyzer Module
Rosemount Analytical NGA 2000
748414-A
August 1999
53
MAINTENANCE AND TROUBLESHOOTING
4
F
UEL
S
ENSOR
1. Disconnect wiring connector, note location.
2. Using an open-end wrench to hold the sensor fitting while using another open-end
wrench to remove the sensor.
3. Replace the Teflon pipe thread tape on the treads of the sensor fitting.
4. Install sensor onto sensor fitting.
5. Re-connect wiring connector.
B
URNER
A
IR AND
F
UEL
R
EGULATORS
1. Disconnect the two tubes and the sensor fitting on the rear of the regulator, note
locations.
2. Replace the Teflon pipe thread tape on the threads of the sensor fitting.
3. Remove the regulator and o-ring.
4. The replacement regulator comes with two panel mounting nuts, remove both and
discard one of them.
5. Inspect o-ring for damage, replace if necessary. Install o-ring onto regulator threaded
shaft.
6. Insert regulator into front panel, secure with mounting nut.
7. Re-attach the three tubes.
P
URGE
A
IR
R
EGULATOR
1. Remove the regulator mounting nut, remove mounting bracket.
2. Loosen nut on tee fitting attached to purge air flow switch.
3. Disconnect tube at elbow, remove regulator.
4. Remove the two plugs, elbow and male adapter fittings from the regulator.
5. Replace the Teflon pipe thread tape on the two plugs, the elbow and the male adapter
and install into replacement regulator.
6. Connect tube to elbow, insert male adapter into tee fitting.
7. Install mounting bracket onto regulator, hand snug mounting nut.
8. Attach mounting bracket to front panel, tighten regulator mounting nut.