Procedure - Reinstalling The Detector - Siemens Maxum II Service Manual

Flame Ionization Detector
4.4 Replacing the FID Igniter
16.Insert the purge filter (A5E41381855001) through the washer (A5E41849023), and screw
into the bushing to secure the purge tube.
17.If the new grommets are not installed in the holes on the new EC cover plate or on the
purge tubes, then install them now.
18.Apply a coating of Krytox 240 AC or similar lubricant around the inside diameter of the
grommets to allow for easy sliding of the new purge tube.
19.Feed the detector wiring through the appropriate holes on the new EC cover plate and
install the cover plate onto the detector assembly.
4.4.4

Procedure - Reinstalling the Detector

1. Inspect the FID EC cover plate gasket (2021171-001) and replace if worn or damaged.
2. Inspect the FID thermal gasket (2021263-001) and replace if damaged. Retrieve any gasket
fragments that may have remained in or on top of the oven. If replacing the gasket, clean
the mating surface on the FID, and remove the paper backing to expose the adhesive.
Gasket installed on FID lower body
Figure 4-15
3. Route the FID Module Assembly wiring into the EC and install the module into the analyzer.
Make sure that the FID bottom body fits into the hole at the bottom of the mezzanine section.
4. Install the 4 M4 screws into the FID mounting plate and tighten using a 2.5mm Allen wrench.
5. Make sure that the EC cover plate gasket is in the correct position and install the 4 M4 nuts.
Tighten the nuts using a 7mm nut driver. Verify that the nuts are not over-tightened by
making sure that the gasket is not pushed out more than about 1/16" along the edges of
the EC cover plate.
6. Connect the utility gas lines to the correct connecting unions and tighten using a 5/16" open-
end wrench. Remove the temporary labeling that was added earlier in this procedure.
7. Place the insulation and then the FID cover onto the FID block.
46
Adhesive
FID Thermal Gasket
To oven fitting
Service Manual, May 2018, A5E42019847001
Maxum Edition II Detectors