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Jun 2001
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Split/Splitless Inlet 210
Replacement procedures
7. Remove the 1/8-inch Swagelok nut using a 7/16-inch open end wrench.
8. Use a Torx T-20 screwdriver to loosen the three captive screws that attach
the inlet weldment plate to the top of the inlet carrier.
9. Pull the inlet up out of the inlet carrier. If necessary, you can also slide
the insulation sleeve off of the bottom of the inlet.
Top insert assembly replacement
1. The top insert assembly is replaced as one assembly if required.
For EPC inlets:
a. Disconnect the pneumatics block from the front of the EPC module
(one Torx T-10 screw). Be careful not to lose the three O-rings from
the pneumatics module.
b. Follow the split vent flow line back from the pneumatics block and
disconnect the line from the split vent trap.
c. Remove the carrier and septum purge lines from the left side of the
GC.
For non-EPC inlets:
a. Unscrew the top insert assembly (large inlet nut and flow lines on
the top of the inlet) that has the carrier gas and septum purge lines
plumbed to it. Raise this assembly up and away from the inlet.
b. Follow the split vent flow line back from the pneumatics block
attached to the top insert assembly and disconnect the line from the
split vent trap.
c. Remove the carrier and septum purge lines from under the plastic
tabs on the left side of the GC.
2. Use a 7/16-inch wrench to unscrew the split vent flow line nut from the
Swagelok fitting at the top of the inlet.
3. Use a Torx T-20 screwdriver to loosen the three captive screws that attach
the inlet weldment plate to the top of the inlet carrier.
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