Replacing The Plumbing Assemblies - Agilent Technologies 6890 Series Service Manual

3. Lift the filter trap from the LCO2 bracket and then slide the manifold
assembly out of the chassis.
4. Replace the manifold assembly and plumbing and reassemble in reverse
order.
5. Check the system for leaks.
Removing the PTV manifold only
1. Remove the plumbing block from the front of the manifold by removing
the screws.
2. Inspect the O-rings in the block for damage and replace if necessary.
3. Slide the manifold from the chassis and replace.
4. Installation is the reverse of removal.
5. Check the system for leaks.

Replacing the plumbing assemblies

1. Turn off the oven and the inlet and allow them to cool.
WARNING Turn off the oven and the inlet and allow them to cool. Turn off all flows at
the initial gas supply. Then turn off the main power switch and unplug the
power cord.
2. Remove the top cover, the inlet fan cover, the inlet cover, the top rear
panel, and the pneumatics chassis cover.
3. Remove the column.
4. Loosen the three captive Torx screws which secure the inlet to the oven,
and lift the PTV inlet out of the oven.
5. To replace the PTV gang weldment, disconnect the plumbing block from
the PTV manifold assembly. Then, disconnect the carrier gas line and the
septum purge line (septum head only) from the inlet. Unscrew the filter
trap assembly and remove the PTV gang weldment assembly.
Jun 2001
Programmed Temperature Vaporization Inlet (PTV)
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Replacement procedures
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