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4. Install the new cryo assembly over the inlet
body. Be sure to align the assembly so that
the fitting is closest to the wires, as shown
in Figure 1-34.
5. Reassemble in reverse order.
6. Check for leaks.
Replacing the PTV module assembly
The PTV module assembly is available as a
replacement part with or without the connected
plumbing. When replacing just the module, the
plumbing is removed at the module outlet block.
When replacing the plumbing and module, the
plumbing is disconnected from the inlet.
Released: April 2004
NOTE: When installing a new PTV module assem-
bly and plumbing, it is not necessary or recom-
mended to disconnect the plumbing from the
module. The system is leak tested at the factory.
1. Turn off the oven and the inlet and allow
2. Remove the top cover, the inlet fan cover,
3. Remove the column.
6850 Series Gas Chromatograph Service Procedures
Caution
Follow ESD precautions when performing
this procedure.
them to cool. Turn off all flows at the initial
gas supply. Then turn off the main power
switch and unplug the power cord.
the inlet cover, the left side panel, the top
rear panel, the pneumatics chassis cover,
and the RFI cover.
97
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