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11. Inspect the O-rings and filter in the filter
trap, and replace if necessary.
12. If replacing the PTV gang weldment, install
new O-rings in the module plumbing block.
13. Replace the gang weldment or front trap
assembly and reassemble in reverse order.
14. Check the system for leaks.
Replacing a gang fitting restrictor or O-ring
1. Turn off the oven and the inlet and allow
them to cool.
Released: April 2004
2. Remove the top cover, the inlet fan cover,
3. Remove the screw in the gang fitting. Gently
4. Reassemble in reverse order and check the
6850 Series Gas Chromatograph Service Procedures
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.
the inlet cover, and the pneumatics chassis
cover.
tap the fitting to remove the restrictor for
cleaning/replacement. Inspect the O-rings
and replace if necessary.
plumbing for leaks.
103
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