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Plumbing the Purge Gas
Plumbing the Purge Gas
Hydrogen is both a fire and explosion hazard when mixed with air. For this reason,
WA R N I N G
hydrogen must not be used as the purge gas.
For new systems, plumbing is best done by ordering Option 885. The factory
will then make the correct purge gas line installation.
If you prefer to do the installation yourself, or if you are retrofitting
QuickSwap to an existing system, see the following instructions.
Use extreme care to avoid contaminating the purge gas line with oven
insulation during the installation.
In either case, the purge gas line must be in place before you start the
QuickSwap installation.
6850 Series II GC
To install the purge gas line:
Cool the column oven, inlet, and MSD transfer line before starting. They may be hot
WA R N I N G
enough to cause burns.
1 Cool the GC oven and turn the power off.
2 If necessary, mount the G3349B Auxiliary EPC on the back of the GC using
3 Confirm that Channel #5 of the EPC has an output restrictor with a brown
4 Connect the purge gas supply and check for leaks.
6
the instructions provided with the kit.
dot or line. If not, replace it with the FID Air flow restrictor (part number
19231-60610) from the Aux EPC supplies kit.
QuickSwap Installation and Startup
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