Chapter 4 33
Installation
3. Place a paper towel or tissue paper on the floor of the GC oven. From inside
the oven, cut away the insulation covering the front valve port (see Figure
4.5). The front valve port will align with the hole on the PFPD valve box
mounting plate (Part #296350). After cutting away the insulation, carefully
remove all the insulation material debris and the paper towel.
4. Cut a hole approximately 1" (25 mm) in diameter in the previously removed
insulation layer in such a way that the center of the hole lines up with the
center of the previously cut detector port hole. Replace the insulation cutout.
Figure 4.4. Valve Box Plate
Valve Box
Heater Sensor Connector
Front Valve Port
Figure 4.5. Inside of HP 6890 GC Oven
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