PGC5007
PGC5007 Operating Instructions 5 Furnace repair
29 OI/PGC5007-EN, Rev C
5. Withdraw the thermocouple 1/32 inch (maximum) from the furnace tube. It must be very close to the tube without
actually touching the furnace tube.
6. Hold the thermocouple in place and tighten the tube nut finger tight.
7. Place one wrench on the 1/8-inch fitting and a second wrench (backup wrench) on the 3/16-inch tube fitting, and tighten
the tube fitting 1/4-turn. The tube nut should be just tight enough to ensure the thermocouple cannot move. It does not
have to be a gas-tight fitting.
8. Verify that the thermocouple cannot move in the fitting.
9. Slide the insulating tubes over the thermocouple wires.
10. Restore the thermocouple wires to their original connections on the terminal block.
11. Verify that the thermocouple wires are not shorted to each other.
12. If this completes the furnace work, install the furnace cover as described in "Installing the Furnace Cover."
5.9 Installing the furnace cover
1. Verify that the internal heat shield is in place.
2. Apply low-sodium lubricant ABB P/N 3617948-1 to all 40 cover bolts.
3. Place the cover onto the housing.
4. Install the 40 cover bolts and torque all cover bolts to 16 in-lbs.
5. If the column was moved, restore it to its original position and install and tighten the two mounting screws.
6. If the diaphragm valves are on a slider, move them back to their original location and tighten the thumbscrews.
7. Install the isothermal oven door on its hinges.
8. Close the isothermal oven door.
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