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780P-9.1
4. Install the spark plugs in the Pyramid Bracket cover, rotate the plugs until the tips of the
electrodes are centered and 7/16" apart (see Figure 2), and then tighten the holding nuts
securely.
Figure 2.
5. Place the plug cover on the Pyramid Bracket. The ends of the electrodes should be approx-
imately distance "D" above the center of the burner nozzle. If "D" is not correct, remove the
spark plug cover and adjust the electrodes as required. When "D" is correct the electrode tips
are just within the edge of the air and oil stream when the burner is in the low fire position.
Figure 3.
Burner No.
D
E
779 5/16"
2-3/4"
780 1’2"
2-3/8"
781 11/16"
2-1/2"
782 7/8"
2-1/2"
783 1-1/16"
2-5/8"
784 1-1/2"
2-5/8"
785 1-1/2"
2-5/8"
