Mr. Lieberman, According to your book, “Troubleshooting Process Operations,” the correct place to locate an O2 analyzer is just below the bottom row of convective tubes. Is this correct?
Tony – Best to adjust excess air to max heater outlet °F, or to minimize fuel use. On this basis, an O2 analyzer is not needed to control air. Then, if an analyzer is used, locate it above the convective box to help monitor tramp air leaks in the convective box.