Patent ID: 7469647

Claim:
A method for adjusting temperature levels within a boiler system, the boiler system having first, second, third, and fourth burners disposed therein, the method comprising: receiving first, second, third, and fourth signals from first, second, third, and fourth temperature sensors, respectively, disposed at substantially first, second, third, and fourth locations, respectively, in the boiler system between the first, second, third, and fourth burners, respectively, and an exit plane of the boiler system; determining first, second, third, and fourth temperature levels at the first, second, third and fourth locations, respectively, in the boiler system based on the first, second, third, and fourth signals, respectively; receiving fifth, sixth, seventh, and eighth signals from first, second, third, and fourth CO sensors, respectively, disposed at substantially the first, second, third, and fourth locations, respectively, in the boiler system; determining first, second, third and fourth CO levels at the first, second, third and fourth locations based on the fifth, sixth, seventh, and eighth signals, respectively; determining the first and second locations have first and second temperature levels, respectively, greater than a threshold temperature level and first and second CO levels, respectively, greater than a threshold CO level; determining the first and second burners in the boiler system are contributing to the first and second locations having the first and second temperature levels greater than the threshold temperature level and the first and second CO levels greater than the threshold CO level; and increasing an A/F ratio of at least one burner of the first and second burners, to decrease the first and second temperature levels at the first and second locations, respectively, toward the threshold temperature level and to decrease the first and second CO levels at the first and second locations, respectively, toward the threshold CO level.