Closed-loop programming and control of a combustion appliance

An auto-programming control system for a combustion burner having a plurality of burner firing rates, comprising:

• a controller configured to control an air-fuel ratio of a fluid flow to the combustion burner;
• a memory in communication with the controller;
• and
• wherein the controller is configured to fire the combustion burner at each of the plurality of burner firing rates, and at each of the plurality of burner firing rates the controller is configured to:
• set an air-fuel setting;
• receive a measure of a combustion constituent exiting the combustion chamber at the air-fuel setting;
• determine a difference between the measure of the combustion constituent exiting the combustion chamber and a set point;
• and
• adjust the air-fuel setting until the difference between the measure of the combustion constituent exiting the combustion chamber and the set point is below a threshold, and then save an association between the air-fuel setting and the corresponding one of the plurality of burner firing rates to the memory;
• and
• move to a next burner firing rate of the plurality of burner firing rates and repeat.

A valve for supplying a fuel flow to a combustion chamber, wherein a fan provides an air flow to the combustion chamber, the valve comprising:

• a housing that houses one or more valves;
• a controller housed by the housing, the controller configured to control an air-fuel ratio of a fluid flow to the combustion chamber by at least adjusting the position of one or more of the valves in order to adjust the fuel flow to the combustion chamber;
• wherein the controller is configured to:
• identify a measure of a combustion constituent exiting the combustion chamber;
• compare the measure of the combustion constituent exiting the combustion chamber to a set point;
• and
• control the air-fuel ratio of the fluid flow to the combustion chamber at least by adjusting the position of one or more of the valves in order to adjust the fuel flow to the combustion chamber.