Heating furnace using discharge air heating control mode

A heating control device comprising:

• input/output (I/O) ports configured to transmit and receive electrical signals;
• a memory operable to store a temperature map that maps temperatures to speeds of an air circulation fan;
• and
• a microprocessor operably coupled to the I/O ports and the memory, and configured to:
• transmit a first electrical signal to operate the air circulation fan at a first speed and a heating unit in a first configuration with at least one active burner from a plurality of burners within a gas manifold to achieve a first temperature, wherein:
• a first set of burners from the plurality of burners are disposed within a first segment of the gas manifold;
• a second set of burners from the plurality of burners are disposed within a second segment of the gas manifold;
• gas communication is disallowed between the first segment and the second segment of the gas manifold;
• and
• less than all of the burners are active when the heating unit is in the first configuration;
• receive a temperature set point;
• determine a second speed for the air circulation fan using the temperature set point and the temperature map in response to receiving the temperature set point;
• transmit a second electrical signal to transition the air circulation fan from the first speed to the second speed in response to determining the second speed;
• and
• determine a second configuration using the temperature set point and the temperature map,
• wherein:
• the temperature map maps temperatures to configurations for the heating unit.

A heating control method comprising:

• operating, by a microprocessor, an air circulation fan at a first speed and a heating unit in a first configuration with at least one active burner from a plurality of burners within a gas manifold to achieve a first temperature, wherein:
• a first set of burners from the plurality of burners are disposed within a first segment of the gas manifold;
• a second set of burners from the plurality of burners are disposed within a second segment of the gas manifold;
• gas communication is disallowed between the first segment and the second segment of the gas manifold;
• and
• less than all of the burners are active when the heating unit is in the first configuration;
• receiving, at the microprocessor, a temperature set point;
• determining, at the microprocessor, a second speed for the air circulation fan using the temperature set point and a temperature map that maps temperatures to speeds of the air circulation fan;
• transitioning, by the microprocessor, the air circulation fan from the first speed to the second speed in response to determining the second speed;
• and
• determining, at the microprocessor, a second configuration using the temperature set point and the temperature map,
• wherein the temperature map maps temperatures to configurations for the heating unit.