This class is the complete 10 modules and includes a mid-term test and a comprehensive final exam.
Many basic principles of physics, chemistry, and engineering are involved in the concept of gas-fired forced-air furnaces.This module covers four of the eight "foundation blocks" including Heat; Molecules, Heat and Temperature; Heat Transfer; and Pressure.
This module is divided into the four remaining "foundation blocks," each covering an important principle about the combustion of gas. these include Gas Properties, Combustion Theory, Practical Combustion and Efficiency. The principles in these four foundation blocks are vital to your understanding the function and operation of the gas burners, gas ignition system, and vent and combustion air system in a gas furnace. Knowing these principles also will help service, maintain, and troubleshooting these devices.
This module is an introduction to gas-fired furnaces that will link basic principles of gas heating to an overview of furnace design, types, applications, and operation.
This module begins with a discussion of the theoretical principles of gas burners and the flame burners, the burner type most commonly used in gas-fired furnaces. Then it discusses actual burners, the functions of their components and their flame and combustion characteristics. the module ends with a discussion of atmospheric and powered combustion systems and pilot burners.
This module focuses on the controlled combustion process. Gas controls, the manual and automatic valves and regulators which control the flow of fuel gas to the orifice and burner, will be explained. The function and operation of various gas controls will be included.
This module continues coverage of gas furnace controls by focusing on gas ignition systems.
This module focuses on Safety Controls, Operating Controls, and System Controls.
This module covers a review of gas furnace application practices, installation practices which include gas piping design and installation, furnace start-up procedures, and customer relations.
This module discusses venting and combustion air in detail. Proper ventilation and combustion air practices are covered by local codes and the National Fuel Gas Code. This module presents the principles and practices of proper venting, but does not supplant these codes.
In the first section of this module the basic approach to troubleshooting is covered. The next section is devoted to those practices that are necessary to determine if the furnace is performing properly or needs adjustment. This module will cover such things as checking and adjusting gas input, adjusting primary air, and efficiency checking, The last section of this module discusses actual furnace problems and how to identify and correct them.