Explain the mechanical refrigeration cycle and how it applies to modern cooling systems.
Describe the methods used to meet Environmental Protection Agency (EPA) indoor air quality standards in modern ventilation systems.
Trade Math
Calculate the cubic feet in a cube or rectangular prism to determine the size HVAC unit needed for a given structure.
Convert pressures and temperatures using the PT chart to determine and set coil pressure.
Solve algebraic equations for designing, adjusting, modifying, or troubleshooting an HVAC system.
Examples: pressure calculations, air flow volume change
Electricity
Explain the fundamentals of electricity and how it is generated.
Describe the components of a basic electrical circuit and identify electrical symbols on a schematic diagram, including a compressor, fan motor, and transformer.
Apply Ohm’s law to troubleshoot electrical issues in an HVAC system.
Use the power formula to calculate how much power a device is consuming.
Explain the difference between parallel and series circuits and ways they are used.
Measure voltage, amperage, and resistance on an electrical circuit.
Explain the difference between a ladder diagram and a wiring schematic.
HVAC Installation and Operation
Foundational Standards
Incorporate safety procedures in handling, operating, and maintaining tools and machinery; handling materials; utilizing personal protective equipment; maintaining a safe work area; and handling hazardous materials and forces.
Demonstrate effective workplace and employability skills, including communication, awareness of diversity, positive work ethic, problem-solving, time management, and teamwork.
Explore the range of careers available in the field and investigate their educational requirements, and demonstrate job-seeking skills including resume-writing and interviewing.
Advocate and practice safe, legal, responsible, and ethical use of information and technology tools specific to the industry pathway.
Participate in a Career and Technical Student Organization (CTSO) to increase knowledge and skills and to enhance leadership and teamwork.
Licensing and Certification
Explain the importance and purposes of certification, licensing, rules, and regulating agencies in the HVAC industry.
Heating Fundamentals
Describe the role of forced air furnaces in residential comfort systems.
Explain the differences between a heat pump and a furnace.
Explain how a combustion analyzer works.
Size flue exhaust pipes and combustion air grilles, using international fuel gas code books.
Describe the functions of the components in an electric heat system.
Explain the principles of hydronic heating.
Describe the refrigeration cycle and the changes of state that occur.
Explain the law of thermodynamics and the pressure-temperature relationship.
Explain the function of a compressor and a metering device in the refrigeration process.
Contrast water-cooled condensers and air-cooled condensers.
Contrast direct expansion systems and chiller systems.
