A/C and Refrigeration (AIR) at Patrick Henry Community College


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AIR 95 - Topics In
Provides an opportunity to explore topical areas of interest to or needed by students.
May be used also for special honors courses. May be repeated for credit. Variable hours.
1-5 credits
AIR 117 - Metal Layout I
Presents measuring and gauging of sheet metal, types of metal, handling sheet metal, cutting and bending, layout. Teaches fundamentals of drafting, basic drawing instruments, lettering practices.
Lecture 1-2 hours. Laboratory 3-6 hours. Total 5-7 hours per week.
3 credits
AIR 121 - Air Conditioning and Refrigeration I
Studies refrigeration theory, characteristics of refrigerants, temperature, and pressure, tools and equipment, soldering, brazing, refrigeration systems, system components, compressors, evaporators, metering devices. Presents charging and evaluation of systems and leak detection. Explores servicing the basic system. Explains use and care of oils and additives and troubleshooting of small commercial systems. Part I of II.
Lecture 2-3 hours. Laboratory 2-3 hours. Total 4-6 hours per week.
3-4 credits
AIR 126 - Electrical and Control Systems
Presents trouble-shooting and servicing the electrical components of small refrigeration systems including basic electricity for refrigeration, electrical controls of refrigeration systems, electrical motors, motor control, motor starters, relays, overloads, instruments, and control circuits.
Lecture 1 hour. Laboratory 3 hours. Total 4 hours per week.
2 credits
AIR 134 - Circuits and Controls I
Presents circuit diagrams for air conditioning units, reading and drawing of circuit diagrams, types of electrical controls. Includes analysis of air conditioning circuits, components, analysis and characteristics of circuits and controls, testing and servicing. Introduces electricity for air conditioning which includes circuit elements, direct current circuits and motors, single and three-phase circuits and motors, power distribution systems, and protective devices. Studies the electron and its behavior in passive and active circuits and components. Demonstrates electronic components and circuits as applied to air conditioning system. Part I of II.
Lecture 2-3 hours. Laboratory 2-6 hours. Total 4-9 hours per week.
3-4 credits
AIR 135 - Circuits and Controls II
Presents circuit diagrams for air conditioning units, reading and drawing of circuit diagrams, types of electrical controls. Includes analysis of air conditioning circuits, components, analysis and characteristics of circuits and controls, testing and servicing. Introduces electricity for air conditioning which includes circuit elements, direct current circuits and motors, single and three-phase circuits and motors, power distribution systems, and protective devices. Studies the electron and its behavior in passive and active circuits and components. Demonstrates electronic components and circuits as applied to air conditioning system. Part II of II.
Lecture 2-3 hours. Laboratory 2-6 hours. Total 4-9 hours per week.
3-4 credits
AIR 136 - Circuits and Controls III
Introduces types of circuits and controls used in home, commercial and industrial air conditioning systems. Includes servicing and installation procedures for electrical unloading of compressors, single- and two-stage thermostats, and electrical regulation of fan speed for air volume control. Explains operational and safety control and how schematic and pictorial diagrams are used in these systems.
Lecture 2-3 hours. Laboratory 3-6 hours. Total 4-9 hours per week.
3-4 credits
AIR 154 - Heating Systems I
Introduces types of fuels and their characteristics of combustion; types, components and characteristics of burners, and burner efficiency analyzers. Studies forced air heating systems including troubleshooting, preventive maintenance and servicing. Part I of II.
Lecture 2-3 hours. Laboratory 2-6 hours. Total 4-8 hours per week.
3-4 credits
AIR 156 - Heating Systems III
Introduces types of boilers, sizing boilers, sizing radiators and convectors, designing piping systems for steam, hot water and vacuum systems. Includes testing and servicing wet heat systems.
Lecture 1-2 hours. Laboratory 2-4 hours. Total 3-6 hours week.
2-3 credits
AIR 158 - Mechanical Codes
Presents mechanical code requirements for installation, service, and inspection procedures . Uses the BOCA code in preparation for the master's card.
Lecture 1-2 hours per week.
1-2 credits
AIR 159 - Heating and Cooling Safety
Presents standard safety procedures used in the heating and cooling industry. Discusses proper handling of equipment refrigerants and electricity.
Lecture 1 hour per week.
1 credits
AIR 161 - Heating, Air and Refrigeration Calculations I
Introduces fractions, decimals, sign of operations, equations, Ohm's Law, subtraction, multiplication and division of signed numbers. Teaches fundamentals of algebra, expression of stated problems in mathematical form, and solutions of equations. Part I of II.
Lecture 2-3 hours. Laboratory 1-3 hours. Total 3-6 hours per week.
3-4 credits
AIR 190 - Coordinated Internship
Supervises on-the-job training in selected business, industrial or service firms coordinated by the college.
Credit/practice ratio not to exceed 1:5 hours. May be repeated for credit. Variable hours.
1-5 credits
AIR 195 - Topics In
Provides an opportunity to explore topical areas of interest to or needed by students.
May be used also for special honors courses. May be repeated for credit. Variable hours.
1-5 credits
AIR 197 - Cooperative Education
Supervises in on-the-job training for pay in approved business, industrial and service firms, coordinated by the college's cooperative education office. Is applicable to all occupational- technical curricula at the discretion of the college.
Credit/work ratio not to exceed 1:5 hours. May be repeated for credit. Variable hours.
1-5 credits
AIR 200 - Hydronics
Presents design and installation of hydronic systems for heating and cooling. Includes steam heated and chilled water systems. Primarily concerns systems using water under forced circulation.
Lecture 1-2 hours. Laboratory 2-3 hours. Total 3-5 hours per week.
2-3 credits
AIR 205 - Hydronics and Zoning
Presents installation, servicing, troubleshooting, and repair of hydronic systems for heating and cooling. Includes hot water and chilled water systems using forced circulation as the transfer medium.
Lecture 2-3 hours. Laboratory 2-3 hours. Total 4-6 hours per week.
3-4 credits
AIR 233 - Circuits and Controls VI
Studies planning and design of electric, pneumatic, and combination control systems used in the air conditioning industry.
Lecture 2 hours. Laboratory 3 hours. Total 5 hours per week.
3 credits
AIR 235 - Heat Pumps
Studies theory and operation of reverse cycle refrigeration including supplementary heat as applied to heat pump systems, including service, installation and maintenance.
Lecture 2-3 hours. Laboratory 2-3 hours. Total 4-6 hours per week.
3-4 credits
AIR 238 - Advanced Troubleshooting and Service
Presents advanced service techniques on wide variety of equipment used in refrigeration, air conditioning, and phases of heating and ventilation and controls.
Lecture 2-3 hours. Laboratory 2-3 hours. Total 4-6 hours per week.
3-4 credits
AIR 253 - Air Conditioning Systems III
Presents air balancing including taking duct pressure readings, finding register and grille CFM's, fans, laws and their applications. Explores instruments used for air balancing and proper procedures. Studies water-cooled and air-cooled condensers, refrigerant piping design, capacity control, air washers, water and steam piping arrangements. Part I of II.
Lecture 2-3 hours. Laboratory 2-3 hours. Total 4-6 hours per week.
3-4 credits
AIR 254 - Air Conditioning Systems IV
Presents air balancing including taking duct pressure readings, finding register and grille CFM's, fans, laws and their applications. Explores instruments used for air balancing and proper procedures. Studies water-cooled and air-cooled condensers, refrigerant piping design, capacity control, air washers, water and steam piping arrangements. Part II of II.
Lecture 2-3 hours. Laboratory 2-3 hours. Total 4-6 hours per week.
3-4 credits
AIR 257 - Gas Fired Warm Air Furnaces
Covers the study of mid and high efficiency gas-fired warm air furnaces and their components. Includes equipment components, installation, servicing and maintenance. Prerequisite AIR 155.
Lecture 2-3 hours. Laboratory 2-3 hours. Total 4-6 hours per week.
3-4 credits
AIR 290 - Coordinated Internship
Supervises on-the-job training in selected business, industrial or service firms coordinated by the college.
Credit/practice ratio not to exceed 1:5 hours. May be repeated for credit. Variable hours.
1-5 credits
AIR 295 - Topics In
Provides an opportunity to explore topical areas of interest to or needed by students.
May be used also for special honors courses. May be repeated for credit. Variable hours.
1-5 credits
AIR 299 - Supervised Study
Assigns problems for independent study incorporating previous instruction and supervised by the instructor.
May be repeated for credit. Variable hours.
1-5 credits