Heating, Air Conditioning & Refrigeration Technology

Grayson College's Heating, Air Conditioning and RefrigerationTechnology program offers three levels of training and skills. Many students start with the Technician Apprentice Certificate, then build on those skills with the Technician Certificate. The highest level is the Associate of Applied Science degree. Grayson College's courses teach the skills recommended by area employers who work in the industry. The program is offered on the Main Campus in the Career and Technology Center, which is equipped with the latest technology. 

Programs of study include:

  • Technician Apprentice Certificate (16 hours)

  • Technician Certificate (32 hours)

  • Associate of Applied Science Degree (60 hours)

Course Requirements

Grayson College requires a high school diploma or equivalent. The Associate of Applied Science Degree requires successful completion of the TSI requirements. Interested students are strongly encouraged to get advised and follow a degree plan, as some courses are not available every semester.

Capstone Experience

To earn a certificate in this program, all students must successfully complete a comprehensive exit exam prior to graduation.

Local Employers

Alpine, Worthington Air, Tyson Foods, Alverson Refrigeration

Associate of Applied Science Degree


Subject

Semester Hours



First Semester

HART 1407 4
HART 1401 4
ENGL 1301 3
DFTG 1325 3
MATH 1314, 1332, or 1342 3

17


Second Semester

HART 1445 4
HART 2442 4
Social/Behavioral Science 3
SPCH 1311, 1315, or 1321 3

14


Third Semester

HART 2436 4
Lang, Phil, Culture/Creative Arts 3
Math/Life & Physical Science Core 4
HART 2449 4

15


Fourth Semester

HART 2445 4
DFTG 1317 3
BUSG 2309 3
HART 1441 4

14
HART 1445, HART 2442, HART 2436, HART 2445 and HART 1441 are taught on a rotating basis. Two classes every 3rd semester.
Capstone Experience. All students must complete the capstone requirement: successful completion of a comprehensive exit exam prior to graduation.

Technician Apprentice


Subject

Semester Hours



First Semester

HART 1407 4
HART 1401 4

8


Second Semester

HART* 4
HART* 4

8
*Any two of the six (6) remaining HART courses. HART 1445, HART 2442, HART 2449, HART 2436, HART 2445 and HART 1441 are taught on a rotating basis. Two classes every 3rd semester.
Capstone Experience. All students must complete the capstone requirement: successful completion of a comprehensive exit exam prior to graduation.

Technician


Subject

Semester Hours



First Semester

HART 1407 4
HART 1401 4

8


Second Semester

HART* 4
HART* 4

8


Third Semester

HART* 4
HART* 4

8


Fourth Semester

HART* 4
HART* 4

8
*All six (6) of the remaining HART courses.
Capstone Experience. All students must complete the capstone requirement: successful completion of a comprehensive exit exam prior to graduation.

Students earning an Associate of Applied Science Degree at Grayson College must complete fifteen semester hours of a general education core. The core courses are distributed as follows:                                                                                                     

Mathematics/Life and Physical Sciences (3 hours)

MATH 1314 College Algebra                                                         

MATH 1324 Mathematics for Business & Social Sciences

MATH 1332 Contemporary Mathematics I

MATH 1342 Elementary Statistical Methods            

MATH 2312 Pre-Calculus Math

BIOL 1306/1106 Biology for Science Majors I

BIOL 1307/1107 Biology for Science Majors II

BIOL 1308/1108 Biology for Non-Science Majors I

BIOL 1309/1109 Biology for Non-Science Majors II

BIOL 1414 Introduction to Biotechnology I

BIOL 2301/2101 Anatomy & Physiology I

BIOL 2302/2102 Anatomy & Physiology II

BIOL 2404 Anatomy & Physiology (specialized, single-semester course, lecture + lab)

BIOL 2320/2120 Microbiology for Non-Science Majors

BIOL 2321/2121 Microbiology for Science Majors

CHEM 1406 Introductory Chemistry I (lecture + lab, allied health emphasis)

CHEM 1311/1111 General Chemistry I

CHEM 1312/1112 General Chemistry II

GEOL 1301/1101 Earth Sciences for Non-Science Majors I

GEOL 1303/1103 Physical Geology

GEOL 1304/1104 Historical Geology

GEOL 1305/1105 Environmental Science

Social and Behavioral Science (3 hours)

CRIJ 1307 Crime in America

ECON 2301 Principles of Macroeconomics

ECON 2302 Principles of Macroeconomics

GEOG 1303 World Regional Geography

GOVT 2305 Federal Government

GOVT 2306 Texas Government

HIST 1301 United States History I

HIST 1302 United States History II

PSYC 2301 General Psychology

PSYC 2314 Lifespan, Growth & Development

SOCI 1301 Introduction to Sociology

SOCI 1306 Social Problems

Language, Philosophy, Culture/Creative Arts (3 hours)

ARTS 1301 Art Appreciation

DRAM 1310 Stagecraft I

HUMA 1301 Introduction to the Humanities

HUMA 1302 Introduction to the Humanities II

MUSI 1306 Music Appreciation

PHIL 1301 Introduction to Philosophy

Component Area Option (6 hours) 

EDUC OR PSYC 1300 Learning Frameworks           

SPCH 1311 Introduction to Speech Communication

SPCH 1315 Public Speaking

SPCH 1321 Business & Professional Communication

ENGL 1301 Composition I

ENGL 1302 Composition II

ENGL 2311 Technical and Business Writing

SPAN 1411 Beginning Spanish I

SPAN 1412 Beginning Spanish II

**Any of the courses listed above in the previous Component Areas may be used for the hours toward the Component Area Option.

Principles of electricity as required by HVAC technicians including proper use of test equipment, A/C and D/C circuits, and component theory and operation. Advanced electrical instruction and skill building in installation and servicing of air conditioning and refrigeration equipment including detailed instruction in motors and power distribution, motors, motor controls and application of solid state devices. The student will exhibit knowledge of basic principles of electricity, electrical current, circuitry, and A/C devices; apply Ohm’s law to electrical calculations; perform electrical continuity, voltage and current tests with appropriate meters and demonstrate electrical safety.

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An introduction to the refrigeration cycle, basic thermodynamics, heat transfer, temperature/pressure relationship, safety, refrigeration containment, and refrigeration components. The student will identify the components and explain the application and operation of the basic refrigeration cycle; explain theories of thermodynamics and heat transfer; demonstrate proper application and use of tools, test equipment, and safety procedures; and demonstrate accepted refrigeration applications.

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A study of components, applications, and installation of mechanical air conditioning systems including operating conditions, troubleshooting, repair, and charging of air conditioning systems. Demonstrate systems applications; implement and demonstrate industry accepted refrigerant charging procedures; demonstrate air conditioning system installation procedures; and demonstrate component and part diagnostics and replacement.

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A study of the procedures and principles used in servicing heating systems including gas fired and electric furnaces. The student will identify different types of gas furnaces; identify and discuss component operation of gas furnaces; service and troubleshoot gas furnaces; perform safety inspections on gas and electric furnaces; identify unsafe operation of gas furnaces; identify and discuss component operation of electric furnaces; and service and troubleshoot electric furnaces.

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Theory of and practical application in the maintenance of commercial refrigeration; high, medium, and low temperature applications and ice machines. The student will explain and apply high, medium, and low temperature systems operation, and explain and apply ice machine and packaged refrigeration system operation.

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A study of the properties of air and results of cooling, heating, humidifying or dehumidifying; heat gain and heat loss calculations including equipment selection and balancing the air system. The student will calculate heat loss and heat gain; design a complete duct system; size heating and cooling equipment of the structure; perform a load calculation using Manual J.

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An advanced course in application of troubleshooting principles and use of test instruments to diagnose air conditioning and refrigeration components and system problems including conducting performance tests.

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A study of heat pumps, heat pump control circuits, defrost controls, auxiliary heat, air flow, and other topics related to heat pump systems. The student will be able to explain a reverse cycle system; list the mechanical and electrical components for the heat pump operation; and explain the operation of heat pump modes including cooling, heating, defrost, emergency heat, and auxiliary heat mode. Identify and explain different methods of accomplishing defrost; charge a system correctly in the heating and cooling mode; troubleshoot electrical and mechanical components; perform tests for adequate air flow; and determine balance point and co-efficiencies of performance (C.O.P.); and define attributes of geothermal heat pump systems.

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Last updated: 06/19/2017