Class Listings & Descriptions

AHR-110: Introduction to Refrigeration

This course introduces the basic refrigeration process used in mechanical refrigeration and air conditioning systems. Topics include terminology, safety, and identification and function of components; refrigeration cycle; and tools and instrumentation used in mechanical refrigeration systems. Upon completion, students should be able to identify refrigeration systems and components, explain the refrigeration process, and use the tools and instrumentation of the trade.

Course Prerequisites:
None
Total Credits:5
Class Credits:2
Lab Credits:6
Clinic Credits:0

AHR-111: HVACR Electricity

This course introduces electricity as it applies to HVACR equipment. Emphasis is placed on power sources, interaction of electrical components, wiring of simple circuits, and the use of electrical test equipment. Upon completion, students should be able to demonstrate good wiring practices and the ability to read simple wiring diagrams.

Course Prerequisites:
None
Total Credits:3
Class Credits:2
Lab Credits:2
Clinic Credits:0

AHR-112: Heating Technology

This course covers the fundamentals of heating including oil, gas, and electric heating systems. Topics include safety, tools and instrumentation, system operating characteristics, installation techniques, efficiency testing, electrical power, and control systems. Upon completion, students should be able to explain the basic oil, gas, and electrical heating systems and describe the major components of a heating system.

Course Prerequisites:
None
Total Credits:4
Class Credits:2
Lab Credits:4
Clinic Credits:0

AHR-113: Comfort Cooling

This course covers the installation procedures, system operations, and maintenance of residential and light commercial comfort cooling systems. Topics include terminology, component operation, and testing and repair of equipment used to control and produce assured comfort levels. Upon completion, students should be able to use psychrometrics, manufacturer specifications, and test instruments to determine proper system operation.

Course Prerequisites:
None
Total Credits:4
Class Credits:2
Lab Credits:4
Clinic Credits:0

AHR-113C: Comfort Cooling

This course covers the installation procedures, system operations, and maintenance of residential and light commercial comfort cooling systems. Topics include terminology, component operation, and testing and repair of equipment used to control and produce assured comfort levels. Upon completion, students should be able to use psychrometrics, manufacturer specifications, and test instruments to determine proper system operation.

Course Prerequisites:
None
Total Credits:2
Class Credits:2
Lab Credits:0
Clinic Credits:0

AHR-113L: Comfort Cooling

This course covers the installation procedures, system operations, and maintenance of residential and light commercial comfort cooling systems. Topics include terminology, component operation, and testing and repair of equipment used to control and produce assured comfort levels. Upon completion, students should be able to use psychrometrics, manufacturer specifications, and test instruments to determine proper system operation.

Course Prerequisites:
None
Total Credits:2
Class Credits:0
Lab Credits:4
Clinic Credits:0

AHR-114: Heat Pump Technology

This course covers the principles of air source and water source heat pumps. Emphasis is placed on safety, modes of operation, defrost systems, refrigerant charging, and system performance. Upon completion, students should be able to understand and analyze system performance and perform routine service procedures.

Course Prerequisites:
Take AHR-110(S23419) or AHR-113(S23422); Take previously. Required.
Total Credits:4
Class Credits:2
Lab Credits:4
Clinic Credits:0

AHR-115: Refrigeration Systems

This course introduces refrigeration systems and applications. Topics include defrost methods, safety and operational control, refrigerant piping, refrigerant recovery and charging, and leak testing. Upon completion, students should be able to assist in installing and testing refrigeration systems and perform simple repairs.

Course Prerequisites:
Take AHR-110(S14098); Take previously. Required.
Total Credits:2
Class Credits:1
Lab Credits:3
Clinic Credits:0

AHR-120: HVACR Maintenance

This course introduces the basic principles of industrial air conditioning and heating systems. Emphasis is placed on preventive maintenance procedures for heating and cooling equipment and related components. Upon completion, students should be able to perform routine preventive maintenance tasks, maintain records, and assist in routine equipment repairs.

Course Prerequisites:
None
Total Credits:2
Class Credits:1
Lab Credits:3
Clinic Credits:0

AHR-125: HVACR Electronics

This course introduces the common electronic control components in HVACR systems. Emphasis is placed on identifying electronic components and their functions in HVACR systems and motor-driven control circuits. Upon completion, students should be able to identify components, describe control circuitry and functions, and use test instruments to measure electronic circuit values and identify malfunctions.

Course Prerequisites:
Take AHR-111(S23420) ELC-111 or ELC-112(S21587); Take previously. Required.
Total Credits:3
Class Credits:2
Lab Credits:2
Clinic Credits:0

AHR-133: HVAC Servicing

The course covers the maintenance and servicing of HVAC equipment. Topics include testing, adjusting, maintaining, and troubleshooting HVAC equipment and record keeping. Upon completion, students should be able to adjust, maintain, and service HVAC equipment.

Course Prerequisites:
Take AHR-112(S23421) or AHR-113(S23422); Take either previously or concurrently. Required.
Total Credits:4
Class Credits:2
Lab Credits:6
Clinic Credits:0

AHR-140: All-Weather Systems

This course covers the principles of combination heating and cooling systems including gas-electric, all-electric, and oil-electric systems. Topics include PTAC's and package and split-system units. Upon completion, students should be able to understand systems performance and perform routine maintenance procedures.

Course Prerequisites:
Take AHR-112(S14102) or AHR-113(S14131); Take previously. Required.
Total Credits:2
Class Credits:1
Lab Credits:3
Clinic Credits:0

AHR-151: HVAC Duct Systems I

This course introduces the techniques used to lay out and fabricate duct work commonly found in HVAC systems. Emphasis is placed on the skills required to fabricate duct work. Upon completion, students should be able to lay out and fabricate simple duct work.

Course Prerequisites:
None
Total Credits:2
Class Credits:1
Lab Credits:3
Clinic Credits:0

AHR-160: Refrigerant Certification

This course covers the requirements for the EPA certification examinations. Topics include small appliances, high pressure systems, and low pressure systems. Upon completion, students should be able to demonstrate knowledge of refrigerants and be prepared for the EPA certification examinations.

Course Prerequisites:
None
Total Credits:1
Class Credits:1
Lab Credits:0
Clinic Credits:0

AHR-180: HVACR Customer Relations

This course introduces common business and customer relation practices that may be encountered in HVACR. Topics include business practices, appearance of self and vehicle, ways of handling customer complaints, invoices, telephone communications, and warranties. Upon completion, students should be able to present themselves to customers in a professional manner, understand how the business operates, complete invoices, and handle complaints.

Course Prerequisites:
None
Total Credits:1
Class Credits:1
Lab Credits:0
Clinic Credits:0

AHR-211: Residential System Design

This course introduces the principles and concepts of conventional residential heating and cooling system design. Topics include heating and cooling load estimating, basic psychrometrics, equipment selection, duct system selection, and system design. Upon completion, students should be able to design a basic residential heating and cooling system.

Course Prerequisites:
None
Total Credits:3
Class Credits:2
Lab Credits:2
Clinic Credits:0

AHR-212: Advanced Comfort Systems

This course covers water-cooled comfort systems, water-source/geothermal heat pumps, and high efficiency heat pump systems including variable speed drives and controls. Emphasis is placed on the application, installation, and servicing of water-source systems and the mechanical and electronic control components of advanced comfort systems. Upon completion, students should be able to test, analyze, and troubleshoot water-cooled comfort systems, water-source/geothermal heat pumps, and high efficiency heat pumps.

Course Prerequisites:
Take AHR-114(S14084); Take previously. Required.
Total Credits:4
Class Credits:2
Lab Credits:6
Clinic Credits:0

AHR-213: HVACR Building Code

This course covers the North Carolina codes that are applicable to the design and installation of HVACR systems. Topics include current North Carolina codes as applied to HVACR design, service, and installation. Upon completion, students should be able to demonstrate the correct usage of North Carolina codes that apply to specific areas of the HVACR trade.

Course Prerequisites:
None
Total Credits:2
Class Credits:1
Lab Credits:2
Clinic Credits:0

AHR-215: Commercial HVAC Controls

This course introduces HVAC control systems used in commercial applications. Topics include electric/electronic control systems, pneumatic control systems, DDC temperature sensors, humidity sensors, pressure sensors, wiring, controllers, actuators, and controlled devices. Upon completion, students should be able to verify or correct the performance of common control systems with regard to sequence of operation and safety.

Course Prerequisites:
Take AHR-111(S23420) ELC-111 or ELC-112(S23481); Take previously. Required.
Total Credits:2
Class Credits:1
Lab Credits:3
Clinic Credits:0

AHR-225: Commercial System Design

This course covers the principles of designing heating and cooling systems for commercial buildings. Emphasis is placed on commercial heat loss/gain calculations, applied psychometrics, air-flow calculations, air distribution system design, and equipment selection. Upon completion, students should be able to calculate heat loss/gain, design and size air and water distribution systems, and select equipment.

Course Prerequisites:
Take AHR-211(S10410); Take previously. Required.
Total Credits:3
Class Credits:2
Lab Credits:3
Clinic Credits:0

AHR-235: Refrigeration Design

This course covers the principles of commercial refrigeration system operation and design. Topics include walk-in coolers, walk-in freezers, system components, load calculations, equipment selection, defrost systems, refrigerant line sizing, and electric controls. Upon completion, students should be able to design, adjust, and perform routine service procedures on a commercial refrigeration system.

Course Prerequisites:
Take AHR-110(S14098); Take previously. Required.
Total Credits:3
Class Credits:2
Lab Credits:2
Clinic Credits:0

AHR-240: Hydronic Heating

This course covers the accepted procedures for proper design, installation, and balance of hydronic heating systems for residential or commercial buildings. Topics include heating equipment; pump, terminal unit, and accessory selection; piping system selection and design; and pipe sizing and troubleshooting. Upon completion, students should be able to assist with the proper design, installation, and balance of typical hydronic systems.

Course Prerequisites:
Take AHR-112(S14102); Take previously. Required.
Total Credits:2
Class Credits:1
Lab Credits:3
Clinic Credits:0

AHR-245: Chiller Systems

This course introduces the fundamentals of liquid chilling equipment. Topics include characteristics of water, principles of water chilling, the chiller, the refrigerant, water and piping circuits, freeze prevention, purging, and equipment flexibility. Upon completion, students should be able to describe the components, controls, and overall operation of liquid chilling equipment and perform basic maintenance tasks.

Course Prerequisites:
Take AHR-110(S14098); Take previously. Required.
Total Credits:2
Class Credits:1
Lab Credits:3
Clinic Credits:0

AHR-250: Heating, Ventilating, and Air Conditioning Diagnostics

This course is a comprehensive study of air conditioning, heating, and refrigeration system diagnostics and corrective measures. Topics include advanced system analysis, measurement of operating efficiency, and inspection and correction of all major system components. Upon completion, students should be able to restore a residential or commercial AHR system so that it operates at or near manufacturers' specifications. This course also includes variable air volume box set-up, test and balance air and water systems.

Course Prerequisites:
Take AHR-133; Take previously. Required.
Total Credits:2
Class Credits:0
Lab Credits:4
Clinic Credits:0

AHR-263: Energy Management

This course covers building automation computer programming as currently used in energy management. Topics include night setback, duty cycling, synchronization, schedule optimization, and anticipatory temperature control. Upon completion, students should be able to write programs utilizing the above topics and connect computer systems to HVAC systems.

Course Prerequisites:
Take AHR-125(S13194) or AHR-215(S10409); Take previously. Required.
Total Credits:2
Class Credits:1
Lab Credits:3
Clinic Credits:0