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  • REFG 123: Electrical Lab I

    2.00 Credits
    North Dakota State College of Science

    This course will serve as a counter-part of the electrical theory class. The student will examine the electrical laws of voltage, current, resistance, and power by connecting circuits, measuring electrical data, and then comparing this data to the calculated values. Electrical meter operation and application, as well as safety practices will be focal points of the course. Control circuits will also be designed and examined. Emphasis will be placed on learning a solid understanding of the electrical fundamentals and troubleshooting skills necessary to work in the HVAC/R industry. Corequisite: REFG 121. (F)
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  • REFG 124: Electrical Lab II

    2.00 Credits
    North Dakota State College of Science

    This course will focus on preparing students for success in the HVAC/R industry. Because of the many electrical drive motors, electrical controls and in general, the large amount of electrical type problems likely to be encountered, the technician needs to be skilled in diagnostics, circuit diagrams and electrical meter application. This course will prepare students to that end. Students will be exposed to real circuits. Placing the volt, ohm and amp meter test leads on the circuit to discover what troubleshooting clues the readings will indicate. Time will be spent creating circuits by reading schematic wiring diagrams. Participants will be Prerequisites: REFG 101, REFG 102, REFG 121, REFG 123, or equivalents. (F)
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  • REFG 201: Refrigeration Technology

    3.00 Credits
    North Dakota State College of Science

    This course will be an in-depth analysis of the refrigeration cycle. Students will use Pressure/Enthalpy diagrams to learn how dynamically the system operates and how changes in any area will affect the entire system. Proper piping and pipe sizing techniques will be studied and applied. Prerequisites: REFG 101, REFG 102. (F)
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  • REFG 202: Refrigeration Technology

    3.00 Credits
    North Dakota State College of Science

    This course will provide a study of commercial refrigeration systems from a service and installation perspective. This will include studies of heat pumps, supermarket systems, ice making equipment and restaurant/food service equipment. The course emphasis will include system charging techniques, maintenance and troubleshooting. Prerequisite: REFG 201. (S)
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  • REFG 211: Commercial Components Lab

    2.00 Credits
    North Dakota State College of Science

    This course will explore the special components that are used with commercial refrigeration equipment and examine their application in operating systems. Attention will be given to system balance, in-depth compressor analysis, defrost methods, capacity controls, head pressure controls and refrigerant oils and temperature control methods. Prerequisites: REFG 101, REFG 102, REFG 112, REFG 113, or equivalents. (F)
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  • REFG 212: Advanced Systems Lab

    2.00 Credits
    North Dakota State College of Science

    This course will introduce students to more advanced systems such as parallel rack systems, ice machines, compound systems and cascade systems. An emphasis will be placed on developing HVAC/R troubleshooting techniques. Prerequisites: REFG 201, REFG 202, REFG 211 or equivalents. (S)
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  • REFG 226: Building System Controls

    3.00 Credits
    North Dakota State College of Science

    This course will begin with a review of electrical theory, relay logic, schematic diagram interpretation and troubleshooting. It will then introduce students to different automatic control systems used in the HVAC/R industry. As time permits, the course will begin with electromechanical controls and then proceed to pneumatics, direct digital controls, programmable logic controls and variable frequency drives. Prerequisites: REFG 121, REFG 122, REFG 123, REFG 124. (S) will be an emphasis on Ohm's Law, series circuits, parallel circuits and series-parallel circuits. The student will be instructed on electric meters and their usage. Transformers, Alternating Current and Power Distribution Systems will also be studied. The course will also provide instruction in the components, symbols and circuits used in the HVAC/R industry. Corequisite: REFG 123. (F)
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  • REFG 231: Air Conditioning Design

    3.00 Credits
    North Dakota State College of Science

    This course is a lab, discussion and completion format that covers heating loss/gain on many structures as well as forced air duct design, lay out and balancing. The class will discuss and calculate hydronic heating systems and how to determine required equipment for specific buildings. When available, balancing will take place on site utilizing real buildings. The course includes classroom, traditional lab, homework and computer lab and building location work. Prerequisites: REFG 101, REFG 102, REFG 111, REFG 113. (F)
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  • REFG 232: Air Conditioning Design

    3.00 Credits
    North Dakota State College of Science

    Students will examine age-old questions. How big is big enough? How does one properly determine heating and cooling system size? With the energy efficient equipment that is available to us today in the HVAC industry, there comes the responsibility to size the equipment to the building energy loss or gain. Why size it correctly? Customer comfort, equipment life span and trouble free energy efficient performance are a few of the many good reasons. This course will provide a working knowledge of the basics necessary to see HVAC system installation from sizing, planning and layout, selecting equipment, material list, to the completed balanced forced air system. Prerequisite: REFG 231. (S)
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  • REFG 253: Heating Equipment Theory

    2.00 Credits
    North Dakota State College of Science

    This subject matter will provide a broad exposure to a wide variety of heating equipment and their service needs. There will be in-depth discussion on gas, oil and electric heating equipment, as well as the mechanical, fuel combustion and electrical service. This course ties together how the installation of equipment affects the efficiency, all around performance and length of service equipment will have for the end user. The course covers most aspects of heating service and is accompanied by the heating equipment lab to allow application of content covered in this lecture. Prerequisites: REFG 101, REFG 102, REFG 121, REFG 123, or equivalents. (S)
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