00 SYLLABUS (rev.01/6/2014)

Transcription

1 Austin Community College Heating, Air Conditioning & Refrigeration Technology HART2449 HEAT PUMPS 00 SYLLABUS (rev.01/6/2014) Course Description: a study of heat pumps, heat pump control circuits, defrost controls, auxiliary heat, air flow, and other topics related to heat pump systems. Course Level: intermediate Prerequisite: advanced Electricity (HART 2431) Supplies Required: quality multi-meter - digital preferred Textbooks/Materials:Textbooks/Materials:(Modern Refrigeration and Air Conditioning 19 th Edition ISBN: sold at the Acc bookstore. Course packet sold at Acc bookstore, Learning Outcomes: the student will explain a reverse cycle system; list the mechanical and electrical components for the heat operation; and explain the operation of heat pump modes including cooling, heating, defrost, emergency heat, and auxiliary heat mode. The student will identify and explain different methods of accomplishing defrost; check the system charge in the heating and cooling modes with a variety of metering devices; troubleshoot electrical and mechanical components; perform tests for adequate air flow; and determine balance point and CO.P. (Coefficiency of performance). Competencies for Heat Pumps Air Conditioning and Refrigeration Institute (ARI) Subtopic C Title: XII 4. Basic Principles and Components COMPETENCY OBJECTIVES: the student will- Knowledge: Review the history of heat pumps Explain basic heat pump principles of operation Analyze and explain the refrigerant cycle in both cooling and heating identifying the pressure and state of the refrigerant at any point in the refrigerant circuit. Explain the basic theory of the air source heat pump system. Explain the basic theory of the water source heat pump system. Explain the basic theory of geothermal source heat pump system. Identify and explain the function of the electrical and mechanical components of the heat pump systems. Explain terms typically used for heat pumps: SEER, COP, HSPF, Balance Points, ODT. Explain the different types of defrost methods. Describe the operation of the time clock in a defrost control. Identify three components of a heat pump system controlled directly during a defrost cycle. Describe a heat pump thermostat function. Tasks: Examine a reversing valve for proper temperatures. Calculate both economic and thermal balance points. Calculate temperature settings for multiple outdoor thermostats. Assess refrigerant charge using charging chart. Ensure proper sequence of operation of an air-to-air split system heat pump for cooling, heating, and defrost modes. SUBTOPIC TITLE: XILB. Applications

2 Identify and describe different types of heat pump systems, including: a) air-cooled, and b) water-source such as - open loop, closed loop, air-to-water, water-to-water, and geothermal. Analyze and compare the operation and performance of the different types of heat pump systems. Explain the integration and operation of the air-to-air heat pump with electric resistance heat. Explain the integration and operation of the water-to-air heat pump with electric resistance heat. Explain the integration and operation of the air-to-air heat pump with fossil fuel heat. Explain applications for open vs. closed loop geothermal heat pump systems. Tasks: Prepare for installation (mechanically and electrically) an*air-to-air heat pump. UNIT: CONTROLS SUBTOPIC TITLE: VILE. Heat Pump Controls Explain the operation and function of a reversing valve. Identify types of common defrost control systems. Explain the operation of common defrost control systems. Explain the operation of flow and safety control for geothermal heat pumps. Describe the purpose and function of outdoor thermostats. Describe the sequence and purpose of emergency heat controls. Identify and explain the operation of check valves in heat pumps. Describe the sequence between first stage and second stage heating thermostat. Describe the auxiliary heat controls. Select and install appropriate system thermostat. Connect the control circuit wires of a heat pump system. Install or replace a heat sequencing relay. Perform tests on reversing valve to determine if mechanical or electrical failure. UNIT: SYSTEM INSTALLATION AND START-UP SUBTOPIC TITLE: XVLB. Heat Pump Start-up, Checkout and Operation Recognize the importance of manufacturers' installation and operation requirements. Recognize alternative fuel methods. Demonstrate use of tools and test equipment. Determine equipment electrical requirements. Verify equipment air flow and distribution. Verify operation of all electrical and mechanical components. Evaluate system operation in the heating, cooling, and defrost nitedes. Evaluate supplementary and emergency heat. Provide customer instruction on operation and maintenance of system. \ UNIT: SYSTEM SERVICE AND TROUBLESHOOTING SUBTOPIC TITLE: XVII.D. Heat Pump Service and Problem Analysis

3 Test and evaluate the operation of the refrigerant cycle in heating mode and cooling mode. Test the operation of the supplementary heat component(s). Test the operation of the emergency heat status for the heat pump system. Record appropriate data to evaluate complete system operation. Determine proper operation of the reversing valve. Confirm operation of defrost controls. Examine wiring and tighten loose connections. UNIT: PREVENTIVE MAINTENANCE SUBTOPIC TITLE: XIXA. Basic Maintenance Explain the various types of maintenance programs. Explain broad tasks and frequencies for a quality program. Explain why each step of the Preventive Maintenance Program is necessary. Explain the benefits associated with proper equipment maintenance. Demonstrate various maintenance tasks. Develop a plan for Preventive Maintenance of a heat pump system. Students enrolling in this class should expect to gain substantial knowledge and skills about heat pump systems. Persons that may expect to utilize this experience are those responsible for installation, maintenance and operations of these types of air conditioning systems. Heat Pumps is not a self-paced course. The instructor schedules lectures, videos, and labs. All tests are to be taken during scheduled class meetings. Video programs will be presented to the class as a group, with a follow up discussion of the program content and Q & A. You will use a computer to operate the S1MUPUMP troubleshooting trainer. The simulated troubleshooting program provides an enhanced training method that accelerates learning normal heat pump operation and fault conditions. Lesson objectives that may be completed outside the classroom are: reading textbook references and answering associated questions; previewing lab exercises and, inspection of the heat pumps in the lab. COURSE OUTLINE HART2449 Heat Pumps PRINCIPLES and COMPONENTS Basic Principles and Components Heat Pump Construction Simupump Trainer Refrigerant Circuits and Components Electrical Components SECTION TEST: PRINCIPLES AND COMPONENTS APPLICATIONS & CONTROLS

4 Air- and Water-Source Applications Heat Pump Efficiency Electrical Circuits Heat Pump Controls Electrical Component Sequence of Operations Install and Checkout a Heat Pump Thermostat Heat Pump Defrost Controls SECTION TEST: APPLICATIONS & CONTROLS INSTALLATION and STARTUP Installation Techniques Puron Split-system Products Product Data Puron Heat Pump Installation Startup Air Flow SECTION TEST: INSTALLATION and STARTUP SERVICE. TROUBLESHOOTING, and PREVENTIVE MAINTENANCE Troubleshooting Mechanical Service Electrical Service Reversing Valve Preventive Maintenance and Owner Service SECTION TEST: SERVICE and TROUBLESHOOTING 28. FINAL EXAM

5 HART 2449 Heat Pumps - Progress & Evaluation Record (08/07/2012) Name: ID # Synonym Lesson Title Date Labs Tests Final l Basic Principles and Components 2 Heat Pump Construction 3 Simupump Trainer 4 Refrigerant Circuits and Components 5 Electrical Components 6 Section Tests: Principles and Components ' 7 Air and Water-Source Applications 8 Heat Pump Efficiency 9 Electrical Circuits 10 Heat Pump Controls 11 Electrical Component Sequence of 12 Install and Checkout a Heat Pump 13 Heat Pump Defrost Controls 14 Section Tests: Applications and Controls 15 Installation Techniques 1 16 Puron Split System Products 17 Product Data 18 Puron Heat Pump Installation 19 Startup 20 Air Flow 21 Section Test: Installation and Start-Up 22 Troubleshooting 23 Mechanical Service 24 Electrical Service 25 Reversing Valve 26 Preventative Maintenance and Owner 27 Section Test : Service and 28 Final Exam Labs total = * 23 x Tests total = * 4 x Final total = x = A; = B; = C; = D GPA = Instructor's Signature: Date: