Modern Refrigeration and Air Conditioning Instructor Resources HVAC Excellence Correlation Chart Heat Pumps. Heat Pumps

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1 Heat Pumps Students should have knowledge of: Refrigerant recovery Refrigerant recycling Refrigerant reclamation Refrigerant charging Soldering and brazing techniques Chapters 8, 40, 52 Refrigerant thermodynamics Chapters 4, 5, 9, 32, 40, 50 Residential air conditioning and electric heating systems Chapters 31, 32, 40, 43 Psychrometrics Chapter 27 Safety Students should have knowledge of and be able to demonstrate the following safety requirements: Ladder safety procedures Chapters 2, 33 Fall prevention procedures Chapters 2, 33 Refrigerant handling Chapters 9, 10, 11 Nitrogen handling procedures Chapters 2, 8, 9, 10, 11, 25, 26, 52, 53, 54, 55 Heat Pump Systems and Components Students must have knowledge of heat pump systems and components and be able to: Describe the principles of dehumidification and humidification Chapters 35, 40 Describe the six types of leak detectors Chapters 10, 11 Describe the method of pinpointing a refrigerant leak Chapters 10, 11 Explain the use and handling of nitrogen in the leak detection process Chapters 10, 11, 52 Explain the operation and use of a gauge manifold assembly Chapters 10, 11, 40 1

2 Determine proper charging of HCFC and HFC refrigerants into an operating system Determine proper charging of HCFC and HFC refrigerants into an empty system Select the proper refrigerant oil for an operating system Chapters 9, 10, 11, 18, 19, 40 Explain charging using the manufacturer s literature Determine required superheat and subcooling for an operating system Calculate the amount of refrigerant required for a system to weigh in a charge Explain charging using the superheat method Explain charging using the subcooling method Describe the triple evacuation method Identify the types of micron gauges Explain the method for connecting a micron gauge to the system Describe the function of a lockout relay in a circuit Chapters 16, 33,, 52 Describe the function of and the testing method for a run and start capacitor Chapters 12, 15, 17 Describe and install a compressor potential start relay Chapters 12, 13, 15, 16, 17, 52 Describe the operation of and the testing method for a highpressure switch Describe the operation of and the testing method for a lowpressure switch Identify and differentiate between the various types of service valves Chapters 13, 14, 15, 16, 17, 40, 53, 54, 55 Chapters 13, 14, 15, 16, 17, 40, 53, 54, 55 Chapters 10, 22, 40, 53, 54, 55 Explain the function of a liquid line drier Chapters 6, 22, 40, 52, 53, 54 Explain the function of a liquid line bi flow drier Chapters 6, 22, 40, 52, 53, 54 Explain the function of a suction line filter-drier Chapters 6, 22, 40, 52, 53, 54 Describe the procedure to perform a compressor efficiency test Chapters 51, 53, 54 2

3 Describe the operation of a heat/cool relay Chapters 36, 40 Describe the operation of the following defrost controls: mechanical, time/temperature, and solid-state State the purpose of and testing method for a bimetal outdoor coil temperature sensor Chapters 14, 15, 16, 17, Chapters 16, 36, 40 Describe a thermistor type temperature sensor (PTC & NTC) Chapters 16, 36, 40 Describe a heat pump s design, configuration for both the heating and cooling cycle Chapter 40 Describe the sequence of the defrost cycle Chapter 40 Describe the operation of and the testing method for a defrost relay Describe the function of and testing method for an outdoor thermostat Describe the function and the control methods used by an indoor electronic thermostat Explain how the set points for outdoor thermostats are established Chapters 13, 16, 17, 40 Chapters 13, 16, 17, 36, 40 Chapters 13, 16, 17, 36, 40 Chapter 40 Describe the operation of a reversing valve Chapters 22, 40 Describe the procedures for testing the operation of a reversing valve Chapters 17, 22, 32, 36, 40, 54 State the purpose of an accumulator and how it is constructed Chapters 6, 22, 40 Describe the principle of operation of a capillary tube Chapters 6, 20, 40 Describe the principle of operation of a fixed orifice Chapters 6, 20, 40 Describe the principle of operation of a thermostatic expansion valve Describe the principle of operation of an electronic expansion valve Describe the function of and the testing method for a control circuit fuse Chapters 6, 20, 40 Chapters 6, 20, 40 Chapters 13, 16, 17 Describe a heat pump thermostat with emergency heat feature Chapters 36, 40 Describe a defrost board and its operation Chapters 36, 40 3

4 Define SEER, HSPF, and COP Chapters 15, 17, 40, 46, 54 Describe heat pump charging procedures Chapters 10, 11, 40 Describe crankcase heating methods and how they operate Chapters 11, 18, 19, 22, 40, 52, 54, 55 Describe a check valve, its function, and operation Chapters 18, 19, 20, 21, 22, 40 Differentiate between a compressor designed for use in a heat pump and one that is designed for use in a cooling only air conditioner Students must have the knowledge, skills, and ability to: Chapters 18, 40 Find and repair a refrigerant leak Chapters 8, 10, 11, 40 Handle and use nitrogen in the leak detection process Chapters 10, 11, 54, 55 Demonstrate the operation and use of a gauge manifold assembly Chapters 10, 11, 40 Correctly use a micron gauge Connect a micron gauge to the system Perform the triple evacuation method Demonstrate proper charging of HCFC and HFC refrigerants into an operating system Demonstrate proper charging of HCFC and HFC refrigerants into an empty system Select the proper refrigerant oil and add it to an operating system, 55 Demonstrate charging using the manufacturer s literature, 52 Calculate and demonstrate the weigh-in charging method, 52 Accurately charge using the superheat method Accurately charge using the subcooling method Describe the function of a lockout relay in a circuit Chapters 16, 33,, 52 Test and install a run and start capacitor Chapters 12, 15, 16, 17 Evaluate and install a compressor potential start relay Chapters 12, 13, 15, 16, 17, 52 4

5 Evaluate and install a high-pressure switch Chapters 14, 15, 16, 17, 40, 53, 54, 55 Evaluate and install a low-pressure switch Chapters 14, 15, 16, 17, 40, 53, 54, 55 Evaluate and install a service valve Chapters 8, 10, 22, 40, 53, 54, 55 Evaluate and install a liquid line drier Chapters 8, 10, 22, 40, 53, 54, 55 Evaluate and install a liquid line bi-flow drier Chapters 8, 10, 22, 40, 53, 54, 55 Evaluate and install a suction line filter-drier Chapters 8, 10, 22, 40, 53, 54, 55 Perform a compressor efficiency test Chapters 51, 53, 54 Install a heat/cool relay Chapters 13, 16, 17, 36, Install a mechanical defrost control Chapters 8, 10, 13, 16, 17, 21, 36, Install a time/temperature defrost control Chapters 8, 10, 13, 16, 17, 21, 36, Install a solid-state defrost control Chapters 8, 10, 13, 16, 17, 21, 36, Service and install a bimetal outdoor coil temperature sensor Chapters 7, 8, 10, 13, 16, 17, 36, Service and install a thermistor type temperature sensor (PTC & NTC) Chapters 7, 8, 10, 13, 14, 16, 17, 36, Service and install a defrost relay Chapters 8, 10, 13, 16, 17, 21, 36, Service and install an outdoor thermostat Chapters 8, 10, 13, 16, 17, 21, 36, Evaluate and replace a reversing valve Chapters 8, 10, 22, 40 Evaluate and replace a accumulator Chapters 6, 8, 10, 11, 40 Evaluate and replace a capillary tube Chapters 6, 8, 10, 11, 20, 40 Service and install a fixed orifice Chapters 6, 8, 10, 11, 20, 40 Service and install a thermostatic expansion valve Chapters 6, 8, 10, 11, 20, 40 Service and install an electronic expansion valve Chapters 6, 8, 10, 11, 20, 40 5

6 Service and install a control circuit fuse Chapters 12, 13, 16, 17 Install a printed circuit board (PC) Chapters 12, 13, 14, 16, 17 Install a heat pump thermostat with emergency heat feature Chapters 13, 14, 16, 17, 36, 40 Evaluate and replace a defrost board Chapters 13, 14, 16, 17, 21 Measure system airflow Chapters 27, 29, 30 Evaluate and replace a check valve Chapters 7, 8, 10, 11, 40 Heat Pump Troubleshooting and Problem Solving Troubleshooting and problem solving involves diagnostic procedures requiring the use of test equipment, manufacturer s installation and start-up procedures, and data plate information. Knowledge of the following test instruments and/or tools is required: Thermometers (wet and dry) Gauge manifold assembly Chapters 7, 8, 10, 11, 13, 16, 17, 18, 22, 36, Chapters 7, 8, 10, 11, 12, 13, 17, 27, 30, 40 Recovery equipment Vacuum pump Micron gauge Leak detector Nitrogen cylinder Soldering and brazing equipment Charging scale and charging cylinder Refrigerant throttling valve Ohmmeter Ammeter Voltmeter Sling psychrometer 6

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