HVACR 1 (First Semester)

 

[1a] - Provide a brief history of each component in the acronym HVACR.

[1b] - Describe the refrigeration cycle.

[1c] - Describe the sectors in which HVACR employment occurs and types of HVACR jobs.

[1d] - List HVACR trade associations and professional societies.

[1e] - List organizations and agencies that provide codes and standards used in the HVACR industry.

[2a] - Explain the benefits of a student membership in a professional society.

[2b] - Explain the importance of different student competency and entry-level exams for HVACR technicians.

[2c] - Explain the importance of different professional certifications for HVACR technicians.

[2d] - Describe the soft skills needed by HVACR technicians.

[3a] - Explain the role of OSHA in workplace safety.

[3b] - Describe the different types of personal protective equipment.

[3c] - Explain how to use ladders, scaffolds, and fall protection to work at heights safely.

[3d] - Describe safety measures to take when working in confined spaces.

[3e] - Explain the purpose of personal CO gas monitors.

[3f] - Describe the material that appears on Safety Data Sheets (SDSs).

[3g] - Explain how to practice safety in the shop.

[3h] - Explain how to respond to a shop or workplace accident or injury.

[3i] - Explain why safe driving habits are important to HVACR technicians.

[4a] - Identify the major tools found in HVACR tool kits.

[4b] - Explain why it is important to care for HVACR tools.

[4c] - Describe types of screwdrivers and how they are used in HVACR work.

[4d] - Describe types of pliers and how they are used in HVACR work.

[4e] - Describe types of wrenches and how they are used in HVACR work.

[4f] - Describe types of hammers and struck tools and their use in HVACR work.

[4g] - Describe types of metal working tools and how they are used in HVACR work.

[4h] - Describe other types of hand tools and how they are used in HVACR work.

[4i] - Describe types of power tools and how they are used in HVACR work.

[5a] - Describe the types of screws, bolts, and nuts used in HVACR work.

[5b] - Describe common types and sizes of nails, fasteners, anchors, and rivets used in HVACR work.

[5c] - Demonstrate how HVACR duct staples are used.

[5d] - Describe the types of tape and adhesives used in HVACR work.

[5e] - Describe the types of tie straps used in HVACR work.

[6a] - List common units used in the inch-pound system.

[6b] - Explain how linear, area, volume, and liquid volume measurement work.

[6c] - Describe how the area and volume of round objects is calculated.

[6d] - Explain how weight measurement, compound measurement, and rate measurement work.

[6e] - Explain the basic concept of the SI system.

[6f] - Describe how to use a meter stick.

[6g] - Estimate length and area based on standard building material dimensions.

[7a] - Explain the law of conservation of matter and give an example.

[7b] - Describe the structure of matter.

[7c] - Discuss the unique characteristics of the three states of matter.

[7d] - Define critical point and triple point.

[7e] - Explain the difference between weight, mass, and volume and typical units of measurement.

[7f] - Explain the importance of testing standards.

[7g] - Demonstrate how to calculate the density, specific volume, and specific gravity of a material, and discuss how this information is used.

[7h] - Identify the common changes of state and the temperature at which they occur.

[8a] - Explain the relationship among energy, work, and power.

[8b] - Explain the difference between potential and kinetic energy.

[8c] - Describe common forms of energy.

[8d] - Distinguish between nonrenewable and renewable energy sources.

[8e] - Perform energy-conversion calculations and describe the law of conservation.

[8f] - Diagram the electrical distribution system and explain natural gas distribution.

[8g] - Describe standard and SI units of work and power.

[8h] - Describe energy efficiency measurements.

[9a] - Define temperature and radiant energy and explain the effect temperature has on a substance.

[9b] - Describe common types of thermometers.

[9c] - Compare and contrast the four types of temperature scales: Fahrenheit, Celsius, Rankine, and Kelvin.

[9d] - Describe how to convert temperatures.

[9e] - State the first and second laws of thermodynamics.

[9f] - Compare and contrast the three basic methods of heat transfer and explain the factors that affect the rate of heat transfer through various materials.

[9g] - Compare sensible heat to latent heat.

[9h] - Describe how to calculate heat change.

[9i] - Differentiate between saturated, superheated, and subcooled refrigerant.

[10a] - Explain the concept of pressure and how pressure is expressed.

[10b] - Explain the relationships among atmospheric pressure, gauge pressure, and absolute pressure.

[10c] - Convert pressures to different scales.

[10d] - Describe how gas responds to changes in temperature, volume, and pressure.

[10e] - Solve for new pressure, temperature, or volume using the ideal gas law.

[10f] - Describe how a saturated gas behaves.

[11a] - Explain the fundamental principles of the compression–refrigeration cycle.

[11b] - Describe the relationships within the refrigeration cycle.

[11c] - Describe how heat flows in the refrigeration cycle.

[11d] - Discuss the difference between the compression refrigeration cycle and the absorption refrigeration cycle.

[11e] - Explain the fundamental principles of evaporative cooling.

[11f] - Explain the basic operation of thermoelectric refrigeration.

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HVACR 2 (Second Semester)

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[12a] - Explain the fundamental principles behind the refrigeration cycle and identify the system’s four major components.

[12b] - Identify where in the refrigeration system the refrigerant is saturated, superheated, or subcooled.

[12c] - Draw a basic compression refrigeration cycle and identify the pressure, temperature, state, and heat content in and out of each component.

[12d] - Name the three main refrigeration system interconnecting lines.

[12e] - Describe how refrigerant is stored in the refrigeration system.

[12f] - Describe optional components in the refrigeration system.

[13a] - Describe how compressors are classified.

[13b] - Discuss the difference between positive displacement and dynamic displacement compressors.

[13c] - Describe the differences between open, hermetic, and semi-hermetic compressor enclosures.

[13d] - Explain how each type of compressor works and give example applications for each.

[13e] - List the three types of compressor motor cooling and discuss their application.

[13f] - Discuss the effect evaporator saturation temperature has on compressor selection.

[13g] - Explain the purpose of capacity control and describe how capacity control is achieved.

[13h] - Describe how compressors are lubricated.

[13i] - Explain how compression ratio is calculated.

[13j] - Explain common compressor problems.

[13k] - List the steps required for a compressor changeout.

[14a] - Describe the three changes refrigerant goes through in the condenser.

[14b] - Describe the types of air-cooled condensers.

[14c] - Explain the purpose and methods of achieving low ambient control.

[14d] - Discuss factors involved in servicing air-cooled condensers.

[14e] - Describe the types of water-cooled condensers.

[14f] - Discuss aspects of condenser water management.

[14g] - Describe how evaporative condensers work.

[14h] - Discuss factors involved in servicing water-cooled condensers.

[14i] - Calculate the heat of rejection and list ways condenser heat can be used.

[15a] - Describe types of metering devices, how they operate, and where they are located.

[15b] - Discuss the application of fixed metering devices and common fixed metering device problems.

[15c] - List types of modulating metering devices and explain how they differ from fixed metering devices.

[15d] - Explain the operation of thermostatic expansion valves.

[15e] - Explain the purpose and operation of liquid distributors.

[15f] - Discuss factors affecting thermostatic expansion valve application.

[15g] - Describe how to measure and adjust TEV superheat.

[15h] - List common problems encountered by thermostatic expansion valves and suggest ways to remedy them.

[15i] - Describe the operation of electronic expansion valves.

[16a] - Discuss the concepts of sensible and latent cooling as they relate to evaporators.

[16b] - Discuss the ways in which evaporators are classified.

[16c] - Describe direct-expansion and flooded evaporators.

[16d] - Describe how evaporators are constructed.

[16e] - Describe factors affecting air conditioning evaporator operation.

[16f] - Explain the purpose of the condensate drain trap in air-conditioning evaporators.

[16g] - Describe the operation of commercial refrigeration evaporators.

[16h] - Describe the types of water-cooling evaporators.

[17a] - Explain the functions of the components located in the compressor discharge line.

[17b] - Describe how to control refrigerant flow through heat reclaim coils, condensers, and receivers.

[17c] - Explain the functions of the components located in the liquid line.

[17d] - Explain the functions of the components located in the compressor suction line.

[17e] - List the different types of isolation valves used for refrigeration systems.

[18a] - Explain how refrigerants were developed through the generations.

[18b] - Explain the refrigerant safety rating system.

[18c] - Describe the different types of refrigerant chemical composition.

[18d] - Explain the difference between compounds, zeotropes, and azeotropes.

[18e] - Describe the relationship between refrigerants and the ozone and global warming.

[18f] - Describe naming and numbering conventions of refrigerants.

[18g] - Match refrigerants with the proper refrigeration oil.

[18h] - Describe the characteristics and applications for refrigerants.

[19a] - Identify the lines and scales on a PH (pressure-enthalpy) diagram.

[19b] - Draw a PH diagram of a basic refrigeration cycle.

[19c] - Explain how refrigerant heat, pressure, and temperature change throughout the seven stages of transformation within a refrigeration system.

[19d] - Calculate the pounds of refrigerant flowing through a system for a given set of operating conditions and capacity.

[19e] - Describe the measurements required to plot an operating system on a PH diagram.

[20a] - Demonstrate how to obtain and read a refrigerant SDS.

[20b] - List the personal protection equipment (PPE) for handling refrigerant.

[20c] - Describe proper first aid in the event of a refrigeration accident.

[20d] - Explain the refrigerant safety rating system and list the safety hazards associated with handling refrigerants as applied to ANSI/ASHRAE Standard 34-2019.

[20e] - Explain the differences among refrigerant cylinders and how to properly dispose of a DOT 39 refrigerant cylinder.

[20f] - Explain the requirements for machinery room refrigerant leak detection and excess pressure protection as applied to ANSI/ASHRAE Standard 15-2019.

[20g] - Describe the operation of machinery room refrigerant detectors.

[21a] - List the different types of thermometers and explain the advantages and disadvantages of each.

[21b] - Describe how to take accurate temperature readings.

[21c] - List the different types of pressure gauges and explain how gauge accuracy is stated.

[21d] - Explain the operation and use of a gauge manifold set.

[21e] - Describe the advantages of digital system analyzers.

[21f] - Discuss the advantages of short gauges and smart probes.

[21g] - List the types of positive shutoff available.

[21h] - Explain why a micron vacuum gauge is used to measure vacuum instead of a compound gauge.

[21i] - Describe the different types of refrigerant leak detectors.

[21j] - Describe how digital charging scales are used.

[22a] - List the pipe and tubing materials used for air conditioning and refrigeration.

[22b] - Describe the characteristics of iron and steel pipe.

[22c] - Describe how to join, cut, and thread iron and steel pipe.

[22d] - Discuss the characteristics of copper tubing and sweat fittings.

[22e] - Discuss how to cut, bend, and join copper tubing.

[22f] - Describe how to join copper tubing using flare fittings.

[22g] - Describe press fittings and how they are used.

[22h] - Describe different types of plastic pipe and how to cut and join it.