Year3

Year 3 Apprenticeship

Costs:

Apprenticeship Program Year 3

Year 3

$1292.00

Required Books

 

$141.95

Delmar 6th Edition
Refrigeration & AC Technology

 (Check to see if you already have the above book. Must be 6th edition)
*Does not include shipping and handling

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Year 3 (156 hours of instruction)

Year 3 Program Learning Objectives

Year 3

1. The apprentice will demonstrate new knowledge in the subjects of: Basic Sheet Metal, Basic Air Conditioning and Refrigeration, Systems Air and Duct Sizing, Intro to Hydronics, Intro to Service, and Basic Controls; by earning an overall average score of 75% or higher in the combined year’s curriculum.

2. The apprentice will actively participate in the programs discussion forums, as confirmed by the forum logs and discussion grades, by earning an overall average score of 75% or higher in the combined year’s curriculum.

Basic AC & Refrigeration (30 hours)

  • Basic Refrigeration Cycle Physics

This is the first module in a series that make up the course on the "vapor compression" refrigeration cycle and the components that make it happen. In this module you will look over the physics of the cycle and begin to relate them to how it is used to move heat energy from one place to another. Study well, your understanding of this process is key to your success in the field as a technician.

  • Condensation and Condensers

Once again the definition of refrigeration is moving heat energy from where you don’t want it to a place that doesn’t matter. The condenser is the part of the cycle that puts the heat energy where it doesn’t matter, usually in the outside air or into water. In some cases the heat is "reclaimed" and put where it is wanted. In this module we will discuss the "reject the heat" part of the cycle and the component (condenser) that does the job.

  • Expansion and Metering Devices

There have been many types of devices used for metering refrigerant in the past, but there are only a small handful of devices in common usage today. We will look at some of the more prevalent "old-timers" because you may still run into them, but most of our attention will be devoted to the modern types of refrigerant metering devices. These are the capillary tube, piston (by-pass or fixed) and thermal expansion valve .

  • Evaporation and Evaporators

Evaporation: causing something in the liquid state to change into the vapor state. What really happens in the evaporation process? You should have the answer after completing this module. The other concept that you will be learning about is the evaporator side of the refrigeration cycle. The evaporator is the "work" end of the system or the "application". What do I mean? You can answer that yourself after finishing the module.

  • Compression and Compressors

The compressor is often called the "heart" of the refrigerant system because, in the same way that a human heart circulates blood through veins and arteries, the compressor provides the pressure differential that causes the refrigerant to flow through the system tubing and coils.
The compressor is the "other" division point between high and low side pressures (the metering device was the high pressure to low pressure drop). The compressor is the point that the low pressure gets boosted to the high pressure. This is where the "work" gets done in the system.

  • Measure the Normal Cycle

Through the use of an animation, students follow instructions and answer questions related to the heat/cool cycle.

System Air Flow & Duct Sizing (30 hours)

  • Heat Energy and Comfort

This module is the beginning of your understanding of the actual "Conditioning" of air. In this lesson we will look at how temperature conditions affect the comfort of humans. If you understand the conditions that most humans are comfortable in, you can create them. We are in the business of controlling the temperature and humidity of the air around our customers

  • Properties of Air

This module is important to you! We are going to discuss the properties of air. Just like any other "fluid" substance, air has weight, volume, specific heat and other properties that need to be considered when trying to "condition" it. In this module I am going to try to impress upon you the value of visualizing those properties while doing your work. Applications will be provided.  The problem I have seen with many technicians is that if you can’t see something (like air), it loses its importance in the big picture. Nothing could be farther from the truth in HVAC. Air is the material that we use all the time to transfer heat to provide comfort to our customers or our customers’ equipment. Even if you don’t see it, that doesn’t mean it isn’t there.

  • Psychrometrics

In the last module we learned about the hard data associated with air; the density, specific heat, specific volume, and other properties. These are things that you must be aware of to further study air, how we use it and condition it. In this module we are going to apply that knowledge plus more to further calculate and understand air functions.  The psychrometric chart is on our agenda for this session. We will learn to use it to find the properties of air that we have learned about. With those properties, we can then calculate what has been done or what we want to do when using air as the medium of heat transfer for comfort.

  • Total Heat in Air

In the last module we learned how to plot and find values on the psychrometric chart. All of the calculations were oriented towards sensible heat processes. In this module we are going to continue with that exercise but deal with changes in latent heat as well. This calculation is called "Total Heat" on the psychrometric chart.  Total heat is calculated whenever there is a process that removes or adds moisture to the air. Applications would include a heating system with a humidifier or a cooling system using a mechanical refrigeration system. As you should know (at this point), you are adding sensible plus latent heat of evaporation (with the humidifier) or removing sensible plus latent heat of condensation (with the AC unit). These processes need to be calculated to achieve proper equipment sizing that will maintain comfort. In the previous module you learned the sensible part. Now, on to the latent part. We are in the comfort business!

  • Measuring a Heavy Invisible Moving Volume

At this point we have exercised the psychrometric chart enough for the moment. Now we need to use the information we can get from the chart and apply it to something different. That would be measuring airflow. A technical skill that isn’t too hard to accomplish but requires a certain amount of knowledge before you can be successful.  In this module you will be exposed to the various "common" measuring instruments that a technician may have (or get) to work with for air measurement. At the same time we are going to discuss the actual techniques used for each one of them to find the elusive accurate CFM of an operating system. This ability is key to your success in determining whether the system is operating correctly or not. Without knowing CFM, it is difficult to know anything else.

  • Moving and Grooving with Air

This is another (and final) round on the measurement of airflow. The subject deserves to be understood as completely as possible by a technician. With an adequate level of ability in checking airflow, the average technician quickly becomes above average when it comes to system diagnostic skills.  With this module I plan to get your understanding of air far enough so that you can concentrate on building and using those skills on a daily basis in the work place.

Introduction to Hydronics (6 hours)

  • What is Hydronic Heating

In this module we will take a brief look at the history of radiant heating and discuss what hydronic heating means. We will start delving into the major parts of a hydronic system. We will also discuss the advantages and disadvantages of installing a radiant heating design in a building (as compared to the standard forced-air furnace and related ductwork).

  • Materials and Tools

Now that you are familiar with hydronic heating, we will continue  with a module on materials and tools. The focus of this section will be on piping materials, hanging methods, joining procedures and the tools required. We will cover the main types of pipe used in residential/light commercial hot water heating systems. As well, we will discuss the various types of valves you will encounter/use in your installations. You will learn their applications and installation practices. This is a lengthy module but I think necessary to relay the pertinent information to you.

Introduction to Service (12 hours)

  • Air Filtration

Objectives:

  • Recognize and identify common types of air filter media
  • Discuss the importance of installing filters correctly without air leaks past the filter and filter access covers.
  • Be familiar with the MERV air filter rating scale and common applications that rated filters are used in
  • Recognize and install air filters in the proper orientation (direction of flow)
  • Understand the relationship between a clean system and energy efficiency
  • Explain how to clean an Electronic Air Cleaner
  • Preventative Maintenance

Review the following files on Preventive Maintenance and be prepared to explain procedures to be followed.
1. Preventative Maintenance PowerPoint
2. Trane Gas Furnaces
3. Carrier Gas Furnaces
4. Gas Furnace Preventative Maintenance Checklist & Worksheet

  • Gas Furnace Maintenance

Students will learn to follow procedures for Service Calls:

  • Be aware of Planned Service Checklist items
  • Pre Service Check with Customer
  • Thermostate Check
  • Blower Compartment Checks
  • Direct Drive Blower Check
  • Belt Drive Blower Check
  • Gas Heating Checks
  • Post Service Checks

Basic Controls (36 hours)

  • Building Control Systems

After studying this module, you should be able to:
Define what Building controls are and how they are used.
Define the controlled sub-systems of a building
Describe the methods of heating, cooling and dehumidifying modern buildings

  • Air Circulation and Air Quality

After studying this Module you should be able to Describe the methods of Humidification, Ventilation and Air Filtration in modern buildings

  • ControlSystem Characteristics

After studying this module, you should be able to
To understand the terminology used in the HVAC Controls world
Describe what a Control Loop consists of and give examples
Explain the difference between Analog and Digital Devices

  • Process Characteristics and ControlSystems

After studying this module, you should be able to
To understand the terminology used in the HVAC Controls world
Demonstrate knowledge of Analog and Digital I/Os
Explain the characteristics and differences of the types of control systems

  • Control Systems Components

After studying this module, you should be able to:
To understand the terminology used in the HVAC Controls world
Describe what a Control Loop consists of and give examples
Explain the difference between Analog and Digital Devices

  • Control Systems

After studying this module, you should be able to
To identify complete control systems such as Electric, Electronic,     Pneumatic and Microprocessor-based / DDC Control Systems
To distinguish the advantages and disadvantages of these systems

Basic Sheet Metal (42 hours)

  • Types of Sheet Metal and Their Uses

Students will learn:
The historical significance of metal
Metalworking in early America and sheet metal work today
Metal processes and terms
Metals and ways to identify them by sight and feel
Metals used in sheet metal work
Types of metal gauges and their uses
Trade tables and their uses
Safe handling of large sheets of metal

  • Assembling, Connecting, and Fastening Sheet Metal Components

Students will learn:
Terms
Types of seams and their applications
Types of locks and clips and their applications
Types of edges and their applications
Types of notches and their applications
Types of screws and their characteristics
Types of bolts and machine screws and their characteristics
Types of washers and their characteristics
Types of nuts and their characteristics
Types of rivets and their characteristics
Non-mechanical fastening materials, devices, and processes

  • Sheet Metal Tools and Their Uses

This Module will introduce you to many of the tools which are used in HVAC sheet metal work. There are hand tools, power tools, and foot operated tools. Some are portable and some are stationary; mounted either on a bench or on the floor. Some are designed specifically for use in sheet metal work and some are common tools with a specific use in sheet metal work. Learning to use the various tools takes not only knowledge of the uses of the tools but practice in using them correctly and safely. Improper use can result in injury or damage to the tools.
Learning to use sheet metal snips with such a degree of skill that cut edges are left smooth and clean and free of burrs and fishhooks is particularly important. Burrs and fishhooks are slightly irregular edges made on sheet metal when cutting snips are improperly used; often resulting in irregular edges that turn up and roll into a fishhook shape. You will have a much clearer understanding of fishhooks after you get one or two of them in your fingers.
Take time to browse through catalogs such as at www.malcoproducts.com or www.roperwhitney.com. If you are not working in the industry find an HVAC or sheet metal company where you can see what the tools really look like and observe the tools in use. Your skill with the various tools will improve with practice.
Be sure and watch the video in your reading assignment. It will give you a good idea of how many of the tools are used.

  • Sealing, insulating and Lining Sheet Metal Ductwork

In this module, students will learn:
Ductwork systems and terminology
Sealing and insulating sheet metal ducts
Duct liner and its characteristics
Installing duct liner
Duct wrap and its characteristics
Installing duct wrap
Duct system efficiency depends upon the installer

  • Specifications, Symbols and Codes

This module will:
Review blueprints and specifications;
Cover layout symbols and abbreviations; and
Discuss standards and codes and how they are enforced.

  • Introduction to Sheet Metal Duct Layout and Fabrication

By the time you complete this module you should be able to:
Define drafting and geometric terms pertaining to sheet metal layout.
Describe the sheet metal and drafting layout tools and their uses.
Construct simple geometric figures.
Sketch a simple fitting.
Describe two view, three view, and stretch out drawings.

  • Methods of Layout and Development

After completion of this module the technician should be able to:
Identify and define terms used in methods of development.
Describe why the true length of a line and the true shape of an object are sometimes not obvious.
Describe the process of transfer pattern development used to determine layouts for sheet metal fittings.
Use the process of transfer pattern development for the layout of selected sheet metal fittings.
Describe the principles of parallel line development used to determine layouts for sheet metal fittings.
Use the principles of parallel line development for the layout of selected sheet metal fittings.
Describe the principles of radial line development used to determine layouts for sheet metal fittings.
Use the principles of radial line development for the layout of selected sheet metal fittings.
Describe the principles of triangulation used to determine layouts for sheet metal fittings.

Use the principles of triangulation for the layout of selected sheet metal fittings.

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