ONLY PREVIEW - Transit Training HVAC Motor Preventive Maintenance and Inspection ... • List safety

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  • Course 106

    HVAC Systems

    Introduction and Overview

    Module 1: Overview of Rail Car HVAC and

    General Safety Procedures

    INSTRUCTOR GUIDE

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  • 106 Inspection and Maintenance of HVAC Systems Module 1 Instructor Guide

    Intended For Use by Rail Car Training Consortium Members Only ● ©Transportation Learning Center Page 2

    Table of Contents

    CHECKLIST FOR INSTRUCTION ................................................................................................................................ 3

    SUPPLIES, AUDIO-VISUAL EQUIPMENT, INTERNET ACCESS .................................................................................... 3

    BEST PRACTICES FOR DELIVERING TRAINING ......................................................................................................... 4

    OVERVIEW TO COURSE 206 ................................................................................................................................... 5

    MATERIALS FOR INSTRUCTION .............................................................................................................................. 5

    COURSE 206 ASSESSMENTS ................................................................................................................................... 5

    OVERVIEW TO MODULE 1 ...................................................................................................................................... 6

    Videos, Handouts, Job Aids, Take-aways ............................................................................................................. 6 Outline of PowerPoint Presentation ..................................................................................................................... 6 Learning Objectives for Module 1 ........................................................................................................................ 6 Overview .............................................................................................................................................................. 7 Motors in HVAC .................................................................................................................................................. 11 Phases of Power ................................................................................................................................................. 13 Major Components of DC and AC Motors .......................................................................................................... 17 Thermal Overload Relay Protection ................................................................................................................... 24 HVAC Motor Preventive Maintenance and Inspection ....................................................................................... 29 Field Trip ............................................................................................................................................................. 39 Summary and Quiz ............................................................................................................................................. 40

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  • 106 Inspection and Maintenance of HVAC Systems Module 1 Instructor Guide

    Intended For Use by Rail Car Training Consortium Members Only ● ©Transportation Learning Center Page 3

    Checklist for Instruction  Confirm the training dates, location, and number of participants.  Ensure you have all materials listed in the section Materials for Instruction.  Ensure you have all that is listed in the section Supplies, Audio-Visual

    Equipment, Internet Access.  Read and study the Instructor Guide, PowerPoint presentation, and any State or

    local documentation pertaining to the local environment.  If using case studies, review ahead of time and select the most appropriate

    cases studies for your audience.  Familiarize yourself with the Participant Guide or coursebook.  Collaborate with local host/coordinator to determine who will print the following

    (available on website):  Certification of completion for each participant.

    Supplies, Audio-Visual Equipment, Internet Access The following is important for the adequate delivery of this course:

     LCD projector compatible with a notebook computer and cables for proper connection

     Computer with software to run Microsoft PowerPoint  Electronic remote device to advance slides in PowerPoint presentation, if

    available  Projection screen (at least 6’ x 6’)  Pointer (preferably laser type)  Twenty-foot or longer extension cord  Dry erase board with dry erase markers and eraser, if available  Flip chart with markers  Supplies such as pencils, note pads, markers, highlighters.  Access to lab, rail car shop, rail car for hands-on lessons  You may need Internet access.

    All equipment should be placed and tested in the room. The instructor should check at least one hour prior to the first day of the course.

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  • 106 Inspection and Maintenance of HVAC Systems Module 1 Instructor Guide

    Intended For Use by Rail Car Training Consortium Members Only ● ©Transportation Learning Center Page 6

    Overview to Module 1 • Duration of this module: 185 minutes (3 hours including field trip) • PowerPoint slides: 27 • This module has a quiz.

    Videos, Handouts, Job Aids, Take-aways

    Links to one (1) Vimeo video is made available to enhance participants’ learning:  Video – Rail HVAC Overview

    The Instructor should bring the following materials/equipment if applicable:  Property-specific Safety Data Sheets.  Property-specific Personal Protection Equipment  Property-specific Lockout/Tagout Kits  Property-specific “job cards”

    Outline of PowerPoint Presentation

    Topic Title Slides Duration (Minutes) Overview 1-4 5

    5-6 10 7-9 10 10-14 25 15-18 15 19-24 45

    Field Trip 25 60 Summary and Quiz 26-27 15

    185 minutes (3 hours including Field Trip)

    Learning Objectives for Module 1

    Following the completion of this module, the rail car technician should be able to: • Demonstrate knowledge of Clean Air Act of 1990, EPA 608 Certification,

    Refrigerant Hazards and Proper Handling Techniques • Explain types and use of Personal Protective Equipment (PPE) when dealing with

    HVAC systems • List safety rules related to HVAC maintenance

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  • 106 Inspection and Maintenance of HVAC Systems Module 1 Instructor Guide

    Instructor Notes

    Intended For Use by Rail Car Training Consortium Members Only ● ©Transportation Learning Center

    Page 11

    Motors in HVAC

    Slide 5

    Inspection and Maintenance of HVAC Systems

    Rail Car HVAC Motors

    5 Electric Rail Car HVAC Motors

    Evaporator Blower Motor

    Compressor Motor Assembly

    Thermo King Evaporator Blower Motor

    Thermo King Condenser Blower Motor

    INSTRUCTIONAL ACTIVITY: Overview of HVAC Motors in transit rail TIME: 5 minutes INSTRUCTION METHOD: Lecture SAY: Electric motors are used to turn the prime movers of air, water, and refrigerant, which are the fans, pumps, and compressors. These motors provide the speed, torque, and horsepower necessary to operate the application. The motor changes one form of energy (electrical) to rotational or linear motion (mechanical). AC and DC motors are the two major types in use today that are related to the industrial HVAC applications. In rail car HVAC units, AC motors are generally used in newer equipment. Some systems have retrofitted their motors from DC to AC in recent years. To understand the differences of AC and DC motors, it is important to first review different phases of power. PARTICIPANT GUIDE (COURSEBOOK) PAGE REFERENCE: __ ADVANCE SLIDE

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  • 106 Inspection and Maintenance of HVAC Systems Module 1 Instructor Guide

    Instructor Notes

    Intended For Use by Rail Car Training Consortium Members Only ● ©Transportation Learning Center

    Page 17

    Major Components of DC and AC Motors

    Slide 10

    Inspection and Maintenance of HVAC Systems

    Components of DC Motors

    10

    • Armature • Field Winding • Commutator • Brushes

    INSTRUCTIONAL ACTIVITY: Explain definition and components of a DC motor TIME: 5 minutes INSTRUCTION METHOD: Lecture SAY: A DC motor is any of a class of electrical machines that converts direct current electrical power into mechanical power. The two major components of a DC motor are the armature (top figure) and field winding. The armature is the rotating part that is physically connected to the shaft and develops magnetic flux around its windings. The field winding is the part of the stationary frame and provides the flux necessary to interact with the armature flux to produce rotation. The commutator (Bottom right figure) acts as an electrical switch and always ensures that a repelling force is present between the armature and field flux circuits. This repelling force against the field winding flux causes rotation of the armature. Brushes (Bottom left figure) are the devices that physically connect the voltage supply to the armat

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