Perform correct use and maintenance of refrigerant handling equipment according to equipment manufacturer’s standards

Lesson Plan for

AUT 188-189/AUT 293

Automotive Service Technology Section D/Automotive Special Problems

Course HS Title: / Automobile Service Technology/Special Problems / Program:
KCTCS Courses included in HS Title: (Lesson is prepared for course highlighted.)
KCTCS Course No. / KCTCS Course Title
Introduction/Context / This lesson will instruct the student on how to perform correct use and maintenance of refrigerant handling equipment according to equipment manufacturer’s standards. Knowledge of these techniques and the skills required to correct problems associated with this task are necessary for a student to acquire if they wish to compete for high paying, high skilled jobs in an Automotive Repair Facility. Entry level technicians need to be able to perform this task to 100% accuracy. Incorrectly performing this task can lead to an automobile accident or create customer satisfaction issues.
Prepared By / School / Date:
Grade Level / No. Students / No.IEP's: / Lesson Length:
Task
Perform correct use and maintenance of refrigerant handling equipment according to equipment manufacturer’s standards
No. / Objective
1 / Given the proper tools and instruction, the student will be able to perform correct use and maintenance of refrigerant handling equipment according to equipment manufacturer’s standards and pass a written test covering the task with 100% accuracy.

Connections:

Skills Standards:
OH 001
OH 002
OH 003
OD 002
OD 003
OD 005
Common Core Technical Standards:
TD-SYS-2
New Common Core Standards:
RST 11-12.2
RST 11-12 3

INSTRUCTIONAL MATERIALS/TECHNOLOGY

Teacher Designed Materials and Other Handouts

Textbooks and Workbooks

Author / Title/ISBN No. / Edition / Publisher / Pages
Motor Information Systems / ASE Test Preparation Guide / 2009 / Prentice Hall/Pearson / 484-485
Chris Johanson / Auto Heating and Air Conditioning / 2004 / Goodheart Wilcox / 34-35


Web Addresses

Title / Publisher / URL
Today's Class / Melior / www.todaysclass.com


Equipment

Quantity / Item / Source
As Needed / Recovery Recycling Machine (R12 and R134A) / Various


Content/Presentation/Demonstration Outline

Explain to students that recovery and recycling stations capture, filter, and store the refrigerant evacuated from a system for reuse. Typically, recycling salvages about 65 percent of the refrigerant charge. Let them know that recovery and recycling stations are available for R-12 and R-134a refrigerants. There are also dual stations that are available that can process both R-12 and R-134a. However, tell students that these are two units combined into one cabinet, and a single station cannot process both types of refrigerant.
Inform students that mixing R- 12 with R- 134a, or any other refrigerant blend, contaminates the recycling station and results in costly repairs. Tell students to use a refrigerant identifier to verify what refrigerant is in the system being serviced before hooking up service equipment.
Instruct students that The Federal Clean Air Act, Section 609, requires that anyone who performs a service involving refrigerant on an automotive A/C system must be certified to do so. Explain that certification forms can be obtained from the manufacturers of UL-approved refrigerant recovery/recycling equipment. The equipment should have a label saying it is UL-approved and meets SAE standard J1991.
To qualify for certification, tell students that a shop must have UL-approved recovery and recycling equipment and the technician must be able to show proof of training on the use and maintenance of the equipment. Let them know that the certification form requires the equipment serial number and the signature of the equipment owner or a responsible officer, in addition to the name and address of the technician. Tell students to remember that without this certification, it is illegal to perform any refrigerant service.
Inform students that The Society of Automotive Engineers (SAE) established three standards, J1989, J1990, and J1991, concerning refrigerant recycling, which the U.S. government incorporated into laws. Tell them that Recycled R-l2 is defined by SAE Standard 11991, and manufacturers must make sure their equipment meets this standard, and all applicable recycling equipment standards.
Instruct students that Standard J1990 also applies to equipment manufacture, but contains guidelines that technicians should be aware of, such as the requirement that the tank be tested every five years. Explain that this standard also specifies that service hose shutoff valves must be within 12 inches of the hose ends to prevent unnecessary refrigerant release.
Let them know that the equipment must also be able to separate refrigeration oil that comes out of a system during refrigerant discharge and be able to indicate the amount of oil lost, so the technician can replace it in the system. Tell students that Standard J1989 applies directly to the service technician, establishing guidelines for recovery and recycling equipment use.


Applications/Practice

1 / Refer to content


Evaluation and feedback Prior to Testing or Lab Work

1 / Objective 1. / Formative assessment / Instructor will observe students as they practice the procedure to assure correct procedure and safety practices are being followed. A checklist will be utilized to chart student progress on the task. Questioning techniques will be utilized as necessary to demonstrate student comprehension / Adaptations and/or accommodations for special needs students will be added if required.


STUDENT ASSESSMENT:(Assess student progress with performance criteria.)

1 / Objective 1 / Summative assessment / written test questions on stated objective / adaptation and / or accommodations for special needs students will be added if required
IMPACT--Reflection/Analysis of Teaching and Learning: (How did students’ progress in relation to the state objectives? Was the instruction successful? Analyze samples of student work particularly that which is unsatisfactory, for the purpose of planning further instruction.)
REFINEMENT--Lesson Extension and Follow-up: (To be filled in as the lesson is modified during initial planning and/or during the teaching learning process.)