SYLLABUS For BASIC TRADE COURSE (360 Hours) On REFRIGERATION AND AIR CONDITIONING

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1 SYLLABUS For BASIC TRADE COURSE (360 Hours) On REFRIGERATION AND AIR CONDITIONING

2 INDEX 1. Introduction 3 2. Objectives 3 3. Employment Opportunity 4 4. Course Structure 4 5. Entry Qualification 4 6. List of Competencies 5 a) Basic Competencies 5 b) Common Competencies 5 c) Core Competencies 5 7. Content 6 d) Basic Competencies 6 e) Common Competencies 9 f) Core Competencies Job List Tools and Equipment List Book References 19

3 INTRODUCTION: Now a day over population is not our curse, but it is a main resource of our country. Man does not get more than his effort. For perfect implementing the efforts depend on motivation, proper media and precise field. There is no alternative for increasing national income and development without kljhasfdkja lities and value of production of industry and factories, exporting skilled manpower to abroad which is depend on technical training and related sections. Only technical (Vocational) training can produce skilled manpower by applying good management and modernization of training program. A syllabus has prepared by Bangladesh Technical Education Board on Refrigeration and Air Conditioning-1 for fulfillment of this need. Right environment and management (like Trainees, Trainers, Building, Tools & Equipments, Materials, and Management etc.) are essential for implementing this syllabus. In this case some topics has changed and included form the existing one. Some more and modern topics has included in the new one. Trainees will convert into trained manpower by proper utilizing this syllabus. Bangladesh Technical Education Board has recognized this syllabus on the /../2008 through precise process for converting human resource into skilled manpower. After completing this course the trainees achieve that will enable to install, service, maintain, trouble shoot and repair refrigeration and air-conditioning small units. Bangladesh Technical Education Board will control the assessment of the trainees and give certificate to the trainees after completing the course. OBJECTIVES: To provide basic knowledge and skills on Refrigeration and Air-conditioning. To provide understanding and skill on tools and equipments used in RAC work. To provide ability listing, Selecting and handling Tools, Meters and equipments and materials used in RAC work. To provide knowledge and skill on related Mechanical drawing in RAC works. To provide knowledge and skill on Mechanical aspects of Refrigeration and Air-Conditioning system. To provide knowledge and skill on Basic Electrical and Electronics Equipments and Materials used in RAC works. To assemble an Electrical and Electronic circuits used in RAC from its components. To provide knowledge and skill on unitary Appliances of Refrigeration and Air-Conditioning system. To develop skill on Installation, Servicing and Repairing of RAC appliances. To develop skill on Trouble shooting. To develop abilities to place order and procure the requisites for RAC works. To develop abilities to use the manufacturers manuals and brochures.

4 Employment opportunities: 1. Government Service. 2. Semi Government Service. 3. Corporation. 4. Private sectors. 5. NGO. 6. Abroad. 7. Self employment. COURSE STRUCTURES: Name of Course Duration of Course Entry Qualificatio n on Basic Refrigeration and Airconditioning-1 Total 360hrs Theory = 90 Practical = 240 Communicative English = days per week Per day 03 hours Theory = 01h per lesson Practice = 02 hrs per Practice Total = 03 hrs per working day Minimum SSC Appeared/E quivalent Entry Qualification Minimum: SSC appeared/equivalent. LIST OF COMPETENCIES This course is also designed to enhance the basic and common knowledge, skills and attitudes of an individual in the field of Refrigeration and Air-Conditioning. a) Basic Competencies: 1. Receive and respond, Participate and Lead to workplace communication. 2. Work with others, Team environment and Lead Teams. 3. Demonstrate work values, practice career professionalism and develop & practice negotiation skills. 4. Practice housekeeping procedures, Occupational health and safety procedures and Solve problems related to work activities. 5. Use Menstruation & required calculation in relevant trades. 6. Personal manner.

5 b) Efficiently communicate in English 1. Speak in English with confidence. 2. Communicate with target person 3. Understand the speech of English Users. 4. Achieve better professional performance. Common Competencies: Recognize tools, equipments and materials used in RAC 1) Prepare a list of Tools, equipments and meters of Refrigeration and air-conditioning works. 2) Prepare a list of main parts of vapor compression refrigeration system. 6. Work with others, Team environment and Lead small Teams: a) Develop effective workplace relationship. b) Contribute to work activities. 7. Demonstrate work values, Practice career professionalism and Develop and Practice negotiation skills: a) Define the purpose of works. b) Apply work values/ethics. c) Deal with ethical problems. d) Maintain integrity of conduct in the workplace. 8. Practice housekeeping procedures, Occupational health and safety procedure and Solve problems related to wok activities: a) Sort and remove unnecessary items. b) Arrange items. c) Maintain work areas, Tools and equipments. d) Follow standardizes work process and procedures. e) Perform work spontaneously. f) Demonstrate the importance of earthing system of electronic components. 9. Use Menstruation & required calculation n relevant Trades: 10. Personal Manner: a) Show the good manner. b) Own responsibility of practical works. c) Own duties of practical works. d) Maintain sequence of steps of practical works. e) Respect to the honorable person (Sir, Senior Trainees). f) Cooperation & Thanking to each other about practical works. g) Learning by observation of practical works. h) Explain routinely speaking and messages in a workplace. i) Follow routinely speaking & message. j) Perform work duties following written notices.

6 Know about tubing and Piping used in RAC works 1. List fittings used in RAC works. 2. Cut (with hack saw) and File metal bar or rod. 3. Cut and thread GI pipe. 4. Cut and ream copper tube. 5. Bend copper-tube in different shapes. 6. Flare and swag copper tube. 7. Make gas flame. 8. Braze copper to steel and steel to steel tubes. Check and make decision about performance of compressor 1. Test performance (pressure) of compressor. 2. Cut and disassemble Hermetic Type compressor. 3. Check and clean Part of Hermetic Type compressor. 4. Re-assemble all the parts and Weld the dome of Compressor. Recognize electrical circuits used in RAC works and their functions 1. Name electrical components of RAC works. 2. Make and compare series and parallel circuits. 3. Make electrical test board. 4. Make electrical open circuit for calling bell. 5. Make electrical open circuit for Tube light. 6. Prepare electrical open circuit for air conditioning unit. 7. Make and test DC power supply circuit and Flip-flop circuit. 8. Connect the earthlings point of the RAC unit. 9. Test completed electrical Circuit before supply. Test winding and find terminal of components used in RAC machines 1. Test and find terminals of Timer & Selector switch. 2. Test winding of Compressor Motor. 3. Find winding terminal of compressor and lower fan motor. 4. Find Faults of electrical circuit. Core Competencies: 1. Install RAC small units (especially Window AC, Slt Type Ac and Car Ac) 2. Service and maintain RAC small units. 3. Shoot troubles of small units. 4. Recover compressor oil in compressor. 5. Recover & recycle refrigerants in RAC units. 6. Test performance and commission for unitary system. 7. Repair & maintain components used in RAC works. 8. Repair & maintain electrical components used in RAC work.

7 9. Detecting faults replace required components. 10. Remove and replace capillary tube, Strainer or De-hydrator of the unit. 11. Test, replace and adjust thermostat for refrigerator and Air conditioner. 12. List materials and components of leak testing. 13. Find and repair leaks of different units. 14. Clean and flush RAC (repaired) units. 15. Evacuate small RAC unit. CONTENTS Trade English: SL Lesson Topics Period No. 1 Introduction and Field Refrigeration and Air conditioning works. 1 2 Excretion and Precaution of Safety. 1 3 Know name and Function of Tools, Equipments and Meters of 1 RAC 4 Principle, Function and Components of Vapor Compression 1 refrigeration system. 5 Know name and function of materials (copper tube and fittings) & 1 Welding (Soldering & Brazing) 6 Introduction, Components Name of basic electricity & Electronics 1 and Function and preparation of circuits. 7 Components, procedures and Practices of Vacuum and Charging. 1 8 Find and Remedy of troubles. 1 9 Materials name and Procedures of Servicing and communication 1 to the customers. 10 Develop Relation with RAC related Person. 1 Total 10 A. Trade Theory: SL. No. Topics Period 1 Introduction and history of Refrigeration & Air-conditioning works. 1 2 Safety Precaution & First Aids. 1 3 Common, Measuring and special Tools in RAC works. 1 4 English. 1 5 Equipments and Meters in RAC trade. 1 6 Heat and related terms. 1 7 Temperature and related terms. 1 8 Trade English. 1 9 Refrigeration related Pressure Force, Work, Energy, Power etc Tube & Pipe and their fittings 1

8 12 English 1 13 Soldering, Brazing & gas welding 1 14 Refrigeration (cooling) System and its unit Trade English 1 16 Vapor Compression Refrigeration system 2 17 Principles of vapor Compression Refrigeration System & Related terms English 1 19 Simple Absorption Refrigeration System Compressors Trade English 1 22 Sealed (Hermetic) and semi sealed compressor Open type compressor English 1 25 Performance compressor 1 26 Oil & Lubricating system of compressor 1 27 Condensers Trade English 1 29 Cooling Tower Refrigerant flow controllers Hand expansion valve and capillary tube English Thermal Expansion valve Automatic and Thermal Expansion Valve High & Low side float and Solenoid valve Trade English 1 37 Evaporate 1 38 Chillers 1 39 Receiver 1 40 English 1 41 Accessories of refrigeration system 2 42 Heating system 1 43 Trade English 1 44 Refrigerants (CFC & Non CFC refrigerants) and Refrigerants Cylinder Green house effect 1 46 English 1 47 Basic Electricity 1 48 Electrical; wiring diagram and Earthlings Parts of Electrical Circuit used in unitary Refrigeration System Trade English 1 51 Motors (Compressor and Blower fan Motor) & Generators 2 52 Heating and Cooling Thermistats 2 53 English 1 54 Relays 1 55 Capacitors 1 56 Timers 1

9 57 Trade English 1 58 Over current (load) protector, Thermal fuse, Cooling fan, Cabinet lamp Selector and Door switch Solenoid valve 1 61 English 1 62 Trade English 1 63 Related basic Electronics 2 64 English 1 65 Refrigeration Appliances 1 66 Refrigerators, deep Freezers and Water Cooler 2 67 Trade English 1 68 Installation 1 69 Beverage Cooler and Display case 1 70 Air Conditioning System 3 71 English 1 72 Pshychometer & Psychometric Chart 2 73 Air Filtration 2 74 Trade English 1 75 Air Conditioning Appliances 1 76 Window Air Conditioner 2 77 English 1 78 Split Type AC 2 79 Vehicle or Car AC 2 80 Trade English 1 81 Servicing 1 82 Se-frosting System 2 83 English 1 84 Fan & Pump 2 85 Leaks 1 86 Trade English 1 87 Evacuation 1 88 Charging & Purging 2 89 English 1 90 Chocking 1 91 Trouble Shooting (Causes and Remedying) 3 92 Trade English 1 93 Brief about food preservation 2 94 Brief about Big Plant or System 2 Total 120 B. Practical: SL. No. Topics Period 1 Visit on Refrigeration & Air Conditioning Workshop 2 2 Name and prepare list goods of First aid box 2 3 Show the effect of heat transfer of Refrigeration cycle 2

10 4 Name and list Tools used in Refrigeration works. 2 5 Name and list Equipments and Meters used in Refrigeration works 4 6 Cutting, Reaming and Bending of Copper Tube. 2 7 Swaging, Flaring and Wedging of Copper Tube. 2 8 Using procedure of Blow pump & Gas welding set required Materials 2 9 Making Charging Line 2 10 Job no Name, Check & Uses of different types Gauges, Gauge manifold and 2 Hose pipe 12 Measure pressure and Vacuum with different gauges & Compare with 2 different scales 13 Name, Find & Uses main part of Vapor compression and simple 2 absorption Refrigeration System. 14 Check the effect of Principles of vapor compression Refrigeration 2 system 15 Verify the working condition of vapor compression Refrigeration 2 system 16 Check and compare Cooling and heating effect of Refrigeration System 2 17 Join main 4 parts of Vapor Compression Refrigeration System with 2 copper tube. 18 Name and use of different types of compressors 2 19 Cutting hermetic compressor 2 20 Name and check different parts of Sealed (hermetic) and semi sealed 2 type compressor. 21 Job no Disassembling and assembling semi sealed compressor 2 23 Job no Job no Charge lubricating oil to the hermetic compressor Job no Name, list & uses of different types of condenser Name and list of different parts and servicing materials of condenser Servicing a find type condenser Name & List of different parts and servicing materials of cooling tower 2 31 Name, list and uses of different types of refrigerant flow controls 2 32 Placement and operation of different types of refrigerant flow controls 2 33 Job no Name and list of different part of Thermostatic expansion valve 2 35 Setting remote bulb or sensible tube of thermostatic expansion valve 2 36 Job no Name, list and uses of different types of evaporator 2 38 Service find types evaporator 2 39 Name and list of different parts and servicing materials of chiller 2 40 Name and list of accessories use in refrigeration system 2 41 Placement 7 functions of accessories of refrigeration system 2

11 42 Name and checking of different part of receiver Uses and function of heater and boiler 2 44 Name and check of different type colored cylinder and check cylinder 2 pressure for different kind of refrigeration 45 Name, list and uses of equipments and parts of Refrigeration 2 transferring system 46 Refrigerant transfer from cylinder to cylinder 2 47 Job no Name and functions of different type of equipments used in 2 49 Name, listing and using procedure of different types of meters and 2 there scales 50 Job no By using circuit required materials compare different type of circuits Name and list different types of motor and generator 2 53 Name, identify and check different parts of motor 2 54 Testing elector magnetic effect of Armature and Rotor 2 55 Test and find terminals of split type motor 2 56 Test and find terminals of blower Fan Motor (2 & 3 Speed) 2 57 Job no Name and list uses devices of electrical circuit for RAC works Make and check electrical open circuit for simple Refrigeration System 2 60 Job no Test current coil relay 2 62 Test potential and PTC relay 2 63 Job no Test and find terminals of Timer 2 65 Name and list different type of selector switch 2 66 Job no Name, list and check on different parts of Magnetic contactor 2 68 Name, list and check of main parts of starter 2 69 Job no Name and list of most usable Refrigeration appliances 2 71 Verify and compare of Refrigerant flow diagram among Refrigerators, 2 Deep Freezer, Beverage cooler, Water cooler and Display case 72 Job no Make and check of Electrical open circuit of different type of 2 Refrigerators. 74 Make and compare of Electrical open circuit of Refrigerators, Beverage 2 cooler, Water cooler and Display case 75 Installation and servicing of Refrigerators and Deep Freezer 2 76 Installation and servicing of Water cooler 2 77 Job no Installation and servicing of beverage cooler and Display case 4 79 Name, list and check of different parts and types of defrosting system Make an open circuit of Auto defrosting 2

12 81 Job no Name and list of main parts of Air conditioning units 2 83 Name and list of different parts of most usable psycho meter 2 84 Name and list of different line of psychometric chart 2 85 Name and list of different type of filters 2 86 Job no Cleaning most usable filters 2 88 Name and list of Duct making tools and materials 2 89 Name and list of different parts of Window and Split AC 2 90 Job no Installation and servicing of Window AC 2 92 Installation and servicing of Split type AC 2 93 Job no Name and list of different parts of vehicle type AC 2 95 Installation and servicing of Car AC 2 96 Job no Name, identify and using procedure of leak test materials and devices 2 98 Find out leak position of leaked unit then repair 2 99 Name, list and using procedure of different parts of vacuum pump and 4 charging station 100 Job no Make proper vacuum of a unit Name, list and using procedure of different parts of Refrigerant 4 Recover machine 103 Charge Refrigerants to the Refrigerator with charging station Charge Refrigerants to the window AC with Refrigerant Recover 2 machine 105 Charge Refrigerants to the water cooler Charge Refrigerants to the beverage cooler Job no Charge Refrigerants to the split type AC Charge Refrigerants to the car AC Job no Visit Work Shop Inspect the Big plant or RAC 4 Total 240

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