QF_ATS_Mech. (DC RAC Machines).pdf

Mechanic (Domestic, commercial RAC Machines) (ATS)

  • Job Description Mechanic Refrigeration and Air Conditioning Unit installs and repairs refrigeration or air conditioning plant by replacing defective parts, re-seating valves, refitting coils, insulting, requiring electrical connections, soldering etc. Plan and organize assigned work and detect & resolve issues during execution.
  • SectorCapital Goods & Manufacturing
  • NSQF LevelLevel 5
  • Notional Hours4120
  • Accrediting BodiesNational Council for Vocational Training (NCVT)
  • Certifying BodiesNational Council for Vocational Training (NCVT)
  • Proposed Occupation

    Mechanic (Domestic, Commercial RAC Machines) has a wide scope of Employability ranging from self-employment, contractual employment to Industrial jobs. On successful completion of this course, the candidates shall be gainfully employed in the industries for following occupations:

    • Ice Plant
    • Cold storage plant
    • Central Air Conditioning Plant
    • Manufacturing plant.
    • Service centres.
    • Marine refrigeration and AC
    • Air Craft AC
    • Car and Bus AC
  • International Comparability

    1.  Existence of any official document suggesting the comparability of the qualification with the qualifications in other countries is not known.

    2.  However, NAC holder trainees are getting employment in many Gulf countries, European countries, Australia, New Zealand, Singapore etc.

  • Planned arrangements for RPL
    1. Only those candidates will be allowed to appear in the Test conducted by NCVT as Private candidate who have already acquired the National Trade Certificate.
    2. Three (03) years experience of the candidates wishing to appear as Private candidate after obtaining NTC should be in the same trade in which he proposed to acquire the National Apprenticeship Certificate.
    3. Private candidates possessing the minimum educational qualification required for engagement as an apprentice in that particular trade and the minimum experience as stated above would only be permitted.
    4. Candidates are to be sponsored by an establishment and should not be entertained directly.
    5. Only, the experience acquired by the candidate in an establishment implementing the Apprentices Act, 1961 should be considered and such certificate should be issued by the Officer In-charge of Training of that establishment.
  • Qualification File QF_ATS_Mech. (DC RAC Machines).pdf
  • Supporting Documents
  • Formal structure of the qualification
    Title of unit or other component Estimated size (Hours) Level
    Identify the Compressors viz Reciprocating, Rotary, Scroll & their advantages & limitations Dismantling & Assembling of compressor, Servicing of compressor parts, checking components, Checking pumping and repairing Gasket Cutting, Checking Lubricating s 60 4
    Service/flushing of condenser, Importance of keeping condenser clean ,Remove and replace of Drier/filter ,Remove and replace capillary tube , Servicing/flushing of evaporator, Leak Testing and repairing of evaporator. 60 4
    Handle and taking care of refrigerant cylinders, transfer of refrigerant from storage to service cylinder, Refrigerant cylinders identification of Refrigerant ,safety in handling of Refrigerants, Safe handling of Refrigerant cylinders & valves, Testing of 60 4
    Access sealed system using piercing plier and valves/use recovery machine to recover, CFC/HCF/HFCs: Basic tests for quality of recovered component needing change. Clean/flush with dry N2 chemicals Trichloroethylene, safety in handling, safety in handling 60 5
    Retrofit a CFC filled commercial and Domestic Refrigerator with Hydro carbons/HFCs using sealed components. 60 5
    Repair/Service of HC Refrigeration system using correct technique and ensuring safety, stripping direct cooled domestic refrigerator, Cleaning/Inspection/Testing of components direct cooled Refrigerator. 60 5
    Find fault of direct cooled Refrigerator, Rectification of faults etc. Stripping of components, tracing electric circuit, thermostat, Bi-metallic, Defrost heater, Timer, Air-ducting, fan motor, Air purifiers in Frost free refrigerator. 60 5
    Trouble shooting in Frost free refrigerator , common problems in Refrigerators like No cooling Poor cooling High Current Electrical leak. Observe various pressure, temperature, current and noise etc. Study of water cooler construction & water filers clean 60 5
    Check water circuit, electrical circuit working and controls, Leak test, evacuation & Gas charging, making test jigs for fault finding. 60 5
    Trouble shooting of commonly faced problem of water cooler like condenser fan failures, study of Bottle cooler, construction of electrical circuit, Leak Test, Evacuation & Gas charging, Making of test board. 60 5
    Trouble shooting of commonly faced problem of Bottle Cooler like condenser fan, failures, corrosion etc. Repair & maintenance of deep freezer, visi cooler, electrical circuit Leak Testing, Vacuuming & Gas charging of Deep freezer, Visi cooler Trouble shoo 60 5
    Retrofit a Refrigerator with HFC 134a of water cooler, Deep cooler, visi cooler & limits on charge of HCs. 60 5
    Repair a refrigerator cabinet & spray painting, testing electrical components, leak repairing, testing leak, vacuuming and gas charging of ice cuber. 60 5
    Test electrical components, repairing leak, testing leak, vacuuming & gas charging of juice dispenser. 60 5
    Measure the dry bulb & wet bulb temperature, using of sling psychrometer , study and use of psychrometic chart. Stripping, Cleaning, Inspection Testing of components like outer wrapper, Grills, Blower motor, condenser fan portion, evaporator & Condenser, 60 4
    Service and repairing of Air-coolers/desert cooler, Stripping of Room cooler and condensing unit. Identifying and cleaning, inspection, testing of components & re-assembly of Split AC 60 5
    Operate the tangential blower sweep and swing mechanism, test electrical and electronics component including special function like auto cool, sleep dry etc. wiring, servicing and trouble shooting of split AC. 60 5
    Installation, inspection, testing, Electrical components testing, wiring of Window A.C 60 5
    Service a window AC, Test Leak, Vacuuming, Gas charging of window AC, Trouble shooting, also use of correct instruments and tools. 60 5
    Installation, inspection, testing Electrical components, wiring in a Split AC. 60 5
    Service a Split AC, Leak Test, Vacuuming, and Gas charging of split A.C. 60 5
    Trouble shooting, also use of correct instruments & Tools, Servicing of blower, fan motors and cooling coils. 60 5
    Dismantle and assemble of wobble plate comp used in Auto A.C. Mounting Brackets on Engine blocks and compressor on Brackets and adjustment of belt tension. Types of “O” Ring compression pipe joints and flared joints. Hot water systems and mixing valves fo 60 5
    Operate the electromagnetic clutches on compressors. Check air flow and direction control. Check HP-LP switches, receivers, fast idle control devices ,vacuum and gas charging , tracing of wiring based on diagrams, identification and function of key comp 60 5
    Repair, evacuation and charging of Auto A.C. systems. Trouble shooting of common faults on :- No cooling Poor cooling Reduced air supply Engine overheating High compressor noise 60 5
    Retrofit of CFC car A.C. system with HFC 134a. 60 5
    Total (Block-I) 1560 5
    Identify the refrigeration cycle and components for high, medium and low temperature application machines, identification of tubes and pipes, joints & pipe layout, observe safety and fire fighting equipments. 65 4
    Draw the layout of Refrigeration cycle machines. Study lubrication system and lubricants. Refrigerant gas cylinder and their use, colour code and safety. 65 5
    Practice in connecting domestic refrigerator electric motor with main supply, measurement of current in the circuit. Use of megger for insulation testing. 65 5
    Test new evaporator coils for leak and choke. Repairing & cleaning of fins type evaporator & condenser coils. 65 5
    Test condenser coils for leak and choke & repairing. De scaling of water cooled condenser. Servicing of air cooled condenser & straightening of fins. 65 4
    Handle the gas cylinders, repair of leaky cylinder, reclaiming of refrigerant from dead refrigeration system. Charge the refrigeration oil & remove oil with the help of syphon or vacuum method. 65 4
    Wire a hermetic compressor motor with relays, controls, cabinet light & find their fault & remedies. 65 5
    Recover CFC / HCFC / HFCs by use of recovery Machine. Change the components, clean & flush with dry N2. Retrofitting of CFC filled commercial as well as domestic appliances with hydrocarbon, HFCs using sealed components. 65 5
    Safe handling of N2 cylinder with 2 stage regulator, Replacement of components, brazing sealed system, leak testing with dry N2 pressure test. Evacuation of refrigeration system. 65 5
    Trouble shooting- commonly faced problems in direct cooled refrigeration system in mechanical & electrical & their remedies. Retrofitting. 65 5
    Trouble shooting- commonly faced problems in frost free refrigeration system in mechanical & electrical & their remedies. Retrofitting. 65 5
    Service of ice cuber, testing electrical circuit, leak tests, evacuation and gas charging, check water circulating system. Retrofitting of existing system. 65 5
    Service of water & bottle cooler, testing electrical circuit, leak tests, evacuation and gas charging. Retrofitting. 65 5
    Service of deep freezer, testing electrical circuit, leak tests, evacuation and gas charging. Retrofitting. 65 4
    Service of visi cooler, testing electrical circuit, leak tests, evacuation and gas charging. Retrofitting. 65 5
    Operate Sling psychrometer, study and use of psychrometric charts, measurement of dry bulb and wet bulb temperature, relative humidity. Stripping, inspections & cleaning of outer wrapper, grills, slower motor. Condenser fans positions, evaporators, conden 65 5
    Service and maintenance of window A.C, testing the mechanical and electrical system for fault certification. Installation of Window A.C. Use of Remote Controls, identifying PCB & Remote related problems & replacing PCBs. 65 5
    Service and repairing of air cooler/desert coolers stripping of air cooler / desert coolers stripping, inspection, cleaning & reassembly of components. 65 5
    Service and maintenance of split A.C. safety aspects, leak testing, evacuation, gas charging & testing performance, installation of split A.C. 65 5
    Dismantle and assembly of wobble plate compressor used in automobile A.C. assembling compressor on mounting brackets, engine adjustment, temperature controls, identification and functioning of key components like thermostat, electrical operating valves, f 65 5
    Select compressor, condenser, drier /filter, size & length calculation of capillary, evaporator selection in small capacity refrigerator 65 5
    Select the compressor, condenser, drier/filter, size & length calculation of capillary, freezer selection, selection of commercial water cooler & bottle cooler. 65 5
    Select the compressor, condenser, drier/filter, and size & length calculation of capillary for evaporator in Ice cube machines. 65 5
    Select the compressor, condenser, drier /filter size & length calculation of capillary, evaporator selection for Window & spilt A.C. 65 5
    Total (Block-II) 65 5
    Basic Training, internal assessment and Examination 1560 5
    Total 1000 5