MEMBERS OF THE TRADE COMMITTEE FOR THE TRADE OFREFRIGERATION AND AIR CONDITIONING MECHANIC

CHAIRMAN :Shri M.A. Risaldar R.D.D Office,R.D.D., Ahemedabad Kubernagar, Ahemedabad

MEMBERS:(S/Shri….)

1. V.R. Bhavsar I.T.I. NasikPrincipal(Rep. of R.D.A.T. Bomaby)

2. Dr. M.B.Jain D-6, Parul Flat,Retired H.O.D., S.M.Road,Mechanical, Ambavadi, AhemedabadL.D. College of Engineering

3. A.Y. Shukla Aerotherm Products,Managing Director 414, Bhadr-raj Chamber

Navrangpura, Ahemedabad4. S. Jayraman Voltas Limited

Service Engineer Pushpak Bldg.,Khanpur, Ahemedabad

5. N.M.Patel Kirti Sales Pvt LtdManaging Director Kirti House , Nr. H.K. House,

Ashram Road, Ahemdabad

6. Sunil V.Shah Vam Airtex Pvt. Ltd.Director 4/5/15, Vasu Pujya Chamber

Ashram Road, Ahemedabad.

7. L.D.Sharma I.T.I./A.V.T.S.Principal Kubernagar, Ahemedabad

8. E.I. Christie I.T.I/A.V.T.S/Vice Principal Kubernagar,Ahemedabad

9. K.S. Suthar A.V.T.S.Jr. Training Officer KUbernagar, Ahemedabad.

GENERAL INFORMATION

1. Name of the Trade Refrigeration & Air ConditioningMechani

2. N.C.O. Code No. 845.70

3. Entry Qualification Pass in 10th class examinationunder 10+2 system of educationwith Science and Mathematics orits equivalent

4. Duration of Craftsman 2 yearsTraining

5. Duration of Apprenticeship 3 years including two yearsTraining Basic Training

6. Rebate to Ex-ITI Trainees Full

7. Ratio of Appretices to Workers 1:3

SYLLABUS FOR THE TRADE REFRIGERATION &AIR CONDITIONING MECHANIC

Under Craftsman Training Scheme

Duration of Training: 2 Years

Unit wise distribution of Practical Skills

General Engg. Training Unit AServicing Domestic ref. Appliance Unit BServicing Semi-commercial Ref. Appliance Unit CServicing Cold-storage-small CapacityUnit DServicing Air Conditioning Plant Small Capacity Unit ERepair & Maintenance Domestic & Semi CommercialRef. Appliance Unit f

WEEK WISE DISTRIBUTION OF PRACTICAL SKILLS

Unit Prg.SkillArea

No.ofWeek

WeekNo.Fromto

Unit Trg.Skill No. ofWeek

Week No.From To

A 1 Introdution/OrientationBasicBasicFitting

1

5

1-2-6 C Servicing Semi-commercial Ref.Appliances

3 53-55

A 2 Basic SheetMetalBasicWelding

2

2

7-8

9-10

D-1 ServicingCommercialreciprocatingcompressor

5 56-60

A 3 BasicElectrical

6 11-16 D 2 Servicingcommercialcondenser, tower,water treatmentplant

4 61-64

A 4 BasicElectronic

2 17-18 D 3 Servicing,evaporatorchiller, Ref.control

2 65-66

SYLLABUS FOR THE TRADE OF REFRIGERATION ANDAIR/CONDITION MECHANIC

UNDER CRAFTSMAN TRAINING SCHEME

Period of Training : 2 Years.

A 5 BasicAutomobile

2 19-20 D 4 Servicing &operation coldstorage small cap.

6 67-72

Revision Test 21-22 Revision Test 73-74B 1 Identification

ManipulationRef.tools&components

3 23-25 E 1 ServicingAir hadlinghumidityControl & heating

4 75-78

B2 ServicingdomesDomestic –semi-Commercial& car A/ccomponents

8 26-33 E 2 Servicing &operationAirconditionplant smallcapacity

4 79-82

B 3 Servicing AirCooledcondenserCooling coil& controls

5 34-38 F 1 Repair &maintenancedomesticrefrigerationAppliance

1 83-83

B 4 Servicingrefrigeratedcabinet andstorage

2 39-40 F 2 Repair &Maintenancesemi-commercialRef. appliances.

3 84-86

B 5 Checking andTestingRefrigerationSystem

7 41-46 F 3 ServicingDomesticAircondition &Car A/c

4 87-90

B 6 CheckingtestingWindow A/c& Spilt A/cRevision &Test

2 49-50

51-52

IndustrialTraining

Revision & Test

91-102

103-104

SYLLABUS FOR THE TRADE OF REFRIGERATION ANDAIR/CONDITION MECHANIC

UNDER CRAFTSMAN TRAINING SCHEME

Period of Training: 2 Years.

WeekNo.

Practical Theory W/ShopCal.

W/ShopSci.

Engg.Drg.

1. Induction training.Familiarizationwith the Institute.Type of practicalTraining to befollowed.Workshop safety.

Importance ofthe trade inthe industrialandcommercialfield.Theoreticalsubjects to betaught.Achievementto be made.

________ ________ _______

2. Use of simplemarking andmeasuring tools.Marking out asper Blue print.Chipping Flat,grinding chisel.Hacks awing toalien.

Method ofmarking,Markingmedia. Simplemarking andmeasuringtools & theiruse. ChiselHacksawframe & bladetypespecification& use.

Fraction-addition,subtraction,multiplication &division.

Unit &measurement,fundamental &derivedunit.

Freehandsketching ofstraightlineRectangle, circlepolygonetc

3. Filing flat, squareround & profile.Drilling clear andblind hole.Counter sinkingcounter boringgrinding drill bit.

Files anddrills Types,specification,Use, care andsafety Drillingspeed feedand coolants.

-do- -do- -do-

4. Tapping clear andblind hole.

Taps and dies-Their

-do- Matter,mass,

Freehand

Treading b die.Fitting stud &removing brokenstud. Handreaming andfitting dowelpin.

specification,use and safety.Reamers typespecificationuse and safety.

volume,density andspecificgravity.

sketching ofsimplesolidcube,rectangular blockcylinderetc.

5. Inspection &checkinglongitudinal,angularparallelism,squareness flatness andconcentricity.

Importantprecision

measuring,marking and

checkingtools- type

specification,use and careand safety.

Decimaladdition,

subtraction,

multiplication and

division.

-do- -do-

6. Scraping flatsurfacesharpening ofscapper Lapingand polishing flatsurface.

Limit, fit andtolerance.I.S.I.specification,Scraper-type,specificationand plate type,specificationand use.

-do- -do- -do-

7. Use of sheetmetal tools andequip. care andsafety. Makingsheet metal jointsas used inductingriveting on sheetmetal.

Sheet metaltools andequip. type,specificationcare andsafety. Typesof sheet metaljoints andtheir use Rivetand riveting-their types anduse.

Decimaladdition ,

subtraction,

multiplication and

division.

Motiondisplacement speed,velocity,

acceleration.

Use ofdifferenttypes ofline &symbol

fordrawing.

8. Soldering andbrazing on sheet

metal joints

Soldering andbrazing .Different types ofsolder,

Conversionof decimalsto commonfraction.

-do- -do-

compositionand use offlux-theireffect onmetal Methodof solderingand brazing.

9. Welding tools andequipment careand safety. SettingOxy-actiylinepl;ant. Lightingand adjustmentflame-simple jointM.S.Setting oxygen &acetylene pressurefor welding ofthin sheet & sheetcutting.

Welding toolsandequipment-typespecificationand use.Safety methodin welding.Method of gaswelding gasused andflameadjustment.

-do- Motiondisplace-mentspeed,velocity,acceleration..

Freehand

sketching nut

bolt rivetand

washersetc.

10. Electric welding-current setting,striking andmaintaining are.Simple electricjoints on M.S.

Method ofelectricweldingelectrod typeandapplicationobject of fluxcoating.Weldingsymbols andISI code forgas and arcwelding.

Reductionof commonfraction todecimal.

Laws ofmotionforce andmom-entum,measurement of forceandmomentum.

-do-

11. Use of electricianhand tools. Safetyprecaution andfirst aid, Joints onsingle and std.conductors andsoldering.

Electricianhand toolstypesspecificationuse care andsafety.Commonterms used inthe trade.Conductors

Percentageand itsapplication.

-do- Freehandsket-ching ofscrewandscrewtreads.

and insulators.Selectedletters symbol,and sign asper ISI rulefor mediumvoltage.

12. Measuring ofcurrent voltagepower and energyby voltmeter,ammeter, watt-meter &energymeter.

Electricalwork powerand energy,theircalculation insimpleelectricalcircuit. Typeuse andconstructionof commonelectricalmeasuringinstruments.

-do- -do- -do-

13. Formation ofsimple electricalcircuit, seriescircuit andparallel circuit,measuringinsulationresistance & earthresistances..

Simpleelectricalcircuit,essentialrequirement ofelectricalcircuit, seriesand parallelcircuit.Differenttypes ofresistances.Earthing andfuses.

-do- -do- -do-

14. Fixing andconnectingelectricalswitches, holders,fuses, plugsockets on T.W.board and testing.

Types gradesand sizes ofinsulated wireand cablestheir selectionand use. Listof material ofwiring.

-do- Weight,gravitationand centreof gravity.

Simpleorthpgra-phicprojection 1st

amg;eamd 3rd

angle.

15. Care maintenanceand running ofA.C single andpoly phase motor,starters andtransformer.Checkingcontinuity earth,open etc. Use ofmegger Serieslamp.

A.C. motor,starters andtransformer.Their workingprinciples,specification& use. Care &safety.

Mensuration –area ofsquare,triangle,circle andellipse.

Evaporation, boiling,condensationfreezing.Effects ofpressure onboiling andfreezingpoint.

Drawingdifferenttypes ofclutches,coupling, bearing

andlubricati

onsystem.

16.-do- -do- -do- -do- -do-

17. Introduction toelectronics.Components-Resister,Capacitor,Diode,Transistors,Zener,Transformer etc.

Electromovement,conduction &semi-conductorresister & itstype, capacitor& its type,Zener &characteristics, Transistor asan amplifier,Transistor as aswitch.

Ratioproportion& itsapplication.

Work,power,energy,source ofenergy,Kineticenergy andpotentialenergy.

Sketching ifdifferentviews ofsimplesolid &hollowbodies.

18. Transistor as aswitch &amplifier, voltagestabilization.Types ofstabilization &application.

Transistoramplifier andconfiguration.Differentmethods ofstabilization.Voltage &currentstabilization.Wattagecapacity.

-do- -do- -do-

19. Starting&stopping ofEngine,operations of

I.C. engine,types-mainpart workingof each types.

Decimal ParblockPrismetc.

various controls.In driver cabin,Adjustment of abelt tensionremoving &fitting of radiator,dynamo, belt etc.Removal &refitting batterywith correctpolarity.

Powercalculationstudy of panelboard.Identificationof instrumentsof panelboard. Theirrequirementsin vehicle.Dynamo itsbasicfunctions,water, pump,radiator theirfunctions. Beltadjustments.Batteryfunction &safety.

20. -do- -do- -do- -do- -do-ACHIEVEMENT: Trainees will be able to:1. Use and manipulate fitters hand tools and equipment.2. Use and manipulate fitters hand tools and equipment. Simple fitting job.3. Use and manipulate sheet metal tools and equipment.4. Use and manipulate sheet metal tools and equipment. Simple sheet metal job.5. Use and manipulate sheet welder tools and equipment.6. Use and manipulate welder tools and equipment. Simple gas and welding.7. Use and manipulate electricians hand tools.8. Use and manipulate electricians measuring instruments.9. Use and manipulate electricians measuring instruments. Connection and

operation of AC motors and starter.10. Use and manipulate electronic service circuit.11. Use and manipulate electronic circuit.12. Study of engine & driver cabin control.

21. Revision Revision -do- -do- -do-22. Test Test -do- -do- -do-23. Use refrigeration

serviceTools-care andsafety.

Refrigerationservice toolstype,specificationand use,refrigerationcomponents.Typespecificationsand use.

Metric systemweight &measurementunit andconversionfactors,problems.

Simplemachine andmechanicaladvantage.

Use ofdrawinginstruments. T-square,Drawingboards.

24 Cutting ,bending andjoining of coppertubing Flaring,swaging, pinchingand silver soldering.

Refrigerationprinciple systemof refrigerationand applicationof refrigeration.

-do- -do- Use ofdifferenttypes ofscales,inch andmmlettering,numberandalphabets.

25. Identification ofrefrigeration systemStrippingComponents Care &Safety.

Vapourcompressionsystem cycle ofoperation.Componentsand division –H.P. sides &L.P. sides of thesystem.Refrigerationcapacity of thesystem.

-do- Transmission of motion& power.

-do-

26. Dismantlingreciprocatingcompressor CheckingComponent parts-value plate.reeds,piston, piston pin sealetc.

Refrigerationcompressor. Itsfunction-modeof drive type ofcompressionclassificationand application.

Algebraicsymboladdition,subtractionmultiplication& division.

-do- -do-

27. Dismantling car A/creciprocatingcompressor CheckingCoponent parts valueplate-clutch-clutchbearing , reedspiston-piston pin sealetc.

Car A/ccompressor itsfunction modeof drive types ofcompressorclassificationand application.

-do- -d0- Drawingof simplefigure andsolid withdimensions & titles

28. Servicing and testingcompressor (open &Car A/c) servicevalve, Shift Sealpiston assembly andvalve plate assemblyetc.

Reciprocatingcompressor/carA/ccompressor-nameconstructionand function ofcomponentparts.

Simpleequations andtranspositionproblems.

Stress andstrain.Modulas ofelasticityultimatesstrength.Factor ofsafety.

-do-

29. Cutting gasket ofcompressor.Assembly ofcompressor parts-testing pumpingeffect.

-do- -do- -do- -do-

30. Dismantling ofhermatic compressor.Checking andservicing ofcomponents.Assembly ofcompressor andtesting.

Hermaticcompressor-itsconstructionand application,advantage anddisadvantage ofopen unit andhermatic unit.

-do- -do- -do-

31 Dismantling of Semi-Rotary compressor(Axial type.)

Checkingand servicingComponents-parts-Assembly & Testing.

Semi RotaryCompressortypes (Axialtype),Constructionand application.Name andfunctioncomponentparts .

StandardformulasSimplesimultaneousequation withtwo unknownquantities .

Pressure, atmosphericpressure ,absolutepressure,gauge andvacuum.

-do-

32 Study of centrifugal& Screw typeco,pressors.Identifications of itsparts and working.

Centrifugal &screw typecompressor,constructionandapplication ,name andfunction ofcomponentsparts.

-do- -do- Projectionof square,circle,polygonetc.

33. Dismentling car A/cRotary compressor(VANE type)checking andservicing componentsparts assembly andtesting

Car A/c Rotarycompressor(VANE type)types,constructionand application.Name and

-do- -do- -do-

function ofcomponent part.

34. Servicing air cooledcondenser/Car A/cCondenser and liquidreceiver, checkingLeak-repaire andtesting.

Condenser-CarA/c compressorits function.Type ofclassification.Constructionand application.

-do- Chemistryof commonelementssuch asCarbon.Oxygen,Hydrogenandhalogen.

Projectionof solidandhollowobject.

35 Servicingevaporator/Car A/cevaporator removalof oil fromevaporator, checkingleak repair andtesting.

Evaporator itsfunctions typesclassificationandapplications.

-do- -do- -do-

36 Checking automaticand thermostaticexpansion valves andcapillary tube.Servicing and testing.

Refrigerationcontrolfunction andtype, automaticthermostaticand capillarycontrolconstructionoperation andapplication.

Simplealgebraicproblem.

-do- -do-

37 Checkingthermostatic switch,high and low pressureswitch and oil failureswitch servicing andtesting.

High pressureand lowpressure and oilfailure switchconstructionoperation andapplication.

-do= -do- -do-

38 Checking solenoidvalve pilot controlvalve and suctionregulating valveservicing and testing.

Checkingsolenoid valvepilot controlvalve andsuctionregulating valveconstructionoperation andtesting.

-do- Corrosiveaction duetoelectrolyteandchemicalaction.

-do-

39 Servicing refrigeratedcabinet. Checkingbody inside liner anddoor liner repairdefect.

Refrigeratedcabinet type andclassificationconstruction andapplication.

Logarithmreading fromtabledeterminationofcharacteristic

Thechemistry ofcompoundsuch asCarbondioxide

View offvarioussolid andhollowobject andcut by

andantilogarithm.

ammonia,Freon.

sectionplane.

40 Replacing thermalinsulating materialinside body and doorliners and door gasketadjusting dooralignment.

Thermalinsulatingmaterial. Puf.There types ,properties, useand safety. 0do-

-do- -do- -do-

41 Handling of gascylinders repair leakycylinder. Transfer ofrefrigerant.Identifications ofvarious refrigerant incylinder.

Safety inhandingrefrigerant andcylinder colourcode of cylindermethod ofrefrigeranttransfer.Saturationtemperature V/Spressure ofrefrigerant(Familiarisation withtable).

Application oflogarithm.

-do- -do-

42 Oil charging tocompressor.Installingcompressor, coolingcoil and condenser ofrefrigeration unit.

Oil used inrefrigerationsystem. TheirdesirablepropertiesProper selectionof refrigerantoil. Oiltreatment beforecharging.

Geometry-propertiesline, angle,triangle andcircle.

Propertiesand use ofcast-ironwroughtiron, planeCarbon,steel andalloy steel .

Isometricview toorthographic views.

43 Checking thermalO/L protector motorstarting relays andcapacitor-electricwiring ofrefrigeration systemopen and sealed unit.

Thermal O/Lprotector motorstarting relaycapacitor types,functionconstructionand applicationand study ofwiring diagramof refrigerationopen and sealedunit.

-do- -do- -do-

44. Testing leak in thesystem using dry air,carbon-di-oxide,nitrogen,Vaccumizing anddrying the system

Vacuum pump,vacuum guage,and leakdetectors, theirtypespecification,

-do- -do- -do-

using deep vacuumPump.Familiarisation withvacuum gauge .Desirable vacuum insealed and opensystem.

Range ofdesirablevacuum in open& sealedsystem.

45 Charging gas in thesystem, study ofgauge readings.Effect of overcharging and undercharge.

Application ofindirectrefrigerantRefrigerants-their desirablecharacteristics.Their propertiesand use, (f-12,f-22,f-11,NH3)

Graph-objectand use ofgraph . Rulesof plotinggraph,Interpolation.

Effect ofalloyingelements onproperties ofmetals.

Orthographic viewstoisometricviews.

46. Testing leakage in therefrigeration system.Using hallde torchelectronic leakdetector Repairedleakage and testing.

Freon grouprefrigerants,atmospherefriendlyrefrigerant 134A. Theirproperties anduse. Care andsafety inhandlingrefrigerant.

-do- -do- -do-

47 CheckingCompression typeRefrigerator-nonfrostrefrigerator anddifferent type faultfinding, servicing andtesting.

Refrigerator-Nonfrostrefrigeratordifferent types.Their type,function anduse. Troublediagnosis andremedies.

-do- Propertiesand use ofcopper,zinc, lead,tin,aluminium,etc.

-do-

48. Visit absorption typerefrigerator/airconditioning plant.

Absorption typeRefrigerator-Air –Conditioning itsprinciple andapplication.

-do- -do- -do-

49 Checking windowtype air conditioner-spilt type ductablenon-ductable type airconditioner faultfinding servicing &testing.

Window typeairconditionerspilt typeairconditionertheir type,function andapplication.Trouble

The plottingof co-ordinates.Representation of simpleequation.

-do- Development ofsurface ofsimpleobject.

diagnosis andremedies.

50. -do- -do- -do- Propertiesand use ofbrass,bronze,solder,bearingmetal etc.

-do-

51. Revision Revision -do- -do- -do-52. Test Test

ACHIEVEMENT: Trainees will be able to :1. Service open type of compressor, sealed system and semi-sealed system.2. Service air cooled condenser cooling coil and control3. Service air cooled condenser cooling coil and control : service refrigerated

cabinet & storage.4. Test leakage, evacute, charge oil and charge gas to the system.5. Service window air condition/Spilt air conditioner.6. Service window air condition /Spilt air conditioner.7. Service package plant 5 to 15 TR.8. Service car air conditioner compressor.

53.

Checking watercoolerinstanteneous andstorage, type andbottle cooler-visible cooler deepfreezer, faultfinding servicing& testing.

Water coolerand bottlecooler-visibledeepFreezer:Their typefunction ofparts,working anduse. Troublediagnosis andremedies.

Trigonometry-trogonometric-function-standardandformulae.

Meaningoftenacity,elasticity,maleability,brittleness,hardnessductility.

Curve ofinterpenetration.

54. -d0- -do- -d0- -do- -do-55. Checking ice

candy plant andice-cream storage.Fault findingservicing andtesting.

Ice candyplan & ice-creamstorage, theirtype, functionandapplication

-do- -do- -do-

troublediagnosis andremedies.

56. Dismantling ofcommercial typereciprocatingcompressor,checkingcomponent parts.

Performanceofreciprocatingcompressorvalue metricefficiencyfactorinfluencingvolumetricefficiency.

-do- -do- -do-

57. Checking andservicing vlaveplate and pistonassembly, lappingvalve plate etc,fltting and testing.

Commercialtypereciprocatingcompressor-their typeconstructionandapplication.

-do- Heat andtemperature.Measurement. oftemperature.

-do-

58. Checkinglubricatingsystem, servicingoil pump etc,fltting & testing..

Compressorlubrication,type oflubricationsplash andforced feed,compressoroil functionandcharacteristic.

-do- -do- -do-

59. Checking andservicing capacitycontrol of thecompressor.Bearing shaft sealfltting & testing.

Compressorcapacitycontrol –Differentmethod andapplicationMultistagecompressor-theirfunction,application.

Use oftrigonometrical tableappliedproblem

Differentthermometric scalesand theirmutualconversion, absolutetemp laincarbonsteel andalloy steel.

Drawingof rivetandrivetedjoints.

60. Cutting gasket and Cemrifugal -do- Quantity -do-

assembly ofcompressor.Testing efficiency.

compressor,Constructionandapplicationrefrigerantused.

of heatand itsdifferentunits theirmutualrelation.

61. Servicing of watercooled condenser& evaporativecondenser receiverchecking leakagerepairing &testing.

Condenser-its type andcapacity.Water cooledcondenser-evaporativecondensertheir typeconstruction,function &application.

-do- -do- Drawingofdifferenttypes ofthreads,nuts,bolts,lockingdevices,keys andcutters.

62. Servicing ofcooling towerwater softeningand iron removingplant its care andmaintenance.

Coolingtower F.R.Ptower itsprinciple,type &application.Watertreatmentplant.Constructionandapplication.Method ofironremoving andwatersoftening.

Calculationof area oftrianglepolygon ets.

-do- -do-

63. Servicing of watercirculating pump,water regulatingvlave, highpressure safetycontrol etc. itscare andmaintenance.

Watercirculatingpump waterregulatingvalve andcontrol highpressuresafety controletc. Their

-do- -do- -do-

typeconstructionandapplication.

64. Air cooler-Roomcooler and desertcooler-watercycle, its care andmaintenance.

Types of Aircooler-watercycle- itsconstructionandinstallation itscare &maintenance.

-do- Specificheat,sensibleheat, latenheat, totalheat superheat.

-do-

65. Servicing ofcommercial typeevaporator liquidchiller its care andmaintenance

Commercialevaporatorliquidchillingevaporatorair-coolingevaporator,-natural-andforcedconvection –Their type ,constructionapplication.

-do- -do- -do-

66. Servicing of heatexchanger,commercialrefrigerantcontrol-expansiondevise, solenoidvalve etc. &electrical control,its care safety andmaintenance.

Heatexchanger-commercialtyperefrigerantcontrol, itsfunctionconstructionandapplication.

-do- -do- -do-

67. Servicing coldstore coolingsystem control andinstrument .

Foodpreservationspoilageagents controlof spoilageagents,preservationby

Volume andweight ofsimple solidbodies.

Vapourand gases.Saturatedand superheatedvapour.Criticalpressure

Drawingofdifferenttypes ofthreads.Nuts,bolts,locking,

refrigeration.Cold storage-typeconstructioncapacity andspecification.

andtemperature etc.

deviceskeys andcutters.Rivetedjoints.

68 Installingcommercial tube,Compressor .Useof vibrationeliminator andshook absorber.

Method ofinstalling.Compressorvibrationeliminatorand shockabsorber theirtype andapplication.

-do- -do- Drawingof pulleyandpulleydrive,gear andgearing.

69 Electric wiring ofthe compressorand checking thewiring system ofthe plant.

Study of layout andelectricwiring of thestorage plant.

Volume andweight ofregular conesphere.

Gas law-perfectand realgases,Daltonlaw.

-do-

70 Pressure testingleak detection andevaquating thesystem.

Method ofpressuretesting leakdetection andvacuumizingthe system.

-do- -do- -do-

71. Charging gas tothe system andtesting theefficiency.

Method ofcharging gasto the systemand testingefficiency.

-do- -do- Drawingofenginecompressor andpumppartssuch aspiston,connecting, rod,crankshaft.

72. Cold storage plant,operation. Its careand safety.

Cold storageplantoperation. Its

Volume andweight ofsimple

-do- -do-

commontrouble andremedies.

hollowbodies.

73. Revision Revision. -do- -do- -do-

74. Test Test ………… ……. ……

ACHIEVEMENT: The trainees will be able to :1. Service semi-commercial refrigeration appliances.2. Service commercial type reciprocating compressor.3. Service commercial type condenser, cooling tower and water treatment plant.4. Service commercial type evaporator and control .5. Service and operate cold store (Small capacity)

75. Care, maintenanceand use of silingpsychrometer,hygrometer, humidstat, remote bulb,thermometer,thermostat etc.

Study of air-dew pointspsychometricchart, humidity,measurement ofhumidity.

Transmissionof power-appliesproblems.

Hygrometryproperties ofair,D.B,.WBtemperaturerelative andabsolutehumidityetc.

-do-

76. Care andmaintenance and useof anemometer, pilottube and monometeretc.

Air distributionducting size andconstruction,measurement ofair flow.

-do- -do-

77. Servicing of fan,blower, damper, airfilters, humidifier anddehumidifier etc. itscare andmaintenance.

Fan, Blowerdamper, airfilters,humidifiers anddehumidifiersetc, theirconstructionand application.

-do- -do- -do-

78. Servicing the heatingsystem of the plant.Its care and safety.

Space heating-various methodof heating.Function andapplication.

-do- Transfer ofheat,conduction,convectionandradiation.Thermalconductivity

-do-

etc.79. Servicing and testing

of air conditioningsystem and itscontrol.

Airconditioningcomfortcondition,factorsinfluencingcomfort-comfort chart.

Estimatingand costingappliedproblems.

-do-

80. Installingcompressor, electricwiring and checkingthe wiring system ofthe plant.

Capacity andselection of airconditioningplant study oflay out andwiring diagramof the plant.

-do- -do- Drawingof detailscomponents fromassemblies.

81. Leak detecting,vacuumising, gascharging and testingthe system.

Method of leakdetectionvacummising,charging gasand testing thesystem.

-do- Generallaws ofthermodynamic 1st

and 2nd law,mechanicalequivalentof heat etc.

-do-

82. Air conditioningplant operation. Careand safety.

Airconditioningplant operation-common troubleand remedies.

-do- -do- -do-`

83. Repair andmaintenance ofrefrigerator, Nonfrostrefrigerator and deepfreezer.

Refrigerator,Non-frostrefrigerator anddeep freezertheirmaintenancetroublediagnosis andremedies.

-do- -do- -do-

84. Repair andmaintenance of bottlecooler-visible coolerand water cooler.

Bottle cooler –visible coolerand watercooler- theirmaintenance,troublediagnosis andremedies.

-do- -do- Code ofpracticeforgeneralengineering drawingby I.S.I.

85. -do- -do- -do- -do- -do-86. Repair and

maintenance of ice-candy plant.

Ice-candy planttheirmaintenance,

Revision. Revision Revision.

troublediagnosis andremedies.

87. Repair andmaintenance ofwindow airconditioner.

Window airconditionertheirmaintenancetroublediagnosis andremedies.

-do- -do- -do-

88. Repair andmaintenance of splittype air conditioner.

Splitaircondition-er.Theirmaintenance,troublediagnosis andremedies.

-do- -do- -do-

89.Installation of carA/C compressor,condenser,evaporator, receiver,meteri-ng deviceetc.In the car, hosepipe connection, itsleakage testing,vaccumize and gascharging in car A/csystem. Testing andnoting of all readingsof pressure andtemperature.

Carairconditionerwiring. Theirmaintenance,troublediagnosis andremedies.

-do- -do- -do-

90. -do- -do- -do- -do- -do-91 to102

Industrial Training :Cold store, ice andice-cream plant,central air -conditioning plant(direct and indirectsystem) car airconditioner, dairyplant. Absorptiontype air conditioningplant. Repair andmaintenance ofrefrigerator, window,split air conditioner,bottler cooler, visiblecooler, air cooler anddeep freezer etc.

……………… …………………

…………………..

……………..

103 Revision Revision Revision Revision Revision104. Test. Test. Test. Test.

ACHIEVEMENT : The trainees will be able to :

Service air handling, humidity control and heating apparatus.

Service and operate air conditioning plant (Small capacity)

Repair& Maintenance.

(a) Refrigerator, nonfrost refrigerator and deep freezer.

(b) Bottler cooler-visible cooler-Air cooler and water cooler.

(c) Window air conditioner, Split air conditioner & car air conditioner.

(d) Ice candy plant.

Revised list of tool and equipments for the trade of“Refrigeration & Air Conditioning Mechanic”

(for a batch of 16 trainees)N.B. The nearest metric size or equivalent English size may be

Procured as available.

A. TOOLS LISTSl. No Description Instruc

torTrainees

Total

1. Flaring tools set, single typefor tube 4.7 to 16 mm O.D.

1 set 16sets

17 sets

2. Swaging tool, punch type, setof size , for tube 4.7 to 16mm O.D.

1 set 16sets

17 sets

3. Bending spring external type,for copper tube O.D. 6.4. to16mm.

1 set 16sets

17 sets

4. Pipe cutter miniature forcopper tube 3 to 16 mm dia.

1 no. 16nos.

17nos.

5. Pinch off tool . for coppertube 6 to 18 mm & pinch offpliers.

1 no. each 16nos.each

17 nos.each

6. Ratchet spanner 6.4 mm sq.reversible.

1 no. 16nos.

17 nos.

7. Valve key “T” handle – 4.7and 6.4 mm sq.

1 set 16sets

17 sets

8. Pressure gauge , diameter 63mm with recalibration setscrew, scale 0 to 35kg./sq.cm.

1 no. 16nos.

17 nos.

9. Compound gauge, diameter63 mm with recalibration setscrew, scale vaccum 76 mm,pressure15 kg/sq. cm.

1no. 16nos.

17 nos.

10. Servicemen thermometer inmetal case -30 to + 30 degreeC.

1no. 16nos.

17 nos.

11. Sling psychrometer mounteron aluminium back, scale -50C to + 50 degree portable inleather case.

1no. 16nos.

17nos.

12. Gas leak detector for halogengas ( Electronic)

1no. 16nos.

17nos.

13. Lapping plate 250 * 200mm. 0no. 16nos.

17nos.

14. Line tester 500 volt, heavyduty.

1no. 16nos.

17nos.

15. Tong tester 0-10 30amp ., 0-500volts portable , small sizein leather case .

1no. 16nos.

17nos.

16. Punch hole for cuttinggasket , 4.7 to 16 mm dia.

1 sets. 16sets.

17 sets

17. Scissor, gasket cuttingstainless steel, length 250mm.

1no. 16nos.

17 nos.

18. L-Allen key set, size 1.5 to6.4 mm.

1 set. 16sets.

17sets.

19. T-Allen key set, size 5/32” &1/8”

1 set. 16sets.

17 sets.

20. Screw driver , plastic handle,6mm tip length 100,150

1 set 16sets

17 sets.

21. Screw driver, plastic handle,10 mm tip, length 200, 250mm.

1 set 16sets

17 sets

22. Pliers combination insulated,length 200 mm.

1 no. 16nos.

17 nos.

23. Pliers long nose, length 200mm

1 no. 16nos.

17 nos.

24. Knife folded stainless steel –6”.

1 no. 16nos.

17 nos.

25. Wrench adjustable length 200mm

1 no. 16nos.

17 nos.

26. Wrench adjustable length 250mm

1 set. 16sets

17 sets

27 Spanner, double ended 4.7mm to 16 mm

1 set 16sets

17 sets

28. Ring spanner, off set 4.7 mmto 16 mm

1 set 16sets

17 sets

29. Philips screw driver-completer set in leather case.

1 no. 16nos.

17 nos.

30. Oil can pressure type- 1 litrecan.

1 no. 16nos.

17 nos.

31. Soldering iron exchangeable 1 no. 16 17 nos.

copper tip 65 watts. nos.

32. Tape measuring 2 mgraduation in mm

1 no. 16nos.

17nos.

33. Hammer plastic 300 gm. 1 no. 16nos.

17 nos.

34. Hammer ball pein 450 gm 1 no. 16nos.

17 nos.

35. Hack show tabular metalframe adjustable

1 no. 16nos.

17 nos.

36 File flat medium, double cut,length 200 mm

1 no. 16nos.

17 nos.

37. File half round medium,double cut, length 200 mm

1 no. 16nos.

17 nos.

38. Engineers rule 300 mm long. 1 no. 16nos.

17 nos.

39 Engineers square 200 mmlong.

1 no. 16nos.

17 nos.

40 Chisel flat, length 150 mm 1 no. 16nos.

17 nos.

41. Scriber 150 mm length. 1 no. 16nos.

17 nos.

42. Divider, spring joint length 1 no. 16nos.

17 nos.

43. Caliper spring joint, outsidelength 150 mm

1 no. 16nos.

17 nos.

44. Caliper spring joint, insidelength 150 mm

1 no. 16nos.

17 nos.

45 Caliper odd leg, spring joint,length 150 mm

1 no. 16nos.

17 nos.

46. Centre punch length 100 mm 1 no. 16nos.

17 nos.

47. Bench vise 75 mm jaw. 0 no. 16nos.

17 nos.

48. Flaring tool set, double typefor tube 4.7 to 16 mm O.D.

1 set - set 1 sets

49. Swaging tool, screw type,with adapter set of size forthe tube 4.7 to 16 mm O.D.

1 set - set 1 sets.

50. Pipe bending tool, lever typewith degree indicator fortube O.D. 6.4 to 16 mm

1 set - set 1 sets

51. Pipe cutter with built inreamer and spare cutter for,copper tube 3 to 32 mm.

1 no. - no. 1 no.

52. Refrigerant cylinder capacity2.5 kg.

4 nos. - no. 4 nos.

53 Refrigerant cylinder capacity30 kg.

2 nos. -no. 2 nos.

54. Vaccum pump , two stage,self contained with motorportable, final vac. 0.1 micronwith gas ballistic valve, 0.1splash reducing, non-returnvalve Cap-1/2 HP.

2 nos. -no. 2 nos.

55. Charging cylinder, stainlesssteel, portable cc & mm scale,compensation for vol.fluctuation with pr. Releasevalve, gauge etc.

2 nos. - no. 2 nos.

56. Charging manifold withvalves and gauges.

2 nos. - no. 2 nos.

57. Dial thermometer, remotecontrol, armoured capillarydial 75 mm – 50 deg. C to+50 deg. C.

2 nos. - no. 2 nos.

58. Comfort guide hygrometer 5dg. C to 45 deg. C.

1 no - no. 1 no.

59. Dial thermometer, remotecontrol, armoured capillary,dia. 21/2 ” – 40 degree F to =120 degree F.

2 nos. - no. 2 nos.

60 Temperature and humidityrecorder.

1 no. - no. 1 no.

61. Electronic leak detectortangesterised with visible andaudible indicator sensivity 15g/year.

1 no. - no. 1 no.

62. Vaccum thermo couple gauge1 to 3000 microns.

1 no. - no. 1 no.

63. Velocity meter with extensionhandle air lock.

1 no. - no. 1 no.

64. Stop watch 1 no. - no. 1 no.65. Walt meter AC/DC portable 4 nos. - no. 4 nos.

precision grade teak-woodcase, leather belt- 0 to 500volt.

66. Ammeter AC/DC portableprecision grade, teak woodcase, leather belt- 0 to 5 Amp.

2 nos.- no.

2 nos.

67. Ammeter portable precisiongrade, teak wood case, leatherbelt- 0 to 10 Amp.

2 nos. - no. 2 nos.

68. Ammeter AC/DC portableprecision grade, teak woodcase, leather belt o to 30Amp.

2 nos. - no. 2 nos.

69 Megger – 100 volt. 1 no. - no. 1 nos.70 Variac input 230 volt output

400 volt 1 Amp. Portable,complete with meters andcontrols .

2 nos. - no. 2 nos.

71 Wattmeter, multirange upto 1kw.

2 nos. - no. 2 nos.

72 Multimeter Digitel type. 1 no. - no. 1 no.73. Multimeter Gigital type. 1 no. - no. 1 no.74. Capacitance bridge, direct

reading, 0-200 mfd. Portable,small size in leather case

1 no. - no. 1 no.

75. Teachmeter digital,multirange 0 to 3000 rpm.portable, small size, in leathercase.

1 no. - no. 1 no.

76. Transistor taster. 1 no. - no. 1 no.77. R.C.L. bridge. 1 no. - no. 1 no.78. Filler gauge 0.05 mm–1mm. 1 no. - no. 1 no.79. Wire gauge metric and with

worth.1 no. - no. 1 no.

80. Screw driver, plastic handle,3 mm tip length 100 & 150insulated.

1 no. - no. 1 no.

81 Pliers flat nose length 150mm

1 no. - no. 1 no.

82 Pliers water pump, multi-fixlength 250 mm.

1 no. - no. 1 no.

83. Pliers vice grip length 250 1 no. - no. 1 no.

mm84. Pipe spanner size 250 mm. 2 nos. - no. 2 nos.85. Pipe spanner size 300 mm. 2 nos. - no. 2 nos.86. Wrench adjustable length 150

mm1 no. - no. 1 no.

87. Spanner double ended 19mm to 31.8 mm.

2 sets. - set 2 sets.

88. Instrument screw driver –complete set in leather case.

2 sets. - set. 2 sets.

89. Ring spanner, offset 19 mmto 31.8 mm.

2 sets - set. 2 sets.

90 Flexible-Box spanner size 6.4to 10 mm.

2 sets. - set. 2 sets.

91. Socket set, reversible ratchet,½ square drive with extension4.7 to 31.3 mm

1 set. - set. 1 set.

92. Socket set, reversible ratchet,½ square drive withextension, 3/16” to 11/4”BSW & S.R.

1 set. - set. 1 set.

93. Torque wrench 300 mm, 12.7mm squre drive right and lefthand.

1 set. -set 1 set.

94. Blow-lamp - capacity 1litre 2 nos. -no. 2 nos.95. Puller 3 legged, with flexible

arm 120 mm.2nos. -no. 2nos.

96. Puller 2 legged, with flexiblearm 300 mm.

2nos. -no. 2nos.

97. Platform scale, heavy duty 0to 50 kg.

1 no. -no. 1 no.

98. Blow lamp capacity ½Litre.

4 nos. -no. 4 nos.

99. Soldering Iron, exchangeablecopper tip 25 watts.

1 no. - no. 1 no.

100. Hand blower portablecomplete 1/10 hp.

2 nos. - no. 2 nos.

101. Sprit level precision, metallic200 mm.

1no. -no. 1no.

102. Plum weight 200 g. 1 no. - no. 1 no.103. Tape, measuring 10 m

graduction in mm.1 no. - no. 1 no.

104. Electric drill portable with 1 no. - no. 1 no.

chuck & key capacity 6.4 mm105. Hammer rubber 400 gms. 2 nos. - no. 2 nos.106. Snipper sheet metal straight

nose 200 mm.2 nos. - no. 2 nos.

107. Hammer Ball pein – 200 gms. 4 nos. - no. 4 nos.108. File, half round fine double

cut, length 10 mm.4 nos. - no. 4 nos.

109 File round, fine, double cut,length 150 mm

4 nos. - no. 4 nos.

110 File flat, fine double cut,length 150 mm.

4 nos. - no. 4 nos.

111. File square, fine double cut,length 150 mm.

4 nos. - no. 4 nos.

112. Scribing block, universal,spindle 200 mm.

2 nos. - no. 2 nos.

113. V-Block with stand, 600 *450mm.

2 nos. - no. 2 nos.

114. Surface plate with stand, 600*450 mm.

1 set - set 1 set

115. Micrometer, outsidemeasurement, 0.25 mm.

1 no. - no. 1 no.

116. Micrometer, outsidemeasurement, 25- 50 mm.

1 no. - no. 1 no,

117. Micrometer, insidemeasurement, 25-200 mm.

1 no. - no. 1 no.

118. Vemier height gaige 250 mm. 1 no. - no. 1 no.

119. Angle Plate, 120*100 mm 90degree.

1 no. - no. 1 no.

120. Vernier height gauge 250mm.

1 no. - no. 1 no.

121. Tap set with matching drills 3mm to 16 mm size.

1 set - set. 1 set.

122. Tap set with matching drills¼” to 5/8” SAE size.

1 set - set. 1 set.

123. Stock and die set set 3 mm to16 mm size.

1 set - set. 1 set.

124. Stock & die set ¼ to 5/8”SAE size.

1 set - set 1 set

125. Bench vice 120 mm jaw. 2 nos. - no. 2 nos.126. Air compressor, two stage for

oil – less dry air, with rust1 no. - no. 1 no.

proof tank assembly, heaterand controls max. pr. 10kg/cm2 cap. 45 litre, motor 1HP.

127. Scraper, triangular bladeremovable 60 mm.

2 nos. - no. 2 nos.

128 Descaling pump setcompleter with motor 1 HPand accessories.

1 no. - no. 1 no,

129. Spray outfit, V twin, withmotor ½ HP deliver up to 4cft air pressure up to 40 PSIspray gun and fitting.

1 no. - no. 1 no.

130. Hand shear machine 280 mm. 1 no. - no. 1n0.131. Pillar drilling machine 200 to

2500 rpm. Capacity 20 mm.1 no. - no. 1 no.

132 Pedestal grinder, doubleended wheel dia 200 mm3000 rpm.

1 no. - no. 1 no.

133. Oxy Acetylene welding setcomplete with cylinders,regulators weldingtorcheswith different nozzles.

1 no. - no. 1 no.

134. Gas cylinder truck two wheeltyre.

1 no. - no. 1 no.

135 Welding table 900 * 900*700mm high.

1 no. - no. 1 no.

136. Work bench 1000* 600*800mm high,

4 nos. - no. 4 nos.

137. Almirahs, 195 * 90 * 49 cm. 2 nos. - no. 2 no.138. Lockers of eight

compartments.1 no. - no. 1 no.

139. Chalkboard portable. 1 no. - no. 1 no.140. Instructor table and chair. 1 set - set 1 set.

B. EQUIPMENTS LIST

Srno.

Description No.

1. Refrigerator compression type, 165 litre, differentmake.

2 nos.

2. Refrigerator compression type 300 litre double door,double compressor system.

1 no.

3. Deep Freezer 165 litre, - 18 degree C, ¼ HP. 1 no.4. Window air conditioner capacity 300 k. cal/hr.,

different make.2 Nos.

5. Bottle cooler, 110 litres, 1/6 HP. 1 no.6. Water cooler instantaneous type. 1 No.7. Water cooler, storage type capacity. 1 No.8. Ice-candy unit complete with stainless steel tank,

mould box, thermocole insulated sunmica body,Agitator, compressor, motor eltc. Temp., pressure,refrigerant control. Gauges, motor piping fitting etc.3000 k. cal/hr.

1 No.

9. Cold storage plant complete with all controls andaccessories including cooling tower and watertreatment plant capacity 15000 k. cal/hr.

1 No.

10. Air conditioning plant, direct and indirect & waterchiller, complete with all controls including humiditycontrol etc. capacity 1500 k. cal./hr.

1 No.

11. Condensing unit with hermetic compressor controletc. capacity 500 k. cal./hr.

1 No.

12. Condensing unit, with open type compressor, aircooled condenser controls etc. capacity 750 k. cal,/hr.

1 No.

13. Condensing unit with open type compressor,Evaporative condenser controls, etc. capacity 3000 k.cal./hr.

1 No.

14. Reciprocating compressor with provision of capacitycontrol etc. for demonstration.

1 No.

15. Working model of absorption system of refrigeration,capacity, 500 k. cal./hr.

1 No.

16. Visible cooler, 165 litre.It can accommodate 75 to 80 bottles- N0 Frost-Temperature between 4 C to 8 C.

1 No.

17 Air cooler – 16”(Stainless steel body-Fan size 16”)

1 No.

18. Desert cooler – 20” 1 No.

(Wooden body – Fan size 20”)19. Car A/c compressor – small capacity

(Reciprocating, Vane type Rotary, Axial typecompressor)

1 No. each

20. Condenser, Evaporator,Receiverm Metering device &Hose pipe etc. suitable for to fit in above car A/csystem.

1 set.

21. No frost refrigerator compression type – 165 litre. 1 No.

Note : 1. Item no. 54, 55,56 may be used to develop Gas charging station in theinstitute, other required spares may be provide by institute.

2. Item at serial 16-21 was not included in the existing list of revised syllabus ( revisedin 1982) which is now added as additional item.

C. SPARE PARTS/ACCESSORIESSL. NO. Description.1. Relays2. Capaciteors3. O/L protectors4. Selector switch5. Thermostatic Switch6. Flare fitting7. Expansion valve –Thermostatic/automatic8. Solenoid valve9. High pressure/low pressure cut out10. Oil failure switch11. Liquid Indicator etc.

N.B. The quantities make and specification will depend onthe actual equipment procured in the Institute. In addition to above sparesfor servicing/maintenance, the following units should be procured asrecommended by the manufacture.

1. Condensing Unit2. Cooling Tower3. Water circulating pump4. Water treatment plant5. Air handling unit6. Cooling unit for cold storage7. Different system controls

Note: The list of the spare parts/accessories was included in theExisting list of revised syllabus and is now kept in theRevised list of tools and equipments as they are.

LIST OF REFERENCE BOOKS

1. Principal of refrigeration.(By Roy J. Dossat. John Wiley and Sons Inc.)

2. Refrigeration and Air Conditioning.(By Mayer, and Fittz-Megrow Hill Co,)

3. Air Conditioning & Refrigeration..(BY Jenny and Lewess-International Text Book Co.)

4. Refrigeration and Air Conditioning.(BY Rubber & Hutchson-John Wiley.

5. Hand Book for Refrigeration Enginerrs.(By Welrich & Bart)

6. Refrigeration Service Mnaual.(BY Manely HP, Fredrick J. Drake and Co.)

7. Refrigeration Service Air Conditioning & Cold Storage.((By R.C. Grinther Chilton Book)

8. Refrigeration and Air Conditioning Guide.(By Edmon P. Anderson-Audels- and Co.)

9. Trane Air Conditioning Manual –Trane Co.

10 Carrier Air Conditioning Manual – Carrier Co.

11 Guide and Data Book – American Society of Ref.& Air Con, Eng.12 Hand Book of Fundamental-American Society of Ref. And Air Con.Eng.13 Air Conditioning and Refrigeration.

(By Mr. P.N Anaathanarayanan, M/s Tata Magrawhill Publication)

SYLLABUS FOR THE TRADE OF REFRIGERATION AND AIRCONDITIONG MECHANIC

UNDERAPPRETICESHIP TRAINING SHEME

Period of training : 3 YearsNote: The content of Basic Training is exactly the same as that of Craftsman

Training is this trade. All freshers must undergone two years basictraining before Shop Floor Training.

Subjects : 1. Trade Practical.2. Trade Theory.3. Workshop Calculation and Science.4. Engineering Drawing5. Social Studies.

(1) TRADE PRACTICAL (3RD YEAR)Installation of a complete part including erection , electric wiring, pipe

lay out etc. putting the plant into operation, maintenance and testing ofthe plant. Trouble shooting on the erected plant.

Cold StorageInsulation work of cold storage. Installation of the plant including lay out

of pipe etc.Care and maintenance of the plant.Repair of compressor and auxillary equipment at site.

R- Insulation work of Milk/Dairy Refrigeration. Installation of themilk/dairy palnt. Including layout of the pipe etc. Care and maintenanceof the milk/dairy refrigeration plant.

Air Conditioning.

Constructional features of air conditional space. Heat insulation, sealing of door,window etc. Installation of air conditioning plant for industrial and commercialpurpose – factory, picture house, hotel, office etc. stripping overhauling andrepairing of the plant. Window air conditioner, split air conditioner plant.Window air conditioner, split air conditioner plant-ductable and nonductable,overhauling and maintenance.

R- Constructional features of car/auto/transport airconditoned/refrigeration.Installation of car/auto/transport airconditioning/refrigeration components-electric wiring, hose pipe connection-putting the car/auto/transportairconditioned/refrigeration into operation.Maintenance and testing of the car/auto/transport airconditoned/refrigeration.Trouble shooting etc.

Use of different types of instruments and controls in the refrigeration syste,.

Overhauling and maintenance of refrigerator, deep freezer, water cooler, bottlecooler-visible cooler 7 Ice-candy.

TRADE THEORY 93 rd Year)

Vapour compression cycle-Pressure enhlaphy diagram refrigeration effect,mass flow rate of refrigeration, compressor displacement. Heat ofcompression., HP per Ton, co-efficient of performance. Heat rejected perTon at condenser. Effect of vapoursing and condensing temperature oncycle efficondenser. Effect of vapourising and condensing temperature oncycle efficiency. Liquid sub-cooling and suction super heat. The effect ofsuction super heat and pressure drop on co-efficient of performance.

R- Milk/dairy refrigeration plants constructional feature andcapacity. Cooling arrangements specifications of milk/milkproduct-operation and maintenance of milk/dairy refrigerationplant.

R- Car/auto/transport refrigeration/airconditioning components.Feature-cooling arrangements & use of components and parts.

Cooling Load Calculation

Calculating transmission load solar heat, gain load and wall gain loadfactor determining wall gain load, calculating air change load, calculatingproduct load-chilling rate factor, respiration heat. Container and packingmaterial calculating miscellaneous load safety factor etc.

Cold Storage

Type of cold storage-Constructional feature of cold storage, heat insulation,opening doors etc. their position capacity and specification of a cold storage.Refrigerant used. Heat leakage, method of cooling, direct arrange ofexpansion, valve, cooling by brine circulation Air circulation. Operationand maintenance of cold store.

Effect of low various and high humidity.

Air Conditioning.

Composition of atmospheric air, psychrometric chart, comfort condition.Source of heat leakage in air conditioning space. Heat load, heat insulation,selectiuon of air conditioning plant and its specification, working ofdomestic and industrial air conditioning plant and its specification,working of domestic and industrial air conditioning plant and theirdistinctive feature. Name and function of various components parts.

Humidifier and dehumidifier-their description and use.

Air heating – various method of heating air, as used in iudustry.

Air washer-types construction, working maintenance, Types of desertcoolers, their maintenance.

Ice-plants-Constructional feature and capacity. Cooling arrangements,specification of Ice,Ice-defect. Care and precaution to be observed in themanufacture of Ice. Operation and maintenance of the Ice plant.

At the completion of training the apprentice should be able to do :

1. Servicing of domestic and plotting of graph.Mensuration problem applicable to trade.

Applied problems on algebra and trigonometry, Calculation ofrequirement of materials for cold storage, pipe layout, Insulation, brine layoutetc.

Calculation of materials for Ice plant.

Fluid mechanics-Surface tension and viscocity of fluids, laws of fluids, laws offluid flow. Flow of fluid and distribution in pipes and fitting, fricxtion factors,losses in pipes and fittings, capillary flow compressibility of fluids.

Problems on work, energy, power, transmission of motion and power.

Applied heat-Problem on calorimetry and heat transfer and heat load, andproblems on gas laws etc.

(4) ENGINEERING DRAWING (3 rd Year)

Reading and sketching of mechanical drawing of refrigeration & airconditioning system.

Reading and sketching of electrical wiring diagram of refrigeration and airconditioning system.Reading of layout drawing of air conditioning plant, including pipe work,ducting etc.

Reading of layout drawing of cold storage, including mechanical handlingarrangements etc.

(5) SOCIAL STUDIES.

The syllabus has already been approved and is same for all trades.