National Instructional Media Institute (NIMI) creator text xxu Chennai National Instructional Media Institute (NIMI) 2010,c2008 monographic eng

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130 Contents : 1.Practical -Practical safe method – Fire fighting -Identify common Basic Refrigeration tools with specification and function -Setting of Oxy -aceteylene flame -To Unroll ,Cut and Bend soft copper tubing -To swage and make a brazed join on copper tubing of same size -To make flare joints and test them with flare fitting -Check compressor efficiency and the operational condition of a compressor -Measure the current of a given load in an AC circuit without interrupting connecting (Tong – Tester ) -Identify various Refrigerant with Cylinder and valves -Trace the electrical wiring circuit -Check and service tempreture and pressure controls (low pressure switch,solenoid) -Check and service high pressure safety cut out oil pressure safety cutout -Check and cut all the Gaskets and assemble the commercial compressor -De – scale the shell and tube condensor – Identify and Arrest the tube leaks -Check and service the dry type evapourator -Pump down ,Pressure test,Leakarrest,evacuate ,charge or topup the gas -De – Scale Air handdling Unit (AHU) Chilled water coil -Check and service,attend the fault in cooling tower water circulation pump -Check and maintain the quality of chilled water -Clean cooling tower and accessories ,replace and rectify problems 2. Theory -Safety practice – Fire extingushers -Common basic Refrigeration tools and their functions -Setting of Oxy – Acertylene flame -Tubling – Cuttinf and Bending methodology Swaging -Flaring ,Flare fittings and testing the joints -Efficiency and testing of commercial reciprocating compressor -Measuring voltage and current using multi meter -Refrigerants -History, Classification ,Properties ,Environment -Central Air -Conditioning plant wiring circuit -Temperature and pressure controls -High pressure safety cutout ,safety valve and Oil pressure cut -out -Classification of commercial compressor and the gasket -Descaling in shell and tube condensor -Dry expansion Evapourators -Transfer refrigerant to shell and Tube condensor -Air Handling Units & air washer in Air – conditioning plants -Water circulation pumps -Chilled water treatment -Cooling Towers 3.Assignment & Test Refrigeration & Air Conditioning : MES A C Plant 621.57 SER MES52 National Instructional Media Institute (NIMI) BSDU 170710 20190503161031.0 English