National Instructional Media Institute (NIMI) <br/><br/>
Service & Maintenance of Air Conditioning Plant : Modular Employable Skills 

 - Chennai  National Instructional Media Institute (NIMI)  2010,c2008 
 - 130 
<br/><br/>Contents : <br/>1.Practical<br/>-Practical safe method – Fire fighting <br/>-Identify common Basic Refrigeration tools with specification and function <br/>-Setting of Oxy -aceteylene flame<br/>-To Unroll ,Cut and Bend soft copper tubing<br/>-To swage and make a brazed join on copper tubing of  same size<br/>-To make flare joints and test them with flare fitting <br/>-Check compressor efficiency and the operational condition of a compressor <br/>-Measure the current of a given load in an AC circuit without interrupting connecting (Tong – Tester ) <br/>-Identify various Refrigerant with Cylinder and valves<br/>-Trace the electrical wiring circuit <br/>-Check and service tempreture and pressure controls (low pressure switch,solenoid)<br/>-Check and service high pressure safety cut out oil pressure safety cutout<br/>-Check and cut all the Gaskets and assemble the commercial compressor<br/>-De – scale the shell and tube condensor – Identify and Arrest the tube leaks <br/>-Check and service the dry type evapourator<br/>-Pump down ,Pressure test,Leakarrest,evacuate ,charge or topup the gas <br/>-De – Scale Air handdling Unit (AHU) Chilled water coil <br/>-Check and service,attend the fault in cooling tower water circulation pump <br/>-Check and maintain the quality of chilled water<br/>-Clean cooling tower and accessories ,replace and rectify problems<br/><br/>2. Theory<br/>-Safety practice – Fire extingushers <br/>-Common basic Refrigeration tools and their functions <br/>-Setting of Oxy – Acertylene flame <br/>-Tubling – Cuttinf and Bending methodology<br/>Swaging<br/>-Flaring ,Flare fittings and testing the joints<br/>-Efficiency and testing of commercial reciprocating compressor<br/>-Measuring voltage and current using multi meter<br/>-Refrigerants -History, Classification ,Properties ,Environment <br/>-Central Air -Conditioning plant wiring circuit <br/>-Temperature and pressure controls<br/>-High pressure safety cutout ,safety valve and Oil pressure cut -out <br/>-Classification of commercial compressor and the gasket <br/>-Descaling in shell and tube condensor<br/>-Dry expansion Evapourators <br/>-Transfer refrigerant to shell and Tube condensor<br/>-Air Handling Units & air washer in Air – conditioning plants<br/>-Water circulation pumps<br/>-Chilled water treatment <br/>-Cooling Towers <br/><br/>3.Assignment & Test  
<br/><br/><label>ISBN: </label>MES52 
<br/><br/><label>Publisher. No.: </label> National Instructional Media Institute (NIMI) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Refrigeration & Air Conditioning : MES<br/>A C Plant
<br/><br/><label>Dewey Class. No.: </label>621.57  / SER