STANDARD COMPETENCIES:

 

 I.      Identify different types of cases, coolers, and freezers used in commercial systems

 II.     List differences between commercial, residential, and industrial refrigeration

 III.    Discuss the needs for refrigeration to preserve food, provide process cooling in manufacturing, and allow long term storage for research

 IV.     Describe special refrigeration systems for snow making and the transportation industry

 V.      Explain the importance of temperature and humidity control in food preservation

 VI.     List employers in the commercial refrigeration industry

 VII.    Develop a list of potential customers for a commercial refrigeration company

 VIII.   Identify working conditions, wages, benefits, and responsibilities of a commercial technician

 IX.     Complete a list of desirable characteristics of a commercial refrigeration technician

 X       Classify compressors used in commercial refrigeration by the type of drive used, the designed temperature range and methods of cooling compressors

 XI.     Compare the operation of reciprocating, centrifugal, rotary, screw and scroll compressors

 XII.    Identify types of capacity control used on commercial compressors

 XIII.   Distinguish between the different methods of lubricating compressors

 XIV.    Identify routine maintenance procedures required on commercial compressors

 XV.     Disassemble, explain, assemble, pressure test, efficiency test, and operate a. commercial compressor

 XVI.    Demonstrate methods of reclaiming the refrigerant from a commercial unit

 XVII.   Select the proper sequence to isolate the refrigerant charge in the system

 XVIII.  Calculate the capacity of a reciprocating compressor using the RPM and displacement of the cylinders

 XIX.    Describe common types of air cooled condensers

 XX      Perform maintenance procedures on air cooled condensers including cleaning and straightening fins

 XXI.    List factors which affect the efficiency of air cooled condensers

 XXII.   Select correct operating temperatures and pressures for air cooled condensers

 XXIII.  Describe methods of head pressure control on outdoor air cooled condensers in low ambient conditions

 XXIV.   List installation requirements for air cooled condensers

 XXV.    Describe common types of water cooled condensers

 XXVI.   List factors which affect the efficiency of water cooled condensers

 XXVII.  Perform maintenance procedures on water cooled condensers

 XXVIII. Determine correct temperatures and pressures for water cooled units

 XXIX.   Explain how head pressure is controlled on water cooled units

 XXX     Discuss methods of heat reclaim employed on water cooled and air cooled condensers

 XXXI.   Explain maintenance procedures for cooling towers

 XXXII.  Identify air cooling and submerged evaporators

 TOPICAL OUTLINE:

 

 I.      Commercial Refrigeration Systems

 II.     Commercial Compressors

 III.    Condensers

 IV.     Evaporators

 V.      Metering Devices

 VI.     Refrigerants

 VII.    Commercial Wiring And Controls

 VIII.   Commercial System Accessories

 IX.     Ice Machines

 X       Commercial Heat Load Calculations And Pipe Sizing

 XI.     Troubleshooting Commercial Systems