Maricopa Community Colleges  HVA103LL   20036-20036 
Official Course Description: MCCCD Approval: 06/17/03
HVA103LL 20036-20036 LAB 1 Credit(s) 3 Period(s)
Refrigeration Applications and Components II Lab
Pressure-enthalpy evaluation of operating systems from a simple saturated cycle to actual operating conditions. System performance evaluation including evaporator superheat, adjustments of suction pressure regulators and compressor crankcase pressure regulator, and evaluation of refrigerant piping. Prerequisites: None. Corequisites: HVA103.
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MCCCD Official Course Competencies:
 
HVA103LL   20036-20036 Refrigeration Applications and Components II Lab
1. Explain pressure-enthalpy analysis of a refrigeration system. (I)
2. Evaluate evaporator superheat to determine and make necessary adjustments. (II)
3. Set and adjust refrigerant flow controls. (III)
4. Set and adjust oil return systems. (IV)
5. Evaluate refrigerant piping for proper system operation and oil return. (V)
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MCCCD Official Course Outline:
 
HVA103LL   20036-20036 Refrigeration Applications and Components II Lab
    I. Pressure-enthalpy analysis
        A. Simple saturated cycle
        B. Actual operating cycle
        C. System diagnostics
      II. Evaporator superheat
          A. Correct valve application
          B. Correct sensing bulb installation
          C. Correct refrigerant charge
          D. System diagnostics and setting
        III. Refrigerant flow controls
            A. Evaporator pressure regulator
            B. Crankcase pressure regulator
            C. Head pressure control
            D. Defrost control
            E. Hot gas bypass
            F. Heat reclaim valves
            G. Solenoid valves
          IV. Oil return system
              A. Single compressor system
              B. Mulit-compressor system (parallel)
            V. Refrigerant piping
                A. Single compressor system
                B. Multi-compressor system
                C. Suction lines
                D. Hot gas lines
                E. Liquid lines
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