Maricopa Community Colleges  JCI126   19996-20086 
Official Course Description: MCCCD Approval: 07/22/08
JCI126 19996-20086 LEC 2.50 Credit(s) 2.50 Period(s)
Centrifugal Chiller Operation and Maintenance
Components and their purpose within the chilled water system. Life support systems. Operational guidelines and capacity control methods for centrifugal chillers. Auxiliary equipment. Preventative, predictive and proactive maintenance. Troubleshooting procedures.
Prerequisites: JCI120 or permission of Instructor.
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MCCCD Official Course Competencies:
 
JCI126   19996-20086 Centrifugal Chiller Operation and Maintenance
1. Describe components and their purpose within a chilled water system. (I)
2. Identify the key factors of the life support systems. (II)
3. State the operational guidelines of a centrifugal chiller. (III)
4. Describe methods of capacity control for a centrifugal chiller. (IV)
5. Identify auxiliary equipment of a centrifugal chiller. (V)
6. Select and demonstrate the proper and effective preventive maintenance routine for a centrifugal chiller. (VI)
7. Select and demonstrate the effective predictive and proactive maintenance package for a centrifugal chiller. (VII)
8. Demonstrate troubleshooting procedures for centrifugal chillers. (VIII)
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MCCCD Official Course Outline:
 
JCI126   19996-20086 Centrifugal Chiller Operation and Maintenance
    I. Components and Purpose
        A. Refrigerants
        B. Evaporator
        C. Compressor
        D. Condenser
        E. Economizer
        F. Metering device
        G. Control panel
        H. Purges
        I. Starters
      II. Life Support Systems
          A. Lubrication
            1. circuit
            2. greasing and oiling
            3. oil cooling
          B. Purge system
          C. Motor cooling
        III. Operation
            A. Temperatures, pressures and levels
            B. Levels of load
            C. Voltage and current
            D. Number of starts per day
            E. Sound, noise and vibration
            F. Correct water flow rates
          IV. Capacity Control
              A. For inlet vanes
              B. Load limiter
              C. Demand limiter
            V. Auxiliary Equipment
                A. Cooling tower
                B. Pumps
                C. Cooling coil
              VI. Preventative maintenance
                  A. Handling refrigerants
                  B. Moisture
                  C. Drying, field assembly, leaks
                  D. Vacuum pressures
                  E. Microns
                  F. Lubrication system
                  G. Purge unit
                  H. Tube cleaning
                  I. Filters, starters, pumps
                  J. Cooling coils
                VII. Predictive and Proactive Maintenance
                    A. Vibration analysis
                    B. Oil analysis
                    C. Motor current analysis
                    D. Refrigerant analysis
                  VIII. Troubleshooting
                      A. Methods
                      B. Centrifugal chiller
                      C. Cooling tower
                      D. Pumps
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