COURSE OVERVIEW:

Central air conditioning systems and large-scale chillers are the primary components responsible for thermal comfort and process cooling in modern industrial and commercial facilities. This course provides a comprehensive exploration of the refrigeration cycle and the mechanical assemblies that constitute these high-capacity systems. Participants will examine the technical interplay between compressors, evaporators, condensers, and expansion devices to understand how heat is efficiently moved and rejected.

The scope of this training encompasses the diverse range of chiller technologies, including air-cooled and water-cooled configurations. We will analyze the specific requirements for different refrigerants and the lubricants required for their operation. The course emphasizes the importance of heat exchanger cleanliness and the impact of fouling on overall system efficiency, providing a clear roadmap for maintaining peak performance throughout the equipment’s lifecycle.

Coverage includes advanced fault-finding methodologies designed to identify the root causes of system inefficiencies or mechanical failures. Attendees will learn how to interpret pressure-enthalpy diagrams and utilize modern diagnostic tools to troubleshoot complex refrigeration circuits. By the end of this course, participants will be equipped with the skills to implement proactive maintenance programs that reduce energy consumption and prevent costly emergency repairs.

COURSE OBJECTIVES:

After completion of this course, the participants will be able to:

1. Explain the fundamental refrigeration cycle and the state changes of refrigerants.
2. Differentiate between centrifugal, screw, and reciprocating chiller technologies.
3. Identify the major components of a central air conditioning air-handling unit.
4. Execute proper startup and shutdown sequences for large-scale chillers.
5. Perform comprehensive leak detection and refrigerant recovery procedures.
6. Evaluate the performance of condensers and evaporators through approach temperatures.
7. Manage water chemistry requirements for cooling towers and chilled water loops.
8. Diagnose electrical control circuit faults and sensor inaccuracies.
9. Implement energy-saving strategies for variable speed drive (VSD) chillers.
10. Interpret chiller performance logs to identify early signs of mechanical wear.
11. Utilize pressure and temperature data to troubleshoot expansion valve malfunctions.
12. Execute mechanical maintenance on compressor oil systems and filters.
13. Develop a systematic fault-finding guide for common chiller alarm conditions.

TARGET AUDIENCE:

HVAC Technicians, Facilities Engineers, Maintenance Supervisors, and Plant Operators are responsible for large-scale cooling systems.

TRAINING COURSE METHODOLOGY:

A highly interactive combination of lectures, discussion sessions, and case studies will be employed to maximise the transfer of information, knowledge, and experience. The course will be intensive, practical, and highly interactive. The sessions will start by raising the most relevant questions and motivating everybody to find the right answers. The attendants will also be encouraged to raise more of their questions and to share in developing the right answers using their analysis and experience. There will also be some indoor experiential activities to enhance the learning experience. Course material will be provided in PowerPoint, with necessary animations, learning videos, and general discussions.

The course participants shall be evaluated before, during, and at the end of the course.

COURSE CERTIFICATE:

The National Consultant Centre for Training LLC (NCC) will issue an Attendance Certificate to all participants who complete a minimum of 80% of the total attendance time requirement.