14/06/2026
Now : Variable Refrigerant Flow Proficient Course
Day 1: Fundamentals of Cooling Systems
• Overview of the cooling cycle and key terminology (ANSI/ASHRAE/ACCA Standards)
• Essential components: compressor, condenser, evaporator, and expansion device
• Types of compressors and their applications
• Types of condensers and their functions
• Types of evaporators and their roles
Day 2: Refrigeration Cycle and Load Calculations
• Types of expansion devices and their characteristics ( Thermal – Electronic)
• Pressure-enthalpy (P-h) diagram of the refrigeration cycle
• Psychrometric chart and air properties
• Classification of heating loads
• Types of cooling systems and their applications
Day 3: HVAC Systems and VRV/VRF Overview
• VRF /VRV Difference
• VRF system compenent, and arrangements
• Fan coil unit components and functionality
• Introduction to inverter air conditioners
• Overview of VRV/VRF systems
• Types of VRV/VRF configurations
• VRF installation procedures and techniques and required tools
• Inverter Scroll compressor VS Digital scroll compressor and Electronic expansion VS thermal expansion valve
• Key components of VRV/VRF systems
• Heat recovery vs Heat pump
• Electrical components in VRV/VRF systems
Day 4: VRV/VRF Control and Maintenance
• VRV/VRF control system components
• Understanding VRV control panel operation
• Understanding VRV electrical panel operation
• Introduction to maintenance and failure diagnostics
• Routine maintenance procedures for VRV/VRF systems
Day 5: Inspection, Safety, and Troubleshooting
• Inspection of VRV/VRF components using HVAC instruments (clamp meter, multimeter, pressure gauges, insulation tester, infrared thermometer)
• Safety protocols and preliminary checks before maintenance
• Identifying common HVAC unit problems
• VRV/VRF troubleshooting steps and preventive maintenance strategies