Transcription of HVAC Multi-Split Variable Refrigerant Flow (VRF) Systems
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HVAC Multi-Split Variable Refrigerant Flow (VRF) Systems
PDHonline Course M394 (2 PDH)HVAC Multi-Split Variable RefrigerantFlow (VRF) Systems2012 Instructor: A. Bhatia, Online | PDH Center5272 Meadow Estates DriveFairfax, VA 22030-6658 Phone & Fax: Approved Continuing Education PDH Course M394 HVAC Multi-Split Variable Refrigerant Flow (VRF) Systems A. Bhatia, VRF ( Variable Refrigerant flow) is an air-condition system configuration where there is one outdoor condensing unit and multiple indoor units. The term Variable Refrigerant flow (VRF) refers to the ability of the system to control the amount of Refrigerant flowing to the multiple evaporators (indoor units), enabling the use of many evaporators of differing capacities and configurations connected to single condensing unit. The arrangement provides an individualized comfort control, and simultaneous heating and cooling in different zones . Currently widely applied in large buildings especially in Japan and Europe, these Systems are just starting to be introduced in the The VRF technology/ system was developed and designed by Daikin Industries, Japan who named and protected the term Variable Refrigerant volume (VRV) system so other manufacturers use the term VRF " Variable Refrigerant flow".
• Multi-splits are suitable for single thermal zone* applications with very similar heat gains / losses. Drawbacks • Inability to provide individual control; • Multi-split systems turn OFF or ON completely in response to a single thermostat/control station, which operates the whole system. These systems are
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