Transcription of HVAC Variable Refrigerant Flow Systems
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HVAC Variable Refrigerant Flow Systems
HVAC Variable Refrigerant Flow Systems Course No: M03-014 Credit: 3 PDH A. Bhatia Continuing Education and Development, Inc. 9 Greyridge Farm Court Stony Point, NY 10980 P: (877) 322-5800 F: (877) 322-4774 Variable Refrigerant Flow (VRF) Systems Variable Refrigerant flow (VRF) is an air-condition system configuration where there is one outdoor condensing unit and multiple indoor units. The term Variable Refrigerant flow 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 a single condensing unit . The arrangement provides an individualized comfort control, and simultaneous heating and cooling in different zones.
the speed to follow the variations in the total cooling/heating load as determined by the suction gas pressure measured on the condensing unit. The capacity control range can be as low as 6% to 100%. Refrigerant piping runs of more than 200 ft are possible, and outdoor units are available in sizes up to 240,000 Btuh.
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