VRF systems is a all-electric technology consists of a single outdoor condensing unit, multiple indoor units serving various zones, refrigerant piping with branch selectors, and associated controls.
Major Components:
VRF Outdoor Unit
VRF Indoor Unit
Refrigerant Pipelines
Control Cable
Ductwork (if applicable)
VRF systems Major advantages:
Good zoning control
Individual temperature control
Minimized ductwork,
Excluding the need for secondary fluids (chilled-water)
Very high energy efficiency ratio (EER) of 15 to 20
Integrated energy efficiency ratio (IEER) of 17 to 25.
They are 20% to 30% more efficient than conventional HVAC systems due to partial load operation, speed modulation, zoning capabilities, and heat-recovery technology.
VRF systems Disadvantages:
The need for a dedicated ventilation system to deliver the outside air to various zones
Long refrigerant lines and a large number of branch connections could result in refrigerant leakage
The need for condensate drain lines for each VRF indoor unit
Compliance with maximum allowable refrigerant quantities within a given volume.
Malaysia
