Daikin launched the VRV air conditioning system in 1982 and in doing so introduced the world’s first use of variable refrigerant flow control. This technology circulates only the minimum amount of refrigerant needed at any one time and enables individual climate control of air conditioning zones. The name VRV is derived from this technology – Variable Refrigerant Volume. Ever since Daikin has been the leading pioneer in VRF/VRV technology paving the way for other VRF manufacturers to try and mimic what Daikin has already accomplished.
Daikin VRV features true zoning utilizing many individual air handlers or “heads” to condition certain zones of a building. With a wide variety of heads (from concealed ductless, floor standing, or traditional ducted heads) each individual head is tailored to fit the particular zone it is conditioning. Each head receives the minimum amount of refrigerant at any one time to condition the appropriate amount of load the zone is calling for. Because all of the heads work in this manner Daikin VRV systems take full advantage of part load conditions or the exact amount of heating/cooling individual zones call for at any one time and not on the conventional system peak load designs where the system is designed to condition as if all areas are calling for worse case load removal. Not only does this decrease energy consumption but also better maintains the temperature set point continuously.
Daikin VRV systems are extremely quiet. Advanced analytic technologies including CFD and FEM are utilized to optimize fan design and increase airflow rate and external static pressure without increasing operation sound. The average outdoor unit has a dBA range of 58-61 while the average indoor unit has a dBA range of 27-43 depending on the head selected. In addition because Daikin VRV systems have far less ductwork or are even ductless the possibility of noisy ductwork or bad design is substantially reduced.
The Daikin VRV-IV has an unheard of 28 IEER rating. Daikin VRV systems are extremely efficient because they take advantage of ‘part load’ conditions and not ‘peak load’ conditions like conventional systems. This means instead of the system being designed to work in it’s worse-case and wasting a lot of energy when the load does not require the system to do so (about 70-80% of the time) Daikin VRV systems modulate their capacity to meet the exact load conditions at any time. This also maintains a constant set indoor air temperature.
VRV IV-S’ revolutionary Variable Refrigerant Temperature control automatically adapts to the unique requirements of your building and climate, significantly reducing seasonal operational cost compared to conventional systems. Customize your operation between Automatic Mode, High Sensible Mode or Basic Mode to suit the application’s needs. As outdoor temperature falls, the capacity of the system is adjusted by reducing the speed of compressors AND by increasing the evaporation temperature. This increases both comfort and efficiency by maintaining a constant indoor temperature (less than 1F swings) and lowers compression ratio/maintaining optimal compressor speed.
Simultaneous Heating and Cooling
Daikin VRV-IV equipment can simultaneously heat and cool at the same time. The system can heat certain heads or zones that are calling for heating while cooling other heads or zones that require cooling. This is generally referred to as “heat recovery”. Conventional systems can only be in a single mode at any one time. Daikin VRV systems “recycle” excess heat from one area and supply it to another area requiring heat. This constant recycling can increase the systems efficiency by 50% or more!
Architectural Design Flexibility
Because VRV systems cut out a lot of unnecessary duct work architects and designers have much more flexibility crafting their art. VRV applications are especially great for updating HVAC systems in historic buildings where the original integrity of the building is desired as well as modern homes that have very little to no attic space to run ducting thru.
Outdoor Unit Flexibility
VRV IV systems have the unique ability to bring the outdoor condenser indoors!
Single or Three Phase Option
Depending if you would like to design your VRV system with single or three phase power Daikin has many options. The Daikin VRV-IVS series is Daikin’s answer to single phase VRF systems supporting a three, four, or five ton condenser. The Daikin VRV-IV series is Daikin’s three phase series which supports between six to 38 ton condensers.