Luchtgekoelde koelmachines met vrije koeling

Koelcapaciteit 51 - 177 kW

ARIES FREE COOLING is the series of air cooled chillers with integrated free cooling with scroll compressors, designed by MTA for outdoor installation with R407C refrigerant gas. The free cooling technology is particularly suitable when the requirement for cooled water and the conditioning of environments is necessary throughout the year. It involves exploiting, in winter and in the intermediate seasons, the low temperature of the outside air to cool either completely or in part the process fluid normally cooled by the chiller through the use of refrigeration compressors, obtaining high energy savings when compared to traditional solutions. With complete independence, the microprocessor control of the ARIES FREE COOLING units manages, according to requirement, the gradual switching-off of the compressors and the fans, minimising energy consumption. In order to maximise the useful effect of the free-cooling, these units are equipped with condensing sections independent of those of free-cooling through the use of fans and special finned coils, unlike the solutions traditionally available on the market in which the free cooling batteries are superimposed on the condensing ones and supplied with a single system of fans.


 Mode Compressor  Koudemiddel  Warmtewisselaar  Fan
 Cooling  Scroll compressor  R407C  Plate heat exchangerImmersed finned coil Axial fan


  • Reduced overall dimensions
  • Reduction of the working hours of the compressors
  • Greater reliability of the system
  • High energy savings
  • Condensing section and free cooling section are separated to achieve maximum efficiency

Technical specifications

  • Galvanised carbon sheet steel and polyester powder coated R407C refrigerant
  • High energy efficiency scroll compressors
  • Phase monitor and crankcase heater
  • Finned coils with copper pipes and aluminum fins generously dimensioned
  • Axial fans with optimised profile to reduce noise levels
  • Brazed plate heat exchangers in AISI 316 stainless steel or immersed finned coil with high energy efficiency and low water pressure drops
  • Condensing section and free cooling section are separated to achieve maximum efficiency Integrated hydraulic circuit composed of: water finned coils, motorised three-way valve with proportional control, single or double circulation pump with medium and high available head pressure, storage tank, expansion vessel.

Acoustic versions

  • N - standard acoustic version
  • SN - silenced acoustic version
  • SSN - super silenced acoustic version


  • Electronic thermostatic expansion valves
  • Single or double pump with medium and high available head pressure
  • Integrated storage tank
  • Electronic fans speed control
  • Compressors suction and discharge valves
  • Remote control
  • Filters on condenser coils
  • Monitoring system