MTA Chiller | Neptune Tech Water-Cooled Water Chiller

Water-cooled water chillers featuring hermetic scroll compressors with R410A. Nominal cooling capacity 224 - 583 kW. Nominal heating capacity 263 - 686 kW

The Neptune Tech water cooled water chiller range is the specific solution for medium and large air conditioning applications. Offers the optimal combination of energy efficiency, ease of use and superior quality. The application of up to 6 scroll compressors within up to 2 independent circuits ensures peace of mind together with excellent partial load energy savings and lowest noise levels. Energy savings can be further enhanced by opting for total heat recovery or the desuperheater configuration. Neptune Tech’s compact configuration allows it to even pass through a domestic door, further simplifying installation. The robust industrial design featuring renowned components, unloading function and wide operating limits combine to offer guaranteed operation in all conditions.


  • Up to 6 compressors offer high efficiency and reliability;
  • High energy efficiency levels, especially at partial loads;
  • Extremely compact, even passes through a domestic door;
  • Operates with water outlet temperatures from 0 °C to 25 °C;
  • Unloading function allowing operation even in extreme conditions;
  • Robust design with high quality components from renowned suppliers, fruit of MTA’s industrial background;
  • Eurovent certified performance;
  • Reduced noise levels, thanks also to the availability of two differing acoustic versions;
  • Flexibility of use, sized for operation with either tower or well water;
  • Energy efficient total heat recovery and desuperheater options;
  • Easy installation and access to all components;
  • Allows both inlet and outlet water control, with a PID control logic;
  • Generous ambient limits (-10 °C to +45 °C);
  • Easy to use intuitive controller with dual icon display.

Standard Features

  • 3 to 6 hermetic scroll compressors, positioned in parallel in one or two circuits;
  • Brazed stainless steel plate evaporators and condensers;
  • Electronic expansion valve;
  • Extensive inspections and tests performed on all units; • Factory charged with non-freezing oil and refrigerant; • IP54 electrical protection rating; • Refrigerant R410A; • All the scroll compressors are equipped with cranckcase heaters as standard; • All the units are delivered with a phase monitor which provides protection against phase loss and phase reversal.


  • Noise reducing compressor housing;
  • Modulating condensing pressure control valves;
  • Antivibration dampers;
  • Heating functioning mode with water side cylce reversion;
  • Soft starter;
  • Desuperheater (20% heat recovery);
  • Total heat recovery (100% heat recovery);
  • Antifreeze heater for exchangers;
  • Remote user interface;
  • RS485 MODBUS interface for connection to supervisor systems;
  • xWEB300D EVO supervision system.

To find out more about our MTA range, get in touch

Process Engineering


Air Conditioning