Air Cooled Chiller NSI 1251-5403

Cooling capacity:
262 ÷ 1249 kW

General Information :

Air/water inverter chiller for outdoor installation. Suitable for air-conditioning and the production of hot water for large-sized services in residential, commercial and industrial buildings.

NSI is a chiller with 1, 2 or 3 circuits charged with R134a gas. It has axial fans to ensure the quietest possible machine operation, the latest inverter twin-screw compressors, a tube bundle heat exchanger and finned pack copper/aluminium coils. The unit with several refrigerant circuits is designed to provide the maximum yield when fully charged, but also guaranteeing excellent efficiency even with partial charging and ensuring continuity if one circuit or more stops operating. The machine cools water to supply the distribution system that is usually connected to fan coil type terminals. In addition, NSI can also produce domestic hot water if it is fitted with a desuperheater or total recovery system, so it’s ideal for residential, commercial and industrial contexts. There are 2 versions – standard and high efficiency.

High Efficiency also at Partial Loads

Inverter Twin Screw Compressors

Operating limit up to 46oC Ambient

100% running test at factory

  • R134a refrigerant
  • Cooling only
  • Inverter twin screw compressor
  • Axial fan
  • Shell and tube exchanger
  • Heat recovery
  • Electronic Expansion Valve
  • Low noise version available
  • Compatible with Modbus protocol
  • Microprocessor with keypad and LCD display


NSI 1251-5403

Catalog :

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