Controllers

INT975 SD3 electronic control unit for multi compressor packs with RS485 interface

• Article No.

  52 G300 S24 

• Application

  The KRIWAN INT975 SD3 electronic control unit for multi-compressor packs is an intelligent multi-stage controller using microprocessor technology for demand-oriented control of refrigerant compressors.

• Functional description

  The INT975 SD3 electronic control unit for multi-compressor packs controls up to 13 compressor levels depending on demand. Control is either via the suction pressure or the fluid temperature, using a pressure transducer or a Pt1000 sensor, respectively. Energy consumption can be optimised by modulating the set value. For connecting and disconnecting compressors you may choose between the patented KRIWAN random selection or the numeric connection. The pump is controlled with a relay; the lead time is adjustable.