System controller for full-store control, monitoring with alarms and extensive history, the AK-SC 255 offers sophisticated energy saving functions. Interfaces with EKC and AK controllers and supports AK input-output modules. Applied in convenience stores, small shops, supermarkets, and hypermarkets. Flexible and expandable, provides control and monitoring functions at any level: Refrigeration only, HVAC only or full-store control. Up to 5 suction groups and up to 40 circuits per suction group; a choice of strategies for control of various condenser types. Can control up to 30 lighting zones and up to 40 HVAC systems. Boolean logic processor included. Versions with or without display. Supports a wide range of network protocols.