CAREL’s know-how in natural refrigerant applications has led to the design of a new pRACK series control system, bringing the latest innovations in carbon dioxide refrigeration to the established reliability of a product developed for the management of refrigerating units.
Description:
pRack pR300T is the complete CAREL controller for managing centralised CO2 refrigerating units.
It is the ideal solution for multiple market requests regarding:
- High number of inputs and outputs for control needs
- Innovative management algorithms for power saving
- Compatible with the main standard control devices on the market
- Ample integration/monitoring possibilities
The pR300T is ideal for managing carbon dioxide-based booster systems. The new pRack pR300T platform offers the market of transcritical CO2 systems a product that with continuous enhancements, allowing users to easily manage inherently complex systems:
- Complete management of transcritical CO2 systems on one single controller
- Use of a simple and intuitive user interface (customisable if needed)
- Quick access to monitoring systems
- Quick access to programming (USB host and device)
- Safety and backup procedures
- High flexibility (multi-board, I/O customisability)
Benefits:
- Oil management (cooling-injection-separation)
- Heat recovery (double heat exchanger and gas cooler bypass)
- Control of the HPV valve (optimised algorithm for pressure calculation)
- Flash valve adjustment (pressure of the receiver-safety devices connected to the HPV)
- Restore procedures (fault synchronisation with case controller) Integration with Chillbooster (evaporative cooling system for air-cooled condensers)
- Activation of parallel compression (auxiliary compressors for receiver pressure control)
Main functions and features:
One single controller for the complete management of a small-medium size compressor racks, including direct management of the HPV and flash gas valves: thanks to the driver for stepper expansion valves integrated into the controller, no external valve drivers need to be installed. Ultracap technology, embedded in the hardware, maximises system safety.
Features:
- All in one: one board to manage compressors (MT<), gas cooler fans, HPV&RPRV, parallel compressor
- Built-in safe EEV control and power-safe closure: direct management of both HPV and flash gas
- Extensive flexibility: single or multi-board, configurable universal I/Os
- Dynamic algorithms: optimal pressure, floating suction/condensing, MP optimisation
Technical specifications:
- Three suction line management
- Parallel compressor able to work as an MT compressor
- Gas cooler and high pressure system control
- Modulating ejector control
- Optimisation of medium pressure control
- Double heat recovery control
- Oil distribution and oil pressure control
- Double system synchronization
- Safe restore via supervisory system
Applications: Transcritical CO2 compressor racks
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By CAREL INDUSTRIES S.p.A. , published Jun 01, 2017
By CAREL INDUSTRIES S.p.A. , published Jun 01, 2017
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