Electrical panel for compressor racks

The compressor rack is the most important and complex electromechanical device in the refrigeration system: this delivers cooling for the foodstuffs to all the refrigeration units and related processing rooms.

The CAREL retail sistema has been designed to be meet the needs of manufacturers, providing OEMs and installers a complete line that matches the results of their design efforts, maximising results. From limited numbers of simple hermetic compressors or large racks, to inverter driven or capacity-controlled semihermetic and hermetic compressors. In terms of energy saving, the compressor rack has a wide range of operation, as the installed power is very significant: all our solutions have been designed with the focus on this aspect.

The use of E2V proportional electronic expansion valves, along with the power of the electronic controllers, allow energy balance to be maximised. CAREL offers two platforms for managing compressor racks: μRack and pRack. The μRack series includes a series of compact parametric controllers, at a low cost and particularly easy to use and install on small systems with the following features:

• high efficiency display for viewing monitored variables;
• mounting on DIN rail or panel and in kits complete with accessories;
• clear and highly visible icons for operating conditions and any anomalies;
• a PWM output for modulating condenser fan operation using a speed controller.
• operation with floating condensing pressure for increasing compressor efficiency and performance.
• three levels of access for viewing and programming the parameters: (user, installer, manufacturer), with the possibility of reassigning the parameters among various levels. pRack is the ideal solution to meet the many needs of the market for control and management of more complex and advanced centralised compressor racks (i.e. CO2 refrigerant):
• high number of inputs and outputs for control requirements;
• innovative management algorithms for energy savings;
• unique control software in six languages, compatible with various hardware sizes and with a wide range of integration/ supervision possibilities;
• possibility of separating the compressor controller from the fan controller with a unique user interface and local network connection between controllers.
• drastic reduction in electrical connection costs for remote fans.
• control of modulating capacity through dedicated outputs for compressor inverter and/or inverter/cut-off controls for condenser fans.
• operation with floating condensing pressure for increasing compressor efficiency and performance.