XRAF – XRAC
The right choice to increase cooling of Data Centers
New Unflair Coolers (XRAC, XRAF series) with screw compressors provide an extra boost in efficiency, precision, adaptability and configurability to face the future cooling challenges of Data Centers
Main configurable options and accessories
Air-cooled chillers with axial fans for outdoor installations
• The unit is equipped with a free-cooling system consisting of air-side free-cooling coils close to the condensing coils and a dedicated free-cooling pump.
• Separate power supply for main board and auxiliary section
• Dual power supply with automatic changeover (ATS)
• Silent and Ultra Silent noise version to minimise unit noise levels
• Noise reducing diffusers
• Refrigerant options: R134a (as standard), R513A, R1234ze, R1234yf as option
• Compressor technologies: stepless, hybrid (1 stepless + 1 VSD), full inverter
• Adiabatic spray system to increase efficiency
• Intelligent free cooling capability to improve free cooling capabilities
• User-side pump group integrated into the chiller frame in the following configurations: 1 fixed speed, 1+1 fixed speed (one for redundancy), 1 inverter
driven by external inverter, 1+1 inverter driven by an external inverter
• Suction shut-off valves to isolate each compressor in case of maintenance and manometers on each circuit
• Subcooling with additional cooling circuit to increase subcooling on the condensed liquid refrigerant without changing the unit model economizer
and frame
• Water filter integrated in evaporator inlet
• Air-side coil guards as metallic filters and coil manifold guards
• E-coating treatment for air-side condensing and free-cooling coils to protect in aggressive media installation
• Additional module shipped separately and connected in the field for models 5622 and 6422 to increase efficiency and cooling capacity
• Power phase capacitors (for stepless) to improve unit cosphi
• Electrical service socket and service light to simplify maintenance operations
• Partial condensation heat recovery
• Suitable for truck and container transportation
• Control accessories: RS485 serial card (Modbus RTU) as additional BMS, TCP/IP module (SNMP, Modbus TCP/IP), pCONet card (BCAnet MS/TP, e.g. •
Spring
anti-vibration supports
• Flange connection adapters and Victaulic/Weld adapter kit
• Lift tube kit
• Easily serviceable external water filter
• Adapter for Grouping Logic up to 10 units
XRAF/XRAC Series Main Features
1- Electrical connections
2- Inverter for frequency regulation of compressor/compressors
3- Electrical panel and user interface
4- Ventilation system for electrical panel
5- Free cooling collector pipes
6- Axial EC fans
7- Evaporator
• Dry shell and tube evaporator to maximize heat exchange coefficient
8- Free cooling coils
• Cu/AI typology
• Placed next to the condensing coils to provide free cooling without affecting the unit dimensions
• Dimensioned to maximize the free cooling surface and thus increase annual performance
9- Air side condensing coils
• Cu/AI typology (models 1812A to 4812A)
• MCHE typology (models 5622A and 6422A)
