Aircooled chiller Uniflair 500 kW
- Brand: Uniflair
- Power: 500 kW
- Year: 2011
| Cooliing capacity | 500 kW |
| Year of manufacture | 2011 |
| Options | FREE COOLING |
| Refrigerant circuit | 2 pcs. |
| Compressors | 2 pcs. FU SHENG (screw) |
| Hydraulic module | 2 pcs. pumps Calpeda |
| Type of refrigerant | R134A |
| Number of fans | 8 pcs. |
| Working hours | 2204/2256 h. |
| Dimensions | 2,6 х 6,5 х 2,2 m. |
| Weight | 5 900 kg. |
| Condition | excellent |
Exclusive Uniflair free-cooling system completely managed by microprocessor control.
• Self-supporting frame in galvanized steel with panels finished in epoxy powders (color RAL9022)*.
• Two semi-hermetic double screw compressors with internal thermal protection, discharge shut-off valve, oil heaters, and anti-vibration supports.
• Two refrigerant circuits conforming to EC norms (PED 97/23/EC) in copper tubes including: filter dryer, flow indicator, electronic expansion valve managed by the control system, electrovalve on the liquid line, pressure switches, transducers, and manometers of high and low pressure.
• Possibility of operation with external temperatures down to -25 °C.
• High efficiency shell and tube single passage evaporator. The heat exchanger is insulated with UV resistant closed cell expanded neoprene.
• Air side exchange coils with aluminum fins and internally grooved copper tubes.
• Water flow differential pressure switch.
• Acousti-Composite fans: sickle-blade axial fans, statically and dynamically balanced, made from composite materials for high efficiency and low acoustic impact with safety protection grilles.
• Modulating condensation control with fan speed regulation.
• Electrical panel conforming to EC norms (Directive 2006/95/EC and EMC 2004/108/EC, IP54) with general cut-off switch, power supply electic bars distribution, acquisition of absorbed current, minimum and maximum internal temperature control, magneto-thermal cut-off switch on the fans and auxiliaries, fuses for the compressors.
• Sequence phase, minimum and maximum power supply monitoring.
• Free-cooling pump regulated by microprocessor control.
• Microprocessor control system UPC1m including:
– Local user terminal with external accessibility
– Outlet chilled water temperature regulation by means of an exclusive PID algorithm
– Electronic expansion valve managed by the control system
– Advanced control of cooling capacity by automatic set-point sensitivity regulation
– Refrigerant charge monitoring
– Monitoring of the absorbed current and checking of possible malfunctions
– Advanced antifreeze protection on the evaporator
– Integrated LAN card for local network connection of a group of chillers
– Integrated clock card
– Rotation of pump group setting functioning and start of the pump in standby in the event of pump breakdown
• Microprocessor control system, in addition, allows:
– Management of double set point from remote control
– Limiting of absorbed current on preset value or external signal
– Rapid quick start procedure to reach total cooling capacity within three minutes
– Free contact for general alarm and two for addressable alarms
– Remote ON-OFF switch
– Ability to interface with Modbus protocol directly on RS485 serial card
– Ability to interface with main external communication protocols: BACnet, LonWorks, Trend, Metasys, TCP/IP, and SNMP
