OptiChill FreeCool Chiller [750 - 1300KW]
Flexible Free Cooling Chiller
OptiChill FreeCool is a large capacity, low energy R134a air-cooled screw chiller that meets diverse cooling loads with a flexible, low sound cooling solution.
Highly Energy Efficient
The OptiChill FreeCool offers more than 95% free-cooling over a year (cumulative hours, London, UK) and can save more than 50% of the energy consumed by a conventional chiller thus greatly reducing operational costs.
For up to 30% of the year, the OptiChill FreeCool can operate purely in free-cooling mode, leading to Free-cooling EER's* of up to 75. During any mechanical cooling, excellent part load efficiencies ensure an ESEER (European Seasonal Energy Efficiency Ratio) of up to 3.44.
*Free-cooling EER at 15°C return water; 20% ethylene glycol; 3°C ambient temperature
Key Technical Data
- 750 - 1300kW nominal cooling capacities
- Designed and optimised for R134a
- 4 case sizes; two free-cooling variants, three fan variants* and two sound level variants in each range, presenting a choice of over 200 model permutations
- Low sound ranges: Quiet (R) and Extra Quiet (X)
- Dual independent refrigeration circuits
- Advanced ACIS controls technology
- Latest fan technology for reduced sound and power input
- Intelligent head pressure control
- Two screw compressors offering 8 stages for optimum efficiency, performance and reliability
- High efficiency shell and tube evaporator
- Large surface area condenser coils
* Standard AC fan, optional EC (Electronically Commutated) fan or high air flow EC fan
- EER1 up to 3.06 ESEER2 up to 3.44
- Free-cooling virtually all year round
- Economisers, each with dedicated EEV, to enhance compressor performance at full and part load operation (option)
- Interactive head pressure setpoint management to achieve optimum EER
- EC fan for ultimate system efficiency (option)
- Efficient shell and tube evaporator with freeze protection offers high evaporating temperatures
- Large surface area condenser coil with enhanced tube and fin for improved heat exchange and low noise
- Inverter-controlled pump with flow monitoring and water filter for optimum constant water flow control (option)
- Two sizes of free-cooling coil (2 and 3 rows) for increased annual efficiencies
- Electronic expansion valves increase ESEER by 30%
- Closed transition avoids high transient changeover current peaks (option)
- Compressor power factor correction to 0.95 (option)
- Automatic rescheduling of chilled water setpoint
- Chiller Sequence Manager integrates up to 8 chillers into a single, efficient operating system (option)
- Energy Manager for local and remote energy analysis and monitoring (option)
1 EER (Energy Efficiency Ratio) @ 15/10°C, 35°C
2 ESEER (European Seasonal Energy Efficiency Ratio)
