OptiChill™ FreeCool

Refrigeration System

• High capacity twin screw compressors offer reliability and flexibility, with staged capacity control
• Low GWP R513A refrigerant (GWP 573)
• 8 stages of cooling across two compressors for more precise capacity match
• Dual independent refrigeration circuits for resilience
• Efficient shell and tube evaporator with freeze protection offers high evaporating temperatures
• Economizers, each with dedicated EEV, to enhance compressor performance at full and part load operation

Chilled Water System

• Up to 95% free-cooling via enhanced economizer technology that increases free cooling envelope, even in high ambient regions
• Glycol containment system protects chiller while ensuring 100% chilled water delivery to the data center, increasing heat exchange efficiency
• Increased operational evaporating temperature range allowing supply water temperatures to be increased, thus raising the free cooling threshold and giving enhanced compressor efficiency and reduced power input
• Large surface area condenser coil with enhanced tube and fin for improved heat exchange and low noise
• On-board variable speed pump, ensuring supply is perfectly matched to load while maintaining water-side TD and saving on external plant requirements

Controls

• On-board active harmonic filtration, ensuring a clean power supply to the data center, while saving on external plant requirements
• Automatic rescheduling of chilled water
• Enhanced controls including fast start, load limiting and intelligent management of compressors, refrigerant and pumps
• Modem link for remote monitoring

Construction

• Latest fan technology reduces sound and power input
• Robust construction with acoustic insulation features, that can perform in a wide range of climates / settings
• Corrosion-resistant condenser coils for aggressive atmospheres
• Optional Coil guards to help prevent fin damage.