CSVW series

The CSVW series is a unique new development in the field of compact screw compressors, specially developed for speed control and optimised for use in water cooled liquid chillers as well as in air cooled liquid chillers with low condensing temperature. The efficient, proven and reliable engineering of the CSW series and many years of experience with speed-controlled compressors form a sound foundation. The CSVW compressor series significantly simplifies the installation and safe use of speed-controlled compressors in air conditioning and process cooling, thanks to integrated frequency inverters, sensors for compressor protection and monitoring, and solenoid valves (Vi control and liquid injection) in a single prewired package.

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The special attributes

Energy efficient
- Highly efficient rotor profile
- Oil management system of the third generation
- Automatic Vi control
- Seamless capacity control thanks to frequency inverters
- Ideal for systems that frequently operate under part-load – optimised to achieve even greater seasonal energy efficiency (ESEER/IPLV and SCOP values)
Compact, low weight
- Shortest length and lowest weight in its performance class
- Integrated frequency inverter
- Low weight–output ratio
Monitored operation
- Enhanced operation monitoring
- Warning and feedback close to the application limits before shut-off
- User settings for adapting/optimising the system
Simple installation
- Frequency inverter, motor, sensors and controller already fully wired
- Minimal external cabling:
- Three-phase power connection cable
- Single-phase auxiliary voltage
- Modbus communication

Engineering
- Proven design features taken from CSH/CSW development
- Highly efficient rotor profiles
- Durable pressure-released bearing – specially designed for high speeds and a wide range of speeds
- Vi slider for highly efficient operation in a wide range of applications
- High-efficiency oil separator
- Economiser (ECO) port
- Connection for liquid injection (LI)
Motor
- Highly efficient, specially developed permanent magnet – motor designed for high speeds with frequency inverter
- Very large speed range – up to over 1:6
- Suction gas-cooled
- Motor temperature monitored by frequency inverter control
Frequency inverter (FI)
- Specially developed for the CSVW series
- Small construction size
- Cooling plate, cooled by evaporating refrigerant, controlled by three valves
- Just one line connection necessary for liquid refrigerant
- All components are designed for a full service life – no special maintenance required
- Built-in monitoring with warning and alarm functions
- Prewired monitoring and control components
- Wide nominal voltage range: nominally 380 to 480 V at 50 and 60 Hz
- Modbus communication connection to the system controller
- Soft start feature – voltage increases evenly up to operating current with no current peaks