With two-stage compression and EVI technology, system efficiency is around 6% higher than a single-level compression. With efficient economizer, efficient flooded evaporator, and two-stage throttling, energy efficiency increases fully.

The application of two-stage compression increases compression ratio and widens operating range. The unit uses high-performance and industry-leading gear, which reaches military level and Grade-5 precision of national standard. IGV, blade-free diffuser and efficient interlocking vapour injection efficiently prevent surge. Level-F efficient fluorine-resistant closed motor and multi-channel liquid spray cooling enhance security and reliability. The built-in oil pump reduces possibility of leakage and enhances reliability of the unit.

The control system of 10.4'' color touch screen can clearly display necessary information on unit operation on the water side/refrigerant side/lubricant side/electric side. The unit can record the latest 10 alarms and provide self-diagnosis information, thus helping customers analyze fault causes and rapidly rectify faults. The control system is configured with multi-level password protection to prevent operation or parameter change without authorization. The unit can be set to be powered on/off at the specified time, thus enabling unattended operation in an equipment room.