Major System Components - Midea LSBLG MCF Series Technical & Service Manual

Flooded type water cooled screw chiller (MIC)
6.

Major system components

6.1 Advanced twin screw compressor
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Midea screw chiller is equipped with the 3rd generation industrial compressor, which has the latest
advanced 5-6 Asymmetry Dentiform Semi-hermetic Screw Rotors. The rotors are processed by
high-precision CNC and each part is well-proportioned and no-gap matching, which minimizes
friction and clearance lost, guaranteeing quiet running and service life.
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LSBLG/MCF Series units come with a high efficiency oil separator to maximize oil extraction.
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Compressors have infinitely variable control down to 25% of their total capacity. This control is made
by capacity slides controlled by microprocessors.
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Standard starter is star-delta type. Infinite capacity control type is available (as an option).
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With 5-6 asymmetry dentiform, the screw rotor patent is based on improving the shape of German
rotor GHH. It is proven to have good balance, low vibration, and low noise after balance testing by
special machines. Compared with the normal screw rotor with 4-6 dentiform, the heat efficiency of
the rotor with male and female rotor and 5-6 dentiform has increased by 10%-12% and uses 25%
energy. The rotor also gained British and American patent.

The bearing of compressor is from SKF, Sweden, the long lifespan of which ensures screw-type
main unit can run continuously for more than 50,000 hours.
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MCAC-CTSM-2018-1