Energy saving, increasing cooling capacity as needed, can save more than 20% energy compared to matching a single independent unit; Safe operation, constantly monitoring various parameters of the unit operation, with fault warning function to ensure safe and reliable operation; Compact structure, centralized installation of multiple machine heads, saving space in the computer room, and short construction period; Adopting Siemens programmable PLC to control fully automated operation; Automatic balancing of operating rate greatly extends the overall service life of the unit; The independently set oil level controller effectively prevents oil deterioration and pollution between compressors; 2-6 piston compressors in parallel, up to a maximum of 300HP, suitable for high, medium, and low temperature systems.