... china 2. we have installation team Multiple screw compressor condensing unit1.bitzer series screw compressor from 150HP to 540HP , 2 TO 6 ... numbers of compressor to be parallel unit2. Refrigerant : R404A, R22 ... need, save 20% power compared with single unit .3)Compact structure, save machines space.4)Full automation, equip with siemens ...