Available on several models equipped with one or more screw compressors, dimensioned to be used with refrigerant type R134a or with the new low GWP HFO-1234ze. The units of the GSA series are assembled on a strong self-supporting metal screwed and welded structure, painted with epoxy powder with anti-rust coating for outdoor installation. All units are supplied completely wired and ready to be connected to the user’s plant. Prior to delivery every machine is submitted to a performance test, with intervention tests of all the safety systems and components installed. Each unit is available with low-speed fans and compressor sound insulation kit for the LN (Low Noise) and LLN (Super Low Noise) versions, for installation in areas where noise emission must be kept to a minimum.