D Series Modular Air-Cooled Scroll Chillers are well-developed products designed with multiple advanced technologies. Their mainly features are: low noise level, compact structure, easy and safe operation, convenient maintenance and service etc. Widely used at newly built or retrofitted industrial and civil buildings in various sizes, such as, hotels, apartments, restaurants, office buildings, shopping malls, theaters, gyms, workshops, hospitals and other places where there are high requirements on noise level and air but the cooling tower is going to be installed troublesomely. 4 D series modular air-cooled scroll chillers are constructed of one or up to 16 single units which may varies in structure and in capacity of either 65NaD, 80NaD(two independent refrigeration cycle) or 130NaD,160NaD (four independent refrigeration cycle) so as to build up a array of products with the cooling capacity ranging from 60 to 1160kW.