NAE series multi-circuit rack chillers are available in many configurations. The rack systems offer advantages over the modulars in that modules are packaged with common water headers, inlet/outlet water valves, main power connections allowing single point customer connection.  The rack system displayed in the photo shows   (5)-10ton Copeland Scroll chilling circuits assembled on one 82"W x 10'L frame.  Each circuit is staged through controls installed on the unit or a remote panel can be supplied.  This concept allows redundancy and tremendous energy savings. Each circuit includes tandem Copeland Scroll compressors providing additional backup.  Each circuit can be serviced without interrupting the operation.which is a another very important advantage this sytem offers.  The rack systems are used in critical operations.