CWMC-OTS Electric Boxes (Chilled Water Master Control "Off the Shelf") - This electric box can be used with 2 to 6 stage MCW chillers with DDC controls as either a field retrofit or it can be ordered with a new chiller. The box contains the CWMC circuit board, SW & CW pump contactors (and overloads if 3 ph), a term. block for pump & power connections, and the CWMC display in the lid. Circuit breakers are not included.