Abstract: In an assembly for controlling the temperature of a fountain fluid and/or selected rollers of a printing machine, which includes a fountain fluid circulating system, a cooling fluid circulating system, a refrigerant circulating system, and a means for selectively operating one or, simultaneously, more than one of the circulating systems, a common heat exchanging means is provided. The common heat exchanging means comprising a plurality of flow passages disposed in heat exchanging adjacent relationship with each other, and a distributing means for connecting each of the circulating systems to a selected series of flow passages of the common heat exchanging means. Adjacent flow passages can be connected to different circulating systems for heat exchange therebetween. The temperature-controlling assembly therefore can be operated in different heat exchanging functions.

Abstract: An assembly for controlling the temperature of a fountain fluid and/or selected drums of a printing machine comprises a fountain fluid circulating system for supplying a fountain fluid application means with a fountain fluid, a cooling fluid circulating system for supplying a drum cooling means with a cooling fluid, a first internal cold source which is in heat-exchanging relationship with the fountain fluid circulating system, a second external cold source which is in heat-exchanging relationship with the cooling fluid circulating system, and a means for selectively operating one of the circulating systems, for the fountain fluid or the cooling fluid, or both of these circulating systems. Further the condenser means of the first cold source is in heat-exchanging relationship with the refrigerant circulating system of the second cold source. The temperature controlling assembly thereby allows the requirements for cooling energy to be precisely matched to the currently effective operational mode.