Abstract: An arrangement on a printing machine, includes at least one low-temperature (NT), medium-temperature (MT) and high-temperature (HT) temperature control point, which are arranged in a low-temperature (NT), a medium-temperature (MT), and at least one high-temperature (HT) zone of a printing machine and are designed such that the NT zone can be controlled to a low temperature by the NT temperature control point, the MT zone to a medium temperature by the MT temperature control point, and the HT zone to a high temperature by the HT temperature control point, the low temperature being lower than the medium temperature, and the medium temperature being lower than the high temperature. The arrangement includes a low-temperature (NT) temperature control device and a high-temperature (HT) temperature control device. The temperature at the MT temperature control point can be controlled by both the NT and the HT temperature control device.

Abstract: A cooling device for printing machines, includes a refrigerating circuit (10) and a cooling water circuit (12), in which the refrigerating circuit (10)-is provided with a compressor (14) having a compressor drive and a regulator (34). The compressor is configured such that the compressor output of the compressor (14) can be controlled via the regulator independently of the rotational speed of the compressor drive.

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.