Rittal Corp. has expanded its line of chiller systems. The systems are designed to cool electrical enclosures, machine tools and even central cooling systems. Chiller systems are integrated into PS 4000 cabinets and can be bayed with PS series enclosures. The cooling capacity is 13,650 BTU to 170,000 BTU, and the cooling water is kept at a constant temperature, which is regulated via thermostat. A pump circulates the water to air/water heat exchangers or other components, and then returns the water to the chiller to be re-cooled.