The condenser fan, relocated to the roof of the unit, provides optimum thermal performance and an incorporated condenser protection grill minimises the risk of damage during transit and installation.
While the temperature of the chilled water supplied for enclosure cooling is important, it is not as critical as that used for process cooling.
Spindle cooling, for example, demands the cooling medium is supplied within a tolerance of ± 0.5K to guarantee the necessary accuracy, otherwise the thermal expansion of the components will cause inaccuracies in the machined workpiece.
Chillers are generally governed by a two-point control system and it is not possible to control within the small hysteresis required for machine element cooling, as the frequent switching would compromise component life.
The new Top Therm incorporates a variable speed compressor powered by a brushless dc motor, the speed of which is controlled by an inverter to deliver the cooling medium at a temperature with the required accuracy.
The capacity of the new range is 2-19.5kW, with chilled water temperature control within +/-0.2K.