2nd separate drive
In the towers and evaporative condensers with centrifugal fan, is possible on demand, the installation of a second electric motor reduced power and revolutions half the main acting on the single shaft fans and independently (never operate two motors simultaneously, only operates one of the two motors according to the need for cooling).A second controls reduce capacity to 66%, 50% or 33%, using different regimens of rotation motors, minimizing the consumption power and sound. On the other hand increases the operational safety, to exclude the contemporary failure of two motors.
