Danfoss Variable Speed Drive (VSD) configured with LON board controlling a 30 hp evaporative cooled condenser. The VSD is controlled by a Danfoss Akcess 55 controller using the drives internally mounted LON board.

Variable Speed Drive installation

ABB Variable Speed Drives (VSDs) utilizing bypass panels controlling two air-cooled refrigeration condensers. Com-Trol MCS4000 rack controllers are used to control the VSDs based on ambient temperature vs. pressure PID loop.

Variable Speed Drive installation

ABB installation on 25 hp air handler controlled by Com-Trol MCS4000.