Regulation with the ES 4000 controller allows the user to considerably reduce electrical energy consumption in the no load phase, through the "intelligent shut-down" feature, by automatically calculating, cycle by cycle, the minimum no load functioning time, based on air consumption and the maximum number of start ups per hour programmed.

Once maximum pressure has been reached, in the absence of air, even due to lack of need, the compressor switches to no load. The energy saving is obtained by stopping the compressor, following the shortest possible no load. This ensures:

• that the maximum number of start-ups per hour programmed is not exceeded;
• immediate re-starting in order to satisfy a subsequent requirement of air.