How to Adjust Pressure Switch for Compressor On/Off Control: Step-by-Step Guide & Tips

How to adjust this pressure switch to turn the compressor off and on. Because the compressor works all the time.

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Ps. If you wrote about this model, maybe someone would describe you in detail.

Model presostatu to boot xa077020.67.

You turn the screw at the top where you have it + and - .
On the plus side, you increase the switch-off pressure, on the minus side, you reduce the switch-off pressure.
The hysteresis is constant, about 1.5 bar (as I remember correctly), i.e. when you set the switch-off to 8bar it will switch on at about 6.5bar.
See at what pressure the manometer stops and does not raise further because maybe you are using too much air and the compressor has no capacity?
Adjust on the closed outlet of the tank.

What is the minimum pressure to start the compressor?

It depends on the hysteresis of the switch, the one you have has a constant hysteresis and the lower value depends on the upper.
Pressure switches with adjustable hysteresis are, for example, Telemeqanique XPA series or Condory with a thermic, but also below 1 bar it is hard to buy something, the standard is 1.5 bar.