Hi all, I'm Stephane Bergeron with a 71 push button in Paris, and I'm upgrading my A/C system with a new pressure switch on the dryer , coming from a GT5S. It says L/P 2bars, M/P 15 bars, H/P 27 bars .(presuming this is low, medium and high press) Does anyone know how this works and how it should be connected ? Thanks. Steph