Danfoss NC. 0 bar – NO. 0.7 bar Low Pressure Switch, Danfoss NC. 0.7 bar – NO. 1.7 Bar – Low Pressure Switch, Danfoss NC. 16 bar – NO. 13 Bar – Fan Control Switch, Danfoss NO. 25 Bar – NC. 20 bar – High Pressure Switch, Danfoss NO. 28 Bar – NC. 21 Bar – High Pressure Switch