How are the pressure switches on a Booster System adjusted?
Pressure Switch Adjustment Basics Armstrongs booster systems come with a number of pressure switches. All of these switches have a set point and a re-set value. The re-set value is always below the set point. The set point and re-set are dependent on the purpose of the particular switch. For booster systems with pressure switch sequencing, each of the pressure switches for sequencing another pump has to be adjusted as follows: • There are two settings to make on a pressure switch. The set point (cut out) is set by turning the lower screw on the switch. The differential (cut in) is set by turning the upper screw on the switch. The differential setting is inter-linked with the set point screw by a cam mechanism. • For pressure sequencing systems, the set point (Cut Out) should be set at the desired system pressure. This is the point where the lag pump would cut off. In a system with more than one pressure switch for pump sequencing, all would have the same set point (Cut Out) value. • Th
