Description
The York S1-02435-262000 On Fall SPNO Air Pressure Switch is a safety part utilized in many of the HVAC systems. This is used to detect pressure in the system especially pressures that are below some set limit, the parts being capable of sounding an alarm or stopping operation of certain parts of equipment. This switch is an SPNO type, that is it is open normally and only closes when the air pressure is below 1.20” WC. It is this type of pressure switch that is necessary for safeguarding equipment and conditions for safe work in various kinds of Air Handling Units, Chillers, Cooling towers etc.
