York S1-024-35286-000 SPNO Pressure Switch Close On Fall -0.9" WC

The York S1-024-35286-000 Pressure Switch used in the HVAC systems to measure and regulate air pressure. This is an SPNO switch that is to close on fall at -0.9” WC. Therefore, when the air pressure reduces to below -0.9 inches of water column, this switch turns on to make a signal to other parts of an HVAC system. This functionality is essential in controlling the flow of air, the running of equipment such as fans and blowers, avoiding problems such as frozen coils or inadequate air flow, and therefore providing a better environment for occupants of the building.