Lennox 11U66 Pressure Switch 0.55 WC

The Lennox 11U66 is a pressure switch a safety control component for HVAC systems furnaces and air handlers. It checks the pressure of air in the system and operates as an open and closed system. After the pressure reaches a particular point, the switch completes electrical circuits systems furnaces and air handlers. It monitors air pressure within the system and functions like an on/off switch. When air pressure reaches a preset level the switch triggers electrical circuits. These opening or closing of the circuit helps in proper system operation and prevent the system from exposing to abnormal pressure. It also enables the frequency of safe and efficient system operations to be kept up.