This differential air pressure switch monitors the pressure drop across the heat exchanger

high-contrast face ensures high visibility in mechanical rooms

technicians recommend replacing the liquid line filter drier whenever the refrigerant circuit is opened to prevent moisture and contaminants from damaging the new HVAC compressor

It does not provide terminals for auxiliary or emergency heat (W2/EM)

The 3-pole configuration provides comprehensive phase control

Siemens Building Technology 7MF15654CD005EA1 Sensor L99H008 This differential air pressure switchThe Siemens SITRANS P200 7MF1565 4CD00 5EA1 is a high performance liquid pressure sensor designed for demanding HVACR and industrial hydraulic applications. This 0 300 PSIG pressure transmitter features a piezoresistive ceramic measuring cell with a thin film strain gauge, ensuring exceptional long term stability and high overload resistance. Engineered for gauge pressure measurement, it converts mechanical pressure into a precise 4 20mA output