It mounts directly over the actuator hub and setscrews

Ensure your system remains within safe operating parameters by verifying this component during routine maintenance or after a leak repair on older R-22 equipment

This is an automatic reset control

Broad Application: Verified for use in C9MPD

York S1-55000-328 Detector Head Els PW 17895 It mounts directly over theThe York S1 55000 328 is a high sensitivity photoelectric duct detector head engineered for rapid smoke detection within environmental air ducts. This OEM York replacement part serves as the direct successor to the legacy S1 55000 225 ionization head, facilitating a critical transition from ionization to photoelectric smoke sensing technology. By utilizing an infrared LED and photo diode arrangement, the S1 55000 328 excels at detecting slow burning,