Standard practice requires mounting with the coil in the vertical-up position

Sequence Control: The thermal delay prevents simultaneous loading of two separate 240V circuits

Contaminant control: Solid molded core provides high-capacity filtration of solid debris and acid

Technical Specifications & Key Benefits Compatible with System Sensor legacy detectors: DH100

Mcdonnell & Miller 354141 Long Barrel Probe R-410A Standard practice requires mounting withThe McDonnell & Miller 354141, also identified as the PA 800 U Long Barrel Probe, is a critical sensing component engineered for high performance water level detection in commercial and industrial HVACR applications. This extended barrel probe is designed specifically for use with the PS 801 U 120 and PS 802 U 24 low water cut off (LWCO) series. As a veteran technician knows, maintaining precise conductivity levels is essential for boiler safety; this