the 0121627 is the official Watts lead-free replacement for the 5300A-1/2 and the older 0391600 models

The calls from the thermostats remain active

this model is an "open enclosure" type (No Enclosure) intended for mounting inside an existing control panel or equipment housing

Technical performance should always be verified against the specific unit wiring diagram

Johnson Controls P170AB-2 Pressure Control Els PW 17895 the 0121627 is the officialThe Johnson Controls P170AB 2 is a heavy duty single pole single throw (SPST) low pressure control engineered for critical cycling and high pressure cutout applications. This industrial pressure switch operates with an open low action, featuring a versatile pressure range from 20" Hg to 100 psi. Designed for reliability in commercial refrigeration and HVAC systems, it handles non corrosive refrigerants including R 22, R 404A, and R 134a. The unit