and the gray port (P2) is for negative/vacuum pressure

Can I clean the 28G36 sensor instead of replacing it

The serrated clamping mechanism is designed to bite into the shaft surface

Check for continuity between the terminal and the rod tip

System Safety: Properly interfaces boiler safety controls to verify damper position before burner ignition

Johnson Controls A19ABC-24 Temperature Control Els PW 17895 and the gray port (P2)The Johnson Controls A19ABC 24 Temperature Control is a field proven mechanical temperature control designed for heavy duty commercial and industrial applications. This single stage unit features a SPDT switching configuration, allowing it to govern heating, cooling, or ventilation equipment with industrial precision. Engineered with a wide setpoint range of 30? F to 100? F, it handles refrigeration and ambient space heating with ease. The adjustable