Lochinvar & A.O. Smith 100208176 Limit Switch 30067439-890 The Sensus 143-16-021-05 Green Spring

The Sensus 143-16-021-05 Green Spring is a critical calibration component engineered for Sensus Model 143-80

Robust 24V control logic manages blower delay and ignition safety protocols efficiently

It operates within a standard 24VAC control circuit and is rated for 208-230V applications

Key Benefits Manual Reset Feature: Enhances system safety by requiring a technician to physically reset the proving switch after an air pressure trip

System Protection: Acts as a primary refrigerant safety switch to prevent compressor overheating and liquid slugging during low-side pressure drops

Lochinvar & A.O. Smith 100208176 Limit Switch 30067439-890 The Sensus 143-16-021-05 Green SpringThe Lochinvar & A. O. Smith 100208176 Limit Switch is a critical safety component engineered to monitor and regulate water temperatures in high efficiency domestic and commercial heating systems. Calibrated specifically as a 240F High Limit Switch, this device functions as a manual or automatic thermal cutout, interrupting the electrical circuit to the burner or heating elements should the system exceed safe operating parameters. Rated for 240 degrees