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The Sensus 143-16-021-05 Green Spring is a critical calibration component engineered for Sensus Model 143-80
If it shows high resistance or is open at room temperature
The seat in the relief valve module for this size range can typically be accessed using standard hand tools once the relief valve cover is removed and the module is extracted
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