Lochinvar & A.O. Smith 100278092 Switch 321894-709 Ensure your controller is scaled

Ensure your controller is scaled correctly to interpret the 4-20mA signal across this specific amperage span for accurate data logging

Compact frame design fits standard Aaon electrical sub-panels and DIN rail mounts

The tapped retainer cap includes a 1/4" closure plug for easy blow-down cleaning without removing the unit from the line

and protecting the compressor from liquid slugging or overheating

Always ensure the motor shaft is clean and free of burrs before installation

Lochinvar & A.O. Smith 100278092 Switch 321894-709 Ensure your controller is scaledThe Lochinvar & A. O. Smith 100278092 Switch is a critical safety and operational component designed for high performance commercial boilers and water heaters. As a factory authorized OEM flow switch, this assembly ensures the burner circuit only energizes when adequate water velocity is detected, protecting the heat exchanger from dry fire conditions and thermal stress. The unit comes integrated with a durable brass tee specifically sized for CC120