Lochinvar & A.O. Smith 100278092 Switch R-407A if the bypass is set

if the bypass is set too low or the capillary is kinked

Zero Differential Operation: The direct lift design allows the valve to function reliably even at 0 PSI

delivering precise thermal output for auxiliary or emergency heating stages

utilizing a standard 3/4" NPT connection

Professionals frequently utilize this Carrier HVAC control board to resolve communication issues

Lochinvar & A.O. Smith 100278092 Switch R-407A if the bypass is setThe 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