Lochinvar & A.O. Smith 100278092 Switch 318518-761 While the Fasco D783 uses

While the Fasco D783 uses sleeve bearings for quieter operation in air-over applications

ensuring exact set-point alignment without manual calibration

Versatile Application: 20-inch length provides ample material for custom routing and secure fitment

including furnaces under the Heil

including 15A at 277VAC and up to 3HP at 600VAC

Lochinvar & A.O. Smith 100278092 Switch 318518-761 While the Fasco D783 usesThe 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