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The System Sensor D4120 is an industrial-grade 4-wire photoelectric duct smoke detector designed for high-performance smoke detection in HVAC air handling systems
Common Questions & Technical Support: Is this the correct replacement for a 56183 Modine part
designed to act as a control circuit switch rather than a power-switching device
The integrated 1/8" NPT pilot tapping allows for secondary connections
Lochinvar & A.O. Smith 100109617 Tubing 340155-7026 The System Sensor D4120 isThe Lochinvar and A. O. Smith 100109617 is a precision engineered 60 inch pilot tubing assembly designed for high performance commercial and residential water heaters. This 1 4 inch OD aluminum tubing provides the necessary durability and flexibility for routing through compact burner compartments without risking structural kinks or flow restrictions. Rated for high temperature environments, this OEM replacement pilot line ensures a consistent fuel
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