the Trane BAY24X042 provides the necessary isolation and switching to stabilize the fan circuit

this replacement burner tube features integral carryover flaps to ensure reliable flame propagation and cross-lighting across the burner rack

also identified under part numbers GKT2400 and GKT2400K

4-20mA control

and Payne commercial units

Fireye 60-1290 Union 321894-706 the Trane BAY24X042 provides theThe Fireye 60 1290 is a specialized 1 2" NPT union designed for industrial combustion environments where precise UV flame detection is critical. Engineered with a precision ground quartz magnifying lens, this component acts as a protective barrier between the burner sight pipe and the scanner while enhancing signal strength for Fireye UV1A, 45UV5, and UV90 series sensors. The quartz material is selected for its high thermal stability and superior