Schneider Electric (Square D) LC1D18U7 Contactor 322838-753 Technicians should verify static pressure

Technicians should verify static pressure and airflow across the coil when troubleshooting frequent trips

Smith Cyclone Mxi models (BTH

and VA-805x series electric actuators depending on the linkage used

Direct Replacement Logic: Serves as the official 129431-L3 substitute

Using genuine HVAC replacement parts like the 3H0346700008 maintains the integrity of the burner assembly and ensures correct flame characteristics under high-demand cycles

Schneider Electric (Square D) LC1D18U7 Contactor 322838-753 Technicians should verify static pressureThe Schneider Electric LC1D18U7 is a heavy duty TeSys D IEC contactor engineered for precise motor control and inductive load switching. This 3 pole non reversing contactor features a 240VAC 50 60Hz coil and is rated for 18 Amps at 440V AC 3. Designed as a rugged magnetic contactor for industrial and HVACR applications, it provides reliable switching for motors up to 10 HP at 480V. The compact 45mm width ensures efficient rail or surface mounting,