Direct Cross-Compatibility: Engineered as the updated functional equivalent for the Lennox 18L89 pressure switch

the MARS 12838 meets EIA-456-A standards for 60

the Gen2 architecture focuses on reducing the crankcase oil migration issues common in older units while providing a stable platform for energy-efficient compressor technology

which can lead to rapid board failure

the 3B3B is rated for operating temperatures up to 406°F

Siemens Building Technology 331-2794 Actuator 322055-301 Direct Cross-Compatibility: Engineered as theThe Siemens 331 2794 is a No. 6 pneumatic damper actuator engineered for precise modulation in commercial HVAC systems. This rugged, metal fabricated power unit features an integral pivot mount and a 4 inch stroke, making it a reliable solution for the gradual or positive actuation of larger air control dampers and fire smoke dampers. Operating within a 3 13 psi spring range, this actuator provides the high torque necessary for heavy duty