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This single pole single throw (SPST) switch is designed to detect flame rollout—a dangerous condition where combustion occurs outside the heat exchanger—protecting the burner enclosure and surrounding components from thermal damage
Techs should note the 1/4" 90-degree quick-connect terminals and the dual 7/16"-24 UNS 2A threaded sample line connectors
reducing the risk of contact welding during peak summer demand
Direct OEM Compatibility: Verified as an exact replacement for the Lennox 34M7401
High Air Capacity: Capable of 432 scim at 20 psi
Antunes Controls 8224212025 Pressure Switch Els PW 17895 This single pole single throwThe Antunes Controls 8224212025 is a high precision Model ADPRO 900 air differential pressure switch designed for monitoring airflow in commercial HVACR and industrial combustion systems. This SPDT pressure switch features an adjustable set point range from 0. 05" to 9. 0" W. C., providing reliable sensing for positive, vacuum, or differential pressures. Built for robust field performance, it includes a bottom 1 4" male NPT connection and a side 1 4"
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