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Using the OEM 1-pole version preserves the intended circuit path
A trip is usually triggered by a cracked heat exchanger
This programmable timer relay supports multiple operating modes
06 inches in length and 2
providing reliable 24V power step-down
Cleveland Controls DFS-231-121 Switch Els PW 17895 Using the OEM 1-pole versionThe Cleveland Controls DFS 231 121 is a fixed setpoint diaphragm differential pressure switch engineered for precision performance in HVAC pressure monitoring and combustion air applications. This SPDT air flow switch is factory calibrated to actuate on a pressure rise at 0. 05" . 02" w. c., providing a reliable safety interlock for systems requiring strict static pressure thresholds. Designed for versatility, the unit supports line voltage ranges