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System Integrity: Fast-acting SPST switch logic provides immediate feedback to the control board to protect against combustion or airflow failures
The Armstrong Furnace R44957-001 Control is a critical OEM replacement ignition blower control designed to manage the combustion and air circulation cycles in high-efficiency heating systems
Standardized 170°F Open / 140°F Close calibration for accurate system protection
it utilizes NBR seals to maintain a bubble-tight shut-off across a pressure range of 0-125 PSI
Featuring a 24-inch diameter and a specific 27-degree pitch
Siemens Building Technology GRD221.1U Actuator 322838-753 System Integrity: Fast-acting SPST switchThe Siemens Building Technology GRD221. 1U Actuator is a specialized 120V fire and smoke damper actuator designed for critical life safety HVACR applications. As a veteran grade two position spring return actuator, it delivers 30 lb in of torque, ensuring reliable open close operation for smoke control and combination fire smoke dampers. Built to exceed the rigors of UL555 and UL555S standards, this unit provides a nominal 30 second drive time and a
