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the S8406-105 is the official updated version specifically designed to replace the legacy 8406-105 model and functions identically within the circuit
Compact Form Factor: Standardized dimensions allow for quick installation on York valves without interfering with adjacent piping or sensors
Key Benefits Zero Minimum Differential: Operates reliably at 0 PSI
If the switch remains open after cooling
Belimo TFRB120 Actuator 323080-701 the S8406-105 is the officialThe Belimo TFRB120 is a specialized spring return actuator designed for reliable on off control in HVAC systems. Delivering 22 in lb of torque, this fire and smoke damper actuator ensures fail safe positioning during power interruptions, making it a critical component for life safety applications. Engineered for versatility, it features a universal power supply that accepts 100 to 240 VAC, simplifying field installations across various line voltage
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