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The Field Controls 46086404 (Model GSK-250M) is a high-limit manual reset thermal safety switch engineered for critical spillage detection in steam boilers and high-temperature gas-fired appliances
keeping this HVAC high temperature cutout in your service truck ensures you can resolve airflow or overheating issues on the first call without guesswork on limit switch compatibility
ensuring the pilot is proven via flame rectification before energized the main gas valve
the sensor is typically connected to the H terminal
Siemens Building Technology GDE131.1P Actuator 324846-701 The Field Controls 46086404 (ModelThe Siemens GDE131. 1P is a high performance OpenAir electronic damper actuator designed for non spring return applications within commercial HVAC systems. Operating on 24V AC DC, this rotary actuator delivers 44 lb in (5 Nm) of torque, making it ideal for controlling dampers in VAV terminals, small AHUs, and local ventilation units. The GDE131. 1P supports three position control (floating) and two position on off signaling, providing versatile