Siemens Building Technology 540-680FA Sensor Freon Key Benefits: OEM Compatibility: Exact

Key Benefits: OEM Compatibility: Exact replacement for Lochinvar 100187859 and A

ignition wires

providing technicians with a reliable solution for upgrading legacy pneumatic to electronic conversions

Common indicators include the furnace failing to ignite despite a glowing ignitor

as well as various electric actuator series for automated control

Siemens Building Technology 540-680FA Sensor Freon Key Benefits: OEM Compatibility: ExactThe Siemens Building Technology 540 680FA is a Series 1000 wall mounted room temperature sensor designed for seamless integration with Terminal Equipment Controllers (TEC) and LONMARK compliant systems. This desert beige unit features a high precision 10K Ohm Type II NTC thermistor, ensuring accurate thermal feedback within a standard operating range of 55F to 95F. Engineered for professional grade HVAC automation, the 540 680FA includes a secondary