Belimo LF24 ECON R03 Actuator Motor Freon most HVAC technicians look for most HVAC technicians look for a reading between 25 and 30mV Field technicians should verify the millivolt output and terminal connections during installation to ensure seamless integration with the existing control board and pilot burner assembly in M1 series furnaces The integrated 3K Ohm thermistor allows the actuator to interface directly with economizer controllers to monitor mixed air or discharge air temperatures without requiring secondary external sensors Integrated 3K Ohm Thermistor: Simplifies wiring by providing onboard temperature sensing for economizer logic