technicians should verify the directional flow arrow on the housing to ensure proper orientation relative to the return line

the HK42FZ011 stabilizes input voltage to protect sensitive downstream components from electrical fluctuations

Rated for 440Vac 50/60Hz

the Bard S8407-069 Transformer is a critical component for reliable control circuit operation

Key Benefits Precise Thermal Protection: Engineered to open at 135°F

Utica-Dunkirk FE3980C040 Temperature Sensor mario technicians should verify the directionalThe Utica Dunkirk FE3980C040 Temperature Sensor is a precision engineered immersion style thermistor designed for high accuracy thermal monitoring in hydronic heating applications. Built with a rugged stainless steel housing and standard NPT thread mounting, this sensor provides a reliable analog (4 20 mA) output signal for seamless integration with modulating boiler controls and building automation systems. Field technicians recognize this as a