Belimo B249 Valve 326070-701 technicians should refer to the

technicians should refer to the unit's original wiring diagram to confirm lead connections and mounting orientation

This specific part is the heater element assembly

while the sensor operates as a non-communicating device for temperature sensing

offering a robust safety margin over standard 250V variants for better heat dissipation and long-term reliability

and safety shutdown functions to help ensure reliable burner operation

Belimo B249 Valve 326070-701 technicians should refer to theThe Belimo B249 is a high performance 2 way characterized control valve designed for precision in hydronic systems. Featuring a 2 inch NPT female connection and a 46 Cv rating, this valve utilizes a specialized Tefzel characterizing disc to maintain an equal percentage flow characteristic. This design effectively eliminates the "hunting" common in standard ball valves, providing stable control across air handling units, VAV boxes, and fan coil