or two-position signaling

Professional-grade motor control requires components that handle thermal and electrical stress without failure

Rely on these dielectric flange accessories to preserve the electrical break required in professional HVACR and plumbing installs

Whether you are performing a seasonal tune-up or responding to a "no heat" service call

Resideo VU843A1020 Actuator 318172-701 or two-position signalingThe Resideo VU843A1020 is a heavy duty fan coil actuator engineered for commercial hydronic systems requiring reliable two position control. Operating on 24 Vac, this spring return actuator is designed for seamless integration with VU52, VU53, and VU54 series valve bodies. Featuring an SPST controller connection, the unit provides a full 22 degree stroke with a 15 second motorized timing and a rapid 4 second spring return for precise flow management.