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

The MEC320R is optimized for the MEP300

Enhanced Durability: Engineered to withstand high-pressure environments

or two-position signaling

supporting heat pump and hot gas defrost cycles

Resideo VU843A1020 Actuator 318172-701 Professional-grade motor control requires componentsThe 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.