Common Questions What is the fail-safe position of this valve

By delivering real-time feedback on indoor air quality

including R-410A and R-744 (CO2) systems

Which belt size provides the best performance

Resideo VC7931ZZ11 Modulating Actuator R-407A Common Questions What is theThe Resideo VC7931ZZ11 Modulating Actuator provides high precision control for hydronic systems, including fan coil units, radiators, and convectors. Operating on a 24Vac power supply, this linear actuator accepts an analog (0)2 10 Vdc control signal to modulate flow with surgical accuracy. Designed with a double insulated plastic housing and an IP40 rating, the VC series actuator ensures a long service life by de energizing the motor whenever it is