The ABNM A5 0-10V thermal actuator has been specifically designed for use with AB-QM valves DN10-32/½-1¾ inch in heating and cooling applications.Control is done by a 0-10 V signal, which isprovided either by a 3rd party room thermostator, in most cases, by a central direct digitalcontrol (DDC) system. The actuator converts the 0-10 V signal into a proportional actuator travel, which can be either linear (ABNM A5 LIN) or logarithmic/equal percentage (ABNM A5 LOG).For fan coil unit or chilled ceiling application choice of logarithmic version is recommended (water to air heat exchanger). The result will be linear system response and thus optimal room temperature control.