Schneider 24VAC Field Selectable Control Signal Valve Actuator

MZ20A is a zone actuator designed to provide modulating control together with VZ*19* zone valves.  The M20A actuator is used in fan-coil-units, induction
units, small reheaters and recoolers, and for zone control applications.

Actuators are available in two modulating versions:
- MZ20A with a selectable command range
- MZ20A-R 0-10 V only

Reliable longtime operation is ensured from no mechanical feedback potentiometer and no mechanical endswitches. Automatic synchronization function provides self adjusting close off.  Based on a full stroke running time of 100 s, valve positioning and flow adjustment is very exact.  Manual override available on all versions.