Thermal actuators VAO is used in secondary heating and cooling systems.
The actuator is adapted to MMA's thermostatic valves with thread M28 * 1.5
(ex FVR, Evoflow or Flexkoppel).
VAO is regulated by room control center R41.
VAO is also available with connection M30 * 1.5 for other valves
make or underfloor heating distributor.

Description
The thermostat actuator's characteristic is "on / off".
In the event of a power failure, the actuator NO opens.
The actuator is provided with operating position indication above the nut.
Red - closed
Black - open
The actuator is connected with the supplied cable attached to the underside of the actuator.