Benefits
- First Open function
- Manual Re-Open function without power applied
- Stroke indicator
- Integrated limit switch for circulation pump
- Either as 24 V or as 230 V version
Application
For controlling the hot water valves in radiators or AFRISO distribution manifolds such as heating/ cooling circuit manifolds ProCalida® MC, EF, VA and IN. Actuators convert the electrical signal received from room or timer thermostats into a valve stroke to control the set temperature via the fl ow volume. The actuator is factory-opened (First Open function) so that the stroke valves at the heating circuit manifold remain open during initial commissioning. This facilitates mounting as well as fi lling and f l ushing of the system since, at this point in time, the control system is usually not yet operative. The First Open function (FO) is automatically disabled as soon as the actuator is electrically connected and fully closed. The FO function can also be manually deactivated by lifting the stroke indicator with a screwdriver. When the stroke indicator is lifted, the "clip Re-Open" is “ relieved and disables the FO function. For servicing, the factory setting "open" of the actuator can be restored manually via the clip without power having to be applied. To do so, lift the stroke indicator with a screwdriver until the clip can be pushed below the stroke indicator. The pre-load of the stroke indicator keeps the clip in position and the FO function is active again.
