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Product Description
MD15-FTL-HE, MD15-FTL-OV
Datasheet 3.09-20.315-01-EN
Issue 2017-01-09 Rev 1
Valve recognition
During commissioning, the actuator detects the closing point and the total stroke of the valve.
After the batteries are changed or after the unit is successfully taught in on a radio partner, this
detection process is performed again via the Init.
Valve block protection
Block protection prevents the cone from jamming when the valve is inactive for a long time. When
block protection is active, the actuator performs a displacement of 50% once every 21 days.
If the remaining battery level is < 10% (see “Battery monitoring” section), this function is inactive.
This function can be switched on and off (see p. 20).
Automatic closing point control
The small actuator continuously monitors the closing point and corrects it if necessary.
Communication test
The radio communication path to the radio partner is checked.
Performing a communication test has no effect on the transmission/reception interval (see p. 20).
Energy block (automatic “Window open” recognition)
When a window is open, the flow of heat energy to the room is interrupted. An open window is
signified by a large and rapid temperature drop at the MD15-FTL-xx small actuator. If such a drop is
measured by the internal temperature sensor, the small actuator closes the valve for 30 min.
After 30 minutes, the small actuator returns to normal operation and the automatic “Window open”
recognition function is active again.
If the remaining battery level is < 10% (see “Battery monitoring” section), this function is inactive.
This function can be switched on and off (see p. 21).
Frost protection function
If the temperature at the integrated temperature sensor drops below 6 °C, the small actuator opens
the valve until 8 °C is reached.
Summer mode
If the status message “Summer mode on” is received from an external radio partner, the small
actuator closes the valve.
The transmission/reception interval in summer mode is permanently set to 60 minutes.
