Automatic Mode - Resol VA300 Manuel

2. Operation
The actuator is equipped with a manual adjustment device
which can be operated by means of a screw driver. Two operat-
ing modes can be adjusted using this manual adjustment device:
• Manual mode

• Automatic mode

WARNING! Electric shock!
Disconnect the actuator from the power
supply before changing the setting!
Manual mode:
The actuator opens the valve regardless of the
voltage applied. This position facilitates installation
and enables system operation even when the con-
troller malfunctions.
Automatic mode:
The actuator controls the valve according to the
voltage applied. This position is mandatory for
normal operation.
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3. Stroke indicator
The stroke indicator behind the transparent cover at the front
of the actuator indicates how far the valve is opened. It is used
as a function control of the actuator.
SVA-NC:
When the indicator is in the „open" position after the operat-
ing voltage has been applied to the valve for approx. 3 minutes,
the unit operates without any fault. When the unit is discon-
nected from the power supply, it must return to the „closed"
position within approx. 3 minutes.
The SVA-NO actuator works vice versa.
„Closed" position
The indicator is visibe at the lower edge of the window: the
electrothermal actuator keeps the valve closed.
„Open" position
The indicator fills almost all of the transparent cover: the elec-
trothermal actuator keeps the valve open.