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Operating and installation instructions
Thrust actuator ARI-PACO
®
2G 1,6D/Y
5.4.2.3.1 Installation procedure
If retrofitting the potentiometer, proceed as follows:
- Switch-off mains voltage and safeguard to prevent it from being switched back on again
accidentally.
- Loosen collar nut on hood, carefully remove hood.
- Insert the potentiometer into the guide in the way that the pinion (pos. 50.73) of the potentiometer
meshes with the gear stick of the trip slide.
- With a valve lift up to 30 mm, hook spiral spring (pos. 50.70) into the left-hand window of board
support (pos. 50.42) above the potentiometer guide, insert into the guide between the slide block
and the potentiometer guide and hook into the cut-out below the potentiometer.
With a valve lift between 30 mm and
40mm hook spiral spring (pos. 50.70) into the right-hand
window above the potentiometer guide, insert into the guide between the slide block and the
potentiometer guide and hook into the cut-out below the potentiometer.
- Check to see whether pinion (pos. 50.73) is pressed into toothed rack by spiral spring (pos. 50.70)
and is positioned free from backlash.
- If this is not the case, remove spiral spring (pos. 50.70), readjust by bending a little, and place back
in position again.
- Screw jack strip of connecting cable (pos. 50.68) to board support (pos. 50.42) with two self-
tapping screws (pos. 50.69) (single potentiometer connectors 25-27).
- Insert additional 3-pole connector (pos. 50.74) in jack strip of connecting cable (pos. 50.68).
- Set potentiometer (see point 5.4.2.3).
- Place hood carefully onto thrust actuator and fasten it on the actuator with the collar nut.
5.4.2.3.2 Setting
To set the potentiometer, proceed as follows:
- Move thrust actuator to extended position.
- Switch-off mains voltage and safeguard to prevent it from being switched back on again
accidentally.
- Turn potentiometer shaft in counter-clockwise direction until reaching the travel stop.
This places the potentiometer in the initial position (approx. 0 ohm).
- For checking purposes, the resistance of the potentiometer needs to be measured using an
ohmmeter.
- Measure resistance on potentiometer 1 between terminals 25 and 26.
- Measure resistance on potentiometer 2 between terminals 28 and 29.
- In this position of the actuator, the measured value should be approx. 0 ohm.
- Run thrust actuator to upper final position and read off corresponding resistance value on
ohmmeter.
- The resistance values thus measured need to be taken into account for the settings to the facility
control system.
