56 EB 8384-0 EN
Decommissioning and removal
9.1 Emergency action
Upon failure of the air supply or electric sig-
nal, the positioner vents the actuator, causing
the valve to move to the fail-safe position de-
termined by the actuator.
Emergency action in the event of valve or ac-
tuator failure is described in the associated
valve and actuator documentation.
Î The plant operator is responsible for
emergency action to be taken in the
plant.
10 Decommissioning and
removal
Risk of fatal injury due to ineffective explo-
sion protection.
The explosion protection becomes ineffective
when the positioner cover is opened.
The following regulations apply to installa-
tion in hazardous areas: EN60079-14
(VDE0165, Part1).
The process is disturbed by interrupting
closed-loop control.
Do not mount or service the positioner while
the process is running and only after isolat-
ing the plant by closing the shut-off valves.
10.1 Decommissioning
To decommission the positioner before re-
moving it, proceed as follows:
1. Disconnect and lock the air supply and
signal pressure.
2. Open the positioner cover and discon-
nect the wires for the control signal.
10.2 Removing the positioner
1. Disconnect the wires for the control sig-
nal from the positioner.
2. Disconnect the lines for supply air and
signal pressure (not required for direct
attachment using a connection block).
3. To remove the positioner, loosen the three
fastening screws on the positioner.
10.3 Disposal
Î Observe local, national and internation-
al refuse regulations.
Î Do not dispose of components, lubricants
and hazardous substances together with
your other household waste.
Tip
DANGER
!
NOTICE
!
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