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MAN 604A Rev. 5
Operation and Use
Section 3: Operation and Use
June 2020
Installation, Operation and Maintenance Manual
3.4.2 Electrical Connections
Connect the electrical feed, control and signal lines to the actuator, by linking them up with
the terminal blocks of the electrical components. In order to do this, the housing covers
must be removed without damaging the coupling surfaces, the O-rings or the gaskets.
Remove the plugs from the cable entries.
For electrical connections use components (cable glands, cables, hoses, conduits) which
meet the requirements and codes applicable to the plant specications (mechanical
protection and/or explosion-proof protection).
Screw the cable glands tightly into the threaded inlets, so as to guarantee the
weatherproof and explosion-proof protection (when applicable).
Insert the connection cables into the electrical enclosures through the cable glands, and
connect the cable wires to the terminals according to the applicable wiring diagram.
If conduits are used, it is advisable to carry out the connection to the electrical enclosures
by inserting hoses so as not to cause anomalous stress on the housing cable entries.
Replace the plastic plugs of the unused enclosure entries by metal ones, to guarantee
perfect weatherproof tightness and to comply with the explosion-proof protection codes
(where applicable).
Once the connections are completed, check that the controls and signals work properly.
3.5 Start-up
During the start-up of the actuator, proceed as follows:
1. Check that the pressure and quality of the air supply (ltering degree, dehydration)
are as prescript. Check that the feed voltage values of the electric components
(solenoid valve coils, micro-switches, pressure switches, etc.) are as prescript.
2. Check that the actuator controls work properly (remote control, local control,
emergency controls, etc.)
3. Check that the required remote signals (valve position, air pressure, etc.)
are correct.
4. Check that the setting of the components of the actuator control unit
(pressure regulator, pressure switches, ow control valves, etc.) meet the
plant requirements.
5. Check that there are not leaks in the pneumatic connections. If necessary tighten
the nuts of the pipe ttings.
6. Remove all rust and, in accordance with the applicable painting specications,
repair paint-coat that has been damaged during transport, storage or assembly.
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