June 2021
Installation, Operation and Maintenance Manual
MAN 689 Rev. 6
Operation and Use
24
Section 3: Operation and Use
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 (filtering degree,
dehydration) are as prescript. Check that the feed voltage values of the electric
components (solenoid valve coils, microswitches, 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, flow 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 fittings.
6.
Remove all rust and, in accordance with the applicable painting specifications,
repair paint-coat that has been damaged during transport, storage or assembly.
NOTICE
To allow the air and spring stroke, you must keep the “MHP” hydraulic manual override in
the released position, see Figure 19.
Figure 19
STOP VALVE CLOSED FOR
HANDPUMP OPERATION
STOP VALVE OPEN FOR
SPRING OPERATION
LOCAL CONTROL
