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Manual 5020, rev.03 07/2021 - SC/VHS 16
7.3 Manual Override
When requested, a manual override to move the actuator in case of lack of hydraulc pressure is
supplied as an integral part of the actuator itself.
For the single acting actuators type SC/VHS the manual override is based on cylinder with hydraulic
hand pump type HP.
Position of the valve and position of the manual override in relation to
the actuator availability MUST be always known.
The following paragraph 7.3.1 provides the information to enable the
operator to know the position of the manual override.
Position of the valve is provided by the local indicator described at
paragraph 2.2 item 6).
7.3.1 Indication of position of the manual override type HP
For this type of Manual Override a specific Instruction Manual 2094 is available.
By means a selector lever it is possible to select LOCAL or REMOTE operation. (see Figure 6)
When lever of the local selector is in LOCAL position, identified by a specific label fixed on device,
the manual override HP is engaged, consequently the actuator cannot be operated by remote
inhibiting its safety function. To restore the automatic function the selector lever must be rotated 90°
clockwise towards the position identified by the label REMOTE.
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