14 – ENGLISH
4. repeat the operation by positioning the boom also at
roughly 20° and 70°. If the boom remains stationary in its
position, it means that it is correctly balanced; a slight im-
balance is allowed, but the boom must never move sub-
stantially
5. lock the gearmotor.
3.11 MANUALLY UNLOCKING AND LOCKING THE
GEARMOTOR
The gearmotor is equipped with a mechanical unlocking system
that allows for opening and closing the boom manually.
These manual operations should only be performed in case of
a power outage, malfunctions or during the installation phases.
To unlock the device:
1. insert the key (A) and turn it by 180° towards the left or
right
A
A
30
2. the gate leaf can now be moved manually to the desired
position.
To lock the device:
1. turn the key (A) back to its initial position
2. remove the key.
To shift the lock cylinder to the opposite side of the gear-
motor:
1. insert the key (A) and turn it by 180° clockwise
2. from inside the cubicle, pull downwards the U-shaped
spring (B) that locks the lock cylinder
3. remove the cylinder (C) from the cubicle by pulling it out-
wards
A
B
C
31
4. remove the rubber cap on the opposite side of the cubicle
and insert the lock cylinder through the hole
5. from inside the cubicle, insert from bottom to top the
U-shaped spring to lock the lock cylinder
6. turn the key (A) back to its initial position
7. remove the key.
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