BFT SUB Instructions D'installation page 25

- Position grooved bush "B" in the actuator shaft.
- Temporarily fasten the shoe to the leaf: mount the leaf in its completely closed
position, placed over the actuator shaft and perfectly aligned to the rotation axis.
- Before welding bush "B" to the U-shaped shoe, the right fixing point must be
found. To determine the correct point, proceed as described below.
WARNING: Do not weld bush "B" directly to the leaf. Do not weld the grooved
bush to the actuator output shaft.
8.1) Version without slow-down function
- Release the jack with key "CS" supplied, in the way shown in fig.18.
- With the help of pliers, completely rotate the output shaft in the direction of
gate closing along its entire stroke.
- Arrange small card "CA" (fig.11) by positioning point "M" in correspondence with
the arrow in the casting.
- Rotate the shaft and bring point "G" (right-r.h. or left-l.h.) in correspondence
with the arrow.
- Protect the actuator from any metal spots during the subsequent welding phase.
- The bush can now be welded to the shoe with the leaf mounted in the gate
closed and stopped position. Disassemble the shoe to weld bush "B" all the way
around its circumference.
- Any small defects in levelling foundation plate "P" can be corrected by means
of adjustment dowels "GR" (fig.3).
- Place the gate stop on opening in the required position; however, the gate stop
must maintain an extra rotation of at least 5° for safety, in order to prevent the
rack from reaching its end of travel.
NOTE: The rotation degrees of the SUB R versions are highlighted in fig. 12;
in the case of versions without slow-down function, consider the slow-down
angles (25°+25°) as normal speed. For the SUB G versions, take into account a
total rotation of 185°. For effective 180° openings, the safety margin is 2.5° both
on closing and on opening.
8.2) Version with slow-down function
The versions provided with slow-down function need particular attention in
identifying the fixing point of grooved bush "B" (fig.3). It is advisable to use the
actuator in a symmetrical way; fig.12 shows the 130 degrees of total rotation of
an ordinary actuator, divided into the various phases. By way of example, fig.13
shows the correct operation method for an actuator carrying out a leaf opening
manoeuvre of 90°, that is 20°+ 20° for safety, 70° for normal stroke and 10°+ 10°
for slow-down. In order to obtain the angles described, use small card "CA" on
the "SUB R mod. " side (fig.11).
WARNING: For effective opening manoeuvres of less than 90°, slow-down cannot
be obtained in both directions. You need to decide beforehand whether to have
slow-down on closing or opening, taking into account that slow-down begins to
happen in the last 25°- 30° of shaft rotation, both on opening and closing (fig.14).
Having determined the correct angle for fixing the grooved bush, fix it in the way
described in paragraphs 8 - 8.1.
NOTE: For the SUB GR versions, take into account a total rotation of 185°, out of
which: 2.5°+ 2.5° for safety, 25°+ 25° for slow-down and 125° for stroke at normal
speed. This provides a maximum rotation of 180°.
8.3) Slow-down adjustment (R versions only)
Slow-down adjustment screws "VR" are highlighted in fig.15, and can be adjusted
by means of a 3-mm Allen wrench. This must be turned clockwise to make the
movement slower and anticlockwise to make is less slow. Adjust the slow-down
speed so as to prevent the leaf from slamming when it stops.
8.4) Installation with slide arm (to one side of the hinge-pivot)
This type of installation is illustrated in fig.9. The installation method is described
in paragraph 6.5. Furthermore, the actuator support base must be tightly secured
to the foundation base by means of screws, and not just fastened by the four
angle bars as in the case of installation under the hinge-pivot.
9) STOP PLATES
The use of ground stop plates "F" (fig.20) is compulsory both on opening and
closing. The stop plates must lock the leaf while maintaining a safety extra-stroke
of 5° at least (fig.12).
10) LEAF PHASE DIFFERENCE
In the case where the leaves overlap during the closing manoeuvre, the phase
difference on closing is set by means of the appropriate trimmer included in the
electronic control unit. The motor of the delayed leaf must be connected to the
terminals of the control unit, which are identified by the "Mr" symbol as illustrated
in the control unit wiring diagram.
11) ELECTRIC LOCK FITTING
This is only needed for models without hydraulic lock on closing (Table 1). The
EBP mod. electric lock (fig.16) consists of a continuous- service electromagnet
hooked to the ground. This device remains energised during the whole gearmo-
tor operation time, allowing catch "D" to reach the closing stop point without
opposing any resistance; this factor allows the pushing load to be reduced on
closing, thus improving antisquash safety.
12) PUSHING FORCE ADJUSTMENT (Fig.1)
This is obtained by means of two valves, marked by the writing "close" and "open"
respectively, used to adjust the pushing force on closing and opening. If the valves
are turned towards the "+" sign the force is increased, if they are turned towards
INSTALLATION MANUAL
the "-" sign it is decreased. To obtain good antisquash safety, the pushing force
must be slightly greater than that needed to move the leaf, both on closing and
opening; however, the force, measured at the leaf edge, must not exceed the
limits set out by the current national standards. The actuator is not provided with
electrical limit switches. Therefore the motors are switched off at the end of the
operation time set in the control unit. Such operation time must exceed by about
2-3 seconds the moment where the leaves meet the ground stop plates. For this
reason as well as for safety reasons, under no circumstances must the by-pass
valves be completely closed.
13) MANUAL OPENING
In case of emergency, for instance when there is no power available, the gate
must be opened by hand.
13.1) Versions without hydraulic locks (electric lock)
As these models are irreversible, in order to move the gate by hand you only need to
open the electric lock by means of the appropriate key, and push the leaves with a
force strong enough to win that adjusted with the by-pass valves (approximately 15
kg/150N). In order to make the manoeuvre easier, it may also be helpful to activate
the hydraulic lock in the way described below.
13.2) Versions with hydraulic locks (Fig.17)
- Unscrew cap "T" which is found on the cover of each actuator (usually on the
inside).
- Insert the release key supplied in triangular release pivot PST and rotate it
anticlockwise by a few turns (CS in fig.18).
- Push the leaf by hand at a speed similar to that of motorised operation.
- To restore motorised operation, turn the key clockwise until it is completely
tightened, screw the release cap onto the cover and put the key in a place
which is known to all users.
NOTE: In order to avoid oxidation of the release device, it is helpful to fill its
triangular seat with grease.
14) AUTOMATION CHECK
Before finally making the automation fully operative, carefully carry out the fol-
lowing procedure:
- Check that all components are tightly secured.
- Check the correct functioning of all safety devices (photocells, pneumatic
edge etc.).
- Check the emergency manoeuvre command.
- Check the opening and closing operations with the control devices in use.
- Check the standard (or customised) electronic function logic in the control
unit.
15) AUTOMATION OPERATION
As automation can be remotely controlled by means of a radio control or start
button, it is essential to frequently check that all safety devices are perfectly ef-
ficient. In case of any operational malfunction, take immediate action and request
the assistance of qualified personnel. It is recommended to keep children at a
safe distance from the automation field of action.
16) CONTROL
The automation system is used to obtain motorised gate opening and closing.
There are different types of control (manual, radio, magnetic badge access con-
trol, etc.) depending on the installation requirements and characteristics. For the
various control systems, see the relevant instructions. All automation users must
be instructed on proper control and use.
17) MAINTENANCE
All maintenance on the controller must be performed with the systems power
supply shut off. Check periodically for oil leaks. When topping-up the oil, always
use oil of the same type (see data table) and proceed as follows:
a) Remove the cap "P" (fig.3).
b) Top-up with oil until it reaches 1.5 mm on the oil cap hole.
c) Reassemble all of the unit.
ATTENTION: The oil of each actuator must be replaced completely every two
years. Only use oil of the same type (see data table).
- Check the safety devices of the automation.
- When any operational malfunction is not resolved, disconnect the power supply
from the system and request the assistance of qualified personnel.
- If the leaves move jerkily, or if excessive noise is noticed during manoeuvring,
this could be due to air being trapped in the hydraulic circuit, and therefore
a bleed operation may be required.
17.1) Oil bleed
NOTE: The actuator is supplied without air in the hydraulic circuit. If a bleed
operation is required, proceed as described below.
a) Remove the cover from the actuator.
b) Activate the opening command and loosen the bleed screw (S) for opening
(fig.19-20) during leaf movement.
c) Let the air out until non-emulsified oil appears (if possible, try to prevent the
oil leaking out of the bleed screw from falling into the foundation case).
d) Tighten the bleed screw before the actuator runs out of operation time.
e) Activate the closing command and loosen the bleed screw for closing (which
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