24
Pause Time
: The pause time between opening and
closing can be adjusted from 5 to 240 seconds. Turn the
potentiometer clockwise to increase the pause time and
counterclockwise to decrease the pause time.
Opening/Closing Time
: The opening/closing time is
adjustable from 10 to 62 seconds. The approximate
opening/closing time for a 90-degree opening is 18
seconds. Turn the potentiometer clockwise to increase
the time and counterclockwise to decrease the time.
For optimal operation, set the time so that the motor
remains active for a couple of seconds after the leaf has
reached its limit stop for opening and for closing.
Leaf Delay
: You may choose to delay one leaf on
closing for overlapping gate leaves. Be sure the operator
on the leaf for delayed closing is connected to Motor 1.
On opening, the leaf connected to Motor 2 is delayed
2.5 sec.
Note
: You cannot
adjust
this opening delay of
the operator connected to Motor 2. However,
you can avoid the opening delay—and closing
delay—by connecting both operators (and their
capacitors) to Motor 1.
The time is adjustable from 0 to 28 seconds. Turn the
potentiometer clockwise to increase the time and
counterclockwise to decrease the time.
Note
: If one-leaf gate designs, be sure to set
the potentiometer for leaf delay to its minimum
(0 seconds).
Note
: If the opening/closing time is set at less
than the leaf delay time, the delayed leaf closes
at the end of the closing time.
Bleeding the
Hydraulic System
For the 750 Operator to work smoothly, it is critical that
you bleed the hydraulic system of any air. Before you
bleed the system, be sure that you have removed the
vent screw on the top, left side of the power unit.
One bleeding operation consists of the following:
•
Running the gate leaf through three open-
close cycles
•
Allowing the gate leaf system to sit idle for
5 minutes
•
Releasing the air from each end of the drive
unit through the bleed screw holes (see Fig-
ure 18)
You need to bleed the hydraulic system before setting
the gate up for normal operation.
To run the gate leaf through an open-close cycle, make
sure the gate is set up for hydraulic operation (the
Manual Release lever is turned up) in the A mode.
Activate the gate once to open, pause, and then
automatically close. The gate needs to open and close
three times.
Then you need to allow the gate to sit idle for a full five
minutes. During this time, you can disengage the
hydraulic system (turn the Manual Release lever down)
and make sure that the top cover is removed from the
drive unit to allow you access to the bleed screws on
either end of the unit.
With the hydraulic system disengaged, open the gate
leaf by hand to a half-opened position. Re-engage the
hydraulic system.
If you have a CBAC model of the 750 Operator (with
hydraulic locking in the fully opened and fully closed
positions), then first try to move the gate leaf. If you are
unable to make the gate leaf move, then you do not need
to bleed the hydraulic system.
If you do need to bleed the hydraulic system, then next
open the bleed screw that is on the same side of the
drive unit as you are. Open the screw less than a full
turn. Next, pull the gate leaf toward you until just oil
(and no bubbles) comes out of the drive unit. Then close
the bleed screw.
Next, release the air from the other end of the drive unit
in the same manner.
Finally, test the automatic operation of the gate. If the
gate does not operate smoothly, then repeat the bleeding
process again.
Adjusting the Bypass Valves
The pressure a gate leaf applies to an obstacle in its path
is determined by the bypass valve adjustment. FAAC
recommends that the gate should stop when it meets
with a force of more than 33 lb (15 kg).
WARNING!
The pressure valves may operate
the gate leaf with enough force to endanger
people and seriously damage the gate leaf
itself. Increase the pressures in small
increments (1/4 turn), and set the pressure
adjustments at the
minimum
level necessary for
the gate's operation.
