Chamberlain LiftMaster LA100 Owner's Manual page 22

Light-duty residential dc actuator gate operator
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4
GATE FORCE SENSITIVITY ADJUSTMENT
Do not use force adjustments to compensate for a binding
or sticking gate. Excessive force will interfere with proper
operation of the safety reverse system and may cause
damage to the gate or operator.
The gate operator will automatically detect how much
force is required to open and close the gate under normal
conditions, however, the user must initialize the Gate Force
Sensitivity. The Gate Force must be carefully adjusted
to allow the gate to reverse when an obstruction is
encountered. This adjustment determines how much force
is allowed before the gate reverses after making contact with
an obstruction. If the Gate Force is set too light, gate travel
may be interrupted by nuisance reversals in either the open
or close directions. Weather conditions can effect the gate
movement, occasional adjustments may be necessary.
The Gate Force Sensitivity Adjustment control is located on
the control board. Maximum force adjustment range is 260
degrees, about 3/4 of a turn. Do not force the control beyond
that point. By turning the Gate Force control clockwise
will decrease the amount of force and turning the control
counter clockwise will increase the force.
5
TEST CLOSE FORCE
With the gate in the open position and the Gate Force control
set to MIN, place the cardboard container the gate operator
was shipped in against the close side latch post, such that
the gate will hit the box when it closes. Press the remote
control to close the gate. The gate should reverse when the
gate hits the box and return to the full open position.
6
TEST OPEN FORCE
With the gate in the closed position and the Gate Force
control set to MIN, place the cardboard container against an
entrapment area on the open side. Press the remote control
to open the gate. The gate should reverse when the gate hits
the box and return to the closed position.
The Gate Force Sensitivity Adjustment control can be adjusted
to help eliminate nuisance reversals, however, the gate should
be tested as stated above after any adjustment of the Gate Force
control. Make small adjustments until adequate force is obtained
to minimize nuisance reversals while maintaining reversals off the
box as described above.
Once the gate travel and learn limit have been programmed as
described above, the gate is ready to be used. The gate can be
controlled via wireless remote controls (see Accessories). To open
the gate, the user must press and release the button on the remote
control. The gate will begin opening and stop at the open position.
To close the gate, the user must press and release the button on
the remote control. The gate will begin closing and stop at the
closed position. When the gate is traveling and another command
is given from the remote control, the gate will stop. The next
command given will make the gate travel in the opposite direction
and stop at the corresponding open or closed position.
Programming
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing gate.
• Too much force on gate will interfere with proper operation
of safety reversal system.
• NEVER increase force beyond minimum amount required to
close gate.
• NEVER use force adjustments to compensate for a binding
or sticking gate.
• If one control (force or travel limits) is adjusted, the other
control may also need adjustment.
• After ANY adjustments are made, the safety reversal system
MUST be tested. Gate MUST reverse on contact with a rigid
object.
Rigid Object
Force Adjustment
22
FORCE

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