Adjustment; Right/Left Operation; Auto Close Timer Adjustment; Gate Sensitivity Adjustment - Chamberlain LiftMaster Professional SW425 Owner's Manual

Residential swing gate operator
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RIGHT/LEFT OPERATION

If the gate seems to be functioning in reverse, the Right/Left side
operation switch may need to be flipped (Figure 1). One way to
know if the operator is working in reverse is to try the sensitivity.
If pressure is applied to the gate while it is closing, it should
reverse and go open. If pressure is applied to the gate while it is
opening, it should stop and remain stopped until activated again.
If the gate operator responds differently than this, flip the
Right/Left side operation switch. If the auto close timer function
is turned on, this provides another way of knowing if the operator
is working in reverse. If, when the gate gets closed, the operator
automatically opens, the Right/Left side switch may need to be
flipped the other way.

AUTO CLOSE TIMER ADJUSTMENT

With the full systems capability control board there is the option
of using the auto close timer which will close the gate
automatically after it has opened.
To turn this feature on, flip the auto close timer to the on position
(Figure 1). To adjust the amount of time it takes for the gate to
begin closing use a small screw driver to turn the adjustment
"pot" clockwise for more time (45 second maximum) or counter
clockwise for less time. It is recommended that if the auto close
timer function is used, that there be additional safety equipment
installed to prevent the gate from closing into a vehicle or
pedestrian.

GATE SENSITIVITY ADJUSTMENT

This step is for sensitivity adjustments on the full systems
capability control board.
To make adjustments, use a small screw driver to turn the
adjustment "pots" clockwise for more sensitivity or counter
clockwise for less sensitivity (Figure 1). There are separate
adjustments for both the opening and closing directions of travel
and these must both be adjusted. Try applying force against the
gate while it is moving both open and close to test the setting
(Caution: Do not stand directly in the path of the gate while
doing this). The gate should stop or reverse easily.

LIMIT SWITCH ADJUSTMENT

The limits of travel must be adjusted so that the gate stops
correctly in the desired open and closed positions.
Adjust the open and close limits of travel by individually
loosening the set screws on the limit collars, rotate the collar,
then retighten the set screw (Figure 2). Notice that the set screw
is what presses in the limit switch. Rotating the set screw closer
to the limit switch will cause the gate operator to stop sooner,
and rotating away from the switch will cause the gate to stop
later. Be sure to adjust the close limit while the gate is open, and
adjust the open limit while the gate is closed and remember to
re-tighten the set screws.
A D J U S T M E N T
To reduce the risk of SEVERE INJURY or DEATH, disconnect
power BEFORE performing ANY adjustments.
Figure 1
LEFT/RIGHT SIDE
Figure 2
Collar
Set Screw
15
WARNING
CAUTION
OPERATION
SWITCH
Move switch up for
O T E :
right side installation and
down for left side installation

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