E: ADJUSTMENTS

DO NOT USE ADJUSTMENTS TO COMPENSATE FOR A POORLY WORKING DOOR. THIS WILL INTERFERE WITH THE PROPER OPERATION OF THE REVERSING MECHANISM AND MAY DAMAGE THE DOOR.

Adjustment #1: Opening Travel

Your opener is assembled at the factory with the trolley in the forward position with the open limit stops snapped in place on the chain, set for a standard door.

To confirm final opening travel adjustment, activate the opener to bring the door to the fully open position. When properly adjusted, center of the open limit stops should come to rest opposite the load adjusting nut.

110056-1

 

 

 

 

Load Adjusting Nut

 

 

 

 

 

 

 

 

 

Limit Stops

 

 

NOTE: If the door drifts forward, move the open limit stops toward the

 

 

 

 

 

 

power head unit. If the door does not drift forward it is still advised that you

 

 

 

 

 

 

perform one additional check. Operate manual release on the trolley and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Limit Stops

 

allow the door to seek its natural fully open position, then move the open

 

 

 

 

 

 

 

 

 

 

limit stops to align trolley to this position. If the door does not open fully at

 

 

 

 

 

 

 

Chain

 

 

 

 

its natural open position, it indicates a door spring or hardware problem that

 

 

 

 

 

 

 

 

should be referred to a door system professional.

 

 

 

 

 

 

(See instruction label on side of track for proper limit stop location.)

 

Leave One Link Open Between

Adjustment #2: Opening and Closing Force

 

 

the Two Open Limit Stops

Hex nuts for adjusting force are located on either side of the rail at the motor end. The left

hex nut, labeled “CLOSE”, adjusts the closing force; the right hex nut, labeled “OPEN”, adjusts the opening force.

Turning the hex nuts clockwise increases force; counterclockwise decreases force.

 

 

 

 

110056-2

 

Close Adjustment Nut

 

 

 

 

Your garage door opener is built with a safety system that allows the door to reverse in the close direction and stop in the open direction. This must be adjusted so your opener does not use excessive force in the down direction or react to the weight of the door during upward travel.

To help determine that the force is not excessive, grasp the door handle or bottom edge during downward travel. The opener should reverse to this force. Do not stand under the door during this test.

If the handle is hard to hold and the door does not reverse, adjust the CLOSE hex nut to decrease force until the door reacts properly.

Open Adjustment Nut

Repeat the adjustment procedure for upward travel. The door should stop without using excessive force.

Adjustment #3: Obstruction Sensing at Close Limit Position

Your opener is designed to automatically reverse the door during closing travel whenever it comes into contact with an object up to the last 1 inch of travel above the floor. An object on the floor with a height of less than 1 inch will cause the door to stop. (Test according to the instructions in Installation Step 19.)

If the opener reverses properly with a 2” x 4” laid flat on the garage floor (Installation Step 19) and stops in the fully closed position, proceed to Adjustment #4.

If the door reverses when it comes into contact with the floor, move the close limit stop, located on the left side (inside looking out, see figure Adjustment #1), towards the power head unit. It is advised that you move the close limit stop one link at a time and run opener through another close cycle, until the door stops when it comes into contact with the floor.

WARNING

IF LIMITS ARE NOT ADJUSTED PROPERLY, THE EMERGENCY RELEASE MECHANISM MAY NOT WORK PROPERLY AND DOOR OPERATION COULD RESULT IN DOOR DAMAGE, SERIOUS PERSONAL INJURY OR DEATH!

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Allstar Products Group LT 50 Adjustments, Adjustment #1 Opening Travel, Adjustment #2 Opening and Closing Force
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LT 50 specifications

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