25
Step 28: Setting Door Opening
Travel
Do not use adjustments to compensate for a poorly
balanced door. This will interfere with the proper
operation of the travel adjustments and may damage
door.
The door opener is assembled with the open travel
adjustment preset for a typical door, but all doors should be
adjusted to stop as close as possible to the door’s “natural”
fully open, resting position.
To determine the door’s “natural” fully open, resting position, disconnect door from opener using the Emergency Release
Disconnect (see page 32,
HOW TO OPERATE YOUR DOOR MANUALLY) and manually raise door to its “natural” fully
open, resting position. Use this location for your open limit setting. To determine if door needs adjustment, activate the
opener to bring door to fully open position.
NOTE: If door does not open fully and opener light flashes (make sure the bulb is installed and operating) check
for an obstruction or see Adjustment #1, page 27 (Adjusting Opening Force).
To adjust for a non-standard door or to precisely set the open position: Using the wall station, operate the door and stop it
in mid-travel position; using a flathead screwdriver turn the OPEN travel adjuster for more (counter-clockwise) or less
(clockwise) travel. A 1/4 turn equals approximately 1” of trolley movement.
NOTE: Confirm that the door has stopped in the UP position as a result
of the Upper Limit Switch and not because the Trolley has hit the open
Stop Bolt, which is mounted in the Rail near the power head. The
correct condition can be verified by observing that the openers
Convenience Light does not flash after the fully open door comes to a
stop. The faulty condition may also be confirmed visually by checking
to see if the Trolley is resting against the stop bolt.
To confirm final OPEN travel adjustment, activate the opener to bring door to
fully open position. The opener light should
not
be flashing.
Step 29: Infrared Safety Sensor Obstruction Test
Test Procedure
Starting with the door in the fully open
position, place a 6” High object on the floor
progressively one foot from the left side of
the door; center of door and one foot from
the right side of door (as illustrated). In each
position, activation of the opener with the
wall station should cause the door to move
approximately one foot, stop and then
reverse to fully open position. The same 6”
High object when placed on the floor should
also cause a closing door to reverse.
If the door does not respond properly to these tests, the Infrared Safety Sensors must be adjusted (refer to step 21 or 22
depending on type of sensors used). Repeat this test procedure. If the door opener still will not respond properly and fails
this test, the door may cause severe injury or death. Have a qualified service person make repairs.
