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Part 6a: U Series
Door speed adjustments and fine tuning continued.
Note: Only for U series operators
B. Door slows too soon when closing
Step 1- Speed control valve closest to wall controls down. Follow same procedure as Part A, Step 2.
C. Door opens slowly and closes rapidly.
Step 1- If counter weights are available, add more weight if necessary. For doors with springs you may need to add more tension.
D. Door goes halfway and stops
Step 1- Check the door itself to make sure nothing is binding the door. Also check speed control valves to make sure they are adjusted properly.
Part 6b: S Series
Door speed adjustments and fine tuning
Note: Only for S series operators
A. Door Slows Down too Soon When Opening:
1.Locate the airflow control screw on the bottom of the up cylinder (farthest from the wall).
2.Turn the airflow control valve one complete turn counter clockwise or until the door operates properly.
Note: Use caution: Unscrewing too far will cause it to come out. When screwing it back in, pay attention to the two holes adjacent to each other on the bottom cap. Placing the screw in the wrong hole causes the loss of the cushioning effect. The correct hole has threads.
B. Door Opens too Quickly (Bangs or Slams Into Upper Limit):
1.Locate the airflow control screw on the bottom of the up cylinder (farthest from the wall).
2.Turn the airflow control screw one complete turn clockwise or until the door operates properly.
