Chamberlain 3575CS Manuale Utente

22

 • 

 

Fasten the straight and curved door arm sections 
together to the longest possible length (with a 2 or 3 
hole overlap).

 • 

 

With the door closed, connect the straight door arm 
section to the door bracket with the 5/16"x1-1/4" clevis 
pin.

 • 

 

Secure with a ring fastener.

 • 

 

On one-piece doors, before connecting the door arm 
to the trolley, the travel limits must be adjusted. Limit 
adjust ment screws are located on the left side panel 
as shown on page 23. Follow adjustment procedures 
below.

    -  Turn the UP limit adjustment screw counter-clockwise 

4 turns.

    -  Press the Door Control push button. The trolley will 

travel to the fully open position.

    -  Manually raise the door to the open position (parallel 

to the floor), and lift the door arm to the trolley. The 
arm should touch the trolley just in back of the door 
arm connector hole. Refer to the fully open trolley/
door arm positions in the illustration. If the arm does 
not extend far enough, adjust the limit further. One 
full turn equals 

3" (7.5 cm) of trolley travel.

    -  Turn the DOWN limit adjustment screw clockwise 

4 complete turns.

Nuts
5/16"-18

Lock
Washers
5/16"

Ring
Fastener

Straight
Arm

Bolts
5/16"-18x7/8

Door
Bracket

Clevis Pin
5/16"x1-1/4"

Curved
Door Arm

    -  Press the Door Control push button. The trolley will 

travel to the fully closed position.

    -  Manually close the door and lift the door arm to the 

trolley. The arm should touch the trolley just ahead of 
the door arm connector hole. Refer to the fully closed 
trolley/door arm positions in the illustration. If the arm 
is behind the connector hole, adjust the limit further. 
One full turn equals 

3" (7.5 cm) of trolley travel.

 • 

 

Close the door and join the curved arm to the 
connector hole in the trolley with the remaining clevis 
pin. It may be necessary to lift the door slightly to make 
the connection.

 • 

 

Secure with a ring fastener.

 • 

 

Run the opener through a complete travel cycle. If the 
door has a slight "backward" slant in full open position 
as shown in the illustration, decrease the UP limit until 
the door is parallel to the floor.

NOTE: When setting the up limit on the following page, the 
door should not have a "backward" slant when fully open 
as illustrated below. A slight backward slant will cause 
unnecessary bucking and/or jerking operation as the door 
is being opened or closed from the fully open position. 

Door Arm

Door Arm
Connector Hole

Closed
Door

Outer Trolley

Emergency Release Handle

Inner Trolley

Outer Trolley

Open Door

Door Arm

Correct Angle

Door with
Backward Slant (Incorrect)

Inner Trolley