en
Standard Assembly (Door mounted inwards)
Release the trolley and slide the connection arm into the
slot of the door arm.
Do not move the door arm. Leave in upright position.
1. Trolley
2. Connection Arm
3. Canopy Door Arm
4. Shipping cable tie
5. Screw 5/16” - 18 x 7/8”
6. Nut
PICTURE 15
1. Trolley
2. Connection Arm
3. Canopy Door Arm
Garage door with inward protruding lintel
1. To install the Chamberlain Door Arm at inward protruding lintel situations the door
arm must be mounted in a different way.
2. Cut down the door arm supplied with your garage door operner (275mm).
3. Mount the cut down door arm to the trolley as shown. Do not use the slotted arm supplied with the Chamberlain
Door Arm.
4. Take the curved door arm supplied with the Garage Door Opener and fit all as shown together. If you disconnect
the trolley you can move it easily in any position for the installation. Use M8 screws with lock nuts (not supplied).
5. Tighten the screws fully and back them off again 1/2 turn.
Open the garage door slowly and carefully by hand. Watch the movement of the door arm. If the Chamberlain Door
Arm hits the rail before the garage door is fully open, the angle of the arms must change. Close the garage door
and use another hole to change the angle of the system. Try again until the Chamberlain Door Arm does not hit the
rail anymore. In some cases raising the operator head is quicker.
