Connect The Door Arm To The Trolley - Chamberlain LiftMaster Security+ 1210EM FS2 Owner's Manual

ALL ONE-PIECE DOORS
1. Assemble the door arm, Figure 5:
IMPORTANT: The groove on the straight door arm
MUST face away from the curved door arm.
• 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.
2. Adjustment procedures, Figure 6:
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 29. Follow
adjustment procedures below.
• Open door adjustment: decrease UP travel
limit
– Turn the UP limit adjustment screw
counter-clockwise 4 turns.
– Press the Door Control push bar. 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 5 cm of trolley travel.
• Closed door adjustment: decrease DOWN
travel limit
– Turn the DOWN limit adjustment screw
clockwise 4 complete turns.
Figure 6
Inner Trolley
Door Arm
Connector Hole
Door Arm
Closed
Door
Outer Trolley
Emergency Release Handle
Inner Trolley
Open Door
Figure 5 CORRECT
Straight
Door Arm
(Groove
facing out)
Door
Bracket
Clevis Pin Straight
5/16"x1-1/4" Arm
Bolts
5/16"-18x7/8
– Press the Door Control push bar. 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 5 cm of trolley travel.

3. Connect the door arm to the trolley:

• 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
Correct Angle
28
INCORRECT
Straight
Door Arm
Curved
Door
Arm
Ring
Fastener
Nuts
Lock
5/16"-18
Washers
5/16"
Outer Trolley
Door with
Backward Slant (Incorrect)
Curved
Door
Arm
Curved
Door Arm