Tdc Trolley Installation; Install The Header Bracket - Chamberlain JDC Manual

TDC Trolley Installation

Install the Header Bracket

The trolley operator is generally mounted over the center of the door.
However, off center mounting may be required due to interfering structures
or location of the door stile / top section support. Typically, the operator
may be mounted up to 24 inches (60.1 cm) off center on torsion spring
doors. Extension springs require center mounting.
1. Close the door. Mark the center of the door with a vertical line, extend
the line onto the ceiling.
2. Open the door to the highest point of travel mark 4 inches (10.1 cm)
above the highest point of travel.
3. Center the header bracket on the vertical center line and the
horizontal line.
4. Drill the pilot holes for the header bracket.
5. Fasten the header bracket with appropriate hardware (not provided).
2
1
13
WARNING
To prevent possible SERIOUS
INJURY or DEATH:
• Header bracket MUST
be RIGIDLY fastened to
the structural support on
the header wall or ceiling,
otherwise the door might NOT
reverse when required. DO
NOT install the header bracket
over drywall.
• Concrete anchors MUST be
used if mounting the header
bracket or 2x4 into masonry.
• NEVER try to loosen, move or
adjust door, springs, cables,
pulleys, brackets, or their
hardware, ALL of which are
under EXTREME tension.
• ALWAYS call an Authorized
Service Technician if door
binds, sticks, or is out of
balance.
3
4"
4
5