Installation Section - Chamberlain 1120E-1/2HP Owner's Manual

INSTALLATION STEP 1
Determine Header Bracket Location
Installation procedures vary according to garage
door types. Follow the instructions which apply to
your door.
IF YOUR IS A CANOPY OR DUAL-TRACK STYLE
GARAGE DOOR, A DOOR ARM CONVERSION KIT IS
REQUIRED. FOLLOW THE INSTALLATION
INSTRUCTIONS INCLUDED WITH THE REPLACEMENT
DOOR ARM.
SECTIONAL DOOR AND ONE-PIECE DOOR WITH TRACK)
– Header –
Wall
• Open your door to the highest
point of travel as shown. Draw
an intersecting horizontal line
on the header wall 5cm above
the high point. This height will
provide travel clearance for the
top edge of the door.
Proceed to Step 2, page 15.
Installation Section: Pages 13 – 22
Vertical
Guideline
– Finished Ceiling –
25mm
Board
Vertical
Guideline
Highest Point
with curved track
Garage Header
Exterior Wall
Track
One-piece door
with horizontal &
Track
vertical track
If the header bracket is not rigidly
fastened to a structural support on the
header wall or ceiling, the safety reverse
system may not work properly (see page
25). The door might not reverse when required, and
could cause serious injury or death.
The garage door springs, cables, pulleys, brackets
and their hardware are under extreme tension. Do
not attempt to loosen, move or adjust them
yourself. Serious personal injury or death could
result. Call for professional garage door service.
• Close the door and mark the inside
vertical centerline of the garage door.
• Extend the line onto the header wall
Structural
Supports
above the door.
Remember, you can fasten the header
bracket within 60cm of the left or right
of the door center only if a torsion
spring or center bearing plate is in the
way; or you can attach it to the ceiling
(refer to page 14) when clearance is
minimal. (It may be mounted on the
wall upside down if necessary, to gain
approximately 13mm.)
If you need to install the header bracket
on a 25mm board (on wall or ceiling),
use lag screws (not supplied) to securely
fasten the 25mm board to structural
supports as shown here and on page 14.
Ceiling
Header
Track
Wall
of Travel
Door
Door
Sectional door
Highest Point
of Travel
Door
13
Header
Wall
Highest Point
of Travel
Track
Jamb
Hardware
One-piece door with
horizontal track &
jamb hardware
Highest Point
of Travel
Header
Wall
Door
Canopy one-piece
Track
door with vertical track