Planning - Chamberlain 1425E Owner's Manual

Planning

Identify the type and height of your garage door. Survey
your garage area to see if any of the conditions below
apply to your installation. Additional materials may be
required. You may find it helpful to refer back to this page
and the accompanying illustrations as you proceed with
the installation of your opener.
Depending on your requirements, there are several
installation steps which may call for materials or hardware
not included in the carton.
• Installation Step 1 – Look at the wall or ceiling above the
garage door. The header bracket must be securely
fastened to structural supports.
• Installation Step 5 – Do you have a finished ceiling in
your garage? If so, a support bracket and additional
fastening hardware may be required.
• Do you have an access door in addition to the garage
door? If not, Model 1702E Outside Quick Release is
required. See Accessories page.
• Look at the garage door where it meets the floor. Any
gap between the floor and the bottom of the door must
not exceed 6 mm. Otherwise, the safety reversal system
may not work properly. See Adjustment Step 3. Floor or
door should be repaired.
SECTIONAL DOOR INSTALLATION
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with
glass panels, etc.). See page 25 for details.
Header Wall
Safety Reversing Sensor
Optional Accessory)
Torsion
Spring
Vertical
Centerline of
Garage Door
Safety Reversing Sensor
Gap between floor
(Optional Accessory)
and bottom of door
must not exceed 6 mm.
SECTIONAL DOOR INSTALLATIONS
• Do you have a steel, aluminum, fiberglass or glass panel
door? If so, horizontal and vertical reinforce ment is
required (Installation Step 10).
• The opener should be installed above the center of the
door. If there is a torsion spring or center bearing plate
in the way of the header bracket, it may be installed
within 1.2 m to the left or right of the door center. See
Installation Steps 1 and 10.
FINISHED CEILING
Support bracket &
fastening hardware
is required.
See page 21.
Slack in chain tension
is normal when
garage door is closed
Extension
Spring
OR
Access
Door
Wall-
mounted
Door
Control
4
Motor unit
Header Cable Pulley
Bracket Bracket
Garage
Door
Spring
Straight
Door
Arm
Curved
Door
Header
Arm
Wall
Door Bracket
Garage
Door
CLOSED POSITION
T-rail
Trolley
Chain
Emergency
Release
Rope & Handle