Before you begin, survey your garage area to see whether any of the conditions below apply to your installation.
Horizontal and vertical reinforcement is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with glass panels, etc.).
See page 20 for details.
FINISHED CEILING Support bracket & fastening hardware is required.
See page 13.
Slack in chain tension
is normal when
garage door is closed.
Header Wall
— — —
Door Center
— — —
— —
Floor must be level across width of door
Safety Reversing Sensor
Extension Spring
OR
Torsion Spring
Access Door
Safety
Reversing
Sensor
Model 1702LMC Outside Quick Release is required if there is no access door.
Slack in chain tension is normal when garage door is closed
Header
Wall
FINISHED CEILING Support bracket
&fastening hardware may be required.
See page 13.
Access Door
|
| Safety | |
| Gap between floor | Reversing | |
| Sensor | ||
Safety | and bottom of door | ||
| |||
Reversing | must not exceed 1/4". |
| |
Sensor |
|
|
You may find it helpful to refer back to this page as you proceed with the installation of your opener.
Slack in chain tension
is normal when
garage door is closed. 
Access
Door
| Safety |
Safety | Floor must be level Reversing Sensor |
across width of door | |
Reversing Sensor |
|
4