Position The Opener - LiftMaster 1220EM FS2 Manual Del Usuario

INSTALLATION STEP 4

Position the Opener

Follow instructions which apply to your door type as
illustrated.
SECTIONAL DOOR OR ONE-PIECE DOOR WITH
TRACK
A 38 mm board is convenient for setting an ideal
door-to-T-rail distance.
• Raise the opener onto a stepladder. You will need
help at this point if the ladder is not tall enough.
• Open the door all the way and place a 38 mm
board on the top section beneath the T-rail.
• If the top section or panel hits the trolley when you
raise the door, pull down on the trolley release arm
to disconnect inner and outer sections. Slide the
outer trolley toward the motor unit. The trolley can
remain disconnected until Installation Step 11
is completed.
Trolley
Release Arm
ENGAGED
ONE-PIECE DOOR WITHOUT TRACK
• With the door fully open and parallel to the floor,
measure the distance from the floor to the top of
the door.
• Using a stepladder as a support, raise the top of
the opener to this height.
• The top of the door should be level with the top of
the motor unit. Do not position the opener more
than 5 cm above this point.
RELEASED
20
To prevent damage to garage door, rest garage door
opener rail on 38 mm board placed on top section of
door.
Header
Rail
Bracket
Door
Header
Bracket
Top of Door
38 mm
Board
38 mm
Board
Top of Motor Unit