Position The Opener - Chamberlain Power Drive PD505D Owner's Manual

Chamberlain power drive pd505d garage door openers: user guide
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INSTALLATION STEP 5

Position the Opener

Follow instructions which apply to your door type as
illustrated.
SECTIONAL DOOR OR ONE-PIECE DOOR WITH
TRACK
A 2x4 laid flat is convenient for setting an ideal door-to-rail
distance.
• Remove foam packaging.
• 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 2x4 laid flat on
the top section beneath the 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 14 is completed.
ENGAGED
ONE-PIECE DOOR WITHOUT TRACK
A 2x4 on its side is convenient for setting an ideal
door-to-rail distance.
• Remove foam packaging.
• 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 2x4 on its
side on the top section of the door beneath the
rail.
• The top of the door should be level with the top of
the motor unit. Do not position the opener more
than 4" (10 cm) above this point.
Trolley
Release Arm
RELEASED
To prevent damage to garage door, rest garage door opener
rail on 2x4 placed on top section of door.
Top of Door
Door
Top of Door
2x4 is used to determine
the correct mounting height
from ceiling.
18
2x4 is used to determine
the correct mounting height
from ceiling.

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