Chamberlain HD920EV Garage Door Opener User Manual


 
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3.1 Align the rail with the header
bracket.Insert the clevispin
(H12) through the holesin the
header bracket and rail.Secure
with the ring fastener (H19).
NOTE: Use the packing material asa
protective base for the garage door
opener.
H12
H19
HARDWARE
H12
Clevis Pin 5/16"x1-1/2"
H19
Ring Fastener
4 Position the garage door opener
To preventdamage to garage door,restgarage
door opener rail on 2x4 placed on top section of
door.
4.1 Remove the packing material and lift the
garage door opener onto aladder.
NOTE: A 2x4 isideal for setting the distance
between the rail and the door.Ifthe ladder is
not tall enough you will need help atthispoint.
4.2 Fullyopen the door and place a 2x4 (laid flat) under the rail.For one-piece doorswithout
tracks,lay the 2x4 on it'sside.
NOTE: Ifthe door hits the trolleywhen itisraised,pull the trolleyrelease arm down to
disconnectthe inner and outer trolley.Slide the outer trolley toward the garage door opener.
The trolleycan remain disconnected until instructed.
Connected Disconnected
One-piece
door
without
tracks
All other
door types
Installation
3 Attach the rail to the header bracket