Chamberlain HD920EV Manuale Utente

15

To avoid possible SERIOUS INJURY 
from a falling garage door opener, 
fasten it SECURELY to structural 
supports of the garage. Concrete 
anchors MUST be used if installing ANY 
brackets into masonry.

Finished Ceiling

Unfinished Ceiling

Lag Screw
5/16"-18x1-7/8"

Hex Bolt
5/16"-18x7/8"

Lock Washer
5/16"-18 

Nut 5/16"-18 

Make sure the garage door opener 
is aligned with the header bracket. 
Measure the distance from each 
side of the garage door opener to 
the support bracket.

Cut both pieces of the hanging 
bracket to required lengths.

On fi nished ceilings, use the 
lag screws (H10) to attach a 
support bracket (not provided) 
to the structural supports before 
installing the garage door opener.

Finished 
Ceiling

H10

(not provided)

H10

Attach the end of each hanging 
bracket to the support bracket with 
appropriate hardware 
(not provided).

Attach the garage door opener to 
the hanging brackets with the bolts 
(H15), lock washers (H21) and 
nuts (H20).

Remove the 2x4 and manually close 
the door. If the door hits the rail, 
raise the header bracket.

(not provided)

H15

H20

H21

Hanging the garage door opener will vary 
depending on your garage. Below are three 
example installations. Your installation 
may be different. For ALL installations the 
garage door opener MUST be connected 
to structural supports. The instructions 
illustrate one of the examples below.