Chamberlain 2500 - Manual (Page 13)

13
INSTALLATION STEP 5
Hang the Opener
Three representative installations are shown. Yours
may be different. Hanging brackets should be
angled, Figure 1, to provide rigid support. On
finished ceilings, Figure 2, attach a sturdy metal
bracket to structural supports before installing the
opener. This bracket and fastening hardware are not
provided.
Existing brackets from a previous installation may be
fastened to the sides of the motor unit as in Figures
1 and 2, or to the mounting tabs as shown in
Figure 3. Then continue with step 5 below.
1. Remove from packaging. Measure the distance
from each side of the motor unit to the structural
support.
2. Cut both pieces of the hanging bracket to required
lengths.
3. Drill 3/16" pilot holes in the structural supports.
4. Attach one end of each bracket to a support with
5/16"-18x1-7/8" lag screws.
5. Fasten the opener to the hanging brackets with
5/16"-18x7/8" hex bolts, lock washers and nuts.
6. Check to make sure the rail is centered over the
door (or in line with the header bracket if the
bracket is not centered above the door).
7. Remove the 2x4. Operate the door manually. If
the door hits the rail, raise the header bracket.
8. Grease the top and underside of the rail surface
where the trolley slides with
rail grease.
Lag Screw 5/16"-18x1-7/8"
Hex Bolt
5/16"-18x7/8"
Nut 5/16"-18 Lock Washer 5/16"
HARDWARE SHOWN ACTUAL SIZE
Measure
Distance
Lag Screws
5/16"- 18x1-7/8"
Bracket
(Not Provided)
Lag Screws
5/16"-18x1-7/8"
(Not Provided)
Hex Bolts
5/16"-18x7/8"
Lock Washers 5/16"
Nuts 5/16"-18
— FINISHED CEILING —
Hex Bolts
5/16"-18x7/8"
Lock Washers 5/16"
Nuts 5/16"-18
Hex Bolts
5/16"-18x7/8"
Lock Washers 5/16"
Nuts 5/16"-18
Hidden
Support
Structural
Supports
Preferred range of
bracket placement
Preferred range of
bracket placement
Utilizing existing top mount installation
Existing Brackets
Bracket
(Provided)
Figure 1
Figure 2
Figure 3
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.
WARNING
CAUTION WARNING
WARNING