Chamberlain 1245R garage door opener

User Manual - Page 17

For 1245R.

PDF File Manual, 40 pages, Download pdf file

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INSTALLATION STEP 5
Hang the Opener
Two 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.
1. 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"-18xl -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.
HARDWARE SHOWN ACTUAL SIZE
Hex Bolt
5/16"- 18x7/8" Nut 5/16"- 18 Lock Washer 5/16"
Toavoid possible SERIOUSINJURYfrom afalling
garagedoor opener,fasten it SECURELYto structural
supports of the garage.Concreteanchors MUST be used
if installing any bracketsinto masonry.
Figure1 __al
/ _/ Supports
,"14Lag Screws
--f-""'__,J 5/16"-18xl-7/8" _
Measure",
o,st
Bolt 5/16"-18x7/8" I "N Y I
Lock Washer 5/16" I _ I
Nut 5/16"-18 L I
Figure 2
Hidden
Support_ .-_
Bracket _ _ _ -
(Not Provided) __ _ _" _ _-_-_.
-_--__ - .... ::::: ..... -- FINISHED CEILING --
___-__ Lag Screws
-- (Not Provided)
__-" _ t,fL_-M-'_. Bolt 5/16"-18x7/8"
- _ _ _ "- /_] _" Lock Washer 5/16"
H " Nut 5/16"-18
Bolt 5/16"-18x7/8" _ \'_ /,_"V / -:_--
Lock Wa
17
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