Chamberlain 248739 garage door opener

User Manual - Page 13

For 248739.

PDF File Manual, 44 pages, Download pdf file

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INSTALLATION 2
lnsta// the HeaderBracket
Youcanattachthe headerbracketeithertothewailabove
the garagedoor,ortotheceiling.Followtheinstructions
whichwill workbestforyourparticularrequirements,
Donotinstall theheaderbracketoverdrywall. If
installing intomasonry,useconcrete
anchors(notprovided).
WALLHEADERBRACKETINSTALLATION
Centerthe bracket on thevertical centerline with the
bottom edgeof the bracket on the horizontal Iine as
shown (with the arrow pointing toward the ceiling).
Markthe vertical set of bracket holes. Drill 3/t6 °pilot
holesandfasten the bracket securely to astructural
support with the hardware provided.
HARDWARESHOWNACTUALSIZE
Lag Screw
5/16°-9xt-5/8"
CEILINGHEADERBRACKETINSTALLATION
Extendthe vertical centerline onto the ceiIing as shown.
Centerthe bracket on thevertical mark, no more than
6°(15 cm) from thewalt. Make sure the arrow is
pointing away from the waft.The bracket can be
mounted flush against theceiIing when clearance
is minimal
- Markthe side holes, Drill 3/16" pilot holesand fasten
bracket securelyto astructural support with the
hardware provided,
Wall Mount
Optional
Mounting Holes
2x4
Structura_
Support
I
Horizontal /
Line/ ./
i
HighestPointof
GarageDoorTravel
Header
Bracket
6° (15 cm) M_
DoOr
Spring
Vertica}
Centerline
of Garage
Door
LagScrews
5/16"-9xl-5/8"
Door Spring
-- 6arago Door--
Vertical
Centertine
of GarageDoor
-- FinishedCeiling--
VerticalCenteriine
of GarageDoer
LagScrews
5/16"-9xl -5/8"
- Header Wall --
13
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