2a.
Flip the rail (a) over with the open side
facing down, and slide the shaft cou-
pler large hole over the screw drive.
2b.
align shaft coupler small hole with
the motor shaft
and slide screw drive and
coupler together onto the motor shaft.
note:
The motor shaft can be rotated
using a 3/8" wrench.
note
:
The large hole fits over the screw drive and
the smaller hole fits over the motor shaft.
note
:
The powerhead light/lens will face away
from the door.
2c.
Place powerhead bracket (H) on top
of rail with tongue of bracket (inset)
inserted into slot on the rail and plastic
bearing block.
2d.
Align powerhead bracket (H) holes with
holes on powerhead (I) and secure with
1/4"-14 - 5/8" tapered flange screws. DO
NOT over-tighten the screws.
note
:
The tongue of the powerhead bracket
must fit through the rail slot and into
the plastic bearing block.
Shaft coupler
A
I
2a
2b
A
Small
hole
Large
hole
Shaft coupler
Protective foam cushion
3a.
Determine “highest point of door travel”:
1. Get on a ladder to the side of your garage door.
2. Have someone lift the door open slowly.
3. As the door is raised, find the highest point where the door extends above the door tracks—that is
the highest point of door travel. For sectional doors this is typically where the top door roller exits the
curved portion of the track onto the horizontal section as the door is raised.
4. With a tape measure, determine the distance from the highest point of door travel to the floor.
3b.
Place a mark on the header at the highest point of door travel, preferably at the center of the door (mea-
sured side to side).
3c.
Position the header bracket above the highest point of travel:
· 2-1/2" above for sectional (hinged) doors.
· 6" above for one-piece (non-hinged) doors.
3d.
Drill 5/32" pilot holes in header and secure bracket with 5/16" x 1-3/4" lag screws.
Highest Point of door travel
typical Installation
WA R N I N G
Door springs are under high tension. If spring or shaft is in the way, measure above spring or shaft on the
garage door centerline and mark as location for header bracket.
do not atteMPt to MoVe, adJUst,
or reMoVe door sPrInG!
C AU T I O N
note
:
To prevent damage to motion
sensor (not on all models)
DO
NOT
remove foam cushion
from underside of
powerhead.
Slot
Header Bracket must be fastened to garage framing.
do not
fasten to drywall, particle board, plaster, or
other such materials.
3a
Highest point
of travel
Track
Header
bracket
Header
Sectional
door
2-1/2" above
highest point of door travel
Distance from the
highest point of
door travel to the floor
3b-d
5/16" x 1-3/4" Lag screw
Header
Door centerline
Door centerline
Header bracket
Highest point
of door travel as
door opens
Plus 2-1/2" for
sectional doors
Plus 6" for
one-piece doors
AttACh rAIl to poWerheAd
(BlUe BaG)
mountIng rAIl brACKet
on heAder
(oranGe BaG)
I
2c/2d
H
1/4"-14 - 3/4"
Tapered flange screw (x6)
A
Slot
