Installation Instructions

1l
1 Bulb Model
2 Bulb Model
Belt Models Only
Clear Bag
1m
1k. Once proper tension has been established, hold turnbuckle in place with a 7/16” or adjustable wrench.
Tighten both tension nuts with a 7/16” wrench.
1l. Lower the drive sprocket over the spline shaft on top of the powerhead. Align rail strap and sprocket
support with holes in powerhead. Fully tighten 1/4”-14 x 5/8” self tapping screws. Do not overtighten.
1m. Install belt retainer using #6 x 3/8” self tapping screws.(Clear parts bag, Belt models only).
1k
Tighten Locknuts
against the Turnbuckle
Hold
Hold
!
ATTENTION!
CRITICAL STEP
2a. Determine “highest point of door travel”:
• Get on a ladder to the side of your garage
door.
• Have someone lift the door open slowly.
• As the door is raised, nd 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.
2b. With a tape measure, determine the
distance from the highest point of door
travel to the floor.
2c. Place a mark on the header at the highest
point of door travel, preferably at the
center of the door (measured side to side).
2d. Position the header bracket above the highest point of travel:
2-1/2" above highest point of door travel.
2e. Drill 5/32" pilot holes in header and secure bracket with 5/16" x 1-3/4" lag screws.
4a
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 oor
WARNING
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!
CAUTION
Header Bracket must be fastened to garage framing. DO NOT fasten to drywall, particle board, plaster, or
other such materials.
Door Centerline
Header
Bracket
5/16” x 1-3/4” Lag Screws
Highest point
of door travel
as door opens
Plus 2-1/2”
above highest
point of travel
HEADER
MOUNTING RAIL BRACKET
ON HEADER (ORANGE BAG)
2a.
Determine “highest point of door travel”:
M
ON
2a