Mounting The Power Head; Door Bracket Installation - Allstar CHALLENGER AC9300 Installation And Owner's Manual

STEP 4:
Mount Power Head to Ceiling: Since there is such variety in ceiling structures, all the mounting possibilities for the Power
Unit cannot be illustrated here. The main concern is mounting the Power Unit securely to the ceiling joists for operational strength,
rigidity and safety. Although there are a series of mounting slots provided on the power unit, try to secure the mounting straps in
the slots closest to the front. Mounting
may usually be accomplished
standard 1-1/4" perforated steel angle
available at most hardware stores. If in
doubt about location of, and attachment to,
ceiling joists, a carpenter should be
contacted to provide assistance. A cross
brace will be necessary if power head is
mounted 8" or more from the ceiling.
STEP 5:
Return to the Rail/Wall
Mounting Bracket and securely tighten
the bolt and nut that connect the Rail Front
Idler bracket and the Wall Mounting
Bracket. Take care not to over tighten the
nut; tighten only until the end of the bolt is
(See Step 2).
Mounting The Power Head End of
Opener
STEP 6: Align the center of opener tracks
with the center line previously marked on the
top section of the garage door to ensure rail
will be parallel with the direction of door
travel.
Use supplied hangers from the ceiling beams
to hang the opener at the power head end (be
sure to locate and mount to the solid structural
beams, as illustrated). Predrill with 3/16" drill
bit and use supplied 1/4" x 1-1/2" lag screws
to ensure a rigid mount.
NOTE: Hanging brackets should be at an
angle to provide rigid support. If hangers have no angle or if you use longer hangers, cross brace the
hangers to eliminate the possibility of sway during operation of the opener.
Fiberglass, aluminum or lightweight steel garage
doors will require reinforcement before installation of
the door mounting bracket
WARNING
manufacturer for a reinforcement kit or instructions.
STEP 7: Door Bracket Installation
NOTE: If the door is of light construction it may be necessary to reinforce the
center stile with steel angle or wood to prevent damage to the door if it
encounters an obstruction on closing.
Mount the door bracket using two 1/4"-20 x 2" carriage bolts and 1/4" nuts
(supplied), on center line of door with the middle hole in line with the top
rollers.
If your door comes equipped with a strut
mounted opener bracket, proceed to Step 8.
C:
using
SECTIONAL DOORS AND ONE-
PIECE DOORS WITH TRACKS
ALLOW 2" BETWEEN
TOP OF DOOR AND RAIL
DOOR FULLY
OPEN
Structural
Beams
Opener
Power Head
Contact your door
110051-1
INSTALLING THE OPERATOR
110050-2
Cut and bend
Hangers to fit
9
ONE PIECE DOORS
WITHOUT TRACKS
ALLOW 2" BETWEEN
HIGH ARC
TOP OF
DOOR IN
HIGH ARC
POSITION
For finished ceilings, or if
structural beams are out of
position for mounting use a
third mounting angle (not
included) making sure it is
securely mounted to beams.
Top Roller
Guideline
Reinforce Door
Vertically and
Horizontally
Door Center Line
Top Roller
Guideline
110051-2
104373
Mounting
Bracket