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CAUTION
CAUTION
Fig. 2-5
Mounting bracket must be fastened to garage
framing. Do Not fasten to drywall, particle board,
plaster or other such materials.
Power Head
Channel/Rail
Assembly
6. Mount power head
(See Section 2 MOUNTING METHODS).
• Be sure channel/rail assembly and power head
are on door center line (Line “V”).
• Check the illustrations. Decide which mounting
method you will use. Materials for mounting are
not included.
• After power head is installed, remove
supporting material.
• Close door.
7. Install door braces (See CAUTION below).
Fig. 2-4
Header
Bracket
Spring
Header
Door
Support if
necessary to
clear spring
Center Line
Doors made of masonite, lightweight wood, fiber-
glass, and metal must be properly braced before
mounting Door Operator.
Contact door manufacturer or distributor for bracing
instructions.
Header bracket must be fastened to garage
framing. Do Not fasten to drywall, particle
board, plaster or other such materials.
3. Install header bracket (Fig. 2-3)
• Place bracket so:
– center hole is on line “V.”
– all holes are on line “H.”
• Mark hole positions “A” and “B.”
• Drill 5/32” holes at marked positions.
• Fasten bracket to header using two (2) 1/4” x 2”
lag screws
[
79
]
.
4. Attach channel/rail assembly to header
bracket (Fig. 2-4).
• Fasten header end of the channel/rail to the
Header bracket with cold header pin
[
82
]
.
• Install speed nut
[
81
]
.
• Support power head above floor, use:
– rope.
– ladder with cardboard packing.
– wood.
5. Level rail assembly and power head (Fig. 2-5).
• Raise and support power head above door tracks.
• Open door.
• Level channel/rail assembly and
support temporarily.
• Center channel/rail assembly and power head
on line “V” of door.
NOTE: The channel/rail assembly and power head
should be level if possible. If necessary, power
head may be mounted lower. However mounted,
moving door must not touch channel/rail assembly.
Fig. 2-3
Line “V”
Line “H”
“A”
“B”
Header Bracket
Lag Screws
Vertical
Centerline
of Door
13
CAUTION
T-rail shown. Channel
attachment is same.
[
79
]
[
81
]
[
82
]
Speed nut
Cold header
pin