Chamberlain 1270LMC 用户手册

1/4x1-1/2"

Lag Screw

#10-32x3/8"

Screw

1/4"-20

Lock Nut

#10x32

Lock Nut

Staples

1/4"-20x1/2"

Carriage Bolts

Mounting Bracket

With Square Holes

#10-32x3/8"

Screws

"C" Wrap

#10-32

Lock Nuts

Figures 2, 3 and 4 show recommended assembly of
bracket(s) and "C" wrap based on the 

wall install

ation of the sensors on each side of the garage door
as shown on page 17, or on the 

garage door tracks

themselves. 

Figures 5 and 6 are variations which may fit your
installation requirements better. Make sure the
wraps and brackets are aligned so the sensors
will face each other across the garage door.

• Fasten the "C" wraps to the mounting brackets

having square holes, using the hardware shown in
Figure 2.

• Discard slotted bracket. Drill 3/8" holes in each

track and fasten securely with hardware as shown
in Figure 3.

• Connect each assembly to a slotted bracket, using

the hardware shown in Figure 4. Note alignment
of brackets for left and right sides of the door.

• Finger tighten the lock nuts.

• Use bracket mounting holes as a template to locate

and drill (2) 3/16" diameter pilot holes on both sides
of the garage door, 4"-6" above the floor (but not
exceeding 6"). See warning on page 17.

• Attach bracket assemblies with 1/4"x1-1/2" 

lag screws as shown in Figure 4.

• Adjust right and left side bracket assemblies to the

same distance out from mounting surface. Make
sure all door hardware obstructions are cleared.
Tighten the nuts securely.

18

Inside

Garage

Wall

"C" Wrap

Mounting Bracket

with Square Holes

1/4"-20x1/2"

Carriage Bolts

1/4"-20 Lock Nuts

Drill 3/8"

Holes

Garage

Door Track

Mounting Bracket

with Slot

1/4"-20

Lock Nuts

1/4x1-1/2"

Lag Screws

1/4-20x1/2" Carriage Bolts

(with square shoulder)

Inside

Garage

Wall

"C" Wrap

Mounting Bracket

with Square Holes

"C" Wrap

Inside

Garage

Wall

Mounting Bracket

with Square Holes

Mounting Bracket

with Slot

Sensor

Garage

Floor

Indicator Light

Garage

Floor

Inside

Garage

Wall

Mounting Bracket

with Slot

Mounting Bracket

with Square Holes

"C" Wrap

Sensor

Indicator

Light

Attach with

concrete anchors

(not provided)