Assembly Procedures - Chamberlain LiftMaster 770E Mode D'emploi

en The Protector System™ - Safety Reversing Sensor Model 770E
Installation procedures are the same for sectional and one-piece doors.
Look at the label on the connector end of each case to identify thesensors.
The sending eye transmits an invisible light beam to the receiving eye. If an
obstruction breaks the light beam while the garage door is closing, the door
will stop and reverse to full open position.
The units can be installed on either side of the garage door (Figure 1) as
long as the sun never shines directly into the receiving eye lens, but the
brackets must be connected and fastened so that the sending and receiving
eyes face each other as shown in Figure 1.
The brackets must be securely fastened to a solid surface such as the studs
on either side of the door, or add a piece of wood at each location if instal-
ling in masonry construction.
The invisible light beam path must be unobstructed. No part of the garage
door (or door tracks, springs, hinges, rollers or other hardware) can interrupt
the beam while the door is closing. If it does, use a piece of wood to build
out each sensor mounting location to the minimum depth required for light
beam clearance.
Figures 2, 3 and 4 show recommended assembly of bracket(s) and „C" wrap based on the wall installation of the sensors on each side of the garage door shown
above, or on the garage door tracks themselves.
Figure 5 shows 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.
ALL Installations
Mounting Bracket
With Square Holes
#10-32
Lock Nuts
• Fasten the „C" wraps to the mounting brackets with square holes, using
the hardware shown.
Garage WALL Installation
1/4x1-1/2"
Lag Screws
Inside
Garage
Wall
Mounting Bracket
1/4"-20 with Slot
1/4"-20
Lock Nuts
• Connect each assembly to a slotted bracket, using the hardware shown.
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"
(4,8mm) diameter pilot holes on both sides of the garage door, 4"-6"
(100mm-150mm) above the floor (but not exceeding 6" (150mm).
• Attach bracket assemblies with 1/4"x1-1/2" lag screws as shown.
• 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.

ASSEMBLY PROCEDURES

Figure 2
„C" Wrap
#10-32x3/8"
Screws
Figure 3
1/4-20x1/2" Carriage Bolts
(with square shoulder)
„C" Wrap
Mounting Bracket
with Square Holes
To protect small children, install the Protector System™
no higher than 4"-6" (100mm-150mm) above the garage
floor. Disconnect power to the garage door opener befo-
re installing the Protector System™.
Sensor
Unit
Left Side Invisible Light
of Garage Beam Protection Area
Figure 1: Facing the door from inside the garage
Garage DOOR Track Installation
Inside
Garage
Garage
Door Track
Wall
Drill 3/8"
(9,5mm) Holes
1/4-20x1/2"
Carriage Bolts
• Discard slotted bracket. Drill 3/8" (9,5mm) holes in each track and fasten
securely with hardware as shown.
Alternate Wall Mount
Inside
Mounting
Garage
Bracket
Wall
with Slot
Garage
Floor
Inside
Garage
Wrap
Sensor
Unit
Right Side
of Garage
Figure 4
1/4"-20
Lock Nuts
Mounting Bracket
with Square Holes
„C" Shaped
Wrap
Figure 5
Mounting
Bracket with
Square Holes
„C" Wrap
Sensor
Indicator Light
Alternate Floor Mount
Indicator Light
Wall
Sensor
Mounting Bracket
with Square Holes
Mounting Bracket
with Slot
„C"
Attach with
concrete anchors
(not provided)