Chamberlain 870CB Series User Manual

Safety Reversing Sensor Model Series 870CB
WARNING
Without a properly working safety reversing
sensor, persons (particularly children) could
be killed by a closing garage door. Read and
follow all instructions.
To protect small children, install the Protector
System so that the beam will be no higher
CAUTION
than 4"-6" above the garage floor.
Disconnect power to the garage door opener
before installing the Protector System.
Be sure power to the opener is disconnected.
The sending eye transmits an invisible light beam to
the receiving eye.The units can be installed on either
side of the garage door as long as the sun never
shines directly into the receiving eye lens.
Look at the label on the connector end of each case
to identify the sensors.
The brackets must be connected and fastened so that
the sending and receiving eyes face each other as
shown in Figure 1.
If an obstruction breaks the light beam while the
garage door is closing, the door will stop and reverse
to full open position; and the opener lights will flash
for 5 seconds.
Sensor Beam
4-6" max.
above floor
The Protector System
Invisible Light Beam
Protection Area
FIGURE 1
Facing the door from inside the garage
™
WARNING
Installation procedures are the
same for sectional and one-
piece doors.
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 installing 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.
1
Sensor Beam
4-6" max.
above floor