LiftMaster 8550C Mode D'emploi page 20

Install the Protector System
OPTION B
PRE-WIRED INSTALLATION
2.1B
Cut the end of the safety
reversing sensor wire, making
sure there is enough wire to
reach the pre-installed wires
from the wall.
2.4B
At the garage door opener, strip 7/16 inch (11 mm) of insulation from each end of the wires previously chosen for the
safety reversing sensors. Twist the like-colored wires together.
®
2.2B
Separate the safety reversing sensor wires and strip 7/16 inch (11 mm) of
insulation from each end. Choose two of the pre-installed wires and strip 7/16
inch (11 mm) of insulation from each end. Make sure that you choose the
same color pre-installed wires for each sensor.
Safety reversing sensor wires
7/16"
(11 mm)
Yellow
Purple
7/16"
(11 mm)
2.3B
Pre-installed
wires
7/16"
(11 mm)
2.5B
20
Connect the pre-installed wires to the sensor wires with wire nuts
making sure the colors correspond for each sensor. For example,
the white wire would connect to the yellow wire and the white/black
wire would connect to the purple wire.
Not Provided
Yellow
(for example)
White
White/Black
Safety reversing sensor wires
Insert the wires connected to the white safety sensor wires to the
white terminal on the garage door opener. Insert the wires that are
connected to the white/black safety sensor wires to the grey
terminal on the garage door opener.
Yellow Purple
(for example) (for example)
To insert or remove the wires
from the terminal, push in the
tab with a screwdriver tip.
Pre-installed
wires
Purple
(for example)