Chamberlain HD520EV User Manual

25
Installation
STEP 14 Wire the Safety Reversing Sensors (continued)
OPTION B PRE-WIRED INSTALLATION
1. Cutthe end of the safetyreversing sensor wire, making sure there is enough wire to reach the
pre-installed wires from the wall.
2. Separate the safetyreversing sensor wires and strip 7/16 inch (11 mm) of insulation from each
end.Choose two ofthe 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.
3. Connectthe 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.
4. 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.Twistthe like-colored wires together.
5. Insertthe wires connected to the white safetysensor 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.
Safety reversing
sensor wires
Pre-installed
wires
White
White/Black
Yellow (for example)
Purple (for example)
Not Provided
Pre-installed wires
Safety reversing
sensor wires
7/16" (11 mm)
Yellow
Purple
1
3
4
7/16"
(11 mm)
2
WHITE WHITE
RED GREY
Purple
(for
example)
Yellow
(for example)
To insert or remove the wires from
the terminal, push in the tab with a
screwdriver tip.
5

Chamberlain HD520EV Specifications

General

Brand	Chamberlain
Model	HD520EV
Category	Garage Door Opener
Language	English