Chamberlain HD520EV User Manual

23
Installation
STEP 13 Install the Protector System
®
(continued)
OPTION B WALL INSTALLATION
If additional clearance is needed an extension bracket (notprovided) or wood blocks can be used. Make
sure each brackethas the same amount ofclearance so they will align correctly.
1. Position the sensor bracket against the wall with the curved arms facing the door. Make sure
there isenough clearance for the beam to be unobstructed. Mark holes.
2. Drill 3/16 inch pilot holes for each sensor bracket and attach the sensor brackets to the wall using
lag screws(not provided).
3. Slide the carriage bolt into the slot on each sensor.
4. Insertthe bolt through the hole in the sensor bracket and attach with the wing nut. The lenseson
both sensors should point toward each other. Make sure the lens is notobstructed by the sensor
bracket.
(Not provided)
No more than
6 inches (15 cm)
1
2
Inside
G
arage
Wall
(Not provided)
Lens
Carriage Bolt
1/4"-20x1/2"
Wing Nut
1/4"-20
3
4
OPTION C FLOOR INSTALLATION
Use an extension bracket (not provided) or wood block to raise the sensor bracket if needed.
1. Carefully measure the position of both sensor bracketsso they will be the same distance from the
wall and unobstructed.
2. Attach the sensor brackets to the floor using concrete anchors (not provided).
3. Slide the carriage bolt into the slot on each sensor.
4. Insertthe bolt through the hole in the sensor bracket and attach with the wing nut. The lenseson
both sensors should point toward each other. Make sure the lens is notobstructed by the sensor
bracket.
I
nsid
e
G
arage
Wa
l
l
(Not provided)
1 2
Carriage Bolt
1/4"-20x1/
2"
Wing Nut
1/4"-20
3
4

Chamberlain HD520EV Specifications

General

Brand	Chamberlain
Model	HD520EV
Category	Garage Door Opener
Language	English