Install The Protector System; Setting Auto Close; Installing And Adjusting; Safety First - Chamberlain Merlin Professional MR850 Installation And Operating Instructions Manual

Whilst Chamberlain have engineered safety features into your garage door opener, we urge you to consider fitting
IR Beams to your new garage door opener. In many countries these devices are compulsory to assist in
preventing serious injury or property damage. For your own peace of mind and the safety of others please install
this inexpensive safety device.
TM
Protector System
IR Beams must be installed
to detect a 100mm high
obstacle at any point along
Red LED
MUST BE ON
IR Beam

SAFETY FIRST!

180s
0s
50s
the floor.
IR Beam
A. Strip wire
(11 mm)
7/16" (11 mm)
B. Twist like coloured
wires together
C. To insert or release
wire, push in tab with
screwdriver tip
Grey White
Red
Quick-Connect Terminals
Red LED
MUST BE ON