9
NOTE: This accessory must be used for all
installations where the closing force as measured
on the bottom of the door is over 400 N (40 kgf).
After the opener has been installed and adjusted, the
Protector System™ accessory can be installed.
Instructions are included with this accessory.
The Protector System™ provides an additional
measure of safety against a small child or animal
being trapped under a garage door. It uses an infra-
red beam, which when broken by an obstruction,
causes a closing door to open and prevents an open
door from closing and is strongly recommended for
homeowners with young children.
NOTE: The opener will automatically detect the
Protector System
TM
when it is installed and
operating for 5 minutes (during this time the beams
must remain unobstructed). The opener will not
close unless the beams are aligned
.
Red LED
MUST BE ON
Red LED
MUST BE O
IR Beam
IR Beam
IR Beams must be installed
to detect a 100 mm high
obstacle at any point along
the floor.
16
SAFETY FIRST!
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.
Door may operate unexpectedly, therefore do not allow anything to stay in the path of the door.
INSTALL THE PROTECTOR SYSTEM™ (IR BEAMS) OPTIONAL ACCESSORY
Timer to close feature (TTC)
The Timer-to-close feature allows the door to automatically close after a specified time period. Prior to the door
closing, the garage door opener lights flash for 8 seconds before the door begins to close.
If the door encounters an obstruction while closing, the opener will make a second attempt to close the door. If
an obstruction occurs on the second attempt, the garage door opener will open, stop and WILL NOT close until
the obstruction has been cleared and the opener has been operated again.
NOTE: The Protector System
TM
MUST be installed and operating for 5 minutes to enable this feature.
Installing and adjusting:
• Turn the opener off
• Install the Protector System
TM
using the brackets, wires and instructions provided with the product. Twist the
two white (only) wires together and terminate them into the white (2) terminal. Twist the two white/black wires
together and terminate them into the grey (3) terminal.
• Turn the opener on
With the door at the down limit, press and hold DOWN
arrow until orange LED starts blinking.
Yellow LEARN button is used to cycle through the TTC settings:
1 x long blink = TTC OFF
1 x short blink = TTC 1 min
2 x short blink = TTC 5 min
3 x short blink = TTC 10 min
Press black rectangle button to set and exit.
Auto close is NOT recommended for households with young children.
1
2
V
D
C
MR850EVO ONLY
Up
Down
Yellow
Learn
Button
Black
Learn
Button