Chamberlain MR850 Garage Door Opener User Manual


 
8
T
he force, as measured on the closing edge of the door,
should not exceed 400N (40kgf). If the closing force is
measured to more than 400N, the Protector System
T
M
(IR
Beams) must be installed (refer section 17).
Press the LRN button twice to place the opener into
f
orce adjustment mode. The indicator LED will flash
q
uickly.
Press the ACTIVATION button on the front of the
opener. The door will travel to the DOWN limit. Press
the ACTIVATION button again, the door will travel to
the UP limit. The indicator LED will stop flashing when
the force has been learned.
NOTE: The courtesy LEDs will go out after 2.5 min.
The door must travel through a complete cycle, UP and
DOWN, in order for the force to be set properly. If the
opener cannot open and close your door fully, inspect
your door to ensure that it is balanced properly and is
not sticking or binding.
professional
x 2
professional
LRN
Press twice
F
LASHING
orange LED
Activate
Wait: Door closed
A
ctivate
Wait: Door open
professional
Orange LED
will go out
Note: Courtesy LEDs will go out after 2.5 minutes
Once you have completed your installation and
successfully carried out the safety reverse system
test (outlined above), install the warning labels
provided with your opener as shown.
The risk of entrapment label must be installed
adjacent to the release handle at a height of less than
1.8m from the floor.
The WARNING label must be installed in a prominent
place near any fixed control.
Any fixed wall control or wireless door control must be
mounted at a height of no less than 1.5m out of the
reach of children.
Ensure the manual release instruction card is
attached to the rope as detailed in section 7.
Read the safety instructions (page 1) for further
details concerning safety.
14
FIXING WARNING LABELS
Operate the door in the down direction. The door must
reverse upon contact with the obstacle. If the door
stops on the obstacle, remove obstacle and repeat
limit and force setting (refer sections 13 and 14).
Repeat test of the safety reverse system.
15
40mm Test obstacle
40mm
16
TESTING THE SAFETY REVERSE SYSTEM
The safety reverse system test is important.
The garage door must reverse on contact
with a 40mm obstacle laid flat on the floor.
Failure to properly adjust the opener may result in
serious personal injury from a closing garage
door.
SETTING THE FORCE
STANDARD INSTALLATION COMPLETE