Force Adjustments - Chamberlain 1280 - 1/2 HP Owner's Manual

Adjustment Step 2
Adjust the Force
Force adjustment controls are located on the right
panel of the opener. Force adjustment settings
regulate the amount of power required to open and
close the door.
The door will stop in the up direction if anything
interferes with its travel. The door will reverse in the
down direction if anything interferes with its travel
(including binding or unbalanced doors).
If the forces are set too light, door travel may be
interrupted by nuisance reversals in the down
direction and stops in the up direction. Weather
conditions can affect the door movement, so
occasional adjustment may be needed.
The maximum force adjustment range is 260 degrees,
about 3/4 of a complete turn. Do not force controls
beyond that point. Turn force adjustment controls
with a screwdriver.
9
7
Test the DOWN (close) force
Grasp the door bottom when the door is about
halfway through DOWN (close) travel. The door
should reverse. (Reversal halfway through down
travel does not guarantee reversal on a one inch
obstruction. See page 26.) If the door is hard to
hold or doesn't reverse, decrease the DOWN (close)
force by turning the control counterclockwise.
Make 10 degree turn adjustments until the door
reverses normally. After each adjustment, run the
opener through a complete cycle.
Test the UP (open) force
Grasp the door bottom when the door is about
halfway through UP (open) travel. The door should
stop. If the door is hard to hold or doesn't stop,
decrease UP (open) force by turning the control
counterclockwise.
9
1
7
3 3
5 5
KG
KG
Force Adjustment Label
How and When to Adjust the Forces
Too much force on the door will interfere with the
proper operation of the safety reverse system.
The door might not reverse properly when
required and could seriously injure or kill
someone under it. Do not increase the force
beyond the minimum amount required to close
the door. Do not use the force adjustments to
compensate for a binding or sticking garage door.
Test the safety reverse system following all
adjustments to force levels. See page 26.
1
Right Panel
of Opener
Make 10 degree turn adjustments until the door stops
easily. After each adjustment, run the opener through
a complete travel cycle.
If the door doesn't open at least 5 feet
Increase UP (Open) force by turning the control
clockwise. Make 10 degree turn adjustments until
door opens completely. Re-adjust the UP limit if
necessary. After each adjustment, run the opener
through a complete travel cycle.
If the door reverses during the down (close) cycle
and the opener lights aren't flashing
Increase DOWN (close) force by turning the control
clockwise. Make 10 degree turn adjustments until the
door completes a close cycle. After each adjustment,
run the opener through a complete travel cycle. Do
not increase the force beyond the minimum
amount required to close the door.
25
WARNING
Force
Adjustment
Controls
1 2
9 1 9
7 3 7
5
KG
WARNING: To reduce the risk of severe injury
This device complies
or death by entrapment, when adjusting either
with FCC Rules Part
the force or limits of travel controls ensure that
15. Operation of this
the door reverses on a 1 inch object (or a 2 x 4
device is subject to the
board laid flat). See instructions for proper
following conditions:
adjustment procedure.
1. This device may
AVERTISSEMENT: Pour réduire les risques de
not cause harmful
blessures mortelles par happement, après tout
interference. 2. This réglage de la force de déclenchement ou des
device must accept seuils de fin de course s'assurer que le sens de
any interference la course s'inverse lorsque la porte entre en
that may be received, contact avec un object de 13 mm (1 po) de
hauteur (ou un madrier de 2 x 4 de section, à
including interference
plat) posé sur le sol. Effectuer les reglages
that may cause
selon les procédures décrites dans la notice.
undesired operation.
PART NO:
D.O.C. CERT. NO.
M.D.C. CERT. NO.
3
1
3
5
KG
Nº DE PIÈCE:
DATE:
132C2105-1