Force Adjustments - Chamberlain 3500 - 1/2HP Series Owner's Manual

Adjustment Step 2
Adjust the Force
Force adjustment controls are located on the back
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
1
7
3
5
KG
Adjustment Label
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 30. 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
5
KG
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 30.
Back 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.
29
WARNING
Force
Adjustment
Controls
1 2 3
TO PROGRAM RECEIVER CODE
FOR EACH REMOTE CONTROL
1. Press and HOLD remote control
transmitter push button.
2. Press receiver code button. The opener
light will flash once.
9 1 9 1
3. Release transmnitter button. Opener
has learned code.
7 3 7 3
TO ERASE ALL RECEIVER CODES 5 5
1. Press and HOLD receiver code button. KG
KG
Green indicator light alongside will turn
ON.
This device complies WARNING: To reduce the risk of severe injury
with FCC Rules Part or death by entrapment, when adjusting either
2. When light turns OFF (about 6
the force or limits of travel controls ensure that
15. Operation of this
seconds) ALL codes are erased from the door reverses on a 1 inch object (or a 2 x 4
device is subject to the
opener memory.
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
including interference hauteur (ou un madrier de 2 x 4 de section, à
plat) posé sur le sol. Effectuer les reglages
that may cause
selon les procédures décrites dans la notice.
undesired operation.
PART NO: Nº DE PIÈCE:
DATE:
Sears Roebuck & Co. D.O.C. CERT. NO.
Sears Canada Inc., Toronto
Assembled in Mexico - Assemblé du Mexique
PAT. #RE29,525; 4,750,201; 4,806,930 Other Patents Pending. M.D.C. CERT. NO. 132C2105-1