Frantz 135F-1/4HP Owner's Manual - page 29
Adjustment Step 2
Adjust the Force
WARNING
Too much force on the door will
interfere with the proper operation of
the safety reverse system. See page
30. The door might not reverse properly
when required and could seriously
injure or kill someone under it. Do not
increase the force beyond what is
required to close the door. Do not use
the force adjustments to compensate
for a binding or sticking garage door..
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.
29
When to Adjust the Forces
Test the DOWN (close) force
Grasp the door bottom when the door is about
halfway through DOWN (close) travel. The door
should reverse. 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.
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 light isn’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.