Adjustments - Chamberlain HD920EV Manual

Adjustments

Without a properly installed safety reversal
system, persons (particularly small children)
could be SERIOUSLY INJURED or K LLED by a
closing garage door.
• Incorrect adjustment of garage door travel
limits will interfere with proper operation of
safety reversal system.
• After ANY adjustments are made, the safety
reversal system MUST be tested. Door
MUST reverse on contact with 1-1/2" (3.8
cm) high object (or 2x4 laid flat) on floor.
To prevent damage to vehicles, be sure fully
open door provides adequate clearance.
To watch a short instructional video on how to
program the travel on your new garage door
opener use your smartphone to read the QR Code
below:
INTRODUCTION
Your garage door opener is designed with
electronic controls to make setup and
adjustments easy. The adjustments allow you to
program where the door will stop in the open
(UP) and close (DOWN) position. The
electronic controls sense the amount of force
required to open and close the door. The force
is adjusted automatically when you program
the travel.
NOTE: If anything interferes with the door's
upward travel it will stop. If anything interferes
with the door's downward travel, it will reverse.
ONE-PIECE DOORS ONLY
When setting the UP travel for a one-piece
door ensure that the door does not slant
backwards when fully open (UP). If the door is
slanted backwards this will cause unnecessary
bucking and/or jerking when the door is
opening or closing.
PROGRAMMING BUTTONS
The programming buttons are located on the
left side panel of the garage door opener and
are used to program the travel.
UP (Open)
29
DOWN (Close)
CORRECT
INCORRECT
PROGRAMMING BUTTONS
UP Button
Adjustment
Button
DOWN Button