Chamberlain RJO20 RJO20 Owner s Manual - English - Page 5

Prepare your Garage Door - garage door opener

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Preparation (continued) To prevent possible SERIOUS INJURY or DEATH: • ALWAYS call a trained door systems technician if garage door binds, sticks, or is out of balance. An unbalanced garage door may NOT reverse when required. • NEVER try to loosen, move or adjust garage door, door springs, cables, pulleys, brackets or their hardware, ALL of which are under EXTREME tension. • Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing and operating garage door opener to avoid entanglement. To prevent damage to garage door and opener: • ALWAYS disable locks BEFORE installing and operating the opener. • ONLY operate garage door opener at 120 V, 60 Hz to avoid malfunction and damage. Prepare your Garage Door ____ 1. Uninstall previous garage door opener. ____ 2. Disable locks. ____ 3. Remove any ropes connected to the garage door. ____ 4. Check the seal on the bottom of the door. Any gap between the floor and the bottom of the door must not exceed 1/4 inch (6 mm). Otherwise, the safety reversal system may not work properly. Complete the test below to make sure the garage door is balanced and is not sticking or binding. ____ 1. Lift the door 3-4 feet off the ground. Release the door. If balanced, it should stay in place, supported entirely by its springs. ____ 2. Raise and lower the door to check for binding or sticking. If your door binds, sticks, or is out of balance, contact a trained door systems technician BEFORE you install this opener. 5

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5
Prepare your Garage Door
To prevent damage to garage door and opener:
•
ALWAYS disable locks BEFORE installing and operating the opener.
•
ONLY operate garage door opener at 120 V, 60 Hz to avoid malfunction and damage.
To prevent possible SERIOUS INJURY or DEATH:
•
ALWAYS call a trained door systems technician if garage door binds, sticks, or is out of balance. An unbalanced
garage door may NOT reverse when required.
•
NEVER try to loosen, move or adjust garage door, door springs, cables, pulleys, brackets or their hardware, ALL
of which are under EXTREME tension.
•
Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing and operating garage door
opener to avoid entanglement.
Preparation
(continued)
____ 1.
Uninstall previous garage door opener.
____ 2.
Disable locks.
____ 3.
Remove any ropes connected to the garage door.
____ 4.
Check the seal on the bottom of the door. Any gap between the floor and the bottom of the door must not
exceed 1/4 inch (6 mm). Otherwise, the safety reversal system may not work properly.
Complete the test below to make sure the garage door is balanced and is not
sticking or binding.
____ 1.
Lift the door 3-4 feet off the ground. Release the door. If balanced,
it
should stay in place, supported entirely by its springs.
____ 2.
Raise and lower the door to check for binding or sticking.
If your door binds, sticks, or is out of balance, contact a trained door systems technician
BEFORE you install this opener.