Prepare Your Garage Door - Chamberlain RJO20C Manual

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.
To watch a video, go to https://tinyurl.com/yadaxgzk
____ 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.
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