Operation Safety Instructions; Important Safety Instructions; Care Of Your Opener; Maintenance Schedule - Chamberlain 1255GM Owner's Manual

IMPORTANT SAFETY INSTRUCTIONS

To reduce the risk of severe injury or death to persons:
1. READ AND FOLLOW ALL INSTRUCTIONS.
2. Do not permit children either to operate or to play with the opener. Keep remote control in a
location inaccessible to children.
3. Operate opener only when the door is in full view and free from any obstruction. Keep the door in
sight until it is completely closed. NO ONE SHOULD CROSS THE PATH OF THE MOVING DOOR.
4. Check safety reversal system monthly. See page 26. The garage door MUST reverse on contact
with a one-inch object (or a 2x4 board laid flat) placed on the floor. If an adjustment is made to
either the force or the limit of travel, both adjustments may be needed and the safety reversal
system must be checked. Failure to properly adjust the opener may result in severe injury or death.
5. If possible, use the manual release only when the door is in a closed position. Caution should be
taken whenever the disconnect cord is actuated with the door open. Weak or broken springs may
cause the door to fall rapidly, causing injury or death to persons.
6. KEEP GARAGE DOORS PROPERLY BALANCED. See page 3. An improperly balanced door may not
reverse when required and could result in severe injury or death . Repairs to cables, spring
assemblies and other hardware must be made by a professional garage door person.
7. Disconnect the electric power from the garage door opener before making any repairs or removing
the covers.
SAVE THESE INSTRUCTIONS.
8.
Limit and force adjustment controls
Limit Controls
INCREASE TRAVEL
DOWN UP
Adjustment Label
(Located on the left side panel)
Weather conditions may cause some minor
changes in door operation requiring some re-
adjustments, particularly during the first year
of operation.
Pages 24 and 25 refer to the limit and force
adjustments. Only a screwdriver is required. Follow
the instructions carefully.
Repeat the safety reverse test (page 26) after any
adjustment of limits or force.
Once a Month
Manually operate door. If it is unbalanced or
binding, call for professional garage door service.
Check to be sure door opens & closes fully.
Adjust limits and/or force if necessary. (See pages
24 and 25.)
Repeat the safety reverse test. Make any
necessary adjustments (See page 26).
WARNING

Care of Your Opener

Force Controls
9 9
1
7 7
3
5
KG
Adjustment Label
(Located on the back panel)

Maintenance Schedule

The remote control transmitter
The opener must learn the code of any new remote
control. Page 29 explains how to program your
receiver and how to erase all codes if required. Self
1
service of your receiver and remote control is not
3
recommended. If service is needed, call the toll-free
5
number listed on the back page.
KG
The remote control battery
The green battery test light will glow and the opener
will operate when the remote control is activated, as
long as there is adequate battery power.
If the test light is dim or off , replace the battery. Also
check the test light if transmission range decreases.
The 12 volt battery should produce power for at least
a year.
Dispose of your old battery properly.
Check chain tension. Disconnect trolley first.
Adjust if necessary. (See page 7.)
Oil door rollers, bearings and hinges. The opener
does not require additional lubrication. Do not
grease the door tracks.
27
WARNING
Twice a Year
Once a Year