The Chamberlain Group, Inc.
A DUCHOSSOIS ENTERPRISE
845 Larch Avenue, Elmhurst, Illinois 60126
©
As of date of
manufacture, meets
all ANSI/UL 325
Safety Standards
and requirements
®
for residential and
commercial applications.
OWNER'S MANUAL
MODEL ATS 211
COMMERCIAL DOOR OPENER
For Residential and Light Duty Commercial Use
Install on Sectional Doors Only
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Includes Lift-Master
TM
"Protector System"
Please read this manual and the enclosed safety materials carefully!
Fasten the manual near the garage door after installation.
Periodic checks and adjustment of the opener are required to ensure safe operation.
The model number label is located on the operator cover.
You'll Need Tools
During assembly, installation and adjustment of the opener, instructions will call for hand tools shown below.
Pencil
Carpenter's
Level
Hack Saw
2
1
Tape Measure
Wire Cutters
Claw Hammer
Drill
3/16", 5/16" and
5/32" Drill Bits
Pliers
Adjustable End Wrench
Stepladder
Screwdriver
1/2" and 7/16" Sockets
and Wrench
WARNING
CAUTION
To avoid damage to the garage door and
opener, disable locks before installing and
operating the opener. Use a wood screw or nail
to hold locks in the "open" (unlocked)
position.
Ropes left on a garage door could cause
someone to become entangled and killed.
Remove all ropes connected to the door before
installing and operating the opener.
Operation at other than 120V 60 Hz will cause
opener malfunction and damage.
WARNING
This product is for use on sectional garage
doors only. Serious personal injury could
result from the use of this product on one-
piece garage doors.
Before you begin, complete the following test to make sure your door is balanced and is not sticking or
binding. Identify the type and height of your door, any special conditions that exist, and any additional
materials that may be required by referring to the lists on page 4.
• Lift the door about halfway as shown. Release the
door. It should stay in place, supported entirely by
its springs.
• Raise and lower the door to see if there is any
binding or sticking.
An unbalanced garage door might not reverse
when required and someone under the door
could be seriously injured or killed.
If your garage door binds, sticks or is out of
balance, call for professional garage door
service. Garage doors, door springs, cables,
pulleys, brackets and their hardware, are under
extreme tension and can cause serious injury or
death. Do not try to loosen, move or adjust them
yourself!
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Before you begin, survey your garage area. Do any of the following conditions apply to you?
FINISHED CEILING
Support bracket &
fastening hardware
is required.
See page 12.
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with glass panels, etc.).
See page 19 for details.
Slack in chain tension
is normal when
garage door is closed.
Header Wall
Extension Spring
OR
Torsion Spring
Access Door
Door Center
Safety
Reversing
Sensor
Floor must be level
across width of door
Safety Reversing Sensor
Based on your particular requirements, there are
several installation steps which might call for
materials and/or hardware not included in the
carton.
Closed Position
Header Chain Pulley
Bracket
Bracket
Rail
Trolley
Chain
• Step 1, page 8 - Look at the wall or ceiling above
the garage door. The header bracket must be
securely fastened to structural supports.
Garage
Door
Spring
• Step 5, page 12 - Do you have a finished ceiling in
your garage? If so, a support bracket and
additional fastening hardware may be required.
Manual
Release
Rope & Handle
Straight
Door
Arm
• Safety reversing sensor, page 16 - Depending
upon garage construction, wood blocks may need
to be fastened to mounting locations before
sensors are installed.
Curved
Door
Arm
Header
Wall
Door Bracket
• Step 10, page 17 - Alternate floor mounting of the
safety reversing sensor will require hardware not
provided.
Garage
Door
• Step 11, page 19 - Do you have a steel, aluminum,
fiberglass or glass panel door? If so, horizontal
and vertical reinforcement is required.
• The opener can be installed within 2 feet to the left or
right of the door center if there is a torsion spring or
center bearing plate in the way of the header bracket
or door bracket area. If your door has extension
springs, the opener must be installed in the center of
the door. See pages 8 and 19.
• Look at the garage door where it meets the floor. It
must close on the floor all the way across. Other-
wise, the safety reverse system may not work
properly. See page 23. Floor or door should be
repaired.
Do you have an access door in addition to the garage
door? If not, Model 1702 Outside Quick Release is
required. See page 30.
• If your door is more than 7 feet high, see longer
rails available on page 30.
You may find it helpful to refer back to this page as
you proceed with the installation of your opener.
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