Chamberlain ATSW User manual

Light-Duty Commercial/
Residential Trolley Operator
Model ATSW
• Please read this manual and the safety materials
carefully!
• Fasten the manual near the door after installation.
• The door WILL NOT CLOSE unless the Protector
System®is connected and properly aligned.
• Periodic checks of the operator are required to ensure
safe operation.
• The model number label is located on the left panel of
your operator.
• This door operator is ONLY compatible with myQ®and
Security+ 2.0®accessories.
• DO NOT exceed 8 complete cycles of door operation
per hour.
LiftMaster
300 Windsor Drive
Oak Brook, IL 60523
1 YEAR WARRANTY
Register your door operator to receive updates
and offers from LiftMaster
Take a photo of the camera icon
including the points ( ).
Send it in by texting the photo to 71403 (US) or
visit www.liftmaster.photo (Global)
SM
For additional information and resources, visit:
https://dealer.liftmaster.com/login

2
Contents
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Install the Door Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Install the Protector System®. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Repair Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3
myQ®Serial Number
Write down the following information for future reference:
myQ®Serial Number:
myQ®Serial Number
Product S/N
Product S/N:
Date of Purchase:
/ /
Safety Symbol and Signal Word Review
This door operator has been designed and tested to offer safe service provided it is installed, operated, maintained and
tested in strict accordance with the instructions and warnings contained in this manual.
When you see these Safety Symbols and Signal Words on the following pages, they will alert you to the possibility of
serious injury or death if you do not comply with the warnings that accompany them. The hazard may come from
something mechanical or from electric shock. Read the warnings carefully.
Mechanical
Electrical
When you see this Signal Word on the following pages, it will alert you to the possibility of damage to your door and/or
the door operator if you do not comply with the cautionary statements that accompany it. Read them carefully.
WARNING: This product can expose you to chemicals including lead, which are known to the State of
California to cause cancer or birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov
Unattended Operation
The Timer-to-Close (TTC) feature, the myQ Smartphone Control app, and myQ Garage Door and Gate Monitor are
examples of unattended close and are to be used ONLY with sectional doors. Any device or feature that allows the
door to close without being in the line of sight of the door is considered unattended close. The Timer-to-Close (TTC)
feature, the myQ Smartphone Control, and any other myQ devices are to be used ONLY with sectional doors.
Preparation

4
Before You Connect with Your Smartphone
Monitor and control your door from anywhere using the myQ app.
You will need:
lWi-Fi enabled smartphone, tablet or laptop
lBroadband Internet Connection
lWi-Fi signal in the building (2.4 Ghz, 802.11b/g/n required)
lPassword for your building's network (router's main account, not guest network)
Test the Wi-Fi Signal Strength
Make sure your mobile device is connected to your Wi-Fi network. Hold your mobile device in the place where your
door operator will be installed and check the Wi-Fi signal strength.
Check Signal Strength. If you see:
Wi-Fi signal is strong.
The door operator will
connect to your Wi-Fi
network.
Wi-Fi signal is weak.
The door operator may connect to
your Wi-Fi network. If not, try one of
the options below to improve the
Wi-Fi signal:
No Wi-Fi signal.
The door operator will not be able to
connect to your Wi-Fi network. Try
one of the options below to improve
the Wi-Fi signal:
• Move your router closer to the door operator
to minimize interference from walls and other
objects
• Buy a Wi-Fi range extender
For compatible router specifications and help, visit support.chamberlaingroup.com.
See page 30 to connect the door operator to a mobile device.
Check the Door
To prevent possible SERIOUSINJURYor DEATH:
lALWAYS call a trained door systems technician if door binds, sticks, or is out of balance. An unbalanced
door may NOT reverse when required.
lNEVER try to loosen, move or adjust door, door springs, cables, pulleys, brackets or their hardware, ALLof
which are under EXTREME tension.
lDisable ALLlocks and remove ALLropes connected to door BEFORE installation and operating door
operator to avoid entanglement.
lDO NOT install on a one-piece door if using devices or features providing unattended close. Unattended
devices and features are to be used ONLY with sectional doors.
To prevent damage to door and operator:
lALWAYS disable locks BEFORE installing and operating the operator.
lONLY operate door operator at 120V, 60Hz to avoid malfunction and damage.
Before you begin:
1. Disable locks and remove any ropes connected to the door.
2. Lift the door halfway up. Release the door. If balanced, it should stay in place,
supported entirely by its springs.
3. Raise and lower the door to check for binding or sticking. If your door binds,
sticks, or is out of balance, call a trained door systems technician.
4. Check the seal on the bottom of the door. Any gap between the floor and the
bottomof the door must not exceed 1/4 inch (6 mm). Otherwise, the safety
reversal system may not work properly.
5. The operator should be installed above the center of the door. If there is a
torsion spring or center bearing plate in the way of the header bracket, it may be
installed within 4feet (1.2 m) to the left or right of the door center. See page 10.
Torsion
Spring
Extension
Spring
OR
Preparation

5
Specifications
Volts 120VAC, 60 Hz
Current 6A
Rated load 600in lbs/sec.
Maximum door height 14 ft. (4.27m)
Maximum door size 16 ft. Wide x 14 ft. High (4.87mx 4.27m)
(not to exceed 224 sq. ft.)
Tools Needed
3/16
5/32
5/16
7/16
1/2
5/8
9/16
1/4
7/16
Preparation

6
Carton Inventory
Accessories will vary depending on the door operator model purchased. Depending on your specific model, other
accessories may be included with your door operator. The instructions for these accessories will be attached to the
accessory and are not included in this manual. The images throughout this manual are for reference and your
product may look different.
A. Header bracket
B. Pulley and bracket
C. Door bracket
D. Curved door arm
E. Straight door arm
F. Trolley (provided separately from the carton)
G. Emergency release rope and handle
H. Rail (provided separately from the carton)
I. Door operator
J. Chain spreader
K. Chassis support bracket
L. Chain (provided separately from the carton)
M. Door control
N. White and red/white wire
O. The Protector System®
Safety reversing sensors with 2-conductor white and white/black bell wire attached: sending sensor (1),
receiving sensor (1), safety sensor brackets (4), and "C" wraps (2)
P. Safety labels and literature
Q. Rail grease
Security+ 2.0®Accessories
883LMW
Push Button Door Control
Chassis Support Bracket Hardware ChainSpreaderHardware
Screw #8-32 x 3/8" (2) Screw #8-32 x 3/8" (2)
Hex Bolts 1/4"-20 x 5/8" (2) Rail Hardware
Lock Washers (2) Washered Bolts and Lock Washer (mounted in the top of
the door operator)
Washered Bolt 5/16"-18 x 1/2" (2)
Installation
Hex Bolt 5/16"-18 x 7/8" (4) Self-Threading Screw 1/4"-14 x 5/8" (2)
Lag Screw 5/16"-9 x 1-5/8" (2) Ring Fastener (3)
Lag Screw 5/16"-18 x 1-5/8" (2) Carriage Bolt 1/4"-20 x 1/2" (2)
Clevis Pin 5/16" x 2-3/4" (1) Wing Nut 1/4"-20 (2)
Clevis Pin 5/16" x 1-1/4" (1) Hex Bolt 1/4"-20 x 5/8" (2)
Clevis Pin 5/16" x 1" (1) Lock Nut 1/4"-20 (2)
Nut 5/16"-18 (4) Lag Screw 1/4" x 1-1/2" (4)
Lock Washer 5/16"-16 (4)
Door Control Hardware
Screw 6AB x 1" (2) Drywall Anchors (2)
Screw 6-32 x 1" (2)
AB
C
K
J
I
P
DE
F
H
G
L
M
N
Q
O
Not
Provided Not
Provided
Preparation

7
Assembly
1 Attach the Rail to the Operator
To avoid SERIOUS damage to door operator, use ONLY those bolts/fasteners mounted in the top of the operator.
NOTE: ONLY use the bolts removed from the door operator. Place the door operator on the packing material to
prevent scratching.
1. Remove bolt and lock nut from the top of the operator.
2. Align the rail and the styrofoam over the sprocket. Cut the tape from the rail, chain, and styrofoam.
3. Fasten the rail with the previously removed washered bolt and lock nut.
4. Position the chain around the operator sprocket.
5. Attach the chain spreader to the operator with screws.
6. Guide the chain around the chain spreader, to engage the sprocket.
Washered Bolt
5/16"-18x1/2"
(Mounted in the garage
door opener)
HARDWARE
Lock Nut
(Mounted in the
garage door opener)
Lock
Nut
Washered Bolt
5/16"-18x1/2"
Chain Spreader
Hex Screws 8-32x7/16"

8
Assembly
2 Attach the Chassis Support Bracket
To avoid possible SERIOUS INJURY to finger from moving door operator:
lALWAYS keep hand clear of sprocket while operating operator.
lSecurely attach sprocket cover BEFORE operating.
1. Position the chassis support bracket on the unit.
2. Attach the bracket to the rail with 1/4"-20 x 5/8" hex bolts and lock washers. Do not overtighten.
3. Attach the bracket to the operator by inserting a 5/16"-18 x 1/2" washered screw through a hole in each
side flange and a matching hole in the bracket. Complete the connection by inserting the #8-32 x 3/8" screw
through the back flange and the hole in rail support.
HARDWARE
Washered Bolt
5/16"-18x1/2"
Screw
#8-32x3/8"
Washered Bolt
5/16"-18x1/2"
Screw
#8-32x3/8"
Hex Bolt 1/4"-20x5/8"
Lock
Washer
3 Tighten the Chain
1. Loosen the inner nut and lock washer on the trolley threaded shaft.
2. Tighten the outer nut until the chain is a 1/2 inch above the base of the rail at the midpoint of the rail.
3. Re-tighten the inner nut.
Slack in the chain is normal when the door is closed. No readjustment is necessary.
Sprocket noise can result if the chain is too loose. During future maintenance, ALWAYS pull the emergency release
handle to disconnect the trolley before adjusting the chain.
1/2" (13 mm)

9
Installation
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
1. READ AND FOLLOW ALL INSTALLATION WARNINGS AND INSTRUCTIONS.
2. Install door operator ONLY on properly balanced and lubricated door. An improperly balanced door may NOT
reverse when required and could result in SEVERE INJURY or DEATH.
3. ALL repairs to cables, spring assemblies and other hardware MUST be made by a trained door systems
technician BEFORE installing operator.
4. Disable ALL locks and remove ALL ropes connected to door BEFORE installing operator to avoid
entanglement.
5. Where possible, install the door operator 7 feet (2.13 m) or more above the floor.
6. Mount the emergency release within reach, but at least 6 feet (1.83m) above the floor and avoiding contact
with vehicles to avoid accidental release.
7. NEVER connect door operator to power source until instructed to do so.
8. NEVER wear watches, rings or loose clothing while installing or servicing operator. They could be caught in
door or operator mechanisms.
9. Install wall-mounted door control:
lwithin sight of the door.
lout of reach of small children at a minimum height of 5feet (1.5m) above floors, landings, steps or any
other adjacent walking surface.
laway from ALL moving parts of the door.
10. Place entrapment warning label on wall next to door control.
11. Place emergency release/safety reverse test label in plain view on inside of door.
12. Upon completion of installation, test safety reversal system. Door MUST reverse on contact with a 1-1/2"
(3.8cm) high object (or a 2x4 laid flat) on the floor.
13. To avoid SERIOUS PERSONAL INJURY or DEATH from electrocution, disconnect ALL electric power
BEFORE performing ANY service or maintenance.
14. DO NOT install on a one-piece door if using devices or features providing unattended close. Unattended
devices and features are to be used ONLY with sectional doors.

10
Installation
1 Determine the Header Bracket Location
To prevent possible SERIOUS INJURY or DEATH:
lHeader bracket MUST be RIGIDLY fastened to structural support on header wall or ceiling, otherwise door
might NOT reverse when required. DO NOT install header bracket over drywall.
lConcrete anchors MUST be used if mounting header bracket or 2x4 into masonry.
lNEVER try to loosen, move or adjust door, springs, cables, pulleys, brackets, or their hardware, ALL of
which are under EXTREME tension.
lALWAYS call a trained door systems technician if door binds, sticks, or is out of balance. An unbalanced
door might NOT reverse when required.
lDO NOT enable the Timer-to-Close functionality if operating either one-piece or swinging doors. To be
enabled ONLY when operating a sectional door.
Close the door and mark the inside vertical centerline of the door.
Extend the line onto the header wall above the door. You can fasten the header bracket within 4 feet (1.22 m) of the left
or right of the door center only if a torsion spring or center bearing plate is in the way; or you can attach it to the ceiling
when clearance is minimal. (It may be mounted on the wall upside down if necessary, to gain approximately 1/2" (1
cm). If you need to install the header bracket on a 2x4 (on wall or ceiling), use lag screws (not provided) to securely
fasten the 2x4 to structural supports.
Open your door to the highest point of travel as shown. Draw an intersecting horizontal line on the header wall 2" (5
cm) above the high point. This height will provide travel clearance for the top edge of the door.
NOTE: If the total number of inches exceeds the height available in your building, use the maximum height possible, or
refer to page 11 for ceiling installation.
Header Wall
Unfinished
Ceiling
Vertical Centerline
of Garage Door
2x4
2x4
Structural
Supports
Level
(Optional)
OPTIONAL
CEILING
MOUNT FOR
HEADER
BRACKET
Sectional door with curved track
Header Wall
Track
2" (5 cm)
Highest Point
of Travel
Door