Chamberlain 8355W User manual

Wi-Fi®Garage Door Openers
Belt Drive Models - 8355W 8355W-267
Chain Drive Models - 8360W 8360WL 8360WLB 8365W 8365W-267
FOR RESIDENTIAL USE ONLY •Please read this manual and the safety materials carefully!
•The door WILL NOT CLOSE unless the Protector System®is
connected and properly aligned.
•Periodic checks of the garage door opener are required to
ensure safe operation.
•This garage door opener is ONLY compatible with myQ®
and Security+ 2.0®accessories.
•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.
•Attach warning labels to the location indicated on label.
LiftMaster
300 Windsor Drive
Oak Brook, IL 60523

2
Table of Contents
Preparation 3
Carton Inventory: Models 8355W and 8355W-267 6
Carton Inventory: Models 8360W, 8360WL, and 8360WLB 7
Carton Inventory: Models 8365W and 8365W-267 8
Assembly 9
Models 8355W and 8355W-267 9
Models 8360W, 8360WL, 8360WLB, 8365W, and 8365W-267 11
Installation 12
Install the Door Control 20
Install the Protector System 22
Power 26
Adjustments 28
Battery Backup 31
Operation 33
Maintenance 42
Troubleshooting 43
Accessories 45
Warranty 46
Repair Parts 47
Models 8355W and 8355W-267 47
Models 8360W, 8360WL, and 8360WLB 49
Models 8365W and 8365W-267 51

3
Preparation
myQ®Serial Number
Write down the following information for future reference:
myQ®Serial Number:
myQ®Serial Number Product Serial Number
Product Serial Number:
Date of Purchase:
/ /
Safety Symbol and Signal Word Review
This garage door opener 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 garage door and/or the garage door opener 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®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®App, and any other myQ®devices are to be used
ONLY with sectional doors.

4
Preparation
Before You Connect with Your Smartphone
Monitor and control your garage door from anywhere using the myQ®App.
You will need:
• Wi-Fi enabled smartphone, tablet or laptop
• Broadband Internet Connection
•Wi-Fi signal in the garage (2.4 GHz, 802.11b/g/n required)
• Password for your home 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 garage door opener will be installed and check the Wi-Fi signal strength.
Check Signal Strength. If you see:
Wi-Fi signal is strong.
The garage door opener will
connect to your Wi-Fi network.
Wi-Fi signal is weak.
The garage door opener 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 garage door opener 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 garage door opener 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 35 to connect the garage door opener to a mobile device.
Check the Door
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 installation
and operating garage door opener to avoid entanglement.
• 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.
To prevent damage to garage door and opener:
• ALWAYS disable locks BEFORE installing and operating the opener.
• ONLY operate garage door opener at 120V, 60Hz to avoid malfunction and damage.
Before you begin:
1. Disable locks and remove any ropes connected to the garage 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 bottom of the door must not exceed 1/4" (6 mm). Otherwise, the
safety reversal system may not work properly.
5. The opener 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 13.
Torsion
Spring
Extension
Spring
OR

5
Preparation
Tools Needed
3/16
5/32
5/16
7/16
1/2
5/8
9/16
1/4
7/16

6
Preparation
Carton Inventory: Models 8355W and 8355W-267
Accessories will vary depending on the garage door opener model purchased. Depending on your
specific model, other accessories may be included with your garage door opener. 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
G. Emergency release rope and handle
H. Rail
I. Garage door opener
J. Sprocket cover with hex screws
K. Belt
L. Door control
M. White and red/white wire
N. The Protector System®
Safety reversing sensors with white and white/black wire attached: Sending senor
(1), receiving sensor (1), and safety sensor brackets (2)
O. Safety labels and literature
P. Rail grease
SECURITY+ 2.0 ACCESSORIES
882LMW
Multi-Function Door Control
893LM
Remote Control
Hardware
INSTALLATION
Hex Bolt 5/16"-18 x 7/8" (4) Lock Washer 5/16"-16 (4)
Lag Screw 5/16"-9 x 1-5/8" (2) Self-Threading Screw 1/4"-14 x 5/8" (2)
Clevis Pin 5/16" x 2-3/4" (1) Ring Fastener (3)
Clevis Pin 5/16" x 1-1/4" (1) Carriage Bolt 1/4"-20 x 1/2" (2)
Clevis Pin 5/16" x 1" (1) Wing Nut 1/4"-20 (2)
Nut 5/16"-18 (4)
DOOR CONTROL HARDWARE
Screw 6AB x 1" (2) Drywall Anchors (2)
Screw 6-32 x 1" (2)
AB
C
J
N
I
OP
DE
F
H
GK
L
M
Not Provided
Not
Provided

7
Preparation
Carton Inventory: Models 8360W, 8360WL, and 8360WLB
Accessories will vary depending on the garage door opener model purchased. Depending on your
specific model, other accessories may be included with your garage door opener. 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
G. Emergency release rope and handle
H. Rail
I. Garage door opener
J. Sprocket cover
K. Chain
L. Door control
M. White and red/white wire
N. The Protector System®
Safety reversing sensors with white and white/black wire attached: Sending senor
(1), receiving sensor (1), and safety sensor brackets (2)
O. Safety labels and literature
P. Rail grease
Q. Battery
SECURITY+ 2.0 ACCESSORIES
886LMW
Motion Detecting Control Panel
893LM
Remote Control
Hardware
INSTALLATION
Hex Bolt 5/16"-18 x 7/8" (4) Lock Washer 5/16" (4)
Lag Screw 5/16"-9 x 1-5/8" (2) Self-Threading Screw 1/4"-14 x 5/8" (2)
Clevis Pin 5/16" x 2-3/4" (1) Ring Fastener (3)
Clevis Pin 5/16" x 1-1/4" (1) Carriage Bolt 1/4"-20 x 1/2" (2)
Clevis Pin 5/16" x 1" (1) Wing Nut 1/4"-20 (2)
Nut 5/16"-18 (4)
DOOR CONTROL HARDWARE
Screw 6AB x 1" (2) Drywall Anchors (2)
Screw 6-32 x 1" (2)
AB
C
J
N
I
O
D
E
F
H
G
K
L
M
Not Provided
Not
Provided
P
Q

8
Preparation
Carton Inventory: Models 8365W and 8365W-267
Accessories will vary depending on the garage door opener model purchased. Depending on your
specific model, other accessories may be included with your garage door opener. 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
G. Emergency release rope and handle
H. Rail
I. Garage door opener
J. Sprocket cover
K. Chain
L. Door control
M. White and red/white wire
N. The Protector System®
Safety reversing sensors with white and white/black wire attached: Sending Sensor (1)
Receiving Sensor (1) and Safety Sensor Brackets (2)
O. Safety labels and literature
P. Rail grease
SECURITY+ 2.0®ACCESSORIES
882LMW
Multi-Function Door Control
893LM
Remote Control
Hardware
Installation Door Control Hardware
Hex bolt 5/16"-18 x 7/8" (4)
Lag screw 5/16"-9 x 1-5/8" (2)
Clevis Pin 5/16" x 2-3/4" (1)
Clevis Pin 5/16" x 1-1/4" (1)
Clevis Pin 5/16" x 1" (1)
Nut 5/16"-18 (4)
Lock washer 5/16" (4)
Self-threading screw 1/4"-14 x 5/8" (2)
Ring fastener (3)
Carriage bolt 1/4"-20 x 1/2" (2)
Wing nut 1/4"-20 (2)
Screw 6AB x 1" (2)
Screw 6-32 x 1" (2)
Drywall anchors (2)
AB
C
J
N
I
O
D
E
F
H
G
K
L
M
Not Provided
Not
Provided
P

9
Assembly
1 Attach the Rail to the Garage Door Opener
MODELS 8355W AND 8355W-267
To avoid possible SERIOUS INJURY to finger from moving garage door opener:
• ALWAYS keep hand clear of sprocket while operating opener.
• Securely attach sprocket cover BEFORE operating.
To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the
top of the opener.
NOTE: ONLY use the bolts removed from the garage door opener. Place the garage door opener on
the packing material to prevent scratching.
1. Remove bolt and lock nut from the top of the garage door opener.
2. Align the rail and the styrofoam over the sprocket. Cut the tape from the rail, belt, and
styrofoam.
3. Fasten the rail with the previously removed washered bolt and lock nut.
4. Position the belt around the garage door opener sprocket.
5. Attach the sprocket cover over the garage door opener sprocket and attach with hex screws.
Hex Screw
#8x3/8"
Washered Bolt
5/16"-18x1/2" Lock
Nut
Washered Bolt 5/16"-18x1/2"
(Mounted in the garage
door opener)
Hex Screw
#8x3/8"
(Packed with the
sprocket cover)
Lock Nut
(Mounted in the
garage door opener)
HARDWARE

10
Assembly
2 Tighten the Belt
MODELS 8355W AND 8355W-267
1. By hand, thread the spring trolley nut on the threaded shaft until it is finger tight against the
trolley. Do not use any tools.
2. Insert a flathead screwdriver tip into one of the nut ring slots and brace it firmly against the
trolley.
3. Tighten the spring trolley nut with an adjustable wrench or a 7/16" open end wrench about a
quarter turn until the spring releases and snaps the nut ring against the trolley. This sets the
spring to optimum belt tension.
Spring Trolley Nut
(To motor unit)
Nut ring
slot
Nut Ring Nut Ring
AFTER RELEASE
1-1/4"
(3.18 cm)
BEFORE
1"
(2.5 cm)
1
2
3