Chamberlain Contractor Series User manual

CONTENTS
Preparation. . . . . . . . . . . . . . . .1-4
Assembly . . . . . . . . . . . . . . . . . . 5
Installation . . . . . . . . . . . . . . .6-13
Install the Door Control. . . . . . 14-15
Install the Protector System®. . 16-19
Power. . . . . . . . . . . . . . . . . . 20-21
Adjustments . . . . . . . . . . . . . 22-24
Operation . . . . . . . . . . . . . . . 25-30
Maintenance . . . . . . . . . . . . . . . 31
Troubleshooting. . . . . . . . . . . 32-33
Accessories. . . . . . . . . . . . . . . . 34
Warranty. . . . . . . . . . . . . . . . . . 35
Repair Parts . . . . . . . . . . . . . 36-37
CONTRACTOR Series
DC Chain Drive
Garage Door Opener
LiftMaster
300 Windsor Drive
Oak Brook, IL 60523
■Please read this manual and the enclosed safety materials carefully!
■Fasten the manual near the garage door after installation.
■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.
■The model number label is located on the front panel of your garage door opener.
■This garage door opener is ONLY compatible with MyQ®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.
NOTE: If you are installing the garage door opener on a one-piece door, visit
LiftMaster.com for installation instructions.
LiftMaster.com
Serial Number:
Date of Purchase:
Model 8160LA
FOR RESIDENTIAL USE ONLY
Write down the following information for
future reference:
.

2
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 strictaccordance with the instructionsand warnings contained in
this manual.
When you see these Safety Symbols and Signal Words on the following pages,they will alertyou 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 alertyou to the possibilityofdamage to
your garage door and/or the garage door opener ifyou do not comply with the cautionarystatements
that accompany it. Read them carefully.
Unattended Operation
The Timer-to-Close (TTC) feature, the MyQ®Smartphone Control app, and MyQ®Garage Door and
Gate Monitor are examples ofunattended close and are to be used ONLY with sectional doors.Any
device or feature that allowsthe door to close withoutbeing in the line of sight ofthe 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.
Check the Door
To prevent possible SERIOUSINJURYor DEATH:
lALWAYS call a trained door systems technician if garage door binds, sticks, or is outof
balance. An unbalanced garage door mayNOTreverse when required.
lNEVER try to loosen, move or adjust garage 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 garage door BEFORE installation and
operating garage door opener to avoid entanglement.
lDO NOT install on a one-piece door if using devices or featuresproviding unattended close.
Unattended devices and features are to be used ONLY with sectional doors.
To preventdamage to garage door and opener:
lALWAYS disable locks BEFORE installing and operating the opener.
lONLY operate garage door opener at120V,60Hzto avoid malfunction and damage.
Before you begin:
1. Disable locks and remove anyropes 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 isoutofbalance,call a trained door systems
technician.
4. Check the seal on the bottom of the door.Any gap between the
floor and the bottom ofthe door must notexceed 1/4 inch (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 7.
Torsion
Spring
Extension
Spring
OR
Preparation

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

4
Carton Inventory
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 accessorieswill 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/blackwire 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) Screw 6AB x 1" (2)
Lag screw 5/16"-9 x 1-5/8" (2) Screw 6-32 x 1" (2)
Clevis Pin 5/16" x 2-3/4" (1) Drywall anchors (2)
Clevis Pin 5/16" x 1-1/4" (1) Insulated staples
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)
AB
C
J
N
I
O
D
E
F
H
G
K
L
M
Not Provided
Not
Provided
P
Preparation

5
Assembly
1 Attach the Rail to the Garage Door Opener
To avoid possible SERIOUS INJURY to finger from moving garage door opener:
lALWAYS keep hand clear of sprocket while operating opener.
lSecurely 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 fromthe garage door opener.Place the garage door opener on
the packing material to prevent scratching.
1. Remove the two boltsfrom the top of the garage door opener.
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 previouslyremoved bolts.
4. Position the chain around the garage door opener sprocket.
5. Install the sprocket cover by squeezing the sides and inserting the tabsinto the slots on the
garage door opener.
Washered Bolt 5/16"-18x1/2"
2 Tighten the Chain
1. Loosen the inner nut and lock washer on the trolley threaded shaft.
2. Tighten the outer nutuntil 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.
Sprocketnoise can resultif the chain istoo loose.During future maintenance,ALWAYS pull the
emergency release handle to disconnectthe trolley before adjusting the chain.
1/2" (13 mm)

6
Installation
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
1. READ AND FOLLOW ALL INSTALLATION WARNINGS AND INSTRUCTIONS.
2. Install garage door opener ONLY on properlybalanced and lubricated garage 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 opener.
4. Disable ALL locksand remove ALL ropes connected to garage door BEFORE installing opener
to avoid entanglement.
5. Install garage door opener 7 feet (2.13 m) or more above 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 connectgarage door opener to power source until instructed to do so.
8. NEVER wear watches, rings or loose clothing while installing or servicing opener. They could be
caughtin garage door or opener mechanisms.
9. Install wall-mounted garage door control:
lwithin sight of the garage door.
lout of reach of children at minimum height of 5 feet (1.5 m).
laway from ALL moving parts of the door.
10. Place entrapment warning label on wall next to garage door control.
11. Place manual release/safety reverse test label in plain view on inside of garage 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 devicesor featuresproviding unattended close.
Unattended devices and features are to be used ONLY with sectional doors.
NOTE: If you are installing the garage door opener on a one-piece door, visit LiftMaster.com for installation instructions.

7
Installation
1 Determine the Header Bracket Location
To prevent possible SERIOUS INJURY or DEATH:
lHeader bracketMUST be RIGIDLY fastened to structural supporton header wall or ceiling,
otherwise garage door might NOT reverse when required. DO NOT install header bracket
over drywall.
lConcrete anchors MUSTbe used if mounting header bracket or 2x4 into masonry.
lNEVER try to loosen, move or adjustgarage door,springs,cables,pulleys, brackets, or their
hardware, ALL of which are under EXTREME tension.
lALWAYS call a trained door systems technician if garage door binds, sticks, or is outof
balance. An unbalanced garage door mightNOT reverse when required.
lDO NOT enable the Timer-to-Close functionality if operating either one-piece or swinging
garage doors. To be enabled ONLY when operating a sectional door.
NOTE: If you are installing the garage door opener on a one-piece door, visit LiftMaster.com for
installation instructions.
Close the door and mark the inside vertical centerline ofthe garage 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 ofthe 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 isminimal. (It maybe 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 securelyfasten 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: Ifthe total number of inches exceeds the heightavailable in your garage,use the maximum
height possible, or refer to page 8 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

8
Installation
2 Install the Header Bracket
You can attach the header bracketeither to the wall above the garage door, or to the ceiling. Follow the
instructions which will work best for your particular requirements. Do not install the header bracket
over drywall. If installing into masonry, use concrete anchors (not provided).
HARDWARE
Lag Screw 5/16"-9 x 1-5/8"
OPTION A WALL INSTALLATION
1. Center the bracketon the vertical centerline with the bottomedge of the bracket on the
horizontal line as shown (with the arrow pointing toward the ceiling).
2. Mark the vertical set of bracket holes (do not use the holes designated for ceiling mount). Drill
3/16" pilot holes and fasten the bracket securely to a structural support with lag screws.
Wall Mount
Optional
Mounting
Holes
Vertical
Centerline of
Garage Door
(Header Wall)
Header
Bracket
2x4 Structural
Support
Door Spring
(Garage Door)
Highest Point of
Garage Door
Travel
Horizontal
Line
Lag Screw
5/16"-9 x 1-5/8"
OPTION B CEILING INSTALLATION
1. Extend the vertical centerline onto the ceiling as shown.
2. Center the bracketon the vertical mark, no more than 6" (15 cm) from the wall. Make sure the
arrow is pointing toward the wall. The bracket can be mounted flush against the ceiling when
clearance is minimal.
3. Mark the side holes. Drill 3/16" pilot holes and fasten bracket securely to a structural support
with the hardware provided.
(Header Wall)
Ceiling Mounting Holes
(Finished Ceiling)
Vertical
Centerline of
Garage Door
Header
Bracket
6" (15 cm)
Maximum
Door Spring
(Garage Door)
Lag Screw
5/16"-9 x 1-5/8"

9
Installation
3 Attach the Rail to the Header Bracket
1. Align the rail with the header bracket. Insert the clevis pin through the holes in the header
bracket and rail. Secure with the ring fastener.
NOTE: Use the packing material as a protective base for the garage door opener.
HARDWARE
Clevis Pin 5/16" x 2-3/4" Ring Fastener
Ring
Fastener
Clevis Pin
5/16" X 2-3/4"
4 Position the Garage Door Opener
To prevent damage to garage door,restgarage door opener rail on 2x4 placed on top section of
door.
1. Remove the packing material and lift the garage door opener onto a ladder.
2. Fullyopen the door and place a 2x4 (laid flat) under the rail.
A 2x4 isideal for setting the distance between the rail and the door.Ifthe ladder is not tall enough you
will need help at this point. Ifthe door hits the trolley when it is raised, pull the trolley release arm down
to disconnect the inner and outer trolley.Slide the outer trolley toward the garage door opener. The
trolley can remain disconnected until instructed.
Connected Disconnected

10
Installation
5 Hang the Garage Door Opener
To avoid possible SERIOUS INJURY from a falling garage door opener, fasten it SECURELY to
structural supports of the garage. Concrete anchors MUST be used if installing ANY brackets into
masonry.
Hanging your garage door opener will vary depending on your garage.Two representative
installations are shown. Yours maybe different. Hanging brackets should be angled (Figure 1) to
provide rigid support. On finished ceilings (Figure 2), attach a sturdy metal bracket to structural supports
before installing the opener. This bracket and fastening hardware are not provided.
1. Measure the distance from each side ofthe motor unit to the structural support.
2. Cut both pieces of the hanging bracket to required lengths.
3. Drill 3/16" pilot holes in the structural supports.
4. Attach one end of each bracket to a support with 5/16"-18 x1-7/8" lag screws(not provided).
5. Fasten the opener to the hanging brackets with 5/16"-18 x 7/8" hex bolts, lock washers and
nuts.
6. Check to make sure the rail iscentered over the door (or in line with the header bracketifthe
bracket is not centered above the door).
7. Remove the 2x4. Operate the door manually.If the door hits the rail, raise the header bracket.
NOTE: DO NOT connect power to opener at this time.
FIGURE 1 FIGURE 2
(Not Provided)
Lag Screws
5/16"- 18x1-7/8"
Measure
Distance
Hex Bolt 5/16"- 18x7/8", Lock Washer 5/16", Nut 5/16"-18
FIGURE 3
Not Provided
Finished Ceiling
Unfinished Ceiling
Hex Bolt 5/16"- 18x7/8" Nut 5/16"-18Lock Washer 5/16"
HARDWARE