The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
Owner’s Manual
Please read this manual and the enclosed safety materials carefully!
Periodic checks of the operator by a qualified technician are required to ensure
safe operation.
The model number label is located inside the control box of your operator.
■ Serial #
■ Installation Date
TABLE OF CONTENTS
WARNINGWARNING
WARNING
WARNING
CAUTIONCAUTION
WARNING
WARNING
WARNINGWARNING
2-7 INTRODUCTION
2 Safety Symbol and Signal Word Review
3 Operator Specifi cations
4-5 Safety Installation Information
6 Carton Inventory
6 Hardware Inventory
7 Additional Items for Purchase
7 Tools Needed
8-12 PREPARATION AND OVERVIEW
8 Single Gate Overview
9 Dual Gate Overview
10 Check Your Gate
11 Mounting Options
12-21 INSTALLATION
12-18 Attach the Operator to the Gate
19-20 Mount the Control Box
21-22 WIRING
21-23 Connect Gate Operator (Gate 1) to Control Box
24-26 Connect Gate Operator (Gate 2) to Control Box
(Model LA412-S Only)
27-32 SOLAR PANEL INSTALLATION
27 Select Site for Solar Panel(s)
28 Overview of Solar Panel Installation
29 Position Solar Panel (s)
30 Position Solar Bracket
30 Insert Mounting Bolts
30 Secure Solar Panel(s) to Solar Bracket
30 Mount Solar Panel(s) Assembly
31 Connect Solar Panel(s) to Operator Control Box
32 Connect Batteries
33-36 PROGRAMMING
33-34 Program Limits
35 Force and Timer To Close
36 To Add or Reprogram a Remote Control
36 To Add a Wireless Keyless Entry
36 To Erase All Codes
37-43 OPERATION AND MAINTENANCE
37 Important Safety Information
37 Using Your Gate Operator
37 Manual Release
37 Maintenance
39 Wiring Diagram
40 Diagnostic Chart
41-43 Troubleshooting
44-45 REPAIR PARTS
46 ACCESSORIES
47 WARRANTY
47 REPAIR PARTS AND SERVICE
INTRODUCTION
BACK TEMPLATE FOR POST BRACKET MOUNTING
Safety Symbol and Signal Word Review
This gate 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
Mechanical
Electrical
warnings that accompany them. The hazard may come
from something mechanical or from electric shock. Read
the warnings carefully.
When you see this Signal Word on the following pages,
it will alert you to the possibility of damage to your gate
and/or the gate operator if you do not comply with the
cautionary statements that accompany it. Read them
carefully.
IMPORTANT NOTE
• BEFORE attempting to install, operate or maintain the
operator, you must read and fully understand this manual
and follow all safety instructions.
• DO NOT attempt repair or service of your commercial
Introduction 2
door and gate operator unless you are an Authorized
Service Technician.
Operator Dimensions and Specifications
Main Supply 12VDC Battery run. Operational between 11.5VDC and 14.5VDC.
Accessory Power 12V nominal Class II battery voltage source is limited to:
• Solar or AC Cable up to 50' - 500 mA
• AC Cable 50' up to 250' - 250mA
• AC Cable 250' up to 1000' - 100mA
NOTE: Increased accessory power drawn from the operator will shorten the
battery life.
Battery Charger Supply (Optional) 14.5Vac nominal, 30 VA max.
Maximum Gate Length and Weight 16 ft. at 550 lbs.
Temperature -20°C to +50°C (-4°F to 122°F)
Protection Fuse Battery 1 ATC 20A
Protection Fuse Battery 2 ATC 20A
4.50"
(11.2 cm)
4.00"
(10.2 cm)
Weight: 47 lbs. (21 kg)
.250"
(0.635 cm)
14"
(35.6 cm)
(95.0 cm)
10"
(25.4 cm)
36.3"
(92.1 cm)
.475" DIA.
(1.2 cm DIA.)
37.4"
6"
(15.2 cm)
53.5"
(136.0 cm)
3 Introduction
SAFETY INSTALLATION INFORMATION
1. READ and FOLLOW all instructions.
2. The gate operator is intended for use with Class I
vehicular swing gates.
Class I denotes a vehicular gate operator (or system)
intended for use in a home of one to four single
family dwellings, or a garage or parking area associated
therewith.
Install the gate operator only when the operator is
appropriate for the construction and the usage class of
the gate.
3. Gate operating system designers, installers and users
must take into account the possible hazards associated
with each individual application. Improperly designed,
installed or maintained systems can create risks
for the user as well as the bystander. Gate system
design and installation must reduce public exposure to
potential hazards. Install the gate operator only when
the operator is appropriate for the construction of the
gate and the usage class of the gate. All exposed pinch
points must be eliminated or guarded.
4. A gate operator can create high levels of force during
normal operation. Therefore, safety features must be
incorporated into every installation. Specifi c safety
features include safety sensors.
5. The gate must be properly installed and work freely in
both directions prior to the installation of the gate operator.
6. The gate must be installed in a location so that enough
clearance is provided between the gate and adjacent
structures when opening and closing to reduce the risk
of entrapment. Swinging gates shall not open into public
access areas.
7. The operator is intended for use only on gates used for
vehicles. Pedestrians must be supplied with a separate
access opening. The pedestrian access opening
shall be designed to promote pedestrian usage. The
pedestrian access shall be located such that persons
will not come in contact with the moving vehicular gate.
8. Pedestrians should never cross the pathway of a
moving gate. The gate operator is not acceptable for
use on any pedestrian gate. Pedestrians must be
supplied with a separate pedestrian access.
9. For an installation utilizing non-contact sensors (safety
sensors), see product manual on the placement of
non-contact sensors (safety sensors) for each type of
application.
a. Care shall be exercised to reduce the risk of
nuisance tripping, such as when a vehicle trips the
safety sensor while the gate is still moving.
b. One or more non-contact sensors (safety sensors)
shall be located where the risk of entrapment or
obstruction exists, such as the perimeter reachable
by a moving gate or barrier.
10. For a gate operator utilizing a contact sensor such as
an edge sensor:
a. A hard wired contact sensor shall be located and
its wiring arranged so the communication between
the sensor and the gate operator is not subject to
mechanical damage.
b. One or more contact sensors shall be located on
the inside and outside leading edge of a swing gate.
Additionally, if the bottom edge of a swing gate is
greater than 6" (152 mm) above the ground at any
point in its arc of travel, one or more contact sensors
shall be located on the bottom edge.
11. Never mount any device that operates the gate
operator where the user can reach over, under, around
or through the gate to operate the controls. Controls
are to be placed at least 6' (1.8 m) from any part of the
moving gate:
• A hard wired control device shall be located and its
wiring arranged so that communication between the
control device and the gate operator is not subject to
mechanical damage.
Introduction 4
12. Controls intended to be used to reset an operator after
2 sequential activations of the entrapment protection
device or devices must be located in the line of sight
of the gate, or easily accessible controls shall have a
security feature to prevent unauthorized use. Never
allow anyone to hang on or ride the gate during the
entire travel of the gate.
13. Each gate operator is provided with two safety warning
placards. The placards are to be installed on the front
and back of the gate where they are plainly visible. The
placards may be mounted using cable ties through the
four holes provided on each placard.
All warning signs and placards must be installed
where visible in the area of the gate.
14. To AVOID damaging gas, power, or other underground
utility lines, contact underground utility locating
companies BEFORE digging.
15. SAVE THE INSTRUCTIONS.
To prevent SERIOUS INJURY or DEATH from a moving gate:
• Install warning signs on the front and back of the gate in
PLAIN VIEW.
• Permanently secure each warning sign in a suitable manner
using fastening holes.
Moving Gate Can Cause
Injury or Death
KEEP CLEAR! Gate may move at any
time without prior warning.
Do not let children operate the gate or
play in the gate area.
This entrance is for vehicles only.
Pedestrians must use separate entrance
5 Introduction
Carton Inventory
This operator comes with the hardware to install on a gate that pulls-to-open. If your application requires the gate to be
pushed open, accessory kit 50-19503 is required.
Extension Bracket
Model LA412 (1)
Model LA412-S (2)
Cable Ties (4)
Gate Operator
Model LA412 (1)
Model LA412-S (2)
Gate Bracket
Model LA412 (1)
Model LA412-S (2)
Control Box (1) with
2 Batteries
Post Bracket
Model LA412 (1)
Model LA412-S (2)
Moving Gate Can Cause
Injury or Death
KEEP CLEAR! Gate may move at any
time without prior warning.
Do not let children operate the gate or
play in the gate area.
This entrance is for vehicles only
Pedestrians must use separate entrance
Warning Signs (2)
Wire Nuts (6)
Model LA412 ONLY
Extension Cable
Model LA412-S ONLY
Hardware Inventory
NOTE: Hardware quantities shown below are for LA412. Quantities are doubled for LA412-S.
12V 10W Solar Panel
Model SOLPNL10W12V (1)
Watertight Connector
Model LA412-S ONLY (2)
Junction Box
Model LA412-S ONLY
Key (2)
Hex Nut 5/16"-18 (1)
Hex Nut 3/8"-16 (3)
Hex Bolt 5/16"-18 x 1-1/2 (1)
Flat Washer 5/16" (1)
Lock Washer 5/16" (1)
Lock Washer 3/8" (3)
Hex Bolt
3/8"-16 x 1-1/2" (1)
Cap
Flat Washer 3/8" (3)
Pin (2)
Hairpin Clip (2)
Carriage Bolt 3/8" x 5-15/16" (2)
Introduction 6
Additional Items For Purchase
The following items are REQUIRED to complete
the installation:
ALL MODELS:LA412-S ONLY:
SAFETY SENSORS
The Model 50-220 safety sensors are intended for
installation with the operators covered in this manual.
To order call 1-800-528-2806 or visit www.liftmaster.com.
HARDWARE
• 5/16" mounting hardware for gate bracket.
• The following hardware is needed to mount the control
box depending on the mounting surface:
Wood: Four #8 1-1/4" zinc plated wood screws.
Metal: Four #10-32x6" zinc plated machine screws with
nut and lock washers.
Concrete, Brick, etc.: Four 1/4" x 1-3/4" masonry
screws.
CONDUIT
UL Listed outdoor electrical conduit with 3/4" diameter to
hold the extension cable between the junction box and the
control box.
Tools Needed
During assembly, installation and adjustment of the operator, instructions will call for tools as illustrated below.
Deep Well Sockets
and Wrench
1/2", 5/8", 7/16", 9/16"
and 1/4"
Carpenter's Level
Screwdriver
Drill
Adjustable End Wrench
Hammer
Drill Bits
1/2", 3/16", 5/16"
and 5/32"
Phillips Head Screwdriver
2
1
Tape Measure
Clamps
Welder (Optional)
Pencil
Wire Cutters (Optional) Wire Strippers (Optional)
7 Introduction
Mov
i
ng Gate Can Cause
Injury or Death
KEEP CL
EAR!
Gate ma
y move at any
time wi
thou
t p
rior
warn
in
g.
Do no
t let ch
ildren opera
te the gate o
r
play i
n
th
e gate
area.
This ent
r
ance is for vehi
cles
on
ly
Pedestr
ians mu
st use sep
ar
ate
entr
an
ce
12
gauge
wire
8 ft.
(2.4 m)
OVERVIEW OF TYPICAL INSTALLATION
Outside Property
Inside Property
Direction of
Gate ravel
Moving Gate Can Cause
Injury or Death
KEE
P CLEAR! Gate
ma
y move at any
ti
me wi
thou
t prior warn
in
g.
Do
not l
et children
op
erate th
e gate or
p
lay
in th
e gate ar
e
a.
T
h
is entr
a
nce
is
f
or vehicles onl
y
Pedestri
a
ns must
u
se s
eparate en
trance
T
12
gauge
wire
8 ft.
(2.4 m)
LEFT-HAND GATE
Warning Sign
To prevent SERIOUS INJURY or DEATH; one or more
non-contact sensors shall be located where the risk of
entrapment or obstruction exists.
Solar Panel
(facing South)
PVC Conduit (not
provided) to
protect the power
cable for solar and
low voltage wire
from lawn mowers
and string
trimmers.
Earth Ground
Installation
(Optional)
Control Box
with Batteries
Antenna
Hinge
Post Bracket
Operator Cable
Operator
Safety
Sensors
Gate
Bracket
NOTE: One or more non-contact sensors shall
be located where the risk of entrapment or
obstruction exists at either the opening or
closing direction. Care shall be exercised to
reduce the risk of nuisance tripping, such as
when a vehicle, trips the sensor while the gate
is still moving.
Preparation and Overview 8
Gate
Bracket
Safety Sensors
Warning
Sign
Post
Bracket
Operator
Operator Cable
Hinge
Antenna
Solar Panel
(facing South)
Control Box
with Batteries
PVC Conduit (not provided)
to protect the power cable
for solar and low voltage wire
from lawn mowers and string
trimmers.
Earth Ground
Installation
(Optional)
Dual Gate Typical Installation
Outside Property
Warning Sign
Hinge
Solar Panel
(facing South)
Control
Box with
Batteries
Antenna
Post Bracket
Gate 1
Operator
Cable
Cause
at any
move
ay
Moving Gate Can
Injury or Death
Gate m
!
AR
ate the gate or
e
KEEP CLE
time without prior warning.
rate entranc
Do not let children oper
y in the gate area.
use sepa
t
ance is for vehicles only
pla
r
ans mus
This ent
Pedestri
Gate Bracket
Direction of
T
Gate 1 ravel
Gate 2
Inside Property
Junction Box
Extension Cable
Direction of
T
Gate 2 ravel
Safety Sensors
PVC Conduit (not provided) to
protect the power cable for
solar and low voltage wire
from lawn mowers and string
trimmers.
12
gauge
wire
8 ft.
(2.4 m)
Safety Sensors
Earth Ground
Installation
(Optional)
NOTE: One or more non-contact sensors shall
be located where the risk of entrapment or
obstruction exists at either the opening or
closing direction. Care shall be exercised to
reduce the risk of nuisance tripping, such as
when a vehicle, trips the sensor while the gate
is still moving.
9 Preparation and Overview
Check Your Gate
Gate MUST be level.
be plumb.
Gate and gate post MUST
Remove ANY/ALL wheels from the bottom of gate.
Gate MUST NOT hit or drag across ground.
Gate MUST swing freely and be supported entirely by its hinges.
Preparation and Overview 10
Mounting Options
Mounting locations vary depending on the type and style of your gate.
NOTES:
• The top of the operator must be mounted at least 10 inches above the ground. Environmental conditions should be considered at this
time.
• The operator is not recommended for plastic or vinyl gates. Contact the gate’s manufacturer for recommendations and options.
Recommended:
= Gate post bracket mounting locations
= Gate bracket mount locations
LEFT-HAND HINGE MOUNTED
Typical Chain-Link Gate
Typical Farm/Ranch Gate
RIGHT-HAND HINGE MOUNTED
Typical Chain-Link Gate
Typical Farm/Ranch Gate
Typical Wood GateTypical Wood Gate
Typical Tubular Metal GateTypical Tubular Metal Gate
11 Preparation and Overview
INSTALLATION
MANUAL RELEASE
Insert the key into the lock and turn it 180°
1
counterclockwise. Turn the release lever
180° counterclockwise. The operator is
now in manual mode.
DETERMINE THE POSITION OF THE EXTENSION BRACKET
The extension bracket can be assembled to work on a Left-Hand or a Right-Hand gate. Review the gate types
2
below and select the type of installation required.
NOTE: If the extension bracket is not assembled correctly damage to the operator may result.
Left-Hand GateRight-Hand Gate
Key
Release
Lever
Left-Hand Gate
IMPORTANT NOTE: For Push to Open installation purchase kit 50-19503, see accessories.
Installation 12
Right-Hand
Gate
MEASURING AND MARKING FOR THE GATE BRACKET
Before proceeding, begin with the gate in the fully closed position. There are two methods for determining the
3
proper location of the post brackets:
• Paper template (located on the back page of this manual. Must be cut out.)
• Tape measure.
Either method will work depending on preference.
NOTE: Be sure gate is in the closed position before proceeding.
Template Method
Place the template (provided on the back page) under the gate hinge point. Use a screwdriver or dowel rod to
temporarily mark the location in front of the gate post.
LEFT SIDE BRACKET MOUNTING
Gate Post
Gate Hinge Point
TOP VIEW
Gate Post
Use a screwdriver or dowel rod to
temporarily mark measurement.
RIGHT SIDE BRACKET MOUNTING
Gate Hinge Point
TOP VIEW
Gate Post
Use a screwdriver or dowel rod to
temporarily mark measurement.
Tape Measure Method
Place the measuring tape under the gate hinge point and measure 7". Use a screwdriver or dowel rod to
temporarily mark the location of the fi rst measurement.
LEFT SIDE BRACKET MOUNTING
Gate Post
Gate Hinge Point
RIGHT SIDE BRACKET MOUNTING
Gate Post
Gate Hinge Point
Gate Post
7"
X
Gate Post
7"
X
Gate Post
Measure 7" from the previous mark.
Gate Post
X
Gate Hinge Point
7"
Gate Hinge Point
Gate Post
7"
X
Use the screwdriver or dowel rod to mark the location of the second measurement.
Gate Post
Gate Hinge Point
First Marking
X
Gate Hinge Point
First Marking
Gate Post
X
13 Installation
POSITION THE EXTENSION BRACKET TO POST BRACKET
Assemble the post bracket by placing the extension bracket on top of post bracket. Insert the bolt through
4
the brackets and fasten them using the washer, lock washer and nut. DO NOT TIGHTEN AT THIS TIME.
LEFT-HAND GATE
Hex Bolt 3/8"
Extension
Bracket
Post Bracket
Washer
Lock Washer
Nut
RIGHT-HAND GATE
Extension
Bracket
Post Bracket
Lock Washer
NOTE: All the illustrations on the following pages display a typical Left-Hand Gate installation.
ATTACH BRACKETS TO GATE OPERATOR
Attach post bracket and gate bracket to operator using pins and hairpin clips.
5
Hex Bolt 3/8"
Washer
Nut
Post Bracket
Pin
Pin
Gate
Bracket
Hairpin
Clip
Hairpin
Clip
Installation 14
POSITION GATE OPERATOR ON GATE
The post bracket assembly can be mounted several places on the gate post. Refer to page 11 for mounting options.
6
Place the operator arm against gate post at the desired vertical position and temporarily secure post bracket with a
clamp. The gate operator (arm) must be level.
Open the gate to desired open position (no greater than 100°) and hold operator against gate. Mark mounting holes on
gate for reference. Temporarily secure the gate bracket using a clamp.
For push to open installations refer to instructions with push to open kit 50-19503.
Hold the post bracket in the
desired position. Align the
7
extension bracket to a position
as CLOSE AS POSSIBLE
above the marker. Insert hex
bolt through extension bracket
and post bracket and secure
with washer, lock washer and
nut.
15 Installation
Hex Bolt 3/8"
Washer
Lock Washer
Nut
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