Chamberlain Liftmaster LA405-24 User manual

Doc 01-G0399
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Linear Actuator
Swing Gate Operator
Installation Manual
Model # LA405-24

2Contents
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Contents
Product Information and Specs. _____________________________________________ 3
Mechanical _________________________________________________________________________ 3
Electrical, Line Connections____________________________________________________________ 3
Electrical, Control Connections _________________________________________________________ 4
Preparations _____________________________________________________________ 5
Site Preparation______________________________________________________________________ 5
Site Layout _________________________________________________________________________ 6
Mechanical _________________________________________________________________________ 7
Electrical ___________________________________________________________________________ 8
Operating Instructions____________________________________________________ 12
Initial Test _________________________________________________________________________ 12
Functional Test _____________________________________________________________________ 14
End User Instructions ________________________________________________________________ 15
Replacement Parts _______________________________________________________ 17
Illustrated Parts _____________________________________________________________________ 17
Warranty And RGA (Returned Goods Authorization) _______________________________________ 18
Service and Tech. Reference _______________________________________________ 19
Service And Maintenance _____________________________________________________________ 19
Trouble Shooting____________________________________________________________________ 19

Product Information and Specs. 3
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Product Information and Specs.
The LA405-24 electromechanical gate operator can be mounted onto any swing gate up to 12 feet
wide. It is well equipped with a simple adjustable limit switch and a keyed emergency release.
Mechanical
Approx. Weight 22 lbs.
Dimensions 32.25”L x
3.625”W x
5.375”H
Max Gate Length 12 ft.
Max Gate Weight 300 lbs.
Cycles per hour 10
01-G 0399F4
Figure 1: Operator Specifications
Electrical, Line Connections
Incoming Line Voltage 115 VAC
Rated Current 1.4 Amps
Motor Voltage 24 VDC
Motor (2) Wattage 120 Watts (each)
Figure 2

4Product Information And Specs.
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POWER SUPPLY
The 24 DC operator requires 115 VAC power. The gauge wire depends on the distance run.
Consult your electrician to ensure a good power supply.
PROTECTION (See Figure 2)
Fuses for primary and secondary power:
1.6 Amp. 250V (line)
6.3 Amp 250V (control)
12 Amp. 250V (motor)
A varistor protects primary and secondary power over voltage. Operator torque control adjusts the
maximum output force of the operator (see Figure 13, Potentiometer #1).
CHARACTERISTICS
Solid state control panel allows the control of (2) 24 VDC, 120W actuators as follows:
Single button and Radio control command to: OPEN – STOP – CLOSE – STOP
Separate inputs for Open (with timer to close) and Stop
Timer to close built in
Safety input to stop the gate and to reverse the gate during closing cycle
Adjustable decel. speed, motor speed, motor power, and slave delay time
Electrical, Control Connections
The Eurostyle type connectors used in the LA405-24 control accept (2) stripped 16 gauge wires. Dry
contact control wires (no power) can fit more than (2) wires if smaller than 20 gauge wire is used.
Length is limited to 40 feet.

Preparations 5
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Preparations
Site Preparation
Using a licensed electrician, route power and control wires to the operator using appropriate conduit
and wire for your local code. Ensure gate swings freely and is level. Controls should be mounted
away from gate so people on the opposite side of the gate cannot reach through and start the gate
(see Figure 3).
NOTE: Plan gate location for accessories such as loops, photos eyes, etc. before beginning
installation.
01-G0399F12
Flashing Light
Photo Eyes
Control Box with Antenna
12 foot, 300 pount
maximum gate
Pillar for mounting
operator
Operator
Keypad/
Cardreader
Figure 3: Typical Installation

6Preparations
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Site Layout
NOTE: For push to open only – position plate F as shown in Figure 4.
Plate F
Push to Open
(optional)
01-G0399F15
Pull to Open
(typical)
Figure 4

Installation 7
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Installation
Mechanical
1 Attach plate “F” to the post so it is halfway between the ground and the
top of the gate. Refer to Figure 5.
2 Slide Plate “F” into bracket “H” and secure with bolt “E” and nut “G”.
3 When the gate is closed, attach plate “B” to the gate at the same height
as plate “F”.
4 Gate bracket “B” should be mounted approximately 23-1/4” from the gate
hinge point. The installed bracket must provide a level operation for the
operator.
5 Test the location before welding.
NOTE: When the gate is full open or full close, the unit should not
be at the end of its stroke.
01-G0399F21
Figure 5

8Installation
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Electrical
1. The electrical installation must meet national and local codes and should be performed by a
qualified electrician.
2. Read all manuals and safety instructions before beginning installation.
3. It is strongly recommended that safety equipment be used with this operator.
4. Power cables should be run in separate conduit from the control wiring.
5. Check all connections before applying power to units.
6. When voltage is supplied, the “Power” LED should be on.
7. If motor direction is not correct, reverse the open/close motor wires. Or as an alternate
method, you may also reverse the FCA-FCC limit switch wires.
8. The term “normally open” means that the contact points are open or apart until they are brought
together by electrical (radio receiver) or manual means (pushbutton).
9. The term “normally closed” means that the contact points are together or closed until opened
by electrical or manual means.
LINE POWER CONNECTIONS
1 Connect incoming line wires to the 3 pole terminal on control
board.
2 To attach power wires to the unit, remove the cover screw
holding black plastic power cover (see Figure 6).
This can be found in the lower right hand corner of the control
box.
3 Attach the “hot” (black), “neutral” (white) and “ground” (green)
wires as indicated on the control board. Figure 6
SAFETY DEVICES – (PHOTO EYES AND LOOP DETECTORS)
The LA 405-24 control box allows for (2) different safety inputs. The first uses terminals #1 and
#6; when activated it reverses a closing gate. The second type uses terminals #1 and #5; when
activated it stops the gate (will not open or close).
If gate was opening when obstruction occurred, once clear, the gate will continue to open. If gate
was closing when obstruction occurred, once clear, the gate will then begin reopening. Both
require connection to devices with normally closed contacts, which are opened when activated.
WARNING
Use of safety devices is recommended to prevent injury and entrapment.
STOP COMMAND
Mount a stop button near the gate. This allows the gate to be stopped in the case of an
emergency. A normally closed stop button suitable for exterior use should be used. The
connections for the stop button are #1 and #7.

Installation 9
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LOCKING DEVICES – (ELECTRICAL DEAD BOLT)
Locking devices may be used with the LA405-24 control panel. A 24V DC, 50W output is
maintained for 3 seconds when an open command is given. The terminal connections are #15
and #16.
RADIO CONTROLS AND SINGLE PUSH BUTTON STATIONS
Each control box comes pre-wired with a LiftMaster 412HM receiver. This receiver (or others) are
wired to terminals #1 and #2. Radio power is connected to terminals #17 (+) and #18 (-) for 24V
DC.
SAFETY EDGES
Electric gate edges are normally open devices. To wire an electric gate edge to a LA405-24
control panel, an auxiliary relay must be used. The procedure is a follows:
Attach one of the two electric gate edge wires to terminal #17
Attach the other wire to one of the coil terminals of a 24V DC relay (P/N 24-264-4)
Attach the remaining coil terminal to terminal #8
Attach the common and the normally closed contacts of the 24V DC relay to terminal #1
and #6
When the gate edge is contacted, the 24V DC relay will be energized causing an open circuit
between terminals #1 and #6.The gate operator will then reverse to the full open position.
KEYPADS/CARD READERS (See FIGURE 7)
Use terminal #1 and #3 for an open command only. The gate will time out and close if the timer
is activated.
Figure 7
AUDIO AND VISIBLE ALARMS
Warning devices may be used with the LA405-24 actuator. 24V DC, 50 W is supplied upon
opening and 3 seconds before closing. 24V DC, 50W warning devices are connected to
terminals #12 and #14.
When a safety command is received across terminals #1 and #5, actuator will stop but flasher will
continue until open or close limit switch is met.

10 Installation
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CONTROL CONNECTIONS
For each actuator, run (2) wires, 5 to 25 feet long of 14 gauge wire for power. Use (3) wires 16 to
20 gauge for the controls. If using (2) actuators, use motor cables of the same length and gauge
to ensure the motors run at the same speed.
NOTE: When actuator wiring is run to the bottom of the operator, mount using this hold
(!-- see Figure 8) to prevent plate from shearing cables.
01-g03099F22
Figure 8
WARNING
If operator does not stop in time, the plate may cut the cable.

Installation 11
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01-G0399F17
Master or
Single Unit
Actuator
#1
#3
#4
#5
#6
Control
Box
#22
#21
#9
#8
#1
(red)
(black)
(brown)
(brown)
(blue)
Slave Unit
Actuator
#1
#3
#4
#5
#6
Control
Box
#19
#20
#10
#11
#1
(red)
(black)
(brown)
(brown)
(blue)
Figure 9
INPUT/OUTPUT TERMINAL FUNCTIONS
1. Common 12. 24 VAC Flasher
2. Single Button 13. 24 VAC Courtesy Light
3. Open w/Timer 14. 24 VAC Common
4. Pedestrian 15. Lock (-) 24 VAC for 3 Seconds
5. Safety to Stop 16. Lock (+) 24 VAC for 3 seconds
6. Safety to reverse (to open position) 17. 24 VDS (+) continuous
7. Stop Button 18. 24 VDC (-) continuous
8. Close Limit (Master or Single Unit) 19. Motor (Slave)
9. Open Limit (Master or Single Unit) 20. Motor (Slave)
10. Open Limit (Slave) 21. Motor (Master or Single)
11. Close Limit (Slave) 22. Motor (Master or Single)
Table 1

12 Operating Instructions
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Operating Instructions
Initial Test
LIMIT SETTING AND ADJUSTMENT
1 To adjust the limits of the gate, remove end cap “J” by removing two “K” allen screws.
2 Adjust the close and open limit switches by turning the “L” nuts (10mm) as shown in
Figure 10.
Decrease
Travel
Increase
Travel
KJ
Pull to Open (Typical) configuration shown. When in,
Push to Open configuration, limit switches are reversed.
01-G0399F19
Close Limit
Switch
Blue: Limit Switch Common
Brown: Limit Switch Close
Decrease
Travel
Open Limit
Switch
Brown: Limit
Switch Open
Blue: Limit
Switch Common
Increase
Travel
L
Remove
End Cap
Figure 10

Operating Instructions 13
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PROGRAMMING
Dip Fix Settings (see Figure 13)
1) Dip Fix 1 (automatic closing):
01-G0399F11
Figure 11
Unlatched turns on the timer to close
01-G0399F10
Figure 12
Latched turns off the timer to close
NOTE: If you use Timer to Close, it is strongly recommended that you use safety
equipment.
2) Dip Fix 2 (condominium function):
Not used for residential operations.
Leave in open position.
3) Dip Fix 3 (extension or run time):
Controls the value of the max. run timer.
DIP FIX OPEN = 180 sec.
DIP FIX CLOSED = 90 sec. (recommended position is closed, 90 sec.)
Figure 13

14 Operating Instructions
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Potentiometer Adjustments (see Figure 13)
To decrease, turn potentiometer counter-clockwise.
To increase, turn potentiometer clockwise.
1) Power Control
Controls the electronic power limiter. Adjust it so the gate runs smoothly but can be
stopped by hand.
2) Cycle Speed
Controls the speed of the motor. Adjust as needed.
3) Brake Speed
Controls the deceleration speed. Adjust brake for smooth operation.
4) Stop Time
Works with Dip Fix 1 to control the timer to close. Min. 7-sec.; Max. 140-sec. If DIP FIX is
unlatched the timer is ON. If DIP FIX is latched the timer is OFF.
5) Decel Motor 2
Adjusts the slave delay time. Min. 1-sec.; Max. 10-sec.
NOTE: Avoid setting the potentiometers to absolute minimum or maximum.
Functional Test
ATTACH GATE
Disconnect manual release (see Figure 14 and Figure 15). Swing gate by hand to ensure smooth
and even operation.
POWER SETTING
Reconnect and lock gate manual release. Apply power and run gate. Adjust potentiometer (#1).
Decrease power until gate can be stopped by hand. Increase power slightly to account for wind,
snow, etc. If gate does not run smoothly, increase power further.
INSTALL SAFETY EQUIPMENT
Install safety equipment per the manufacturers instructions and ensure proper operation. Connect
equipment as described on pages 8 and 9. DO NOT operate the gate unsupervised without
testing the safety equipment.
INSTALL ACCESS CONTROLS
Install access control per the manufacturers instructions. Connect equipment as described on
pages 9 and 9.

Operating Instructions 15
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End User Instructions
SAFETY
DO NOT:
Operate a gate that is not in view of the person operating the gate
Allow children to play on gate
Attempt to fix a gate operator yourself, call a qualified serviceman
NOTE: Consult your supplier for technical support in your area.
ACCESS CONTROL
Make sure the user understands how to use the controls. Demonstrate them completely. Show
where the power on and off is in case of an emergency. Always show how to stop and prevent
entrapment. Show how to operate the manual disconnect.
TROUBLESHOOTING
If a problem occurs with the gate system, advise the owner of the following:
Do nothing and call the installer who performed original installation.
Question owner for problems per the Trouble Shooting section (page 19) for cause.
Technical assistance and parts are available to qualified and approved dealers.
MANUAL OPERATION
The LA405-24 has a simple manual release that allows the operator to be functional when there is
no electricity. See Figure 14 and Figure 15.
Figure 14
1 Move lock-cover until arrow is visible.
2 Insert key and rotate 90 degrees.
3 Press the back side of the door and rotate to a click by pulling from the front side.

16 Operating Instructions
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In order for the operator to run again, lower the small door and the first operation will restore the
actuator.
Move in
direction
of arrow
Pull
Press
Insert and
rotate 90 de
g
.
Rotate to click
01-0399F23
Figure 15

Replacement Parts 17
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Replacement Parts
Illustrated Parts
The only replacement parts available are referenced in Figure 16 and Table 2 below.
01-G0399F13
G412HM
BW24ST
01-G0399F3
01-G0399F1
903004B24
10
9
8
7
6
5
43
2
1
Figure 16
REF. # PART # QTY. DESCRIPTION REF. # PART # QTY. DESCRIPTION
1 23-9686080 1 Limit Switch 8 08-9686051 1 Release Gear
2 08-9686054 1 Release Lever 9 20-9686079 1 Motor
3 86-9686249 2 Pin 10 77-9686078 1 Mounting Kit
4 82-9686055 1 Threaded Rod - 90-3004B24 1 Radio Receiver
5 08-9686057 1 Guide Cover - BW24ST 1 Actuator
6 08-9686052 1 Support - G412HM 1 Radio
7 82-9686050 1 Lead Screw
Table 2

18 Replacement Parts
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Warranty And RGA (Returned Goods Authorization)
WARRANTY
LiftMaster warrants its products against defects in all workmanship and materials to the original
customer for one (1) year from the date of shipment. Should a defect arise within this period,
contact LiftMaster.
LiftMaster will provide replacement parts or, as its option, another operator. LiftMaster cannot be
responsible for damages or other cost caused by or which may result from installation, handling,
non-recommended operation abuse, or modifications not authorized by LiftMaster or for damages
which may arise out of use of the unit. If state laws preclude a prohibition of such damages, then
the liability shall be limited to the original invoice cost.
There are no other warranties of any kind, expressed or implied, including those of merchantability
or fitness. Some states do not allow preclusion or limitations upon implied warranties or upon how
long an implied warranty lasts or a limitation of incidental or consequential damages, so the above
limitations or exclusions may not apply to you.
This warranty gives you specific legal rights, and you may also have other right which vary from
state to state.
RGA
Any part, assembly, or product sold by LiftMaster, and that is still under warranty is eligible for
return for credit. For proper credit to be applied, call customer service for an RGA number. This
will track your claim and ensure that proper credit is issued.

Service and Tech. Reference 19
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Service and Tech. Reference
Service And Maintenance
See Illustrated Parts on page 17 for part details.
Clean and lubricate jackshaft (13), support (11) and end cap (2) twice a year, more frequently if in
dusty or high cycle environments. Use wheel bearing grease or similar. Also lubricate pivot points
with medium weight spray lubricant.
Trouble Shooting
Operator will not run Check power source, is the breaker tripped? Make certain
that 115v is getting to the control box. Is the green
“power” LED illuminated? Disconnect power and check
fuses on board.
Operator has power but
will not run Is your control device working properly. Check batteries in
transmitter. Observe the vertical row of green and red
LED’s, the “FT.OP, FT.CL and STOP” lights should not be
illuminated. If any of these are on, check for obstructions
to the safety devices. If any of these devices have been
bypassed, check for wire breakage.
Operator will open but
will not close Check power. Check for obstruction of safety devices.
Remember, there is a three second delay before the gate
operator will close.
Operator sounds as if it
is running but gate
does not move
Make sure that the disconnect lever has been engaged.
Operator still won’t run Call a qualified technician or LiftMaster.
REQUIRED INFORMATION
For best service, please have the following information:
Operator model number
Operator serial number
Wiring diagram, diagram number and revision
List of installed accessories

COPYRIGHT2001
ALL RIGHTS RESERVED
This document is protected by copyright and may not be copied or adapted without the prior written
consent of LiftMaster. This documentation contains information proprietary to LiftMaster and such
information may not be distributed without the prior written consent of LiftMaster. The software and
firmware included in the LiftMaster product as they relate to this documentation are also protected by
copyright and contain information proprietary to LiftMaster.
FOR TECHNICAL SUPPORT
Call our toll free numbers:
[phone]
[phone]
Installation and service information is
available six days a week.
TO ORDER REPAIR PARTS
Call our toll free numbers:
[phone]
[phone]
Prepare to provide the following
information when ordering repair parts:
"Part Number
"Part Name
"Model Number