Chamberlain LA400DC User Manual

Gate hinge center
Post bracket
TOP VIEW OF GATE
7" (17.8 cm)
7" (17.8 cm)
This QuickStart is intended to highlight a single gate
application. Each application is unique and it is the
responsibility of the purchaser, installer and end user to ensure
that the total gate system is installed and operated properly.
Refer to the installation manual for complete information
regarding installation, testing, and programming.
QuickStart
for single gate application
INSTALLATION
01-38139 © 2016, LiftMaster – All Rights Reserved
845 Larch Avenue
Elmhurst, Illinois 60126-1196
LiftMaster.com
Install the earth ground rod within 3 feet (.9 m)
of the control box. The ground wire must be a
single, whole piece of wire.
LA400DC
Primary 24 VDC Actuator Arm for
single swing gate applications
LA400DCS
Secondary 24 VDC Actuator Arm for
dual swing gate applications
LA400PKGU
Single Arm Package
Model LA400
Check national
and local codes
for proper depth
2016 UL 325 Gate Operators require use of LiftMaster
external monitored entrapment protection devices.
Attach brackets to operator Determine mounting location Position the operator Secure the brackets
Install the Control Box Earth Ground Rod Connect the Operator Arm to the Control Box

Chamberlain LA400DC Specifications

General

Brand	Chamberlain
Model	LA400DC
Category	Door Opening System
Language	English

Summary

Installation

Attach Brackets to Operator

Attach brackets to the operator arm for gate installation.

Determine Mounting Location

Identify the correct positioning for the operator on the gate.

Position the Operator

Place the operator arm correctly relative to the gate.

Secure the Brackets

Fasten the operator brackets securely to the gate and post.

Install the Control Box

Mount and install the main control box for the gate operator.

Earth Ground Rod

Install the earth ground rod for electrical safety compliance.

Connect Operator Arm to Control Box

Connect the operator arm wiring to the main control box.

Wiring and Adjustments

Install Monitored Entrapment Protection

Install external entrapment protection devices for safety.

Connect Power Wiring and Earth Ground Rod

Connect incoming power, batteries, and earth ground rod.

Set Limits and Force

Program gate limits and adjust force settings for operation.

Perform Obstruction Test

Test the gate's safety reversal mechanism.

Installation Checklist

Verify all installation steps and connections are complete.