Chamberlain LiftMaster 850LM

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INSTALLATION

The receiver and antenna use TV Type F coaxial connectors. The antenna

can be connected directly to the receiver or it can be installed remotely

using a coaxial cable extension kit (Model 86LM, 15 ft. or 86LMT, 25 ft.).

1 Select a location for the receiver which allows access to the terminals

and space for the antenna. Ensure antenna does not touch metal

surfaces. DO NOT bend or fold the antenna.

2 Fasten the receiver securely with the hook and loop fasteners

(provided) or screws (not provided).

3 After installation is complete, connect power. You may use 85LM

plug-in or 95LM wired-in transformer, or power provided from your

operator (9-30 V AC, 9-34 Vdc or see power ratings on next page).

NOTE: The receiver can command the operator to close the

door or gate by constant pressure. This feature is only available with a

wireless control panel (Model 885LM). To enable this feature, press

and hold the push bar until the gate or garage door moves to the

closed position.

To prevent possible SERIOUS INJURY or DEATH from electrocution:

• Be sure power is NOT connected BEFORE installing the receiver.

To prevent possible SERIOUS INJURY or DEATH from a moving gate

or garage door:

• ALWAYS keep remote controls out of reach of children. NEVER

permit children to operate, or play with remote control transmitters.

• Activate gate or door ONLY when it can be seen clearly, is properly

adjusted, and there are no obstructions to door travel.

• ALWAYS keep gate or garage door in sight until completely closed.

NEVER permit anyone to cross path of moving gate or door.

To prevent possible SERIOUS INJURY or DEATH, the use of

CONSTANT OPERATION on residential openers is PROHIBITED.

When a receiver is used to activate a commercial door opener, a

reversing edge MUST be installed on the bottom of the door. Failure to

install a reversing edge under these circumstances may result in

SERIOUS INJURY or DEATH to persons trapped beneath the door.

3-CHANNEL UNIVERSAL RECEIVER

MODELS 850LM AND 850LMC

APPLICATION

The receiver can be used as a single or three channel receiver to

control up to 3 gates or commercial door operators. The receiver can

also be used with a 3-button remote control to operate the OPEN,

CLOSE, and STOP feature on a commercial door operator. The receiver

is not for use with MyQ™ enabled garage door openers or devices.

Each channel is compatible with a certain number of remote controls and

keypads. Refer to the list below:

• CH1: 50 remote controls and 2 keypads

• CH2: 20 remote controls and 2 keypads

• CH3: 20 remote controls and 2 keypads

When the channel has reached full capacity for remote controls, all LEDs

will blink 3 times. When the channel has reached full capacity for

keypads, all LEDs will blink 4 times. Additional accessories can be

programmed, however, the newly programmed accessory will replace the

first programmed accessory.

WIRING

Refer to your commercial door operator or gate operator owner manual

or wiring diagrams for specific wiring information.

SINGLE CHANNEL

THREE CHANNEL

Receiver

Single Operator(s)

Receiver

Operator 1

Operator 2

Operator 3

CH1

CH2

CH3

LEDs

NOTE: The receiver will only allow you to program a button on the remote

control to one channel at a time. For example, if the button on the remote

control is already programmed to channel 1 and then is programmed to

channel 3, the button will be erased from channel 1 and will only work on

channel 3.

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Summary

Safety Warnings

Electrocution Hazard

Warning about preventing electrocution by ensuring power is disconnected before installation.

Moving Gate;Door Hazard

Warnings regarding preventing injury from moving gates or doors and operator use.

Constant Operation Hazard

Prohibits constant operation on residential openers; requires reversing edge for commercial.

Wiring Diagrams

Single Channel Wiring

Diagram showing wiring for a single channel operator connection.

Three Channel Wiring

Diagram illustrating wiring for three channel operator connections.

Installation and Features

Receiver and Antenna Installation

Steps for selecting a location, fastening the receiver, and connecting the antenna.

Power Connection and Operation Feature

Information on connecting power and a feature for closing doors/gates via wireless control.

Programming Instructions

Program Single Button Remote

Steps to program a single button remote control to a receiver channel.

Program 3-Button Remote

Steps to program OPEN, CLOSE, and STOP functions using a 3-button remote.

Erase Receiver Memory

Procedure to erase programmed remote controls from a specific channel.

Specifications and Support

Receiver Specifications

Lists technical specifications like contact rating, power, and RF frequency.

Compatible Accessories

Lists compatible remote controls, keypads, and antenna extension kits.

Compliance and Support Information

States FCC/IC compliance, restrictions, and provides the technical support number.