Chamberlain 902LM - User Manual

To prevent possible SERIOUS INJURY or DEATH from electrocution:
• Be sure power is not connected BEFORE installing door control.
• Connect ONLY to 24 VOLT low voltage wires.
To prevent possible SERIOUS INJURY or DEATH from a closing
garage door:
• Install door control within sight of garage door, out of reach of
children at a minimum height of 5 feet, and away from all moving
parts of door.
• NEVER permit children to operate or play with door control push
buttons or remote control transmitters.
• Activate door ONLY when it can be seen clearly, is properly
adjusted, and there are no obstructions to door travel.
• ALWAYS keep garage door in sight until completely closed.
NEVER permit anyone to cross path of closing garage door.
MODELS • 902LM • 903LM
OWNERS INSTRUCTIONS
The two and three garage door multi-function control
panel is designed to replace multiple door control buttons
on LiftMaster Security✚ garage door openers. It can be
used as a replacement stand alone unit or in conjunction
with the original factory door control buttons. Never
connect more than two control panels or door control
buttons to any one garage door opener.
INSTALLATION
Product may be mounted directly to wall board or, for pre-wired
installations (as in new home construction), it may be mounted
to a single gang box. In either case the installation surface
must be smooth and flat.
The door orientation goes from left to right, and wiring is as
follows:
• Left Door – Door A
Wire white wire to White-1 and red/white wire to Red-1
• Middle Door – Door B
Wire white wire to White-2 and red/white wire to Red-2
Note: Model 902 LM will only have A and C terminals.
• Right Door – Door C
Wire white wire to White-3 and red/white wire to Red-3
NOTE: If replacing existing wall controls, labeling the existing
wires with masking tape might be helpful (i.e. Door A, Door B,
Door C).
1. Prior to installation, remove all door control buttons, and the
center panel on model 902LM.
2. Strip 7/16" of insulation from one end of bell wire and
connect to the corresponding two screw terminal on back of
door control by color. Figure 1. White to WHITE and
red/white to RED. Be careful to wrap the exposed wire
tightly around the screw and tighten. The exposed wire
must not come into contact with exposed solder points. The
Mylar insulator is there to prevent this from happening. Do
not remove this insulator.
3. Run bell wire up wall and across ceiling to motor unit. Use
insulated staples to secure wire in several places. Do not
pierce wire with a staple, creating a short or open circuit.
4. Strip 7/16" of insulation from opposite end of bell wire.
Connect bell wire to the Quick-Connect™ terminals located
on garage door opener as follows: white to white and
white/red to red. Figure 5.
NOTE: The door control button may stick if the door control is
not mounted on a smooth surface. If a click is not heard when
pressing the door control button, loosen the two mounting
screws or relocate the door control to a smoother surface.
After installation, an orange indicator light behind the door
control buttons will indicate proper connection. If not lit, the Lock
and Light features will not function (reverse wires to correct).
Quick-Connect™ Terminals
Multi-Function
Door Control Panel
Door Control
Button
Light Button
Lock
Button
Door
Control
Button
WARNING
CAUTION
WARNING
WARNING
2-Conductor
Bell Wire
Terminal
Screws
Terminal
Screws
Bottom Mounting
Holes
Figure 1
902LM
2-Conductor
Bell Wire
Terminal
Screws
Terminal
Screws
Terminal
Screws
Bottom Mounting
Holes
903LM
Gently
Twist
Top
Figure 2

Summary

Safety Precautions

Electrocution Hazard

Ensure power is disconnected before installation and connect only to 24V low voltage wires.

Garage Door Operation Hazard

Install door control within sight, out of reach of children, and away from moving parts for safe operation.

Installation Instructions

Wiring Door Controls

Details wiring for left (A), middle (B), and right (C) doors using color-coded wires and terminals.

Installation Procedure

Steps for wire stripping, connecting to the control panel and opener, and securing the wire.

Mounting and Functionality Checks

Guidance on smooth mounting, ensuring button response, and verifying the indicator light.

Mounting Options

Drywall Mounting

Instructions for mounting the control panel to wall board using screws and anchors.

Single Gang Box Mounting

Procedure for mounting the control panel over a single electrical gang box.

Using the Door Control

Door Operation

How to press the button to open, close, or reverse the garage door.

Light Feature

Instructions for operating the opener light and adjusting its auto-off timer.

Lock Feature

How to activate and deactivate the lock feature to prevent remote operation.

Chamberlain 902LM Specifications

General

Type	Remote Control
Number of Buttons	1
Color	Black
Remote Control	Yes
Security	Rolling code technology
Wi-Fi Capable	No
Compatibility	Chamberlain and LiftMaster garage door openers
Battery	Lithium battery (included)
Battery Backup	No
Warranty	1 year