Chamberlain LiftMaster 398LM Owner's Instructions

WARNING

CAUTION
For use with LiftMaster 1300 & 3000 Series
Garage Door Openers.

Installation

Locate control console within sight of door, at a
minimum height of 5' (1.5 m) where small
children cannot reach, away from moving parts of door and
door hardware. If installing into drywall, drill 5/32" holes and
use the anchors provided. For pre-wired installations (as in
new home construction), it may be mounted to a single gang
box (Figure 1).
NOTE: The functional temperature range of the control
console is between -4° F (-20° C) and 122° F (50° C). Scroll
speed of display is slower at lower temperatures although
the control console remains fully functional.
CAUTION: Continuous exposure of the control console to
temperatures below -22° F (-30° C) may damage the LCD
screen.
SPECIAL NOTE: Only one 398LM can be connected to
each garage door opener. If additional wall controls are
desired to operate the same garage door opener, it is
recommended to use model 378LM wireless wall control
as the secondary control console.
1. Disconnect power to opener.
2. Strip 7/16" (11 mm) of insulation from one end of bell wire
and connect to the two screw terminals on back of control
console by color: white wire to the W (2) and white/red
wire to the R (1) (Figure 2).
3. Remove push bar cover by gently prying at the
lower/middle portion of the cover with a small flat-head
screwdriver. Fasten with 6AB x 1-1/4" self-tapping screws
(drywall installation) or 6-32 x 1" machine screws
(into gang box) as follows:
• Install bottom screw, allowing 1/8" (3 mm) to protrude
above wall surface.
• Position bottom of control console on screw head and
slide down to secure. Adjust screw for snug fit.
• Drill and install top screw with care to avoid cracking
plastic housing. Do NOT overtighten.
• Replace cover by inserting top tabs first and then snap
cover in place.
4. (For standard installations ONLY) 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.
5. Strip 7/16" (11 mm) of insulation from end of bell wire.
Connect bell wire to the quick-connect terminals on the
motor unit: white to white and white/red to red (Figure 2).
6. Reconnect power.
NOTE: If you have any trouble with the operation of the
buttons, loosen the top mounting screw.
LCD Motion Detecting Door Control Console
To prevent possible SERIOUS INJURY OR DEATH from
electrocution:
• Be sure power is NOT connected BEFORE installing door
control.
L O C
K
• Connect ONLY to 24 VOLT low voltage wires.
L I G
H T
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' (1.5 m), 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.
Figure 1
REMOVE & REPLACE COVER
To Replace Insert
Top Tabs First
Push Bar Cover
Figure 2
2-Conductor
Bell Wire
R
1
(BACK VIEW)
Strip wire 7/16"
1
Models 398LM & 398LMC
WARNING
OWNER'S INSTRUCTIONS
WARNING
PRE-WIRED INSTALLATION
LO CK
LIGHT
LO CK
LIGHT
Push Bar
Door
Control
Terminal
Screws
W
2 L O C
K
L O C
K
Lock
Button
Light
Button
Door Control To release wire, push in
Connections tab with screwdriver tip
7/16" (11 mm)
Red White Grey
24 Volt Bell Wire
Quick-Connect
Terminals
Antenna