Chamberlain 3850 Garage Door Opener User Manual


 
Strip wire 7/16" (11 mm)
Red GreyWhite
To release wire, push in
tab with screwdriver tip
Control Console Connections
7/16" (11 mm)
13
INSTALLATION STEP 6
Install the Control Console
Drywall Anchors
Insulated
Staples
Screw 6ABx1-1/4"
(std installation)
Screw 6-32x1"
(pre-wired)
HARDWARE SHOWN ACTUAL SIZE
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.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).
2.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.
3.(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.
4.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).
NOTE: If you have any trouble with the operation of the
buttons, loosen the top mounting screw.
NOTE: DO NOT connect power and operate the opener
at this time.The trolley will travel to the full open position
but will not return to the close position until the sensor
beam is connected and properly aligned.
Push Bar
Light
Button
Lock
Button
Door
Control
Terminal
Screws
(BACK VIEW)
W
2
R
1
2-Conductor
Bell Wire
L
O
C
K
L
O
C
K
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' (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.
WARNING
CAUTION
WARNING
WARNING
PRE-WIRED INSTALLATION
REMOVE & REPLACE COVER
To Replace Insert
Top Tabs First
Push Bar Cover
24 Volt Bell Wire
LOCK
L
I
G
HT
LOCK
L
I
G
HT
Figure 2
Figure 1