Step 6 install the door control, Installation step 6, Install the door control – Chamberlain SECURITY+ 3265M-267 1/2 HP User Manual
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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
(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.
INSTALLATION STEP 6
Install the Door Control
Locate door control within sight of door at a minimum 
height of 5 feet (1.5 m) where small children cannot 
reach, and away from moving parts of door and door 
hardware. The installation surface must be smooth and 
fl at. If installing into drywall (Figure 1), drill 5/32" holes 
and use anchors provided. For pre-wired installations (as 
in new home construction), it may be mounted to a single 
gang box (Figure 2). NOTE: After installation, a green or 
amber indicator light behind the cover will indicate proper 
connection. If not lit, the Lock and Light features will not 
function (reverse wires to correct).
1. Strip 7/16" (11 mm) of insulation from one end of bell
wire and connect to the two screw terminals on back of 
door control by color: white wire to WHT and white/red 
wire to the RED (Figure 3).
2. Remove cover by gently prying at the side of the
cover with a small fl at head screwdriver (Figure 4). 
Fasten with 6ABx1-1/4" self-tapping screws (drywall 
installation) or 6-32x1" machine screws (into gang 
box) as follows:
• Drill and install bottom screw, allowing 1/8"(3 mm)
to protrude above wall surface.
• Position bottom of door control on screw head and
slide down to secure. Adjust screw for snug fi t.
• Install top screw with care to avoid cracking plastic
housing. DO NOT overtighten.
• Insert bottom tabs and snap on cover.
NOTE:
The push bar may stick if the door control is not
mounted on a smooth surface. If a click is not heard 
when pressing the push bar, loosen the two mounting 
screws or relocate the door control to a smoother 
surface.
3. (Standard installation 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 as 
follows: white to white and white/red to red (Figure 5).
NOTE:
When connecting multiple door controls to the
opener, twist same color wires together. Insert wires 
into quick-connect holes: white to white and white/red 
to red.
5. Use tacks or staples to permanently attach entrapment
warning label to wall near door control, and manual 
release/safety reverse test label in a prominent location 
on inside of garage door.
NOTE: DO NOT connect power and operate 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.
Figure 5
Figure 3
Figure 4
Figure 1
Figure 2
MULTI-FUNCTION DOOR 
CONTROL (BACK)
REMOVE COVER
To Replace
Insert Bottom
Tabs First
To Replace
Insert Bottom
Tabs First
Top Mounting Hole
Terminal Screws
To release or 
insert wire, 
push in tab with 
screwdriver tip
Red
Strip wire 7/16" (11 mm)
7/16"
White Grey
Door Control
Connections
Bell Wire
Bottom Mounting Hole
24 Volt 
2-Conductor
Bell Wire in 
Gang Box
STANDARD 
INSTALLATION
PRE-WIRED 
INSTALLATION
HARDWARE SHOWN ACTUAL SIZE
Screw 6ABx1-1/4"
(Standard Installation)
Drywall Anchors
Insulated Staples
Screw 6-32x1" (pre-wired)