Chamberlain 3280M-267 1/2HP Owner'S Manual Download

Page: 12 / 36

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 slot in the top 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.

(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

Top Mounting Hole

Terminal Screws

To release or insert
wire, push in tab
with screwdriver tip

Red