Install The Door Control - Chamberlain LiftMaster 3275C Owner's Manual

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 flat. 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 flat 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 fit.
• 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 red/white 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.
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.
HARDWARE SHOWN ACTUAL SIZE
Screw 6ABx1-1/4"
(standard installation)
Screw 6-32x1"
(pre-wired)
STANDARD
Figure 1 Figure 1
INSTALLATION
To Replace
Insert Bottom Tabs First
Figure 3
MULTI-FUNCTION
DOOR CONTROL (BACK)
Top Mounting Hole
Terminal
Screws
Bell Wire
Bottom Mounting Hole
Figure 5
9 1 9 1
7 3 7 3
5
5
KG
KG
13
Insulated
Staples
Drywall Anchors
PRE-WIRED
Figure 2
Figure 2
INSTALLATION
24 Volt
To Replace
2-Conductor
Insert Bottom Tabs First
Bell Wire in
Gang Box
Figure 4
Figure 4
REMOVE COVER
Door Control To release or insert wire,
Connections
push in tab with screwdriver tip
White
Red Grey
7/16"
Strip wire 7/16"