Chamberlain 3245M 1/3 HP, 3255-2M 1/2 HP, 3255M 1/2 HP owner manual Install the Door Control

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 side 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.

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"	Insulated Staples
(standard installation)
Screw 6-32x1"(pre-wired)	Drywall Anchors

• 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

Figure 1	STANDARD
	INSTALLATION

LOCK

LIGHT

Figure 2 PRE-WIRED INSTALLATION

LOCK

LIGHT

secure wire in several places. Do not pierce wire with a

To Replace

To Replace

24 Volt Bell Wire

staple, creating a short or open circuit.

Insert Bottom Tabs First

Insert Bottom Tabs First

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.

Figure 3 DOOR CONTROL (BACK)	Figure 4
MULTI-FUNCTION		REMOVE COVER
	Slot
Top Mounting Hole
Terminal
Screws
		LOCK
Bell Wire		LIGHT
Bottom Mounting Hole

NOTE: DO NOT connect power and operate opener at

this time. The trolley will travel to the full open position but Figure 5 will not return to the close position until the sensor beam

is connected and properly aligned.

13

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

Red White Grey

7/16" (11 mm)

Strip wire 7/16" (11 mm)