Chamberlain 935C User Manual
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Model 935C
OWNER’S MANUAL
®
FOR USE WITH GARAGE DOOR OPENERS
MANUFACTURED AFTER JANUARY 1, 1995.
This door control contains a motion detector
that will automatically turn on the light when it
detects a person entering the garage. This
feature can be easily turned off for extended
work light use.
Locate the door control within sight of the door at
a minimum height of 5 feet (1.5 m) where small children
cannot reach, and away from moving parts of the door and
door hardware.
NOTE: After installation, an indicator light behind the cover
will indicate proper connection. If not lit, the Lock and Light
features will not function (reverse wires to correct).
INSTALLATION
The door control is typically attached directly to the wall. For
pre-wired installations (as in new home construction) it can
be mounted to a standard single gang box. See illustrations.
If installing the door control adjacent to existing door controls
be sure the detector switch is accessible.
1. Disconnect power to the garage door opener.
2. 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 2 and white/red wire to the 1.
3. Remove white cover by gently prying at slot in top of the
cover with a small flat head screwdriver. 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 top tabs and snap on cover.
OPENER TERMINAL SCREWS
AntennaOpener Panel
1
2
3
Push Bar
Light Button
Lock
Button
LOCK
LIGHT
Motion Detecting Control Panel
LOCK
LIGHT
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.
4. (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.
5. Strip 7/16" (11 mm) of insulation from end of bell wire. For
quick-connect terminals, connect bell wire as follows:
white to white and white/red to red. For opener terminal
screws, connect white to 2 and white/red to 1.
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, or
for terminal screws: attach white to 2 and white/red to 1.
The automatic light feature will become functional 1-1/2
minutes after power is restored.
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.
WARNING
CAUTION
WARNING
WARNING
To release wire,
push in tab with
screwdriver tip
QUICK-CONNECT TERMINALS
Red
Grey
White
7/16"
(11 mm)
Strip wire 7/16" (11 mm)
1
RED
2
WHITE
Door
Control
Terminal
Screws
24 Volt
Bell Wire
Back View
Bottom
Mounting
Hole
Top Mounting Hole
LOCK
LIGHT
To Replace
Insert Top
Tabs First
STANDARD WALL MOUNT
Detector
Switch
Push Bar Cover
ON
OFF
STANDARD WALL MOUNT
24 Volt
2-Conductor
Bell Wire
PRE-WIRED INSTALLATION
LO
CK
LIG
HT
To Replace
Insert Top
Tabs First
Detector
Switch
Push Bar Cover
ON
OFF
STANDARD WALL MOUNT
STANDARD WALL MOUNT
PRE-WIRED INSTALLATION