Chamberlain WHISPER DRIVE 248754 - Manual (Page 23)

23
MOUNTING AND WIRING THE SAFETY
REVERSING SENSORS
Mounting:
• Slide a 1/4"-20x1/2" carriage bolt head into the slot
on each sensor. Use wing nuts to fasten sensors to
brackets, with lenses pointing toward each other across
the door. Be sure the lens is not obstructed by a bracket
extension (Figure 5).
• Finger tighten the wing nuts.
Option A - Installation Without Pre-Wiring:
• Run the bell wire from both sensors to the garage
door opener. Attach the wire to the wall and ceiling
with the staples (Figure 6).
Option B - Pre-Wired Installation:
If your garage already has wires installed for the safety
reversing sensors, follow the instructions below:
• Cut the end of the safety sensor wire, making sure there
is enough wire to reach the pre-installed wires from the
wall (Figure 7).
• Separate the safety sensor wires and strip 7/16 inch
(11 mm) of insulation from each end. Choose two of
the pre-installed wires and strip 7/16 inch (11 mm) of
insulation from each end. Make sure that you choose
the same color pre-installed wires for each sensor
(Figure 8).
• Connect the pre-installed wires to the sensor wires with
wire nuts making sure the colors correspond for each
sensor (Figure 9).
Figure 5
Figure 6
Figure 7
Figure 9
Figure 8
Safety Reversing
Sensor Wires
Safety Reversing
Sensor Wires
White
White/Black
Not Provided
Pre-installed
wires
Carriage Bolt
1/4"-20x1/2"
Wing Nut
1/4"-20
Lens
Pre-Installed Wires
7/16"
(11 mm)
7/16"
(11 mm)