Sears 139.18847 - Manual (Page 23)

Invisible Light Beam
Protection Area
Sensor
Sensor
Connect Wire to
Opener Terminals
Attaching Sensor to "C" Wrap and Wires to Operator
11/14/91 - 1/15/92
Bell Wire
Bell Wire
Finished
Ceiling
OPENER TERMINAL SCREWS
Sensor
Connections
Door Control
Connections
(dotted line)
1 2 3
• Center each sensor unit in a "C" wrap with lenses
pointing toward each other across the door (see
Figure 6).
• Secure sensors with the hardware shown. Finger
tighten the wing nut on the receiving eye to allow
for final adjustment. Securely tighten the sending
eye wing nut.
• Run the wires from both sensors to the opener.
Use insulated staples to secure wire to wall and
ceiling.
• Strip 1/4" of insulation from each set of wires.
Separate white and white/black wires sufficiently to
connect to the opener terminal screws: white to 2
and white/black to 3.
Aligning the Safety Sensors
• Plug in the opener. Green indicator lights in both
the sending and receiving eyes will glow steadily if
wiring connections and alignment are correct.
The sending eye indicator light will glow regardless
of alignment or obstruction. If the indicator light is
off, dim, or flickering in the
receiving eye (and the
invisible light beam path is not obstructed),
alignment is required.
• Loosen the sending eye wing nut and re-adjust,
aiming directly at the receiving eye. Lock in place.
• Loosen the receiving eye wing nut and adjust
sensor vertically and/or horizontally until it receives
the sender’s beam. When the green indicator light
glows steadily, tighten the wing nut.
23
1/4-20 x 1-1/2"
Hex Bolt
"C" Wrap
Sensor
with Wire
Wing
Nut
Indicator
Light
1/4-20x1-1/2"
Hex Bolt
Wing Nut
Vis à tête hexagonale
de 1/4-20x1-1/2 po
Écrou à oreilles
Hardware Shown Actual Size
Figure 7
Figure 6
Trouble Shooting
1. If the sending eye indicator light does not glow
steadily after installation, check for:
• Electric power to the opener.
• A short in the white or white/black wires. These
can occur under staples or at screw terminal
connections.
• Incorrect wiring between sensors and opener.
• An open wire (wire break).
2. If the sending eye indicator light glows steadily but
the receiving eye indicator light doesn't:
• Check alignment.
• Check for an open wire to the receiving eye.
3. If the receiving eye indicator light is dim, realign
either sensor.
NOTE: When the invisible beam path is obstructed or
misaligned while the door is closing, the door will
reverse. If the door is already open, it will not close.
The opener lights will flash 10 times. (If bulbs are not
installed, 10 clicks are audible.) See page 21.