Chamberlain 3800PC - Manuel (Page 16)

16
Floor Installation
1. Use wood blocks or extension
brackets (see Accessories) to
elevate sensor brackets so the
lenses will be no higher than 6"
(15 cm) above the fl oor.
2. Carefully measure and place right
and left assemblies at the same
distance out from the wall. Be sure
all door hardware obstructions are
cleared.
3. Fasten to the fl oor with concrete
anchors as shown.
Installation
Fasten Wood Block to Wall with
Lag Screws (not provided)
(Provided with
Extension Bracket)
Attach with
Concrete Anchors
(not provided)
Track Installation
1. Slip the curved arms over the
rounded edge of each door track,
with the curved arms facing the
door. Snap into place against the
side of the track. It should lie fl ush,
with the lip hugging the back edge
of the track, as shown.
If your door track will not support the
bracket securely, wall installation is
recommended.
1a 1c Wall Installation
1. Place the bracket against the
wall with curved arms facing the
door. Be sure there is enough
clearance for the sensor beam to be
unobstructed.
2. If additional depth is needed, an
extension bracket (see Accessories)
or wood blocks can be used.
3. Use bracket mounting holes as a
template to locate and drill (2) 3/16"
diameter pilot holes on the wall at
each side of the door, no higher
than 6" (15 cm) above the fl oor.
4. Attach brackets to wall with
lag screws (not provided).
If using extension brackets or wood
blocks, adjust right and left assemblies
to the same distance out from the
mounting surface. Make sure all door
hardware obstructions are cleared.
1b
INSTALLING THE BRACKETS
Be sure power to the opener is disconnected. Install and align the brackets so the safety reversing sensors will face each other across
the garage door, with the beam no higher than 6" (15 cm) above the fl oor. They may be installed in one of three ways, as follows.
Door Track
Safety Reversing
Sensor Bracket
Safety Reversing
Sensor Bracket
Lag Screws
(not provided)
Extension Bracket
(See Accessories)
Safety Reversing
Sensor Bracket
(Provided with
Extension Bracket)
Safety Reversing
Sensor Bracket