Chamberlain Security+ 3950 Owner's Manual page 11

INSTALLING THE BRACKETS
Be sure power to the operator is disconnected. Install and align
the brackets so the safety reversing sensors will face each other
across the door, with the beam no higher than 6" (15 cm) above
the floor. They may be installed in one of three ways, as follows.
Wall installation (Figures 1 and 2):
• 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.
• If additional depth is needed, an extension bracket
(see accessories) or wood blocks can be used.
• 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 floor.
• 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.
Floor installation (Figure 3):
• 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 floor.
• Carefully measure and place right and left assemblies at the
same distance out from the wall. Be sure all door hardware
obstructions are cleared.
• Fasten to the floor with concrete anchors as shown.
Figure 1
Figure 2
(Provided with
Extension
Bracket)
Figure 3
11
WALL MOUNT (RIGHT SIDE)
Fasten Wood Block to Wall with
Lag Screws (Not Provided)
Indicator
Light
Sensor
Bracket
Lag Screws
(Not Provided)
Lens
WALL MOUNT (RIGHT SIDE)
Extension Bracket
(See Accessories)
(Provided with
Extension Bracket)
Sensor
Bracket
Indicator
Lens Light
FLOOR MOUNT (RIGHT SIDE)
Attach with
Concrete Anchors
(Not Provided)
Lens
Indicator
Light
Sensor
Bracket