Installation; Installation Safety Instructions; Position The Operator - Chamberlain Liftmaster Security+ 3900PLD Owner's Manual

INSTALLATION

IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
1. READ AND FOLLOW ALL INSTALLATION WARNINGS AND
INSTRUCTIONS.
2. Install door operator ONLY on properly balanced and
lubricated door. An improperly balanced door may not
reverse when required and could result in SEVERE INJURY
or DEATH.
3. ALL repairs to cables, spring assemblies and other hardware
MUST be made by a trained door systems technician
BEFORE installing operator.
4. Disable ALL locks and remove ALL ropes connected to door
BEFORE installing operator to avoid entanglement.
5 Mount emergency release handle no higher than 6 feet
(1.83 m) above floor.
6. NEVER connect door operator to power source until
instructed to do so.
INSTALLATION STEP 1

Position the Operator

NOTE: For additional mounting options see
accessories page.
1. Close the door completely.
2. Slide the operator with collar over the end of the torsion
bar. Ensure that the collar does not touch the bearing
plate. Check to make sure the mounting bracket is
located on a solid surface such as wood, concrete or
door/flag bracket. Snug collar screws to help assure
proper alignment of operator. Mark the bracket holes. It
may be necessary to cut the torsion bar if it is too long
or damaged.
3. Loosen collar screws from torsion bar and remove the
operator. Drill 3/16" pilot holes at the marked locations.
Drill through steel plate if needed.
4. Reinstall the operator by sliding the collar over the
torsion bar until pilot holes align with bracket. Securely
tighten collar screws that attach to the torsion bar to
12-14 ft./lbs. of torque. Securely tighten both set screws
firmly, without damaging the motor unit.
5. Fasten bracket securely with 14-10x1-7/8" screws.
Tighten all mounting bracket hardware.
NOTE: The motor unit does not have to be flush to wall.
6. Use a staple to secure the antenna wire to prevent
antenna from being entangled in a door roller.
HARDWARE SHOWN ACTUAL SIZE
14-10x1-7/8" Hex Screw
WARNING
WARNING WARNING
7. NEVER wear watches, rings or loose clothing while installing
or servicing operator. They could be caught in door or
operator mechanisms.
8. Install wall-mounted door control:
• within sight of the door.
• out of reach of children at minimum height of 5 feet
(1.5 m).
• away from ALL moving parts of the door.
9. Install the entrapment warning placard next to the control
station in a prominent location.
10. Place manual release/safety reverse test label in plain view
on inside of door.
11. Upon completion of installation, test safety reversal system.
Door MUST reverse on contact with a 1-1/2" (3.8 cm) high
object (or a 2x4 laid flat) on the floor.
To prevent possible SERIOUS INJURY or DEATH:
• Concrete anchors MUST be used if mounting bracket into
masonry.
• NEVER try to loosen, move or adjust door, springs, cables,
pulleys, brackets or their hardware, ALL of which are under
EXTREME tension.
• ALWAYS call a trained door systems technician if door
binds, sticks or is out of balance. An unbalanced door might
not reverse when required.
• Operator MUST be mounted at a right angle to the torsion
bar to avoid premature wear on the collar.
Operator
Staple
7
Torsion Bar