Chamberlain 3800 - Manual (Page 7)

7
INSTALLATION
INSTALLATION STEP 1
Position the Opener
1. Close the garage door completely.
2. Slide the opener with collar over the end of the torsion
bar. Check to make sure 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
opener. Drill 3/16" pilot holes at the marked locations.
Drill through steel plate if needed.
4. Reinstall the opener 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 jackshaft.
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.
To prevent possible SERIOUS INJURY or DEATH:
• Concrete anchors MUST be used if mounting bracket into
masonry.
• NEVER try to loosen, move or adjust garage door, springs,
cables, pulleys, brackets or their hardware, ALL of which
are under EXTREME tension.
• ALWAYS call a trained door systems technician if garage
door binds, sticks or is out of balance. An unbalanced
garage 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.
Motor unit
Staple
Torsion Bar
WARNING
CAUTION WARNING
WARNING
14-10x1-7/8" Hex Screw
HARDWARE SHOWN ACTUAL SIZE
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
WARNING
WARNING
WARNING
1. READ AND FOLLOW ALL INSTALLATION WARNINGS AND
INSTRUCTIONS.
2. Install garage door opener ONLY on properly balanced and
lubricated garage 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 opener.
4. Disable ALL locks and remove ALL ropes connected to
garage door BEFORE installing opener to avoid
entanglement.
5 Mount emergency release handle no higher than 6 feet
(1.83 m) above floor.
6. NEVER connect garage door opener to power source until
instructed to do so.
7. NEVER wear watches, rings or loose clothing while
installing or servicing opener. They could be caught in
garage door or opener mechanisms.
8. Install wall-mounted garage door control:
• within sight of the garage door.
• out of reach of children at minimum height of 5 feet
(1.5 m).
• away from ALL moving parts of the door.
9. Place entrapment warning label on wall next to garage door
control.
10. Place manual release/safety reverse test label in plain view
on inside of garage 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.