Chamberlain LiftMaster Security + 3270 1/2 HP Manuel D'instructions page 7

ASSEMBLY STEP 3
Attach the Belt Cap Retainer
1. Position the belt cap retainer over the motor unit
sprocket so the two holes in cap align with the two
holes in mounting plate. Attach with 8x3/8" hex screws
provided.
You have now fi nished assembling your garage door
opener. Please read the following warnings before
proceeding to the installation section.
HARDWARE SHOWN
ACTUAL SIZE
INSTALLATION
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
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. Install garage door opener 7 feet (2.13 m) or more
above fl oor.
6. Mount the emergency release within reach, but at
least 6 feet (1.83 m) above the fl oor and avoiding
contact with vehicles to avoid accidental release.
7. NEVER connect garage door opener to power source
until instructed to do so.
WARNING
Hex Screw
#8x3/8"
WARNING
To avoid possible SERIOUS INJURY to fi ngers from
moving garage door opener:
• ALWAYS keep hand clear of sprocket while
operating opener.
• Securely attach sprocket cover BEFORE operating.
Hex Screws 8x3/8"
Hex Screws 8x3/8"
WARNING WARNING
8. NEVER wear watches, rings or loose clothing
while installing or servicing opener. They could be
caught in garage door or opener mechanisms.
9. 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.
10. Place entrapment warning label on wall next to
garage door control.
11. Place manual release/safety reverse test label in
plain view on inside of garage door.
12. 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 fl at) on
the fl oor.
7
Belt Cap
Belt Cap
Retainer
Retainer
Motor Unit
Motor Unit
Sprocket
Sprocket
Mounting
Plate