Chamberlain 3840 Garage Door Opener User Manual


 
17
INSTALLATION STEP 9
Install the Lights
Press the release tabs on both sides of lens.
Gentlyrotate lens back and downward until the lens
hinge is in the fully open position. Do not remove the
lens.
Install a 100 watt maximum light bulb in each socket.
Light bulb size should be A19, standard neck only. The
lights will turn ON and remain lit for approximately 4-1/2
minutes when power is connected. Then the lights will
turn OFF.
Reverse the procedure to close the lens.
Use A19, standard neck garage door opener bulbs for
replacement.
NOTE: Use only standard light bulbs. The use of short
neck or speciality light bulbs may overheat the endpanel
or light socket.
Lens
Hinge
100 Watt (Max)
Standard Light Bulb
Release Tab
100 Watt (Max)
Standard Light Bulb
Mini-Twist 26 Watt
(100 W equivalent) (Max)
Fluorescent Light Bulb
or
Mini-Twist 26 Watt
(100 W equivalent) (Max)
Fluorescent Light Bulb
or
To prevent possible OVERHEATING of the endpanel or light
socket:
• Use ONLY A19 incandescent or mini-twist compact
fluorescent light bulbs.
• DO NOT use incandescent bulbs larger than 100W.
• DO NOT use compact fluorescent light bulbs larger than 26W
(100W equivalent).
• DO NOT use halogen bulbs.
• DO NOT use short neck or specialty light bulbs.
ALWAYS wear protective gloves and eye protection when
changing the battery or working around the battery
compartment.
INSTALLATION STEP 8
Install the Standby Power (Optional)
Make sure motor unit is unplugged.
Using a Phillips head screwdriver, remove the battery
cover on the motor unit.
Partially insert battery into motor unit with terminals
facing out.
Connect red (+) and black (-) wires from motor unit to
corresponding terminals on battery.
Replace battery cover.
Battery
Battery Cover
To prevent possible SERIOUS INJURY or DEATH from a falling
garage door:
• If possible, use emergency release handle to disengage
trolley ONLY when garage door is CLOSED. Weak or broken
springs or unbalanced door could result in an open door
falling rapidly and/or unexpectedly.
• NEVER use emergency release handle unless garage doorway
is clear of persons and obstructions.
• NEVER use handle to pull door open or closed. If rope knot
becomes untied, you could fall.
Trolley Release Arm
NOTICE
Overhand
Knot
Emergency
Release Handle
Trolley
INSTALLATION STEP 10
Attach the Emergency Release Rope
and Handle
Thread one end of the rope through the hole in the top
of the red handle so “NOTICE” reads right side up as
shown. Secure with an overhand knot at least
1" (2.5 cm) from the end of the rope to prevent slipping.
Thread the other end of the rope through the hole in the
release arm of the outer trolley.
Adjust rope length so the handle is 6 feet (1.83 m)
above the floor. Secure with an overhand knot.
NOTE: If it is necessary to cut the rope, heat seal the cut
end with a match or lighter to prevent unraveling.