Install the battery backup, Install the lights, Installation step 8 – Chamberlain WHISPER DRIVE 248754 User Manual
Page 18: Installation step 7

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INSTALLATION STEP 8
Install the Lights
• Press the release tabs on both sides of lens. Gently
rotate 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.
INSTALLATION STEP 7
Install the Battery Backup
• 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 the red (+) and black (-) wires from motor unit
to corresponding terminals on battery.
• Verify the battery wires are seated in the channel.
• Replace battery cover.
ALWAYS wear protective gloves and eye protection
when changing the battery or working around the
battery compartment.
To prevent possible OVERHEATING of the endpanel or
light socket:
• DO NOT use short neck or specialty light bulbs.
• DO NOT use halogen bulbs. Use ONLY
incandescent.
To prevent damage to the opener:
• DO NOT use bulbs larger than 100W.
• ONLY use A19 size bulbs.
Channel
Battery
Cover
100 Watt (Max)
Standard Light Bulb
100 Watt (Max)
Standard Light Bulb
Lens
Hinge
Release Tab
Battery