Mount the battery backup unit (bbu) (not provided), Installation step 8 – Chamberlain 3800P User Manual

Page 13

INSTALLATION STEP 8

Mount the Battery Backup Unit (BBU)
(not provided)

If the optional 475LM battery backup unit is part of this
installation it should be installed at this time.

• The BBU can be mounted to either the ceiling or a wall

within 3' (.9 m) of the motor unit.

• Position the BBU as desired to a structural support

(ceiling joist or wall stud).

• Attach the BBU to the support using the mounting holes

on either side of the BBU.

• Secure the BBU using the 1-1/2" lag screws (2) provided

with the BBU unit.

• Connect the BBU cord into the connector on the bottom

of the motor unit.

• Follow all instructions included with the 475LM unit to

test for proper operation and testing of the BBU.

BBU Cord

Connector

475LM Battery
Backup Unit