Chamberlain MotorLift ML500, Instruction Manual

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Find Center of Garage
Mark center of door (1). Extend line onto ceiling
(2).
7
INSTALLATION SECTION
Wear protective goggles when working overhead to
protect your eyes from injury.Disengage all existing
garage door locks to avoid damage to garage door. To
avoid serious personal injury from entanglement,
remove all ropes connected to garage door before
installing opener. Installation of this product shall
comply with ZH1/494, VDE 0700 Part 238, and VDE
0700 Part 1. It is recommended that the opener be
installed 2.1m (7 feet) or more above the floor where
space permits.
Attach Rail to Unit
Turn Rail assembly over. Wrap Chain around Drive Sprocket (1). Slide Rail assembly (2) toward unit and into slots
on top of unit. Attach C-Bracket (3) on the rail and secure with screws (4) as shown Push Cable Pulley Bracket
forward making Chain tight on sprocket. Chain MUST engage teeth on Drive Sprocket.
Attach Header Bracket
Turn Rail and Unit assembly over. Slide Cable Pulley Bracket (2) toward front end of Rail (3). Be careful Chain does not
come off Drive Sprocket on unit or become twisted. Slide Carriage Bolt (5) into Header Bracket (1). Secure with Lock
Nut (4) behind wash (6). Tighten Nut until Chain does not droop below rail. Do NOT over tighten.