Chamberlain LiftMaster Professional RDO800 Series Installation And Operating Instructions Manual page 6

5
Prepare Opener
For left hand side installations
the wire jumper should be removed.
Attaching the Extension Poles (if required)
1. Insert the extension poles into the gear
2. Align the extension pole holes with the gear holes
3. Using the supplied screws secure the extension poles
Place the Opener in Manual Release mode.
Pull the release cord down and across to engage the
ball into the cup.
The drive forks should now be able to be moved
manually.
NOTE: To re-engage the opener, pull the release cord
across and up.
Set Opener Position (Left or Right hand)
3
For right hand side installations
the wire jumper should be in place
(factory installed).
.
Engaged
Operation Mode
Disengaged
Manual Release Mode