Assembly; Attach The Rail To The Motor Unit; Attach The Chain To The Sprocket And Install; The Motor Unit - Chamberlain Security+ 3290 Owner's Manual

ASSEMBLY STEP 1

Attach the Rail to the Motor Unit

To avoid installation difficulties, do not run the garage door
opener until instructed to do so.
• Remove the two washered bolts mounted in top of motor unit.
• Position rail at a 45° angle to opener so one hole in rail and
motor unit line up.
• Thread one of the washered bolts part way in.
Use only these bolts! Use of any other bolts will cause serious
damage to door opener.
• Align rail and styrofoam over sprocket. Cut tape from rail,
chain and styrofoam.
• REMOVE STYROFOAM.
ASSEMBLY STEP 2
Attach the Chain to the Sprocket and Install the
Sprocket Cover
• Position chain over the sprocket. If necessary, loosen the outer
nut on the trolley to obtain more chain slack.
• Insert the second washered bolt. CAUTION: Use only the bolt
previously removed from motor unit!
• Tighten both bolts securely through the rail into the motor unit
as shown.
• Install the sprocket cover: Insert the back tab in the slot.
Squeeze the cover slightly and insert the front tab in the slot on
the mounting plate. Attach with #8x3/8" hex screws provided.
HARDWARE SHOWN
ACTUAL SIZE
Hex Screw
#8x3/8"
To avoid SERIOUS damage to opener, ONLY use bolts
mounted in top of motor unit.
USE ONLY THIS
TYPE AND SIZE
BOLT
To avoid possible SERIOUS INJURY to fingers from moving
garage door opener:
• ALWAYS keep hand clear of sprocket while operating
opener.
• Securely attach sprocket cover BEFORE operating.
#8x3/8" Hex Screws
6
Washered Bolt
5/16"-18x1/2"
Styrofoam
Rail Hole
Rail Hole
Sprocket Cover
Chain Sprocket