Chamberlain ATS 211X 1/2 HP - Manuel (Page 6)

6
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.
• Place the opener on packing material to protect
the cover.
• Remove the (2) 5/16"-18x1/2" washered bolts
mounted in the top of the 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 over sprocket. Cut tape from rail.
Chain
Spreader
Sprocket
Chain
USE ONLY THIS
TYPE AND SIZE
BOLT
Opener
Washered Bolt
5/16"-18x1/2"
Rail
To avoid SERIOUS damage to opener, ONLY use
bolts/fasteners mounted in top of motor unit.
WARNING
CAUTION WARNING
WARNING
ASSEMBLY STEP 2
Attach the Chain to the Sprocket
and Install the Rail Support Bracket
• Guide the chain over chain spreader and opener
sprocket. If necessary, loosen the outer nut on the
trolley to obtain more chain slack. Insert the second
washered bolt. Use only the bolts previously
removed from opener.
• Tighten both bolts securely through the rail into the
opener as shown.
• Position the rail support bracket on the opener.
• Attach the bracket to the rail with 1/4"-20x5/8"
hex screws and lock washers. Do not overtighten.
• Attach the bracket to the opener by inserting a
5/16"-18x1/2" washered bolt through a hole in each
side flange and a matching hole in the bracket.
Complete the connection by inserting the
#8-32x3/8" screw through the back flange and the
hole in rail support.
Proceed to Assembly Step 3.
To avoid possible SERIOUS INJURY to fingers from
moving garage door opener:
• ALWAYS keep hand clear of sprocket while operating
opener.
• Securely attach rail support bracket BEFORE operating.
WARNING
CAUTION WARNING
WARNING
Hex bolts
with Lock Washers
1/4"-20x5/8"
Rail Support
Bracket
Washered Bolt
5/16"-18x1/2"
Washered Bolt
5/16"-18x1/2"
Screw
#8-32x3/8"
Opener
Side Flange
Opener
Back Flange
Washered Bolt
5/16"-18x1/2" Hex Bolt
1/4"-20x5/8" Screw
#8-32x3/8" Lock Washer
HARDWARE SHOWN ACTUAL SIZE