Chamberlain 1200 - Manual (Page 8)

Assembly Step 1
Attach the T-rail to the Opener
For Models 1260, 1260-266, 1255,1255-266,
1250, 1250-266, 1245, 1245-266 and 1240 To fasten rail, use only those screws mounted
in top of the opener. Any other screws will
cause serious damage to the opener.
8
USE ONLY THIS
TYPE AND SIZE
SCREW
Washered Screw
5/16"-18x1/2"
Opener
Sprocket
CAUTION
See page 9 for Models 1256 and 1246.
• Remove the two washered screws mounted in top
of opener
• Align T-rail at an angle with opener so one hole in
T-rail and opener line up.
• Thread one of the washered screws part way in.
Use only these screws! Use of any other screws
will cause serious damage to door opener.
• Align T-rail and styrofoam over opener sprocket.
Cut tape from T-rail, chain and styrofoam.
• REMOVE STYROFOAM.
Assembly Step 2
Attach Chain to Sprocket and
Install Sprocket Cover
For Models 1260, 1260-266, 1255,1255-266,
1250, 1250-266, 1245, 1245-266 and 1240
• Position chain over the opener sprocket. If
necessary, loosen the outer nut on the trolley to
obtain more chain slack.
• Insert the second washered screw.
CAUTION: Use only the screw previously
removed from opener!
• Tighten both screws securely through the T-rail
into the opener as shown.
Install the sprocket cover:
• Insert the back tab in the opener slot. Squeeze the
cover slightly and insert the front tab in the slot on
the mounting plate.
USE ONLY THIS
TYPE AND SIZE
SCREW
Washered Screw
5/16"-18x1/2"
Styrofoam
Chain
T-rail
Hole
Sprocket
Cover
Mounting
Plate
Front Tab Slot
Back Tab Slot
Top of Opener
Proceed to Assembly Step 3, page 11.
Serious injury can result if fingers become
entangled in moving opener sprocket. Attach
sprocket cover securely. Never operate opener
while your hand is near the opener sprocket.
WARNING