Chamberlain ATS 211X 1/2 HP - Manuel (Page 11)

11
INSTALLATION STEP 4
Position the Opener
SECTIONAL DOOR ONLY
A 2x4 laid flat is convenient for setting an ideal
door-to-rail distance.
• Remove foam packaging.
• Raise the opener onto a stepladder. You will need
help at this point if the ladder is not tall enough.
• Open the door all the way and place a 2x4 laid flat
on the top section beneath the rail.
Trolley
Release Arm
ENGAGED RELEASED
To prevent damage to garage door, rest garage door
opener rail on 2x4 placed on top section of door.
WARNING
CAUTION WARNING
WARNING
• If the top section or panel hits the trolley when you
raise the door, pull down on the trolley release arm
to disconnect inner and outer sections. Slide the
outer trolley toward the motor unit. The trolley can
remain disconnected until Installation Step 12
is completed.
Rail
2x4 is used to determine
the correct mounting height
from the ceiling Door
INSTALLATION STEP 5
Hang the Opener
Two representative installations are shown. Yours
may be different. Hanging brackets should be angled
(Figure 1) to provide rigid support. On finished
ceilings (Figure 2), attach a sturdy metal bracket to
structural supports before installing the opener. This
bracket and fastening hardware are not provided.
1. Measure the distance from each side of the motor
unit to the structural support.
2. Cut both pieces of the hanging bracket to required
lengths.
3. Drill 3/16" pilot holes in the structural supports.
4. Attach one end of each bracket to a support with
5/16"-18x1-7/8" lag screws.
5. Fasten the opener to the hanging brackets with
5/16"-18x7/8" hex bolts, lock washers and nuts.
6. Check to make sure the rail is centered over the
door (or in line with the header bracket if the
bracket is not centered above the door).
7. Remove the 2x4. Operate the door manually. If the
door hits the rail, raise the header bracket.
8. Grease the top and underside of the rail surface
where the trolley slides with rail grease.
To avoid possible SERIOUS INJURY from a falling garage
door opener, fasten it SECURELY to structural supports of
the garage. Concrete anchors MUST be used if installing
any brackets into masonry.
Lag Screw 5/16"-18x1-7/8"
Hex Bolt
5/16"-18x7/8"
Nut 5/16"-18 Lock Washer 5/16"
HARDWARE SHOWN ACTUAL SIZE
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Measure
Distance
Lag Screws
5/16"-18x1-7/8"
Structural
Supports
Lag Screws
5/16"-18x1-7/8"
Bracket
(Not Provided)
FINISHED CEILING
(Not Provided)
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Hidden Support
Figure 1
Figure 2
WARNING
CAUTION WARNING
WARNING