Chamberlain 3850PC Manuale Utente

INSTALLATION STEP 5

Hang the Opener

Three representative installations are shown. Yours may
be different. Hanging brackets should be angled
(Figure 1) to provide rigid support. On finished ceilings
(Figure 2 and Figure 3), attach a sturdy metal bracket to
structural supports before installing the opener. This
bracket and fastening hardware are not provided.

1. Remove foam packaging. 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.

NOTE: DO NOT connect power to opener at this time.

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.

Hex Bolt
5/16"-18x7/8"

Nut 5/16"-18

Lock Washer 5/16"

Lag Screw 5/16"-9x1-5/8"

HARDWARE SHOWN ACTUAL SIZE

Measure
Distance

Lag Screws
5/16"-18x1-7/8"

Structural
Supports

Bracket
(Not Provided)

Lag Screws
5/16"-18x1-7/8"

(Not Provided)
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18

— FINISHED CEILING —

Hidden
Support

Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18

Lag Screws
5/16"-18x1-7/8"

(Not Provided)
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18

FINISHED CEILING

Figure 1

Figure 2

Figure 3