Chamberlain 3575C Hang the Opener

INSTALLATION STEP 5
Hang the Opener	To avoid possible SERIOUS INJURY from a falling garage door
Three representative installations are shown. Yours may	opener, fasten it SECURELY to structural supports of the
	garage. Concrete anchors MUST be used if installing any
be different. Hanging brackets should be angled (Figure 1)
	brackets into masonry.
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	Figure 1
fastening hardware are not provided.		Structural
1. Measure the distance from each side of the motor unit		Supports
to the structural support.		Lag Screws
2. Cut both pieces of the hanging bracket to required	Measure
		5/16"-18x1-7/8"
lengths.	Distance

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.	Bolt 5/16"-18x7/8"
5. Fasten the opener to the hanging brackets with 5/16"-
	Lock Washer 5/16"
18x7/8" hex bolts, lock washers and nuts.	Nut 5/16"-18
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).	Figure 2
7. Remove the 2x4. Operate the door manually. If the door		Hidden
hits the rail, raise the header bracket.	Bracket	Support
8. Grease the top and underside of the rail surface where		FINISHED CEILING
	(Not Provided)
the trolley slides with rail grease.		Lag Screws
NOTE: DO NOT connect power to opener at this time.
		5/16"-18x1-7/8"
		(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

HARDWARE SHOWN ACTUAL SIZE			Figure 3
			Lag Screws
			5/16"-18x1-7/8"	FINISHED CEILING
Lag Screw 5/16"-18x1-7/8"
				(Not Provided)
				Bolt 5/16"-18x7/8"
				Lock Washer 5/16"
				Nut 5/16"-18
Hex Bolt		Lock Washer 5/16"
5/16"-18x7/8"	Nut 5/16"-18
			Bolt 5/16"-18x7/8"
			Lock Washer 5/16"
			Nut 5/16"-18

12