Chamberlain 3453135556 manual Mounting the Operator

MOUNTING THE OPERATOR:

1.Getting Started.

•Position boom/power head assembly (Fig. 2-7).

–Boom strap leaning on wall next to header bracket.

–Place material on floor under power head to protect from scratching. (A box, stool, or similar device may be needed to clear a torsion spring, as shown.)

2.Mounting the assembly.

•Attach boom strap to header bracket using nut (47) (Fig. 2-7 inset). FINGER TIGHT ONLY.

[47]

5/16"-18

FIG. 2-7 Position assembly.

HEADER BRACKET

13

•Support power head on step-ladder.

NOTE: Before final attachment to ceiling, insure that assembly is in proper alignment (Fig. 2-9).

• Attach mounting straps to ceiling using lag

bolts (22) (Fig. 2-10).

• Set height of power head according to following:

– Track guided doors.

- Boom must clear door at highest point of

travel.

- Be level or, power head slightly below level.

90°

NO

YES

DOOR

VIEW FROM ABOVE

(not to scale)

NO

– Trackless doors.

- Boom must clear door at highest point of

travel by 1" to 1-1/2".

• Securely tighten power head mounting bolts (46)

and nuts (47).

• Lower door.

• Fully tighten boom strap nut.

• DO NOT PLUG UNIT IN YET!

3. Adjusting length of emergency release cord.

• Check release knob height.

– Low enough you can reach it.

– High enough to clear your vehicle, but

NO HIGHER THAN 6 FEET ABOVE FLOOR.

• Tie a new overhand knot where desired.

– Cut off any extra cord.

[22]

1/4" x 2"

[46][47]

5/16"-18 x 3/4" 5/16"-18

FIG. 2-9 Operator must be aligned.

ANGLE IRON ON FINISHED CEILING
	DRYWALL
Attach angle iron to beams
UNFINISHED OR OPEN BEAM
Extra framing	[22]
not needed
Mounting Straps
[22]
[46 & 47]	[46 & 47]
	Extra framing
	NEEDED

FIG. 2-10 Mounting the power head.