Master Lock ATS 211 4

Before you begin, survey your garage area. Do any of the following conditions apply to you?

Horizontal and vertical reinforcement is needed for lightweight garage doors

(fiberglass, steel, aluminum, door with glass panels, etc.).

See page 19 for details.

FINISHED CEILING Support bracket & fastening hardware is required.

See page 12.

Slack in chain tension

is normal when

garage door is closed.

Header Wall

— — —

Door Center

— — —

Extension Spring

Torsion Spring

Access Door

— —

Safety

Reversing

Sensor

Floor must be level across width of door

Safety Reversing Sensor

Based on your particular requirements, there are several installation steps which might call for materials and/or hardware not included in the carton.

•Step 1, page 8 - Look at the wall or ceiling above the garage door. The header bracket must be securely fastened to structural supports.

•Step 5, page 12 - Do you have a finished ceiling in your garage? If so, a support bracket and additional fastening hardware may be required.

•Safety reversing sensor, page 16 - Depending upon garage construction, wood blocks may need to be fastened to mounting locations before sensors are installed.

•Step 10, page 17 - Alternate floor mounting of the safety reversing sensor will require hardware not provided.

•Step 11, page 19 - Do you have a steel, aluminum, fiberglass or glass panel door? If so, horizontal and vertical reinforcement is required.

•Look at the garage door where it meets the floor. It must close on the floor all the way across. Other- wise, the safety reverse system may not work properly. See page 23. Floor or door should be repaired.

•If your door is more than 7 feet high, see longer rails available on page 30.

Closed Position

Header Chain Pulley

Bracket Bracket

Chain	Trolley	Rail

Garage

Door

Spring

	Manual
Straight	Release
Straight	Rope & Handle
Door
Arm

		Curved
	Header	Door
	Header	Arm
	Wall	Arm
	Wall	Door Bracket
		Door Bracket
	Garage
	Door

•The opener can be installed within 2 feet to the left or right of the door center if there is a torsion spring or center bearing plate in the way of the header bracket or door bracket area. If your door has extension springs, the opener must be installed in the center of the door. See pages 8 and 19.

Do you have an access door in addition to the garage door? If not, Model 1702 Outside Quick Release is required. See page 30.

You may find it helpful to refer back to this page as you proceed with the installation of your opener.