Sigma ML750 instruction manual Install the Header Bracket, Attach Rail to Header Bracket

Models: ML750

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Install the Header Bracket

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50mm

 

 

 

(2")

 

 

 

A

 

 

 

 

 

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150mm

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(6")

 

 

 

 

 

 

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B

 

 

 

Install the Header Bracket

NOTE: Refer to vertical center and horizontal lines created in step 12 for proper placement of header bracket.

A. Wall Mount: Center the header bracket (1) on the vertical center line (2) with the bottom edge of the header bracket on the horizontal line (4) (with the arrow pointing toward the ceiling). Mark all of the header bracket holes (5). Drill

4.5 mm (3/16") pilot holes and fasten the header bracket with wood screws (3).

B.Ceiling Mount: Extend vertical center line (2) onto the ceiling. Center the header bracket (1) on the vertical mark no more than 150 mm (6") from the wall. Make sure the arrow is pointing toward the opener. Mark all of the header bracket holes (5). Drill 4.5 mm (3/16") pilot holes and fasten the header bracket with wood screws (3). For concrete ceiling mount, use concrete anchors (6) provided

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Attach Rail to Header Bracket

Position opener on garage floor below the header bracket. Use packing material to protect the cover. Raise rail until holes in the header sleeve and holes in the header bracket align. Join with clevis pin (1). Insert ring fastener (2) to secure.

NOTE: To enable the rail to clear sectional door springs, it may be necessary to lift opener onto a temporary support. The opener must either be secured to a support or held firmly in place by another person.

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Sigma ML750 instruction manual Install the Header Bracket, Attach Rail to Header Bracket