Chamberlain Merlin MT5580, Installation And Operation Instructions Manual

INSTALL THE HEADER BRACKET – 

A. Wall Mount: 

Center the bracket 

(2) 

on the vertical guideline

(1) 

with the bottom edge of the bracket on the horizontal line 

(6) 

(with the arrow

pointing toward the ceiling). Mark either set of bracket holes 

(4 or 5)

. 

Do not use the holes designated for ceiling mount. 

Drill 4,5mm (3/16")

pilot holes and fasten the bracket with wood screws 

(3)

.

B. Ceiling Mount: 

Extend vertical guideline 

(1) 

onto the ceiling. Center the bracket 

(2) 

on the vertical mark no more than 150mm (6") from the wall. 

Make sure the arrow is pointing toward the wall. Mark holes designated for ceiling mount only 

(4)

. Drill 4,5mm (3/16") pilot holes and fasten the 

bracket with wood screws 

(3)

. For concrete ceiling mount, use concrete anchors 

(7)

provided.

8

UP

CEILING MOUNT ONLY

UP

CEILING MO

UN

T ONL

Y

1

2

5cm

(2")

3

4

5

B

UP

150mm

  (6")        

UP

CEILING MOUNT ONLY

4

2

1

3

A

6

3

7

ATTACH T-RAIL TO HEADER BRACKET –

Position opener on garage floor below the header bracket. Use packing material to protect the cover.

Note: 

To enable the T-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. 

Raise T-rail until chain pulley and header brackets come together. Join with clevis

pin 

(1)

. Insert ring fastener 

(2) 

to secure.

9

1

2

2

1

7