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Protecting Steel Doors with Recessed Top

Edwards Signaling 10/2/2018
Protecting Steel Doors with Recessed Top

APPLICATION 1

Recess of 1/2" to 3/4"

Some steel doors are recessed at the top, creating a large gap which must be overcome when using a concealed magnetic contact. This page and the next two pages give three methods for solving this problem. The different methods are for different size recesses. The first method uses a regular switch with a door recess of 1/2" to 3/4" (1.27 cm to 1.9 cm).

Caution: Consult factory for installations on steel doors without recessed tops.

INSTALLATION

Make sure recess is 1/2" to 3/4" deep.

Carefully align position for Sentrol switch and magnet.

Drill hole for Interlogix switch in door frame - 11/16" (1.75 cm) for 1078CW, 15/16" (2.38 cm) for 1078W.

Drill hole for magnet in top of door 9/16" (1.43 cm) for 1078CW, 5/8" (1.59 cm) for 1078W.

Wire switch to loop and insert in frame.

Clean top of door and mount magnet in hole. Hold in place with tape. Close door and test circuit.

Use RTV or epoxy to glue magnet in place.

Retest.

RECOMMENDED PRODUCTS

Protecting Steel Doors with Recessed Top

APPLICATION 2

Recess of 1/4" to 1/2"

The second method for protecting steel doors with recessed tops involves using a regular switch with a door recess of 1/4" to 1/2"(0.635 cm to 1.27 cm).
Caution: Consult factory for installations on steel doors without recessed tops.

INSTALLATION

Make sure recess is 1/4" to 1/2" deep.

Carefully align position for switch and magnet.

Drill hole for switch in door frame - 11/16" (1.75 cm) for 1078CW, 15/16" (2.38 cm) for 1078W.

Wire switch to loop and insert in frame.

Clean top of door and mount magnet using tape. Close door and test circuit. Using RTV or epoxy, glue magnet in place.

Retest.

RECOMMENDED PRODUCTS

Protecting Steel Doors with Recessed Top

APPLICATION 3

Recess of 3/4" or more

The third method for protecting steel doors with recessed tops uses a regular switch with a door recess of 3/4" (1.9 cm) or more.

Caution: Consult factory for installations on steel doors without recessed tops.

INSTALLATION

Make sure recess is at least 3/4" (1.9 cm) deep.

Glue wood block in top of door. The thickness of the block should leave 5/8" (1.59 cm) to the top of the door.

Carefully align position for switch and magnet. The end of the magnet must be centered on the switch as shown.

Drill hole for switch in door frame - 11/16" (1.75 cm) for 1078CW, 15/16" (2.38 cm) for 1078W.

Wire switch to loop and insert in frame.

Drill hole for magnet - 9/16" (1.43 cm) for 1078CW, 5/8" (1.59 cm) for 1078W. Wire switch to loop and insert in frame.

Using RTV or epoxy, glue magnet in place.

Retest.

RECOMMENDED PRODUCTS

1078CW (wide gap up to 3/4" (1.9 cm)); 1078W (wide gap up to 1" (2.54 cm)), RTV 1905

Protecting Steel Doors with Recessed Top