Mullions - Hardware Accessories Dormakaba - Free user manual and instructions

Product Type	Mullion (vertical bar for double doors)
Brand	Dormakaba
Model	Mullions
Category	Hardware Accessories
Material	Metal (steel or aluminum alloy)
Installation Type	Surface mounted on door frame soffit and sill
Lock Cylinder Type	Mortise cylinder (DORMA supplied)
Fasteners	5/16-18 x 1-1/2 in. screws for top fitting; 12-24 x 3/4 in. screws for stabilizers
Drill Bit Sizes	"F" drill bit for top fitting holes; 3/4 in. drill bit for bottom fitting holes
Components Included	Top fitting, bottom fitting, mullion tube, stabilizers (4), screws, anchors
Fire Rated	Yes, stabilizers required for fire-rated installation
Functions	Secures double doors; removable with key rotation
Height Adjustment	Field-cut from bottom end; subtract 1 in. from floor-to-soffit height
Maintenance	Periodic check of screw tightness and cylinder operation
Cleaning	Wipe with damp cloth; avoid abrasive cleaners
Safety	Ensure mullion snaps firmly and is easily removable with key; for fire-rated doors, install all stabilizers
Spare Parts Availability	Contact Dormakaba for replacement cylinders, fittings, and screws
Repairability	User-serviceable: replace cylinder, adjust alignment, replace screws
Warranty	Refer to Dormakaba terms (not specified in manual)

Frequently Asked Questions - Mullions Dormakaba

How do I determine the correct mullion length?

Measure from the soffit to the finished floor, then subtract 1 inch. Cut the mullion tube from the bottom end (the end without the notch).

What tools are required for installation?

You will need an 'F' drill bit, a 3/4-inch drill bit, a screwdriver, a tape measure, a saw for cutting the mullion tube, and a key for the cylinder.

Can I use a different lock cylinder?

Yes, but you must refer to the cylinder and cam specifications provided in the manual. Using a non-DORMA cylinder may require adjustment of the cam orientation.

What is the purpose of the mullion stabilizers?

The stabilizers provide additional support and are required for fire-rated installations. They are attached to the doors using 12-24 x 3/4-inch screws.

How do I know if the mullion is properly installed?

The mullion should snap firmly into place at the top and bottom. When the key is turned 90 degrees, the latch should fully retract, allowing easy removal of the mullion.

What should I do if the mullion is too long after cutting?

Re-check your measurement. If already cut, you may need to order a new mullion tube. Always measure twice and cut once from the bottom end.

How do I maintain the mullion?

Periodically check that all screws are tight and the cylinder operates smoothly. Clean with a damp cloth and mild detergent; avoid abrasive cleaners that may damage the finish.

Is the mullion suitable for exterior doors?

The manual does not specify outdoor use. It is typically designed for interior commercial doors. For exterior applications, ensure the finish is weather-resistant and consult Dormakaba.

Can I install the mullion on a door with a threshold?

Yes, but you must cut out the threshold so that the bottom fitting rests directly on non-flammable flooring. A spacer or shim may be needed if the soffit width varies.

What do I do if the key does not turn smoothly?

Check that the cam is oriented correctly (pointing up at bottom) and that the set screws are not overtightened. Lubricate the cylinder with a dry graphite lubricant if needed.

USER MANUAL Mullions Dormakaba

Technical line drawing of a vertical metal frame with mounting holes and a small circular feature (no text or symbols)

INSTALLATION

Read the entire instruction sheet prior to installation.

1. Determine and mark the center of the width of the door opening at the soffit and at the sill. See illustration at right.
2. Place top fitting on soffit of frame. Align the centering notch in fitting with the mark you made on soffit. Close doors and butt the notched side of fitting to doors. Mark and drill (4 or 6) holes with "F" drill bit, tap holes for 5/16-18 screws. (Note: A shim may be required for front two (2) holes between fitting and stop.)

1. DORMA Mortise cylinder supplied with top fitting assembly. If using other then manufactures supplied cylinder, refer to cylinder and cam specifications below.

1. Install mortise cylinder into fitting as shown, cam at bottom pointing up. Tighten cylinder mounting set screws (2) securely & evenly. (Do not overtighten, as to crush housing.) Both should be flush with sides of the fitting. Insert key and rotate 90 degrees to right. The latch should retract fully.

Technical line drawing of a mechanical bracket with mounting holes and threaded component (no text or symbols)

1. Attach top fitting to soffit with (4 or 6) 5/16-18 x 1 - 1/2" screws.

Note: Due to not all soffit widths being the same; a spacer or shim may be required for additional support.

1. Trial fit the mullion. If there is a threshold, be sure to cut out threshold so that the bottom fitting is resting on non-flammable flooring.

2. If it is to long, measure distance from the soffit to the finished floor; subtract 1" to 1 116 " from this dimension. Mark mullion tube and cut from the bottom end (end with out notch).

$$ " H" - 1" = " C" $$

1. Place mullion tube into bottom fitting and pivot the top inward into place. Close doors. Slide bottom fitting forward until mullion tube is butted against doors. Align center of fitting with marks on sill from step 1.

Do Not Cut This End.

1. Carefully remove mullion. Mark and drill (2) 3/4" dia. holes 2 1/4" deep for bottom fitting.

2. Attach the bottom fitting with anchors and screws provided. Place mullion over bottom fitting and pivot top forward into place. The mullion should snap firmly into place. Ensure that the mullion is easily removable when the key is turned in its cylinder.

1. Install mullion stabilizers (4) on doors as shown using (8) 12-24 x 3/4" P.H.F.H. screws.

NOTE: STABILIZERS ARE REQUIRED ON FIRE RATED MULLIONS.