Securitron iEXD-24 - Manual (Page 6)

PN# 500-18900
Page 6
Rev. D, 10/07
Then allow the door to fully close (this will capture the template). You can then accurately
punch your mounting holes for the strike plate/permanent magnet bracket just as if the blade
stop was not present.
To mark the holes for the sub-plate, you will use the other half of the template. Normally, you
would position its fold line edge to rest against the door surface but the blade stop is in the way.
Simply measure the distance from the door surface to the surface of the blade stop and
“subtract” that distance from the template half by either cutting the template or re-folding it.
The distance is usually around 3/8” (9.5MM) but it will vary from door to door depending on the
thickness of the blade stop and the spatial point at which the door is closed.
An alternate method for mounting the sub-plate dispenses with the template half and uses
the sub-plate as its own template. To employ this method, close the door and measure back
from the surface of the door past the blade stop 9/16” (14MM). The best way to do this is to
make two measurements and mark two points each of which is the correct distance away from
the surface of the door. Then a line can be drawn between the two points. The sub-plate may
be used as a straight edge for drawing this line.
Align the front edge of the sub-plate to this line and you have achieved the correct
backset. To set the lateral position of the sub-plate, move it away from the frame corner about
1/8” (3MM). This will allow the housing cover to fit over it and still produce an attractive mount
that appears to reach to the frame corner. Then mark and drill the mounting holes for the sub-
plate.
3.3 IF THE DOOR IS THINNER OR THICKER THAN STANDARD
The MXD sex bolt is dimensioned to precisely fit a 1 3/4” (44.5 MM) thick door which is a
common size. If the door is a different thickness, contact the factory. Securitron can supply
washers for a thinner door, which go under the head and key in to the anti-rotation pins while
including new anti-rotation pins. For a thicker door, the bolt may be partially unscrewed to
expand it for use with up to a 2” thick (51MM) door. If you do this, be sure to install Threadlock
on the threads (Threadlock is furnished in a capsule with the MXD). When the bolt is
“expanded” to suit a thicker door however, its ability to allow the door to move for delay
initiation is proportionately reduced. The factory, however, can supply spacers to adapt the bolt
to thicker doors while retaining full door movement distance.
3.4 MOUNTING THE PERMANENT MAGNET BRACKET, iMXD SEX BOLT AND STRIKE
Note the assembly drawing in Figure 2. The first step after all the holes are drilled from the
template is to install the permanent magnet bracket. Next, is to mount the special iMXD
sex bolt. Be sure you have checked the previous Section which covers a situation that deviates
from standard sex bolt installation. Then, note that the bolt includes two pins under the head
which will go in two separately drilled holes for anti-rotation. The pins act as their own
template. Unscrew the threaded base plate of the bolt and insert the bolt into the 1” hole which
you should have previously drilled. Tapping the bolt head will cause the pins to mark the door.
Remove the bolt and drill 3/16” (5MM) diameter holes for these anti-rotation pins. Then,
reinstall the sex bolt head, install some Threadlock from the capsule on the sex bolt base
plate threads and screw in the base plate.
Next, install the roll pin bushings into the holes previously prepared for them and install the long
(2”) roll pins into the strike plate. Then, place the flathead strike mounting screw through its
plastic bushing and through the strike plate. On the other side of the plate, push three rubber
washers and one steel washer onto the strike mounting screw as shown in Figure 2. To screw
this complete assembly into the iMXD sexbolt, you have to follow a special procedure to
prevent the female threaded shaft in the iMXD sexbolt from spinning. First, apply Threadlock
onto the strike mounting screw threads and then insert the screw into the iMXD sexbolt and turn
it a couple of times to catch a few threads. Then pull on the strike plate so that the spring
loaded female threaded shaft in the sexbolt comes out. Hold it out against its spring pressure by
rotating the strike a bit so that the roll pins no longer go into their bushings but hit the
permanent magnet bracket. This will allow you to get a vise grip onto the female threaded shaft
in the MXD sexbolt. Turn the strike mounting screw a couple of more turns and then re-rotate
the strike so that its roll pins again insert into their bushings. Then finish tightening the strike
mounting screw but don’t over-tighten so that the rubber washers become compressed.