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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
5/8” (16MM) for a model 32 Lock or 9/16” (14MM)
for a model 62
Lock. 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.
2.3 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 to 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.
2.4 MOUNTING THE PERMANENT MAGNET BRACKET, MXD SEX BOLT AND STRIKE
Note the assembly drawing in Figure 1. The first step after all the holes are drilled from the
template is to
install the permanent magnet bracket
. The model 62 version comes with four
self tapping screws to hold the bracket to the door and the model 32 version comes with two.
Note that this bracket is not handed. It
can be flipped
to place the permanent magnet
(concealed in an aluminum block) either to the right or the left to line up with the proximity switch
array on the sub-plate. The
proximity switch array can also be transferred to either side
of
the sub-plate (the holes are drilled for either position). The reason for this flexibility is to
maximize wiring options
. In the case of a concrete filled header, for example, the cable can
not usually be pulled up into the header. A flex conduit fitting can be attached to either end of
the cover and the proximity switch array and permanent magnet pack would then be positioned
on the opposite side of the fitting.
Your next task is to mount the special MXD 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
