P:\INST INSTRUCTIONS\BOLT LOCKS\INST-2490A REV C 10-21 Page 1
2490A
EXTRA NARROW CONCEALED MORTISE BOLT LOCK
FAIL-SECURE
Any suggestions or comments to this instruction or
product are welcome. Please contact us through
our website or email [email protected]
Easy installation or servicing
All Space Saver locks
are easily installed in
any existing entrance
merely by mortising out
a cut-out, attaching the
wiring, inserting the
lock, and bolting it into
position with two
attaching tabs. Cutting
studs is no longer a
problem or expense.
OVERHEAD INSTALLATION HORIZONTAL
1. Examine the top rail of the door for the most suitable location for the strike plate. Mark the door for the end of the strike closest to
the lock stile, and make a corresponding mark on the header to line up with the first mark.
2. Locate center line of door thickness on the header and attach adhesive cut out template to header. Lining it up with marks, center
punch the tab-mounting screw locations and counter-sink for #10 screw. Saw or rout out the cutout area. Continue to step 5.
SIDEJAMB INSTALLATION VERTICAL
3. Examine the lock stile jamb for the point nearest the center of the door height, with space available for the lock and strike. Mark
the door stile horizontal for the top end of the strike plate and make a corresponding mark on the jamb.
4. Locate center line of door thickness on the jamb and attach adhesive cutout template to jamb, lining up the the top of the cutout
with the horizontal mark on the jamb. Center punch the tab mounting screw locations and counter sink for #10 screw. Saw or rout
the frame cutout.
5. Attach the mounting tabs inside.
6. Attach power supply and access control leads to lock leads as shown on page 2. Handle the lock carefully; do not hang it by the
wire leads. Insert wiring into the header cavity carefully so they do not interfere with proper locating of the lock in the cutout.
7. Insert lock. When installed overhead horizontally, the bolt end is nearest the lock stile. When installed vertically on the sidejamb,
the bolt must be at the top end of the cutout. Secure with #10-32 machine screw.
8. Using strike plate as a template, mark screw hole location and drill holes for screws supplied. Mortise as required. Attach strike.
9. The Automatic Relock Switch (ARS) is set for 1/8” clearance between the top of the door and transom bar or head jamb. Any
additional gap may be compensated for by loosening the lock nut and turning the switch assembly clockwise until proper
adjustment is reached. Be sure to tighten lock nut when adjustment is satisfactory.
Fig. 2
Auto Relock Switch (ARS)
Adjustable for Wide Door Gap
Loosen nut.
Turn assembly
clockwise for wide
door gap.
Tighten nut.
Fig. 1
SECURITY DOOR CONTROLS ■ WWW.SDCSECURITY.COM
[t] 800.413.8783 ■ 805.494.0622 ■ E-mail: [email protected] ■ 801 Avenida Acaso, Camarillo, CA 93012 ■ PO Box 3670, Camarillo, CA 93011
INSTALLATION INSTRUCTIONS
2. Position screws
for attaching tabs,
drill holes, attach tabs.
1. Mortise cut-out in
tube for face plate
(fits flush with
surface of tube).
3. Connect wiring
to lock.
4. Slide lock into
position, attach
to tabs.
