
Installation Instructions for 45H & 47H Mortise Locks
BEST ACCESS SYSTEMS
a Division of Stanley Security Solutions, Inc.
Finishing the installation
12
18 Install cores
1 For a high-security cylinder, slide the armored face
down over the core.
2 Insert the control key into the core and rotate the key
15 degrees to the right.
3 With the control key in the core, insert the core and
armored face (high-security cylinder only) into the
cylinder.
4 Rotate the control key 15 degrees to the left and
withdraw the key.
Caution: The control key can be used to remove
cores and to access doors. Provide adequate
security for the control key.
19 Check operation
Check the operation of the lock. For example, check that:
■ door latches and opens properly
■ deadbolt operates properly
■ visual indicator operates properly
■ key access works
■ door gap is 1/8”
■ auxiliary bolt is held inside the case when the door
is closed.
For assistance, contact your local BEST representative.
Figure 18 Installing the core(s)
Control key
Core
Cylinder
Armored face
View of high-security cylinder
© 2005–2006 Stanley Security Solutions, Inc. and Stanley Logistics, Inc.
T81162/Rev C 1907197 ER-7991-12 Nov 2006
Using the latch holdback feature
The latch holdback feature lets you temporarily operate a
door with a CHB or RHB function mortise lock as a free-
swinging door. When latch holdback is engaged, the latch
stays retracted, and both the inside and outside levers
become fixed pull handles.
To engage latch holdback:
1 With the lock unlocked and the door open, turn the
inside lever to the up position.
2 While holding the inside lever in the up position, turn
the key as if to lock the door.
3 Release the inside lever and remove the key at the
12 o’clock position. The latch and inside lever become
fixed.
To disengage latch holdback:
1 Turn the key as if to unlock the door.
2 Remove the key at the 12 o’clock position. The latch
and inside lever release, and the lock operates
normally.
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