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For Entry Models With
Cylinder, Lever Handle & Electric Release:
Exterior unlocking
shall be either by a key and depression of the lever handle
or through an interface with the intercom or card access
system, which shall send an impulse to momentarily release
the lever handle, allowing it to be depressed and retract
the latch. The exterior shall always be in a "Fail
Secure" mode: key is always required for entry. Security
is maintained in the event of a power failure.
The exterior lever handle
shall be fabricated of cast stainless steel and contain
a slip-clutch apparatus which will lower or rise without
retracting the latch if depressed without insertion of the
key or electric release. The exterior lever handle unit
shall also contain the ability to replace the cylinder without
removing the interior or exterior trim plates. Access to
remove the cylinder shall be via allen screw though the
interior thru-bolt plate. The cylinder shall be protected
within a hardened steel cylinder protector.
Lockset trim shall be
thru-bolted with four bolts and one-way threaded caps. Power
required for the exterior trim is 24vAC, 30va (or 24vDC
if so specified). A Handle Stop is to be affixed to the
bottom of the exterior lever handle unit and shall protrude
outward so as to prevent handle rotation over 180 degrees.
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