INTERLOCK INSTRUCTION MANUAL
Kirk Key Interlock Company
211Wetmore Ave. S.E., Massillon, OH 44646
Phone: 330.833.8223 • Fax: 330.833.1528
Toll Free: 1.800.438.2442
www.kirkkey.com
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Type F, FN, B, NT, T, U, FR ................................. Page 2
Type D, DM,DY ................................................ Page 3-5
Transfer Panel.................................................... Page 6
nten
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Type S and Type K Auxiliar y Switches................. Page 7
Type TPS and Dust Covers................................. Page 8
of C
Key Control and Duplicate Keys....................... Page 9
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Service and Maintenance................................ Page10
Duplicate Key Release Form............................. Page
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11-12
Table of Contents:
Installation Instructions
Proper installation of key interlocks is a critical element of a key interlock system. It is essential that
each interlock be installed so that the lock bolt cannot be extended unless the equipment on which it
is installed is in the proper position/condition. After installation of the interlocks, the complete interlock
system should be tested sequentially by person(s) familiar with the entire system, the key routing,
and its intended purpose. Any problems or discrepancies must be corrected prior to energization.
Each interlock is supplied with a key in each cylinder. These keys are needed during installation of
the interlocks. Once the complete interlock system is installed, all extra keys must be removed from
the system and destroyed or retained by a responsible person. There should only be enough keys to
operate the interlock system sequentially. Kirk Key Interlock Company will not be responsible for
extra keys left in the interlock system.
Key interlocks with multiple cylinders require the insertion of all keys before the lock bolt can be
extended or withdrawn. Likewise, transfer blocks and transfer panels (which do not have exposed
lock bolts) require insertion of all keys before the operating bolt can be extended or withdrawn
allowing release of previously held keys. Do not try to force a multiple cylinder interlock that does not
have the correct keys fully inserted in every cylinder!
IB/B-T/06
PAG E 1
INTERLOCK INSTRUCTION MANUAL
Lock Body Lock Body
Lock Bolt Lock Bolt
Lock
Cylinder
Lock
Cylinder
Type F
Terminology
Type B
Terminology
Lock Bolt Extended
Key Released
Lock Bolt Withdrawn
Key Trapped
Single Cylinder Interlock
Key Removable Extended (E)
All KIRK Key Interlocks (Type F, FN, B, NT, T, U, FR)
The key interlock should be mounted so that the 5/8" lock bolt can be extended to lock the device
in the proper position. In the unlocked position, the lock bolt should be blocked from extending,
thereby trapping the key(s) in the interlock.
Multiple cylinder interlocks can be designed to retain one or more keys while the remaining keys
are withdrawn.
Two Cylinder Interlock
Keys Removable Extended (EE)
E
E
Lock Bolt Extended
Keys Released
E
Lock Bolt Withdrawn
Keys Trapped
E
Two Cylinder Interlock
Keys Removable (EW)
W
E
Lock Bolt Extended
E Key Released
W Key Trapped
Key interlocks with multiple cylinders require the insertion of all keys before the lock bolt can be
E
Lock Bolt Withdrawn
E Key Trapped
W Key Released
W
extended or withdrawn allowing release of the previously held keys. Do not try to force a
multiple cylinder interlock that does not have the correct keys fully inserted in every cylinder.
Three Cylinder Interlock
Keys Removable (EEW)
E
Lock Bolt Extended
E Keys Released
W Key Trapped
W
E
E
Lock Bolt Withdrawn
E Keys Trapped
W Key Released
Three Cylinder Interlock
Keys Removable (EWW)
W
E
Lock Bolt Extended
E Key Released
W Keys Trapped
W
E
Lock Bolt Withdrawn
E Key Trapped
W Keys Released
E
W W
W
IB/B-T/06
PAG E 2
INTERLOCK INSTRUCTION MANUAL
Lock Body
Latch Block
KIRK Door/Access Interlocks (Type D, Type DM, Type DY)
Type D Door Interlock
All Type D interlocks have two parts: a main body with one or more cylinders and a latch block. Proper alignment of both
parts is crucial to the operation of a Type D interlock. When the main body is separated from the latch block, the lock bolt
is retained in the withdrawn position by concealed latch pins. Thus the key(s) is always held in the lock whenever the two
parts are separated. When the door on which the interlock is mounted is properly closed, the key(s) can be turned to
extend the lock bolt into the latch block, securing the door. Only extending the lock bolt, after properly closing the door,
should allow release of the key(s). An exception to this rule is a multiple cylinder Type D interlock which allows release of
a "personnel" key when the door is opened. The personnel key can be put in the pocket of the maintenance person
ensuring that the door cannot be closed and locked as long as he holds the personnel key.
Type D Terminology
KIRK door interlocks should not be used to align the door, or be the latching means for holding the door in the closed
position. Type DM or DY interlocks should be utilized in situations where the door and door-frame are ill-fitting, and a
degree of latitude is required.
IB/B-T/06
The key is trapped in type D interlock when the door is open.
Mounting Options for Type D Locks and Latch Blocks
PAGE 3
INTERLOCK INSTRUCTION MANUAL
Insert Keys
Rotate keys 90 degrees
(clockwise). Grip eyebolt and
rotate latch bolt upward.
The latch bolt is now free
from the lock body
and the keys are trapped.
To Unlock
With eyebolt facing
outward, insert the latch
bolt into the lock body.
To Lock
Grip eyebolt and rotate
latch bolt downward.
Rotate keys 90 degrees
(counterclockwise) and
remove from lock.
Two Cylinder DM
(EE) Instructions
Insert "E" Key
Rotate "E" key 90 degrees
(clockwise). Grip eyebolt and
rotate latch bolt upward.
The latch bolt is now free
from the lock body
and the "E" key is trapped.
To Unlock
Insert the "W" key.
To Lock
Rotate "W" key 90
degrees (clockwise).
Insert latch bolt and rotate
downward to capture
latch bolt in lock body.
The "W" key is trapped.
Rotate the "W" key 90
degrees (counterclockwise)
and remove from the lock.
Rotate "E" key 90 degrees
(counterclockwise) and
remove from the lock.
Two Cylinder DM
(with Personnel Key)
(EW) Instructions
E
W
E
E
W
E
W
W
E
E
W
W
E
W
E
W
Lock Body
Lock Cylinder
Latch Bolt
Access Door
Weld or Bolt
Chain to Door
DM Terminology
Rotate key 90 degrees
(clockwise). Grip eyebolt and
rotate latch bolt upward.
Insert Key
The latch bolt is now free
from the lock body and
the key is now trapped.
To Unlock
With eyebolt facing
outward, insert the latch
bolt into the lock body.
To Lock
Grip eyebolt and rotate
latch bolt downward.
Rotate key 90 degrees
(counterclockwise) and
remove from lock.
Single Cylinder
DM Instructions
Type DM Access Door Interlock
All Type DM interlocks have two parts: a main body with one or two cylinders and a latch bolt with chain. When the
latch bolt is separated from the main body, the key(s) is trapped in the lock. When the door on which the interlock is
mounted is properly closed, the latch bolt can be inserted into the main body and the key can be turned and released.
Weld or bolt the chain to the door or door-frame allowing enough slack to insert and turn the latch bolt in the Type DM
lock body when the door is properly closed.
DM Terminology and Operating Instructions
The "E" keys can be turned and released when the latch bolt is latched and the "W" keys can be turned and released
when the latch bolt is unlatched.
IB/B-T/06
PAGE 4
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