Kirk SKPM User manual

Installation Instructions
Proper installation of key interlocks is a critical element of a key interlock system. It is essential that
each SKPM, SKRU, or TDKRU be installed so that the key(s) cannot be released unless the
equipment to 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 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.
Instruction Manual for:
Solenoid Key Release Unit and Time Delay Key Release Unit
PAGE 1
TypeSKPM.........................................................Page2
Type SKRU ........................................................ Page 3
Type SKRU Wiring Diagram................................. Page 4
Type TDKRU........................................................ Page 5
Type TDKRU Wiring Diagram............................... Page 6
Key Control and Duplicate Keys....................... Page 7
Service and Maintenance................................ Page 8
Tabl of C entse ont :
Kirk Key Interlock Company
9048 Meridian Circle NW, North Canton, OH 44720
Phone: [phone] • Fax: [phone]
Toll Free: 1.800.438.2442
www.kirkkey.com
Table of Contents:
IB/KRU/06
Duplicate Key Release Form.............................
Page 9 -10

®
KIRK Solenoid Panel Mounted (
The SKPM consists of a keyed interlock, a solenoid, and a pair of auxiliary switches (2 N.O. and 2
N.C. contacts). The SKPM is designed to permit removal of the interlock key in response to an
electric signal. Upon energizing the solenoid, the key can be turned and released. Turning the key
operates the auxiliary switch.
Type SKPM)
PAGE 2
NOTE :T hek eyisheldint heS KPMuntilthesolenoidisenergized.T hedr awings howst hepos itionofthecontactswhenthekeyisheld.Oncethe
solenoid is energized and the key is rotated and released, the contacts will change state.
FRONT VIEW SIDE VIEW
N.C. N.O.
Instruction Manual for:
Solenoid Key Release Unit and Time Delay Key Release Unit
SKPM Wiring Instructions
1) Mount SKPM in the panel or enclosure.
2) Connect solenoid leads to the appropriate circuit.
3) Wire the auxiliary contacts (if required).
4) Test the wiring to verify that the circuitry corresponds to the proper key position (trapped vs.
free).
IB/KRU/06

The SKRU consists of a keyed interlock, a solenoid, and a DPDT (quick-make, quick-break) auxiliary
switch. The SKRU is designed to permit removal of a key (or keys) in response to an electric signal.
A pushbutton and/or an indicating light are available options. All electrical components are wired out
to a terminal block.
A single key SKRU is designed to have a key “trapped” in its lock until a signal is sent to the solenoid.
When the solenoid is energized the key can be rotated and released. Turning the key operates the
auxiliary switch. The released key can then be utilized in an interlock sequence. By returning and
rotating the key, it once again becomes “trapped” and the auxiliary switch goes back to its original
state.
The SKRU is available 1) unhoused, 2) unhoused with front cover only, or 3) housed in an aluminum
box with two conduit openings. See the examples above. Two key SKRUs are available two ways;
1) with both keys released upon energization of the solenoid or, 2) requiring an initiating key and a
signal to the solenoid to enable release of a previously held key. It is important that the installer
understand the entire interlock system and its intended purpose.
®
KIRK Solenoid Key Release Unit (Type SKRU)
PAGE 3
SKRU - Housed
SKRU - Unhoused
SKRU - Unhoused
with front cover only
(Front and Top view)
Instruction Manual for:
Solenoid Key Release Unit and Time Delay Key Release Unit
Housed
Housed
(Front Panel Mounted)
(Back Panel Mounted)
Cover
Cover
IB/KRU/06

Note: the above wiring diagram includes the pushbutton and indicating light. Call the factory or visit
our website ( ) for the wiring diagram that applies to your specific application.
1) Mount the SKRU in the panel or enclosure.
2) Wire all circuits according to the appropriate wiring diagram.
3) Test the wiring to verify that the circuitry corresponds to the proper key position (trapped vs.
free).
SKRU Wiring Instructions
www.kirkkey.com
PAGE 4
KIRK INTERLOCK
KEY NORMALLY
RETAINED IN LOCK.
KEY REMOVABLE WHEN
SOLENOID IS ENERGIZED.
D.P., D.T. AUX. SWITCH.
CIRCUITSB&D
NORMALLY CLOSED.
CIRCUITSC&E
NORMALLY OPEN.
CIR. ACIR.CIR. A
CIR. BCIR.CIR. B
CIR. CCIR.CIR. C
CIR. DCIR.CIR. D
CIR. ECIR.CIR. E
SOLENOID
PUSH BUTTON
(Close to Energize Solenoid)
NORMALLY
DEENERGIZED
SIGNAL LAMP INDICATES
WHEN SOLENOID IS
ENERGIZED.
156-617
CUSTOMER TO WIRE THIS SIDE ONLY
88
77
66
55
22
44
33
®
KIRK Solenoid Key Release Unit (Type SKRU) Wiring Diagram
1
Instruction Manual for:
Solenoid Key Release Unit and Time Delay Key Release Unit
1
IB/KRU/06

PAGE 5
®
KIRK Time Delay Key Release Unit (Type TDKRU)
The TDKRU is comprised of two key interlocks, a timing device, a solenoid, and an indicating light.
The unit is available housed in an aluminum enclosure or unhoused with front cover only. All
electrical components are wired out to a terminal block. See the wiring diagram on page 6.
The TDKRU is a two key device. The secondary key is held in the unit until the initiating key is
inserted and turned starting the time delay sequence. The initiating key will come from an interlock
on the equipment being de-energized (such as a capacitor bank or rotating equipment). Inserting and
rotating the initiating key begins the time delay sequence. After the predetermined delay, the
indicating light illuminates permitting the secondary key to be turned and released thereby trapping
the initiating key in the TDKRU. The secondary key can now be safely utilized on related key
interlocked equipment (such as a ground switch or access door).
Instruction Manual for:
Solenoid Key Release Unit and Time Delay Key Release Unit
HELD
KEY
INITIATING
KEY
IB/KRU/06

PAGE 6
TDKRU Wiring Instructions
1) Mount the TDKRU in the panel or enclosure.
2) Wire all circuits according to the wiring diagram.
3) Test the wiring to verify that the circuitry corresponds to the proper key position (trapped vs.
free).
4) Set the timing to the proper delay setting.
5) Test to verify the proper time delay.
SOLENOID
SIGNAL LIGHT
TIMING RELAY
INTERLOCKS
FXK FK
A-3 A-2
8
7
6
5
2
4
3
1-
1
3
7
8
TERMINAL
BLOCK
+
-
+
+
-
POWER SOURCE
1
53 46
2
L1 L2
AUX. SW.
Key Release Unit (Type TDKRU) Wiring DiagramKIRK Time Delay
®
Instruction Manual for:
Solenoid Key Release Unit and Time Delay Key Release Unit
IB/KRU/06

PAGE 7
Key Control
IMPORTANT - To ensure correct operation of the KIRK interlock system it is necessary to remove all
loosely or removable held keys before operating the equipment on which the interlocks are mounted.
There should only be enough keys to operate the interlock system sequentially.
The keys removed from the KIRK interlocks should be returned to Kirk Key Interlock Company,
North Canton, Ohio, or retained by authorized personnel for use as spare keys.
The spare keys must not be normally available to operating personnel, since the use of these keys, where
not specifically required, will result in incorrect operation of the equipment on which the interlocks are
mounted. Any spare keys should be given to operating personnel only, if and when the
corresponding operating key has been destroyed.
ADDITIONAL KEYS will be provided ONLY with proper authorization from the ultimate user to which the
®
specific key combination has been assigned.
®
Duplicate Keys
Each interlock is supplied with a key in its lock. These keys are needed during installation of the
interlocks on equipment. This then provides more keys than are actually necessary for operation of
the interlock system.
When the interlocks have been installed, all extra keys should be removed from the system and
destroyed or retained by authorized personnel. If additional keys are required because of loss or
damage, they can be supplied only on the purchaser’s authorized order. To order additional or
replacement keys, please:
1) Copy the duplicate key release form on pages 9 and 10 of this manual, or print from http://www.kirkkey.com.
2) Complete the form and sign your name.
3) Fax the form to Kirk Key Interlock Company for immediate delivery, at 330-833-1528.
KIRK
A1
KIRK
A1
Instruction Manual for:
Solenoid Key Release Unit and Time Delay Key Release Unit
IB/KRU/06

PAGE 8
Instruction Manual for:
Solenoid Key Release Unit and Time Delay Key Release Unit
Service and Maintenance
Lubrication
Do not use oil of any type
Kirk Key Interlock Company cannot warranty interlocks that have been oiled.
- Interlocks should be periodically lubricated with a small amount of dry powdered
graphite. as the oil will collect dirt and "foul" the lock cylinder so that it will
not operate. Apply a small amount of graphite to the key and insert the key into the lock cylinder.
Work the key in and out and turn the key several times in order to distribute the graphite inside the
lock cylinder.
Kirk Key Interlock Company offers a Graphite Lubrication Kit (part number GL-1) complete with
instructions for use. The powdered graphite is supplied in a plastic tube that can be "squeezed" to
force a small amount of graphite into the lock cylinder. As described above, work the key in and out
and turn the key a few times in order to distribute the graphite inside the lock cylinder.
NOTE: Stainless steel dust covers should be utilized to protect the lock cylinders when located
outdoors or in a demanding environment. Dust covers are available separately and can be easily
added to any interlock.
Factory Service - Under normal operating conditions, KIRK® interlocks should not require any
maintenance service, other than graphite lubrication. However, if refurbishment or replacement
should be required, contact Kirk Key Interlock Company, North Canton, Ohio. All factory service
will be performed as quickly as possible to minimize your down time.
Any damaged or malfunctioning interlock should be returned
to Kirk Key Interlock Company, North Canton, Ohio. If this is
not possible and replacement locks are required, the
following information must be forwarded to Kirk Key Interlock
Company:
KIRK Key Interlock
S.O.
ITEM
ITEM NUMBER
ORDER NUMBER
NORTH CANTON OHIO, USA
1-800-438-2442
KIRKKIRK
1) Lock Number - obtain from the face of lock cylinder.
2) S.O. Number - obtain from nameplate on interlock
3) Item Number - obtain from nameplate on interlock
4) Key Interchange Number (if applicable) - obtain from
LOCK NUMBER
the face of lock cylinder.
KEY
NINTERCHA GE
KEY
INTERCHANGE
IB/KRU/06