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TORK
Lighting Delay Switch
Model: LDS, LDS-A
INSTALLATION AND USER’S GUIDE
FUNCTION & DESCRIPTION
The Lighting Delay Switch is an accessory to any
TORK maintained contact time switch and is used
to extend the lighting time after the main time
switch turns OFF a lighting circuit. An approximate
1/2 second blink will occur as a warning that the
lighting will go OFF in (user selectable) 1 or 5
minute warning period.
Remote momentary ON/OFF push button switches can be connected to the designated terminal of
the Lighting Delay Switch using low voltage # 18 22 AWG twisted pair wires. Pressing the remote
ON button momentarily during the 1 or 5 minute
warning period (before the lights go out) will
extend the time ON for a user selectable 1/2 hour,
1 hour, 1-1/2 hour, 2 hours, 6 hours, 9 hours, or
12 hours. At the end of the extended time a warning blink will again occur, allowing personnel to
repeat another 1/2 - 12 hour extension if necessary.
Pressing the remote OFF button for 3 to 4 seconds
will terminate the extension of time, and initiate the
warning blink. The lights will turn OFF after the 1 or
5 minute warning period.
When starting up after a power failure (if time
switch is not ON), lighting will be turned ON for 10
minutes. At the end of the 10 minute period a
warning blink will occur. The lights will remain ON
for the 1 or 5 minute warning period. If an extension of time is required, press the remote ON button momentarily.
This unit is ideally suited to meet Energy
Conservation construction codes relative to controlled lighting after hours and assures lighting will
go OFF after personnel (i.e. cleaning-staff working
after hours) leave the building.
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NOTE:
1. Multiple remote momentary push buttons may
be wired to the same terminals for access from different locations.
2. The Lighting Delay Switch can be operated as
a stand alone control using remote ON/OFF
momentary push-buttons.
3. If time of day control is also required, see
wiring diagram for time switch interface.
A. Pressing the remote ON momentary push-but-
ton while the time switch is ON will start the
internal timer of the Lighting Delay Switch, but
will have no immediate impact on the load output (lights). When the time switch turns OFF,
the load will remain on for the duration left on
the LDS.
B. Pressing the remote OFF push button for 3 to 4
seconds while the time switch is ON will terminate the internal timer of the Lighting Delay
Switch, but will have no impact on the load output (lights remain on). When the time switch
turns OFF, the load will turn OFF after the
warning period.
SETTING & WIRING DIAGRAM
Step 1:
Model LDS only.
Remove the unit from the plastic
track. Mount the plastic track with provided hardware only. Do not use other hardware. Snap the
unit back into the track.
Step 2:
Before wiring, power to this unit, the time
switch, and the equipment it controls must be
turned off at the main panel. Wire the unit
according to the appropriate wiring diagrams
provided. Be sure to follow local and all other
codes.
Step 3:
Set all switches #1, 2, 3, and 4 to the ON position
for test. This will accelerate the complete opera-
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tion of the unit to under 1 minute, allowing a check
of the wiring and the functions.
Step 4:
Set the extended time delay for the main load to
the appropriate time by adjusting switch #1, 2, and
3. See table for desired timing.
Step 5:
Set the warning period for 1 or 5 minutes using
switch # 4. See table for desired timing.
Step 6:
Remote ON/OFF momentary push buttons can be
connected at the remote input terminal between C
& ON to activate extended time, and C & OFF to
disable extended time.
SWITCH CONFIGURATION
TIME
SET
1/2 HR
1 HR
1-1/2 HR
2 HR
6 HR
9 HR
12 HR
TEST
1
OFF
OFF
OFF
OFF
ON
ON
ON
ON
2
OFF
OFF
ON
ON
OFF
OFF
ON
ON
3
OFF
ON
OFF
ON
OFF
ON
OFF
ON
4
*
*
*
*
*
*
*
ON
*Switch 4 (ON) – 5 Minute Warning Period
*Switch 4 (OFF) – 1 Minute Warning Period
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TORK
®
MLI-137(A) 1 GROVE STREET, MT. VERNON, NY 10550 TEL: 914-664-3542
FAX: 914-664-5052
WIRING DIAGRAMS
Important Note:
When the Lighting Delay Switch is first activated –
A. If the time switch is set to ON, the lighting will
remain ON.
B. If the time switch is set to OFF, the lighting will
turn ON for 10 minutes. At the end of the 10
minute period, the warning blink will occur. The
lighting will remain ON for the 1 or 5 minute
warning period. If an extension of time is
required, press the remote ON button momentarily, the lighting will remain on for an additional
1/2 - 12 hour extension of time.
TORK TIME SWITCH
CAUTION: Turn power off at main circuit prior
to installation or when servicing this unit.
OFF
MOMENTARY
PUSH-BUTTON SWITCH
ON
REMOTE
INPUT
C ON OFF
DO NOT APPLY
VOLTAGE
OUTPUT TERMINALS
NO C NC
H N N 120
TIME SWITCH
INPUT
208
240
INPUT POWER
MAIN LOAD OUTPUT
TERMINALS
NC NO C
VAC
277
LOAD
H
N
H
N
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