NSi Industries LDS-A User Manual

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.

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-