✆
Call (800) 879-8585 For Technical Support
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✆
Call (800) 879-8585 For Technical Support
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S
UNIT DESCRIPTION
The LightSaver
®
Controller (LS-100X version A & B) automatically switches
artificial lighting systems off when enough natural light is available to illuminate
an area. The Controller will also automatically turn lighting systems back on
again when needed. The LS-100XA operates within a range of 10 to 200
footcandles and is generally used in office areas with vertical panes of glass. The
LS-100XB operates within a range of 50 to 1000 footcandles and is often used
in skylights and solar/atrium areas.
The LS-100X remotely controls lighting systems through low-voltage wiring
which is connected to Watt Stopper power packs. These power packs are
capable of switching a wide range of different lighting configurations and loads
on the command of the LS-100X.
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DEADBAND/LEVEL SETTING ILLUSTRATION
If lighting levels drop below the ON level (here set to 50 Footcandles), the LED
will turn red and the lights will go on after the user-adjustable time delay has
expired. Light levels may increase after the lights are turned on, but the lights
will remain ON until the OFF level is reached. Should light levels climb above
the OFF level, the signal LED will turn green, and the lights will turn off when
the time delay has expired. This deadband feature prevents lighting system from
cycling on cloudy days.
75 FC
50%
"ON" Level (Red LED)
"OFF" Level (Green LED)
Deadband
55 FC
FootCandles
Deadband Level (in percent)
50 FC
10% (minimum)
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UNIT CONTROLS
Time Delay Control-
The time delay control is found
on the back of the unit. It is
necessary to set the time delay
prior to final mounting of the
unit. The time delay controls
the amount of time that the
sensor waits before it changes
the condition of the lights. That
way, the sensor will not rapidly
cycle lighting systems when the
sun is alternately shining and
hiding behind cloud cover. The
time-delay adjustment is at its
minimum (three seconds)
when fully clockwise, and at its maximum (five minutes) when fully counter-
clockwise. The time delay is preset at three minutes.
LED Indicator-
The LED indicator is a dual-color LED which will be green
when ambient light levels are above the setpoint, and red when ambient light
levels are below the setpoint.
Sensitivity Control-
Under the front cover, the trimpot (flathead
screwdriver fitting) marked “S” determines at what light level the LS-100X will
turn lights on. Decreasing (turning counter-clockwise) the setting decreases the
amount of light required before the sensor will turn lights on.
Deadband Control-
The trimpot marked “D” determines at what point
the lights will turn off. This adds to the sensitivity setpoint a deadband of non-
activity from 10% to 100% above the ON level. Light levels that fall within the
deadband will have no effect on the condition of electrical lighting. This feature
also prevents rapid lighting system cycling on partly-cloudy or marginal days.
See the section
Setting Levels
for more information.
ON/Bypass-
The ON/Bypass pin is the rectangular cutout located next to
the sensitivity adjustment. When the bypass pin is inserted in this slot, lighting
systems are overridden into the ON position. They remain on as long as the
ON/Bypass pin remains inserted.
The unit should be mounted so that the
center of the LS-100X’s window rests at a
45° angle to the natural light source.
±
WARNING
±
Do not place sensor in or point sensor
at direct sunlight.
1. Wire the sensor to the power pack as
described in the section
WIRING
DIRECTIONS.
2. Since the time delay trimpot is located on
the back of the sensor, the sensor must
be adjusted before it has been
permanently mounted to the ceiling.
Adjust the sensor as described in the
section
SETTING LEVELS.
3. After the sensor has been adjusted, attach the sensor to the mounting
surface with the two screws provided.
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D
S
INSTALLATION
≠
CAUTION
≠
TURN THE POWER OFF AT THE CIRCUIT BREAKER BEFORE
INSTALLING POWER PACK AND SENSOR!
S
D
LED Indicator
Mounting
Holes
Sensitivity
Adjustment
Deadband
Adjustment
Sensor
Window
Bypass Pin
Socket
Time Adjustment
(on back)
S
WIRING DIRECTIONS
For normal Installation, connect:
Red wire from light sensor to Red wire from power pack.
Black wire from light sensor to Black wire from power pack.
Blue wire from light sensor to Blue wire from power pack.
Control Output 24VDC
Common
+24VDC
Lighting
Load
WHT (Neutral)
RED (Load)
RED (Line)
WHT
BLK
Hot
Neutral
Power Pack
RED
BLK
BLU
Switch
BLU
RED
BLK
LightSaver Sensor
