Wattstopper
®
Passive Infrared Wall Switch Occupancy Sensor
Installation Instructions • Instructions d’Installation • Instrucciones de Instalación
No: 23995 – 06/16 rev. 1
Catalog Numbers • Les Numéros de Catalogue • Los Números de Catálogo: WS-250
Country of Origin: Made in China • Pays d’origine: Fabriqué en Chine • País de origen: Hecho en China
SPECIFICATIONS
Voltages .............................................................................................120 or 277VAC, 60Hz
Load Requirements
@ 120VAC, 60Hz ..............0‑1000VA Tungsten, Ballast, E‑Ballast and LED Driver, 1/4 hp
@ 277VAC, 60Hz ..............................................0‑1800VA Ballast, E‑Ballast and LD Driver
Time Delay Adjustment .................................................................30 seconds ‑ 30 minutes
Sensitivity Adjustment .......................................................................... Minimum‑Maximum
Light Level Adjustment ...................................................................................10 ‑ 200 + FC
UNIT DESCRIPTION AND OPERATION
The WS‑250 PIR Wall Switch Occupancy Sensor turns lighting or fan
loads ON and OFF based on occupancy and ambient light level. They
are designed to replace a standard light switch. The WS‑250 operates
with 120 or 277VAC line voltage. All other features are the same in
both models. (Throughout this manual, “WS” is used to indicate either
sensor.)
The sensor uses passive infrared technology to sense human motion
and defines it as occupancy. A green LED on the sensor blinks upon
occupancy and then resets. It will blink again when it detects motion
after the 2‑second reset.
The sensor turns ON the load automatically when it detects occupancy.
Once the space is vacant and the time delay elapses, it turns OFF the
load automatically.
If adequate ambient light is already present in the area, the sensor
will hold OFF the load it controls. When the light drops below a field
selectable level and the sensor detects occupancy, the sensor turns
ON the load. Once turned ON, the load remains ON until the space
is vacant or the light level rises above the setpoint and the time delay
expires.
Manual Operation:
The occupant can press the ON/OFF button to turn the load ON and
OFF. When the load is turned OFF or ON manually, it stays OFF or
ON as long as the sensor detects motion. After no motion is detected
for the length of the time delay, the sensor goes back to automatic
operation. If the load was ON, it turns OFF. The next time the sensor detects occupancy
and the ambient light is lower than the set level, the sensor automatically turns ON the
load.
Walk‑test feature:
When the Time Delay trimpot is fully in the counterclockwise position, the sensor has a 30‑second time delay. This allows you to quickly
check the sensor coverage area.
Service function:
In the event of unit failure or if it is necessary to leave the load ON, remove the Service Jumper plug. This disables all automatic ON and
OFF functions and the load can only be operated using the ON/OFF button.
Maximum = clockwise
Minimum = counterclockwise
ON/OFF
Switch
Service
Jumper
Light Level
Time Delay
Sensitivity
LED
Fresnel Lens
(Switch Cover)
on tab and
pry off Cover
(L)
(T)
(S)
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