LEGRAND WattStopper WP-605 User manual

Model#s:

WP-605, WP-1105,

WP-2205 &WP-2255

Ultrasonic Occupancy Sensors

32kHz

UNIT DESCRIPTION

The Watt Stopper ultrasonic occupancy sensor opera tes on 24VDC, or half wave re c t i ﬁed 24VAC, and

automatically turns lighting syste m s on and off based on occ u p a n c y. The sensors use Dopple r

tec h n o l ogy to sense occu p a n cy. They bro a d ca st high frequency sound waves into the co n t rolled

area. Movement in the area will cause the sound waves to return to the sensor at a faster or

slower rate resulting in a doppler shift and occupancy detection. When the ultrasonic sensor

detects occupancy, it switches lighting on through a Watt Stopper relay-based lighting co n t rol panel.

COVERAGE PATTERNS

UNIT PLACEMENT

P l a cement of ultrasonic sensors is critical for proper operation. It is best to place the sensor

so that it has a clear view of all desktops and work surfaces within the coverage area. Orientation

of the sensor is also important. The WP-605 offers 360° one-sided coverage while the WP-1105,

WP-2205 and WP-2255 provide 360° two-sided coverage.

Transducers (the two or four small round openings on the cover of the sensor) operate in pairs

(see the Coverage Patterns graphic, previous page), and the centerline of the pair must be

oriented correctly for proper coverage.

Note:

•The transducer pairs orientation determines the coverage pattern.

•Do not mountsensor so that transducers point toward a wall that is within 4 feet of the sensor.

•Sensors should be installed at least 4 feet from supply ducts and a minimum of 6 feet from

horizontal discharge ducts.

•Do not mount sensors within 6 inches of a power pack.

•Always mount the sensor on a rigid vibration free surface.

•When mounting multiple sensors in a large room, do

not mount the sensors within 10 feet of each other.

Open Ofﬁce Sensor Placement

A typical layout for an open ofﬁce space is to place

the ultrasonic sensors so they control the ofﬁce

area in zones that overlap. A 20% cove ra g e

overlap is recommended.

Enclosed Ofﬁce Sensor Placement

For smaller enclosed spaces, a WP-605 is

re com m ende d . Sensors should be placed so that

they will not detect motion through an open door.

Trans d u ce rs must face into the room and not be

dire c te d toward the closest walls or doors.

Coverage

Overlap

(WT-2205

shown)

INSTALLATION Note: Always try to attach the sensor to a vibration free surface.

Acoustic Tile Mounting

Install the Threaded Insert, ﬂange side, into the hole

on the back of the sensor. Turn clockwise until it locks.

Keyhole Mounting

Position keyhole mounting screws so that the transducer

pairs point in the desired direction.

1. Use the template below to mark the location of

mounting screws.

2. Install the provided screws—leaving approximately

3mm (1/8") space from the bottom of the screw head to

the ceiling (see diagram).

3. Place the sensor’s mounting keyholes over screw

heads and rotate sensor clockwise until secured.

Nut

Washer

Threaded

Insert

7/8" (22mm)

hole

Ceiling Tile

Rotate

clockwise

Ceiling

Screws: 103mm

(4.1") apart

Space:

3mm/(1/8")

WIRING DIRECTIONS

A sensor can be used to directly control up to two(2) RR7 relays in a WattStopper lighting

control panel. Wiring to the relay is the same color convention as the panel wiring diagram.

•Blue from panel to Blue from sensor

•White from panel to White from sensor

•Black from panel to Black from sensor

•Red from panel to Red from sensor

• Green from Primary WP sensor to secondary WP sensor

CAUTION

TURN POWER OFF AT CIRCUIT BREAKER BEFORE WORKING WITH OR NEAR HIGH VOLTAGE.

SENSOR ADJUSTMENT

THE SENSORS ARE FACTORY PRESET* TO ALLOW FOR QUICK INSTALLATION IN MOST

APPLICATIONS. However, veriﬁcation of proper wiring, coverage, sensitivity, and time delay

adjustments can be made through the following steps.

Sensitivity and Time Delay adjustments are both made under the sensor’s front cover. Insert a

small ﬂat-blade screwdriver in the slot of the front cover to open it.

Adjustment:

• Furnishings, carpeting or ofﬁce structures can affect ultrasonic sensitivity and should be

installed before adjustment, if possible.

•Ultrasonic sensors should have their sensitivity adjusted when interference from air

movement is at its maximum. Override the HVAC and VAV systems to the maximum “ON”

position when making a sensor sensitivity adjustment.

1. Set the Sensitivity adjustment trimpot to about mid-range.

2. Set the Time Delay to 15 seconds for this testing procedure.

3. Move out of the controlled area – the lights will turn off in about 15 seconds from the last ﬂash

of the red LED. If the LED continues to ﬂash, the sensor is detecting some kind of movement.

Turn the Sensitivity adjustment trimpot down slightly (counterclockwise) and repeat this step

until the LED does not ﬂash and the lights turn off.

4. Now walk into the controlled area. If the lights don’t turn on, increase the Sensitivity slightly

(clockwise) and try again. Repeat this procedure until the lights come on when entering the

controlled area.

5. Also, if the lights turn off while the room is occupied, it may be necessary to increase the

Sensitivity slightly.

6. Set the desired Time Delay – 16 minutes works well for normal applications.

* Factory preset = sensitivity – 50% / Time Delay – 16 minutes.

DIP Switch Settings Table

Sensitivity Adjustment

Trimpot

(factory preset to 50%)

DIP Switch

LED Indicator

*factory preset

The Sensitivity Adjustment Trimpot (labeled “S”)

increases or decreases occupancy detection sensitivity.

The Time Delay is the length of time the lights stay on

after no motion has been detected. It is set with DIP

Switches #1 – 5.

The red LED ﬂashes each time the unit senses motion.

It remains on when the sensor is in Override mode.

Override – setting DIP switch #6 to “ON” will bypass

(override) all the sensor’s occupancy control functions.

Lights can still be manually on/off controlled with a

light switch.

Output Disable– setting all DIP switches to “OFF” will

disable the Control Output (see Wiring Directions). This

can be used for troubleshooting sensor and lighting

control panel problems.

TROUBLESHOOTING

•Check that wiring connections are correct and secure.

•Make sure that the line voltage is +/- 10% of rating.

•Setting the DIP switch to Output Disable sends a Single OFF pulse to the panel.

•Setting the DIP switch to Override sends a Single ON pulse to the panel.

Lights do not turn off after the time delay elapses,

and

•The red LED does not ﬂash (does not sense motion)—possible sensor or panel problem:

– Set DIP switches to Output Disable.

•If lights go out, possible sensor problem (Call Tech Support).

•If lights do not go out, check wiring. If OK, possible lighting control panel problem

(Call Tech Support).

•The red LED ﬂashes (senses motion):

– Set DIP switches to Output Disable, and check black wire connection at panel.

•If the lights do not go out, check wiring. If OK, possible lighting control panel problem

(Call Tech Support).

•If the lights go out, reset the DIP switch to previous settings. Note the sensitivity and time

delay settings, then lower the sensitivity and time delay adjustment to minimum.

a) If the lights go out after the set time delay period, the sensor may have been adjusted too

high, so that vibration, air movement or other minor motion was activating it. Adjust the

sensitivity down from its previous setting to a level needed for normal operation, and

reset the time delay.

b) If the lights still do not go out, possible sensor problem (Call Tech Support).

CAUTION

TURN POWER OFF AT CIRCUIT BREAKER BEFORE WORKING WITH OR NEAR HIGH VOLTAGE.

Lights do not turn on, even with motion in the room, and:

•The red LED does not ﬂash (does not sense motion):

–Make sure the circuit breaker has been turned back on.

–Check the sensitivity setting and increase as needed.

–Check that 24V rectiﬁed. is at the blue wire.

•If 24V rectiﬁed is present, possible sensor problem (Call Tech Support).

•If 24V rectiﬁed is not present at the sensor, possible panel problem.

•The red LED ﬂashes (senses motion):

–Check the connection on the RED wire at the panel.

–Check for 24V rectiﬁed at sensor blue wire.

• If present, check wiring connections. If OK, poss i b lepanel problem (Call Tech Support).

Override:

Setting DIP switch #6 to on will bypass (override) all the sensor’s occupancy control functions.

Lights can still be manually on/off controlled at the panel.

•Set DIP switch to override:

–If lights go on, possible sensor problem (Call Tech Support).

–If lights do not go on, check wiring. If OK, possible panel problem (Call Tech Support).

ORDERING INFORMATION

• All sensors available in white.

Catalog # Description

WP-605 360° one-sided, 32kHz Ultrasonic Occupancy

Sensor, up to 600 sq ft coverage

WP-1105 360° two-sided, 32kHz Ultrasonic Occupancy

Sensor, up to 1100 sq ft coverage

WP-2205 360° two-sided, 32kHz Ultrasonic Occupancy

Sensor, up to 2200 sq ft coverage

WP-2255 360° two-sided, 32kHz Ultrasonic Occupancy

Sensor, up to 90 linear ft coverage

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