C.P. Electronics MWS3 Instruction manual

PRODUCT DATA AND INSTALLATION SHEET
MWS3 M ULTI -S ENSE
M ICROWAVE P RESENCE D ETECTOR
The MWS3 microwave presence detectors are designed to provide automatic
control of lighting, heating or ventilation loads. The MWS3 detects movement
using a highly sensitive microwave detector. This works by emitting low power
microwave signals and measuring the reflections as the signals bounce of
moving objects. The MWS3 has a unique adjustable sensor head that allows
the area of detection to be optimised for the application.
When movement is detected the load is turned on. When an area is no longer
occupied the load will switch off after an adjustable time out period.
An internal light sensor provides additional energy saving in lighting applica-
tions. When an area is occupied lighting is only switched on when the level of
natural light is below a preset level.
An integral IR sensor in the unit allows the lux settings to be changed and the
sensor to be overridden using a remote control handset (part no: UHS).
D ESCRIPTION AND O PERATION
W IRING & F IXING
Warning. This device works at mains potential. Be sure to take care when working with
electricity.
1. Make sure the load is connected and in working order.
2. Isolate the mains supply to the circuit at the main consumer unit.
3. Connect the controller via the terminal block. Live supply to the Lterminal,
Neutral to the N terminal and the load to the L/OUT terminal.
4. Swing the sensor head down using the finger slot to expose the settings.
5. Use a small screwdriver to set the LUX level adjuster fully clockwise, the time to
minimum (fully anticlockwise) and the sensitivity to maximum (fully clockwise)
using the diagram below.
6. Apply power—the load should come on immediately.
7. Vacate the room or remain very still and wait for the load to switch off (should
take no more than 2 minutes).
Check that the load switches on when movement is detected.
8. To set the LUX level wait until the level of natural daylight is just enough that
lighting is required. Starting with the LUX adjuster fully anti-clockwise. Very
slowly turn the adjuster clockwise until the lights come on. Note that when the
LUX adjuster is fully clockwise then the lights will always come on with occu-
pancy.
IR handset:
LUX setting can be done using the lux up and lux down
buttons.
9. Select the time out range using the adjuster, fully clockwise is the maximum.
10. The area of detection can be varied by altering the angle of the sensor head
and the sensitivity adjuster. Note: on maximum sensitivity this unit is extremely
sensitive to movement and may detect through thin walls or partitions. If this
causes a problem reduce the sensitivity by turning the adjuster anticlockwise.
11. IR handset: the override on button turns the unit on permanently; the
override off button turns the unit off permanently; the cancel button
cancels the overrides. When an override is selected an LED will flash
inside the unit.
I NSTALLATION
Wire the products as in the diagram below.
To switch from more than one position simply wire two or more units in
parallel to achieve two way and intermediate switching.
The detector should be sited so that the occupants of the room fall inside
the detection pattern shown overleaf, at a recommended ceiling height of
2.8m.
Corridors or aisles: the unit should be placed at the end of the corridor or
aisle and the sensor head should be angled to look down the corridor or
aisle.
Open plan areas and offices: the unit can be mounted in a corner looking
outwards in which case the sensor head should be angled . Or the unit can
be mounted in the centre of the area with the sensor head flat.
Note that the higher the sensor is installed the shorter the detection range
will be.
• Do not site within 1m of any lighting or ventilation equipment.
• Do not fix to a vibrating surface.
• Site as far away as possible from the surface of metal objects.
To flush mount:
• Cut a 86mm hole in the ceiling
• Insert the mounting clip into the hole and carefully push the two
fixings on the arms downwards until they grip firmly to the ceil-
ing
• Unscrew the back plate, connect (see below) and re-fix the
back plate
• Push the unit into the clip and setup as instructed below
To surface mount:
• Unscrew the back plate and fix straight to the ceiling or to a
BESA box
• Connect and re-fix the back plate
• Setup as instructed below
Ref %WD136 Issue 1

LOAD
10 Amp resistive load
8 Amp incandescent lighting
5 Amp fluorescent lighting
3 Amp compact fluorescent lighting
3 Amp low energy lighting
3 Amp low voltage lighting (switch primary of transformer)
Fluorescent lighting (max 6 fittings recommended)
For fluorescent lighting total power factor correction capacitance must
not exceed 40F.
3 Amp fans and ventilation equipment
Switch SON lighting loads via a contactor
SUPPLY VOLTAGE 220-240 Volts AC 50 Hz
TIME OUT PERIOD Adjustable 15 seconds to 30 minutes.
LIGHT LEVEL Light to dark.
FIXING METHOD Flush fixing in 86mm hole using clip provided
Surface fixing using integral back plate
TERMINAL CAPACITY1.5 mm
2
MATERIAL Flame retardant ABS, fixing clip polypropylene
TYPE Class 2
TEMPERATURE -10°C to 35°C
SAFETY The microwave radiation emitted by these units
is exteremely low power.
At a distance of > 50mm the power density is
<6% of the ANSI IEEE C95.1 –1991 recom-
mended microwave power density.
At a distance of 5mm from the unit it is <84%
of recommended power density.
CONFORMITY EMC-89/336/EEC
LVD-73/23/EEC
LOAD DOES NOT COME ON
Check to see if the live supply to the circuit is good. Strap across the L
and LIVE OUT terminal to turn the load on.
If the supply and wiring are good, check the LUX level setting. In-
crease the LUX level setting to allow the controller to turn on at higher
ambient natural light level.
LIGHTS DO NOT GO OFF
Ensure that the area is left unoccupied for a greater time period than
the time out period set using the switch.
Make sure that the sensor is not adjacent to vibrating surfaces or
objects (e.g. ventilation equipment).
The unit may pick up movement through thin partitions or walls. Re-
duce the sensitivity by turning the adjuster anticlockwise.
The unit may pick up movement that occurs behind the sensor. Re-
duce the sensitivity by turning the adjuster anticlockwise.
IMPORTANT NOTICE!
This device should be installed by a qualified electrician
in accordance with the latest edition of the IEE wiring
regulations.
C.P. Electronics Ltd
Unit 2 Abbey Manufacturing Estate
Mount Pleasant, Wembley
Middlesex. HA0 1RR
Tel: + 44 (0) 20 8900 0671
Fax: + 44 (0) 20 8900 0674
www.cpelectronics.co.uk
[e-mail]
Due to our policy of continual
p r o d uc t i m p r o ve m e n t C P
Electronics reserves the right to
alter the specification of this
product without prior notice.
P ART N UMBERS
F AULT F INDING
S PECIFICATION
D ETECTION P ATTERNS
MWS3 Multi-sense microwave presence detector
Ref %WD136 Issue 1
IDEAL FOR CORRIDOR
OR AISLE APPLICATIONS
IDEAL FOR CORRIDOR
OR AISLE APPLICATIONS
IDEAL FOR OPEN PLAN
AREAS AND OFFICES