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DANLERS Limited, Vincients Road, CHIPPENHAM, Wiltshire, SN14 6NQ, UK. 

Telephone: +44 (0)1249 443377   Fax: +44 (0)1249 443388  E-mail: sales@danlers.co.uk    

www.danlers.co.uk

Company Registered Number 2570169   VAT Registration Number 543 5491 38

DAT008

9

 CEFLPIR

 

11/11/2020

PLEASE READ THESE INSTRUCTIONS BEFORE INSTALLING THE PRODUCT

DANLERS ceiling flush passive infra-red 

occupancy switches (PIR) can be flush 

mounted into suspended and plasterboard 

ceilings (diagram A). They include a 2 metre 

connecting flex to make installation quicker 

and easier. 

DIAGRAM A

Clearance 

hole 63mm or 

64mm (2.5") 

diameter

Springs can either be 

left closed (down the 

side of the product) 

or opened out.

These PIR switches incorporate a passive 

infra-red quad sensor to detect movement 

of a warm body within their detection zone 

(diagram B) and a photocell to monitor the 

ambient light level. 

up to 5m
up to 7m

Strong detection zone 

i.e. person moving 

arm or walking 

towards PIR

Secondary detection 

zone i.e. person 

walking perpendicular 

to PIR 

For optimum coverage recommended 

mounting height: 2.4 to 5m

DIAGRAM B  (DETECTION)

Upon detecting movement, if the ambient 

light is dark enough, the PIR switch will turn 

the load on. The ambient threshold can be 

set by the user to between approximately 

30 lux and 1000 lux and maximum 

(photocell inactive) at the PIR via the LUX 

adjuster (diagram C).
If no more movement is detected within a 

pre-selected time, then the PIR switch will 

turn the load off. This time lag can be set 

via the TIME adjuster to 10 seconds, 20 

seconds, 40 seconds, 80 seconds,  

2 minutes 30 seconds, 5 minutes,10 

minutes, 20 minutes or 40 minutes 

(diagram C).

INSTALLATION PROCEDURE

1. Please read these notes carefully before

commencing work. In case of doubt

please consult a qualified electrician.

2. POSITIONING: The PIR occupancy

switch (PIR) should be installed to achieve

correct coverage of the area, see diagram

B. If the photocell override facility is

required, the switch must be located

above an area where daylight can give

greater illumination than the artificial light.

Avoid locating this product where it is

exposed to draughty conditions (exposed

lobbies, open ceiling voids or near fans)

or near heat sources. To cover large

areas PIRs should be spaced in a 5 metre

grid formation.

3. The greatest energy savings will be

achieved if each PIR controls an

independent set of lamps. They can be

wired in parallel but this should ideally be

limited to three, see diagram E.

4. Make sure the power is isolated from the

circuit. The PIR should be connected as

shown in diagrams D & E:
Brown: L (Live in).  Blue: N (Neutral in).

Black: SL(Switched Line out).

NOTE: Terminate the mains cable with the supplied 

terminal block (terminal blocks must comply with EN 

60998-1 or EN 60998-2-1 and be suitable for 0.75- 

1.5mm2 conductors). In order to comply with wiring 

regulations, the terminal block must be enclosed in 

a suitable wiring box (This should comply with EN 
60670-1 or EN 60670-22).

LOADING

See overleaf for loading details.

START-UP MODE

When the PIR is powered up, the PIR will 

switch on the lighting load for 1 minute then 

switch it off. After 2 seconds it will switch 

on again if it detects movement. With Time 

set to minimum the load will stay on for 10 

seconds so the detection range can be 

easily assessed. If a manual override-off 

switch is positioned before the PIR in the 

circuit (diagrams D & E, note 1) it will do this 

each time the wall switch is switched on. 

Alternatively, if the wall switch is placed after 

the PIR (diagrams D & E, note 2) it will not 

enter the start-up mode each time.

TIME AND LUX SET UP

For convenience, ensure that the TIME is 

set to the minimum when setting up the 

LUX level. Afterwards set the TIME to a 

value suitable for the application.
The LUX is best set up when the local 

CEFL PIR

Ceiling Flush Mounted  

PIR Occupancy Switch

 (Presence detection)

Input: 220-240 Vac 50Hz

ambient light is at approximately  the 

minimum desired working light level, a lux 

meter placed on the surface under the PIR 

may help. With the LUX set fully clockwise 

wait for the PIR to switch off. Rotate the 

LUX adjuster slowly anticlockwise (- to +), 

whilst waving your hand approximately 1m 

below the PIR, until the load switches on. 

TIME

min

max

LUX

max

min

Typical settings

30 LUX

1000 LUX

PHOTOCELL

INACTIVE

40m

20m

10m

5m

2.5m

80s

10s
20s

40s

DIAGRAM C  (ADJUSTING TIME AND LUX)

TROUBLESHOOTING

The load will not switch on:

• The LUX adjuster is set too low and is

inhibiting the switch.

• The moving body is not emitting more

IR than the background. (Person

wearing insulating clothing in a warm

environment)

• Person is too far from the PIR switch, see

detection diagram.

• Person is moving unusually slowly

(perhaps when testing).

The load switches on when nobody is 

present:

• Heater causing infra-red variations in a

small cold room. Re-site the CEFL PIR.

• Please contact DANLERS for further

technical support.

VARIANTS - MAINS VOLTAGE

CEFLPPIR 

Includes a Klik-AX plug.

CEFLPIR10A 

Up-rated to switch 10A 

resistive loads.

CEFLPIRSEALED  Suitable for bathrooms 

zones 2 and 3.

CEFLAPIR 

Flush mounted PIR 

absence switch

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