DANLERS CEPH NO Installation Notes

Troubleshooting
The load will not switch on with the CEPH RE
• The manual wall switch must be turned off for about 5 seconds and
back on again to reset the photocell.
The load switches on and off every minute with the CEPH NO
• Too much artificial light is entering the photocell.
The load switches off after a minute with the CEPH RE
• Too much artificial light is entering the photocell.
The lights switch on too early, when it is light enough in the room
• Rotate the LUX adjuster further clockwise, towards '-'.
The lights switch on too late, when it is already dark in the room
• Rotate the LUX adjuster further anti-clockwise, towards '+'.
Precautions and Warranty
This product conforms to BS EN 60669-2-1.
Please ensure the most recent edition of the appropriate local wiring regulations are observed
and suitable protection is provided e.g. 6 amps over current, 1kV over voltage. Please ensure
that this device is disconnected from the supply if an insulation test is made.
This product is covered by a warranty which extends to 5 years from the date of manufacture.
Products available from DANLERS
• PIR occupancy switches • Daylight linked dimmers • Manual high frequency dimmers
• Photocells • Radio remote controls • Time lag switches • Outdoor security switches
• Dimmers • Heating, ventilation and air-conditioning controls • Bespoke / O.E.M. products
Please call for more information or a free catalogue, or visit our website.
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 Web: www.danlers.co.uk
Company Registered Number 2570169 VAT Registration Number 543 5491 38
21/01/11
Ceiling socket mounted photocell switches
CEPH NO
DANLERS ceiling socket mounting photocell switches can be plugged
into a Klik-AX lighting socket (DANLERS order codes: CESO or
CESO SQ (diagram A).
When the ambient light level falls below the LUX threshold the photocell
will switch the connected load on. It will switch the lights off again
when the light level raises to approximately twice the LUX threshold,
to avoid the possibility of 'hunting'.
The LUX threshold can be set by the user to between approximately
100 and 1000 lux at the work surface by the LUX adjuster (diagram
B). There is also an infinite lux setting where the lights will be switched
on constantly.
There is a time delay of approximately a minute before switching
actually occurs, to avoid nuisance short term switching caused by a
passing cloud etc. A small red LED changes state as soon as the LUX
threshold is traversed to make set up easier.
The CEPH NO product will switch the lights on and off without user
intervention. However with the CEPH RE, reset version, the load will
only switch on again once a manual wall switch (wired before the
photocell, diagram B) is switched off (for 5 seconds) and on again.
Each time the manual wall switch (wired before either type of photocell)
is switched, the lamp will switch on for 1 minute regardless of the
ambient lux level.
Loading
These Photocell switches can switch up to 6 amps (1500W) of:
• Fluorescent lamps, high frequency or switch start
• Incandescent or mains halogen lamps
• Electronic or wire wound transformers.
They can also switch up to:
• 1 amp (250W) of fans or metal halide lamps.
INS931 CEPH
Installation notes
CEPH RE
(recommended with integral safety fuse)