Dimmer Features
Batch Number
This Dimmer Switch is suitable for Dimmable LED Lamps and
Incandescent Lamps
Ideal for controlling the DETA range of Fire Rated Dimmable LED
Downlights
This dimmer automatically changes mode, to either leading or trailing
edge, to suit load
Control other load types, e.g. tungsten halogen, incandescent, low
voltage electronic transformers
Soft Start to increase lamp life, particularly for MV and LV lamps
Overload protection will automatically turn off the lamp until the
overload is removed, dimmer cools down and then resets itself
Push on / Push off control for ease of operation
Suitable for 1-way and 2-way switching
Please record the batch number printed on the side of the module on the
back of the product. The batch number is in the form ##Y## A#.
BATCH N°: Y A
This will assist us in providing any technical support you may require.
Safety Instructions
Installation Instructions
Read these instructions carefully. Incorrect installation may damage the
dimmer beyond repair.
This dimmer switch must be installed in accordance with the current
edition of the IEE Wiring Regulations
Always switch off the electrical supply before commencing installation.
Do not overload the dimmer – this may damage the dimmer beyond
repair.
If the dimmer is to be used to control tungsten halogen lamps, de-rate
the dimmer to 75% of the maximum load.
If using in Leading Edge mode, de-rate the dimmer to 75W max. due to
some lamps having a high inrush current.
Use only on an electricity supply of 220-240 volts AC
When controlling the load from two positions, it is only possible to
have one dimmer switch. The other needs to be a 2-way switch.
Ensure that the mounting box is at least 25mm deep.
Metal mounting boxes must be earthed.
If in doubt, contact a qualified electrician.
IMPORTANT:
Read “Loading Advice” section overleaf before installing this dimmer
switch.
1. Switch off the mains supply before commencing the installation.
2. If removing the existing switch, disconnect the wiring from the switch
terminals at the rear and take note of the present wiring of the
switch and the marking on the terminals.
3. Ensure that any mounting box is free of plaster lumps or projecting
screw heads. 1g dimmers can fit into a 25mm back box; 2g dimmer
switches need a 35mm back box to allow for heat dissipation.
4. These dimmer switches can be installed in boxes with two mounting
lugs only. Other mounting lugs need to be removed or bent flat.
5. Terminate the dimmer switch in accordance with the diagrams in the
Wiring Instructions section. Take care that no bare wires project out
of the terminals. Keep wires together in a terminal if they were
together in your old switch.
6. Dimmer switches having a metal front plate must be earthed by
means of the earthing point on the dimmer.
7. After connecting the wires screw the dimmer switch gently into the
wall box so that the front plate does not distort or crack. Do not trap
the wiring between the rear of the dimmer and the back of the wall
box.
Wiring Instructions – Typical Lighting Circuits
This dimmer switch is suitable for 1-way or 2-way lighting circuits. There
are three terminals per module.
1 way Circuits
In 1-way lighting circuits each lamp is controlled by one dimmer switch.
Follow the wiring in Figure 1.
L live supply, load
Figure 1.
2 way Circuits
2-way lighting circuits have two switches turning the same lamps on and
off from two different locations (e.g. at the top and bottom of the stairs),
however only one of these can be a dimmer switch, the other must be a 2way switch. Follow the wiring in Figure 2.
L live supply, load, L1 switch live
Figure 2.
Optimising the Performance of Your Dimmer Switch
This dimmer switch is preset for optimum control of Deta LED Dimmable
Fire Rated Downlights.
Most dimmable lamps have an optimum performance mode – Leading
Edge or Trailing Edge. It is possible to change the dimming mode, this will
prevent the lights from flickering. See “Changing the Dimmer Mode”
below.
Additionally, the minimum brightness setting of the dimmer can be
adjusted to achieve the optimum dimming range for a particular load. See
“Compatibility and Loading Advice” below. Also see “Adjusting the
Minimum Brightness” below.
You may need to refer to these instructions if you change your lights to a
different type at a later date so please keep them for reference.
Universal Dimmer Switch
Slimline
S1261 & S1262
Dimmer Switch 1g and 2g
Slimline Décor
SD1261 & SD1262
Dimmer Switch 1g and 2g
Slimline Screwless
8625 & 8626
Dimmer Switch 1g and 2g
Ultra Flatplate
8125 & 8126
Dimmer Switch 1g and 2g
Ultra Screwless
8525 & 8526
Dimmer Switch 1g and 2g
To be read in full before installation and kept for future reference
Changing the Dimmer Mode
Adjusting the Minimum Brightness
This dimmer automatically changes its mode of operation, leading or
trailing edge, to suit the load, particularly when controlling LED lamps.
If the load, especially LED lamps, do not dim smoothly it is possible to
change the dimmer mode manually. To enter TE (auto detection and
factory default mode) or LE mode:
1. Whilst power is switched OFF, turn control on dimmer to min.
position (1)
Switch power ON (ensure lamp is still switched off at this
point)
Switch lamp ON
2. Turn control to max. position
Switch lamp OFF, then ON
3. Turn control to min. position
Switch lamp OFF, then ON – lamp will flash 4 times – you
then have the option to set trailing edge (see 4. below) or
leading edge mode (see 5. below)
4. Set TE auto detection mode (factory default)
Turn control on dimmer to min. position
switch OFF lamp , then ON
The lamp will flash twice – you have
correctly set TE mode.
Or:
5. Set LE mode
Turn control on dimmer to max. position,
switch OFF lamp, then ON
The lamp will flash once and then dim –
you have correctly set LE mode.
The minimum brightness level can be adjusted to achieve the optimum
dimming range for a particular load.
1. Whilst power is switched OFF, turn control on dimmer to max.
position
Switch power ON (ensure lamp is still switched off at this
point)
Switch lamp ON
2. Turn control to min. position
Switch lamp OFF, then ON
3. Turn control to max. position
Switch lamp OFF, then ON – lamp will flash 2 times
Adjust the control to set your desired min. brightness
Switch lamp OFF, then ON
The lamp will flash once and then dim – you have correctly
set your min. brightness
Note: Steps 1-3 need to be performed within 15 seconds or it will
cause the unit to revert back to previous settings.
Dimmable LED Lamps
Compatibility and Loading Advice
The recommended minimum load per gang is 5W. Always choose LEDs
that are “dimmable” and for the best performance choose dimmable LEDs
from established brands. We cannot guarantee that all LEDs labelled as
“dimmable” can actually be dimmed satisfactorily.
Maximum and minimum loads will vary according to make and type of LED.
If in doubt, use 2 to 10 lamps per gang (100W max).
The dimming performance of dimmable LEDs may be improved by
following the steps outlined above under the heading “Changing the
Dimmer Mode”.
Always use the same brand and wattage of LED lamp on each circuit.
This Dimmer Switch is suitable for:
Most dimmable LEDs [see “Dimmable LED Lamps” box]
Mains voltage incandescent, GLS or candle-shaped bulbs
GU10 or similar good quality mains halogen bulbs
Wire-wound or toroidal transformers (dimmer must be in trailing
edge mode)
This Dimmer Switch is not suitable for:
Fluorescent bulbs and tubes
Electric motors
Non dimmable LEDs
Load Type:
Power Rating per Module:
Voltage
220 – 240V ac 50Hz
LED
5-100W (75W LE Mode)
Compliance
BS EN 60669-2-1
Mains Tungsten Halogen
10-250W
Back Box (recommended)
25mm for 1g dimmers
Incandescent and ECO Halogen
LV Transformers
10-250W
10-250W
35mm for 2g dimmers
A20 0538 10/16 V4 Dim A4
Deta Electrical Company Limited
Kingsway House Laporte Way
Luton Bedfordshire LU4 8RJ UK
Tel.: +44 (0)1582 544 544 Technical Helpline: +44 (0)1582 544 548
Specification
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