MRT16 Series
Product Guide
Multi Range Time Delay Switches
Overview
MRT16-PB
Push button activation with
optional external trigger
The MRT16 series of time delay switches are designed to provide timed control of lighting, heating or ventilation loads. Usi ng push button, touch (light
press required), pull cord or remote activation, the user can switch on a load for a preset time period and have the load tur n off automatically after the
time period has elapsed.
Multiple timing ranges come as standard to allow the time out period to be set accurately. Time setting is achieved using swi tches and a thumbwheel
at the rear of the unit.
Several modes of operation are selectable using switches:
MRT16-TA
Touch activation with optional
external trigger
MRT16-PC
Pull cord activation with optional
external trigger
MRT16-REM
Remote activation—external
trigger only
On/off: triggering the timer will turn on the load and start the timing. Triggering the timer again during timing will immedi ately turn off the load and
stop the timing.
Resetting: triggering the timer will turn on the load and start the timing. Triggering the timer again during timing will re -start the timing period from
scratch. When using an external trigger In this mode, the timer will not start until the trigger is removed making it ideal f or pump or fan overrun
applications.
Non-resetting: triggering the time will turn on the load and start the timing. Triggering the timer again during timing will hav e no aff ect.
Optional neon indicators provide permanent illumination or illumination during the timing period.
Wiring
Wire the MRT16 timers as in diagram 1. Connection to the TRIG terminal is optional on all units except the MRT16-REM.
Applying a live to the trigger terminal will start the timer running. A momentary switch can be used, for example, in corrido r lighting applications. A
permanent input can be used, for example, in pump overrun applications.
To switch from more than one position simply wire two or more units in parallel to achieve two way and intermediate switching , or use the trigger
terminal with a slave switch.
For lighting applications that call for the replacement of a three wire switching system follow diagram 2.
When installing touch switches do not fix to a vibrating or uneven surface.
Diagram 1 Standard W iring Diagram 2 Wiring for three wire switching circuits
Installation
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 L terminal, Neutral to the N terminal and the load to the LIVE OUT terminal.
Where required connect the external trigger to the TRIG terminal.
4. Set the timing range according to the diagram below. Set the thumbwheel to the time setting (anticlockwise is minimum, clockw ise is maximum).
5. Set the function according to the diagram below (see above for description).
6. Screw the unit to the wall and switch the mains supply back on at the distribution board.
Fault Finding
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 check.
LOAD DOES NOT GO OFF
Check that the time setting is correct.
When using external triggers, ensure that live is
removed from the trigger terminal to enable the
timer to start (for resetting mode only).
Specification
LOAD
16 Amp resistive load
10 Amp incandescent lighting
6 Amp fluorescent lighting
3 Amp compact fluorescent lighting
3 Amp low energy lighting
3 Amp low voltage lighting (switch primary of transf ormer)
Fluorescent lighting (max 6 fittings recommended)
For fluorescent lighting total power factor correction capacitance must not exceed 40μF
3 Amp fans and ventilation equipment
Switch SON lighting loads via a contactor
SUPPLY VOLTAGE 220-240 Volts AC 50 Hz
TIMING PERIOD Adjustable 1 second to 2 hours in ranges
FIXING METHOD Surface fixing 25mm deep plastic surface mount moulded box.
Flush fixing 25mm steel wall box or 32mm deep cavity wall box.
TERMINAL CAPACITY 4.0mm2
MATERIAL Flame retardant ABS
TYPE Class 2
TEMPERATURE -10°C to 35°C
CONFORMITY EMC-2004/108/EC
LVD-2006/95/EC
Part Numbers
MRT16-PB Push button activated multi-range timer
MRT16-TA Touch activated multi-range timer
MRT16-PC Pull cord activated multi-range timer
MRT16-REM Remote activated multi-range timer
/PN Permanently illuminated neon
/TN Temporarily illuminated neon (only illuminates during timing)
IMPORTANT NOTICE!
This device should be installed by a qualified electrician in
accordance with the latest edition of the IEE Wiring
Regulations and any applicable Building Regulations.
FM 45789 EMS 534520
Due to our policy of continual product improvement CP Electronics reserves the right to alter the specification of this product without prior notice.
C.P. Electronics Ltd
Brent Crescent
London
NW10 7XR
United Kingdom
Tel: + 44 (0) 333 900 0671
Fax: + 44 (0) 333 900 0674
www.green-iswitches.co.uk
enquiry@green-iswitches.co.uk
Ref: #WD024 Issue 5
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