MK K1521WHILV Installation guide

Brand: MK

Model: K1521WHILV

Type: Installation guide

This manual is also suitable for

K1522WHILV

FEATURES

OTE:

For correct operation, it is very important that the

otal load

UST NOT

e less than the minimum power/load

rating

AND MUST NOT be greater than the maximum

ower/load rating marked on the dimmer. This rating is shown

in Watts (W) & Volt/Amps (VA) on the back of each dimmer.

Soft Start When the dimmer is switched on, the brightness of

the lights will be gradually increased over a period of 1 to 3

seconds until a pre-selected level (set by the control knob, is

attained.

This feature alone will help to greatly extend the life

expectancy of filament lamps, by avoiding the initial power

surge.

Overload Protection If any of the dimmers are overloaded,

the output to the lamp(s) will be automatically reduced to

provide protection against damage to the dimmer and to the

installation. An Intelligent Power Monitoring System (IPMS) is

used to provide protection from overload by reducing power

levels to the load(s) in stages according to the severity of the

overload, as follows: - (Note; The first figures given are the

appr

oximate load on the dimmer as a percentage of its

maximum rating.)

Intelligent Dimmer Switch

These dimmers comply with both

BS EN 60669-2-1 & BS EN 55015

Please keep this leaflet for future reference

SAFETY INSTRUCTIONS

• This product must be installed by a competent person in

accordance with the current editions of the IEE Wiring

Regulations (BS7671) and Buildings Regulations. If in any

doubt, consult a qualified electrician.

• To prevent electrocution, do not work on any appliance

live. Turn off the mains supply before commencing work.

• If this product has a metal front plate it must be earthed.

• To prevent fire hazard do not exceed the rated load

specified for the product.

• The minimum box depth required for white plastic dimmers

when using the supplied pattress is 16mm.

• Single white plastic dimmers without a pattress, as well as

all other dimmers with front plates of at least 9mm deep,

the minimum box depth required is 25mm.

• Double dimmer in a one-gang plate require a minimum box

depth of 35mm

44157 PL Ed. 2

• All dimmers with a front plate less than 9mm deep require

minimum box depth of 35mm.

•

Dimmer switches must not be used in bathrooms,

washrooms or any location subject to splashes of water

condensation or dampness.

•

Product and packaging should be disposed of via standard

refuse facilities at the end of their life.

GENERAL INFORMATION

• Dimmers are available with one or two modules mounted

on the same fr

ont plate. Dependent on power output, they

are also available in one or two gang front plates with

single or double dimmers.

• The control knob(s) has a push on/push off action. Rotation

of the knob(s) will vary the light setting.

• The terms one-way and two-way switching refer to the

mode of switching required in an installation.

• One-way switching is used in installations where a circuit is

contr

olled by just one switch. e.g. controlling one light

om a single switch which is either on or off.

See Figur

e 1

• Two-way switching is applied to installations where a circuit

is often controlled by two switches, e.g. controlling a light

circuit from two switches located some distance apart, one

switch at one end of the room and another switch at the

other end.

• MK intelligent dimmers have two-way switching, which

llows their use in either application.

•

In a two-way installation as shown in

igure 2

only one

dimmer must be used. A standard 2-way switch must be

sed in the other position.

• As long as the rotary control knob is not turned, when

pressed, the dimmer will switch on at the previously set

light level. This is also true in the two-way set up described

above and shown in

Figure 2, even when operated by the

remote switch.

• To avoid damage to the dimmer, do not operate outside its

maximum and minimum wattage, or Volt/Ampere limits.

These limits are given on the rear of the dimmer, on the

packaging and in the Specification section below.

• The dimmers should not be installed where an ambient

temperature is outside the 0ºC & 40ºC limits.

NOTE: It is normal for the front of the dimmer to become

quite warm in use, the temperature reached being

dependent upon the lamp load and the ambient

temperature.

• MK dimmers employ the latest technology, using micro-

controller based circuitry to provide the features described

in the following section.

Up to 125 Load will receive maximum power continuously.

>125 to 150 Output to the load will be reduced to 50% of

the maximum after a delay of appr

oximately 20

seconds after switch on.

>150 to 200

Output to the load will be reduced to the

minimum setting after a delay of approximately

20 seconds after switch on.

>200 Output will be disabled (dimmer will switch off)

almost instantaneously after switch on.

Nor

mal operation will r

esume after the dimmer is switched of

and turned back on, with the load adjusted to be within its

maximum and minimum ratings.

COMPATIBILITY WITH LOW VOLTAGE LIGHTING SYSTEMS

One for

m of Low V

oltage Lighting System comprises a good

quality wir

e wound step down transfor

mer for Low V

oltage

Lighting loaded with suitable Low Voltage Tungsten Halogen

lamps(s). Another for

m comprises a fully dimmable Electr

onic

Transformer, specifically designed for dimming using phase

delay, phase-cut-on or leading edge type of dimmer, loaded

with suitable Low Voltage Tungsten Halogen lamp(s).

The dimmers are designed to work with a large number of

fully

dimmable

, good quality, Wire Wound as well as Electronic Low

oltage Lighting T

ransformers, which are recommended for

use with phase delay, or leading edge type dimmers.

DO NOT

use transfor

mers that are only suitable for use with phase cut,

phase cut-off, or trailing edge type dimmers.

So as not to compr

omise system safety

, MK r

ecommend that

transformers have built in thermal protection and have over-

current protection on both primary and secondary circuits. The

V system must comply with the EMC dir

ective and car

y the

CE marking. The total

transformer load on the dimmer

(obtained by adding together the load rating of each

transformer) must be within the minimum and maximum load

rating W/V

A of the dimmer.

In addition, transformers MUST be loaded correctly and they

must provide correct loading to the dimmer, within its specified

minimum and maximum Power/Load ratings.

For optimum performance of the dimmer, load each

transformer with lamp(s) so that the total load on each

transfor

mer is between 75 - 100% of its rated load. (e.g. load a

transfor

mer rated at 25 to 105W/V

A with lamps, so that their

total wattage adds up to 80 to 105 watts.)

NOTE: Some transformers for low voltage lighting have

input circuits which, when used with phase delay type of

dimmers, r

esult in ver

y high peak power pulses in the

dimmer. To avoid overloading and possible malfunctioning

of the dimmer

, do not connect more than the maximum

number of transformers specified below, to any one

dimmer

Up to 300W/240VA dimmers - Max. 4 transformers.

Over 300W/240V

A dimmers - Max. 5 transformers.

The dimmer's micro-controller based circuitry monitors the

essentially a.c. supply conditions r

equir

ed for wir

e wound

transformers and if a d.c. supply condition is detected due to

some fault, which could overheat and damage the transformer,

the dimmer automatically turns off the supply to the

transformer after a short period.

COMPATIBILITY WITH MAINS VOLTAGE HALOGEN LAMPS

The soft start feature incorporated in this range of dimmers

makes them ideally suited to drive mains voltage halogen

lamps, which have inherently high inrush currents at switch on.

By using a soft star

t with this type of load(s), not only is the

dimmer protected against premature failure but the lamp(s)

load also benefits fr

om pr

olonged life due to limitation of the

life shortening high inrush currents at switch on.

Failur

e to comply with the pr

e-r

equisites given above could

compromise System Safety.

None of these MK dimmers are suitable for use with

fluorescent lighting, including energy saving lamps.

44157 PL Dimmer Switch Ed.2 2/2/2006 11:32 am Page 1

removing the old switch. This should make it far easier to

nstall the new dimmer.

. For better thermal management, the dimmer should

preferably be installed with its terminals at the bottom.

. A one-way installation is where simple on or off switching

and dimming of one light is required from a single switch.

9. Strip back the outer cable sheath and trim the inner cables

to the appropriate length.

10. Carefully strip the inner cable insulation to expose 8mm of

the conductor.

11. All live conductors should have red (brown) sleeving. This is

achieved by fitting a short length of sleeving over the end

of any lead that has black insulation.

12. Ensure each wire is connected to the appropriate terminal,

as shown in the typical diagram -

Figure 1.

13. When an earth lead is installed, ensure it is connected to

the terminal in the mounting box. A length of green/yellow

sleeve must be fitted over all earth conductors.

14. If the product has a metal front plate, an earth lead

MUST

be connected between the earth terminal on the dimmer

and the earth terminal in the back box. Again a length of

green/yellow sleeving must be used over the bare earth

conductor.

121110

INSTALLING THE DIMMER IN A ONE-WAY SITUATION

. Make sure the previous sections of these instructions are

ully understood and complied with prior to installing the

dimmer.

. Please note; the colour codes used in the UK prior to April

2004 are as follows: -

Live = RED Neutral = BLACK

In all other areas of the EU, as well as new build installations in

the UK after April 2004, the colour codes used are: -

Live = BROWN

Neutral = BLUE

The first colour indicated in the following text will be that used

prior to April 2004. The second colour, shown in brackets, is

the colour used after April 2004.

3. Some products have the fixing screws clipped to the rear of

the product. These should be unclipped before installing

the product.

4. Ensure the mounting box is firmly fixed to the wall.

5. If the mounting box has four fixing lugs, it may be

necessary to bend the top and bottom lugs back, so as to

clear the back of the dimmer moulding.

6. If replacing an existing dimmer or switch, always take

careful note of the cables and terminal descriptions before

Figure 2 - typical two-way switch circuit

(1 dimmer only must be used)

COM L2 L1

L2 COM

Load ’L‘ fr

om mains

supply

Dimmer

Figure 1 - typical one-way switch circuit

Load

Dimmer

2-way

Switch

COM

L1 L2

’L‘ from mains

supply

in Max Min Max

Wattage Wattage W or VA W or VA

Single 40 300 40 240 4

Double 40 300 40 240 4

Single 60 500 60 400 5

Double 60 450 60 360 5

SPECIFICATION

ominal mains supply voltage . . . . . . . . . .230Volts a.c.

ax. acceptable mains fluctuation . . . . . . .216 to 253V a.c.

Mains frequency . . . . . . . . . . . . . . . . . . . . .50Hz ± 3Hz

mbient temperature range . . . . . . . . . . . .0°C to 40°C

These dimmers can be used with the following: -

• Fused GLS Tungsten Filament lamps to BS EN60064 &

BS EN60432-1, rated at 230/240 volts only.

• Mains rated Halogen lamps with GU10 bases, to BS

EN60064 & BS EN60432-2.

• Wire wound Low Voltage transformer(s) of good quality,

either laminated or toroidal.

• Fully dimmable Electronic Transformer(s) suitable for

mains input voltage range specified above, used in

conjunction with Low Voltage Halogen lamp(s).

NOTE: Transformers must be suitable for dimming; using

the leading edge phase delay, and not just the trailing edge

phase cut type of dimmers.

Under no cir

cumstances exceed the minimum / maximum

ratings given in the chart shown on page 10.

15. If an earth terminal is not present on the dimmer or

mounting box and earth protection is not required, then

any ear

th wir

e must be fully insulated by an appropriate

means.

16.

Carefully push the wired unit back into the back box,

ensuring cables are not trapped or pinched.

17.

Using the scr

ews pr

ovided, mount the dimmer onto the

back box, making sure the screws are not over tightened so

as to prevent damage or distortion to the front plate.

Adjust so the fr

ont plate is squar

e on the wall.

18.When carrying out insulation resistance testing, first

disconnect the dimmer. Failing to do this could damage the

dimmer and could also give spurious insulation readings.

INSTALLING THE DIMMER IN A TWO-WAY SITUATION

1. A two-way installation is when a dimmer is used in

conjunction with a two-way switch, to contr

ol one light

from more than one position.

If replacing an old switch, carefully note the terminals to

which each wire is connected. (com., L1, L2 etc.) This will

help to ensur

e cor

ect connection to the new dimmer

3. Follow the instructions for installing the dimmer switch in a

one-way situation given above, except this time using the

cir

cuit shown in

Figur

e 2

for the ter

minal positions.

CLEANING FRONT PLATES

In order to protect the surface finish quality of the front plate,

periodic cleaning should only consist of polishing with a dry lint

ee soft cloth. On no account should abrasive or domestic

cleaners be used.

1. On front plates mounting multiple dimmers, the minimum

/ maximum W and VA ratings given are for each dimmer.

2. The minimum load of the transformer should not be less than the

Min. Power/Load Ratin

of the

, even if the transformer

has a lower Min. power/Load rating (e.g. 20W or VA).

3. If the transformer is loaded with more than one lamp to

achieve the minimum load in accor

dance with the Min.

Power/Load Rating, then on failure of one or more of the

lamps, the total load may fall

below the Min. Power/Load

Rating of the dimmer

, which could result in the system not

functioning correctly.

Number

mounted

on plate

Power/Load rating

with mains Tungsten

LS lamps

ower/Load rating

with mains Tungsten

alogen Lamps and

LV Transformers

Max No.

ransfor-

mers per

dimmer

MK Electric

Novar ED&S Ltd

The Arnold Centre, Paycocke Road, Basildon,

Essex SS14 3EA. U.K.

Tel: +44 (0)1268 563000

Fax: 01268 563405

(UK Sales)

Fax: +44 (0) 1268 563360 (International)

email: technical@novar.com

web site: www.mkelectric.co.uk

Technical queries should be made to:

MK Electric, Technical Sales and Services Department

The Arnold Centre, Paycocke Road, Basildon, Essex SS14 3EA

Tel: +44 (0)1268 563720 Fax: +44 (0)1268 563064

All marks in this document identified with a R or TM symbol

adjacent to the mark are Trade Marks of Novar ED&S Limited.

44157 PL Dimmer Switch Ed.2 2/2/2006 11:32 am Page 5

MK K1521WHILV Installation guide

Brand: MK

Model: K1521WHILV

Type: Installation guide

This manual is also suitable for

K1522WHILV

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MK K1521WHILV Installation guide

This manual is also suitable for

MK K1521WHILV Installation guide

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