Page 1
TROUBLE-FREE DIMMING
For optimum compatibility choose VARILIGHT dimmers. To calculate the
total load for dimming, add the wattages of all the transformers you are
intending to dim and choose a dimmer with a rating to suit.
Dimmable LEDs:12V a.c. LEDs can be controlled using the YT50LZ transformer up to a
YTZ Series Dimmable
Electronic Transformers
maximum load of 25W. For dimming, add the values of the LEDs to
calculate the load and check the minimum load rating on the dimmer
you intend to use is suciently low. For optimum performance when
dimming LEDs, Varilight V-Pro or V-Com dimmers are recommended.
FEATURES
Thank you for choosing VARILIGHT. We recommend that transformers are tted by a qualied electrician.
Check the rating on the transformer and ensure that the total wattage of the bulbs you are intending to power
from the transformer does not exceed this maximum rating. There is no minimum rating for our transformers.
The YT50LZ may be used to control 12V a.c. LED lighting. For 12V d.c. LED lighting, use part number YT45DC12.
VARILIGHT transformers feature:-
· Soft start which gently brings lights up to full brightness when you switch on and extends lamp life
·
Auto-resetting overload protection (>200% nominal load)
· Auto-resetting over-temperature protection (for T > 100°C)
· Short circuit protection
If the light(s) turn o unexpectedly, it is likely that the associated transformer is overloaded. In this case, reduce
the load by using fewer bulbs or choosing bulbs with a lower rating.
TECHNICAL DATA
YT50LZ YT70Z / YT70LZ YT105Z YT150Z YT210Z
Input voltage 230V a.c. . +/-10% 50Hz for all VARILIGHT transformers
Nominal input current 0.22A 0.32A 0.46A 0.65A 0.93A
Output voltage 11.5V a.c. 11.5V a.c. 11.5V a.c. 11.5V a.c. 11.5V a.c.
Output power range 0-50W 0-70W 0-105W 0-150W 0-210W
Nominal output current 4.3A 6.0A 9.1A 13A 18.2A
Power factor 0.99 0.99 0.99 0.99 0.99
Ambient temperature range 0-40°C 0-40°C 0-40°C 0-40°C 0-40°C
Overvoltage category II II II II II
IP Protection IP20 IP20 IP20 IP20 IP20
Weight 100g 100g 125g 212g 225g
Input terminals 2 leads 2 terminals / 2 leads 2 terminals 4 terminals 4 terminals
Output terminals 2 leads 2 terminals / 2 leads 4 terminals 6 terminals 6 terminals
Case type (dimensions overleaf) A A B C C
Applicable Safety Standards EN 61347-1, EN 61347-2-1, EN 61547, EN 55015, EN61000-3-2, EN 60598
DIMENSIONS
CASE A CASE B CASE C
27.5 mm
33 mm
38.5 mm
DOYLE & TRATT PRODUCTS LTD, CARYLLS LEA, FAYGATE, HORSHAM, WEST SUSSEX, RH12 4SJ, UNITED KINGDOM.
www.varilight.co.uk
YT50LZ YT105Z YT150Z
YT70Z YT210Z
YT70LZ
95 mm
41.5 mm
108 mm
44 mm
167 mm
52.5 mm
52.5 mm
Page 2
INSTALLATION ADVICE
IMPORTANT
· Always turn o the electricity supply at the mains before beginning any electrical work.
· Install in a well-ventilated location, away from heat sources.
· Do not connect the output cables of one transformer to those of another.
· To achieve even light levels between bulbs use identical cable lengths on the output side of the transformer(s).
· Dimmer switches should be located on the primary (input) side of the transformer.
· If you require a longer cable than supplied (for transformers with integral cables) then use a proprietary
terminal block to connect a suitable additional cable, ensuring no bare wires protrude from the terminals.
For transformers located in the ceiling cavity always observe
the recommended minimum distances shown in Fig. 1.
Fig. 1
A minimum distance of 30cm should be maintained
min 5 cm
between the transformer and the bulb, or another
transformer as shown in Fig. 2.
min 10 cm min 30 cm
If many bulbs are being controlled from one transformer,
use a terminal block to distribute the wiring as shown in
Fig. 3.
For situations where several bulbs are controlled by one
transformer and the bulbs are a distance apart, use the
wiring conguration shown in Fig. 4.
Bulbs should always be connected to the transformer in
parallel. Do not connect bulbs in series with one bulb
linked to another.
Position the input and output wires in such a way that they
do not cross, as indicated in Fig. 5.
GUARANTEE
Fig. 2
min 30 cm
max 2 m
Fig. 3
Fig. 4
Fig. 5
In case of any defect return the transformer to our service department. This warranty is in addition to and not in
derogation of the statutory rights of the purchaser and is oered so that you may have the benet of our
technical facilities. Should a defect occur in this unit within 2 years of its purchase we will replace or repair the
defective unit free of charge provided that:a) The unit has been correctly tted according to the instructions;
b) The transformer has not been tampered with or taken apart;
c) The unit is securely packed and safely returned to:Service Department, Carylls Lea, Faygate, Horsham, West Sussex, RH12 4SJ together with a letter stating the
guarantee registration number below, the date and place of purchase, details of the fault, the type and wattage
of the light(s) being controlled and what kind of switch or dimmer was used.
This guarantee states Varilight’s entire liability, which does not extend to cover consequential loss or damage or
installation costs arising from a defective product.
GUARANTEE REGISTRATION NUMBER Z1024.
© DOYLE & TRATT PRODUCTS LTD 2015 www.varilight.co.uk
Loading...