Instruction Sheet for Waterproof Transformer

Toroidal safety transformers for low voltage supply 12volt or ( 24 volt to order ) waterproof series are ideal for demanding applications if correctly installed by a qualified person and if the following instructions are adhered to precisely.

. Isolate mains supply before installation commences.

. The mains tension as well as the connected load must be the same as that shown on the

label. Do not exceed the maximum load of the transformer.

. Do not lengthen the lead from the transformer to the lamp fittings to avoid an

excessive voltage drop.

. The transformer is classified as Class II double insulated so it does not require an

earth connection.

. Black lead with label attached (230 or 240V~) must be connected to the mains supply,

where Blue is Neutral and Brown is Live. Black lead without label must be connected

to the low voltage load (lamps) – Follow transformer label indications.

. Transformer, although classified as waterproof up to 30 centimetres in depth, should

not be installed in water. The Transformer’s IP68 classification can withstand the

effects of accidental immersion in water due to temporary flooding of a room or after

heavy rain or a storm, naturally if the mains power supply is adequately protected as

well.

. Transformer is therefore ideal for use in humid area or where water, rain or snow may

be present. It can be placed in an adequate inspection well, or near fountains and

small lakes or other sheets of water in general.

. Transformer can also be buried directly into the ground but only after ensuring that the

hole size is at least double that of the transformer, has good water drainage and is

packed with sand under, around and on top of the transformer. This to ensure firstly,

water drainage and secondly, when filling with normal earth or stones, compacting or

earth settlement do not cause the risk of deformation of the housing box which would

then not guarantee watertightness. Care should be taken that the input and output

cables are not distorted near the cable glands or forced in such a way as to loosen the

glands. Protect the mains lead against abrasion or impact damage as requested by

electrical rules. To avoid housing box deformation, do not install under earth, in a

walking area or transitable site.

. The housing box guarantees watertightness if correctly installed, but housing

deformation, from whatever cause, will not provide the same guarantee. For this

reason before using the transformer, correct installation must be controlled and

assured. Do not hold or carry the transformer by the electrical cables or install

in a way that will deform the transformer housing box, as this may cause water to

enter via the cable gland nuts. Rewiring of the transformer may compromise the

IP rating of the fitting and may invalidate the guarantee. Should rewiring be

necessary, for any reason, please read with attention to the last paragraph below.

Remember that the housing box is made in plastic, so please take care not to

deform the box.

. Avoid installing the transformer (if it is to function during daylight hours) directly in

sunlight, as the temperature within the housing box, particularly during the summer

2

months, could reach very high levels causing the automatic thermal protection to

intervene thus shutting down the transformer and resetting it only when the

temperature has returned to normal levels. The polycarbonate housing box can

however, remain exposed to the sun’s rays without any adverse effect.

. The transformer is normally supplied with 1,8 – 2 metres of pre-wired cable. When

requested without cables or when rewiring is necessary, transformer should be

installed only by a qualified person or electrician. When removing the lid of the

housing box, care should be taken of the positioning of the washer, as this needs to

be re-installed in exactly the same position after ensuring that the area is

completely clean of earth, dust etc. Use only electrical cable with an adequate

section function of load amperage and the minimum length possible on the low voltage

side, to limit voltage drop. Cables should be sleeved with heavy duty sleeving (such

as HO5RN-F) with a round section. A small section (but not below 2x0,75 mm) can

be used on the primary side (a different section from primary and secondary, assists

later in recognizing the mains cable, if the same colour is used). Care should be taken

to tighten the cable glands but not excessively to avoid the cable gland slipping on the

housing box with possible moisture penetration. Correct locking of cable with soft

rubber sleeving can simply be achieved by tightening with fingers without the use of

any particular type of tool. Mains supply input cable (230 or 240 volt) is to be

connected to the two pole primary terminal block where the two small brown or black

(sometimes one brown and one white) wires from the transformer are already

connected. (Indications of mains supply cables are indicated on the transformer label,

inside of the box). The other two pole terminal block where the secondary coil

enamelled has yellow or red copper wires are connected directly, is for the 12 or 24

volt output cable. For ease of assembly, it is recommended that the cables are pushed

further through the cable glands, then connect the cables to the terminal blocks and

tighten the holding screws. Correctly position the washer and the lid and pull on the

non-required extra cable. Strongly screw down the lid with the supplied screws with a

screwdriver and then tighten the cable glands. Prior to positioning the transformer

ensure that all the washers are correctly placed in their seating and that the lid itself

does not move in respect to the housing body. A little movement can be possible only

with an application of a considerable force. This means that the housing box is

correctly closed.