Electrical Connection - Vortice VHD Notice D'emploi Et D'entretien

ENGLISH
ONLY FOR TRANSMISSION FANS GROUPS VHT, VCBPT and VCMAPT: the motor and transmission shafts
connected to the propeller or turbine must be always completely parallel. Likewise the pulleys must be aligned so
none sticks out more than another causing the forcing of one belt. This requirement can be tested by using a simple
metallic ruler with a minimum length equal to the centre points of the shafts and leaning one end against the front
part of one of the pulleys while comparing the position of the other pulley. In the market there are laser machines
that can make the alignment easier. The belt tension should be the adequate, any excess charge can damage the
bearings.

Electrical connection

Each model fan has a connection drawing inside the terminal box. The feeding cable connection should be done
inside such terminal box of the motor or fan. It is important that the feeding lines and other components used in the
installation meet the requirements of the valid regulations of industrial installations.("Low pressure electrical
regulation") and that the protection system are in accordance to the power of the fan (Motor protection system,
differential protection, wiring limit and ground system). For motors over 7.5 HP (5.5Kw) is also suggested to perform
a timed limit relay start up or control it electronically so nor excess consumption peaks occur and ensure a smooth
start up. Some fan models with heavy turbines (VCMAPD and VCMAPT groups) require a long period of starting up.
In these cases it is mandatory a controlled start up. With the other centrifugal medium and high pressure models, a
simple lock gate or regulation valve should be enough so long as they are closed during start up in order to reduce
the consumption.
NOTA: Specially in fans of the VCBPD group and in some indicated models the connection should be done by using
always the thermal protection inside the motor ( See Maintenance of the Fan section).
TENSION AND FREQUENCY: The motor feeding connection must be done according to the tension and frequency
indicated in the fan's plate. Some differences (±5%) can be allowed in the power circuit. If the connection cannot keep
this level there is a high risk of burning the motor. Therefore, ensure the selected disposition of Y-2 corresponds to
the tension of the power circuit and use a tester to check besides the tension the frequency as well.
CONSUMPTION: Control that the consumption (A) once installed in the fan does not exceed the conditions specified
in the fan's plate. The capacity of the fan and the installation charge should be correctly adjusted. In case of non
compliance please consult the manufacturer.
GROUND SYSTEM: According to the current legislations the fan is a Class I and it is mandatory that the ground
system is connected, it can be found inside the connection box of the motor or the fan. Once connected, it is advised
to check that the tolerance between the external conductor and the housing of the fan does not exceed 0.12.
ENVIRONMENTAL CONDITIONS: Verify the thermal class of the motor in its plate. All motors supplied inside a
VORTICE fan usually are class F, but there can be exceptions. Independently of the thermal class of the motor, it is
advised not to exceed 40ºC environment temperature around the refrigerating air of the motor and the humidity
should not be over 60% in order to guarantee the correct refrigeration of the motor and extend its life. The maximum
circulating air temperature should be between 40º and 55º for the models that have the motor placed within the air
flow and about 130ºC for those models that the motor is not in contact with the air flow (some models come equipped
with a refrigerating rotor within the motor's shaft which allow working in higher environmental temperatures). It is
always advised to check carefully all the information of the technical catalogue where a summary of all ranges and
models are explained in detail. For other applications which can require a special characteristic, always check first
the technical data of the fan and in case of doubt or further explanations contact directly the manufacturer.
DIRECTION OF THE ROTATION: It is indicated by the arrow on the housing. To change the direction in one or two
speed three-phase motors simply exchange the phases. In single phase motors, the direction can only be changed
in some models, check the technical data in each case.in alcuni modelli di ventilatore, vedere gli schemi specifici per
ciascun modello.
NOISE LEVEL: Depending on the model of the fan, its power, size and revolutions the noise level can oscillate
between 37 and 100 dB (A). The noise level in each model is specified in the technical characteristics. If the fan does
not comply with the maximum allowed levels of noise where it has been
installed, alternative solutions must be studied in order to reduce it, either by using silencers, soundproof boxes or
barriers.
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