Impellers; Sound Level; Safety; Electrical Connection - Helios GigaBox GBWT120 Série Notice De Montage Et D'utilisation

Installation and Operating Instructions
UK
NOTE
WARNING
NOTE
NOTE
WARNING
Centrifugal fans – GigaBox GBW../GBD.. T120
1.9

Impellers

The GigaBox fans have backwards curved centrifugal impellers made from aluminium with galvanised steel support
plates. The impeller and the motor as one unity are dynamically balanced to quality standard G 6.3 or 2.5 – DIN ISO
1940 T.1.

1.10 Sound level

The sound levels stated in the catalogue can differ considerably after installation as the sound pressure level depends
on the absorption capacity of the room, the place of installation and other factors. Sound reduction is possible by using
sound attenuators and by speed regulation.

1.11 Safety

- A certified electrician may only carry out all servicing and installations.
- The fans may be operated only with the rated voltage indicated on the type plate.
- Technical data on type plate are to be adhered to without fail.
- The degree of protection given on the type plate is only valid with designed installation in accordance
with these installation and operating instructions and with closed aggregate.

1.12 Electrical connection

All work must be carried out with the equipment fully isolated from the power supply. The electrical connection
is to be carried out in accordance with the relevant wiring diagram and is only to be done by a certified electri-
cian. The electrical connection must be fully isolated from the supply up to the final assembly!
All relevant safety regulation, national standards and norms are to be adhered to. An appliance is required for cut off
from the supply with a minimum of 3 mm contact opening of each pole. The rated voltage and frequency must corre-
spond with the data on the type plate. The standard terminal box is located on the motor support plate.

1.13 Protection against accidental contact

When installing observe the valid regulations for labour protection and accident prevention. Any contact with rotating
parts must be avoided. Make sure that no textiles (such as curtains) or other materials, which could be sucked in, as for
instance clothing, are close to the suction area of the fan.
Depending on the installation conditions a contact safety device on the discharge side may be necessary.
Corresponding grilles are available as accessories. Fans protected by their installation in ventilation channels or closed
aggregates do not need a protection grille, if the installation guarantees the protection (see DIN 31001 and 24167). We
emphasize that the installer will be held responsible for accidents occurring as a result of missing protection devices.

1.14 Air flow direction and direction of rotation

The Gigabox T120 model ranges have a fixed direction of rotation, i.e. they are not reversible. An arrow on the units
indicates the direction. Correct rotation must be ensured when running the fan. Incorrect direction of rotation leads to
lower air volumes, increased noise levels and a higher electrical current, which will harm the motor.
The fan should be installed in such a way to ensure desired air flow direction in the system.
The air flow direction of the fans can be determined by appropriate installation (see operation/use above). The dischar-
ge is possible in any direction by changing the discharge adapter and side panels to suit to desired result. Therefore
most desired discharge options are available.

1.15 Speed control

All units (except GB 630/4 T120, GB 710/4 T120) are speed controllable via a 5-step transformer controller (accessories).
The 3 phase units can also be operated via star-delta connection giving 2 speed steps (accessories - 2 speed switch
DS 2 or motor protection unit M 4).
3-phase units are controllable with Helios frequency inverters (accessories). For safe operation a sinus filter on all pha-
ses must be installed between motor and inverter. When speed controlled, the maximum air flow temperature stated
for speed-controlled fans (TR) must not be exceeded. The suitable performance curves and controllers can be found
on the equivalent catalogue page(s).
The use of the other brands, especially other electronic devices, can lead to malfunctioning and even failure of
controller and/or fan. Controllers, which have not been cleared by Helios, are not liable for warranty and gua-
rantee claims.

1.16 Motor protection

All Gigabox T120 units are equipped with maintenance-free motors with build-in thermal contacts, suitable for conti-
nuous operation S1, insulation class F. All units should be connected to a suitable motor protection device (accesso-
ries, see catalogue). Only through this an approved motor protection is achieved.
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