3
VDD.. – Roof Fans
Installation and Operating Instructions
1.7 Air-flow direction and direction of rotation
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Parts ejected from the fan may damage your eyes!
Wear protective glass when checking the direction of rotation!
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The rotating impeller can sever or trap your fingers/arms!
Operation only with mounted safety fittings!
Do not insert objects into the rotating impeller! Risk of damage!
The roof fans have a fixed direction of rotation and air-flow direction (they are not reversible), which is indicated by an
arrow on the device reverse operation not possible)!
The direction of rotation may only be checked when the fan is switched off and coasting!
1.8 Speed control*
All fans of type..D can be speed-controlled in one of the following ways.
a) Transformer: All fans up to Ø 450 can be voltage-controlled by means of transformer.
b)
Frequency inverter: All fans over Ø 500 can be speed-controlled with a frequency converter with sine filter.
The use of a frequency inverter without sine filter is only possible with approval from Helios.
The use of third party products, especially other electronic devices, can lead to functional problems, the des-
truction of the controller and/or fan. If control units are used, which have not been approved by Helios, all
warranty and liability claims shall lapse.
1.9 Motor protection device*
a) All 3 phase motors in fans Ø 400 (4-pole) and Ø 450 (4- and 6-pole) have thermal contacts wired on terminals. The
specifically developed motor protection device
MD
is recommended for connection.
b) All motors in fans over Ø 500 have PTC thermistors wired on terminals. The specifically developed motor protection
device
MSA
is recommended for connection.
c) All motors in fans Ø 315, Ø 355 and Ø 400 (6-polig) have integrated thermal contacts, which automatically deactivate
when the motor temperature is too high and reactivate after cooling down.
1.10 Functional safety – Emergency operation
When using the roof fan in an important supply function, the plant is to be designed so that emergency operation is
automatically guaranteed in case of fan failure. Suitable solutions are, for example,: parallel operation of two less pow-
erful units with a separate electric circuit, standby fan, alarm systems and emergency ventilation systems.
2.0 Warranty claims – Exclusion of liability
All versions of this documentation must be observed, otherwise the warranty shall cease to apply. The same applies
to liability claims against Helios. The use of accessory parts, which are not recommended or offered by Helios, is not
permitted. Any possible damages are not covered by the warranty. Changes and modifications to the unit are not per-
mitted and lead to a loss of conformity, and any warranty and liability shall be excluded in this case.
2.1 Regulations - Guidelines
If the product is installed correctly and used to its intended purpose, it conforms to all applicable provisions and EU
guidelines at its date of manufacture.
2.2 Shipping
The fan is packed ex works in such a way that it is protected against normal transport strain. Carry out the shipping
carefully. It is recommended to leave the fan in the original packaging. The fan must be kept in the casing or the provi-
ded lifting lugs (over Ø 450) for transportation or installation. In this respect, only use appropriate lifting equipment and
fastening devices. Weight information can be found on the label on the unit.
Do not transport fan on the connection cables, terminal box or impeller!
Do not stand under suspended loads!
2.3 Receipt
The shipment must be checked for damage and correctness immediately upon delivery. If there is any damage,
promptly report the damage with the assistance of the transport company. If complaints are not made within the agreed
period, any claims could be lost.
2.4 Storage
When storing for a prolonged time, the following steps are to be taken to avoid damaging influences: Motor protection by
dry, airtight and dust-proof packaging (plastic bag with desiccant and humidity indicators). Vibration-free, water-tight and
constant-temperature storage at a temperature in the range -20 °C to +40 °C, which must not be exceeded. In case of
a storage period of more than three months or motor standstill, maintenance must be carried out before start-up accor-
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* The associated control units can be found
in the currently applicable Helios sales
documents.
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* The associated motor protection devices
can be found in the currently applicable
Helios sales documents.
CHAPTER 2
GENERAL INFORMATION
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EN
