4
VARD / VARW.. – High-Pressure In-Line Duct Fans
Installation and Operating Instructions
1.10 Functional safety – Emergency operation
When using the fan in an important supply function, the plant is to be designed so that emergency operation is auto-
matically guaranteed in case of fan failure. Suitable solutions are, for example,: parallel operation of two less powerful
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
Certificates - 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 pro-
vided lifting lugs for transportation or installation –
Observe transportation diagram! Fans which are not packaged in cartons may only be transported n lying on
the flange with the motor facing upward!
In this respect, Only use appropriate lifting equipment and fastening devices. Weight information can be found on the
unit label..
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. In case of reshipment (above all, over longer distances; e.g. by sea), it must be checked whether the packaging is sui-
table for the form and route of transport. Damages due to improper transportation, storage or putting into operation are
not liable for warranty.
2.5
Series
These installation and operating instructions describe the following Helios fan series:
Binding information on the individual fan types can be found on the type plate.
2.6
Performance data
The fan or motor type plate gives an indication of the mandatory electrical values; which must be coordinated with the
local supply network. The fan performances* were established on a test stand according to DIN EN ISO 5801: 2010-
12; they apply to the nominal speed and standard design using an inlet nozzle, without a protection guard with unhin-
dered inflow and outflow and a pressure-side pipe section with 2.5x diameter length. Different versions and unfavou-
rable installation and operating conditions can lead to a reduction of output.
2.7
Noise data
The noise data* also refers to the aforementioned directive. Casing variations, unfavourable operating conditions and
many other things can lead to an increase in the specified catalogue values. Data that refers to certain distances (1, 2,
4 m) apply to free field conditions. With regard to installation, the sound pressure level can differ significantly from the
catalogue data, as it is highly dependant on the installation conditions, i.e. on the absorption capability of the room, the
room size among other factors.
UK
Series
Version
Diameter
VARW
AC
225 - 500 mm
VARD
AC
225 - 1000 mm
* (performance and noise data from the
currently applicable Helios documentation
and the internet)
WARNING
CHAPTER 2
GENERAL INFORMATION
WARNING
