Series; Performance Data; Noise Data; Installation - Helios VDD T120 Série Notice De Montage Et D'utilisation

Installation and Operating Instructions
EN
* (performance and noise data can be found
in the current Helios publications and on the
internet)
CHAPTER 3

INSTALLATION

VDD.. – Roof Fans
ding to chapter 8. In case of reshipment (above all, over longer distances; e.g. by sea), it must be checked whether the
packaging is suitable 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 roof fan series:
Series
Vertical Roof Fans VDD..
Binding information on the individual fan types can be found on the type plate.
2.6

Performance data

The unit 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 and with unhindered
inflow and outflow. Different versions and unfavourable installation and operating conditions can lead to a reduction of
output.
2.7

Noise data

The noise data* also refers to the directive mentioned in section 1.4. Housing variations, unfavourable operating con-
ditions and many other things can lead to an increase in the specified catalogue values. Data that refers to certain di-
stances (1, 2, 4 m) apply to free field conditions. With regard to installation, the sound pressure level can differ signifi-
cantly from the catalogue data, as it is highly dependent on the installation conditions, i.e. on the absorption capability
of the room, the room size among other factors.
3.0 Installation
The installation site must be suitable for the roof fan in type, composition, ambient temperature and ambient medium.
The substructure must be level and sufficiently load bearing. The mounting elements should be as level as possible
(max. 5 % incline), however, installation on inclined surfaces up to 45° angle of inclination is possible (e.g. pitched
roof base type SDS, Accessories).
3.1

Mounting

The roof fans are designed for base installation. The base plate of the fan has 4 holes for mounting to the base.
Place the fan with the base plate on the base (see Accessories). In this respect, observe the respective
installation and operating instructions for flat roof bases. Tighten the anchor screws equally to avoid warping.
NOTE: If a VDD 710/6 is installed in combination with a backdraught shutter (RVS/RVM 710), an extension
duct (VR 710) is required between the unit and the backdraught shutter.
NOTE: An extension duct (VR 710) is not required with a hinged base attenuator (SSD 710).
Version
T120
4
Diameter
315 - 710 mm