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Installation and Operating Instructions
* (performance and noise data from the
currently valid Helios documents and the
internet)
CHAPTER 3
INSTALLATION
m
WARNING
nm
IVR EC – Jet Fans
28 Noise data
The noise data* also refers to the aforementioned directive. Housing 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 m,
2 m, 4 m) apply to free field conditions. With regard to installation, the sound pressure level can differ significantly from
the catalogue data, e.g. sound pressure level at 4 m, as it is highly dependent on the installation conditions, i.e. on the
absorption capability of the room, the room size among other factors.
31 Design
With regard to centrifugal jet fans with EC motor, the speed is controlled using EC technology. The EC controller is
directly connected to the motor. The EC external rotor motors are available in three-phase current (IVRD) and alter-
nating current variants (IVRW). The motor mount is made of steel. There is no standstill heating system in the motor.
Dimensions
IVRW EC 400
400
840
IVRD EC 450
450
939
Impeller:
Aerodynamically optimised, centrifugal impeller made of plastic, directly driven, single-side suction with backward
curved impeller blades. Dynamically balanced according to DIN ISO 1940-1, balance quality G 6.3. Eccentrically ar-
ranged from the impeller in the fan housing. Perfectly coordinated vibration decoupler for direct mounting in fan without
increased construction height.
Housing:
Housing design made of corrosion-resistant aluminium in high-quality lightweight construction for simple installation and
operation under difficult operating conditions. Aerodynamically designed inlet nozzle. Flat design for maximum clearance
height in parking garages and high thrust values.
Accessories:
• Anti-vibration mount for suspension
SDZ 1
Ref no 01454
Possibility of ceiling suspension with anti-vibration mounts SDZ as recommended accessories. For vibration and
sound-insulating suspension (ceiling mounting). Temperature-resistant up to max. 60 °C, fan weight up to 60 kg.
• Isolator switch
RS 6+1 7,5
Ref no 06388
6-pole with auxiliary contact. Plastic housing for surface mounting. Locking options in "0 OFF" position and "I OFF"
position.
32 Installation instructions
m The fan can tip over and crush limbs during installation/unpacking
Sharp edges can cut you during installation
Wear protective footwear and gloves.
1264
311
300
1418
330
370
5
Fig1
All dim. in mm
Fig2
All dim. in mm
EN
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